Solar-driven methanogenesis with ultrahigh selectivity by turning down H2 production at biotic-abiotic interface

Nature Communications, Journal Year: 2022, Volume and Issue: 13(1)

Published: Nov. 3, 2022

Integration of methanogens with semiconductors is an effective approach to sustainable solar-driven methanogenesis. However, the H2 production rate by largely exceeds that methanogen metabolism, resulting in abundant as side product. Here, we report binary metallic active sites (namely, NiCu alloys) are incorporated into interface between CdS and Methanosarcina barkeri. The self-assembled barkeri-NiCu@CdS exhibits nearly 100% CH4 selectivity a quantum yield 12.41 ± 0.16% under light illumination, which not only reported biotic-abiotic hybrid systems but also superior most photocatalytic systems. Further investigation reveal Ni-Cu-Cu hollow alloys can directly supply hydrogen atoms electrons through photocatalysis barkeri for methanogenesis via both extracellular intracellular cycles, effectively turning down production. This work provides important insights interface, offers avenue engineering process.

Language: Английский

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Emerging high-ammonia‑nitrogen wastewater remediation by biological treatment and photocatalysis techniques

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 875, P. 162603 - 162603

Published: March 3, 2023

Language: Английский

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Photocatalytic material–microorganism hybrid systems in water decontamination

Trends in biotechnology, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 1, 2024

Language: Английский

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Metal‐Free Semiconductor‐Based Bio‐Nano Hybrids for Sustainable CO₂‐to‐CH₄Conversion with High Quantum Yield

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 61(35)

Published: June 17, 2022

Abstract Bio‐nano hybrids with methanogens and nano‐semiconductors provide an innovative strategy for solar‐driven CO 2 ‐to‐CH 4 conversion; however, the efficiency mismatch between electron production utilisation results in low quantum yield CH selectivity. Herein, we report integration of metal‐free polymeric carbon nitrides (CN x ) decorated cyanamide (NCN) groups Methanosarcina barkeri ( M. b ). The self‐assembled ‐ NCN CN exhibited a 50.3 % 92.3 selectivity under illumination, which outperforms other reported bio‐nano hybrid systems photocatalytic reduction. This excellent performance was attributed to distinct capacitance conductive effects , promoted storage redistribution at biotic–abiotic interface alleviate recombination losses side reaction. study provides new design guidelines sustainable reduction into fuels.

Language: Английский

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Research progress and prospect of low-carbon biological technology for nitrate removal in wastewater treatment

Frontiers of Environmental Science & Engineering, Journal Year: 2024, Volume and Issue: 18(7)

Published: March 25, 2024

Abstract Wastewater treatment plants are the major energy consumers and significant sources of greenhouse gas emissions, among which biological nitrogen removal wastewater is an important contributor to carbon emissions. However, traditional heterotrophic denitrification still has problems excessive residual sludge requirement external sources. Consequently, development innovative low-carbon nitrate technologies necessary. This review outlines key roles sulfur autotrophic hydrogen in treatment. The discovered nitrate/nitrite dependent anaerobic methane oxidation enables sustainable emission reduction by utilizing available situ . Photosynthetic microorganisms exhibited a promising potential achieve carbon-negative removal. Specifically, algal-bacterial symbiosis system photogranules offer effective prospective options for Then, emerging technology photoelectrotrophic underlying photoelectron transfer mechanisms discussed. Finally, we summarize prospect these technologies, highlighting that solar-driven area future guiding significance design systems.

Language: Английский

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Harnessing microbes to pioneer environmental biophotoelectrochemistry

Trends in biotechnology, Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 1, 2024

Language: Английский

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Novel Photoelectron-Assisted Microbial Reduction of Arsenate Driven by Photosensitive Dissolved Organic Matter in Mine Stream Sediments

Environmental Science & Technology, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 11, 2024

The microbial reduction of arsenate (As(V)) significantly contributes to arsenic migration in mine stream sediment, primarily driven by heterotrophic microorganisms using dissolved organic matter (DOM) as a carbon source. This study reveals novel pathway sediments that photosensitive DOM generates photoelectrons stimulate diverse nonphototrophic reduce As(V). photoelectrophic As(V) (PEAsR) was investigated microcosm incubation, which showed the transfer from indigenous sediment microorganisms, thereby leading 50% higher rate abundance two marker genes for reduction,

Language: Английский

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Anthraquinones-based photocatalysis: A comprehensive review

Environmental Science and Ecotechnology, Journal Year: 2024, Volume and Issue: 22, P. 100449 - 100449

Published: July 5, 2024

In recent years, there has been significant interest in photocatalytic technologies utilizing semiconductors and photosensitizers responsive to solar light, owing their potential for energy environmental applications. Current efforts are focused on enhancing existing photocatalysts developing new ones tailored uses. Anthraquinones (AQs) serve as redox-active electron transfer mediators photochemically active organic photosensitizers, effectively addressing common issues such low light utilization carrier separation efficiency found conventional semiconductors. AQs offer advantages abundant raw materials, controlled preparation, excellent capabilities, photosensitivity, with applications spanning the energy, medical, sectors. Despite utility, comprehensive reviews AQs-based systems contexts lacking. this review, we thoroughly describe photochemical properties of photocatalysis, particularly key challenges like clean production, antibacterial action, pollutant degradation. However, face limitations practical due electrical conductivity solubility-related secondary contamination. To mitigate these issues, design synthesis graphene-immobilized highlighted a solution enhance Additionally, future research directions proposed deepen understanding AQs' theoretical mechanisms provide wastewater treatment. This review aims facilitate mechanistic studies improve technologies.

Language: Английский

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Existence of chloride ions in high salinity wastewater accelerates the removal of micropollutants over light-driven catalysts

Applied Catalysis B Environment and Energy, Journal Year: 2023, Volume and Issue: 334, P. 122823 - 122823

Published: April 28, 2023

Language: Английский

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Mechanisms of extracellular photoelectron uptake by a Thiobacillus denitrificans-cadmium sulfide biosemiconductor system

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 468, P. 143667 - 143667

Published: May 25, 2023

Language: Английский

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