Al-Azmi Amal, Keshipour Sajjad
Chemistry Department, Kuwait University, P.O. Box 5969, Safat 13060, Kuwait.
Department of Nanotechnology, Faculty of Science, Urmia University, P.O. Box 165, Urmia 5756151818, Iran.
Polymers (Basel). 2021 Nov 12;13(22):3919. doi: 10.3390/polym13223919.
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. Moreover, it was demonstrated that the catalyst is stable and recyclable.
对具有成本效益材料的兴趣促使研究人员转向使用廉价且丰富的半导体，利用光子能量来产生光催化转化所需的电子和空穴。同时，多晶硅是一种经济的半导体，但其具有带隙高的缺点，可通过碳掺杂来解决。我们采用这种策略，通过一种从柠檬酸和甲基三甲氧基硅烷出发的新方法来合成碳掺杂多晶硅。对所得纳米复合材料进行了全面表征，并与纯多晶硅进行了比较；合成催化剂最显著的特征是紫外-可见吸收增加且向更高波长移动。用钯纳米颗粒对碳掺杂多晶硅进行改性，以获得一种用于甲酸降解的新型多相光催化剂。所得纳米复合材料对甲酸分解进行光催化，产氢周转频率高达690 h⁻¹。此外，还证明了该催化剂稳定且可回收。
