Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
In situ constructed oxygen-vacancy-rich MoO3−x/porous g-C3N4 heterojunction for synergistically enhanced photocatalytic H2 evolution
RSC Advances ( IF 3.9 ) Pub Date : 2021-09-22 , DOI: 10.1039/d1ra05620d Yufeng Pan 1 , Bin Xiong 1 , Zha Li 2 , Yan Wu 1 , Chunjie Yan 1 , Huaibin Song 1
RSC Advances ( IF 3.9 ) Pub Date : 2021-09-22 , DOI: 10.1039/d1ra05620d Yufeng Pan 1 , Bin Xiong 1 , Zha Li 2 , Yan Wu 1 , Chunjie Yan 1 , Huaibin Song 1
Affiliation
|
A simple method was developed for enhanced synergistic photocatalytic hydrogen evolution by in situ constructing of oxygen-vacancy-rich MoO3−x/porous g-C3N4 heterojunctions. Introduction of a MoO3−x precursor (Mo(OH)6) solution into g-C3N4 nanosheets helped to form a porous structure, and nano-sized oxygen-vacancy-rich MoO3−x in situ grew and formed a heterojunction with g-C3N4, favorable for charge separation and photocatalytic hydrogen evolution (HER). Optimizing the content of the MoO3−x precursor in the composite leads to a maximum photocatalytic H2 evolution rate of 4694.3 μmol g−1 h−1, which is approximately 4 times higher of that of pure g-C3N4 (1220.1 μmol g−1 h−1). The presence of oxygen vacancies (OVs) could give rise to electron-rich metal sites. High porosity induced more active sites on the pores' edges. Both synergistically enhanced the photocatalytic HER performance. Our study not only presented a facile method to form nano-sized heterojunctions, but also to introduce more active sites by high porosity and efficient charge separation from OVs.
中文翻译：
原位构建富氧空位MoO3−x/多孔g-C3N4异质结用于协同增强光催化析氢
开发了一种简单的方法，通过原位构建富氧空位的MoO 3− x /多孔gC 3 N 4异质结来增强协同光催化析氢。将MoO 3− x前驱体（Mo(OH) 6 ）溶液引入gC 3 N 4纳米片中有助于形成多孔结构，纳米尺寸的富氧空位MoO 3− x原位生长并形成异质结gC 3 N 4 ，有利于电荷分离和光催化析氢（HER）。优化复合材料中MoO 3− x前驱体的含量导致最大光催化H 2析出速率为4694.3 μmol g -1 h -1 ，大约是纯gC 3 N 4的4倍（1220.1 μmol g -1小时-1 )。氧空位（OV）的存在可能会产生富电子金属位点。高孔隙率在孔隙边缘引起更多的活性位点。两者协同增强了光催化 HER 性能。 我们的研究不仅提出了一种形成纳米级异质结的简便方法，而且还通过高孔隙率和有效的 OV 电荷分离引入了更多的活性位点。
更新日期：2021-09-22
中文翻译：
原位构建富氧空位MoO3−x/多孔g-C3N4异质结用于协同增强光催化析氢
开发了一种简单的方法，通过原位构建富氧空位的MoO 3− x /多孔gC 3 N 4异质结来增强协同光催化析氢。将MoO 3− x前驱体（Mo(OH) 6 ）溶液引入gC 3 N 4纳米片中有助于形成多孔结构，纳米尺寸的富氧空位MoO 3− x原位生长并形成异质结gC 3 N 4 ，有利于电荷分离和光催化析氢（HER）。优化复合材料中MoO 3− x前驱体的含量导致最大光催化H 2析出速率为4694.3 μmol g -1 h -1 ，大约是纯gC 3 N 4的4倍（1220.1 μmol g -1小时-1 )。氧空位（OV）的存在可能会产生富电子金属位点。高孔隙率在孔隙边缘引起更多的活性位点。两者协同增强了光催化 HER 性能。 我们的研究不仅提出了一种形成纳米级异质结的简便方法，而且还通过高孔隙率和有效的 OV 电荷分离引入了更多的活性位点。
京公网安备 11010802027423号