摘要
类石墨相氮化碳(g-C_(3)N_(4))是光催化处理染料废水极具潜能的材料,然而常见的块体g-C_(3)N_(4)光降解效率低,光催化活性受比表面积、晶体结构、对可见光的吸收能力以及光生电子-空穴对的复合率等多个因素共同影响。介绍了形貌调控、金属掺杂、非金属掺杂和半导体复合等改性手段,通过增加光催化有效反应位点、延长光生电子-空穴生命周期、提高催化剂对可见光的响应能力等多个方面提高g-C_(3)N_(4)材料在可见光下降解染料的效率。对g-C_(3)N_(4)进行改性和优化处理可以从合成单个材料的方法入手,也可以对材料进行一系列的改性。为了开发更高效的具有实际应用价值的g-C_(3)N_(4)光催化剂,需要综合考虑g-C_(3)N_(4)光催化剂合成方法的实用性、原料的经济性、催化剂回收循环利用的可行性以及适用染料的广泛性。
Graphite carbon nitride(g-C_(3)N_(4))is a promising material for dye wastewater treatment by photocatalysis,while the common bulk g-C_(3)N_(4) has low photodegradation efficiency.The photocatalytic activity of g-C_(3)N_(4) is affected by specific surface area,crystal structure,absorption capacity of visible light and recombination rate of photoelectron-hole pair.Morphology regulation,metal doping,non-metal doping and semiconductor recombination are introduced.Dyes degradation efficiency of g-C_(3)N_(4) under visible light could be improved by increasing the effective reaction site of photocatalysis,prolonging the lifecycle of photoelectron-hole and improving the response of photocatalyst to visible light.The modification and optimization of g-C_(3)N_(4) could be realized by synthesizing the single material or with a series of modification processes.In order to develop more efficient g-C_(3)N_(4) photocatalyst with practical application value,researches are suggested to focus more on the practicality of synthesis method of g-C_(3)N_(4) photocatalyst,the economy of raw materials,the feasibility of photocatalyst recovery and the universality of applicable dyes.
作者
付嘉琦
陈小平
林敏
龚媛媛
FU Jiaqi;CHEN Xiaoping;LIN Min;GONG Yuanyuan(Institute of Energy,Jiangxi Academy of Sciences,Nanchang 330096,China)
出处
《能源研究与管理》
2021年第4期42-46,共5页
Energy Research and Management
基金
中国博士后科学基金(2018M642596)
江西省主要学科学术和技术带头人培养计划——青年人才项目(20212BCJ23031)。
