文章信息/Info

Title:

Research Progress on Immobilized ZnO Nanostructures for Environmental Photocatalysis

作者:

劉陽思1; 2; 席曉麗1; 2

（1. 北京工業大學材料科學與工程學院 新型功能材料教育部重點實驗室，北京 100124）（2. 北京工業大學 工業大數據應用技術國家工程實驗室，北京 100124）

Author(s):

LIU Yangsi1; 2;  XI Xiaoli1; 2

(1. College of Material Science and Engineering, Key Laboratory of Advanced Functional Materials ofMinistry of Education, Beijing University of Technology, Beijing 100124, China)(2. National Engineering Laboratory for Industrial Big�睤ata Application Technology,Beijing University of Technology, Beijing 100124, China)

關鍵詞:

氧化鋅; 固載化; 納米結構; 環境; 光催化

Keywords:

zinc oxide;  immobilization;  nanostructures;  environment;  photocatalysis

DOI:

10.7502/j.issn.1674-3962.2019.04.07

文獻標志碼:

A

摘要:

光催化技術是解決當今環境污染問題的最有效途徑之一。氧化鋅（ZnO）作為一種重要的n型寬禁帶半導體，不僅具有優異的光電性質，而且包含豐富的納米結構，在光催化領域受到廣泛關注。通常用作光催化劑的ZnO納米材料是以粉體形式呈現，使用后需經過離心和過濾等回收工序，還容易造成二次污染。將ZnO納米結構固定在可以移動的基底上，形成固載型的光催化劑，可以避免上述麻煩。從基本“結構單元”的維度的角度出發，綜述了用于環境光催化的固載型ZnO納米結構，包括零維、一維、二維和三維結構。零維結構主要是固定后的納米顆粒，一維和二維結構分別以納米棒和納米片陣列為主，三維結構由低維度形態組合而成，大多形成復雜的分級結構。最后對固載型ZnO納米結構在環境光催化的實際應用中所面臨問題和挑戰進行了展望。

Abstract:

Photocatalysis is regarded as one of the most promising strategies to solve the current environmental pollution. Zinc oxide (ZnO), as an important n�瞭ype wide band gap semiconductor, not only has excellent photoelectric properties, but also contains rich nanostructures, which has attracted wide attention in the field of photocatalysis. Usually, ZnO nanomaterials used as photocatalysts are presented in the form of powders, which need to be recovered by centrifugation and filtration after use, and is liable to cause the secondary pollution. The above troubles can be avoided by fixing ZnO nanostructures on movable substrates to form immobilized photocatalysts. From the perspective of basic “structural unit” dimension, the immobilized ZnO nanostructures for environmental photocatalysis, including zero, one, two and three�瞕imensional structures, are reviewed. The zero�瞕imensional structure is mainly fixed nanoparticles. The one�瞕imensional and two�瞕imensional structures are mainly nanorods and nanosheet arrays, respectively. The three�瞕imensional structures are composed of low�瞕imensional morphologies, and most of them form complex hierarchical structures. Finally, the problems and challenges in the practical application of immobilized ZnO nanostructures in environmental photocatalysis are prospected.