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磷酸银改性二氧化钛可见光光催化性能

作者:时间:2018-04-03点击数:

PDF全文下载:  201802010.pdf

 

文章编号: 16726987201802006107 DOI 10.16351/j.16726987.2018.02.010

 

宫磊, 王在钊, 刘远峰, 王琳坤

(青岛科技大学 环境与安全工程学院,山东 青岛 266042)

 

摘要: 利用生物质瓜子皮为模板,水热法制备了纳米级二氧化钛,然后利用溶液共混法将磷酸银掺杂负载到二氧化钛上,制备出一种新型改性二氧化钛复合光催化剂,并通过扫描电镜、XRD对该催化剂进行了表征,同时将改性的催化剂用于处理亚甲基蓝染料,进而考察磷酸银改性二氧化钛在可见光下的光催化活性。得到复合材料最佳的制备条件:超声20 minn(Ag3PO4)n(TiO2)210,反应pH=7;复合材料最佳反应条件:光催化剂加入量是01 g,亚甲基蓝染料浓度为75~10 mg·L-1,且加入氧化剂时可以在提高反应速率的同时提高降解率;h+是降解亚甲基蓝的主要氧化基团,可见光下该催化剂降解亚甲基蓝的反应过程符合一级反应动力学模型,新制备出的光催化剂的光响应范围有了很大的提高,在可见光之下的降解率也可以达到95%以上。

关键词: 生物质; 光催化; 二氧化钛; 磷酸银; 亚甲基蓝

中图分类号: X 382文献标志码: A

引用格式:宫磊, 王在钊, 刘远峰, . 磷酸银改性二氧化钛可见光光催化性能\[J\]. 青岛科技大学学报(自然科学版), 2018 392): 6167.

GONG Lei, WANG Zaizhao, LIU Yuanfeng, et al. Photocatalytic properities of silver phosphate modified titania under visible light irradiation\[J\]. Journal of Qingdao University of Science and TechnologyNatural Science Edition), 2018, 39(2) 6167.

 

Photocatalytic Properities of Silver Phosphate Modified Titania

Under Visible Light Irradiation

 

GONG Lei, WANG Zaizhao, LIU Yuanfeng, WANG Linkun

(College of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao 266042, China)

 

Abstract: The nanoscale titania was prepared by the hydrothermal, using the biomass melon seed shell as the template. A silver phosphate modified titania photocatalyst was prepared by solution blending method in this paper, the product was characterized by scanning electron microscope, Xray diffraction et al, using this product treat methylene blue dye, and then examine the photocatalytic properities of silver photophate modified titania under visible light irradiation. The results show that the best preparation conditions of composite material are as follows: ultrasonic time is 20 min, the composite ratio of n(Ag3PO4)n(TiO2) is 210, and at the pH=7; the best reaction conditions are as follows: the addition amount of catalyst is 01 g, the dye content is 7510 mg·L-1, adding in oxidant could improve the reaction rate as well as the degradation rate. The h+ is the main oxidation groups on degradation of methylene blue, under visible light this catalyst degradating methylene blue is accord with the first order reaction kinetics model, the light response range of the prepared products has been greatly improved, the degradation rate can reach over 95% under visible light.

Key words: biomass; photocatalysis; titania; silver phosphate; methylene blue

 

收稿日期:  20161211

基金项目: 山东省重点研发计划项目(2017GSF16108.

作者简介: 宫磊(1976),男,副教授.

 

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