摘要
采用浸渍法制备了Cu(Ⅱ)-AgNbO3光催化剂,并运用XRD、FT-IR、DRS、XPS和SEM对催化剂进行表征和分析。实验以亚甲基蓝为模拟污染物,在紫外光下考察Cu(Ⅱ)掺杂对AgNbO3光催化效果的影响。分析显示,掺杂Cu(Ⅱ)后AgNbO3晶型及表面形貌没有发生变化,但在可见光区的吸光度得到有效提高。光催化脱色结果表明,当Cu(Ⅱ)的掺杂量为2%(质量比),热处理温度为300℃,催化剂用量为1 g/L,亚甲基蓝初始浓度为10 mg/L,溶液pH值为7.15时,Cu(Ⅱ)-AgNbO3紫外光催化亚甲基蓝脱色的效果最好,3 h后,亚甲基蓝脱色率可达97.1%。
The photocatalyst of Cu ( Ⅱ )-AgNbO3 was prepared by impregnation method and characterized by X-ray diffraction (XRD) , Fourier transform infrared spectroscopy (FT-IR) , UV-vis diffuse reflectance spectroscopy (DRS) , X-ray photoelectron spectroscopy (XPS) and scanning electron microscope (SEM). The influence of Cu ( Ⅱ ) loading on photocatalytic effect of AgNbO3 was measured by decorization of methylene blue (MB) under UV light irradiation. The results showed that the crystal and feature of AgNbO3 with Cu( Ⅱ ) loading did not change, but its absorbance increased in visible light region. As a result of photocatalysis, when the content of Cu ( Ⅱ ) loading, calcination temperature, amount of photocatalyst, initial concentration of MB and pH value of solution were found to be 2% (weight), 300℃ , 1 g/L, 10 mg/L and 7. 15 for the reaction, the MB showed the best effect of decorization under UV light irradiation on Cu( 11 )-AgNbO3, and the decolorization rate of MB reached 97. 1 % in three hours.
出处
《环境工程学报》
CAS
CSCD
北大核心
2008年第5期619-624,共6页
Chinese Journal of Environmental Engineering
基金
镇江社会发展基金资助项目(SH2006069)
江苏大学人才启动基金资助项目(04JDG044)