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磁载光催化剂Ag-TiO_2/ZnO/γ-Fe_2O_3的制备及其光催化性能 认领 引用 被引量：8
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作者 侯林瑞 原长洲 彭秧 《应用化学》 CAS 北大核心 2006年第11期1278-1281,共4页
采用溶胶-凝胶法在表面包覆了ZnO的磁基体γ-Fe2O3上负载TiO2,光催化还原法在其表面沉积Ag,得到了易于磁性固液分离的磁载Ag-TiO2/ZnO/γ-Fe2O3复合光催化剂。通过XRD、EDX和TEM等测试技术对该复合催化剂进行了表征。以可溶性染料亚甲... 采用溶胶-凝胶法在表面包覆了ZnO的磁基体γ-Fe2O3上负载TiO2,光催化还原法在其表面沉积Ag,得到了易于磁性固液分离的磁载Ag-TiO2/ZnO/γ-Fe2O3复合光催化剂。通过XRD、EDX和TEM等测试技术对该复合催化剂进行了表征。以可溶性染料亚甲基兰为降解对象,研究了ZnO的存在和Ag不同含量对复合光催化剂催化活性的影响及催化剂回收再利用的可行性。结果表明,0.5%(质量分数)Ag-TiO2/ZnO/γ-Fe2O3(其中m(TiO2)∶m(ZnO)∶m(γ-Fe2O3)=14∶3∶3)的复合光催化剂具有最高的光催化活性,在3次循环使用后仍能保持较好的光催化性能。 展开更多
关键词 磁载光催化剂 制备 Ag-TiO2/ZnO/γ-Fe2O3 亚甲基兰
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B2O3对Li2O-ZnO-Al2O3-SiO2微晶玻璃结构与析晶行为的影响 认领 引用
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作者 温中源 李路瑶 +1 位作者 王静 韩建军 《硅酸盐通报》 CAS 北大核心 2025年第12期4546-4556,4591,共11页
透明微晶玻璃因优异的光学性能与力学性能被广泛用于智能终端和穿戴领域,其性能与玻璃相中纳米晶的种类、含量、尺寸、分布等紧密相关。通过熔融-热处理法制备了Li2O-ZnO-Al2O3-SiO2(LZAS)透明微晶玻璃,研究了B2O3含... 透明微晶玻璃因优异的光学性能与力学性能被广泛用于智能终端和穿戴领域,其性能与玻璃相中纳米晶的种类、含量、尺寸、分布等紧密相关。通过熔融-热处理法制备了Li2O-ZnO-Al2O3-SiO2(LZAS)透明微晶玻璃,研究了B2O3含量对玻璃结构演化、析晶行为及性能的影响。结果表明,随着玻璃中B2O3含量从1%(摩尔分数,下同)增加到5%,玻璃内的[BO4]逐渐向[BO3]转变,并在B2O3含量为3%~5%时,[BO3]比例稳定在约49%。B2O3含量为1%~3%的玻璃在760℃晶化后倾向于表面析晶,B2O3含量不低于4%的玻璃在780℃晶化后,微晶玻璃内部析出分布均匀的球形晶体,增加B2O3含量降低了体析晶所需的晶化温度。其中,含4%B2O3的玻璃经760℃晶化后制得的微晶玻璃样品的透过率为65%,维氏硬度达到(6.77±0.07) GPa,弯曲强度为(172.7±8.1) MPa。 展开更多
关键词 B2O3 微晶玻璃 Li2O-ZnO-Al2O3-SiO2 β-石英固溶体 析晶动力学 维氏硬度
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Photoluminescence behavior and visible light photocatalytic activity of ZnO,ZnO/ZnS and ZnO/ZnS/α-Fe_2O_3 nanocomposites 认领 引用 被引量：7
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作者 Gaurav HITKARI Sandhya SINGH Gajanan PANDEY 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2018年第7期1387-1397,共11页
In order to achieve effective, economic, and easily achievable photocatalyst for the degradation of dye methyl orange（MeO）, ZnO, ZnO/ZnS and ZnO/ZnS/α-Fe2O3 nanocomposites were prepared by simple chemical synthetic... In order to achieve effective, economic, and easily achievable photocatalyst for the degradation of dye methyl orange（MeO）, ZnO, ZnO/ZnS and ZnO/ZnS/α-Fe2O3 nanocomposites were prepared by simple chemical synthetic route in the aqueous medium. Phase, crystallinity, surface structure and surface behavior of the synthesized materials were determined by X-ray diffraction（XRD） and Brunauer-Emmett-Teller analysis（BET） techniques. XRD study established formation of good crystalline ZnO, ZnO/ZnS and ZnO/ZnS/α-Fe2O3 nanomaterials. By using intensity of constituent peaks in the XRD pattern, the compositions of nanocomposites were determined. From the BET analysis, the prepared materials show mesoporous behavior, type Ⅳ curves along with H4 hysteresis. The ZnO/ZnS/α-Fe2O3 composite shows