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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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溶胶凝胶法制备硫掺杂tio2及其可见光催化性能的研究
, PP. 56-60
Keywords: 溶胶-凝胶法,硫掺杂,掺杂量,可见光,光催化降解
Abstract:
以钛酸丁酯和硫脲为原料,用溶胶凝胶法制备掺杂硫的tio2光催化剂,并用xrd、xps、及uv-vis吸收光谱对粉体进行了表征.以其对亚甲蓝和1-萘酚-8-磺酸的去除率来考察催化剂的可见光活性.结果表明:硫的掺杂减小了tio2的禁带能隙,使其在可见光区具有光催化活性.硫的掺杂量对tio2光催化剂的可见光吸收范围及可见光活性有明显的影响.当s掺杂量在1.2%时,样品的吸收带边可达450nm,对亚甲蓝的光降解率最高.10mg.l-1的1-萘酚-8-磺酸使用1.2%s-tio2催化剂在可见光下反应7h,去除率达72.4%.该催化剂为锐钛矿型,平均粒径约为7.4nm.xps分析结果表明,s原子在催化剂中主要以s6+和s4+价态存在.
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