Bidentate carboxylate linked TiO2 with NH2-MIL-101(Fe) photocatalyst: a conjugation effect platform for high photocatalytic activity under visible light irradiation

Ma, Yingqun; Lu, Yunfeng; Hai, Guangtong; Dong, Wenjun; Li, Rongjie; Liu, Jinghai; Wang, Ge

doi:10.1016/j.scib.2020.02.001

Cited by 130 publications

(27 citation statements)

References 65 publications

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“…Conversely, E − can interact with O 2 adsorbed on the C surface to generate superoxide radicals (·O 2 − ), as well as hydroxyl radicals (·OH) and other ROS such as H 2 O 2 22 . Studies have indicated that TiO 2 ‐based photocatalytic sterilization results primarily from the interaction between ·OH radicals 23 and other ROS (e.g. ·O 2 − , ·OOH and H 2 O 2 ) with C 24 .…”

Section: Resultsmentioning

confidence: 99%

The facile fabrication and structural control of carbon‐MIL‐125 by coupling pre‐hydrolysate and Ti‐MOF for photocatalytic sterilization under visible light

Sha

et al. 2021

J of Chemical Tech & Biotech

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BACKGROUND Carbon‐MIL‐125 can be successfully prepared from pre‐hydrolysate and metal oxide TiO2 (Ti‐MOF) by coupling hydrothermal and carbonization processes. The use of this pre‐hydrolysate to prepare carbon (C)‐based materials could provide a value‐added product and allow the more complete use of bioresources. Combining the photocatalytic bactericidal properties of Ti‐MOF and adsorption capacity of biomass‐based C materials could further improve the antibacterial efficiency of the materials, and C could expand the response range of TiO2 to light and reduce the reorganization rate of photogenerated electrons and holes. This strategy could potentially increase the rate and efficiency of catalytic reactions. RESULTS The morphologies and structures of samples were controlled via one‐ and two‐step routes. The obtained samples exhibited 1‐2 μm size and different morphologies. C1‐MIL‐125 showed a spherical morophology via ont‐step, C2‐MIL‐125 displayed a new type of rough tablet structure via two‐step. Meanwhile, Ti exists in the form of the mixture of TiO2 in the anatase and rutile phases. The catalytic activity of mixed TiO2 forms is higher than pure anatase or rutile, removal of Escherichia coli could reach 99.00% and 98.67% under a xenon lamp via one‐ and two‐step processes, respectively. CONCLUSION This work could realize high value‐added utilization of biomass and is expected to provide new prospects for the design of superior photocatalysts for water disinfection. © 2021 Society of Chemical Industry

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Section: Resultsmentioning

confidence: 99%

The facile fabrication and structural control of carbon‐MIL‐125 by coupling pre‐hydrolysate and Ti‐MOF for photocatalytic sterilization under visible light

Sha

et al. 2021

J of Chemical Tech & Biotech

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“…The chemical structures of CTF-NS samples were further characterized by 13 C cross-polarization magic angle spinning (CP-MAS) solid-state nuclear magnetic resonance (NMR) spectroscopy and Fourier transformed infrared (FTIR) spectroscopy. As shown in Figure 2e, their solid state 13 C NMR spectra display a pronounced signal at ≈170 ppm, which can be assigned to the sp 2 carbon (CN) in triazine units and thereby signals the formation of triazine groups. [41] Moreover, the characteristic BT signal at around 162 ppm is also observed for CTF-NS-5BT, indicating the incorporating of BT units into the conjugated networks.…”

Section: Resultsmentioning

confidence: 99%

“…Inorganic semiconductors (such as TiO 2 ) have been investigated for photocatalytic H 2 O 2 production. [10][11][12][13] However, they usually suffer from low H 2 O 2 production rate owing to their narrow light absorption range and undesirable catalytic degradation of H 2 O 2 on transition metals. [14][15] To this end, polymeric photocatalysts, exemplified by graphitic carbon nitride (g-C 3 N 4 ), have attracted increasing attention in recent years because of their tunable chemical structures and metal-free composition.…”

mentioning

confidence: 99%

Electronic Tuning of Covalent Triazine Framework Nanoshells for Highly Efficient Photocatalytic H₂O₂ Production

