摘要
各类行业的废气排放导致环境污染问题严重。挥发性有机污染物(VOCs)作为工业废气中首要组成部分,因其成分的复杂性而难以处理,无选择性氧化的光催化高级氧化技术在VOCs降解领域引起广泛研究。为了解决光催化反应历程中存在的效率低问题,本文从VOCs的光催化工艺参数影响因素(温度、相对湿度、初始气体浓度、氧浓度和气体流速)展开描述,总结了各种工艺参数的影响机理和影响趋势。随着光化学技术和电化学技术的不断发展,将光电技术结合起来成为新的研究方向,外加偏压能够有效降低光催化反应历程中电子空穴对的复合率,本文总结了各类光电催化反应器中外加偏压对光电催化的影响机理和影响趋势。总结近五年的光/光电催化的实验研究进展,对于光/光电催化领域降解工业废气VOCs的工艺流程设计与优化具有借鉴意义。文中指出,未来进行与工业废气VOCs相契合参数范围的实验研究和简洁且高效的光/光电催化反应器研发将成为今后的发展趋势。
Emissions from various industries have led to increasingly serious environmental problems.Volatile organic compounds(VOCs)is the primary components of industrial waste gas,and photocatalytic advanced oxidation technology for non-selective oxidation of VOCs has attracted extensive researches.In order to solve the problem of low efficiency in the photocatalytic reaction,this review described the influencing factors of photocatalytic degradation of VOCs(temperature,relative humidity,initial gas concentration,oxygen concentration and gas flow rate),and summarized the influencing mechanism and influencing trend of various process parameters.With the continuous development of photochemical and electrochemical technologies,their combination has become a new research direction,and bias voltage can effectively reduce the recombination rate of electron hole pair.So,this review also summarized the influence of bias voltage in different photoelectric catalytic reactors on the photoelectric catalysis mechanism.Experimental research progress of photocatalysis/photoelectrocatalysis in recent five years were introduced,which has guiding significance for the design and optimization of the photocatalysis/photoelectrocatalysis degradation of industrial waste gas VOCs.In the future,it will be the development trends to carry out experimental research with the parameters matching the industrial waste gas VOCs and to develop simple and efficient photocatalysis/photoelectrocatalysis reactor.
作者
徐伟
李凯军
宋林烨
张兴惠
姚舜华
XU Wei;LI Kaijun;SONG Linye;ZHANG Xinghui;YAO Shunhua(School of Civil Engineering,Taiyuan University of Technology,Taiyuan 030024,Shanxi,China)
出处
《化工进展》
EI
CAS
CSCD
北大核心
2023年第7期3520-3531,共12页
Chemical Industry and Engineering Progress
关键词
光化学
电化学
光电协同催化
降解
挥发性有机污染物
photochemistry
electrochemistry
electrical enhanced photocatalysis
degradation
volatile organic compounds(VOCs)