the largest surface area among three materials. From the UV-visible spectra, the band gap energy of the materials was determined. Photoluminescence spectra（PL） were used to determine the emission behavior and surface defects in the materials. In PL spectra, the intensity of UV peak of ZnO/ZnS is lowered than that of ZnO while in case of ZnO/ZnS/α-Fe2O3, the intensity further decreased. The visible emission spectra of ZnO/ZnS increased compared with ZnO while in ZnO/ZnS/α-Fe2O3 it is further increased compared with ZnO/ZnS. The as-synthesized materials were used as photocatalysts for the degradation of dye MeO. The photo-degradation data revealed that the ZnO/ZnS/α-Fe2O3 is the best photocatalyst among three specimens for the degradation of dye MeO. The decrease of intensity of UV emission peak and the increase of intensity of visible emission cause the decrease of recombination of electrons and holes which are ultimately responsible for the highest photocatalytic activity of ZnO/ZnS/α-Fe2O3. 展开更多
关键词 nanocomposite ZnO ZnS α-Fe2O3 calcination optical properties photocatalytic activity
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棒状α-Fe_2O_3/ZnO复合物的制备及其光催化性能 认领 引用 被引量：3
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作者 谢娟 李美霞 +2 位作者 郝勇静 连一苇 夏慧莹 《化工新型材料》 CAS CSCD 北大核心 2016年第4期140-142,共3页
以硝酸锌(Zn(NO_3)_2)、硝酸铁(Fe(NO_3)_3)和氢氧化钠(NaOH)为原料,采用液相沸腾回流法制得了不同长径比的棒状α-Fe_2O_3异质复合ZnO光催化剂。用X射线衍射仪(XRD)、场发射扫描电子显微镜(FESEM)及紫外-可见漫反射光谱(UV-visDRS)等... 以硝酸锌(Zn(NO_3)_2)、硝酸铁(Fe(NO_3)_3)和氢氧化钠(NaOH)为原料,采用液相沸腾回流法制得了不同长径比的棒状α-Fe_2O_3异质复合ZnO光催化剂。用X射线衍射仪(XRD)、场发射扫描电子显微镜(FESEM)及紫外-可见漫反射光谱(UV-visDRS)等多种手段对产物进行表征。以"三致"污染物五氯酚为降解对象,考察了紫外-可见光照下样品的光催化效果。结果表明,棒状α-Fe_2O_3/ZnO复合光催化剂的性能与其α-Fe_2O_3的含量密切相关。当α-Fe_2O_3与ZnO的物质的量比为1∶5时,样品光催化活性最高,4h内即可将五氯酚降解完全。 展开更多
关键词 α-Fe2O3 ZnO 制备 光催化性能 五氯酚
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ZnO,ZnO-Fe_2O_3晶核剂对微晶玻璃显微结构的影响 认领 引用 被引量：5
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作者 徐晓虹 褚颖 +2 位作者 孙淑珍 邵建兵 陈安民 《硅酸盐通报》 CAS 2004年第3期24-27,共4页
分析了在K2O-MgO-CaO-SiO2-P2O5-F系统可切削微晶玻璃中,ZnO,ZnO与Fe2O3复合晶核剂对可切削微晶玻璃显微结构的影响。制备的3种试样组分是:一份基础组分,另两份分别添加了ZnO和ZnO-Fe2O3晶核剂。试样均在1400℃下保温1h熔制。根据差热... 分析了在K2O-MgO-CaO-SiO2-P2O5-F系统可切削微晶玻璃中,ZnO,ZnO与Fe2O3复合晶核剂对可切削微晶玻璃显微结构的影响。制备的3种试样组分是:一份基础组分,另两份分别添加了ZnO和ZnO-Fe2O3晶核剂。试样均在1400℃下保温1h熔制。根据差热结果制定了晶化温度制度。采用XRD和SEM分析了晶化样品相组成及显微结构。同时测定了试样的性能。结果表明:ZnO可促进玻璃晶化后形成具有晶粒长径比大,相互交织的框架状显微结构,有利于提高样品的强度和韧性。在ZnO与Fe2O3复合晶核剂共同作用下,晶核形成量增多,晶粒变小,抗拉强度及硬度增加,但切削性能降低。 展开更多
关键词 ZnO ZnO-Fe2O3 晶核剂 微晶玻璃 显微结构 析晶 晶化 强度 韧性 切削性能
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γ-Fe2O3纳米粒表面油酸的测定及对T1造影的影响 认领 引用
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作者 杨政 邓朗 +2 位作者 张彦 熊迎新 陈华黎 《医学诊断》 2025年第1期67-76,共10页
