TiO2 superstructures with oriented nanospaces: a strategy for efficient and selective photocatalysis

Nanoscale
Yuta MurakamiTakashi Tachikawa

Abstract

Highly ordered superstructures of semiconductor nanocrystals contain abundant nanometer-scale pores between the crystals; however, there have been difficulties in controlling the size and orientation of these nanospaces without the use of a template or a capping reagent. This constraint has affected their development and applications in potential fields including catalysis and optoelectronics adversely. In this study, we synthesized a rod-shaped TiO2 mesocrystal (TMC) having a length of a few hundreds of micrometers and comprising regularly ordered anatase TiO2 nanocrystals that form oriented nanospaces by exposed {001} facets. Finite-difference time-domain (FDTD) calculations of electric fields and in situ fluorescence imaging with a polarization sensitive dye on a single mesocrystal were performed to reveal anisotropic adsorption and excitation of the dyes. Furthermore, the photodegradation of the dyes was found to be more facilitated in nanospaces formed by the specific facets, as compared with the dyes randomly adsorbed on the outer surfaces. Consequently, the selectivity of photocatalytic reactions based on the molecular size and redox was enhanced by introducing the concept of oriented nanospace.

References

Jun 21, 2002·Nature·Mark E Davis
Jun 9, 2005·Journal of the American Chemical Society·Yasuhiro ShiraishiTakayuki Hirai
Sep 15, 2005·Journal of the American Chemical Society·Yasuhiro ShiraishiTakayuki Hirai
Dec 27, 2005·The Journal of Physical Chemistry. B·Kazuya NaitoTetsuro Majima
Dec 21, 2006·Journal of the American Chemical Society·Kazuya NaitoTetsuro Majima
Jun 19, 2007·Journal of the American Chemical Society·Hexing LiYunfeng Lu
Mar 12, 2008·Langmuir : the ACS Journal of Surfaces and Colloids·Hitoshi KusamaHideki Sugihara
Oct 11, 2008·Langmuir : the ACS Journal of Surfaces and Colloids·Yasuhiro ShiraishiTakayuki Hirai
Sep 14, 2010·Chemical Reviews·Anders HagfeldtHenrik Pettersson
Mar 31, 2011·Chemical Communications : Chem Comm·Gang LiuHui-Ming Cheng
Apr 19, 2011·Journal of the American Chemical Society·Takashi TachikawaTetsuro Majima
Jan 20, 2012·Journal of the American Chemical Society·Wan-Chen HuangMichael H Huang
Mar 27, 2012·Journal of the American Chemical Society·Thomas R GordonChristopher B Murray
Jun 2, 2012·Chemical Society Reviews·Yu RenPeter G Bruce
May 9, 2013·Journal of the American Chemical Society·Tae Kyung KimHoi Ri Moon
Dec 7, 2013·Journal of the American Chemical Society·Zhenfeng BianTetsuro Majima
Jan 23, 2014·Nature Communications·Zhenfeng BianTetsuro Majima
Mar 19, 2014·Chemical Society Reviews·Qi-Long Zhu, Qiang Xu
Mar 26, 2014·Chemical Reviews·Yu BaiPeng Wang
May 24, 2014·Chemical Reviews·Gang LiuHui-Ming Cheng
Jul 8, 2014·ACS Nano·Hengzhong ZhangJillian F Banfield
Sep 23, 2014·Chemical Reviews·Jenny SchneiderDetlef W Bahnemann
Jun 7, 2012·The Journal of Physical Chemistry Letters·Zhenfeng BianTetsuro Majima
Feb 24, 2016·Nature Materials·Kevin WhithamTobias Hanrath
Aug 24, 2016·Chemical Reviews·Michael A BolesDmitri V Talapin
Jan 18, 2017·Chemical Reviews·Jiahui KouRajender S Varma
Jan 21, 2017·Advanced Science·Song BaiYujie Xiong
Aug 5, 2017·Chemical Reviews·Yoshio Nosaka, Atsuko Y Nosaka
Mar 25, 2018·Angewandte Chemie·Ibrahim Halil ÖnerInez M Weidinger
Mar 30, 2018·Advanced Science·Mingbo ZhengHuan Pang
Oct 28, 2019·Nature Communications·Zhujun ZhangTakashi Tachikawa

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Citations

Sep 10, 2020·The Journal of Physical Chemistry Letters·Kaito HanataniKen-Ichi Saitow

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Methods Mentioned

BETA
fluorescence imaging
fluorescence microscopy
X-ray
scanning electron microscopy
electron diffraction
light scattering

Software Mentioned

ULVAC
- PHI
ImageJ
FDTD Solutions
Micro manager

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