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| 1 | g-C_3N_4光催化降解2,4-DCP的活性及机理显示文摘以三聚氰胺(Melamine)为原料,在高温条件下采用热缩合反应合成了石墨型氮化碳(g-C_3N_4)光催化剂.通过X-射线衍射(XRD)、扫描电镜(SEM)、紫外-可见漫反射光谱(UV-Vis DRS)、衰减全反射红外光谱(ATR-IR)等技术对其物理结构及性质进行了表征,结果表明实验制备的g-C_3N_4为片层状结构,比表面积为15.34 m^2·g^(-1).在可见光(λ>420 nm)照射下,用g-C_3N_4降解有机小分子污染物2,4-二氯苯酚(2,4-Dichlorophenol,2,4-DCP),该过程反应符合一级动力学,反应速率常数为0.0113 min^(-1),以0.67 g·L^(-1)的用量反应250 min后2,4-DCP矿化率达到60%;2,4-DCP在弱酸性条件下(p H=5.4)的降解效率最高;通过捕获实验及电子自旋共振(ESR)实验表明,超氧自由基(O·-2)是g-C_3N_4光催化降解2,4-DCP过程中的主要活性物种.2,4-DCP的降解路径主要涉及脱氯、苯环开环和碳链断裂等反应历程. | 吴斌 方艳芬 任慧君 赵萍 黄应平 | 2017 | 环境化学2017，36，7： | 7 |
| 2 | Review on design and evaluation of environmental photocatalysts显示文摘Heterogeneous photocatalysis has long been considered to be one of the most promising approaches to tackling the myriad environmental issues.However,there are still many challenges for designing efficient and cost-effective photocatalysts and photocatalytic degradation systems for application in practical environmental remediation.In this review,we first systematically introduced the fundamental principles on the photocatalytic pollutant degradation.Then,the important considerations in the design of photocatalytic degradation systems are carefully addressed,including charge carrier dynamics,catalytic selectivity,photocatalyst stability,pollutant adsorption and photodegradation kinetics.Especially,the underlying mechanisms are thoroughly reviewed,including investigation of oxygen reduction properties and identification of reactive oxygen species and key intermediates.This review in environmental photocatalysis may inspire exciting new directions and methods for designing,fabricating and evaluating photocatalytic degradation systems for better environmental remediation and possibly other relevant fields,such as photocatalytic disinfection,water oxidation,and selective organic transformations. | Xin Li Jun Xie Chuanjia Jiang Jiaguo Yu Pengyi Zhang | 2018 | Frontiers of Environmental Science & Engineering2018，12，5： | 4 |
| 3 | 超声波合成三(4-乙酰氨基苯基)甲烷显示文摘为了减少三(4-乙酰氨基苯基)甲烷的合成时间并且提高其收率,将反应环境转移至超声波中,利用超声波的空化作用,及其伴随出现的化学效应和机械效应替代水浴搅拌加热的方法。采用红外显微光谱仪分析产物中是否有乙酰氨基生成;在不同时间、温度和反应物质量比条件下,采用高效液相色谱-质谱联用仪分析反应物转化率、反应产物三(4-乙酰氨基苯基)甲烷的收率及组成成分;采用傅立叶变换核磁共振谱仪对提纯后的三(4-乙酰氨基苯基)甲烷进行检测和确认。结果表明,将反应环境设置在超声波中,不仅可以大幅度降低反应时间,还可以减少副产物的生成,提高了产物收率,降低能耗,避免了环境污染。 | 李宏达 张连红 蒋林时 肖宏 | 2019 | 辽宁石油化工大学学报2019，39，5： | 2 |
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