The effectiveness of g-C3N4 (gCN) in this process is hindered by several factors, including rapid exciton recombination, limited solar light absorption, and a lack of active sites for conducting the reduction. To address these challenges, various amendment techniques have been executed, such as ...
In this review, we summarize various methods to improve g-C3N4’s light absorption and photo-induced charge transfer, including vacancy engineering, morphology control, heteroatom doping, and forming heterostructure. The applications of g-C3N4 and its derivatives in photodegradation of organic pollutants...
g-C3N4 的结构缺陷,从而不利于电子传递和光电流.Guohui Dong 等 〔18〕 研究了多孔结构对g-C3N4 光反应活 性的影响,结果表明多孔结构使光电流和光还原CO2 活性减小,使光氧化降解有机物活性提高.在前期的 基础研究中,发现了不同分子前驱体热解制备的g-C3N4具有不同的比表面积 〔19〕 ,由尿素热解生成的多孔 ...
光催化氧化去除 NO 结果表明,12.5%- ZIF-8/g-C3N4 的 NO 氧化去除效率最佳,且不生成有毒中间产物 NO2,具有最优异的光催化活性,对于 NO 的氧化去除率可 达 55.1%.机理研究表明,基于 g-C3N4 的异质结构不仅抑制了光生载流子的复合,而且由于 g-C3N4 与 ZIF-8 之间的协同作 用,促进了可见光的吸收以及反应...
C3N4的量为30mg,溶剂水和乙醇胺比例为1:1,反应时间为14h时,所得g- C3N4/CoNi2S4的比电容最大;然后在这一条件下,分别制备了g-C3N4/FeCo2S4、 g-C3N4/ZnCo2S4、g-C3N4/CuCo2S4和g-C3N4/CoMn2S4复合材料。通过GCD测试 其电容性能发现,g-C3N4/CoNi2S4比电容最大,在1A/g时,比电容高达2058F/g, 是g-C...
Figure 2. FT-IR spectra of the g-C3N4 photocatalysts. 3.4. Optical Characteristics The measured diffuse reflectance spectra of the g-C3N4 photocatalysts are shown in the inset of Figure 3. They were used for the construction of the absorption functions (F × E)1/2 = f(E) presented in Fi...
The g-C3N4/Bi2WO6 composite photocatalyst has emerged as a promising candidate for enhancing photocatalytic CO2 reduction [32,33]. By combining g-C3N4 and Bi2WO6, the composite benefits from the visible-light absorption capabilities of both materials, while the formation of a heterojunction ...
The enhanced photocatalytic performance of In2S3/g-C3N4 heterojunctions could be attributed to its wide absorption in the visible region and efficient electron-hole separation. On the basis of radical scavenger experiments, superoxide radicals and holes are suggested to play a critical role in RhB ...
本文对g-C3N4基S型异质结研究背景、概念提出、基本理论、设计制备、表征方法等方面的最新研究进展进行了较全面的综述. 此外, 通过实例讨论和列表比较详细讨论了g-C3N4基S型异质结的各种应用, 包括光催化制H2、还原CO2、降解污染物、生产H2O2. 最后, 总结了g-C3N4基S型异质结当前的研究进展和不足, 并对未来的研...
owing to sp2-hybridized C and N having π-conjugated electronic systems. Compared to TiO2, g-C3N4band gap is considerably small i.e., 2.7–2.8 eV, responsible for absorption in 450–460 nm ranges of visible spectrum32. Unfortunately pristine g-C3N4suffers from some limitations which hinder...