Core-shell silicon@mesoporous TiO2 heterostructure: Towards solar-powered photoelectrochemical conversion
Author(s)
Pal, Manas
Wu, Hao
Jing, Yunke
Li, Xiaomin
Zhu, Hongwei
Wang, Changyao
Wang, Shuai
Al-Enizi, Abdullah M
Deng, Yonghui
Zheng, Gengfeng
Zhao, Dongyuan
Griffith University Author(s)
Year published
2016
Metadata
Show full item recordAbstract
Core–shell heterostructured nanomaterials with mesopores have enormous potential applications in diverse fields. Herein, we report a facile extended Stöber method to synthesize core–shell heterostructured semiconducting nanomaterials with mesoporosity. Silver (Ag) metal-assisted chemically wet etched p-type silicon nanowires (Si NWs) were used as the core, and layer-controllable mesoporous n-type anatase TiO2 was grown as the shell to successfully fabricate the core–shell p-Si@mesoporous n-TiO2 hybrid materials. Detailed characterization reveals that the TiO2 shell was composed of aggregated crystalline TiO2 nanoparticles ...
View more >Core–shell heterostructured nanomaterials with mesopores have enormous potential applications in diverse fields. Herein, we report a facile extended Stöber method to synthesize core–shell heterostructured semiconducting nanomaterials with mesoporosity. Silver (Ag) metal-assisted chemically wet etched p-type silicon nanowires (Si NWs) were used as the core, and layer-controllable mesoporous n-type anatase TiO2 was grown as the shell to successfully fabricate the core–shell p-Si@mesoporous n-TiO2 hybrid materials. Detailed characterization reveals that the TiO2 shell was composed of aggregated crystalline TiO2 nanoparticles with diameters of ≈15 nm, where the TiO2 coating thickness was tuned ≈50 nm. The interstitial pores of these nanoparticles were observed with average pore sizes of 4–8 nm. The core–shell structured p-Si@mesoporous n-TiO2 hybrid materials were demonstrated as photocathodes for the solar-driven photoelectrochemical (PEC) production of H2 at the semiconductor/electrolyte interface.
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View more >Core–shell heterostructured nanomaterials with mesopores have enormous potential applications in diverse fields. Herein, we report a facile extended Stöber method to synthesize core–shell heterostructured semiconducting nanomaterials with mesoporosity. Silver (Ag) metal-assisted chemically wet etched p-type silicon nanowires (Si NWs) were used as the core, and layer-controllable mesoporous n-type anatase TiO2 was grown as the shell to successfully fabricate the core–shell p-Si@mesoporous n-TiO2 hybrid materials. Detailed characterization reveals that the TiO2 shell was composed of aggregated crystalline TiO2 nanoparticles with diameters of ≈15 nm, where the TiO2 coating thickness was tuned ≈50 nm. The interstitial pores of these nanoparticles were observed with average pore sizes of 4–8 nm. The core–shell structured p-Si@mesoporous n-TiO2 hybrid materials were demonstrated as photocathodes for the solar-driven photoelectrochemical (PEC) production of H2 at the semiconductor/electrolyte interface.
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Journal Title
ChemNanoMat
Volume
2
Issue
7
Subject
Macromolecular and materials chemistry
Nanotechnology
Science & Technology
Physical Sciences
Technology
Chemistry, Multidisciplinary
Nanoscience & Nanotechnology