| 赵云霏,毋瑞仙,蒋平平,董玉明.g-C3N4和Ni2P的复合及其光催化产氢性能研究[J].分子催化,2018,32(2):142-151 |
| g-C3N4和Ni2P的复合及其光催化产氢性能研究 |
| Integration of g-C3N4 and Ni2P Together for Photocatalytic Hydrogen Evolution |
| 投稿时间：2017-12-23 修订日期：2018-01-21 |
| DOI： |
| 中文关键词: 类石墨烯碳氮化合物 磷化镍 复合光催化剂 析氢反应 |
| 英文关键词:graphitic carbon nitride nickel phosphide composite photocatalysts hydrogen evolution reaction |
| 基金项目:国家自然科学基金（21676123）和江苏省自然科学基金（BK20161127）资助项目. |
|
| 摘要点击次数: 1619 |
| 全文下载次数: 1641 |
| 中文摘要: |
| 采用一步煅烧法使类石墨烯碳氮化合物（g-C3N4）和磷化镍（Ni2P）复合并对其光催化产氢性能进行研究.利用X射线粉末衍射、透射电镜、X射线光电子能谱、紫外可见光谱对该复合催化剂的组成、形貌等进行了表征.研究了不同含量的Ni2P以及不同牺牲剂对g-C3N4/Ni2P光催化性能的影响.与单独的g-C3N4相比，该复合催化剂的光催化产氢速率提高了13倍，可以达到165 μmol g-1·h-1.利用光电化学和光致发光光谱等技术对该复合光催化剂的光催化产氢机理进行研究，结果表明Ni2P在高效分离光生载流子方面起了关键作用，并且g-C3N4和Ni2P的复合产生了协同效应加速了电子-空穴对的分离，提高了光催化产氢性能. |
| 英文摘要: |
| Graphitic carbon nitride (g-C3N4) and nickel phosphide (Ni2P) photocatalysts were integrated via a facile heating method for photocatalytic hydrogen evolution. The resulted photocatalysts were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, energy dispersive X-ray spectroscopy, ultraviolet-visible diffuse reflection spectroscopy and X-ray photoelectron spectroscopy. The photocatalytic hydrogen evolution was investigated for g-C3N4/Ni2P with different contents of Ni2P, also explored in different sacrificial agent aqueous solutions. Compared with the g-C3N4, the photocatalytic hydrogen production rate of the compo-site catalyst increased by 13 times, reaching 165 μmol g-1·h-1. The photoelectrochemical I-t curves and photoluminescence spectroscopy were tested to research the mechanism of hydrogen production. It suggested that Ni2P played a key role, which might lead to efficiently separation of the photo-generated charge carriers, and the combination of g-C3N4 and Ni2P produced a synergistic effect that accelerated the separation of electron-hole pairs, enhanced the photocatalytic H2 production activity. |
| HTML 查看全文 查看/发表评论 下载PDF阅读器 |
