硼化氮化碳/二氧化锡异质结的制备及光催化性能  

Investigation on Synthesis of BCN/SnO_(2)Heterojunction and Its Photocatalytic Properties

作　　者：张铭[1,2] 李赛楠 张持 马林昊 彭铠 杨威 ZHANG Ming;LI Sainan;ZHANG Chi;MA Linhao;PENG Kai;YANG Wei(Faculty of Materials and Manufacturing,Beijing University of Technology,Beijing 100124,China;Key Laboratory of Advanced Functional Materials,Ministry of Education,Beijing 100124,China;Beijing Dingshengcheng Packing Material Co.,Ltd.,Beijing 100040,China)

机构地区：[1]北京工业大学材料与制造学部,北京100124 [2]新型功能材料教育部重点实验室,北京100124 [3]北京鼎盛成包装材料有限公司,北京100040

出　　处：《北京工业大学学报》2024年第5期534-542,共9页Journal of Beijing University of Technology

基　　金：国家重点研发计划项目资助(2018YFB0703500);国家自然科学基金资助项目(11774017)。

摘　　要：开发光催化材料被认为是缓解能源短缺与环境污染的有效策略之一,然而,同时实现高效、长期稳定和具有宽响应范围的催化剂仍然是光催化领域一个具有挑战性的目标。采用“一锅热聚合法”成功合成一种对光响应良好的硼化氮化碳/二氧化锡异质结。研究结果表明,硼化氮化碳/二氧化锡异质结材料可表现出优异的光催化活性,在模拟太阳光照射40 min时,对亚甲基蓝(methylene blue,MB)的降解率可达到94.8%。原因为异质结构和B掺杂的协同优化作用,优化作用主要表现为使其光学带隙减小而增强其可见光吸收特性,以及降低电子-空穴对的复合,优化其光催化活性。此外,还通过实验构建异质结界面能带结构模型,对光催化降解反应中的活性物种与反应机理进行了深入辨析与讨论。The development of photocatalytic materials is considered to be one of the effective strategies to alleviate energy shortage and environmental pollution.However,it remains a challenging goal in the field of photocatalysis to simultaneously achieve high efficiency,long-term stability and a wide range of light response.In this paper,BCN/SnO_(2)heterojunction were prepared by hydrothermal assisted thermal polymerization of stannic oxide and graphite phase carbon nitride precursor.Results show that BCN/SnO_(2)heterojunction has excellent photocatalytic degradation activity,and the degradation rate of methylene blue(MB)can reach 94.8%when the simulated sunlight irradiation is 40 min.This is due to the synergistic effect of heterostructure and B-doping,which is mainly manifested in the enhancement of visible light absorption characteristics by reducing optical band gap,and the reduction of electron-hole pair recombination,and thus improves the photocatalytic activity.In addition,a model of interfacial band structure of heterojunction was constructed by experiments,the active species and reaction mechanism of photocatalytic degradation were analyzed and discussed in depth.

关 键 词：g-C_(3)N_(4) 异质结 光催化 光生载流子 B掺杂 有机物降解 

分 类 号：O643.36[理学—物理化学]