Photoredox catalysis over semiconductors for light-driven hydrogen peroxide production

Zeng, Xiangkang; Liu, Yue; Hu, Xiaoyun; Zhang, Xiwang

doi:10.1039/d0gc04236f

Cited by 257 publications

(167 citation statements)

References 157 publications

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“…[1][2][3][4][5][6] Using abundant sunlight to photo-catalytically split water to H 2 is a dream strategy for sustainable energy production. [7][8][9][10][11][12][13][14] Titanium dioxide (TiO 2 ) is regarded as the most promising photocatalyst for this purpose due to its stability, non-toxicity, and large-scale industrial production. 15,16 However, the hydrogen production performance of TiO 2 under visible light is extremely low, as it can only absorb ultraviolet light at wavelengths shorter than 387 nm, due to its large bandgap.…”

Section: Introductionmentioning

confidence: 99%

Highly efficient doping of titanium dioxide with sulfur using disulfide-linked macrocycles for hydrogen production under visible light

et al. 2022

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Section: Introductionmentioning

confidence: 99%

Highly efficient doping of titanium dioxide with sulfur using disulfide-linked macrocycles for hydrogen production under visible light

et al. 2022

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“…Hydrogen peroxide (H 2 O 2 ) is a widely used industrial product for paper manufacturing, mining and water treatment [1] . Moreover, the COVID‐19 is drawing up the demand of H 2 O 2 as disinfection product due to the constantly spreading infectious disease and the demand is estimated to reach 5.7 million tons by 2027 [1a] . So far, 95 % of global industrial production of H 2 O 2 is from anthraquinone (AQ) oxidation [2] .…”

Section: Figurementioning

confidence: 99%

Efficient Generation of Hydrogen Peroxide and Formate by an Organic Polymer Dots Photocatalyst in Alkaline Conditions

2022

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A photocatalyst comprising binary organic polymer dots (Pdots) was prepared. The Pdots were constructed from poly(9,9-dioctylfluorene-alt-benzothiadiazole), as an electron donor, and 1-[3-(methoxycarbonyl)propyl]-1-phenyl-[6.6]C 61 , as an electron acceptor. The photocatalyst produces H 2 O 2 in alkaline conditions (1 M KOH) with a production rate of up to 188 mmol h À 1 g À 1 . The external quantum efficiencies were 30 % (5 min) and 14 % (75 min) at 450 nm. Furthermore, photo-oxidation of methanol by Pdots, followed by a disproportionation reaction and an oxidation reaction, produced the high-value chemical formate. On the basis of various spectroscopic and electrochemical measurements, the photophysical processes of the system were studied in detail and a reaction mechanism was proposed.

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“…Photoelectric response of PEC sensor: The peroxidase-like activity of some fluorescent nanomaterials originates from the decomposition of H 2 O 2 which may be attributed to that the photogenerated electrons could induce H 2 O 2 to decompose. [43,44] To investigate the PEC response of CSÀ GSHÀ CuNCs/TiO 2 NPs for the oxidized product of xanthine, we tested the photocurrent of different assembled electrodes upon intermittent light irradiation. The results were shown in Figure 4.…”

Section: Chemelectrochemmentioning

confidence: 99%

A photoelectrochemical sensor combining CS−GSH−CuNCs and xanthine oxidase for the detection of xanthine

Chen

Luo

et al. 2022

ChemElectroChem

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A photoelectrochemical (PEC) sensor combining chitosan‐coated and glutathione‐protected copper nanocluster (CS−GSH−CuNCs) with peroxidase‐like activity and xanthine oxidase (XAO) was developed for rapid detection of xanthine. Firstly, CS−GSH−CuNCs was prepared by glutathione (GSH) reduction using chitosan (CS) as protective agent, and then was modified on titanium dioxide nanoparticles (TiO2 NPs)/ITO electrode which was prepared by sintering titanium dioxide (TiO2) on the ITO electrode surface by high temperature calcination. After excited by light at 350 nm, the photoinduced electrons from the lowest unoccupied molecular orbital (LUMO) of CS−GSH−CuNCs were transferred to the conduction band of TiO2, which resulted in spatial separation of electron‐hole and enhancement of photocurrent signal. XAO oxidizes xanthine to produce hydrogen peroxide (H2O2). Part of the photoinduced electrons from CS−GSH−CuNCs transferred and catalyzed the reduction of H2O2, resulting in the reduction of the photocurrent. Under optimal conditions, the PEC sensor exhibits good sensitivity and reproducibility with the limit of detection (LOD) of 6.6 nmol ⋅ L−1 and a relative standard deviation of 3.5 % for 10 replicate detections of 1.00 μmol ⋅ L−1 xanthine and the linear range of 0.04–90.0 μmol ⋅ L−1 for xanthine. Furthermore, the PEC sensor presents nice selectivity owing to its enzyme‐like activity and was successfully applied to human urine, indicating its great potential for real sample analysis.

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Photoredox catalysis over semiconductors for light-driven hydrogen peroxide production

Abstract: Hydrogen peroxide (H2O2) is a commodity chemical applied in diversified products and industries. Nevertheless, its current industrial production process is not sustainable. Photoredox catalysis over semiconductors is a very promising...

Cited by 257 publications

References 157 publications

Highly efficient doping of titanium dioxide with sulfur using disulfide-linked macrocycles for hydrogen production under visible light

Highly efficient doping of titanium dioxide with sulfur using disulfide-linked macrocycles for hydrogen production under visible light

Efficient Generation of Hydrogen Peroxide and Formate by an Organic Polymer Dots Photocatalyst in Alkaline Conditions

A photoelectrochemical sensor combining CS−GSH−CuNCs and xanthine oxidase for the detection of xanthine

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