期刊文献+
任意字段
题名或关键词
题名
关键词
摘要
作者
第一作者
机构
刊名
分类号
参考文献
作者简介
基金资助
栏目信息
共找到3,170篇文章
< 1 2 … 159 >
每页显示 20 50 100
已选0条
引用分析
参考文献
引证文献
 统计分析
检索结果
已选文献
显示方式：
HMX/Fe2O3/炭黑复合含能材料的制备及其激光点火性能测试 认领 引用
1
作者 杨全成 郭天冰 +1 位作者 齐秀芳 郭红莉 《材料科学》 2026年第4期187-201,共15页
以催化效果良好的Fe2O3及吸光性能良好的炭黑作HMX复合含能材料的复合成分,并加入适量的氟橡胶作黏结剂,采用溶剂–非溶剂法结合超声震荡的方法制备HMX/Fe2O3/炭黑复合含能材料,以改善HMX的激光点火性能。通过扫描电镜(SEM)、X-射线粉... 以催化效果良好的Fe2O3及吸光性能良好的炭黑作HMX复合含能材料的复合成分,并加入适量的氟橡胶作黏结剂,采用溶剂–非溶剂法结合超声震荡的方法制备HMX/Fe2O3/炭黑复合含能材料,以改善HMX的激光点火性能。通过扫描电镜(SEM)、X-射线粉末衍射(XRD)、红外光谱(FT-IR)、紫外漫反射(UV-Vis-DRS)对复合物进行形貌表征,并对其进行1064 nm激光点火性能测试,结果表明:复合物中的HMX晶型为β型,且颗粒大小分布均匀,粒径在30 μm~60 μm区间内;炭黑能改善HMX基复合含能材料对光的吸收效果,炭黑含量为0.2%的HMX复合药剂对1064 nm波长的光吸收率为47.79%,而炭黑含量为1%的HMX复合药剂对1064 nm波长的光吸收率增加到了59.71%;加入Fe2O3能提高HMX基复合含能材料的质量燃速,仅加入质量分数1%的炭黑的HMX复合药剂质量燃速为0.0279 g·cm−2·s−1,燃速较小,继续向其中分别引入质量分数为1%、2%、3%的Fe2O3后,药剂质量燃速分别提高到了0.0374、0.0524、 0.0796 g·cm−2·s−1。在各组药剂中,各组分质量比(HMX:Fe2O3:炭黑:氟橡胶)为94:3:1:2的HMX复合药剂激光点火效果最好,药剂能够稳定燃烧,还赋予药剂较高的质量燃速0.0796 g·cm−2·s−1。 展开更多
关键词 复合含能材料 激光点火 HMX 溶剂–非溶剂 HMX/Fe2O3/炭黑
暂未订购 下载PDF
超高温油基钻井液用新型Fe2O3-CQDs封堵材料研究 认领 引用
2
作者 郭建华 范炜昊 谢慧华 《能源化工》 CAS 2026年第3期58-64,共7页
为解决超高温环境中油基钻井液处理剂易失效的问题,通过在金属氧化物Fe2O3表面生长碳量子点(CQDs),研制出新型纳米Fe2O3-CQDs封堵材料。XRD、FT-IR、XPS表征结果显示CQDs紧密附着在Fe2O3表面且二者之间存在稳定的相互作用,SEM表征结果显... 为解决超高温环境中油基钻井液处理剂易失效的问题,通过在金属氧化物Fe2O3表面生长碳量子点(CQDs),研制出新型纳米Fe2O3-CQDs封堵材料。XRD、FT-IR、XPS表征结果显示CQDs紧密附着在Fe2O3表面且二者之间存在稳定的相互作用,SEM表征结果显示Fe2O3-CQDs封堵材料的平均粒径约为200 nm,TG表征结果显示该材料的热分解温度不低于344℃。将Fe2O3-CQDs封堵材料加入柴油基钻井液中进行初步评价,发现添加质量分数4%封堵材料的油基钻井液在220℃老化16 h后的高温高压滤失量由8.2 mL降低至4 mL,滤饼厚度由5.0 mm降至1.5 mm,具有优异的降滤失与封堵性能。 展开更多
关键词 钻井液 封堵材料 Fe2O3 CQDs
暂未订购 下载PDF
超临界流体干燥法制备TiO_2/Fe_2O_3和TiO_2/Fe_2O_3/SiO_2复合纳米粒子及光催化性能 认领 引用 被引量：19
3
作者 张敬畅 李青 曹维良 《复合材料学报》 EI CAS 北大核心 2005年第1期79-84,共6页
　以TiCl4、Fe(NO3)3·9H2O和Na2SiO3 9H2O为原料,采用溶胶凝胶法结合超临界流体干燥法(SCFD)制备了纳米级TiO2/Fe2O3和TiO2/Fe2O3/SiO2复合光催化剂。以光催化降解苯酚对所得催化剂的催化活性进行了评价。结果表明,纳米TiO2/Fe2O3... 　以TiCl4、Fe(NO3)3·9H2O和Na2SiO3 9H2O为原料,采用溶胶凝胶法结合超临界流体干燥法(SCFD)制备了纳米级TiO2/Fe2O3和TiO2/Fe2O3/SiO2复合光催化剂。以光催化降解苯酚对所得催化剂的催化活性进行了评价。结果表明,纳米TiO2/Fe2O3复合粒子与单组分TiO2比较,复合粒子光催化活性高于单组分的TiO2,6h苯酚降解率高达95 9%。SiO2的加入可以抑制纳米粒子粒径的长大和晶相的转变,增强TiO2纳米粒子的热稳定性。复合光催化剂中Fe2O3最佳掺入量为0 06%,SiO2最佳掺入量为10%(摩尔分数)。并用XRD、TEM和FTIR等手段进行了表征。TiO2以锐钛矿型形式存在,SiO2以无定性形式存在。比较了不同制备方法制得的TiO2/Fe2O3复合光催化剂,得出超临界干燥法制备的光催化剂具有粒径小、比表面积大、分散性好、光催化活性高等特点。采用超临界流体干燥可直接得锐钛型纳米复合光催化剂。 展开更多
关键词 TiO2/Fe2O3 TiO2/Fe2O3/SiO2 纳米粒子 光催化 超临界流体干燥
暂未订购 下载PDF
Fe基分子筛催化剂应用于NH3选择性催化还原和N2O直接催化分解反应的研究进展 认领 引用 被引量：1
4
作者 明淑君 李新楠 +4 位作者 庞磊 苏长罗 程春晖 杨小东 李涛 《低碳化学与化工》 CAS 北大核心 2025年第6期97-112,共16页
柴油车排放的氮氧化物(NOx)和氧化亚氮(N2O)对人类健康和生态环境造成了显著危害。NH3选择性催化还原(NH3-SCR)技术是当前控制柴油车尾气中NOx排放的有效方法之一,而N2O的直接催化分解(简称“N2O分解”)则被认为... 柴油车排放的氮氧化物(NOx)和氧化亚氮(N2O)对人类健康和生态环境造成了显著危害。NH3选择性催化还原(NH3-SCR)技术是当前控制柴油车尾气中NOx排放的有效方法之一,而N2O的直接催化分解(简称“N2O分解”)则被认为是减少N2O排放的最具潜力的技术。这两种技术的核心均依赖于催化剂的开发与应用。Fe基分子筛催化剂在NH3-SCR和N2O分解反应中展现出了卓越的催化性能,为实现NOx和N2O的同步高效去除提供了一条有前途的路径。综述了Fe基分子筛催化剂在NH3-SCR和N2O分解反应中的催化机理,探讨了Fe基分子筛催化剂的制备方法、拓扑结构、助剂金属掺杂,以及反应环境中共存气体对其理化性质、NH3-SCR活性和N2O分解性能的影响。具体而言,Fe基分子筛催化剂的Fe物种形成与分布受到制备方法和分子筛拓扑结构的显著影响。助剂金属的引入不仅能够增大催化剂的酸性位点含量,还能改善Fe物种的分散性,从而优化其催化性能。此外,共存气体(如NO、O2和H2O)对Fe基分子筛催化剂的N2O分解活性产生不同程度的影响。最后,对Fe基分子筛催化剂的未来研究方向进行了展望,并对催化剂设计优化与性能提升提出了建议。 展开更多