目的:检测γ-Fe2O3纳米粒表面油酸的残留量,考察油酸残留量对纳米粒磁共振T1造影效果的影响。方法:采用热分解法制备γ-Fe2O3纳米粒,使用mPEG-P取代γ-Fe2O3纳米粒表面的油酸,得到水溶性的γ-Fe2O3-PEG纳米粒,采用高效液相色谱法测定纳... 目的:检测γ-Fe2O3纳米粒表面油酸的残留量,考察油酸残留量对纳米粒磁共振T1造影效果的影响。方法:采用热分解法制备γ-Fe2O3纳米粒,使用mPEG-P取代γ-Fe2O3纳米粒表面的油酸,得到水溶性的γ-Fe2O3-PEG纳米粒,采用高效液相色谱法测定纳米粒表面残留的油酸,并在7T磁共振成像仪下考察油酸残留量与纳米粒T1造影效果的关联。最后,对体外造影效果最优的样品进行了体内磁共振成像测试。结果:建立了油酸的高效液相色谱检测方法,油酸在10~400 μg/mL浓度范围内具有良好的线性关系(r2 = 1),平均回收率为99.86%。通过改变γ-Fe2O3与mPEG-P的投料比,得到γ-Fe2O3-PEG纳米粒表面油酸残留个数分别为100、83、56、33的样品。体外磁共振成像结果表明,油酸残留量较少的纳米粒拥有更好的T1加权成像性能。小鼠体内血管造影显示,本研究制备的γ-Fe2O3-PEG纳米粒与临床使用的钆类造影剂相比,拥有更好的血管成像效果。结论:本研究成果为热分解法制备的氧化铁纳米粒表面油酸的定量分析提供了一种有效的检测方法,以促进该类纳米粒在生物医学领域的应用。Objective: Detection of residual oleic acid on the surface of γ-Fe2O3 nanoparticles and investigation of its impact on magnetic resonance T1 imaging. Method: We prepared γ-Fe2O3 nanoparticles via thermal decomposition, with mPEG-P replacing the oleic acid on the surface of the nanoparticles to yield water-soluble γ-Fe2O3-PEG nanoparticles. The residual oleic acid on the surface of the nanoparticles was quantified using High-Performance Liquid Chromatography, and the relationship between the amount of residual oleic acid and the T1 contrast effect of the nanoparticles was investigated using a 7T magnetic resonance imaging system. Finally, the vivo magnetic resonance imaging of the sample exhibiting the optimal in vitro contrast effect was conducted. Results: We developed a High-Performance Liquid Chromatography method for the detection of oleic acid, demonstrating a strong linear correlation in the concentration range of 10~400 μg/mL (r² = 1) with an average recovery rate of 99.86%. By varying the ratio of γ-Fe2O3 to mPEG-P, samples with oleic acid on the surface of γ-Fe2O3-PEG nanoparticles were obtained, with respective counts of 100, 83, 56, and 33. In vitro magnetic resonance imaging demonstrated that nanoparticles with lower residual oleic acid exhibited enhanced T1-weighted imaging performance. In vivo vascular imaging in mice demonstrated that the γ-Fe2O3-PEG nanoparticles prepared in this study provided better imaging results compared to commercially available gadolinium-based contrast agents. Conclusions: This study presents an effective detection method for the quantitative analysis of oleic acid on the surface of iron oxide nanoparticles synthesized via a thermolytic approach, thereby facilitating the application of such nanoparticles in the biomedical field. 展开更多
关键词 γ-Fe2O3 油酸 高效液相色谱法 磁共振成像
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Preparation and Characterization of Some Ferrites from CuO-ZnO-Fe_2O_3 Mixtures 认领 引用 被引量：2
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作者 A.A.Hanna H.I Saleh and M.Sh.Khalil 《Journal of Materials Science & Technology》 SCIE EI CAS 1998年第3期236-240,共5页
