硫酸根改性g-C_3N_4的制备及其催化性能

Synthesis and Photocatalytic Performance of Sulfate Modified Graphitic Carbon Nitride

采用酸水热后处理法制备了具有优异光催化合成双氧水性能的硫酸根改性石墨相氮化碳纳米棒催化剂。采用XRD、N_2吸附脱附、UV-Vis、FTIR、SEM、XPS、TPD、EIS及荧光光谱对催化剂进行表征。结果显示:硫酸根的引入改变了催化剂的结构性质、光学性质和氧气吸附能力。以高压钠灯为光源,乙二胺四乙酸为空穴捕获剂,所制备的硫酸根改性氮化碳催化剂的双氧水平衡浓度为2.7 mmol/L,是纯氮化碳的2.7倍。所制备的硫酸根改性氮化碳催化剂的双氧水平衡浓度为2.7 mmol/L,是纯氮化碳的2.7倍。

Sulfate modified graphitic carbon nitride nanorods as an efficient photocatalyst for the production of hydrogen peroxide was prepared via acid-hydrothermal method.XRD,N2 adsorption,UV-Vis,FTIR,SEM,XPS,TPD,EIS and PL were used to characterize the obtained catalysts.The results showed that sulfate modification not only influenced the morphology,structure property and optical property of catalyst,but also promoted its O2 adsorption ability.The equilibrium concentration of hydrogen peroxide over the as-prepared sulfate modified graphitic carbon nitride catalyst was 2.7 mmol/L,higher 2.7 times than that over neat graphitic carbon nitride,using high-pressure sodium lamp as light source and ethylenediaminetetraacetic acid as hole scavenger.