Construction of NH2-MIL-125(Ti)/CdS Z-scheme heterojunction for efficient photocatalytic H2 evolution.
TL;DR: The detailed characterizations reveal that CdS nanoparticles are in-suit archored on NH2-MIL-125(Ti) nanoplates, which gives a positive effect regarding charge separation and will provide a new avenue to develop high-efficiency heterojunction catalyst for solar-driven energy conversions and other application.
About: This article is published in Journal of Hazardous Materials.The article was published on 2021-03-05. It has received 62 citations till now. The article focuses on the topics: Heterojunction.
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TL;DR: In this article , a review of the applications of MOFs and COFs for photocatalysis in CO2 reduction, H2 generation, and environmental pollution treatment, and elucidates the relevant photocatalytic mechanisms.
200 citations
01 Jul 2021
73 citations
TL;DR: In this article , an S vacancies 1T-WS2/CdS was designed to achieve 70.9 mmol/g/h hydrogen evolution rate accompanied with 39.1% AQY at 500 nm via coordinating the interfacial electronic engineering and photothermal effect.
Abstract: Modulation of electronic structure and facilitation of *H adsorption through defective sites is of great significance for photocatalytic hydrogen evolution. Here, we designed an S vacancies 1T-WS2/CdS to achieve 70.9 mmol/g/h hydrogen evolution rate accompanied with 39.1% AQY at 500 nm via coordinating the interfacial electronic engineering and photothermal effect. The photothermal effect induced by S vacancies 1T-WS2 effectively lowered the apparent activation energy from 15.96 kJ/mol to 10.51 kJ/mol, meanwhile, the directional migration of electrons from CdS to S vacancies accelerated by lattice heating was the main reason for boosting photocatalytic hydrogen evolution. Both the decrease of free energy of *H due to the existence of S vacancies and the enhancement of field strength caused by effective enrichment of electrons at the interface of S vacancies 1T-WS2/CdS. This work provided valuable insight into the use of non-precious metal co-catalysts for photo-thermal assisted photocatalytic hydrogen evolution.
39 citations
TL;DR: In this paper , a novel all-solidstate Z-scheme NH2-MIL-125(Ti)/Ti3C2 MXene quantum dots/ZnIn2S4 (Ti-MOF/QDs/ZIS) photocatalyst was prepared, then applied for photocatalytic antibiotic (tetracycline and sulfamethazine) degradation and hydrogen evolution under visible light.
35 citations
01 Jan 2022
TL;DR: The construction of a tandem S-scheme heterojunction forms a built-in electric field at the interface between the catalysts and increases the photocatalytic reduction potential as mentioned in this paper .
Abstract: The construction of a tandem S-scheme heterojunction forms a built-in electric field at the interface between the catalysts and increases the photocatalytic reduction potential.
33 citations
References
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TL;DR: It is shown that an abundant material, polymeric carbon nitride, can produce hydrogen from water under visible-light irradiation in the presence of a sacrificial donor.
Abstract: The production of hydrogen from water using a catalyst and solar energy is an ideal future energy source, independent of fossil reserves. For an economical use of water and solar energy, catalysts that are sufficiently efficient, stable, inexpensive and capable of harvesting light are required. Here, we show that an abundant material, polymeric carbon nitride, can produce hydrogen from water under visible-light irradiation in the presence of a sacrificial donor. Contrary to other conducting polymer semiconductors, carbon nitride is chemically and thermally stable and does not rely on complicated device manufacturing. The results represent an important first step towards photosynthesis in general where artificial conjugated polymer semiconductors can be used as energy transducers.
9,751 citations
TL;DR: In this article, a review summarizes the basics of overall water splitting via both one-step excitation and Z-scheme processes, with a focus on standard methods of determining photocatalytic performance.
