scholarly journals Carbon-Doping as Efficient Strategy for Improving Photocatalytic Activity of Polysilicon Supported Pd in Hydrogen Evolution from Formic Acid

Polymers ◽  
2021 ◽  
Vol 13 (22) ◽  
pp. 3919
Author(s):  
Amal Al-Azmi ◽  
Sajjad Keshipour

Interest in cost-effective materials pushes researchers to the inexpensive and abundant semiconductors to use photons’ energy for generating electrons and holes required for photocatalytic transformations. At the same time, polysilicon is one of the economic semiconductors with a disadvantage of high bandgap which could be solved by carbon-doping. We employed this strategy to the synthesis of carbon-doped polysilicon by a new approach starting from citric acid and methyltrimethoxysilane. The nanocomposite obtained was utterly characterized, and compared with bare polysilicon; increased UV–Vis absorbance and shift to higher wavelengths were the most notable characteristics of the synthesized catalyst. The carbon-doped polysilicon was modified with Pd nanoparticles to obtain a new heterogeneous photocatalyst for the formic acid degradation. The decomposition of formic acid was photocatalyzed by the obtained nanocomposite with a hydrogen production turnover frequency of up to 690 h−1. Moreover, it was demonstrated that the catalyst is stable and recyclable.

2016 ◽  
Vol 1 (9) ◽  
pp. 1879-1886 ◽  
Author(s):  
Miriam Navlani-García ◽  
Kohsuke Mori ◽  
Ai Nozaki ◽  
Yasutaka Kuwahara ◽  
Hiromi Yamashita

2008 ◽  
Vol 2008 (7) ◽  
pp. 12-15 ◽  
Author(s):  
Yu Zhu ◽  
Yongyin Kang ◽  
Zhiqing Zou ◽  
Qun Zhou ◽  
Junwei Zheng ◽  
...  

2008 ◽  
Vol 10 (5) ◽  
pp. 802-805 ◽  
Author(s):  
Yu Zhu ◽  
Yongyin Kang ◽  
Zhiqing Zou ◽  
Qun Zhou ◽  
Junwei Zheng ◽  
...  

2014 ◽  
Vol 07 (01) ◽  
pp. 1350068 ◽  
Author(s):  
Wubin Sui ◽  
Jingtang Zheng ◽  
Charles U. Pittman ◽  
Nasr Bensalah ◽  
Mingbo Wu ◽  
...  

This study aimed to develop an effective, environmentally benign composite catalyst composed of carbon materials and titanium dioxide ( TiO 2). Carbon-doped titanium dioxide ( C – TiO 2) was prepared by coating TiO 2 onto macro-mesoporous carbon (MMC). The structure, morphology and surface chemistry states of the C – TiO 2 were characterized by XRD, TEM, XPS, UV-vis and FTIR. The photocatalytic activity of C – TiO 2 was evaluated based on the decomposition of an aqueous methyl orange solution in visible light. C – TiO 2 significantly improved photocatalytic activity. A possible mechanism for the improvement of the photocatalytic activity of C – TiO 2 in visible light was proposed. The results of the analysis suggested that MMC played key roles as the support, absorbent, location of photo-generated electron transfer, and carbon-doping source during methyl orange photodegradation.


2015 ◽  
Vol 88 (10) ◽  
pp. 1500-1502 ◽  
Author(s):  
Miriam Navlani-García ◽  
Kohsuke Mori ◽  
Meicheng Wen ◽  
Yasutaka Kuwahara ◽  
Hiromi Yamashita

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