在传统光催化 CO2 反应中引入热能是提高转化效率的新方法.通过一锅法将含氧空位缺陷的 MoO3(MoO3-x)均匀负载在蜂窝状氮化碳(NCN)表面,成功制备出不同MoO3-x比例的MNCN复合催化剂.通过X射线粉末衍射、扫描电子显微镜、紫外可见漫反射光谱、傅立叶变换红外光谱等手段对复合材料进行表征;在全光谱照射下,复合样品 MNCN-1.0 光热催化 CO2 表现出优秀的性能,CO 和 CH4 的产率分别达到25.35 μmol/(g‧h)和1.80 μmol/(g‧h).这是由于MoO3-x独特的性质使其在全光谱反应中提高反应温度,促进温度场与光场的协同作用,提高了光催化的反应效率.
Preparation of MoO3-x Modified Honeycomb-Like Carbon Nitride and Its Photothermal Synergistic Catalytic CO2 Reduction Performance
Introducing thermal energy into traditional photocatalytic CO2 reactions is a novel method for enhancing conversion efficiency.This study successfully prepared oxygen vacancy defect MoO3(MoO3-x)modified honeycomb-like carbon nitride(MNCN)composite catalysts with various ratios by uniformly loading MoO3-x onto the surface of honeycomb-like carbon nitride(NCN)using a one-pot synthesis method.The composite materials were characterized by X-ray diffraction,scanning electron microscope,Ultraviolet-visible diffuse reflectance spectroscopy and Fourier transform infrared spectroscopy.Under full-spectrum illumination,the MNCN-1.0 composite exhibited an excellent performance,and yields of CO and CH4 reached 25.35 μmol/(g·h)and 1.80 μmol/(g·h)in the photothermal catalytic CO2 reaction.This is attributed to the unique properties of MoO3-x,which is able to enhance the reaction temperature in full-spectrum reactions,promoting the synergistic interaction between the temperature field and the light field and thereby improving the efficiency of photocatalysis.
photothermal catalysisCO2 reductionhoneycomb carbon nitridemolybdenum trioxide with oxygen vacanciescocatalyst
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