Abstract: Overall water splitting based on particulate photocatalysts is an easily constructed and cost-effective technology for the conversion of abundant solar energy into clean and renewable hydrogen energy on a large scale. This promising technology can be achieved in a one-step excitation system using a single photocatalyst or via a Z-scheme process based on a pair of photocatalysts. Ideally, such photocatalysis will proceed with charge separation and transport unaffected by recombination and trapping, and surface catalytic processes will not involve undesirable reactions. This review summarizes the basics of overall water splitting via both one-step excitation and Z-scheme processes, with a focus on standard methods of determining photocatalytic performance. Various surface engineering strategies applied to photocatalysts, such as cocatalyst loading, surface morphology control, surface modification and surface phase junctions, have been developed to allow efficient one-step excitation overall water splitting. In addition, numerous visible-light-responsive photocatalysts have been successfully utilized as H2-evolution or O2-evolution photocatalysts in Z-scheme overall water splitting. Prototype particulate immobilization systems with photocatalytic performances comparable to or drastically higher than those of particle suspension systems suggest the exciting possibility of the large-scale production of low-cost renewable solar hydrogen.
1,460 citations
TL;DR: The formation of semiconductor composites comprising multicomponent or multiphase heterojunctions is a very effective strategy to design highly active photocatalyst systems as discussed by the authors, and a review summarizes the recent strategies to develop such composites, and highlights the most recent developments in the literature.
Abstract: The formation of semiconductor composites comprising multicomponent or multiphase heterojunctions is a very effective strategy to design highly active photocatalyst systems. This review summarizes the recent strategies to develop such composites, and highlights the most recent developments in the fi eld. After a general introduction into the different strategies to improve photocatalytic activity through formation of heterojunctions, the three different types of heterojunctions are introduced in detail, followed by a historical introduction to semiconductor heterojunction systems and a thorough literature overview. Special chapters describe the highly-investigated carbon nitride heterojunctions as well as very recent developments in terms of multiphase heterojunction formation, including the latest insights into the anatase-rutile system. When carefully designed, semiconductor composites comprising two or three different materials or phases very effectively facilitate charge separation and charge carrier transfer, substantially improving photocatalytic and photoelectrochemical effi ciency.
1,241 citations
TL;DR: This review highlights the research aimed at the implementation of MOFs as an integral part of solid-state microelectronics and discusses the fundamental and applied aspects of this two-pronged approach.
Abstract: Metal-organic frameworks (MOFs) are typically highlighted for their potential application in gas storage, separations and catalysis. In contrast, the unique prospects these porous and crystalline materials offer for application in electronic devices, although actively developed, are often underexposed. This review highlights the research aimed at the implementation of MOFs as an integral part of solid-state microelectronics. Manufacturing these devices will critically depend on the compatibility of MOFs with existing fabrication protocols and predominant standards. Therefore, it is important to focus in parallel on a fundamental understanding of the distinguishing properties of MOFs and eliminating fabrication-related obstacles for integration. The latter implies a shift from the microcrystalline powder synthesis in chemistry labs, towards film deposition and processing in a cleanroom environment. Both the fundamental and applied aspects of this two-pronged approach are discussed. Critical directions for future research are proposed in an updated high-level roadmap to stimulate the next steps towards MOF-based microelectronics within the community.
908 citations
TL;DR: An overview of recent developments achieved in the fabrication of porous MOF-derived nanostructures including carbons, metal oxides, metal chalcogenides (metal sulfides and selenides), metal carbide, metal phosphides and their composites are provided.
Abstract: The emergence of metal-organic frameworks (MOFs) as a new class of crystalline porous materials is attracting considerable attention in many fields such as catalysis, energy storage and conversion, sensors, and environmental remediation due to their controllable composition, structure and pore size. MOFs are versatile precursors for the preparation of various forms of nanomaterials as well as new multifunctional nanocomposites/hybrids, which exhibit superior functional properties compared to the individual components assembling the composites. This review provides an overview of recent developments achieved in the fabrication of porous MOF-derived nanostructures including carbons, metal oxides, metal chalcogenides (metal sulfides and selenides), metal carbides, metal phosphides and their composites. Finally, the challenges and future trends and prospects associated with the development of MOF-derived nanomaterials are also examined.
710 citations