Host-guest assemblies of anchoring molecular catalysts of CO2 reduction onto CuInS2/ZnS quantum dots for robust photocatalytic syngas production in water

Ren, Ying-Yi; Wu, Xia; Deng, Bo-Yi; Liu, Jing; Wang, Rui

doi:10.1016/j.mcat.2022.112168

Cited by 12 publications

(15 citation statements)

References 55 publications

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“…Upon reduction scan of CoPh in a 0.1 M n Bu 4 NPF 6 solution in DMF under a N 2 atmosphere, two reduction processes at −1.23 V and −1.33 V (all potentials discussed here are vs. NHE) emerge, which are attributed to Co II /Co I and Co I /Co 0 reduction, respectively. 8,26,41,42 Under a CO 2 atmosphere, a current intensity increase begins at the first reduction peak, which indicates that CO 2 electrocatalysis occurs. 8,26,42 According to our previous studies, the Co I species is attributed to the active species to bind CO 2 in the course of CO 2 electrocatalysis.…”

Section: Resultsmentioning

confidence: 98%

“…Another portion of the electrons transfer to TiO 2 . On the one hand, the Co I species as an active site binds CO 2 and catalyses CO 2 reduction to afford CO. 8,26,42 This is the main route to CO formation of the ternary photocatalyst. In another hand, the surface of TiO 2 NPs mediates proton reduction to generate H 2 by using electrons received from the QDs.…”

Section: Resultsmentioning

confidence: 99%

“…The different CO : H 2 ratios of syngas satisfy different Fischer-Tropsch processes, for example, syngas with a CO : H 2 ratio of 1 : 1, 1 : 2, or 1 : 3 can be used for gasoline, methanol, or methane production. [7][8][9][10][11] Traditionally, syngas used in industry is produced mainly from energy-consuming processes, such as natural gas conversion at high temperatures or methane oxidation. The conversion of protons and CO 2 to H 2 and CO, respectively, through a photocatalytic system is considered a cleaner and energy-saving method to syngas production.…”

Section: Introductionmentioning

confidence: 99%

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An assembled ternary photocatalyst CoPh/CdSe@TiO2 for simultaneous photocatalytic CO₂and proton reduction

Deng

et al. 2023

Mater. Chem. Front.

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Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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An assembled ternary photocatalyst CoPh/CdSe@TiO2 for simultaneous photocatalytic CO₂and proton reduction

Deng

et al. 2023

Mater. Chem. Front.

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“…Tungsten trioxide (WO 3 ) is an n-type semiconductor with band gap in the range 2.6–3 eV, high-charge carrier mobility (excellent conductivity), and (photo)corrosion stability in a wide pH range [ 39 , 67 ]. However, the application of bare WO 3 as a photocatalyst is limited due to its lower CB energy level, which favors the rapid recombination of e − /h + pairs and slows down the O 2 reduction to superoxide radical anions (O 2 − •), with effect on organic pollutant degradation.…”

Section: Zinc Sulfide-based Heterostructures Photocatalysts For Organ...mentioning

confidence: 99%

“…To overcome these impediments, various strategies have been used to improve the photocatalytic performance of ZnS NSs by adjusting band gap energy (to absorb Vis light), such as morphology engineering [ 23 , 24 ], metal/non-metal doping [ 3 , 9 , 25 , 26 ], defect engineering [ 26 , 27 , 28 , 29 ], dye sensitization [ 18 ], and heterostructures construction [ 30 , 31 , 32 , 33 , 34 , 35 , 36 ]. However, nanostructured ZnS materials have versatile potential applications in optoelectronic devices (e.g., flat-panel displays, injection lasers, UV light-emitting diodes, electroluminescent sensors, and infrared windows [ 5 , 37 , 38 ]) and as photocatalysts in the following processes: (a) green synthesis of organic compounds (e.g., substituted tetrazoles and xanthene and its derivatives [ 5 ]), (b) syngas production in water [ 39 ], (c) CO 2 photoreduction [ 40 ], and (d) H 2 production via water splitting [ 27 , 41 , 42 , 43 ].…”

Section: Introductionmentioning

confidence: 99%

Recent Developments in ZnS-Based Nanostructures Photocatalysts for Wastewater Treatment

Isac

Eneşca

2022

IJMS

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The continuous growth of the world population has led to the constant increase of environmental pollution, with serious consequences for human health. Toxic, non-biodegradable, and recalcitrant organic pollutants (e.g., dyes, pharmaceuticals, pesticides) are discharged into water resources from various industries, such as textiles, leather, pharmaceuticals, plastics, etc. Consequently, the treatment of industrial wastewater, via a sustainable technology, represents a great challenge for worldwide research. Photocatalytic technology, an innovative technique based on advanced oxidation process (AOP), is considered a green technology with promising prospects in the remediation of global environmental issues. In photocatalysis, a very important role is attributed to the photocatalyst, usually a semiconductor material with high solar light absorption capacity and conductivity for photogenerated-charge carriers. Zinc sulfide (ZnS), as n-type semiconductor with different morphologies and band gap energies (Eg = 3.2–3.71 eV), is recognized as a promising photocatalyst for the removal of organic pollutants from wastewater, especially under UV light irradiation. This review deals with the recent developments (the last five years) in ZnS nanostructures (0D, 1D, 3D) and ZnS-based heterojunctions (n-n, n-p, Z scheme) used as photocatalysts for organic pollutants’ degradation under simulated (UV, Vis) and sunlight irradiation in wastewater treatment. The effects of different synthesis parameters (precursors’ type and concentration, capping agents’ dosages, reaction time and temperature, metal doping, ZnS concentration in heterostructures, etc.) and properties (particle size, morphology, band gap energy, and surface properties) on the photocatalytic performance of ZnS-based photocatalysts for various organic pollutants’ degradation are extensively discussed.