The ferrites of Cuo-ZnO-Fe2o3 solid solution series near the molar ratio of ZnxCu1-x were prepared by direct heating of their coprecipitated hydroxides using NH4OH as precipitating agent where x=0.0, 0.2, 0.5, 0.8 and... The ferrites of Cuo-ZnO-Fe2o3 solid solution series near the molar ratio of ZnxCu1-x were prepared by direct heating of their coprecipitated hydroxides using NH4OH as precipitating agent where x=0.0, 0.2, 0.5, 0.8 and 1.0. Additional amounts of Cu and Zn sulphates were added to compensate the loss during the coprecipitation of the hydroxides. The ferritized samples were characterized by chemical analysis, XRD. DTA, TGA and SEM. XRD of both Zn0.2Cu0.8Fe2O4 and Zn0.5Cu0.5 Fe2O4 that indicates the formation of a heterogeneous ferrite material of ZnFe2O4 and CuFe2O4 mixed with variable amounts of α-Fe2O3. Zn and Cu ferrites were observed only in Zn0.8Cu0.2Fe2O4.From TGA-time relation, the activation energy of the different transformation phases were calculated. It is found that, the activation energy of ZnFe2O4 is slightly equal to 3/2 of that for CuFe2O4. Dielectric measurements show that the electrical behaviour depends on the ordering and disordering of the phases. 展开更多
关键词 CuO ZnO Fe Preparation and Characterization of Some Ferrites from CuO-ZnO-Fe2O3 Mixtures
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SiO_2-FeO-Fe_2O_3-CaO-ZnO渣系中NFe3+/NFe2+与组元关系的研究 认领 引用
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作者 李运刚 陈国发 《有色金属（冶炼部分）》 CAS 1987年第5期29-32,共4页
SiO_2-FeO-Fe_2O_3-CaO-ZnO体系是火法炼铅的重要渣系。本文研究了该体系中NF2+/NFe2+与组元的关系,指出选择γPbO较大和Fe_3O_4含量较低的渣型是降低渣含铅的重要途径。
关键词 FeO SiO2-FeO-Fe2O3-CaO-ZnO Fe ZnO 组元 CaO 渣系
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含铅固废协同冶炼过程PbO-CaO-SiO2-Fe2O3-ZnO 五元渣系相平衡研究 认领 引用 被引量：2
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作者 罗羊 唐朝波 +3 位作者 陈永明 叶龙刚 杨声海 何静 《矿冶工程》 CAS CSCD 北大核心 2020年第1期88-91,100,共4页
在1000~1250℃范围内,采用高温平衡-淬冷-EDS方法研究了含铅固废协同冶炼过程PbO-CaO-SiO2-Fe2O3-ZnO五元渣系在空气气氛下的相平衡规律。研究结果表明,渣中存在的主要物相有尖晶石(ZnxFe3-yO4+z)、红锌矿(ZnO)、黄长石(PbvCa2-vZnwSi2... 在1000~1250℃范围内,采用高温平衡-淬冷-EDS方法研究了含铅固废协同冶炼过程PbO-CaO-SiO2-Fe2O3-ZnO五元渣系在空气气氛下的相平衡规律。研究结果表明,渣中存在的主要物相有尖晶石(ZnxFe3-yO4+z)、红锌矿(ZnO)、黄长石(PbvCa2-vZnwSi2O7)、赤铁矿(Fe2O3)、磁铁铅矿(PbFe10O16)和硅钙石(Ca2-tPbtSiO4)。在1250℃、1200℃、1170℃、1130℃和1100℃下,PbO-CaO-SiO2-Fe2O3-ZnO体系的液相点分布测试结果与MTDATA6.0软件模拟液相线基本吻合。在1000~1250℃范围内,随着结晶过程的进行,PbO-CaO-SiO2-Fe2O3-ZnO体系液相成分中Fe2O3含量从16.83%减少到7.67%,ZnO含量从7.62%减少到2.98%,(PbO+CaO+SiO2)含量从75.55%增加到89.36%。 展开更多
关键词 炼锌渣 铅 锌 PbO-CaO-SiO2-Fe2O3-ZnO炉渣 相平衡 液相线 物相组成
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磁载光催化剂ZnO/SiO_2/γ-Fe_2O_3的光催化性能 认领 引用 被引量：1
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作者 李红 张风梅 +1 位作者 彭秧 徐清山 《光散射学报》 北大核心 2009年第3期246-250,共5页
本文采用液相沉积法制备出了纳米Si O2/γ-Fe2O3复合粒子,在其表面负载ZnO,从而得到了易于磁性固液分离的磁载光催化剂ZnO/Si O2/γ-Fe2O3,并通过XRD和TEM等测试技术对样品进行了表征。以可溶性染料亚甲基兰等为降解对象,研究了磁载光... 本文采用液相沉积法制备出了纳米Si O2/γ-Fe2O3复合粒子,在其表面负载ZnO,从而得到了易于磁性固液分离的磁载光催化剂ZnO/Si O2/γ-Fe2O3,并通过XRD和TEM等测试技术对样品进行了表征。以可溶性染料亚甲基兰等为降解对象,研究了磁载光催化剂ZnO/Si O2/γ-Fe2O3在紫外光下的光催化活性。结果表明,在γ-Fe2O3和ZnO之间包覆一层无定形Si O2可使催化剂降佳率由20.76%提高到95.63%,并且该磁载光催化剂对染料有较好的降解效果,在三次循环使用后仍能保持较好的光催化性能. 展开更多
