H2O2 generation from O2 and H2O on a near-infrared absorbing porphyrin supramolecular photocatalyst

Nature Energy, Journal Year: 2023, Volume and Issue: 8(4), P. 361 - 371

Published: March 2, 2023

Language: Английский

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Designing oxygen vacancy mediated bismuth molybdate (Bi2MoO6)/N-rich carbon nitride (C3N5) S-scheme heterojunctions for boosted photocatalytic removal of tetracycline antibiotic and Cr(VI): Intermediate toxicity and mechanism insight

Journal of Colloid and Interface Science, Journal Year: 2022, Volume and Issue: 624, P. 219 - 232

Published: May 29, 2022

Language: Английский

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W–N Bonds Precisely Boost Z-Scheme Interfacial Charge Transfer in g-C₃N₄/WO₃ Heterojunctions for Enhanced Photocatalytic H₂ Evolution

ACS Catalysis, Journal Year: 2022, Volume and Issue: 12(16), P. 9994 - 10003

Published: Aug. 2, 2022

Exploring and achieving precise electron-transfer channels in the interface of Z-scheme heterojunctions are essential have been considered as immense challenges. A strategy to precisely connect valence band (VB) site g-C3N4 (CN) with conduction (CB) WO3 through tungsten–nitrogen (W–N) bond was developed create a chemically bonded heterojunction photocatalyst. Because this reason, photogenerated electrons from CB could be accurately directly injected into VB CN, following direct charge separation pathways. The photocatalytic hydrogen production rate optimal CNWB 482 μmol h–1, 4.3 times higher than that CN/WO3 without an N–W (CNWU). also shows better evolution activity previous systems. Theoretical experimental results further confirm newly formed bonds become metallic, which act atomic-level interfacial accelerate electron transfer shorten distance, thus substantially boosting H2 generation. This work paves way design synthesize atomic precision for interesting applications future.

Language: Английский

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Operando spectroscopies unveil interfacial FeOOH induced highly reactive β-Ni(Fe)OOH for efficient oxygen evolution

Applied Catalysis B Environment and Energy, Journal Year: 2022, Volume and Issue: 318, P. 121825 - 121825

Published: Aug. 8, 2022

Language: Английский

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Deciphering the Space Charge Effect of the p–n Junction between Copper Sulfides and Molybdenum Selenides for Efficient Water Electrolysis in a Wide pH Range

ACS Nano, Journal Year: 2022, Volume and Issue: 16(9), P. 15425 - 15439

Published: Aug. 29, 2022

Space charge transfer is crucial for an efficient electrocatalytic process, especially narrow-band-gap metal sulfides/selenides. Herein, we designed and synthesized a core-shell structure which ultrathin MoSe2 nanosheet coated CuS hollow nanoboxes (CuS@MoSe2) to form open p-n junction structure. The space effect in the region will greatly improve electron mass conduction, also have abundant active interfaces. It was used as bifunctional electrocatalyst water oxidation at wide pH range. exhibits low overpotential of 49 mV HER 236 OER current density 10 mA·cm-2 acidic pH, 72 219 alkaline 62 230 under neutral conditions. experimental results functional theory calculations testify that CuS@MoSe2 has strong with synergistic effect. built-in field can boost transport during process stabilize charged center junction. This be beneficial performance. work provides understanding semiconductor heterojunction applications regulating electronic sites.

Language: Английский

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Engineering a Copper Single‐Atom Electron Bridge to Achieve Efficient Photocatalytic CO₂ Conversion

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(13)

Published: Feb. 7, 2023

Developing highly efficient and stable photocatalysts for the CO2 reduction reaction (CO2 RR) remains a great challenge. We designed Z-Scheme photocatalyst with N-Cu1 -S single-atom electron bridge (denoted as Cu-SAEB), which was used to mediate RR. The production of CO O2 over Cu-SAEB is high 236.0 120.1 μmol g-1 h-1 in absence sacrificial agents, respectively, outperforming most previously reported photocatalysts. Notably, as-designed throughout 30 cycles, totaling 300 h, owing strengthened contact interface Cu-SAEB, mediated by atomic structure. Experimental theoretical calculations indicated that SAEB greatly promoted Z-scheme interfacial charge-transport process, thus leading enhancement photocatalytic RR Cu-SAEB. This work represents promising platform development have potential conversion applications.

