Visible light response photocatalyst and application thereof

Abstract

The invention provides high-activity photocatalysts absorbing UV rays and visible lights in the sunlight, as well as a method of decomposing harmful chemical matters and decomposing water to prepare hydrogen by these photocatalysts, which are compound oxide semiconductors formed of In and 5A element in periodic table of elements as well as transition metallic element M and expressed by the formula In1-xMxAO4 derived from displacing part of In in oxide semiconductor InAO4, where the sum of mole numbers of In and M is equal to mole number of A, and these compound oxide semiconductors acts as photocatalysts. It uses these photocatalysts to realize decomposition of harmful chemical matters and of water to prepare hydrogen under the irradiation with the sunlight containing UV rays and visible lights.

Description

1. Technical field:

[0001] The invention relates to photocatalysts responsive to ultraviolet and visible light and their applications, in particular to highly active photocatalysts composed of indium compound oxide semiconductors that can efficiently absorb ultraviolet and visible light in sunlight, and to use it to decompose harmful chemicals Matter and applications for making hydrogen. 2. Technical background

[0002] At present, due to the constraints of fossil resources and the profound environmental and energy problems caused by their massive consumption, such as global warming and environmental degradation, etc., which directly affect the survival of human beings and the improvement of quality of life, human beings urgently need to develop green, safe and of new energy. As a source of new energy, although nuclear power generation has been put into use, there have been problems in safety and waste disposal.

[0003] One of the ways to solve the problem is to use solar...