期刊论文

Study on Photocatalytic Degradation of Reactive Orange 4 in Aqueous Solution Using Sm^3＋-doped TiO2 Particles by Sun Light

中文

湖南科技大学学报(自然科学版)

1672-9102

2008

23

4

99-102

10.3969/j.issn.1672-9102.2008.04.023

湖南自然科学基金资助项目（08JJ3021）； 湖南省科技计划资助项目（2007GK3038）； 湖南省教育厅科学研究基金资助项目（07C098）；

本校为第一机构

以钛酸丁酯和氧化钐为原料，采用溶胶-凝胶法制备了掺杂TiO2光催化剂，用XRD和TEM等手段对其进行表征，并以活性橙4（RO。）偶氮染料为目标降解物，考察了Sm^3＋掺杂对TiO2光催化效果的影响．结果表明该催化剂具有较高的光催化降解偶氮染料的活性，随着光照时间的延长，RO4的特征峰489nm和285nm强度逐渐减弱，RO4的偶氮键是最活跃的化学键，它易于被氧化断键．Sm^3＋掺杂催化剂的催化活性受溶液的pH影响较大，在中性和碱性条件下其光催化活性更强．分析和探讨了Sm^3＋掺杂TiO2粒子光催化降解能力提高的原因．图5，表1，参7．

The photocatalytic decolourisation and degradation of an azo dye reactive orange 4 （RO4） in aqueous solution with Sm^3＋-doped titania particles as a photocatalyst prepared from （Ti （O-Bu）4） and Sm2O3 by sol-gel method and indicated by the means of XRD and TEM were investigated using solarlight. The results show that the nanoeomposite photocatalysts have high photoeatalytic activity. The intensity of the 489 nm and 285 nm absorption peak corresponding to the reactive orange 4 （RO4） deereased rapidly during the photolysis process. It als...