Spatial charge separation of one-dimensional Ni2P-Cd0.9Zn0.1S/g-C3N4 heterostructure for high-quantum-yield photocatalytic hydrogen production
Spatial charge separation of one-dimensional Ni2P-Cd0.9Zn0.1S/g-C3N4 heterostructure for high-quantum-yield photocatalytic hydrogen production
复制标题
一维Ni2P-Cd0.9Zn0.1S/g-C3N4异质结构的空间电荷分离用于高量子产率光催化制氢
DOI：
10.1016/j.apcatb.2017.06.018
复制
发表时间：
2017-11
影响因子：
22.1
通讯作者：
Guo Liejin
中科院分区：
文献类型：
--
作者：
Qin Zhixiao;Xue Fei;Chen Yubin;Shen Shaohua;Guo Liejin
构建异质结构光催化剂以促进空间电荷分离被认为是提高光催化制氢的核心。本文报道了Ni_2 P-Cd_（0. 9）Zn_（0. 1）S/石墨碳氮化物（g-C_3 N_4）异质结的合成及其可见光催化制氢性能。结果表明，三元光催化剂具有一维形貌。在Cd 0. 9 Zn 0. 1 S纳米棒的表面，Ni 2 P纳米颗粒和一层g-C3 N4紧密沉积。Ni 2 P-Cd 0. 9 Zn 0. 1 S/g-C3 N4催化剂的最佳放氢速率为2100 μmol h− 1 mg −1，对应于420 nm处的表观量子产率高达73.2%。同时，g-C3 N4膜能有效地收集Cd 0. 9 Zn 0. 1 S中的光生空穴，有效地抑制了金属硫化物的光腐蚀，并具有良好的90 h稳定性。通过光致发光、表面光电压和电化学测试对催化剂的作用机理进行了详细的分析，结果表明，Ni 2 P助催化剂的光催化活性显著提高是由于光生载流子的高效空间分离以及表面反应的加速。本工作为获得高量子产率、稳定的非贵金属异质结构光催化体系提供了一条有效途径。
Constructing heterostructured photocatalysts to facilitate spatial charge separation is deemed to be central to improving photocatalytic hydrogen production. Herein, we reported the synthesis of Ni2P-Cd0.9Zn0.1S/graphitic carbon nitride (g-C3N4) heterostructure for photocatalytic hydrogen production under visible-light irradiation. It was revealed that the ternary photocatalysts exhibited a one-dimensional morphology. Ni2P nanoparticles and a layer of g-C3N4were tightly deposited on the surface of Cd0.9Zn0.1S nanorods. The optimal hydrogen evolution rate over Ni2P-Cd0.9Zn0.1S/g-C3N4was ∼2100 μmol h−1mg−1, corresponding to an apparent quantum yield as high as 73.2% at 420 nm. Meanwhile, the g-C3N4layer could effectively collect the photo-induced holes from Cd0.9Zn0.1S, which substantially alleviated the photocorrosion of metal sulfide and led to an excellent stability for 90 h. A detail analysis of the action mechanism by photoluminescence, surface photovoltage, and electrochemical measurements revealed that the dramatically improved photocatalytic activity should be ascribed to highly efficient spatial separation of photo-induced charge carriers, as well as accelerated surface reaction by Ni2P cocatalysts. It is believed that the present work supplies an effective way to obtain non-precious heterostructured photocatalytic system for high-quantum-yield and stable hydrogen production.
登录
查看更多内容
影响因子：
12.9
作者：
T. P. A. Ruberu;Yuming Dong;A. Das;R. Eisenberg
通讯作者：
T. P. A. Ruberu;Yuming Dong;A. Das;R. Eisenberg
一步水热合成(CuIn)(0.2)Zn1.6S2空心亚微球用于高效可见光驱动光催化制氢
影响因子：
7.2
作者：
Chen Yubin;Qin Zhixiao;Guo Xu;Wang Xixi;Guo Liejin
通讯作者：
Guo Liejin
DOI：
10.1002/chin.200538027
发表时间：
2005-05
期刊：
ChemInform
影响因子：
--
作者：
Defa Wang;Zhigang Zou;Jinhua Ye
通讯作者：
Defa Wang;Zhigang Zou;Jinhua Ye
影响因子：
3.9
作者：
Bai, Xiaojuan;Wang, Li;Zhu, Yongfa
通讯作者：
Zhu, Yongfa
影响因子：
17.1
作者：
Chang, Kun;Mei, Zongwei;Ye, Jinhua
通讯作者：
Ye, Jinhua