中文摘要：

以尿素为原料,利用固相聚合方法制备层状g-C3N4新型半导体光催化材料,并运用XRD、FTIR、SEM和UV-VIS对产物的结构、组成、形貌和光吸收性能进行表征,确定所制备的氮化碳材料为具有可见光响应的类石墨相结构。考察g-C3N4光催化剂的使用量、反应体系p H值、反应时间等因素对造纸废水CODcr去除率的影响。实验结果表明,在可见光（λ〉400 nm）作用下,对于CODcr浓度为500 mg/L的造纸废水而言,g-C3N4光催化降解效果较好的工艺条件为：溶液的初始p H值为3.0、光催化剂的用量为1.0 g/L、反应时间6 h。在上述最优条件下,进行光催化,造纸废水的CODcr去除率为84.72%,经g-C3N4光催化降解处理后的造纸废水,能实现达标排放。

英文摘要：

Nanomaterial Graphite carbon nitride（ g-C3N4） was prepared in this paper using solid urea as raw materials through combustion reaction.The XRD,FTIR,SEM and UV-VIS were used to characterize the prepared carbon nitride,showing that this carbon nitride prepared has a graphite-like phase structure and visible response capability.In addition,this material was used to degrade the papermaking wastewater with 500 mg / L CODcr. The results showed that at the conditions of initial p H 3.0,photocatalyst concentration 1.0 g / L,and reaction time 6 h,84. 72% of CODcr of wastewater was removed from the wastewater,which showed that this carbon nitride is a promising photocatalytic material for treatment of papermaking wastewater.