关键词 Fe基分子筛催化剂 NH3-SCR N2O直接催化分解 催化机理
暂未订购 下载PDF
磁性纳米TiO_2/SiO_2/Fe_3O_4光催化剂的制备及表征 认领 引用 被引量：43
5
作者 廖振华 陈建军 +2 位作者 姚可夫 赵方辉 李荣先 《无机材料学报》 SCIE EI CAS 北大核心 2004年第4期749-754,共6页
以纳米Fe3O4磁粉为核心,采用溶胶-凝胶法制备了TiO2/SiO2/Fe3O4复合光催化剂。用XRD、TEM及元素分析对其结构和表面形貌进行了表征。以具有偶氮染料结构的甲基橙水溶液为目标反应物,评价其光催化活性。结果表明,所制TiO2/SiO2/Fe3O4样... 以纳米Fe3O4磁粉为核心,采用溶胶-凝胶法制备了TiO2/SiO2/Fe3O4复合光催化剂。用XRD、TEM及元素分析对其结构和表面形貌进行了表征。以具有偶氮染料结构的甲基橙水溶液为目标反应物,评价其光催化活性。结果表明,所制TiO2/SiO2/Fe3O4样品为双层包覆型结构,SiO2为中间层,最外层是锐钛矿型的TiO2。该复合光催化剂对甲基橙溶液有较高的光催化活性,并具有可利用其磁性回收重用的特点,应用前景广泛。 展开更多
关键词 TiO2/SiO2/Fe3O4 包覆 磁性 光催化
暂未订购 下载PDF
Fe3+-TiO_2/SiO_2薄膜催化剂的结构对其光催化性能影响 认领 引用 被引量：44
6
作者 付宏刚 王建强 +4 位作者 任志宇 闫鹏飞 于海涛 辛柏福 袁福龙 《高等学校化学学报》 SCIE EI CAS 北大核心 2003年第9期1671-1676,共6页
以硅胶为载体,采用溶胶-凝胶法制备了掺杂不同量Fe3+的TiO_2光催化剂(Fe3+-TiO_2/SiO_2),以氙灯为光源,罗丹明B为目标降解物,对其光催化活性进行了研究。结果表明,Fe3+-TiO_2/SiO_2比TiO_2纳米粉有更好的催化活性,Fe3+的最... 以硅胶为载体,采用溶胶-凝胶法制备了掺杂不同量Fe3+的TiO_2光催化剂(Fe3+-TiO_2/SiO_2),以氙灯为光源,罗丹明B为目标降解物,对其光催化活性进行了研究。结果表明,Fe3+-TiO_2/SiO_2比TiO_2纳米粉有更好的催化活性,Fe3+的最佳掺入量为0.03％。罗丹明B在粉体和膜催化剂的作用下遵循不同的光催化反应机理。根据XRD,SEM,Raman,XPS和FTIR的表征结果可认为,TiO_2在SIO_2表面薄膜化和Ti-O-Si键的形成是催化活性提高和降解机理不同的主要原因。 展开更多
关键词 Fe3+-TiO2/SiO2薄膜 催化剂 结构 光催化性能 溶胶-凝胶法 制备 二氧化钛
暂未订购 下载PDF
Fe3+/TiO_2/SiO_2复合纳米微粒的合成及光催化降解NO_2^- 认领 引用 被引量：53
7
作者 金华峰 李文戈 +1 位作者 向纪明 唐吉玉 《应用化学》 CAS 北大核心 2001年第8期636-639,共4页
采用溶胶 -凝胶法制备了 Ti O2 / Si O2 和不同浓度 Fe3+掺杂的 Fe3+ / Ti O2 / Si O2 复合纳米粉末 ,并利用XRD、BET、UV-vis等手段研究了 Ti O2 / Si O2 及掺铁形成的 Fe3+ / Ti O2 / Si O2 复合微粒的表面结构形态变化 ,以及对污染物... 采用溶胶 -凝胶法制备了 Ti O2 / Si O2 和不同浓度 Fe3+掺杂的 Fe3+ / Ti O2 / Si O2 复合纳米粉末 ,并利用XRD、BET、UV-vis等手段研究了 Ti O2 / Si O2 及掺铁形成的 Fe3+ / Ti O2 / Si O2 复合微粒的表面结构形态变化 ,以及对污染物 NO- 2 光催化降解的影响 .结果表明 ,Fe3+ / Ti O2 / Si O2 (ω( Fe3+ ) =1 .5 % ,m( Ti)∶ m( Si) =2∶ 1 )具有最佳活性 ,样品呈晶化度较低的锐钛矿结构 .Fe3+ 掺杂导致晶粒的增大 ,稳定性降低 ,大大提高了半导体的光催化活性 ,有利于对低浓度 NO- 2 展开更多
关键词 Fe^3+/TiO2/SiO2 TiO2/SiO2 复合微粒 光降解 NO2- 纳米粉末 催化活性 环境污染物 二氧化钛 二氧化硅 铁掺杂 亚硝酸根
暂未订购 下载PDF
Effect of Fe_2O_3 on non-isothermal crystallization of CaO-MgO-Al_2O_3-SiO_2 glass 认领 引用 被引量：10
8
作者 郁青春 燕春培 +3 位作者 邓勇 冯月斌 刘大春 杨斌 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2015年第7期2279-2284,共6页
The crystallization behavior and kinetics of CaO-MgO-Al2O3 SiO2（CMAS） glass with the Fe2O3 content ranging from zero to 5%were investigated by differential scanning calorimetry（DSC）.The structure and phase analyse... The crystallization behavior and kinetics of CaO-MgO-Al2O3 SiO2（CMAS） glass with the Fe2O3 content ranging from zero to 5%were investigated by differential scanning calorimetry（DSC）.The structure and phase analyses were made by Fourier transform infrared spectroscopy（FT-IR） and X-ray diffraction（XRD）.The experiment results show that the endothermic peak temperature about 760℃ is associated with transition and the exothermic peak temperature about 1000℃ is associated with crystallization.The