Journal ArticleDOI
Raman spectroscopy: a new approach to measure the percentage of anatase tio2 exposed (001) facets
F Tian,Yupeng Zhang,Jing Zhang +2 more
TLDR
In this paper, the authors introduced a novel approach for quantitatively measuring the percentage of exposed {001} facets in anatase TiO2 by using Raman spectroscopy, which provided a high sensitivity and accuracy for measuring the exposed facets from the micro perspective of molecular bonding with less measurement errors.Abstract:
Controlling the growth of high-activity anatase TiO2 exposed {001} facets improves greatly the adsorption and electronic and photocatalytic properties and has been attractive for various environmental and energy-related applications. In this paper, we introduced a novel approach for quantitatively measuring the percentage of exposed {001} facets in anatase TiO2 by using Raman spectroscopy. Comparing to XRD, Raman peaks originate from the vibration of molecular bonds, that is, vibrational mode Eg and A1g peaks, which are related to different crystal planes. Therefore, it provided a high sensitivity and accuracy for measuring the percentage of the exposed facets from the micro perspective of molecular bonding with less measurement errors. With the photocatalytic experiments, we found that 50% was the optimal percentage of the exposed {001} facets for the highest efficiency, which seemed more reasonable than the value of 70% obtained from XRD.read more
Citations
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Journal ArticleDOI
Tuning Oxygen Vacancies in Ultrathin TiO2 Nanosheets to Boost Photocatalytic Nitrogen Fixation up to 700 nm
Yunxuan Zhao,Yufei Zhao,Run Shi,Bin Wang,Geoffrey I. N. Waterhouse,Li-Zhu Wu,Chen-Ho Tung,Tierui Zhang +7 more
TL;DR: This study offers a promising and sustainable route for the fixation of atmospheric N2 using solar energy by synthesising defect-rich ultrathin anatase nanosheets with an abundance of oxygen vacancies and intrinsic compressive strain through a facile copper-doping strategy.
Journal ArticleDOI
Synergy of Low-Energy {101} and High-Energy {001} TiO2 Crystal Facets for Enhanced Photocatalysis
TL;DR: It is demonstrated that the presence of both the high-energy {001} oxidative and low-energy{101} reductive facets in an optimum ratio is necessary to reduce the charge recombination and thereby enhance photocatalytic activity of TiO2 NCs.
Journal ArticleDOI
Probing the Optical Property and Electronic Structure of TiO2 Nanomaterials for Renewable Energy Applications
TL;DR: Probing the Optical Property and Electronic structure of TiO2 Nanomaterials for Renewable Energy Applications and its applications in renewable energy applications is studied.
Journal ArticleDOI
Highly reactive {001} facets of TiO2-based composites: synthesis, formation mechanism and characterization
TL;DR: This review encompasses the state-of-the-art research activities and latest advancements in the design of highly reactive {001} facet-dominated TiO2via various strategies, including hydrothermal/solvothermal, high temperature gas phase reactions and non-hydrolytic alcoholysis methods.
Journal ArticleDOI
Constructing Anatase TiO2 Nanosheets with Exposed (001) Facets/Layered MoS2 Two-Dimensional Nanojunctions for Enhanced Solar Hydrogen Generation
Yong-Jun Yuan,Zhi-Jun Ye,Hongwei Lu,Bin Hu,Yong-Hui Li,Daqin Chen,Jiasong Zhong,Zhen-Tao Yu,Zhigang Zou +8 more
TL;DR: In this paper, a feasible strategy of two-dimensional nanojuctions to enhance solar hydrogen generation of the MoS2/TiO2 system was demonstrated, and the 2D-2D MoS 2 /TiO 2 composite exhibits photocatalytic activity much higher than those of noble metal (such as Pt, Rh, Ru, Pd, and Au) loaded TiO2 photocatalyst, while the apparent quantum yield of hydrogen evolution system reached 6.4% at 360 nm.
References
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Journal ArticleDOI
Electrochemical Photolysis of Water at a Semiconductor Electrode
Akira Fujishima,Kenichi Honda +1 more
TL;DR: Water photolysis is investigated by exploiting the fact that water is transparent to visible light and cannot be decomposed directly, but only by radiation with wavelengths shorter than 190 nm.
Journal ArticleDOI
Anatase TiO(2) single crystals with a large percentage of reactive facets
Hua Gui Yang,Chenghua Sun,Shi-Zhang Qiao,Jin Zou,Gang Liu,Sean C. Smith,Hui-Ming Cheng,Gao Qing Lu +7 more
TL;DR: This work synthesized uniform anatase TiO2 single crystals with a high percentage (47 per cent) of {001} facets using hydrofluoric acid as a morphology controlling agent and demonstrates that for fluorine-terminated surfaces this relative stability is reversed.
Journal ArticleDOI
Effects of F- Doping on the Photocatalytic Activity and Microstructures of Nanocrystalline TiO2 Powders
TL;DR: In this article, a novel and simple method for preparing highly photoactive nanocrystalline F-doped TiO2 photocatalyst with anatase and brookite phase was developed by hydrolysis of titanium tetraisopropoxide in a mixed NH4F−H2O solution.
Journal ArticleDOI
Synthesis of Titania Nanosheets with a High Percentage of Exposed (001) Facets and Related Photocatalytic Properties
TL;DR: Anatase TiO(2) nanosheets with highly reactive facets exposed have been successfully synthesized by a facile hydrothermal route, taking advantage of a specific stabilization effect of fluorine ion on (001) facets.
Journal ArticleDOI
Solvothermal synthesis and photoreactivity of anatase TiO(2) nanosheets with dominant {001} facets.
Hua Gui Yang,Gang Liu,Shi-Zhang Qiao,Chenghua Sun,Yong Gang Jin,Sean C. Smith,Jin Zou,Hui-Ming Cheng,Gao Qing Max Lu +8 more
TL;DR: The addition of 2-propanol can strengthen the stabilization effect associated with fluorine adsorption over (001) surface and thus stimulate its preferred growth, and the as-prepared anatase TiO(2) single-crystal nanosheets having 64% {001} facets show superior photoreactivity compared to P25 as a benchmarking material.
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