PW<sub>11</sub>Cu/TiO<sub>2</sub>膜光催化剂的制备及可见光催化性能

引用本文: 邹晓梅, 陈启胜, 柯小雪, 雷琴, 赵梓铭, 刘希龙, 陈艳, 华英杰, 王崇太. PW₁₁Cu/TiO₂膜光催化剂的制备及可见光催化性能[J]. 无机化学学报, 2015, 31(10): 2037-2043. doi: 10.11862/CJIC.2015.232 shu

Citation: ZOU Xiao-Mei, CHEN Qi-Sheng, KE Xiao-Xue, LEI Qin, ZHAO Zi-Ming, LIU Xi-Long, CHEN Yan, HUA Ying-Jie, WANG Chong-Tai. PW₁₁Cu/TiO₂ Film Photocatalyst: Preparation and Visible Photocatalytic Performance[J]. Chinese Journal of Inorganic Chemistry, 2015, 31(10): 2037-2043. doi: 10.11862/CJIC.2015.232 shu

PW₁₁Cu/TiO₂膜光催化剂的制备及可见光催化性能

1.
海南师范大学化学与化工学院, 海口 571158

通讯作者: 华英杰,E-mail:521000hua282@sina.com;王崇太,E-mail:wct581@sina.com; 华英杰,E-mail:521000hua282@sina.com;王崇太,E-mail:wct581@sina.com

基金项目:
国家自然科学基金(No.21161007) (No.21161007)

海南省国际科技合作重点项目(No.2012-GH004

KJHZ2014-08)

海南省应用技术研究与开发专项(No.ZDXM20130088

ZDXM2014099)

国家大学生创新训练项目(No.201411658027)资助。 (No.201411658027)

摘要: 以PW₁₁Cu为可见光活性组分,TiO₂为载体结构组分,采用溶胶-凝胶法制备了PW₁₁Cu/TiO₂复合膜可见光催化剂,并用UV-Vis DRS、IR、Raman、XRD、SEM、TEM等手段对催化剂的光吸收性质、化学组成、晶相、表面结构和形貌进行了表征,同时,以模型污染物RhB的可见光降解为探针评估了它的光催化活性,考察了膜处理温度、PW₁₁Cu含量和溶液酸性对催化活性的影响,最后,通过催化剂循环降解RhB试验评估了PW₁₁Cu/TiO₂膜的稳定性。实验结果表明,PW₁₁Cu/TiO₂膜对可见光有明显吸收,低温(100℃)处理的膜为无定形态,高温(500℃)处理的膜为多晶态;低温处理的膜具有较高的可见光催化活性,用于RhB的可见光催化降解,在中性条件下反应80 min,RhB的降解率为100%,TOC去除达32%(4 h);提高溶液酸性有利于催化剂活性的提高,在pH=2.5的条件下,达到100%的RhB降解仅需30 min。在本实验条件下,PW₁₁Cu的最佳剂量是3.0 g。经过10次循环降解RhB,催化剂的光催化活性仍保留约90%。

关键词:

Keggin型铜取代杂多酸盐;二氧化钛;可见光催化剂;RhB降解;溶胶-凝胶法

English

PW₁₁Cu/TiO₂ Film Photocatalyst: Preparation and Visible Photocatalytic Performance

1.
School of Chemistry and Chemical Engineering, Hainan Normal University, Haikou 571158, China

Corresponding author: 华英杰,E-mail:521000hua282@sina.com;王崇太,E-mail:wct581@sina.com; 华英杰,E-mail:521000hua282@sina.com;王崇太,E-mail:wct581@sina.com

Received Date: 17 April 2015
Fund Project:
国家自然科学基金(No.21161007)

海南省国际科技合作重点项目(No.2012-GH004

KJHZ2014-08)

海南省应用技术研究与开发专项(No.ZDXM20130088

ZDXM2014099)

国家大学生创新训练项目(No.201411658027)资助。

Abstract: A PW₁₁Cu/TiO₂ composite film photocatalyst was prepared on the surface of a glass slide via the sol-gel dipping pulling method using tetrabutyl titanate Ti(OC₄H₉)₄ as the precursor of TiO₂ and the Keggin type copper substituted heteropolyanion PW₁₁Cu as the visible light active component in this paper. Then the light absorption properties, the chemical composition, the crystal phase and the surface morphology of the as-prepared catalyst were characterized using UV-Vis DRS, IR, XRD, SEM and TEM. Meanwhile, the visible photocatalytic activity of the catalyst was assessed using the photocatalytic degradation of RhB, a model pollutant, as a probe. Influences of the calcination temperature,the PW11Cr dosage and the solution pH on the catalyst activity were also examined. In the end, a recycle test of the catalyst for RhB degradation was employed to evaluate the stability of the catalyst. Experimental results show that the PW₁₁Cu/TiO₂ photocatalyst has a good absorption to visible light. The film yielded at low calcination temperature (100℃) is amorphous and crystalline at high calcination temperature (500℃). The former has higher photocatalytic activity, and was employed to degrade RhB with a concentration of 10 μmol·L^-1 under the irradiation of 200 W metal halide lamp, the degradation ratio was about 100% at 80 min and the TOC removal was 32% at 4 h. High solution acidity is favorable to enhancement of the photocatalytic activity of the PW₁₁Cu/TiO₂ film. Reaching 100% of RhB degradaion only needed 30 min at pH=2.5. The optimal PW₁₁Cu dosage is 3.0 g under the experimental conditions. The photocatalytic activity of the PW₁₁Cu/TiO₂ film remains about 90% after 10 times recycles for RhB degradaion.

Key words:

Keggin-type Cu-substituted heteropolyoxometallate;TiO₂;visible photocatalyst;rhodamine B degradation;the sol-gel method

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PW₁₁Cu/TiO₂膜光催化剂的制备及可见光催化性能

通讯作者: 华英杰,E-mail:521000hua282@sina.com;王崇太,E-mail:wct581@sina.com; 华英杰,E-mail:521000hua282@sina.com;王崇太,E-mail:wct581@sina.com

English

PW₁₁Cu/TiO₂ Film Photocatalyst: Preparation and Visible Photocatalytic Performance

Corresponding author: 华英杰,E-mail:521000hua282@sina.com;王崇太,E-mail:wct581@sina.com; 华英杰,E-mail:521000hua282@sina.com;王崇太,E-mail:wct581@sina.com

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通讯作者: 陈斌, bchen63@163.com

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PW11Cu/TiO2膜光催化剂的制备及可见光催化性能

通讯作者: 华英杰,E-mail:521000hua282@sina.com;王崇太,E-mail:wct581@sina.com; 华英杰,E-mail:521000hua282@sina.com;王崇太,E-mail:wct581@sina.com

English

PW11Cu/TiO2 Film Photocatalyst: Preparation and Visible Photocatalytic Performance

Corresponding author: 华英杰,E-mail:521000hua282@sina.com;王崇太,E-mail:wct581@sina.com; 华英杰,E-mail:521000hua282@sina.com;王崇太,E-mail:wct581@sina.com

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CCS Chemistry：颜徐州、鲍哲南： 你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

PW₁₁Cu/TiO₂膜光催化剂的制备及可见光催化性能

PW₁₁Cu/TiO₂ Film Photocatalyst: Preparation and Visible Photocatalytic Performance

CCS Chemistry：颜徐州、鲍哲南：你的皮肤可能是一片SPMs