Viengkeo

et al. 2021

Advanced Sustainable Systems

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and sustainable production technologies is highly urgent. Among many potential options, semiconductor-based photocatalytic H 2 O 2 synthesis from two-electron oxygen reduction at ambient conditions offers a promising strategy, which only uses clean and sustainable solar energy as the energy input. [8][9] The challenge is to explore advanced semiconductor photocatalysts with efficient charge-separation efficiency and favorable surface properties in order to shift the reaction pathway toward the desired H 2 O 2 product. Inorganic semiconductors (such as TiO 2 ) have been investigated for photocatalytic H 2 O 2 production. [10][11][12][13] However, they usually suffer from low H 2 O 2 production rate owing to their narrow light absorption range and undesirable catalytic degradation of H 2 O 2 on transition metals. [14][15] To this end, polymeric photocatalysts, exemplified by graphitic carbon nitride (g-C 3 N 4 ), have attracted increasing attention in recent years because of their tunable chemical structures and metal-free composition. [16][17][18][19] Previous studies revealed that the tri-s-triazine units in g-C 3 N 4 could facilitate the two-electron oxygen reduction by forming a complex with the O 2•− intermediate. [20][21][22] Despite the potential, their demonstrated photocatalytic activities were still unsatisfactory for practical applications.Covalent triazine frameworks (CTFs), as a new class of nitrogen-rich organic photocatalysts, have recently emerged owing to their excellent photocatalytic activities and stability for photocatalytic water splitting, [23][24][25][26] CO 2 reduction, [27][28] N 2 fixation, [29] and organic transformation. [30][31][32] In principle, their chemical and electronic structures can be precisely tuned by varying the corresponding precursors and synthetic routes, making them a versatile platform for designing photocatalysts on demand. [33] Notably, CTFs have intrinsic structural similarity to the polymeric skeletons of g-C 3 N 4 , both of which are constructed from primary triazine units. [34][35][36] This may imply the great potential of CTFs for photocatalytic H 2 O 2 production via the two-electron oxygen reduction. However, their applications in this field have been rarely studied up to now. Recently, Xu and co-workers first reported that the acetylene and diacetylenefunctionalized CTFs could be used as effective photocatalysts for photocatalytic H 2 O 2 production under visible light irradiation. [37] Unfortunately, their photocatalytic efficiency was quite

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“…In the present work, a novel strategy was proposed by utilizing metal-organic frameworks (MOFs) nanoparticles as the photo-sensitive materials of 2DLM-based photodetectors. MOFs formed by the coordination of metal ions and organic ligands exhibit highly tailorable bandgap, optical absorbance and electrical conductivity through varying the metal, ligand, and/or the growth conditions [22][23][24][25][26][27][28], which can be applied to different situations in line with the requirements of detection bands. Among them, MOF (Ni-CAT-1) possesses a narrow bandgap of 0.48 eV and strong optical absorption in the SWIR region [29,30], making it appropriate to combine with 2DLM to achieve high-performance SWIR photodetection.…”

Section: Introductionmentioning

confidence: 99%

High-sensitivity shortwave infrared photodetectors of metal-organic frameworks integrated on 2D layered materials

Wang

Zhang

et al. 2021

Sci. China Mater.

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Photodetectors operating in the shortwave infrared region are of great significance due to their extensive applications in both commercial and military fields. Narrowbandgap two-dimensional layered materials (2DLMs) are considered as the promising candidates for constructing nextgeneration high-performance infrared photodetectors. Nevertheless, the performance of 2DLMs-based photodetectors can hardly satisfy the requirements of practical applications due to their weak optical absorption. In the present study, a strategy was proposed to design high-performance shortwave infrared photodetectors by integrating metalorganic frameworks (MOFs) nanoparticles with excellent optical absorption characteristics and 2DLM with high mobility. Further, this study demonstrated the practicability of this strategy in a MOF/2DLM (Ni-CAT-1/Bi 2 Se 3 ) hybrid heterojunction photodetector. Due to the transfer of photo-generated carriers from the MOF to Bi 2 Se 3 , the MOF nanoparticles integrated on the Bi 2 Se 3 layer can increase the photocurrent by 2-3 orders of magnitude. The resulting photodetector presented a high responsivity of 4725 A W −1 and a superior detectivity of 3.5 × 10 13 Jones at 1500 nm. The outstanding performance of the hybrid heterojunction arises from the synergistic function of the enhanced optical absorption and photogating effect. In addition, the proposed device construction strategy combining MOF photosensitive materials with 2DLMs shows a high potential for the future high-performance shortwave infrared photodetectors.

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Bidentate carboxylate linked TiO2 with NH2-MIL-101(Fe) photocatalyst: a conjugation effect platform for high photocatalytic activity under visible light irradiation

Cited by 130 publications

References 65 publications

The facile fabrication and structural control of carbon‐MIL‐125 by coupling pre‐hydrolysate and Ti‐MOF for photocatalytic sterilization under visible light

The facile fabrication and structural control of carbon‐MIL‐125 by coupling pre‐hydrolysate and Ti‐MOF for photocatalytic sterilization under visible light

Electronic Tuning of Covalent Triazine Framework Nanoshells for Highly Efficient Photocatalytic H₂O₂ Production

High-sensitivity shortwave infrared photodetectors of metal-organic frameworks integrated on 2D layered materials

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Bidentate carboxylate linked TiO2 with NH2-MIL-101(Fe) photocatalyst: a conjugation effect platform for high photocatalytic activity under visible light irradiation

Cited by 130 publications

References 65 publications

The facile fabrication and structural control of carbon‐MIL‐125 by coupling pre‐hydrolysate and Ti‐MOF for photocatalytic sterilization under visible light

The facile fabrication and structural control of carbon‐MIL‐125 by coupling pre‐hydrolysate and Ti‐MOF for photocatalytic sterilization under visible light

Electronic Tuning of Covalent Triazine Framework Nanoshells for Highly Efficient Photocatalytic H2O2 Production

High-sensitivity shortwave infrared photodetectors of metal-organic frameworks integrated on 2D layered materials

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Electronic Tuning of Covalent Triazine Framework Nanoshells for Highly Efficient Photocatalytic H₂O₂ Production