Design And Synthesis Of Photoelectric Functional Materials And Their Performance In Scintillation Radiation Detection And Overall Water Splitting

With the development of the national economy and the increasing improvement of people’s living standards,people’s requirements for the quality of life level will be improved,such as information and communication,convenient transportation,so a large number of radio frequency equipment,electronic communication came into being,and energy consumption is increasing day by day.However,it is recognized that the electromagnetic radiation pollution caused by artificial electromagnetic technology and the carbon pollution caused by traditional energy consumption seriously harm people’s physical and mental health,which is a"stone"on the road of sustainable development.Therefore,this paper based on the above problems,mainly carried out two aspects of work exploration.Electromagnetic radiation pollution has been recognized as the"fourth major public hazard",has caused the extensive attention of the country and society.To reduce the harm of radiation pollution,on the one hand,is to strictly implement the national standards,in the scope of non-destructive use of electromagnetic technology;Secondly,effective radiation detection is an effective means to prevent radiation injury.X-rays are widely used in medical imaging,non-destructive safety inspection,crystallography and other fields.Therefore,it is very important to develop highly responsive and stable X-ray radiation detection materials.The main work of this paper is to synthesize metal-organic framework compound[Pb（adda）（DMF）]1 with strong X-ray response by one-step hydrothermal method using large conjugated luminescent motif and heavy metal lead with large X-ray absorption cross section.The compound gives full play to the synergistic effect between organic components and inorganic units,and achieves green light emission visible to the naked eye under X-ray irradiation.Compared with commercial scintillation crystal lead tungstate and anthracene,it has higher X-ray response sensitivity.In addition,its performance is basically stable under151Gy large dose radiation and 97%relative humidity treatment.In addition,we mixed compound 1 with polymer matrix to prepare polymer composite film for X-ray imaging,imaging images showed a spatial resolution of 5.0 lp/mm.This work demonstrates the possibility of scintillation metal-organic framework for X-ray imaging applications.Energy is the basis for human survival and development.The limited reserves of fossil energy and the environmental pollution caused by fossil fuel combustion make it urgent to develop ideal new energy.Hydrogen energy has attracted extensive research interest because of its high calorific value and zero pollution of its products.Electrocatalytic decomposition of water is an efficient and widely used research method.The catalytic process mainly uses efficient precious metal catalysts to reduce the reaction energy barrier.However,precious metal catalysts have problems such as high price and poor cycle stability,which limit their wide application.Therefore,the development of affordable,efficient and stable bifunctional catalysts is the key problem to be solved urgently.In this work,the influence of doping on materials is explored based on the main idea of doping regulation of material performance potential.The（P,W）-Mo O₂/NF catalyst was successfully synthesized in situ using porous conductive three-dimensional nickel foam as supporting substrate through two processes,namely,one-step hydrothermal process and phosphating calcination process.The results showed that the catalytic performance of the double-doped（P,W）-Mo O₂/NF catalyst was significantly improved at 1.0 M KOH,and the overpotential of OER was 308 m V@40 m A cm^-2,and the overpotential of HER was 89 m V@10 m A cm^-2.It can provide a current density of 30 m A cm^-2 with a cell voltage of 1.65 V when used as a double-electrode material for total hydrolysis reaction.Moreover,its performance remained stable for up to 20 hours of continuous reaction.The doping changes the morphology of the material,adjusts the electronic environment inside the material,promotes the electron synergistic effect and electron transfer,and thus enhances the catalytic activity.This work provides an effective idea for the construction of a bifunctional electrolytic water catalyst with excellent performance and low cost.