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Recent Advances and Perspectives of Core‐Shell Nanostructured Materials for Photocatalytic CO₂ Reduction

Wang

Chen

et al. 2022

Small

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recombination of photogenerated charges, as well as limited catalytic reactivity and stability. [9] As a result, various approaches including constructive bandgap engineering, [10] defect engineering, [11] junction engineering, [12] and morphology control, have been proposed to enhance the photocatalytic CO 2 reduction performance. Among them, morphology control strategy could obtain multi-dimensional structures such as 0D quantum dots, 1D nanorods/nanowires, 2D nanosheets, and 3D porous/hollow structures or core-shell structures. [13,14] A great deal of work confirmed that photocatalysts with different morphologies exhibited better photocatalytic activity than bulk nanomaterials. [15] These structurally modified materials have attracted considerable interest in the field of photocatalysis owing to their large specific surface area, improved light absorption, and shortened charge carrier transport pathways. [14,16] Notably, because of the low density, tunable capacity, and molecular loading of hollow shell structures, core/yolk-shell nanoparticles have been extensively developed. [17] This special morphology contains both inner and outer surfaces, which can provide a superior platform for the deposition of other components. The activity of nano-semiconductor photocatalytic reduction of CO 2 has been significantly promoted through the construction of the core-shell structure.Recently, many hierarchical systems of core-shell structures have been designed and fabricated. Due to the unique sizedependent electronic, optical, and adsorption properties, coreshell structured nanomaterials have broad applicability. [18] Nowadays, with the increasing interest in core-shell catalysts, their definition has been extended to include structures with distinct boundaries between the two or more constituent materials, whereby the inner materials are partially or completely encapsulated (even chemically bonded) by the outer materials. Semiconductor materials [19] have been characterized by good optical and chemical properties, making them ideal candidates for photocatalytic energy conversion applications. Core-shell semiconductor materials of single-layer or multi-layer shell structures could be synthesized using the template method, precipitation method, or hydrothermal method. Metals (such as Ag, Au, Cu, and Pt) or metal alloys could be used as cores to integrate with other catalytic materials to form single-core or multicore structures. [20,21] Materials such as layered double hydroxides (LDHs) [22] and MXenes [23] have been the most commonly Photocatalytic CO 2 conversion into solar fuels is a promising technology to alleviate CO 2 emissions and energy crises. The development of core-shell structured photocatalysts brings many benefits to the photocatalytic CO 2 reduction process, such as high conversion efficiency, sufficient product selectivity, and endurable catalyst stability. Core-shell nanostructured materials with excellent physicochemical features take an irreplaceable position in the field of photocatalytic CO 2 reduc...

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Host-guest assemblies of anchoring molecular catalysts of CO2 reduction onto CuInS2/ZnS quantum dots for robust photocatalytic syngas production in water

Cited by 12 publications

References 55 publications

An assembled ternary photocatalyst CoPh/CdSe@TiO2 for simultaneous photocatalytic CO₂and proton reduction

An assembled ternary photocatalyst CoPh/CdSe@TiO2 for simultaneous photocatalytic CO₂and proton reduction

Recent Developments in ZnS-Based Nanostructures Photocatalysts for Wastewater Treatment

Recent Advances and Perspectives of Core‐Shell Nanostructured Materials for Photocatalytic CO₂ Reduction

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Host-guest assemblies of anchoring molecular catalysts of CO2 reduction onto CuInS2/ZnS quantum dots for robust photocatalytic syngas production in water

Cited by 12 publications

References 55 publications

An assembled ternary photocatalyst CoPh/CdSe@TiO2 for simultaneous photocatalytic CO2and proton reduction

An assembled ternary photocatalyst CoPh/CdSe@TiO2 for simultaneous photocatalytic CO2and proton reduction

Recent Developments in ZnS-Based Nanostructures Photocatalysts for Wastewater Treatment

Recent Advances and Perspectives of Core‐Shell Nanostructured Materials for Photocatalytic CO2 Reduction

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An assembled ternary photocatalyst CoPh/CdSe@TiO2 for simultaneous photocatalytic CO₂and proton reduction

An assembled ternary photocatalyst CoPh/CdSe@TiO2 for simultaneous photocatalytic CO₂and proton reduction

Recent Advances and Perspectives of Core‐Shell Nanostructured Materials for Photocatalytic CO₂ Reduction