crystallization peak temperature decreases with increasing the Fe203 content.The crystallization mechanism is changed from two-dimensional crystallization to one-dimensional growth,and the intensity of diopside peaks becomes stronger gradually.There is a saltation for the crystallization temperature with the addition of 0.5%Fe2O3 due to the decomposition of Fe2O3.Si-O-Si,O-Si-O and T-O-T（T=Si,Fe,Al） linkages are observed in Fe2O3-CaO-MgO-Al2O3-SiO2 glass. 展开更多
关键词 CaO-MgO-Al2O3-SiO2 glass Fe2O3 diopside crystallization kinetics
暂未订购 下载PDF
Experimental investigation into Fe3O4/SiO2 nanoparticle performance and comparison with other nanofluids in enhanced oil recovery 认领 引用 被引量：4
9
作者 Yousef Kazemzadeh Behnam Dehdari +2 位作者 Zahra Etemadan Masoud Riazi Mohammad Sharifi 《Petroleum Science》 SCIE CAS CSCD 2019年第3期578-590,共13页
Nanofluids because of their surface characteristics improve the oil production from reservoirs by enabling different enhanced recovery mechanisms such as wettability alteration,interfacial tension(IFT)reduction,oil vi... Nanofluids because of their surface characteristics improve the oil production from reservoirs by enabling different enhanced recovery mechanisms such as wettability alteration,interfacial tension(IFT)reduction,oil viscosity reduction,formation and stabilization of colloidal systems and the decrease in the asphaltene precipitation.To the best of the authors’ knowledge,the synthesis of a new nanocomposite has been studied in this paper for the first time.It consists of nanoparticles of both SiO2 and Fe3O4.Each nanoparticle has its individual surface property and has its distinct effect on the oil production of reservoirs.According to the previous studies,Fe3O4 has been used in the prevention or reduction of asphaltene precipitation and SiO2 has been considered for wettability alteration and/or reducing IFTs in enhanced oil recovery.According to the experimental results,the novel synthesized nanoparticles have increased the oil recovery by the synergistic effects of the formed particles markedly by activating the various mechanisms relative to the use of each of the nanoparticles in the micromodel individually.According to the results obtained for the use of this nanocomposite,understanding reservoir conditions plays an important role in the ultimate goal of enhancing oil recovery and the formation of stable emulsions plays an important role in oil recovery using this method. 展开更多
关键词 Enhanced oil recovery Asphaltene precipitation Wettability alteration Interfacial tension reduction Fe3O4/SiO2 nanofluid
暂未订购 下载PDF
Fe_3O_4@SiO_2@mTiO_2介孔多功能纳米复合颗粒的制备及载药能力 认领 引用 被引量：4
10
作者 彭红霞 胡传跃 +2 位作者 吴腾宴 胡继林 田修营 《无机化学学报》 SCIE CAS CSCD 北大核心 2016年第7期1154-1160,共7页