关键词 磁载光催化剂 ZnO/SiO2/γ-Fe2O3 氧化锌 亚甲基兰
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Hydrogen and syngas production from two-step steam reforming of methane over CeO_2-Fe_2O_3 oxygen carrier 认领 引用 被引量：18
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作者 祝星 王华 +2 位作者 魏永刚 李孔斋 程显名 《Journal of Rare Earths》 SCIE EI CAS 2010年第6期907-913,共7页
Two-step steam reforming of methane (SRM) is a novel chemical looping process towards the production of pure hydrogen and syngas (synthesis gas), consisting of a syngas production step and a water-splitting step. Rene... Two-step steam reforming of methane (SRM) is a novel chemical looping process towards the production of pure hydrogen and syngas (synthesis gas), consisting of a syngas production step and a water-splitting step. Renewable energy can be used to drive this process for hydrogen production, especially solar energy. CeO2-Fe2O3 complex oxide oxygen carrier was prepared by the impregnation method and characterized by means of X-ray diffractometer (XRD), Raman spectroscopy (Raman) and hydrogen programmed reduction (H2-TPR). CH4 temperature programmed and isothermal reactions were adopted to test syngas production reactivity, and water splitting reaction was employed to investigate water-splitting activity. Moreover, two-step SRM performance was evaluated by a successive redox cycle. The results showed that CO-uncontaminated H2 and highly selective syngas (with H2/CO ratio close to 2) could be respectively obtained from two steps, and CeFeO3 formation was found in the first redox cycle and proved to be enhanced by the redox treatment. After 10 successive cycles, obvious CeFeO3 phase was detected, which may be responsible for favorable successive redox cycle performances. 展开更多
关键词 two-step steam reforming of methane CeO2-Fe2O3 oxygen carrier redox cycle hydrogen syngas rare earths
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ZnO/In_2O_3纳米异质结的合成及其光催化性能的研究 认领 引用 被引量：16
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作者 何霞 刘海瑞 +3 位作者 董海亮 梁建 张华 许并社 《无机材料学报》 SCIE EI CAS CSCD 北大核心 2014年第3期264-268,共5页
通过热水解法成功制备出了形貌均一的ZnO/In2O3异质结光催化材料, 采用场发射扫描电子显微镜（FESEM）、X射线衍射仪（XRD）以及透射电子显微镜（TEM）对样品的形貌及结构进行表征。结果表明： ZnO/In2O3异质结是由直径约200-300 nm、... 通过热水解法成功制备出了形貌均一的ZnO/In2O3异质结光催化材料, 采用场发射扫描电子显微镜（FESEM）、X射线衍射仪（XRD）以及透射电子显微镜（TEM）对样品的形貌及结构进行表征。结果表明： ZnO/In2O3异质结是由直径约200-300 nm、厚度约40-60 nm的六边形纳米片镶嵌着In2O3纳米小颗粒组成。对比纯ZnO、纯In2O3和该光催化材料对罗丹明B（RhB）的可见光降解效率, 发现ZnO/In2O3异质结光催化材料对RhB具有较高的光催化效率, 其原因是窄带系半导体In2O3能够有效地吸收可见光, 当ZnO与In2O3形成异质结时, In2O3能带上被可见光激发的电子会迁移到ZnO的导带上, 而光激发的空穴仍保留在In2O3价带, 这样有助于光生电子和空穴的分离, 降低其复合几率, 从而有效地提高了ZnO的光催化效率。 展开更多
关键词 ZnO ZnO In2O3 罗丹明B 光催化效率
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2D/2D step-schemeα-Fe2O3/Bi2WO6 photocatalyst with efficient charge transfer for enhanced photo-Fenton catalytic activity 认领 引用 被引量：17
