In Situ Growth Method For The Controllable Synthesis Of Cu/Ni-based Micronano-materials With High Performance

With the rapid development of modern economy and life,the shortage of energy and automobile exhaust,industrial waste water emissions and other environmental pollution problems have aroused widespread concern around the world.Therefore,many scientific researchers are committed to developing the new materials to solve the energy crisis and environmental problems.The synthesis of new materials with excellent performance plays a vital role in solving the two major crises.The performance of energy materials is ultimately determined by the structure and composition of materials.Nevertheless,how to design new materials with special structure and opitmal composition has become a major problem that researchers need to consider deeply.Cu/Ni-based compounds are one of the most important semiconductor materials.They are widely used in catalytic performance and electrochemical property.Thus,they possess a good prospect in the field of energy storage and conversion,and environmental protection.In this paper,we will design a facial and effective synthesize method to construct new materials with special structure and controllable composition,and then achieve the best performance of materials.They maybe contribute to solving energy and environmental problems,and providing a new idea for synthesizing effectively other materials with high performance.Firstly,continuous reaction constructs CuS nanosheets with 3D hierarchical structure and its application in dye degradation.In order to achieve the transformation of CuS nanosheets from two-dimensional to three-dimensional hierarchical structure,this work used sacrifice copper foam template method via the simple in situ continuous reaction effectively controlled the crystal growth direction of CuS nanosheets.The CuS with 3D hierarchical branch-like structure exhibits excellent catalytic performance when degrade the organic dye methylene blue（MB）in the dark box.Moreover,the ion exchange occurred between Cu@CuS with 3D hierarchical branch-like structure and Cu（NO₃）₂·6H2O,and then the CuS@Cu₉S₅ was synthesized.Ion exchange shows that the Cu@CuS with 3D hierarchical branch-like structure can absorb the Cu2+ produced during the printing process.This experiment confirms that the structure of the material will make a great impact on the performance,and provide a new idea for controlling the crystal growth direction of the material.Secondly,synthesize of Ni_1-xCo_xMoO₄ electrode material by ion exchange method for high performance asymmetric supercapacitor.3D hierarchical structure NiMoO4 microspheres composed of nanosheets were prepared by hydrothermal reaction with nickel foam as template.The multiple metal compounds are designed and synthesized via cobalt ions exchange method using NiMoO4 microspheres as precursor.These replaced products are used as supercapacitor electrode materials and assembled into asymmetric supercapacitor devices.The electrochemical properties of the materials were controlled by changing the components of products during the ion exchange.A series of characterizations are taken out for the as-synthesized materials.During the electrochemical test,the area of CV curve indicates that the replaced product has a high theoretical specific capacity.As-prepared Ni-Co molybdate not only exhibit a high device performance,they also perform excellent cycle stability due to the capacitance retention rate of the device is still high after 10000 cycles.This experimental results show that the synergistic effect of bimetallic ions can make a significance influence on the performance of supercapacitor.The introduction of Co ions can substantially improve the specific capacity and stability of NiMoO4 precursor.The ion exchange method fully proves that the composition of the material has a significant impact on the performance of the materials.