Mesoporous SiO2/BiVO4/CuO  nanospheres for Z-scheme, visible light aerobic C–N coupling and dehydrogenation

Ng, Leonard Kia-Sheun; Tan, Eugene Jun-Ching; Goh, Teck Wee; Zhao, Xin; Chen, Zhong; Sum, Tze Chien; Soo, Han Sen

doi:10.1016/j.apmt.2019.01.010

Cited by 33 publications

(19 citation statements)

References 87 publications

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“…Finally, before re-using the catalyst, it was vacuumed at 120°C for 3 h. As shown in Figure 5a, a small decrease of yield was observed with after each reaction cycle which could be ascribed to the fact that a small fraction of the catalyst is lost in each recovery. [38] TEM image testified the stable structure of the solid catalyst after the reuse Figure 5b.…”

Section: Resultsmentioning

confidence: 86%

“…After the titania growth into pore of PMO, the X-ray diffraction low angle for 2.7Ti 3 @Bipy-PMO (selected as best catalysis for FA oxidation) was similar to that of Bipy-PMO. [38] However, PXRD indicated the absence of any crystalline TiO 2 domains (Figure 2a, inset). On the other hand, N 2 adsorptiondesorption isotherms for Bipy-PMO, 1.2Ti 1 @Bipy-PMO and 2.7Ti 3 @Bipy-PMO, as shown in Figure 2c, showed a type IV curve with a hysteresis loop in the relative pressure of 0.45-1.0, which demonstrated the mesoporous structure.…”

Section: Resultsmentioning

confidence: 99%

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Layer‐Wise Titania Growth Within Dimeric Organic Functional Group Viologen Periodic Mesoporous Organosilica as Efficient Photocatalyst for Oxidative Formic Acid Decomposition

et al. 2019

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bridge dimeric organic functional group viologen PMOs synthesized via layer by layer growth on titania (TiO 2 ) has been unprecedently prepared as stable periodic mesoporous organosilica using surfactant under mild acidic conditions. The layer by layer TiO 2 incorporation within the prepared organic functional group viologen-PMO could successfully develop a new type of hybrid photo-oxidation system for the mineralization of formic acid under sunlight irradiation conditions.[a] M.

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Section: Resultsmentioning

confidence: 86%

Section: Resultsmentioning

confidence: 99%

Layer‐Wise Titania Growth Within Dimeric Organic Functional Group Viologen Periodic Mesoporous Organosilica as Efficient Photocatalyst for Oxidative Formic Acid Decomposition

et al. 2019

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“…In the same vein, our team has been keen on exploring alternative value‐added oxidative reactions on organic substrates to be incorporated into PECs for artificial photosynthesis. The exploration of mesoporous silica‐bismuth vanadate‐copper oxide (SiO 2 /BiVO 4 /CuO x , Figure ) core‐shell nanospheres as potential photocatalysts for C−N coupling and dehydrogenation reactions is one such example . As seen in Figure a, the TEM image shows SiO 2 /BiVO 4 /CuO x nanospheres have defined, non‐aggregated, and mesoporous dendritic morphologies, with average particle sizes of around 150 nm.…”

Section: Pecs For Catalytic Synthesesmentioning

confidence: 99%

“…(g) Proposed mechanism for light absorption by a Z‐scheme in the SiO 2 /BiVO 4 /CuO x nanospheres used to drive the photooxidative coupling of benzylamines to imines. This figure was adapted from reference 48c …”

Section: Pecs For Catalytic Synthesesmentioning

confidence: 99%

Photoelectrochemical Cells for Artificial Photosynthesis: Alternatives to Water Oxidation

Boruah

Chin

et al. 2020

ChemNanoMat

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Photoelectrochemical cells have been used as one of the most common artificial photosynthetic approaches to mimic natural photosynthetic water splitting reactions. However, despite the tremendous advances made to improve the affordability and efficiency of photoelectrochemical water splitting, it is still not an economically feasible method to produce solar fuels currently since only the H 2 evolving reduction half-reaction generates valuable fuels. Therefore, in this review, we intend to highlight other underexplored substrates and reactions for producing solar fuels in photo-electrochemical cells, as well as alternative architectures including temporally independent and biohybrid systems. We show that besides water oxidation, electrocatalytic or photoredox reactions for pollutant degradation, biomass valorization, and organic chemical synthesis can be or have been successfully adapted for photoelectrochemical cells, thus offering a virtually infinite number of possibilities for artificial photosynthetic applications which generate valuable products in both the reduction and oxidation half reactions.

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“…Against this backdrop, our group has been actively pursuing photoredox catalytic processes that can generate value‐added organic precursors or degrade pollutants, and can eventually be integrated into AP systems (Figure B). Notably, we developed vanadium(V) photocatalysts ( 2a–2f , Figure S1, Supporting Information) that can selectively cleave the activated CC bond adjacent to the benzylic alcohol in lignin model substrates ( Figure ) .…”

Section: Introductionmentioning

confidence: 99%

Visible Light–Driven Cascade Carbon–Carbon Bond Scission for Organic Transformations and Plastics Recycling

et al. 2019

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Significant efforts are devoted to developing artificial photosynthetic systems to produce fuels and chemicals in order to cope with the exacerbating energy and environmental crises in the world now. Nonetheless, the large-scale reactions that are the focus of the artificial photosynthesis community, such as water splitting, are thus far not economically viable, owing to the existing, cheaper alternatives to the gaseous hydrogen and oxygen products. As a potential substitute for water oxidation, here, a unique, visible light-driven oxygenation of carboncarbon bonds for the selective transformation of 32 unactivated alcohols, mediated by a vanadium photocatalyst under ambient, atmospheric conditions is presented. Furthermore, since the initial alcohol products remain as substrates, an unprecedented photodriven cascade carboncarbon bond cleavage of macromolecules can be performed. Accordingly, hydroxyl-terminated polymers such as polyethylene glycol, its block co-polymer with polycaprolactone, and even the non-biodegradable polyethylene can be repurposed into fuels and chemical feedstocks, such as formic acid and methyl formate. Thus, a distinctive approach is presented to integrate the benefits of photoredox catalysis into environmental remediation and artificial photosynthesis.

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Mesoporous SiO2/BiVO4/CuO nanospheres for Z-scheme, visible light aerobic C–N coupling and dehydrogenation

Cited by 33 publications

References 87 publications

Layer‐Wise Titania Growth Within Dimeric Organic Functional Group Viologen Periodic Mesoporous Organosilica as Efficient Photocatalyst for Oxidative Formic Acid Decomposition

Layer‐Wise Titania Growth Within Dimeric Organic Functional Group Viologen Periodic Mesoporous Organosilica as Efficient Photocatalyst for Oxidative Formic Acid Decomposition

Photoelectrochemical Cells for Artificial Photosynthesis: Alternatives to Water Oxidation

Visible Light–Driven Cascade Carbon–Carbon Bond Scission for Organic Transformations and Plastics Recycling

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