针对热聚合法制得g-C3N4比表面积低、团聚严重、光催化活性低、粉状难分离回收的瓶颈，结合木素基泡沫炭的绿色性及前期研究基础，项目拟在热剥离g-C3N4纳米片上，采用原位生长法制备表面分散型Gd-N-TiO2/g-C3N4，将其负载于大尺寸竹基聚氨酯泡沫炭BFC上，制备易回收的新型高效可见光催化剂Gd-N-TiO2/g-C3N4/BFC。研究内容包括：1）考察热剥离时间、温度对g-C3N4纳米片结构及表面状态的影响规律，探讨纳米片的形成过程及机理；2）考察Gd、N掺杂量、Gd-N-TiO2的加入量对Gd-N-TiO2/g-C3N4晶相、能带、光量子产率的影响规律以及相关机理；3）分别以罗丹明B和亚甲基蓝为模拟污染物，考察Gd-N-TiO2/g-C3N4负载量、BFC孔结构、吸附性能、几何形态等对材料透光度、光催化性能及循环利用的影响。项目的展开将为高活性可见光催化剂的研究提供新的思路。

Synthesized via thermal polymerization method, g-C3N4 has a low specific surface area, low photocatalytic activity, and difficult to separate and recover. Aiming at the abovementioned defects of g-C3N4, combining the environmentally friendly of lignin-based foam carbon and the basis of previous researches, the project intends to fabricate surface-dispersed Gd-N-TiO2/g-C3N4 on ultrathin g-C3N4 nanosheet via in-situ growth. Synthesize a new high-efficiency visible light catalyst by loading Gd-N-TiO2/g-C3N4 on large-size bamboo-based polyurethane foam carbon (BFC). The research contents include: 1) Investigate the influence of thermal stripping time and temperature on the specific stucture and surface state of g-C3N4 nanosheets, and discussing the formation process and mechanism of nanosheets; 2) Investigate the influence of Gd, N doping amount, the amount of Gd-N-TiO2 on the crystal phase, energy band and photon yield of Gd-N-TiO2/g-C3N4 and study the related mechanisms; 3) Selecting Rhodamine B and methylene blue as simulated pollutants, respectively, explore the effects of Gd-N-TiO2/g-C3N4 loading amount, BFC pore structure, adsorption performance and geometry factors on material transmittance, photocatalytic and recycling performances of Gd-N-TiO2/g-C3N4/BFC. The implementation of the project will provide new ideas for the study of high-activity visible light catalysts.