市政技术2024，Vol.42Issue(3)：186-192,236,8.DOI:10.19922/j.1009-7767.2024.03.186
g-C3N4/TiO2复合汽车尾气光催化剂的组成设计与性能评价
Composition Design and Performance Evaluation of g-C3N4/TiO2 Composite Vehicle Exhaust Photocatalysts
摘要
Abstract
With the increased negative impact of vehicle exhaust to the air pollution year by year,the application of photocatalytic technology has gradually received attention.Therefore,based on the photocatalytic properties of tita-nium dioxide(TiO2)and graphitic carbon nitride(g-C3N4),a g-C3N4/TiO2 composite photocatalyst was proposed to improve the efficiency of vehicle exhaust degradation.Melamine(C3H6N6),dicyandiamide(C2H4N4),and urea(CH4N2O)were selected as precursors to prepare g-C3N4.The best precursor was selected by mass loss and exhaust degradation test analysis.The g-C3N4/TiO2 composite photocatalyst with different mass ratios was designed;The photocatalytic performance of monomer and composite photocatalyst was compared and analyzed to obtain the opti-mal mass ratio of the composite photocatalyst ultimately.The results show that the optimal precursor for the prepara-tion of g-C3N4 is C3H6N6.The best mass ratio of the composite photocatalyst of C3H6N6∶TiO2 is 2∶1,and the degrada-tion efficiency of composite materials is the best;In 60 minutes,the degradation efficiency and HC,CO and NOx was 16.12％,16.87％and 45.37％,respectively by g-C3N4/TiO2 composite photocatalyst,the efficiency is obviously higher than that of monomer TiO2.This study provides useful reference for further optimizing photocatalytic technol-ogy and helps to promote its application and development in the field of environmental protection.关键词
光催化/汽车尾气降解/TiO2/石墨相氮化碳Key words
photocatalysis/vehicle exhaust degradation/titanium dioxide(TiO2)/graphitic carbon nitride分类
环境科学引用本文复制引用
周波超,崔奥,吴鸿飞,韩武松,王超..g-C3N4/TiO2复合汽车尾气光催化剂的组成设计与性能评价[J].市政技术,2024,42(3):186-192,236,8.基金项目
北京市教育委员会科技计划一般项目(KM202310005002) （KM202310005002）
邯郸市科学技术研究与发展计划项目(21422093008,21422111084) （21422093008,21422111084）
