Photocatalytic Activity of Combustion Synthesized ZrO2 and ZrO2–TiO2 Mixed Oxides
Photocatalytic Activity of Combustion Synthesized ZrO2 and ZrO2–TiO2 Mixed Oxides
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DOI：
10.1021/ie200350f
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发表时间：
2011-07
影响因子：
4.2
通讯作者：
S. Polisetti;Parag A. Deshpande;G. Madras
中科院分区：
文献类型：
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作者：
S. Polisetti;Parag A. Deshpande;G. Madras
采用溶液燃烧法合成了四元ZrO 2，研究了其对阴离子染料的光催化降解性能。通过FT-Raman光谱、X射线光电子能谱、FT-IR光谱、UV-vis光谱、BET比表面积分析和零点电荷pH测量对化合物进行了表征。通过XPS和FTIR证实，在催化剂上观察到高浓度的表面羟基。以橙子G、氨基黑、雷马唑艳蓝R和茜素花菁绿色（ACG）为目标染料，研究了该材料的光催化降解性能。还研究了pH、无机盐和H2 O2对催化剂活性的影响，发现催化剂在宽的pH范围内和无机盐存在下保持其活性。在确定了ZrO 2具有光催化活性的基础上，还对TiO 2-ZrO 2复合氧化物催化剂进行了光催化降解ACG的试验，其中50%ZrO2-TiO 2复合氧化物的光催化降解ACG的效果最好。
Tetragonal ZrO2, synthesized by solution combustion technique, was found to be photocatalytically active for the degradation of anionic dyes. The compound was characterized by FT-Raman spectroscopy, X-ray photoelectron spectroscopy, FT-infrared spectroscopy, UV–vis spectroscopy, BET surface area analysis, and zero point charge pH measurement. A high concentration of surface hydroxyl groups was observed over the catalyst, as confirmed by XPS and FTIR. The photocatalytic degradation of orange G, amido black, remazol brilliant blue R, and alizarin cyanine green (ACG) was carried out with this material. The effect of pH, inorganic salts, and H2O2 on the activity of the catalyst was also studied, and it was found that the catalyst maintained its activity at a wide range of pH and in the presence of inorganic salts. Having established that ZrO2 was photocatalytically active, mixed oxide catalysts of TiO2–ZrO2 were also tested for the photocatalytic degradation of ACG, and the 50% ZrO2–TiO2 mixed oxides showed a...