首页> 外文期刊>Advanced Sustainable Systems >C3N4/PDA S‐Scheme Heterojunction with Enhanced Photocatalytic H2O2 Production Performance and Its Mechanism
【24h】

C3N4/PDA S‐Scheme Heterojunction with Enhanced Photocatalytic H2O2 Production Performance and Its Mechanism

机译:增强光催化H2O2生产性能的C3N4/PDA S型异质结及其机理

获取原文
获取原文并翻译 | 示例
           

摘要

Abstract Developing a high‐performance photocatalyst is important for realizing efficient photocatalytic H2O2 generation. Herein, a novel step‐scheme (S‐scheme) heterojunction photocatalyst C3N4/PDA (CNP) comprised of ultrathin g‐C3N4 (U‐CN) and polydopamine (PDA) is constructed by in situ self‐polymerization. The optimal photocatalyst presents an excellent H2O2 production rate of 3801.25 µmol g−1 h−1 under light irradiation, which is about 2 and 11 times higher than that of pure U‐CN and PDA, respectively, and exceeds most of the reported C3N4‐based photocatalysts. The improvement of photocatalytic activity is ascribed to the synergistic effect of improved light absorption and promoted charge separation and transfer induced by the S‐scheme heterojunction. In situ irradiated X‐ray photoelectron spectroscopy (ISI‐XPS) reveals that the charge transfer route matches the S‐scheme mechanism. Rotating disk electrode (RDE) measurements and electron spin resonance (ESR) spectroscopy verify that H2O2 is produced by a two‐step one‐electron process. This work highlights a promising method to construct high‐performance S‐scheme heterojunction photocatalysts through the hybridization of PDA and C3N4.
机译:摘要开发一个高的性能光催化剂是重要的实现高效光催化过氧化氢生成。一个小说一步计划(方案)应承担的异质结光催化剂C3N4 / PDA (CNP)组成的超薄g C3N4应承担(U必经CN)和polydopamine (PDA)由原位自我聚合。最优光催化剂提供了一个优秀的过氧化氢产量的3801.25µ摩尔克−1 h−1下光辐照,2和11倍高于纯U的CN和PDA、分别超过了大多数的报道C3N4量为基础的催化剂。光催化活性是归因于协同效应的提高光吸收促进电荷分离和转移诱导异质结,S的方案。辐射X射线光电子能谱ISI (XPS)应承担的揭示了电荷转移的路线匹配的年代计划机制。测量电极(RDE)和电子自旋共振(ESR)谱证实过氧化氢由一个两第一步电子的过程。工作了一个有前途的方法来构造高绩效年代计划异质结论文通过PDA的杂交

著录项

相似文献

  • 外文文献
  • 中文文献
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号