Understanding the growth and photoelectrochemical properties of mesocrystals and single crystals: a case of anatase TiO2

被引：16

作者：

Hong, Zhensheng ^{[1
]}

Dai, Hong ^{[2
]}

Huang, Zhigao ^{[1
]}

Wei, Mingdeng ^{[3
]}

机构：

[1] Fujian Normal Univ, Coll Phys & Energy, Fuzhou 350108, Fujian, Peoples R China

[2] Fujian Normal Univ, Coll Chem & Chem Engn, Fuzhou 350108, Fujian, Peoples R China

[3] Fuzhou Univ, Inst Adv Energy Mat, Fuzhou 350002, Fujian, Peoples R China

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2014年 / 16卷 / 16期

基金：

中国国家自然科学基金;

关键词：

WATER; NANOCRYSTALS; NANOSTRUCTURES; NANORODS; ROUTE;

D O I：

10.1039/c4cp00718b

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Anatase TiO2 mesocrystals and single crystals with dominant {101} facets were successfully synthesized without any additives using titanate nanowires as precursors under solvothermal and hydrothermal conditions, respectively. It is proposed that the oriented self-assembly process for the formation of TiO2 mesocrystals was controlled by the same thermodynamic principle as that of single crystals in this simple reaction system. Furthermore, the TiO2 mesocrystals were applied in photoelectrochemical (PEC) water splitting and demonstrated much enhanced photocurrent, almost 191% and 274% compared with that of TiO2 single crystals and commercial P25, respectively. Electrochemical impedance measurements under illumination revealed that the photocurrent increase was largely ascribed to the effective charge separation of electron-hole pairs and fast interfacial charge transfer. This could be attributed to the intrinsic characteristics of the mesostructured TiO2 composed of highly oriented nanocrystal subunits offering few grain boundaries, nanoporous nature and a short transport distance.

引用

页码：7441 / 7447

页数：7

共 41 条

[21] Investigation of the kinetics of a TiO2 photoelectrocatalytic reaction involving charge transfer and recombination through surface states by electrochemical impedance spectroscopy [J].

Leng, WH ;

Zhang, Z ;

Zhang, JQ ;

Cao, CN .

JOURNAL OF PHYSICAL CHEMISTRY B, 2005, 109 (31) :15008-15023

[22] PHOTOCATALYSIS ON TIO2 SURFACES - PRINCIPLES, MECHANISMS, AND SELECTED RESULTS [J].

LINSEBIGLER, AL ;

LU, GQ ;

YATES, JT .

CHEMICAL REVIEWS, 1995, 95 (03) :735-758

[23] Efficiency of solar water splitting using semiconductor electrodes [J].

Murphy, A. B. ;

Barnes, P. R. F. ;

Randeniya, L. K. ;

Plumb, I. C. ;

Grey, I. E. ;

Horne, M. D. ;

Glasscock, J. A. .

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2006, 31 (14) :1999-2017

[24] A review and recent developments in photocatalytic water-splitting using TiO2 for hydrogen production [J].

Ni, Meng ;

Leung, Michael K. H. ;

Leung, Dennis Y. C. ;

Sumathy, K. .

RENEWABLE & SUSTAINABLE ENERGY REVIEWS, 2007, 11 (03) :401-425

[25] Oriented attachment and mesocrystals:: Non-classical crystallization mechanisms based on nanoparticle assembly [J].

Niederberger, Markus ;

Coelfen, Helmut .

PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2006, 8 (28) :3271-3287

[26] Secondary Branching and Nitrogen Doping of ZnO Nanotetrapods: Building a Highly Active Network for Photoelectrochemical Water Splitting [J].

Qiu, Yongcai ;

Yan, Keyou ;

Deng, Hong ;

Yang, Shihe .

NANO LETTERS, 2012, 12 (01) :407-413

[27] TiO2 Nanotubes: Synthesis and Applications [J].

Roy, Poulomi ;

Berger, Steffen ;

Schmuki, Patrik .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2011, 50 (13) :2904-2939

[28] Three-Dimensional High-Density Hierarchical Nanowire Architecture for High-Performance Photoelectrochemical Electrodes [J].

Shi, Jian ;

Hara, Yukihiro ;

Sun, Chengliang ;

Anderson, Marc A. ;

Wang, Xudong .

NANO LETTERS, 2011, 11 (08) :3413-3419

[29] Solar Water Splitting: Progress Using Hematite (α-Fe2O3) Photoelectrodes [J].

Sivula, Kevin ;

Le Formal, Florian ;

Graetzel, Michael .

CHEMSUSCHEM, 2011, 4 (04) :432-449

[30] Mesocrystals-Ordered Nanoparticle Superstructures [J].

Song, Rui-Qi ;

Coelfen, Helmut .

ADVANCED MATERIALS, 2010, 22 (12) :1301-1330

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