Design And Photocatalytic Properties Of Two Dimensional Layered Composites Materials Based On Carbon Nitride And Bismuth Oxychloride

With development of industrial technologies,the environment pollution and energy crisis have become the two major issues to the human beings.Photocatalytic technology is a tendency in environmental management and sewage treatment has important application prospect of green technology,in the energy and environmental protection has the huge development potential,has received the widespread attention in recent years.Sunlight is by far the most abundant renewable energy source,providing energy to meet all human needs hundreds of times.Photocatalytic technology has been applied to environmental treatment and wastewater treatment in recent years.But the conventional semiconductor photocatalyst,(such as TiO2 and ZnO,etc.)are widespread photocatalytic quantum efficiency is low,easy to inactivation and solar energy use efficiency far short of the requirements of industrialization and so on shortcomings,these seriously hindered the semiconductor photocatalytic technology application.Therefore,the development of new high-efficient semiconductor photocatalyst has become a hot spot in the field of photocatalysis.Two-dimensional layered material with its unique structure began to be widely used light catalysis research,first of all,the layered materials with the size of the area,especially single,second conspicuous electrical properties,third,the large lateral size.Still keep the atom thick,giving them extra energy and specific surface area.This paper mainly studies the photocatalytic performance of two-dimensional layered materials,and the specific research work is as follows:(1)We through a simple step oxidative polymerization of hydrothermal method,was a kind of polyaniline-sensitized bismuth oxychloride core/shell nanosheets structure,and then under the drive of visible light,greatly improved the bismuth oxychloride photocatalytic degradation of rhodamine B(RhB)activity and stability.This unique core/shell nano structures,made full use of bismuth oxychloride nano structure characteristics,promote to electronic light-hole for effective separation,but also for RhB degradation under visible light provides a very active site.The catalytic activity of bismuth/polyaniline(PB-1)photocatalyst optimized in the experiment was nearly 3.0 times higher than that of BiOCl,and the photocatalytic stability was enhanced.Our experimental results show that under the visible light,the thickness of about 1-2 nm slim the existence of polyaniline thin shell can not only provide new possibilities for efficient photocatalyst,and to improve the high stability of the photocatalyst provides a new strategy.(2)Noble metals are often used as catalysts to catalyze the production of hydrogen,and a high-performance photocatalytic system powered by visible light remains a major challenge.In this paper,we designed a face-to-face palladium nanosheet/amorphous carbon nitride,showing its high photocatalytic hydrogen production.In the experiment,we measured the face-to-face structure of palladium nanosheets/amorphous carbon nitride hydrogen generation rate to an average of 1.45 g tendency for h-1,is almost 2.6 times of particle-to-face structure of the palladium nanoparticles/amorphous carbon nitride.Our preparation between the metal cocatalyst and metal-free-photocatalyst constitute a kind of face-to-face structure,make full use of the layered materials unique electronic structure and high specific surface area,the face-to-face structure of the special performance of photocatalytic hydrogen production system will continue to be the study found that or optimize great addition to the new photocatalyst.