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作者 Wenliang Wang Wenli Zhao +2 位作者 Haochun Zhang Xincheng Dou Haifeng Shi 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 2021年第1期97-106,共10页
Although the traditional Fenton reaction is considered an effective strategy for solving problems caused by environmental pollution,construction of an efficient photocatalytic system by coordinating the Fenton reactio... Although the traditional Fenton reaction is considered an effective strategy for solving problems caused by environmental pollution,construction of an efficient photocatalytic system by coordinating the Fenton reaction is challenging.In this study,2D/2D step-schemeα-Fe2O3/Bi2WO6(FO/BWO)heterostructure photo-Fenton catalysts were successfully fabricated by a facile hydrothermal method.The as-prepared materials were characterized by XRD,FT-IR,TEM,XPS,UV-vis DRS,PL,I-t,EIS,and BET analyses.Under visible light irradiation,FO/BWO exhibited remarkably high and stable photo-Fenton catalytic activity for the degradation of methyl blue(MB)at low concentrations of H2O2.It was noted that FO/BWO(0.5)displayed a significantly enhanced photo-Fenton catalytic activity,which was 11.06 and 3.29 times those of FO nanosheets and BWO nanosheets,respectively.The notably improved photo-Fenton catalytic activity of FO/BWO was mainly due to the combination of H2O2 and FO under light illumination and the presence of the 2D/2D S-scheme heterostructure,with the large contact surface,abundant active sites,and efficient separation rate of photogenerated carriers playing contributory roles.Additionally,a possible catalytic mechanism for the FO/BWO composite was preliminarily proposed via active species trapping experiments.In summary,this study provided new insights into the synthesis of an effectively heterogeneous 2D/2D S-scheme photo-Fenton catalyst for degradation of organic pollutants in wastewater. 展开更多
关键词 Bi2WO6 α-Fe2O3 S-scheme Photo-Fenton 2D photocatalyst
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CaO-SiO_2-Al_2O_3-Fe_2O_3渣系脱磷行为 认领 引用 被引量：11
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作者 王多刚 李杰 +2 位作者 夏云进 张雷 虞大俊 《钢铁研究学报》 CAS CSCD 北大核心 2016年第7期20-25,共6页
利用Factsage软件计算了Al2O3含量对CaO-SiO2-Al2O3-Fe2O3四元渣系熔点和黏度的影响,并通过实验研究了在1 400℃时,CaO-SiO2-Al2O3-Fe2O3四元渣系对高磷铁水脱磷行为的影响。结果表明：渣中Al2O3的质量分数在3%~6%之间时,随着Al2O3含量... 利用Factsage软件计算了Al2O3含量对CaO-SiO2-Al2O3-Fe2O3四元渣系熔点和黏度的影响,并通过实验研究了在1 400℃时,CaO-SiO2-Al2O3-Fe2O3四元渣系对高磷铁水脱磷行为的影响。结果表明：渣中Al2O3的质量分数在3%~6%之间时,随着Al2O3含量的增加,渣系的熔化温度迅速降低,进一步增加渣中的Al2O3含量,渣系的熔化温度逐渐增加;Al2O3对CaO-SiO2-Al2O3-Fe2O3渣系的黏度影响不大;渣中Al2O3的质量分数在3%~6%之间变化时,渣系脱磷能力变化不是很大,脱磷率维持在91%左右,进一步增加渣系中Al2O3的量,脱磷率逐渐下降;Al2O3对脱磷率产生影响可能是其改变了炉渣中液相所占比例,进而影响磷从铁水中向液相渣的传质过程。 展开更多
关键词 CaO-SiO2-Al2O3-Fe2O3渣系 脱磷 熔化温度 液相
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固相法制备α-Fe_2O_3纳米粒子 认领 引用 被引量：43
