鳞片状BiVO4不锈钢网涂层的制备及其在油水分离中的应用

doi:10.16085/j.issn.1000-6613.2020-1349

化工进展 ›› 2021, Vol. 40 ›› Issue (6): 3536-3542.DOI: 10.16085/j.issn.1000-6613.2020-1349

鳞片状BiVO₄不锈钢网涂层的制备及其在油水分离中的应用

辛玥(), 宋爽, 张芝蕾, 张庆霞, 吕中, 杨浩()

武汉工程大学环境生态与生物工程学院，绿色化工过程教育部重点实验室，湖北武汉 430205

收稿日期:2020-07-14 修回日期:2020-10-09 出版日期:2021-06-06 发布日期:2021-06-22
通讯作者: 杨浩
作者简介:辛玥（1999—），女，本科生，研究方向为特殊浸润性油水分离材料的开发。E-mail：xinyue_1999@163.com。
基金资助:
国家级大学生创新创业训练项目(201910490024);武汉工程大学大学生校长基金(2019167)

Preparation of scale-like BiVO₄ coated mesh and its application in oil-water separation

XIN Yue(), SONG Shuang, ZHANG Zhilei, ZHANG Qingxia, LYU Zhong, YANG Hao()

Key Laboratory for Green Chemical Process of Ministry of Education, School of Environmental Ecology and Biological Engineering, Wuhan Institute of Technology, Wuhan 430205, Hubei, China

Received:2020-07-14 Revised:2020-10-09 Online:2021-06-06 Published:2021-06-22
Contact: YANG Hao

摘要/Abstract

摘要：

随着石油泄漏事故的频繁发生和工业含油废水的大量排放，现代化工油水分离问题日益突出。具有特殊润湿性的材料可以选择性透过水或油，分离效率高且操作简单而广泛应用于油水分离。本文以不锈钢网为基底，通过液相法可控制备得到具有不同尺寸、排列的BiVO₄纳米片涂层。通过扫描电子显微镜、原子力显微镜、接触角测量仪对其表面形貌与润湿性能进行表征，研究BiVO₄纳米片尺寸和排列对水下疏油性能的影响。结果表明当不锈钢网表面均匀生长着鳞片状BiVO₄，且这些纳米片随机放射排列时，涂层水下油接触角达到了165.1°，倾斜角仅为2.0°，具有水下超疏油性质。将该涂层用于油水混合物的分离，分离效率均在95.0%以上且分离通量最大可达1.4×10⁴L/(m²·h)，在油水分离领域展现出巨大的应用潜力。

关键词: 纳米结构, 膜, 钒酸铋, 水下超疏油, 油水分离

Abstract:

Oil/water separation in modern chemical industry become an increasingly significant issue because of the frequent oil spills and large amounts of oily industrial waste water. Materials with special wettability have highly selectivity on oil or water permeation, high separation efficiency and advantage of easy operation, therefore they have been extensively used in oil/water separation application. Herein, different sizes and arrays of BiVO₄ coated mesh were synthesized by liquid phase method. The surface morphology and wettability were characterized by scanning electronic microscopy (SEM), atomic force microscopy (AFM) and contact angle meter, and the effects of the size and array of BiVO₄ on underwater oleophobic property were studied. Results showed that when scale-like BiVO₄ grew on stainless steel mesh uniformly, and these nanosheets were randomly and radially arranged, the underwater oil contact angle and the sliding angle of the coating were 165.1° and 2°, respectively, which proved its underwater superoleophobic property. A series of oil-water mixtures were separated by the BiVO₄ coated mesh, the separation efficiencies of all the mixtures were over 95.0%, and the separation flux was up to 1.4×10⁴L/(m²·h). Therefore, it has great potential application in the field of oil-water separation industry.

Key words: nanostructure, membrane, bismuth vanadium tetraoxide (BiVO₄), underwater superoleophobic, oil/water separation

中图分类号:

O647.5

辛玥, 宋爽, 张芝蕾, 张庆霞, 吕中, 杨浩. 鳞片状BiVO₄不锈钢网涂层的制备及其在油水分离中的应用[J]. 化工进展, 2021, 40(6): 3536-3542.

XIN Yue, SONG Shuang, ZHANG Zhilei, ZHANG Qingxia, LYU Zhong, YANG Hao. Preparation of scale-like BiVO₄ coated mesh and its application in oil-water separation[J]. Chemical Industry and Engineering Progress, 2021, 40(6): 3536-3542.

图/表 7

图1 M1、M2和M3的SEM图

图2 不同BiVO4不锈钢网涂层在水下的油润湿性

图3 BiVO4的XRD图

图4 BiVO4的FTIR图

图5 BiVO4在不同扫描范围的AFM图

图6 不同有机溶剂和油在M3样品表面的水下接触角

图7 BiVO4不锈钢网的油水分离实验

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鳞片状BiVO₄不锈钢网涂层的制备及其在油水分离中的应用

Preparation of scale-like BiVO₄ coated mesh and its application in oil-water separation

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