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| 1 | Preparation and Characterization of Gd^(3+)-doped Monodisperse TiO_2 Hollow Microsphere显示文摘Gd^(3+)-doped monodisperse TiO_2 hollow microspheres with various molar ratios of Gd^(3+)/TBOT were synthesized via a novel process, which involved the preparation of SiO_2 templates, deposition of Gd^(3+)-doped TiO_2 by sol-gel, SiO_2 coating, heat treatment to induce crystallization of TiO_2, and finally etching away the inner SiO_2 templates and outer SiO_2 layers. The synthesized samples were characterized by transmission electron microscopy(TEM), scanning electron microscopy(SEM), X-ray diffraction(XRD), diffuse reflection spectroscopy(DRS), specific surface area measurement(BET) and X-ray photoelectron spectroscopy(XPS), respectively. The photocatalytic activity of Gd^(3+)-doped samples was evaluated via photocatalytic degradation of Methyl orange under UV irradiation. The results show that the SiO_2 layers prevent aggregation of TiO_2 hollow microspheresand improve the thermal stability of the synthesized samples. Also, the photocatalytic activity of monodisperse TiO_2 hollow microspheres can be enhanced at the optimal molar ration of Gd^(3+)/TBOT of 0.7%. | JI Feng SHANG Pengbo ZHENG Yuying | 2015 | Journal of the Chinese Ceramic Society2015，，4： | 3 |
| 2 | Sb_2O_3/α-Fe_2O_3纳米异质结的制备及其光催化性能显示文摘以Fe(NO3)3·9H2O和Sb Cl3为原料,采用水热法和浸渍法制备了Sb2O3/α-Fe2O3纳米异质结复合可见光催化剂,并用X射线衍射(XRD)、扫描电子显微镜(SEM)、X射线光电子能谱(XPS)和紫外可见漫反射光谱(UVVis DRS)等测试手段表征了试样的结构和性能。结果表明:Sb2O3与α-Fe2O3的复合使α-Fe2O3吸收带边红移,在可见光区的吸收增强;Sb2O3只存在于α-Fe2O3的表面,未改变α-Fe2O3的晶体结构;二者形成的异质结,能高效转移光生载流子,并实现电子-空穴的高效分离;以甲基橙为目标降解物考察了催化剂的可见光催化降解性能,结果显示,Sb2O3/α-Fe2O3的可见光催化活性优于纯α-Fe2O3;当Sb2O3的复合含量为1.5%时,光催化活性最佳。 | 左广玲 叶红勇 李入林 | 2015 | 南阳理工学院学报2015，7，4： | 1 |
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