南京大学学报（自然科学版）2017，Vol.53Issue(5)：823-830,8.DOI:10.13232/j.cnki.jnju.2017.05.001
天然闪锌矿光催化还原二氧化碳实验研究
Experimental study of photocatalytic reduction of carbon dioxide on natural sphalerite
摘要
Abstract
The chemical composition,mineral phase and band structure were analyzed by electron probe microanalyzer(EPMA),Raman,X-ray photoelectron spectroscopy(XPS) and UV-vis diffuse reflectance spectroscopy(UV-vis DRS).The dopants including Fe,Cu,Ga raised valence band position and introduced donor level and acceptor level to band structure of natural sphalerite,expanding the light absorption range.In weak acidic and anaerobic solution,the yield of HCOOH photo-reduced by natural sphalerite was 12 mg·L-1 after irradiation for 9 h,higher than synthetic ZnS.The synergistic effect in the use of both NaH2PO2 and Na2S as hole scavenger was also discussed.According to the point of zero charge(PZC)of sphalerite,a micro mechanism was proposed to reveal the process of photocatalytic reduction on natural sphalerite surface.Our research might explore the application of natural semiconducting minerals as cost-effective photocatalysts and provide direction to accelerate photoreduction of CO2 by surface modification.关键词
天然闪锌矿/光催化/光还原/二氧化碳/掺 杂Key words
natural sphalerite/photocatalytic/photoreduction/carbon dioxide/dopants分类
信息技术与安全科学引用本文复制引用
刘熠,李艳,黎晏彰,鲁安怀,丁竑瑞,王长秋..天然闪锌矿光催化还原二氧化碳实验研究[J].南京大学学报（自然科学版）,2017,53(5):823-830,8.基金项目
国家自然科学基金(41230103,41522201,41272003),国家重点基础研究发展计划(973项目)(2014CB846001) （41230103,41522201,41272003）
