环境工程学报2017，Vol.11Issue(8)：4594-4600,7.DOI:10.12030/j.cjee.201606002
Mn掺杂TiO2纳米材料的制备及可见光催化降解水中腐殖酸
Preparation of Mn doped TiO2 nanomaterials and their visible-light photocatalytic performance for degradation of humic acid
摘要
Abstract
Mn-TiO2 photocatalyst was synthesized by a sol-gel method using the precursors of tetrabutyl titanate and manganese sulfate.The prepared samples were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and UV-vis diffuse reflectance spectroscopy (DRS).The Mn-TiO2 nanomaterials synthesized at different calcination temperatures were evaluated as photocatalysts for the degradation of humic acid (HA) in the visible light range.It was found that Mn-TiO2 photocatalyst was identified as the anatase phase when the calcination temperature was in the range from 350 to 500 ℃, and its response could be extended to the visible light region.Furthermore, the calcination temperature played an important role in the photocatalytic activity, and the 400 ℃ enabled the best photocatalytic performance.A degradation rate of 75.1％ was achieved after 240 minutes with 1 g · L-1 of Mn-TiO2 when the initial concentration of HA is 5 mg · L-1.The photocatalytic degradation process followed pseudo-first order kinetics with the reaction rate constant of 0.0066 min-1.关键词
Mn掺杂/TiO2/煅烧温度/可见光催化/腐殖酸Key words
Mn-doped/TiO2/calcination temperature/visible photocatalysis/humic acid分类
资源环境引用本文复制引用
王菲凤,李丽丽,吴春山,林智斌,朱爽..Mn掺杂TiO2纳米材料的制备及可见光催化降解水中腐殖酸[J].环境工程学报,2017,11(8):4594-4600,7.基金项目
福建省科技厅项目(2016Y4002) （2016Y4002）
福建省科技重大专项(2015YZ0001-1) （2015YZ0001-1）
