Journal ArticleDOI
Photocatalytic activity of a hierarchically macro/mesoporous titania.
TLDR
The results reveal that sintering temperature significantly affects the structural stability and photocatalytic activity of titania and may be explained by the existence of macrochannels that increase photoabsorption efficiency and allow efficient diffusion of gaseous molecules.Abstract:
Light-harvesting macroporous channels have been successfully incorporated into a mesoporous TiO2 framework to increase its photocatalytic activity. This bimodal porous material was characterized by X-ray diffractometry in both low-angle and wide-angle ranges, N2 adsorption−desorption analysis, scanning and transmission electron microscopy, FT-IR, and diffuse reflectance spectroscopy. Ethylene photodegradation in gas-phase medium was employed as a probe reaction to evaluate the photocatalytic reactivity of the catalysts. The results reveal that sintering temperature significantly affects the structural stability and photocatalytic activity of titania. The catalyst which calcined at 350 °C possessed an intact macro/mesoporous structure and showed photocatalytic reactivity about 60% higher than that of commercial P25 titania. When the sample was calcined at 500 °C, the macroporous structure was retained but the mesoporous structure was partly destroyed. Further heating at temperatures above 600 °C destroyed ...read more
Citations
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Journal ArticleDOI
Applications of hierarchically structured porous materials from energy storage and conversion, catalysis, photocatalysis, adsorption, separation, and sensing to biomedicine
Ming-Hui Sun,Shaozhuan Huang,Li-Hua Chen,Yu Li,Xiao-Yu Yang,Zhong-Yong Yuan,Bao-Lian Su,Bao-Lian Su,Bao-Lian Su +8 more
TL;DR: Recent progress in the applications of hierarchically structured porous materials from energy conversion and storage, catalysis, photocatalysis, adsorption, separation, and sensing to biomedicine is reviewed and could stimulate researchers to synthesize new advanced hierarchically porous solids.
Journal ArticleDOI
A facile approach to synthesize novel oxygen-doped g-C3N4 with superior visible-light photoreactivity
TL;DR: The O-doping in the g-C(3)N(4) lattice could induce intrinsic electronic and band structure modulation, resulting in its absorbance edge up to 498 nm and enhanced visible-light photoactivity, consequently.
Journal ArticleDOI
Hierarchical porous materials: catalytic applications.
TL;DR: In this review, the phenomenon of complementary macropore incorporation into mesoporous and/or microporous solids in order to enhance their catalytic performance in fuels and chemicals synthesis is discussed.
Journal ArticleDOI
Hierarchically Structured Porous Materials for Energy Conversion and Storage
TL;DR: A state-of-the-art review of the applications of hierarchically structured porous materials in energy conversion and storage is presented in this paper, where hierarchical porosity and structures have been heavily involved in newly developed energy storage and conversion systems, showing the importance of macrochannels in light related systems such as photocatalysis and photovoltaics.
Journal ArticleDOI
Zinc oxide based photocatalysis: tailoring surface-bulk structure and related interfacial charge carrier dynamics for better environmental applications
TL;DR: In this article, the performance of zinc oxide (ZnO) has been improved by tailoring its surface-bulk structure and altering its photogenerated charge transfer pathways with an intention to inhibit the surfacebulk charge carrier recombination.
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