纺织学报 ›› 2020, Vol. 41 ›› Issue (12): 102-110.doi: 10.13475/j.fzxb.20200306909

• 染整与化学品 • 上一篇    下一篇

可见光激发降解甲基橙的光催化漂浮球的制备

宋英琦, 潘家豪, 吴礼光, 王挺(), 董春颖   

  1. 浙江工商大学 环境科学与工程学院, 浙江 杭州 310012
  • 收稿日期:2020-03-25 修回日期:2020-08-03 出版日期:2020-12-15 发布日期:2020-12-23
  • 通讯作者: 王挺
  • 作者简介:宋英琦(1982—), 女, 实验师, 硕士。主要研究方向为环境工程污染治理。
  • 基金资助:
    国家自然科学基金资助项目(21776250);浙江省自然科学基金资助项目(LY19B060004);浙江省自然科学基金资助项目(LY20B060001);2020年度高校实验室工作研究项目(ZD202004)

Fabrication of photocatalytic floating spheres for degradation of methyl-orange under illumination of visible light

SONG Yingqi, PAN Jiahao, WU Liguang, WANG Ting(), DONG Chunying   

  1. School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, Zhejiang 310012, China
  • Received:2020-03-25 Revised:2020-08-03 Online:2020-12-15 Published:2020-12-23
  • Contact: WANG Ting

摘要:

为推广多相光催化技术在特殊废水深度治理中的应用,采用耦合吸附相反应技术和热还原处理制备了高活性的可见光响应的贵金属沉积光催化组分。将该光催化组分负载于多孔聚氨酯海绵颗粒表面后,填充至聚丙烯空心球中构建漂浮式光催化球,并用于高含盐废水中甲基橙的光降解。结果表明:通过吸附相反应技术可在TiO2光催化剂表面沉积小粒径且与TiO2表面紧密结合的贵金属纳米粒子,从而在光催化组分中引入费米能级并形成表面等离子体共振效应,增强光催化组分在可见光激发下对高含盐废水中甲基橙的降解性能;由于贵金属沉积光催化组分的高效降解性能,其负载后构建的漂浮式光催化球也能稳定高效地降解高含盐废水中的甲基橙。

关键词: 吸附相反应技术, 贵金属沉积, 可见光光降解, 漂浮式光催化球, 高含盐废水, 废水处理

Abstract:

In order to extend the application of heterogeneous photocatalytic technology in deep level treatment for special wastewater, a visible light-driven photocatalytic component deposited by visible light with high performance was prepared via adsorbed-layer nanoreactor synthesis coupling with thermal reduction treatment. Followed that, the porous polyurethane sponge particle was firstly employed as a carrier to load the photocatalytic component, and the supported polyurethane sponge was filled into a polypropylene hollow sphere to fabricate a floating photocatalytic sphere for photodegrading methyl-orange in high saline waste water. The results show that noble metal nanoparticles with small size could be deposited on the surface of TiO2 closely combined with TiO2 by adsorbed-layer nanoreactor synthesis. Due to the introduction of the Fermi level and the plasmon resonance effect into the photocatalytic components, the degradation performance for methyl orange is enhanced in highly saline wastewater illuminated by visible light. Because of loading by noble metal deposition photocatalytic components with high performance, the resulting floating photocatalytic spheres could also stably and efficiently degrade methyl orange in highly saline wastewater.

Key words: adsorbed-layer nanoreactor synthesis, noble metal deposition, photocatalysis irradiated by visible light, floating photocatalytic sphere, high saline wastewater, wastewater treatment

中图分类号: 

  • O647

表1

光催化复合组分反应物的加入量"

催化剂
名称
反应物 NaOH加入量
名称 加入量
Ag-P25 硝酸银 36.52 8.70
Au-P25 氯金酸 21.27 21.27
Pt-P25 氯铂酸 32.41 32.41

图1

负载光催化组分前后的聚氨酯海绵颗粒和填充漂浮球"

图2

填充式光催化漂浮球的构建示意图 注:a—P25; b—贵金属沉积光催化组分; c—负载光催化组分的聚氨酯; d—填充式光催化漂浮球。"

图3

高含盐废水中漂浮球光催化降解甲基橙的过程和降解曲线"

图4

不同光催化组分的透射电镜照片"

图5

不同光催化组分的红外光谱图"

图6

不同光催化组分的X射线衍射谱图"

图7

Ag-P25的XPS-Ag3d和XPS-Ti2p 图谱"

图8

Au-P25的XPS-Au4f和XPS-Ti2p 图谱"

图9

Pt-P25的XPS-Pt4f 和 XPS-Ti2p 图谱"

图10

不同光催化组分的紫外漫反射光谱"

图11

不同光催化组分的光致发光光谱"

图12

高含盐废水中不同光催化组分的光降解甲基橙曲线"

图13

不同高含盐废水中Pt-P25光降解甲基橙曲线"

图14

负载不同量Pt-P25的漂浮球光催化降解高含盐废水中甲基橙"

图15

多孔聚氨酯海绵离心上层清液得到的粉末"

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