以溶剂热法制备氨基功能化的Fe_3O_4纳米颗粒为磁核,结合溶胶-凝胶法和模板法在其表面先后包覆上致密的SiO_2层和介孔TiO_2层,制备了磁性-发光-微波热转换性-介孔结构为一体的多功能核-壳结构纳米复合颗粒,并对其结构、性能及载药能力... 以溶剂热法制备氨基功能化的Fe_3O_4纳米颗粒为磁核,结合溶胶-凝胶法和模板法在其表面先后包覆上致密的SiO_2层和介孔TiO_2层,制备了磁性-发光-微波热转换性-介孔结构为一体的多功能核-壳结构纳米复合颗粒,并对其结构、性能及载药能力进行了研究。XRD分析表明:Fe_3O_4表面包覆上了无定形结构的SiO_2和TiO_2。TEM照片表明:所得的纳米复合颗粒具有明显的核壳结构和完美的球形,构成核的Fe_3O_4颗粒的尺寸在40~50 nm之间,Fe_3O_4@SiO_2@mTiO_2核壳结构纳米复合颗粒的尺寸为60~70 nm,壳层厚度约10 nm,并可观察到壳层中清晰的孔状结构。磁性、荧光光谱和微波热转换特性分析表明:该复合颗粒同时具有良好的发光性、磁性和微波热转换特性。N_2气吸附及药物负载率分析表明,该复合颗粒具有较高的比表面积(640 m^2·g-1)和介孔结构(孔径约2.8 nm)并且具有较高的药物负载率。 展开更多
关键词 Fe3O4@SiO2@mTiO2 介孔 磁性 荧光性 微波热转换性 药物负载
暂未订购 下载PDF
Preparation and photocatalytic activity of Fe3O4@SiO2@ZnO:La 认领 引用 被引量：5
11
作者 Xiaowei Lv Wenyi Huang +6 位作者 Xingcheng Ding Jiangwei He Qiumei Huang Jialin Tan Hao Cheng Jun Feng Lijun Li 《Journal of Rare Earths》 SCIE EI CAS CSCD 2020年第12期1288-1296,共9页
In this study,Fe3 O4@SiO2@ZnO:La microspheres were successfully prepared.The microspheres have the advantages of both ZnO doped with La and the Fe3 O4@SiO2 structure such that the former improves the photocatalytic ac... In this study,Fe3 O4@SiO2@ZnO:La microspheres were successfully prepared.The microspheres have the advantages of both ZnO doped with La and the Fe3 O4@SiO2 structure such that the former improves the photocatalytic activity of ZnO and the latter can be reused.The X-ray diffraction(XRD),a field emission scanning electron microscope(SEM),a field emission transmission electron microscope(TEM),X-ray photoelectron spectroscopy(XPS),and a vibrating sample magnetometer(VSM)were used to characterize Fe3 O4@SiO2@ZnO:La microspheres.Methyl orange was used as the model molecule to study the effect of the Zn2+concentration and the doping amount of La on the photocatalytic activity of Fe3 O4@SiO2@ZnO:La microspheres.Results show that in the synthesis of Fe3 O4@SiO2@ZnO:La microspheres,photocatalytic activity of the microspheres is enhanced first and weakened later with the increase of Zn2+concentration.In the La doping process,the photocatalytic activity of Fe3 O4@SiO2@ZnO:La microspheres is enhanced with the increase in the La doping amount.The magnetic photocatalysts not only have high photocatalytic activity,but also can be reused.After being reused five times,the photocatalyst’s degradation rate of methyl orange is still as high as 81%,which shows that magnetic photocatalysts have prospective wider applications in photocatalytic degradation of dye wastewater. 展开更多
关键词 Fe3O4@SiO2 ZnO:La Photocatalysis Reuse Rare earths
暂未订购 下载PDF
The Preparation and Gas-sensing Property of Nanosize γ-Fe_2O_3/SiO_2 认领 引用 被引量：3
12
作者 马丽景 闫涛 +4 位作者 白守礼 黄小葳 宋永吉 陈霭璠 LIU Chung Chium 《Chinese Journal of Chemical Engineering》 SCIE EI CAS 2004年第2期282-285,共4页
