Page 76 - 《精细化工》2021年第3期
P. 76
第 38 卷第 3 期 精 细 化 工 Vol.38, No.3
202 1 年 3 月 FINE CHEMICALS Mar. 2021
功能材料
WO /C/Ag PO 复合材料光催化降解双酚 A
3
4
3
*
卜鑫焱,黄权龙,赵西连,高雯婷,陈丛瑾 ,李志霞
(广西大学 化学化工学院,广西石化资源加工及过程强化技术重点试验室,广西 南宁 530004)
摘要:以磷酸法制备的活性炭、WO 3 、AgNO 3 、Na 2 HPO 4 •12H 2 O 为原料,采用共沉淀法制备 WO 3 与 C 不同含
量的系列 WO 3 /C/Ag 3 PO 4 复合材料。采用 XRD、FTIR、XPS、SEM、TEM 和固体紫外漫反射(UV-DRS)技术
对其进行了结构表征。在可见光照射下,以双酚 A(BPA)模拟污染物,评价 WO 3 /C/Ag 3 PO 4 复合材料的光催化降
解性能,并提出 WO 3 /C/Ag 3 PO 4 复合材料对 BPA 的光降解机理。结果表明,Ag 3 PO 4 与 WO 3 之间形成了异质结。
在一系列光催化剂中,20 mg 的 WO 3 /C/Ag 3 PO 4 (1∶0.3∶3)(WO 3 、C 与 Ag 3 PO 3 质量比为 1∶0.3∶3)复合材
料在可见光下对 40 mL 10 mg/L BPA 水溶液的降解率在 90 min 达到 95%以上,明显高于单一的 Ag 3 PO 4 和 WO 3 。
经过 3 次循环实验,BPA 的降解率仍能保持在 74%,表明 WO 3 /C/Ag 3 PO 4 光催化剂具有较好的稳定性。光催化
+
机理表明,•OH 和空穴(h )在降解过程中起主要作用。
关键词:双酚 A;Ag 3 PO 4 ;复合材料;异质结;光催化机理;功能材料
中图分类号:X52;X703;O643.3 文献标识码:A 文章编号:1003-5214 (2021) 03-0496-08
WO 3/C/Ag 3PO 4 composites for photocatalytic degradation of bisphenol A
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BU Xinyan, HUANG Quanlong, ZHAO Xilian, GAO Wenting, CHEN Congjin , LI Zhixia
(Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, School of
Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, Guangxi, China)
Abstract: A series of WO 3/C/Ag 3PO 4 composites with different contents of WO 3 and activated carbon
prepared by phosphoric acid method were prepared by coprecipitation method with prepared activated
carbon, WO 3, AgNO 3 and Na 2 HPO 4 •12H 2 O as raw materials. The samples were characterized by XRD,
FTIR, XPS, SEM, TEM and UV-DRS techniques. The photocatalytic properties of WO 3/C/Ag 3PO 4
composites were evaluated by using bisphenol A (BPA) to simulate pollutant under visible light irradiation,
and the photodegradation mechanism of WO 3/C/Ag 3PO 4 composites was proposed. The results showed that
a heterojunction was formed between Ag 3PO 4 and WO 3. Among a series of photocatalysts, the degradation
rate of 10 mg/L BPA (40 mL) aqueous solution by 20 mg WO 3/C/Ag 3PO 4 (1∶0.3∶3) [m(WO 3)∶m(C)∶
m(Ag 3PO 4)=1∶0.3∶3] composites reached more than 95% in 90 min under visible light, which was
significantly higher than that by single Ag 3PO 4 and WO 3. After three cycles, the degradation rate of BPA
remained at 74%, indicating WO 3/C/Ag 3PO 4 photocatalyst had good stability. The research on
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photocatalytic mechanism indicated that •OH and hole(h ) played major roles in the degradation process.
Key words: bisphenol A; Ag 3PO 4; composites; heterojunction; photocatalytic mechanism; functional
materials
[3]
内分泌干扰性化学物质(Endocrine disrupting 型代表的内分泌干扰物 ,在自然环境中能够持续
chemicals,EDC)是一类模仿天然激素干扰内分泌 释放和广泛分布,所以如何将其从水、食物、环境
[1]
系统的外源性化学物质 ,可以通过环境或从食物 中去除是一个必要且具有挑战性的难题。近年来,
中摄取而进入生物体,对人类和野生动植物的繁殖 半导体光催化技术被认为是用于环境修复的最有效
[2]
造成巨大的潜在威胁 。双酚 A(Bisphenol A)作为典 手段之一。由于太阳能具有低廉、丰富、无污染、
收稿日期:2020-08-25; 定用日期:2020-11-04; DOI: 10.13550/j.jxhg.20200794
基金项目:国家自然科学基金(31660183);广西石化资源加工及过程强化技术重点实验室开放基金(2020k003)
作者简介:卜鑫焱(1995—),男,硕士生,E-mail:964262862@qq.com。联系人:陈丛瑾(1970—),女,教授,E-mail:gxdxccj@163.com。