许凯^1,,
杨胜楠¹,
沈忱思^1,2,
李方^1,2,
马春燕^1,2,
蒋晨晖³
1.东华大学环境科学与工程学院，国家环境保护纺织工业污染防治工程技术中心，上海 201620
2.上海污染控制与生态安全研究院，上海 200092
3.中交上海航道勘察设计研究院有限公司，上海 200120
基金项目: 省部共建分离膜与膜过程国家重点实验室(天津工业大学)开放课题M2-201709
上海市自然科学基金资助项目18ZR1401000
上海市浦江人才计划18PJ1400400
国家重点研发计划2018YFF0215703省部共建分离膜与膜过程国家重点实验室(天津工业大学)开放课题(M2-201709)
上海市自然科学基金资助项目(18ZR1401000)
上海市浦江人才计划(18PJ1400400)
国家重点研发计划(2018YFF0215703)

Continuous-flow photocatalysis with Ag/AgCl modified carbon nanotubes filter towards methylene blue removal from water

XU Kai^1,,
YANG Shengnan¹,
SHEN Chensi^1,2,
LI Fang^1,2,
MA Chunyan^1,2,
JIANG Chenhui³
1.Textile Pollution Controlling Engineering Center of Ministry of Environmental Protection, College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China
2.Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China
3.Shanghai Waterway Engineering Design and Consulting Co.Ltd., Shanghai 200120, China

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摘要:为了探究Ag/AgCl光催化薄膜在连续流状态下对有机污染物的光催化性能，采用连续沉积方法制备了Ag/AgCl改性碳纳米管(CNTs)薄膜，以亚甲基蓝为目标污染物，利用光化学过滤器对亚甲基蓝的光催化脱色效果进行了探究。结果表明，在900 μW·cm-2光强下，Ag/AgCl-CNTs复合薄膜在连续流光催化体系中对10 mg·L-1的亚甲基蓝去除率可达90%，比传统序批式反应体系高出70%以上，说明连续流体系的对流传质效果明显优于序批式体系的扩散传质效果。同时，Ag/AgCl的沉积显著改善了CNTs薄膜的光催化脱色性能。在最佳实验条件下，Ag/AgCl改性后，复合薄膜的光催化脱色效果比CNTs薄膜提高了40%。Ag/AgCl-CNTs多功能复合薄膜体系具有光催化降解和膜分离以及减缓膜污染等多重特性。
关键词: 水污染防治/
碳纳米管薄膜/
连续流光催化/
亚甲基蓝降解

Abstract:To investigate the photocatalytic performance of Ag/AgCl photocatalytic filters towards organic pollutants degradation under continuous-flow conditions, the Ag/AgCl modified carbon nanotubes (CNTs) filters were prepared by using the sequential deposition method, and the photocatalytic decolorization effect of the photochemical filter was studied when methylene blue (MB) was taken as a model compound. The results showed that the MB removal efficiency could reach 90% for the Ag/AgCl-CNTs hybrid filters in a continuous-flow photocatalysis system towards 10 mg·L-1 MB solution at illumination intensity of 900 μW·cm-2, which was above 70% higher than that of conventional batch reactor. This indicated that the convection mass transfer effect in the former system was better than the diffusive mass transfer effect in the latter. Moreover, Ag/AgCl modification significantly improved the photocatalytic decolorization performance of Ag/AgCl-CNTs hybrid filters, and the decolorization efficiency of the hybrid filters was 40% higher than that of a CNT-alone filter under the optimal conditions. The Ag/AgCl-CNTs multifunctional composite filter system has multiple characteristics such as photocatalytic degradation, membrane separation and membrane fouling mitigation.
Key words:water pollution prevention/
CNTs filter/
continuous-flow photocatalysis/
methylene blue degradation.

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刊出日期:2019-06-18

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Ag/AgCl改性碳纳米管薄膜连续流光催化去除水中亚甲基蓝

许凯^1,,
杨胜楠¹,
沈忱思^1,2,
李方^1,2,
马春燕^1,2,
蒋晨晖³
1.东华大学环境科学与工程学院，国家环境保护纺织工业污染防治工程技术中心，上海 201620
2.上海污染控制与生态安全研究院，上海 200092
3.中交上海航道勘察设计研究院有限公司，上海 200120
基金项目: 省部共建分离膜与膜过程国家重点实验室(天津工业大学)开放课题M2-201709 上海市自然科学基金资助项目18ZR1401000 上海市浦江人才计划18PJ1400400 国家重点研发计划2018YFF0215703省部共建分离膜与膜过程国家重点实验室(天津工业大学)开放课题(M2-201709) 上海市自然科学基金资助项目(18ZR1401000) 上海市浦江人才计划(18PJ1400400) 国家重点研发计划(2018YFF0215703)
关键词: 水污染防治/
碳纳米管薄膜/
连续流光催化/
亚甲基蓝降解
摘要:为了探究Ag/AgCl光催化薄膜在连续流状态下对有机污染物的光催化性能，采用连续沉积方法制备了Ag/AgCl改性碳纳米管(CNTs)薄膜，以亚甲基蓝为目标污染物，利用光化学过滤器对亚甲基蓝的光催化脱色效果进行了探究。结果表明，在900 μW·cm-2光强下，Ag/AgCl-CNTs复合薄膜在连续流光催化体系中对10 mg·L-1的亚甲基蓝去除率可达90%，比传统序批式反应体系高出70%以上，说明连续流体系的对流传质效果明显优于序批式体系的扩散传质效果。同时，Ag/AgCl的沉积显著改善了CNTs薄膜的光催化脱色性能。在最佳实验条件下，Ag/AgCl改性后，复合薄膜的光催化脱色效果比CNTs薄膜提高了40%。Ag/AgCl-CNTs多功能复合薄膜体系具有光催化降解和膜分离以及减缓膜污染等多重特性。

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