摘要近年来，光催化技术的应用领域在不断地扩大，尤其是在环境污染治理方面尤其突出。作为光催化材料之一的WO3，因其优良的性能引人注目。本文探讨了利用水热合成法来制备出不同形貌的WO3纳米光催化剂。经过450度高温煅烧后，在400W汞灯照射下1。5h内对酸性大红GR进行降解，比较了不同形貌WO3光催化剂的降解率，并讨论了在导电玻璃、Zn片、钨片、基底片上WO3光催化剂的性能区别。实验结果表明，在未添加结构导向剂的情况下，制备出了针状、六棱柱、堆积棒状三种形貌的WO3纳米膜。添加（NH4）2C2O4作为导向剂可以制备出片状、针状（长花）、绒球形貌的WO3纳米膜。而添加（K2C2O4/K2SO4）结构导向剂则能制备出雪花状、堆积块状、以及麦穗状的WO3纳米膜材料。76691

其中添加（NH4）2C2O4导向剂，在上Zn片上生长出的针状（长花）形貌的WO3具有最好的光催化性能，酸性大红GR的降解率高达98%。添加（K2C2O4/K2SO4）雪花状（导电玻璃）WO3纳米膜对酸性大红GR的降解率却只有14。6%。而堆积棒状（钨基）、片状（导电玻璃）、绒球状（钨基）形貌的WO3纳米膜对酸性大红GR的降解率为零，未表现出光催化性能。此外，针状、六棱柱、雪花状、麦穗状、堆积块状形貌的WO3都具有良好的光催化性能。

In recent years，The application of photocatalytic technology is constantly expanding, especially in the field of environmental pollution control。 WO3 is one of the photocatalytic materials，it is a conspicuous material，because of its excellent performance。 In this paper, we have discussed the preparation of different forms of WO3 photocatalyst by hydrothermal method。 After 450 degrees high temperature calcination。 The degradation of acid red GR in 400W under mercury lamp within 1。5 hours。 The degradation rate of WO3 photocatalyst with different morphologies was compared, and the performances of WO3 photocatalyst on conductive glass, Zn film, tungsten substrate and substrate were discussed。 The experimental results show that the WO3 nano films with three morphologies of needle like, six prism and stacked bar are prepared without the addition of structure directing agent。 Add (NH4) 2C2O4 as the guiding agent can be prepared by flake, needle (flower), WO3 nano film pompon morphology。 Add (K2C2O4/K2SO4) structure directing agent to prepare snowflake, massive accumulation, and ear like WO3 nano film materials。

Among them, the （NH4）2C2O4directing agent, the needle shaped (long) morphology of the Zn films grown on the WO3 has the best photocatalytic performance, acid red GR degradation rate of up to 98%。 Add (K2C2O4/K2SO4) snowflake (glass) WO3 nano film degradation of acid red GR rate was only 14。6%,and Stacking WO3 nanometre film morphology of nanorod flake (conductive glass), pompon like zero rate of degradation of acid red GR, did not show a photocatalytic performance。 In addition, needle, six prism, snowflake, and massive accumulation of wheat like morphology of WO3 has good photocatalytic performance。 

毕业论文关键词：WO3；光催化剂；水热合成；形貌

Keyword:  WO3；Photocatalyst；Hydrothermal method；Morphologies 

目    录

1 引言 4

1。1光催化剂研究现状 4

1。1。1国外研究现状 4

1。1。2我国研究现状 4

1。2光催化剂作用原理 4

1。3WO3的概述 5

1。3。1 WO3的基本性质 5

1。3。2 WO3的光学性质 5

1。3。3纳米WO3的优势