Nanostructured γ-Fe2O3/SiO2 complex oxide was prepared by sol-gel method with tetraethoxysilane and iron nitrate as precursors. The particle size distribution, thermal and phase stabilities and gas sensing properties... Nanostructured γ-Fe2O3/SiO2 complex oxide was prepared by sol-gel method with tetraethoxysilane and iron nitrate as precursors. The particle size distribution, thermal and phase stabilities and gas sensing properties were systematically characterized by TEM, granularity distribution, TG-DTA, XRD and gas sensitivity measurements. The particle size is about 10 nm and size distribution is very narrow. The sensitivity of the sensing element to CO, H2, C2H4, C6H6 and the effects of calcination temperature on the sensitivity and conductance of gases were examined. The combination of excellent thermal stability and tunable gas sensing properties through careful control of the preparation and judicious selection of material compositions gives rise to novel nanocomposites, which is attractive for the sensitive and selective detection of reducing gases and some hydrocarbon gases. 展开更多
关键词 nanostructural composites Fe2O3 SiO2 gas-sensing properties
暂未订购 下载PDF
磁载光催化剂TiO_2/SiO_2/γ-Fe_2O_3的制备及其催化氧化性能 认领 引用 被引量：6
13
作者 包淑娟 张校刚 刘献明 《功能材料》 EI CAS 北大核心 2004年第1期108-110,113,共3页
　采用化学共沉淀法制备磁基体(Fe3O4),煅烧使其转化为γ Fe2O3。溶胶 凝胶法成功得到易于固液分离回收的磁载TiO2光催化剂TiO2/SiO2/γ Fe2O3。用TEM和XRD进行形貌和物相表征。研究了催化剂对可溶性染料Orange Ⅱ的降解性能,并探讨了... 　采用化学共沉淀法制备磁基体(Fe3O4),煅烧使其转化为γ Fe2O3。溶胶 凝胶法成功得到易于固液分离回收的磁载TiO2光催化剂TiO2/SiO2/γ Fe2O3。用TEM和XRD进行形貌和物相表征。研究了催化剂对可溶性染料Orange Ⅱ的降解性能,并探讨了煅烧温度、时间对活性的影响。结果表明:最佳煅烧温度为450℃,最佳煅烧时间为30min。这种情况下得到的磁载TiO2光催化剂TiO2/SiO2/γ Fe2O3,在3次循环使用后降解率仍保持在95%以上。 展开更多
关键词 磁载 光催化剂 化学共沉淀法 制备 催化氧化性能 TiO2/SiO2/γ-Fe2O3
暂未订购 下载PDF
Influence of refining process and utilization of different slags on inclusions, titanium yield and total oxygen content of Ti-stabilized 321 stainless steel 认领 引用 被引量：5
14
作者 Xing-run Chen Guo-guang Cheng +2 位作者 Yu-yang Hou Jing-yu Li Ji-xiang Pan 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2020年第8期913-921,共9页
Ti-stabilized 321 stainless steel was prepared using an electric arc furnace, argon oxygen decarburization (AOD) furnace, ladle furnace (LF), and continuous casting processes. In addition, the effect of refining proce... Ti-stabilized 321 stainless steel was prepared using an electric arc furnace, argon oxygen decarburization (AOD) furnace, ladle furnace (LF), and continuous casting processes. In addition, the effect of refining process and utilization of different slags on the evolution of inclusions, titanium yield, and oxygen content was systematically investigated by experimental and thermodynamic analysis. The results reveal that the total oxygen content (TO) and inclusion density decreased during the refining process. The spherical CaO–SiO2–Al2O3–MgO inclusions existed in the 321 stainless steel after the AOD process. Moreover, prior to the Ti addition, the spherical CaO–Al2O3–MgO–SiO2 inclusions were observed during LF refining pro-cess. However, Ti addition resulted in multilayer CaO–Al2O3–MgO–TiOx inclusions. Two different samples were prepared by conventional CaO–Al2O3-based slag (Heat-1) and -TiO2-rich CaO–Al2O3-based slag (Heat-2). The statistical analysis revealed that the density of inclusions and the -TiOx content in CaO–Al2O3–MgO–TiOx inclusions found in Heat-2 sample are