光催化与离子交换吸附耦合有效去除2，4，6-三氯苯酚

doi:10.11949/0438-1157.20221613

化工学报 ›› 2023, Vol. 74 ›› Issue (4): 1587-1597.DOI: 10.11949/0438-1157.20221613

• 催化、动力学与反应器 • 上一篇下一篇

光催化与离子交换吸附耦合有效去除2，4，6-三氯苯酚

肖川宝¹(), 李林洋¹, 刘武锋¹, 钟年丙¹(), 解泉华¹, 钟登杰², 常海星²

^1.重庆理工大学，智能光纤感知技术重庆市高校工程研究中心，重庆市现代光电检测技术与仪器重点实验室，光纤传感与光电检测重庆市重点实验室，重庆 400054
^2.重庆理工大学化学化工学院，重庆 400054

收稿日期:2022-12-13 修回日期:2023-04-07 出版日期:2023-04-05 发布日期:2023-06-02
通讯作者: 钟年丙
作者简介:肖川宝（1996—），男，硕士研究生， X_ChuanBao@163.com
基金资助:
国家自然科学基金面上项目(52176178);重庆市教委科学技术研究计划重大项目(KJZD-M202201101);重庆市自然科学基金创新发展联合基金重点项目(CSTB2022NSCQ-LZX0059);重庆市高校创新研究群体项目(CXQT21035);重庆市研究生创新项目(CYS22645);重庆理工大学研究生教育高质量发展项目(gzlcx2022022)

Effective removal of 2,4,6-trichlorophenol by coupling photocatalysis with ion exchange adsorption

Chuanbao XIAO¹(), Linyang LI¹, Wufeng LIU¹, Nianbing ZHONG¹(), Quanhua XIE¹, Dengjie ZHONG², Haixing CHANG²

^1.Intelligent Fiber Sensing Technology of Chongqing Municipal Engineering Research Center of Institutions of Higher Education，Chongqing Key Laboratory of Modern Photoelectric Detection Technology and Instrument，Chongqing Key Laboratory of Fiber Optic Sensor and Photodetector，Chongqing University of Technology，Chongqing 400054，China
^2.College of Chemistry and Chemical Engineering，Chongqing University of Technology，Chongqing 400054，China

Received:2022-12-13 Revised:2023-04-07 Online:2023-04-05 Published:2023-06-02
Contact: Nianbing ZHONG

摘要/Abstract

摘要：

为了实现2, 4, 6-三氯苯酚(2, 4, 6-TCP)废水快速降解和氯离子去除，构建了光催化与离子交换吸附耦合系统。该系统由钌(Ru)、钼(Mo)双金属掺杂单晶体BiVO₄涂覆光催化石英空心光纤束和ZnAl-LDH-NO₃涂覆石英光纤布构成。研究发现：RuO₂/Mo-BiVO₄光催化剂具有粒径小且呈多孔不规则多面体结构，有助于提高光催化剂比表面积，促进光电转换及电子转移，同时Ru和Mo掺杂可有效地抑制光生电子-空穴复合，促进氧化活性物质(·OH和 $· O 2 -$ )产生，提高BiVO₄光催化活性；RuO₂/Mo-BiVO₄涂覆光催化空心光纤束6 h对200 ml、80 mg/L 2, 4, 6-TCP去除率达到62.4%，是BiVO₄涂覆光催化空心光纤束的1.56倍。在pH为6.2、温度为35℃时，单独RuO₂/Mo-BiVO₄涂覆光催化空心光纤束6 h对2, 4, 6-TCP去除率提升至74.2%、COD去除率达到43.1%、脱氯率达到40.3%(液相氯离子浓度达到443.2 μmol/L)。光催化与离子交换吸附耦合系统6 h对2, 4, 6-TCP、COD和氯离子去除率分别达到91.1%、53.8%和98.1%。

关键词: 2, 4, 6-三氯苯酚, 光催化剂, 石英空心光纤, 氯离子吸附剂, 石英光纤布, 耦合

Abstract:

In order to promote the rapid degradation of 2,4,6-trichlorophenol (2,4,6-TCP) and rapid removal of chloride ions in wastewater, a coupling system of photocatalysis and ion exchange adsorption was constructed in this study. The system consists of ruthenium (Ru), molybdenum (Mo) bimetallic doped monoclinic BiVO₄ coated photocatalytic quartz optical hollow fibers and ZnAL-LDH-NO₃ coated quartz optical fiber cloth. It is found that RuO₂/Mo-BiVO₄ photocatalyst has a porous and irregular polyhedron structure and small catalyst particle size, which helps to increase the specific surface area of the photocatalyst, promote photoelectric conversion and electron transfer, and Ru and Mo doping can effectively suppress photogenerated electron hole recombination, promoting the generation of oxidation active species (·OH and · $O 2 -$ ), and improving the photocatalytic activity of BiVO₄. RuO₂/Mo-BiVO₄ coated photocatalysis hollow fibers has a removal rate of 62.4% for 200 ml, 80 mg/L 2,4,6-TCP in 6 h, 1.56 times that of BiVO₄ coated photocatalysis hollow fibers. At pH 6.2 and temperature of 35℃, the removal rate of 2,4,6-TCP in 6 h of RuO₂/Mo-BiVO₄ coated photocatalysis hollow fibers alone has increased to 74.2%, COD removal rate has reached 43.1%, and dechlorination rate has reached 40.3% (the concentration of chloride ions in the liquid phase has reached 443.2 μmol/L). The removal rates of 2,4,6-TCP, COD and chloride ions in the coupling system of photocatalysis and ion exchange adsorption reached 91.1%, 53.8% and 98.1% respectively in 6 h.

Key words: 2,4,6-trichlorophenol, photocatalyst, quartz optical hollow fiber, chloride ion adsorbent, quartz optical fiber cloth, coupling

中图分类号:

TQ 028.8

肖川宝, 李林洋, 刘武锋, 钟年丙, 解泉华, 钟登杰, 常海星. 光催化与离子交换吸附耦合有效去除2，4，6-三氯苯酚[J]. 化工学报, 2023, 74(4): 1587-1597.

Chuanbao XIAO, Linyang LI, Wufeng LIU, Nianbing ZHONG, Quanhua XIE, Dengjie ZHONG, Haixing CHANG. Effective removal of 2,4,6-trichlorophenol by coupling photocatalysis with ion exchange adsorption[J]. CIESC Journal, 2023, 74(4): 1587-1597.

图/表 9

图1 光催化与离子交换吸附耦合反应器结构

Fig.1 Structure of photocatalysis and ion exchange adsorption coupling reactor

图2 光催化剂与光催化光纤表面形貌SEM图像

Fig.2 SEM images of surface morphology of photocatalyst and photocatalytic optical fiber

图3 光催化剂XRD和XPS表征结果

Fig.3 Characterization of photocatalysts by XRD and XPS

图4 BiVO4、Mo-BiVO4以及RuO2/Mo-BiVO4样品性能表征

Fig.4 Performance characterization of BiVO4, Mo-BiVO4 and RuO2/Mo-BiVO4 samples

图5 ZnAl-LDH-NO3氯离子吸附材料物理、光学特性及再生性能测试

Fig.5 Physical, optical properties and regeneration performance test of ZnAl-LDH-NO3 chloride ion adsorption material

图6 不同光催化光纤束降解2,4,6-TCP性能测试及最佳条件筛选

Fig.6 Performance test of different photocatalytic fiber bundles for degradation of 2,4,6-TCP and optimum conditions screening

图7 RuO2/Mo-BiVO4涂覆光催化光纤束单独光催化降解2,4,6-TCP性能

Fig.7 Performance of RuO2/Mo-BiVO4 coated photocatalytic fiber bundle for photocatalytic degradation of 2,4,6-TCP alone

图8 光催化与氯离子交换吸附剂耦合降解2,4,6-TCP性能

Fig.8 Photocatalytic degradation of 2,4,6-TCP coupled with chloride ion exchange adsorbent

表1 不同光催化剂对2，4，6-TCP的降解效率

Table 1 Degradation efficiency of 2，4，6-TCP by different photocatalysts

光催化剂	浓度/ (mg/L)	体积/ ml	光源	时间/ min	降解率/%	降解速率/ (mg/min)	文献
Ir-TiO₂ NPs	30	50	自然光	60	72.1	0.018	[37]
TBi-球状化合物	10	100	20 W UVP	240	90	0.004	[38]
Fe₃O₄@TiO₂@Au	75	20	150 W氙灯	40	97.7	0.037	[39]
CdS@TiO₂	10	100	Mic-LED-455	360	77	0.002	[40]
RuO₂/Mo-BiVO₄	80	200	50 W Vis-LED	360	91.1	0.041	本文

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光催化与离子交换吸附耦合有效去除2，4，6-三氯苯酚

Effective removal of 2,4,6-trichlorophenol by coupling photocatalysis with ion exchange adsorption

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