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Zhao B, Shakouri M, Feng R, Regier T, Zeng Y, Zhang Y, Zhang J, Wang L, Luo JL, Fu XZ. Crystallization Engineering of CuNi 2 S 4 Ultra-Fine Nanocrystals with Optimized Band Structures for Efficient Photocatalytic Pollutant Degradation and Hydrogen Production. SMALL METHODS 2023; 7:e2201612. [PMID: 37452235 DOI: 10.1002/smtd.202201612] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Revised: 05/26/2023] [Indexed: 07/18/2023]
Abstract
The mono-dispersed cubic siegenite CuNi2 S4 ultra-fine (≈5 nm) nanocrystals are fabricated through crystallization engineering under hot injection. The strong hydroxylation on mostly exposed CuNi2 S4 (220) surface leads to the formation of multi-valence (Cu+ , Cu2+ , Ni2+ , Ni3+ ) species with unsaturated hybridization and coordination micro-environments, which can induce rich redox reactions to optimize interfacial kinetics for the adsorbed reaction intermediates. The as-synthesized CuNi2 S4 nanocrystals with ultra-small particle size and the characteristics of being highly dispersed can increase specific surface area and hydroxylated active sites, which considerably contribute to the improvement of photocatalytic activities. Experimental and theoretical studies indicate that the CuNi2 S4 with unique surface condition can properly modulate the charge density distribution and the electronic band structure, thus achieving an optimal band gap for enhancing visible light absorption. Additionally, the strong hydroxylation on CuNi2 S4 (220) surface can not only make the photocatalytic process stable in alkaline environment but also bring about an impurity level between conduction and valence band, which facilitates the separation of photo-induced charge carriers by suppressing the rapid re-combination of exited electrons and holes. The optimization of band structure should be the intrinsic reason for the efficient photocatalytic pollutant degradation and hydrogen production under visible light illumination.
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Affiliation(s)
- Bin Zhao
- Shenzhen Key Laboratory of Energy Electrocatalytic Materials, Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen, 518060, China
| | - Mohsen Shakouri
- Canadian Light Source Inc., Saskatoon, Saskatchewan, S7N 0X4, Canada
| | - Renfei Feng
- Canadian Light Source Inc., Saskatoon, Saskatchewan, S7N 0X4, Canada
| | - Tom Regier
- Canadian Light Source Inc., Saskatoon, Saskatchewan, S7N 0X4, Canada
| | - Yuxiang Zeng
- Shenzhen Key Laboratory of Energy Electrocatalytic Materials, Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen, 518060, China
| | - Yu Zhang
- Instrumental Analysis Center of Shenzhen University (Lihu Campus), Shenzhen University, Shenzhen, Guangdong, 518055, China
| | - Jiujun Zhang
- College of Materials Science and Engineering, Fuzhou University, Fuzhou, 350108, China
- Institute for Sustainable Energy, College of Sciences, Shanghai University, Shanghai, 200444, China
| | - Lei Wang
- Shenzhen Key Laboratory of Energy Electrocatalytic Materials, Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen, 518060, China
| | - Jing-Li Luo
- Shenzhen Key Laboratory of Energy Electrocatalytic Materials, Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen, 518060, China
| | - Xian-Zhu Fu
- Shenzhen Key Laboratory of Energy Electrocatalytic Materials, Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen, 518060, China
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Recent advances and perspectives in cobalt-based heterogeneous catalysts for photocatalytic water splitting, CO2 reduction, and N2 fixation. CHINESE JOURNAL OF CATALYSIS 2022. [DOI: 10.1016/s1872-2067(21)63939-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Barman S, Singh A, Rahimi FA, Maji TK. Metal-Free Catalysis: A Redox-Active Donor-Acceptor Conjugated Microporous Polymer for Selective Visible-Light-Driven CO 2 Reduction to CH 4. J Am Chem Soc 2021; 143:16284-16292. [PMID: 34547209 DOI: 10.1021/jacs.1c07916] [Citation(s) in RCA: 80] [Impact Index Per Article: 26.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Achieving more than a two-electron photochemical CO2 reduction process using a metal-free system is quite exciting and challenging, as it needs proper channeling of electrons. In the present study, we report the rational design and synthesis of a redox-active conjugated microporous polymer (CMP), TPA-PQ, by assimilating an electron donor, tris(4-ethynylphenyl)amine (TPA), with an acceptor, phenanthraquinone (PQ). The TPA-PQ shows intramolecular charge-transfer (ICT)-assisted catalytic activity for visible-light-driven photoreduction of CO2 to CH4 (yield = 32.2 mmol g-1) with an impressive rate (2.15 mmol h-1 g-1) and high selectivity (>97%). Mechanistic analysis based on experimental results, in situ DRIFTS, and computational studies reveals that the potential of TPA-PQ for catalyzing photoreduction of CO2 to CH4 was energetically driven by photoactivated ICT upon surface adsorption of CO2, wherein adjacent keto groups of PQ unit play a pivotal role. The critical role of ICT for stimulating photocatalysis is further illustrated by synthesizing another redox-active CMP (TEB-PQ), bearing triethynylbenzene (TEB) and PQ, that shows 8-fold lesser activity for photoreduction toward CO2 to CH4 (yield = 4.4 mmol g-1) as compared to TPA-PQ. The results demonstrate a novel concept for CO2 photoreduction to CH4 using an efficient, sustainable, and recyclable metal-free robust organic photocatalyst.