much lower than those in the Heat-1 sample. Furthermore, the TO content and Ti yield during the LF refining process were controlled by using -TiO2-rich calcium aluminate synthetic slag. These results were consistent with the ion–molecule coexist-ence theory and FactSage?7.2 software calculations. When -TiO2-rich CaO–Al2O3-based slag was used, the -TiO2 activity of the slag increased, and the equilibrium oxygen content significantly decreased from the AOD to LF processes. Therefore, the higher -TiO2 activity of slag and lower equilibrium oxygen content suppressed the undesirable reactions between Ti and O. 展开更多
关键词 321 Austenitic stainless steel Oxygen content Inclusion TiO2-rich CaO–Al2O3-based slag Ladle furnace(LF)refining process Ion–molecule coexistence theory
暂未订购 下载PDF
Fe3+掺杂Fe_3O_4@SiO_2@TiO_2型光催化剂的制备及其光催化性能 认领 引用 被引量：8
15
作者 焦琳娟 李永豪 吴晓莹 《化学研究与应用》 CAS CSCD 北大核心 2018年第9期1416-1422,共7页
采用溶胶-凝胶法制备了0. 35mol%Fe3+掺杂Fe_3O_4@SiO_2@TiO_2新型复合光催化剂,并对其进行表征和光催化活性的研究。结果表明,在掺杂度为0. 35mol%,钛酸四丁酯和Fe_3O_4@SiO_2的用量为9mL:0. 5g(v:m),450℃煅烧4. 0h时光催化性能最... 采用溶胶-凝胶法制备了0. 35mol%Fe3+掺杂Fe_3O_4@SiO_2@TiO_2新型复合光催化剂,并对其进行表征和光催化活性的研究。结果表明,在掺杂度为0. 35mol%,钛酸四丁酯和Fe_3O_4@SiO_2的用量为9mL:0. 5g(v:m),450℃煅烧4. 0h时光催化性能最好。新型复合光催化剂具有良好的磁分离特性,与纯TiO_2相比,吸收光区明显红移,吸光能力增强,能快速降解有机污水,5次循环使用后回收率为90%以上,降解率为85%以上,可显著降低二次污染和催化剂的使用成本,具有开发价值。 展开更多
关键词 0.35mol%Fe^3+掺杂Fe3O4@SiO2@TiO2 复合光催化剂 磁性 光催化活性 甲基对硫磷
暂未订购 下载PDF
Concentration and annealing effect on PL properties of sol-gel derived SiO_2-Y_2O_3:Eu3+ nanocomposites 认领 引用 被引量：2
16
作者 王忆 曾庆光 +3 位作者 胡社军 吴坤彬 蒋俊宏 陈根廷 《Journal of Rare Earths》 SCIE EI CAS 2010年第2期176-180,共5页
An improved sol-gel method was employed to prepare Eu3+ ions doped SiO2-Y2O3 nanocomposites.Systematic study was carried out on the effect of post-annealing treatment on photoluminescence(PL) properties of the samples... An improved sol-gel method was employed to prepare Eu3+ ions doped SiO2-Y2O3 nanocomposites.Systematic study was carried out on the effect of post-annealing treatment on photoluminescence(PL) properties of the samples under various europium ions doping concentrations.X-ray diffraction(XRD) patterns indicated that the samples showed an amorphous matrix structure,and the scanning electron microscopy(SEM) pictures showed that the samples presented a nano size(from 21 to 42 nm) granular-stack structure after hi... 展开更多
关键词 Eu3+doped SiO2-Y2O3 glass photoluminescence（PL） nanocomposites rare earths
暂未订购 下载PDF
Enhanced photocatalytic degradation of sulfadiazine by Fe3+ in aqueous TiO_2 suspension 认领 引用 被引量：2
17
作者 张军伟 傅大放 +2 位作者 杨丽莉 邓琳 孙越 《Journal of Southeast University(English Edition)》 EI CAS 2011年第3期275-279,共5页
