用溶胶-凝胶法制备了Pt2+掺杂的Bi2O3光催化剂(Pt/Bi原子比分别为1/100、2/100、3/100和4/100),以甲基橙为模拟有机污染对催化剂的光催化性能进行了考察.光催化剂用BET、XRD、XPS和紫外-可见漫反射进行了表征,结果表明Pt/Bi原子比为3/100时催化剂的比表面最高;经500℃焙烧后光催化剂晶型为α- Bi2O3;掺杂Pt2+后Bi2O3在可见光区的吸收增强;掺杂Pt2后Bi4f7/2和O1s结合能均向低能端偏移,催化性能测试结果表明Pt/Bi原子比为3/100时的催化剂活性最高.增加的比表面、对可见光响应增强和结合能向低能端偏移均有利于提高Bi2O3光催化活性.
参考文献
| [1] | Hameed A;Montini T;Gombac V;Fornasiero P .Surface phases and photocatalytic activity correlation of Bi2O3/Bi2O4-x nanocomposite[J].Journal of the American Chemical Society,2008(30):9658-9659. |
| [2] | Jingjing Xu;Yanhui Ao;Degang Fu;Chunwei Yuan .Synthesis Of Bi_2o_3-tio_2 Composite Film With High-photocatalytic Activity Under Sunlight Irradiation[J].Applied Surface Science: A Journal Devoted to the Properties of Interfaces in Relation to the Synthesis and Behaviour of Materials,2008(5P1):2365-2369. |
| [3] | Lin XP;Huang FQ;Wang WD;Zhang KL .A novel photocatalyst BiSbO4 for degradation of methylene blue[J].Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications,2006(2):257-262. |
| [4] | Hameed, A;Gombac, V;Montini, T;Felisari, L;Fornasiero, P .Photocatalytic activity of zinc modified Bi2O3[J].Chemical Physics Letters,2009(4/6):254-261. |
| [5] | Li, LZ;Yan, B .CeO2-Bi2O3 nanocomposite: Two step synthesis, microstructure and photocatalytic activity[J].Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites,2009(13):776-779. |
| [6] | Chai SY;Kim YJ;Jung MH;Chakraborty AK;Jung D;Lee WI .Heterojunctioned BiOCl/Bi2O3, a new visible light photocatalyst[J].Journal of Catalysis,2009(1):144-149. |
| [7] | Bessekhouad Y;Robert D;Weber J V .Photocatalytic activity of Cu2O/TiO2,Bi2O3/TiO2 and ZnMn2O4/TiO2 heterojunctions[J].Catalysis Today,2005,101(3/4):315-321. |
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