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作者 邱春喜 姜继森 +1 位作者 赵振杰 杨燮龙 《无机材料学报》 SCIE EI CAS 北大核心 2001年第5期957-960,共4页
用固相反应法合成了纳米α－Fe2O3粒子。采用XRD、TEM、Mossbauer对合成样品进行表征，结果表明此方法合成的粒子为α－Fe2O3．其粒子呈花生型，粒子直径为20～40nm左右．
关键词 固相合成 纳米粒子 α-Fe2O3 α-三氧化二铁 纳米材料
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One-pot hydrothermal fabrication of α-Fe_2O_3@C nanocomposites for electrochemical energy storage 认领 引用 被引量：10
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作者 Maiyong Zhu Jiarui Kan +4 位作者 Jianmei Pan Wenjie Tong Qi Chen Jiacheng Wang Songjun Li 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2019年第1期1-8,共8页
A facile hydrothermal method was developed for the preparation of Fe_2O_3@C nanocomposites using FeCl_3·6H_2O as iron source and glucose as carbon source under alkaline condition. The morphology and structure of ... A facile hydrothermal method was developed for the preparation of Fe_2O_3@C nanocomposites using FeCl_3·6H_2O as iron source and glucose as carbon source under alkaline condition. The morphology and structure of the as-prepared product were identified by transmission electron microscopy(TEM), high resolution transmission electron microscopy(HRTEM), field-emission scanning electron microscopy(FESEM),X-ray diffraction(XRD), Raman spectroscopy, Fourier Transform infrared spectroscopy(FTIR), and thermogravimetric analysis(TGA). The as-prepare α-Fe_2O_3@C nanocomposites were employed for supercapacitor electrode material. The synergistic combination of carbon electrical double-layer capacitance and α-Fe_2O_3 pseudo-capacitance established such nanocomposites as versatile platform for high performance supercapacitors. The synthesis method developed here is expected to obtain other metal oxide/carbon composite. 展开更多
关键词 α-Fe2O3 Carbon Hydrothermal Pseudocapacitor
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纳米α-Fe_2O_3-TiO_2改性海藻酸钠/壳聚糖双极膜制备与表征 认领 引用 被引量：10
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作者 陈日耀 陈震 +2 位作者 陈晓 郑曦 孙婷 《无机化学学报》 SCIE CAS 北大核心 2010年第10期1790-1795,共6页
在壳聚糖(CS)阴离子交换膜中添加纳米复合半导体材料α-Fe2O3-TiO2,制备了PVA-SA/α-Fe2O3-TiO2-CS双极膜(PVA:聚乙烯醇;SA:海藻酸钠),并用扫描电镜、热重分析、电子万能试验机和接触角测定仪等对其进行了表征。研究结果表明,添加纳米α... 在壳聚糖(CS)阴离子交换膜中添加纳米复合半导体材料α-Fe2O3-TiO2,制备了PVA-SA/α-Fe2O3-TiO2-CS双极膜(PVA:聚乙烯醇;SA:海藻酸钠),并用扫描电镜、热重分析、电子万能试验机和接触角测定仪等对其进行了表征。研究结果表明,添加纳米α-Fe2O3-TiO2可提高双极膜的亲水性、热稳定性和机械性能。纳米α-Fe2O3-TiO2复合半导体材料较纳米α-Fe2O3或纳米TiO2单一半导体材料具有更强的光催化双极膜中间界面层水解离能力,在高压汞灯照射下能大大降低双极膜的膜阻抗和膜电阻压降(IR降)。 展开更多
关键词 双极膜 光催化 水解离 纳米α-Fe2O3 纳米TiO2
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沉淀还原法制备高性能CO_2加氢合成甲醇Cu/ZnO/Al_2O_3催化剂 认领 引用 被引量：21
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作者 曹勇 陈立芳 +3 位作者 戴维林 范康年 吴东 孙予罕 《高等学校化学学报》 SCIE EI CAS 北大核心 2003年第7期1296-1298,共3页
