Probing significant light absorption enhancement of titania inverse opal films for highly exalted photocatalytic degradation of dye pollutants

Wu, Min; Liu, Jing; Jin, Jun; Wang, Chao; Huang, Shaozhuan; Deng, Zhao; Su, Bao‐Lian

doi:10.1016/j.apcatb.2013.12.037

Cited by 69 publications

(78 citation statements)

References 58 publications

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“…2D). [16][17][18][19] Although the BT Fs has the same local structure of inverse opal as BTIOs (Fig. S5 †) are 24.5 m 2 g À1 for BTIOs, 11.7 m 2 g À1 for WTIOs, and 49.5 m 2 g À1 for P25, respectively.…”

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confidence: 92%

“…1D). 20 The spherical pores still exhibited an fcc structure, and the spherical pore size of WTIOs was approximately equal to 290 nm, revealing a shrinkage 16,20 of approximately 19% compared with the diameter of the PS nanosphere template. 1C and S1 †).…”

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confidence: 98%

“…[2][3][4][5][6][7][8][9][10][11][12][13][14][15] The improved visible-light photoresponse of BT is enabled by the self-doping Ti 3+ defects 2,3,6,15 and/or by external Ti-H and O-H bonds. [16][17][18][19][20] Thus, the combination of well-ordered inverse opal structure and chemical hydrogenation should enable BTIOs to enhance the light absorption and further improve the photocatalysis. 2,3 Thus, BT opens new opportunities for visible-light active TiO 2 .…”

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confidence: 99%

“…To evaluate the effect of the inverse opal structure on the catalytic activity, the results for BTIOs fragments (BT Fs, Fig. S4 †) show that the band gaps of BTIOs and WTIOs are $2.77 eV 5,9 and $3.08 eV, 16 respectively. 4A (Fig.…”

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Black TiO₂ inverse opals for visible-light photocatalysis

Xin

2015

RSC Adv.

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Black titanium dioxide (TiO 2 ) inverse opals (BTIOs) were obtained by in situ H 2 reduction of white TiO 2 inverse opals (WTIOs). The combination of chemical hydrogenation and well-ordered inverse opal structure provides BTIOs with a better photocatalytic activity than the structure-related WTIOs, fragments of BTIOs, and P25 under visible light. Fig. 4 Degradation of methylene blue over BTIOs, WTIOs, BT Fs and P25 (A), and the apparent rate constant (k, h À1 ) of BTIOs in ten-time recycling (B).This journal is

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Black TiO₂ inverse opals for visible-light photocatalysis

Xin

2015

RSC Adv.

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“…13,14 Secondly, the uniform macroporous structure improves mass transport and reduces electron-hole recombination rate. [15][16][17] More importantly, at the edge of photonic bandgaps, the group velocity of the light is significantly slowed down, becoming anomalously small, owing to the effect of nonlinear dispersion, creating "slow photons"; when the energy of slow photons is in resonance with the absorption edge of the material which is usually of low absorbance, the photon absorption can be enhanced. [18][19][20] By matching the red or blue edge of photonic stopbands with the electronic excitation energy of the material, more than 2 fold enhancement of photocatalytic efficiency of TiO 2 has been demonstrated.…”

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confidence: 99%

Sandwich-structured TiO₂ inverse opal circulates slow photons for tremendous improvement in solar energy conversion efficiency

et al. 2017

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To cite this version:Photon management has enabled a true revolution in the development of high-performance semiconductor materials and devices. Harnessing the highest amount of energy from photon relies on an ability to design and fashion structures to trap the light for the longer time inside the device for more electron excitation. The light harvesting efficiency in many thin-film optoelectronic devices is limited due to low photon absorbance. Here we demonstrate for the first time that slow photon circulation in sandwich-structured photonic crystals with two stopbands fine tuned are ideally suited to enhance and spectrally engineer light absorption. The sandwich-structured TiO 2 inverse opal possesses two stopbands, whose blue or red edge is respectively tuned to overlap with TiO 2 electronic excitation energy, thereby circulating the slow photons in the middle layer and enhancing light scattering at layer interfaces. This concept, together with the significantly increased control over photon management opens up tremendous opportunities for the realization of a wide range of highperformance, optoelectronic devices, and photochemical reactions.

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