Language: Английский

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Metal Sulfide S‐Scheme Homojunction for Photocatalytic Selective Phenylcarbinol Oxidation

Advanced Science, Journal Year: 2024, Volume and Issue: 11(17)

Published: Feb. 28, 2024

Abstract Metal sulfide‐based homojunction photocatalysts are extensively explored with improved photocatalytic performance. However, the construction of metal S‐scheme remains a challenge. Herein, fabrication 2D CdIn 2 S 4 nanosheets coated 3D octahedra (referred to as 2D/3D n‐CIS/o‐CIS) photocatalyst is reported by simply adjustment polyvinyl pyrrolidone amount during solvothermal synthesis. The formation within n‐CIS/o‐CIS systematically investigated via series characterizations, which can generate an internal electric field facilitate separation and migration photogenerated electron‐hole pairs. composite exhibits significantly activity stability in selective oxidation phenylcarbinol (PhCH OH) benzaldehyde (PhCHO) when compared pure n‐CIS o‐CIS samples under visible light irradiation. It hoped that this work contribute novel insights into development sulfides for solar energy conversion.

Language: Английский

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Recent Advances on Single‐Atom Catalysts for CO₂ Reduction

Small Structures, Journal Year: 2022, Volume and Issue: 4(3)

Published: Oct. 27, 2022

Continuous consumption of fossil energy and excessive CO 2 emission severely restrict human society. Sustainable carbon cycle is a promising technology to simultaneously relieve greenhouse effect crisis based on electrocatalysis photocatalysis. However, the conversion efficiency confined by poor carriers utilization insufficient reactive sites. Single‐atom catalysts (SACs) display outstanding performance in effectively overcoming aforementioned problems. Herein, recent advances SACs for enhancing efficiency, selectivity, long‐range stability reduction are provided. First, characteristics have been introduced detail provide rational design relationship between structure performance, including type, structure, synthesis SACs. Then, high electrocatalytic, photocatalytic, thermocatalytic has discussed disclosing reaction mechanism, such as charge transfer, activation barriers, pathway. In particular, strategies summarized deep insight into designing developing more efficient Finally, an outlook current challenges perspectives proposed. This review aims systematic reference advanced catalytic conversion.

Language: Английский

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Zinc porphyrin/g-C3N4 S-scheme photocatalyst for efficient H2O2 production

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 467, P. 143528 - 143528

Published: May 15, 2023

Language: Английский

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Ti₃C₂T_X MXene Modified with ZnTCPP with Bacteria Capturing Capability and Enhanced Visible Light Photocatalytic Antibacterial Activity

Small, Journal Year: 2022, Volume and Issue: 18(26)

Published: June 3, 2022

Abstract Light‐assisted antibacterial therapy is a promising alternative to antibiotic due the high efficacy without bacterial resistance. Recent research has mainly focused on use of near‐infrared light irradiation kill bacteria by taking advantage synergistic effects rendered hyperthermia and radical oxygen species. However, photocatalytic excited visible more convenient practical, especially for wounds. Herein, responsive organic‐inorganic hybrid ZnTCPP/Ti 3 C 2 T X designed fabricated treat infection with efficiency 99.86% 99.92% within 10 min against Staphylococcus aureus Escherichia coli , respectively. The porphyrin‐metal complex, ZnTCPP, assembled surface Ti MXene capture electrostatically Schottky junction formed between ZnTCPP promotes utilization, accelerates charge separation, enhances mobility photogenerated charges, finally increases activity. As result excellent capturing ability effects, exposed properties in vitro vivo. Therefore, materials that have been demonstrated possess good biocompatibility enhance wound healing large potential bio‐photocatalysis, therapy, as well antibiotics‐free treatment

Language: Английский

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