以偏钒酸铵和尿素混合物为前驱体,混合煅烧制备了V2O5/g-C3N4复合物催化剂.用X射线衍射(XRD)、傅里叶红外光谱(FT-IR)、扫描电镜(SEM)、透射电镜(TEM)、紫外-可见光漫反射吸收光谱(UV-vis)、比表面积测试(BET)、光致发光谱(PL)等对其结构进行了表征.结果表明复合物中存在V2O5和g-C3N4形成异质结构,其禁带宽度减小、吸收带边红移,光催化效率有显著提高.以亚甲基蓝(MB)为目标化合物,评价了样品的光催化活性,当前躯体中尿素与NH4VO3质量比为10∶1,煅烧温度为500℃,煅烧时间为0.5h,催化剂活性最高.在60W日光灯照射40 min,对亚甲基蓝得降解率达到97.52％.
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