Preparation Of TiO₂ Composite Fiber Doped With Graphene Quantum Dots And Its Application In Photocatalysis

With the rapid economic development and the improvement of people’s living standards,environmental pollution and energy issues have become the most important issues for the continued development of human society.The sun will deliver a lot of energy to the earth every year,and solar energy has the characteristics of green,clean and sustainable.The huge solar energy source just provides a solution to the problem of increasing energy consumption and environmental tenderness in today’s society.Making Full use of solar energy can effectively solve the problems of energy crisis and environmental pollution caused by the current fossil energy.The discovery of photocatalytic degradation of water to produce hydrogen in 1972 attracted the attention of researchers.Since then,more and more researchers have devoted to the research of photocatalysis technology.This paper briefly introduces photocatalysis technology and its application fields,and classifies photocatalysts in detail.By reviewing the development of photocatalysis technology in recent years,the common preparation methods and modification methods of photocatalyst are introduced.On this basis,a catalyst with high photocatalytic efficiency in visible light was prepared by Electrospinning and hydrothermal method.This photocatalyst is based on PVDF and PVP fiber membranes,and traditional titanium dioxide（Ti O₂）photocatalysts and graphene quantum dots（GQDs）are attached to it.In this way,successfully extending the spectral response range of the photocatalyst to the visible light region,suppressing the recombination of electron holes,and expanding the specific surface area,thereby improving the photocatalytic efficiency.