摘要
采用溶胶凝胶法研制了Fe、N单独掺杂或Fe、N共同掺杂改性TiO_2催化剂,并用浸渍法负载于低密度聚乙烯(LDPE)膜上,制备出LDPE膜负载型催化剂。利用X射线衍射、X射线能谱、紫外—可见光吸收光谱、扫描电子显微镜对催化剂进行表征分析,并考察了催化剂种类、二苯胺(DPA)初始浓度、pH、曝气等因素对降解DPA的影响。结果表明:LDPE膜负载型Fe/N-TiO_2在可见光区有较强的吸收;负载的Fe/N-TiO_2粒子均匀地分布于LDPE膜表面;在氙灯的可见光照射下,DPA初始质量浓度为20mg/L、曝气量为2L/min、溶液pH为3时,Fe/N-TiO_2光催化反应90min时DPA降解率可达到80.11%。
Fe-doped TiO2,N-doped and Fe/N-codoped TiO2 were prepared via the sol-gel method,then they were loaded on LDPE films to obtain photocatalysts.The morphology of the catalysts were examined using X-ray diffraction,X-ray photoelectron spectroscopy,UV-Vis spectra and scanning electron microscopy.The effects of catalyst species,initial DPA concentration,pH and aeration on the degradation rate of DPA were investigated.The results showed that Fe/N-TiO2 had high visible light response.Fe/N-TiO2 were distributed evenly on the surface of LDPE films.Under the irradiation of xenon lamp,the 20 mg/L initial concentration of DPA solution,the aeration rate of 2 L/min and the solution pH of 3,it took about 90 min to achieve about 80.11%removal rate.
作者
邓一荣
张永来
赵璐
吴俭
DENG Yirong;ZHANG Yonglai;ZHAO Lu;WU Jian(Guangdong Key Laboratory of Contaminated Environmental Management and Remediation,Guangdong Provincial Academy of Environmental Science,Guangzhou Guangdong 510045;State Key Laboratory of Organic Geochemistry,Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou Guangdong 510640;Suzhou Environmental Monitoring Centre,Suzhou Jiangsu 215004;Guangzhou Research Institute of Environmental Protection,Guangzhou Guangdong 510620)
出处
《环境污染与防治》
CAS
CSCD
北大核心
2018年第9期1015-1018,1032,共5页
Environmental Pollution & Control
基金
国家自然科学基金资助项目(No.41501184、No.41601616)
有机地球化学国家重点实验室开放基金资助项目(No.SKLOG-201618)
国家科技支撑计划项目(No.2014BAC15B01)。
