采用液相剥离技术制备了石墨相氮化碳纳米片(g-C₃N₄),将2种n型金属氧化物(NMOs)、纳米氧化物(TiO₂和SnO₂)通过自组装法分别负载到g-C₃N₄纳米片上制备NMOs/CN复合材料,并对其光催化活化过一硫酸盐(PMS)高效降解有机物的性能进行研究。结果表明,在PMS-TCN(10 h)体系中,可见光下污染物在30 min内降解率可达到91.69%,降解速率常数是块状g-C₃N₄的11.69倍。液相剥离法后二次自组装得到的NMOs/CN与PMS活化协同构成类芬顿体系,促进了其在高级氧化处理污染废水的潜在应用价值。

Graphitic phase carbon nitride(g-C₃N₄) nanosheets are prepared through liquid phase exfoliation technique,and NMOs/CN composites are obtained through loading two n-type metal oxides (NMOs) and nano oxides (TiO₂ and SnO₂),respectively onto g-C₃N₄ nanosheets by self-assembly method.The composites' photocatalytic performance in efficient degradation of organic matters by activated peroxymonosulfate is investigated.It is shown from study results that in PMS-TCN(10 h) system,the degradation rate of pollutants under visible light can reach 91.69% within 30 min,and the degradation rate constant is 11.69 times that by bulk g-C₃N₄.NMOs/CN obtained by secondary self-assembly after liquid phase stripping method synergizes with PMS activation to form a Fenton-like system,promoting its potential application in advanced oxidation treatment of polluted wastewater.

陈斐轲(1998-),女,硕士研究生,研究方向为纳米功能材料,1048379868@qq.com