Hydrogel microcapsules with photocatalytic nanoparticles for removal of organic pollutants,Environmental Science: Nano

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Hydrogel microcapsules with photocatalytic nanoparticles for removal of organic pollutants
Environmental Science: Nano ( IF 5.8 ) Pub Date : 2020/01/02 , DOI: 10.1039/c9en01108k
Jinrun Liu _{1,

2,

3,

4} , Hong Chen _{1,

2,

3,

4} , Xiaojie Shi _{1,

2,

3,

4} , Saraf Nawar _{5,

6,

7,

8} , Jörg G. Werner _{5,

6,

7,

8} , Gaoshan Huang _{1,

2,

3,

4} , Miaomiao Ye _{4,

9,

10,

11,

12} , David A. Weitz _{5,

6,

7,

8,

13} , Alexander A. Solovev _{1,

2,

3,

4} , Yongfeng Mei _{1,

2,

3,

4}

Affiliation

Droplet-based microfluidics is used to fabricate thin shell hydrogel microcapsules for the removal of methylene blue (MB) from aqueous solutions. The microcapsules composed of a poly(methacrylic acid) hydrogel shell exhibit unique properties, including permeation, separation, purification, and reaction of molecular species. Photocatalytic TiO₂ and ZnO nanoparticles encapsulated in the microcapsules, i.e. photocatalyst in capsule (PIC), are used to remove organic pollutants using an adsorption–oxidation mechanism. A prototype flow microreactor is assembled to demonstrate a controllable water purification approach in short time using photocatalysts. Our studies of aqueous and homogeneous hydrogel environments for the photocatalysts provide important insights into understanding the effectiveness of MB removal. Hydrogel capsules have MB removal rate comparable to homogeneous particles. Further reduction of both capsule and photocatalyst sizes can potentially aid in quicker water purification.

中文翻译：

具有光催化纳米颗粒的水凝胶微胶囊，用于去除有机污染物

基于液滴的微流体用于制造薄壳水凝胶微胶囊，用于从水溶液中去除亚甲基蓝（MB）。由聚（甲基丙烯酸）水凝胶壳组成的微胶囊具有独特的特性，包括分子种类的渗透，分离，纯化和反应。封装在微胶囊中的光催化TiO ₂和ZnO纳米颗粒，即胶囊中的光触媒（PIC）用于通过吸附-氧化机制去除有机污染物。组装了原型流动微反应器，以演示使用光催化剂在短时间内可控的水净化方法。我们对光催化剂的水相和均相水凝胶环境的研究为理解MB去除的有效性提供了重要的见识。水凝胶胶囊的MB去除率与均质颗粒相当。进一步减小胶囊和光催化剂的尺寸都可能有助于更快地净化水。

更新日期：2020-02-20

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