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首页> 外文期刊>ACS applied materials & interfaces >In Situ Photodeposited Construction of Pt-CdS/g-C3N4-MnOx Composite Photocatalyst for Efficient Visible-Light-Driven Overall Water Splitting
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In Situ Photodeposited Construction of Pt-CdS/g-C3N4-MnOx Composite Photocatalyst for Efficient Visible-Light-Driven Overall Water Splitting

机译：原位光素施工的PT-CDS / G-C3N4-MNOX复合光催化剂的高效可见光驱动的整个水分裂

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摘要

For converting the renewable solar energy to hydrogen (H-2) energy by photocatalytic (PC) overall water splitting (OWS), visible-light-driven photocatalysts are especially desired. Herein, a model CdS/g-C3N4 photocatalyst with a type II heterojunction is first demonstrated via a facile coupling of g-C3N4 nanosheets and CdS nanorods. After being combined with in situ photodeposited 3 wt % Pt and 4 wt % MnOX dual cocatalysts simultaneously, the optimal visible-light-driven (lambda > 400 nm) composite photocatalyst of Pt-CdS/g-C3N4-MnOx gives a H-2 generation rate of 9.244 mu mol h(-1) (924.4 mu mol g(-1)) and a O-2 evolution rate of 4.6 mu mol h(-1) (460 mu mol g(-1)) in pure water, which is over 420 times higher than that of pure CdS nanorods loaded with 0.5 wt % Pt. The apparent quantum efficiency (AQE) reaches about 3.389% (at 400 nm) and 1.745% (at 420 nm), respectively. The combination of a type II heterojunction and simultaneous in situ photodeposition of the dual cocatalysts results in a dramatically improved PC efficiency and a long-term stability of the CdS/g-C3N4 visible-light-driven photocatalyst for OWS.
机译：为了通过光催化（PC）总水分离（OWS）将可再生太阳能转换为氢气（H-2）能量，特别是可见光驱动的光催化剂。这里，首先通过G-C3N4纳米液相色谱和CDS纳米棒的容纳耦合来说明具有II型异质结的模型CDS / G-C3N4光催化剂。同时与原位光素3wt％Pt和4wt％Mnox双助催化剂相结合后，PT-CDS / G-C3N4-MNOX的最佳可见光驱动（Lambda> 400nm）复合光催化剂给予H-2生成率为9.244 mmol h（-1）（924.4 mm mol g（-1））和4.6μmolh（-1）的O-2演化速率（-1）（460μmmolg（-1））中的纯水，比0.5wt％pt的纯CDS纳米棒高出420倍以上。表观量子效率（AQE）分别达到约3.389％（400nm）和1.745％（420nm）。 II型异质结的组合和双助催化剂的同时光致沉积，导致用于OWS的CDS / G-C3N4可见光催化剂的显着提高的PC效率和长期稳定性。

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  • 来源
    《ACS applied materials & interfaces》 |2020年第18期|共10页
  • 作者

    Zhou Xunfu; Fang Yuxuan; Cai Xin; Zhang Shengsen; Yang Siyuan; Wang Hongqiang; Zhong Xinhua; Fang Yueping;

  • 作者单位

    South China Agr Univ Coll Mat &

    Energy Key Lab Biobased Mat &

    Energy Minist Educ Guangzhou 510642 Peoples R China;

    South China Agr Univ Coll Mat &

    Energy Key Lab Biobased Mat &

    Energy Minist Educ Guangzhou 510642 Peoples R China;

    South China Agr Univ Coll Mat &

    Energy Key Lab Biobased Mat &

    Energy Minist Educ Guangzhou 510642 Peoples R China;

    South China Agr Univ Coll Mat &

    Energy Key Lab Biobased Mat &

    Energy Minist Educ Guangzhou 510642 Peoples R China;

    South China Agr Univ Coll Mat &

    Energy Key Lab Biobased Mat &

    Energy Minist Educ Guangzhou 510642 Peoples R China;

    Guangxi Normal Univ Sch Chem &

    Pharmaceut Sci Guangxi Key Lab Low Carbon Energy Mat Guilin 541004 Peoples R China;

    South China Agr Univ Coll Mat &

    Energy Key Lab Biobased Mat &

    Energy Minist Educ Guangzhou 510642 Peoples R China;

    South China Agr Univ Coll Mat &

    Energy Key Lab Biobased Mat &

    Energy Minist Educ Guangzhou 510642 Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学工业;
  • 关键词

    cadmium sulfide; carbon nitride; heterojunction; overall water splitting photodeposition;

    机译：硫化镉;碳氮化物;异质结;整体水分解光素;

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