In order to explore the reaction mechanism of Fe^3＋ and the mineralization effect of the micropollutant, Fe^3＋ assisted photocatalytic oxidation of sulfadiazine （SD） in the TiO2 suspended solution is investigated.... In order to explore the reaction mechanism of Fe^3＋ and the mineralization effect of the micropollutant, Fe^3＋ assisted photocatalytic oxidation of sulfadiazine （SD） in the TiO2 suspended solution is investigated. The effect of Fe^3＋ participation, the degradation kinetics of SD, the effect of SD mineralization and the possible mechanism of Fe^3＋ participation in TiO2 suspension are analyzed by adding FeCl3, taking samples at a given time and determining the SD concentration. Results indicate that the degradation of SD catalyzed by TiO2/ Fe^3＋ is faster than that catalyzed by TiO2 or Fe^3＋ separately. The photocatalytic degradation of SD follows the pseudo-first- order kinetics model in a range of 20 to 80 mg/L of initial concentration. The mineralization rate of SD can be enhanced by the addition of Fe^3＋ in the TiO2 suspended solution. The mechanism of the rapid degradation of SD is proposed, which indicates that Fe^3＋ adsorbed on the surface of TiO2 particles acts as an electron acceptor. The amount of recombining electronhole pairs decreases, and the amount of hydroxyl radicals increases. The increased hydroxyl radical strengthens the degradation of SD in the TiO2/Fe^3＋ suspended solution. 展开更多
关键词 TiO2 photocatalytic degradation sulfadiazine Fe3 ＋ enhancement
暂未订购 下载PDF
Construction of SiO2-TiO2/g-C3N4 composite photocatalyst for hydrogen production and pollutant degradation: Insight into the effect of SiO2 认领 引用 被引量：1
18
作者 Sijia Sun Hao Ding +5 位作者 Lefu Mei Ying Chen Qiang Hao Wanting Chen Zhuoqun Xu Daimei Chen 《Chinese Chemical Letters》 SCIE CAS CSCD 2020年第9期2287-2294,共8页
Using low-cost precipitated silica(SiO2) as the carrier,a ternary SiO2-TiO2/g-C3N4 composite photocatalyst was prepared via the sol-gel method associated with a wet-grinding process.The asprepared composite exhibits p... Using low-cost precipitated silica(SiO2) as the carrier,a ternary SiO2-TiO2/g-C3N4 composite photocatalyst was prepared via the sol-gel method associated with a wet-grinding process.The asprepared composite exhibits photocatalytic hydrogen production and pollutant degradation performance under solar-like irradiation.The effect of SiO2 carrier on the properties of the heterostructure between TiO2 and g-C3N4(CN) was systematically studied.It is found that SiO2 has important effects on promoting the interaction between TiO2 and CN.The particle size of TiO2 and CN was obviously reduced during the calcination process due to the effects of SiO2.Especially,the TiO2 particles exhibit monodispersed state with particle size below 10 nm(quantum dots),resulting in the improvement of the contact area and the interaction betweenTiO2 and CN,and leading to the formation of efficient TiO2/CN Zscheme heterostructure in SiO2-TiO2/CN.Besides,the introduction of SiO2 can increase the specific surface area and light absorption of SiO2-TiO2/CN,further promoting the photocatalytic reaction.As expected,the optimum SiO2-TiO2/CN composite exhibits 12.3,3.1 and 2.9 times higher photocatalytic hydrogen production rate than that of SiO2-TiO2,CN and TiO2/CN under solar-like irradiation,while the photocatalytic active component in SiO2-TiO2/CN is only about 60 wt%.Moreover,the rhodamine B degradation rate of SiO2-TiO2/CN is also higher than that of SiO2-TiO2,CN and TiO2/CN. 展开更多
