Synthesis And Photocatalytic Hydrogen Evolution Of Ni/MIL-101?Cr?loaded Ni,Ni?OH?₂ Doped CdS

Energy crisis and environmental pollution are two major problems facing our society.Therefore,it is particularly important to find a new alternative energy.Hydrogen,a fuel that produces only water after combustion,is recognized as a green renewable energy source.At present,the main ways for preparing hydrogen in the world include hydrogen production by electrolysis of water,hydrogen production by chemical reaction,and hydrogen production by photocatalysis.Photocatalytic hydrogen production has been extensively studied in recent years due to the fact that the energy source of the reaction is an inexhaustible source of light in nature and it is not very demanding in the reaction process.At present,the mainstream photocatalysts are generally sulfide and oxide,and are modified by a series of means such as doping and loading,in order to obtain a material with good photocatalytic hydrogen production activity.This paper will mainly study the hydrogen production performance of CdS materials.Since the ordinary CdS material has a low specific surface area and is susceptible to photocorrosion under illumination conditions,its photocatalytic hydrogen production activity is low.Metal-organic frameworks(MOFs)are materials with large specific surface area,stable structure and adjustable porosity.They can be used as carriers for photocatalysts to provide more active sites for hydrogen production.After being modified by metal doping,CdS material can effectively avoid photocorrosion,and ensure its hydrogen production activity and improve its practical application value.Based on the previous research of our group,this paper will continue to load CdS materials doped with metal Ni on the basis of hydrothermal synthesis of MIL-101(Cr)with different doping amounts of Ni.By means of metal doping modification,the photocatalytic activity of the materials will be improved more significantly than the previous experiments of the research group.The hydrogen production activity of the best material reached 55.62 mmol/(gCdS·h),10.34 times of that of the pure CdS under the same experimental conditions.The doping amount of Ni synthesized by the above hydrothermal method different MIL-101(Cr)was loaded with pure CdS,and Ni(OH),is doped into it by dipping method,and its doping amount is investigated to produce hydrogen for the material.By doping Ni(OH)2.the hydrogen production activity of the material was improved to 22.20 mmol/(g-h).The CdS aerogels were prepared by sol-gel method.It was confirmed that different preparation methods have an effect on the hydrogen production activity of CdS aerogels.The specific surface area of the material with the best effect reached 205.48 m2/g,which was obviously higher than that of the commercial CdS material,and the hydrogen production activity of the material reached 4.79 mmol/(gCbS·h),which was also better than that of the commercial CdS material The effect of activity.And the hydrogen production activity of the material was studied by various characterization methods.