研究报告
盛寒祯,尤宏,柳锋,覃琦清,韩红卫,李之鹏.可见光驱动下氧掺杂氮化碳活化过硫酸盐降解罗丹明B[J].环境科学学报,2020,40(8):2708-2714
可见光驱动下氧掺杂氮化碳活化过硫酸盐降解罗丹明B
- Degradation of Rhodamine B by persulfate activated by oxygen-doped carbon nitride under visible light irradation
- 基金项目：国家自然科学基金（No.51408158）；山东省自然科学基金（No.ZR2017MEE020）
- 作者
- 单位
- 盛寒祯
- 哈尔滨工业大学(威海)海洋科学与技术学院, 威海 264209
- 尤宏
- 1. 哈尔滨工业大学(威海)海洋科学与技术学院, 威海 264209;2. 哈尔滨工业大学城市水资源与水环境国家重点实验室, 哈尔滨 150090
- 柳锋
- 哈尔滨工业大学(威海)海洋科学与技术学院, 威海 264209
- 覃琦清
- 哈尔滨工业大学(威海)海洋科学与技术学院, 威海 264209
- 韩红卫
- 济南市环境监控中心, 济南 250000
- 李之鹏
- 哈尔滨工业大学(威海)海洋科学与技术学院, 威海 264209
- 摘要：采用双氧水溶剂热处理法处理石墨相氮化碳（g-C3N4）合成氧掺杂石墨相氮化碳（O-g-C3N4），并通过SEM、XRD、XPS、UV-visDRS等技术手段对O-g-C3N4进行表征.结果表明，O-g-C3N4表面光滑度降低，纳米片层呈现阶梯状形貌，可见光吸收性能和催化性能有了明显提高.同时，该改性方法能够有效地通过取代sp2杂化N原子的方式将O原子掺杂到g-C3N4中.以波长为430 nm的LED灯作为可见光光源，将O-g-C3N4用于活化过硫酸盐降解罗丹明B（RhB）.结果表明，该实验体系能够大幅度提高RhB的去除率.当所加LED灯的电源功率为18.00 W，O-g-C3N4投加量为0.08 g·L-1，PS投加量为1.428 g·L-1，溶液初始pH为5.6时，反应30 min后，浓度为10 mg·L-1的RhB的降解率可以达到97.8%，矿化率可达9.738%.
- Abstract：Oxygen-doped graphite-phase carbon nitride (O-g-C3N4) was synthesized by treatment of graphite-phase carbon nitride (g-C3N4) with hydrogen peroxide solution heat treatment, and O-g-C3N4 was characterized by SEM, XRD, XPS, UV-visDRS. The results show that the surface smoothness of O-g-C3N4 is reduced, the nanosheets have a step-like morphology, and the visible light absorption performance and catalytic performance have been significantly improved. Meanwhile, hydrogen peroxide solvent thermal treatment could effectively doped O atoms into g-C3N4 by replacing sp2 bonding N atoms. Using an LED lamp with a wavelength of 430 nm as a visible light source, O-g-C3N4 is used to activate persulfate to degrade rhodamine B (RhB). The results show that the experimental system can greatly improve the removal rate of RhB. The optimal reaction conditions were the applied light source power of 18.00 W, the O-g-C3N4 dosage of 0.08 g·L-1, the PS dosage of 1.428 g·L-1, and the initial pH of 5.60. Under the above conditions, the removal efficiency of RhB could reach 97.8%, and the mineralization efficiency could achieve 9.738% after 30 min of reaction.
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