关键词 SiO2 carrier Heterostructure Photocatalyst g-C3N4 TiO2
暂未订购 下载PDF
Optimization of the operating conditions in a TiO_2/Fe_3O_4-SiO_2 photocatalytic reactor for the treatment of industrial wastewater containing Procion Red MX-5B 认领 引用 被引量：1
19
作者 王爱杰 周爱娟 +2 位作者 王丽燕 刘敏 陈兆波 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2011年第2期1-7,共7页
According to the design principle of the central composite experimental,the method of response surface analysis with three factors and three levels was adopted based on one factor test.A second-order quadratic equatio... According to the design principle of the central composite experimental,the method of response surface analysis with three factors and three levels was adopted based on one factor test.A second-order quadratic equation for photocatalysis of Procion Red MX-5B was built.Response surface and contour were graphed with the decoloration rate of Procion Red MX-5B as the response value.Based on the analysis of the response surface plots and their corresponding contour plots,effects of pH value,irradiation time and catalyst loading were explored.By using this new method,the optimum decoloration condition was obtained as follows:pH value,1.3;irradiation time,49.9 min;catalyst loading,0.57 g/L.In the optimization,R-Squared and Adj R-Squared correlation coefficients for quadratic model were evaluated quite satisfactorily as 0.9310 and 0.8620,respectively.Under the optimum conditions established,the performance of 99.47% for color removal was experimentally reached.It was found that all factors considered have an important effect on the decolorization efficiency of Procion Red MX-5B.By the ANOVA analysis and model confirmation the optimal solution obtained using RSM was experimentally validated and credible with preferable instructional ability for experiments. 展开更多
关键词 TiO2/Fe3O4-SiO2 photocatalyst response surface methodology(RSM) optimization of decoloration condition
暂未订购 下载PDF
ICP-AES法测定FeSiB非晶合金炉渣中Al_2O_3、B_2O_3、CaO、MgO、MnO、SiO_2和TiO_2 认领 引用 被引量：2
20
作者 冯圣雅 王瑶 +2 位作者 李艳萍 高光洁子 曹枨 《金属功能材料》 CAS 2015年第1期44-47,共4页
建立了电感耦合等离子体原子发射光谱法同时测定FeSiB非晶合金炉渣中Al2O3、B2O3、CaO、MgO、MnO、SiO2和TiO2的方法。用HNO3＋HCl＋HF处理样品,选择仪器的最佳分析参数和分析条件,采用基体匹配的方法消除基体干扰。该方法Al、B、Ca、Mg... 建立了电感耦合等离子体原子发射光谱法同时测定FeSiB非晶合金炉渣中Al2O3、B2O3、CaO、MgO、MnO、SiO2和TiO2的方法。用HNO3＋HCl＋HF处理样品,选择仪器的最佳分析参数和分析条件,采用基体匹配的方法消除基体干扰。该方法Al、B、Ca、Mg、Mn、Si和Ti的检出限分别为0.041、0.054、0.016、0.009、0.004、0.098、0.01μg/mL。用该方法对FeSiB非晶合金炉渣分析样品进行了测定,其测定结果（n=11）的相对标准偏差均小于2%,加标回收率为100.1%~105.8%。 展开更多
关键词 电感耦合等离子体原子发射光谱法 FeSiB非晶合金炉渣 Al2O3、B2O3、CaO、MgO、MnO、SiO2和TiO2
暂未订购 下载PDF
已选0条
引用分析
参考文献
引证文献
 统计分析
检索结果
已选文献
上一页 1 2 … 159 下一页 到第 页
在线咨询 使用帮助 返回顶部 意见反馈