A novel coprecipitation-reduction process has been proposed for preparing highly selective Cu/ZnO/Al 2O 3 catalysts for methanol synthesis from CO 2 hydrogenation. Compared to the catalysts prepared by the conventiona... A novel coprecipitation-reduction process has been proposed for preparing highly selective Cu/ZnO/Al 2O 3 catalysts for methanol synthesis from CO 2 hydrogenation. Compared to the catalysts prepared by the conventional method, the new catalysts prepared via the new method exhibit much higher BET surface area and pore size, much smaller crystallite size and higher catalytic activity and selectivity in CO 2 hydrogenation to methanol. It is also found that the molar ratio of Cu + to Cu 0 on the surface of the catalyst obtained by coprecipitation-reduction is much higher than that on the reduced catalyst obtained by the conventional method, which could be crucial for its high activity and selectivity for catalytic hydrogenation of CO 2 to methanol. 展开更多
关键词 沉淀还原法 制备 CO2 加氢合成 甲醇 Cu/ZnO/Al2O3 催化剂 碳酸盐共沉淀 液相化学还原
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导电聚苯胺与磁性γ-Fe_2O_3纳米复合物的电磁性能 认领 引用 被引量：14
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作者 杨青林 翟锦 +4 位作者 宋延林 万梅香 江雷 徐文国 李前树 《高等学校化学学报》 SCIE EI CAS 北大核心 2003年第12期2290-2292,共3页
Nanocomposites of PAn-DBSA/γ-Fe 2O 3 with electrical and ferromagnetic behavior(σ= 2.18×10 -3-5.00×10 -5 S/cm, M s=3.7-16.6 m 2·A/kg, H c=8 805.2-9 133.1 A/m) were prepared by a chemical modification-... Nanocomposites of PAn-DBSA/γ-Fe 2O 3 with electrical and ferromagnetic behavior(σ= 2.18×10 -3-5.00×10 -5 S/cm, M s=3.7-16.6 m 2·A/kg, H c=8 805.2-9 133.1 A/m) were prepared by a chemical modification-redoping method in a neutral medium. The products were characterized by TEM, XRD, UV-Vis, four-probe method, and magnetometer. The results indicate that the electrical and magnetic properties of the nanocomposites strongly depend on γ-Fe 2O 3 content. With the increase of γ-Fe 2O 3 content, the electrical conductivity is decreased and saturation magnetization is increased. 展开更多
关键词 导电聚苯胺 γ-Fe2O3 纳米复合物 电磁性能 三氧化二铁 纳米材料
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煅烧温度对γ-Fe_2O_3催化剂结构及其脱硝活性的影响 认领 引用 被引量：9
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作者 王栋 张信莉 +3 位作者 彭建升 路春美 韩奎华 徐丽婷 《环境科学研究》 EI CAS CSSCI CSCD 北大核心 2015年第5期808-815,共8页
采用沉淀-微波热解法,以Fe SO4·7H2O为铁源制备环境友好的γ-Fe2O3催化剂,结合XRD（X射线衍射）、N2等温吸附-脱附、SEM（扫描电子显微镜）、EDS（能谱仪）等手段对催化剂样品的晶相、孔结构、表面形貌、表面元素组成等进行表征,... 采用沉淀-微波热解法,以Fe SO4·7H2O为铁源制备环境友好的γ-Fe2O3催化剂,结合XRD（X射线衍射）、N2等温吸附-脱附、SEM（扫描电子显微镜）、EDS（能谱仪）等手段对催化剂样品的晶相、孔结构、表面形貌、表面元素组成等进行表征,并考察其NH3-SCR（选择性催化还原）脱硝性能,研究煅烧温度对γ-Fe2O3催化剂物性及NH3-SCR脱硝性能的影响规律.结果表明：300、350和450℃下煅烧制备的催化剂中生成的杂质α-Fe2O3对SCR反应不利,而400℃煅烧制备的γ-Fe2O3催化剂脱硝性能最优,NOx转化率最高可达95%以上,XRD结果表明其纯度高,并且在60~100 nm孔径区间具有发达的孔隙结构,有利于SCR反应进行;随着煅烧温度升高,γ-Fe2O3催化剂表面晶格氧逐渐增加,颗粒形貌经历了片状颗粒（300、350℃）→球状颗粒（400℃）→针状颗粒（450℃）的变化过程,均匀的球状颗粒形貌及其表面丰富的晶格氧是400℃煅烧制得催化剂具备最优脱硝性能的重要因素. 展开更多
关键词 选择催化还原 脱硝 催化剂 γ-Fe2O3 煅烧温度 微波
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