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Affiliation(s)
- Soumitra Barman
- Molecular Materials Laboratory, School of Advanced Materials (SAMat), Chemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore 560064, India
| | - Ashish Singh
- Molecular Materials Laboratory, School of Advanced Materials (SAMat), Chemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore 560064, India
| | - Faruk Ahamed Rahimi
- Molecular Materials Laboratory, School of Advanced Materials (SAMat), Chemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore 560064, India
| | - Tapas Kumar Maji
- Molecular Materials Laboratory, School of Advanced Materials (SAMat), Chemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore 560064, India
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Rerbal B, Ouahrani T. Enhancement of optoelectronic properties of layered MgIn 2 Se 4 compound under uniaxial strain, an ab initio study. THE EUROPEAN PHYSICAL JOURNAL. B 2021; 94:185. [PMID: 34566489 PMCID: PMC8455306 DOI: 10.1140/epjb/s10051-021-00188-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Accepted: 08/19/2021] [Indexed: 06/13/2023]
Abstract
We argue that tuning the structure of a semiconductor offers abundant scope for use in a number of applications. In this work, by means of comprehensive density functional theory computations, we demonstrated that layered MgIn 2 Se 4 could be a promising candidate for future electronic and optoelectronic technologies. To do this task, we have applied a uniaxial strain in the z-direction. The results show that MgIn 2 Se 4 can support only a - 2.5 % of deformation without losing its dynamical stability. However, we showed that the effect of strain strongly affects the bonding pattern, which tends to increase the bandgap value. Both the charge density and noncovalent interactions were analyzed to understand this behavior. In addition, we saw that the application of non-hydrostatic pressure also enhanced the photocatalytic/optoelectronic performance of the investigated material, offering useful insights into layered MgIn 2 Se 4 for future development in this area.
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Affiliation(s)
- Benali Rerbal
- Laboratory of Materials Discovery, Unit of Research Materials and Renewable Energies, LEPM-URMER, University of Tlemcen, Tlemcen, Algeria
| | - Tarik Ouahrani
- Laboratoire de Physique Théorique, Université de Tlemcen, 13000 Tlemcen, Algeria
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Shit SC, Shown I, Paul R, Chen KH, Mondal J, Chen LC. Integrated nano-architectured photocatalysts for photochemical CO 2 reduction. NANOSCALE 2020; 12:23301-23332. [PMID: 33107552 DOI: 10.1039/d0nr05884j] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Recent advances in nanotechnology, especially the development of integrated nanostructured materials, have offered unprecedented opportunities for photocatalytic CO2 reduction. Compared to bulk semiconductor photocatalysts, most of these nanostructured photocatalysts offer at least one advantage in areas such as photogenerated carrier kinetics, light absorption, and active surface area, supporting improved photochemical reaction efficiencies. In this review, we briefly cover the cutting-edge research activities in the area of integrated nanostructured catalysts for photochemical CO2 reduction, including aqueous and gas-phase reactions. Primarily explored are the basic principles of tailor-made nanostructured composite photocatalysts and how nanostructuring influences photochemical performance. Specifically, we summarize the recent developments related to integrated nanostructured materials for photocatalytic CO2 reduction, mainly in the following five categories: carbon-based nano-architectures, metal-organic frameworks, covalent-organic frameworks, conjugated porous polymers, and layered double hydroxide-based inorganic hybrids. Besides the technical aspects of nanostructure-enhanced catalytic performance in photochemical CO2 reduction, some future research trends and promising strategies are addressed.
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Affiliation(s)
- Subhash Chandra Shit
- Catalysis & Fine Chemicals Division, CSIR-Indian Institute of Chemical Technology, Uppal Road, Hyderabad 500007, India.
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Yu L, Peel GK, Cheema FH, Lawrence WS, Bukreyeva N, Jinks CW, Peel JE, Peterson JW, Paessler S, Hourani M, Ren Z. Catching and killing of airborne SARS-CoV-2 to control spread of COVID-19 by a heated air disinfection system. MATERIALS TODAY PHYSICS 2020; 15:100249. [PMID: 34173438 DOI: 10.1016/j.mtphys.2020.100279] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Accepted: 06/28/2020] [Indexed: 05/28/2023]
Abstract
Airborne transmission of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) via air-conditioning systems poses a significant threat for the continued escalation of the current coronavirus disease (COVID-19) pandemic. Considering that SARS-CoV-2 cannot tolerate temperatures above 70 °C, here we designed and fabricated efficient filters based on heated nickel (Ni) foam to catch and kill SARS-CoV-2. Virus test results revealed that 99.8% of the aerosolized SARS-CoV-2 was caught and killed by a single pass through a novel Ni-foam-based filter when heated up to 200 °C. In addition, the same filter was also used to catch and kill 99.9% of Bacillus anthracis, an airborne spore. This study paves the way for preventing transmission of SARS-CoV-2 and other highly infectious airborne agents in closed environments.
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Affiliation(s)
- L Yu
- Department of Physics and Texas Center for Superconductivity at the University of Houston (TcSUH), University of Houston, Houston, TX 77204, USA
| | - G K Peel
- Medistar Corporation, 7670 Woodway, Suite 160, Houston, TX 77063, USA
| | - F H Cheema
- Department of Biomedical & Clinical Sciences, University of Houston College of Medicine, Houston, TX 77204, USA
| | - W S Lawrence
- Aerobiology Division, Department of Microbiology & Immunology, University of Texas Medical Branch, Galveston, TX 77555, USA
| | - N Bukreyeva
- Preclinical Studies Core, Galveston National Laboratory, University of Texas Medical Branch, Galveston, TX 77550, USA
| | - C W Jinks
- Medistar Corporation, 7670 Woodway, Suite 160, Houston, TX 77063, USA
| | - J E Peel
- Aerobiology Division, Department of Microbiology & Immunology, University of Texas Medical Branch, Galveston, TX 77555, USA
| | - J W Peterson
- Aerobiology Division, Department of Microbiology & Immunology, University of Texas Medical Branch, Galveston, TX 77555, USA
| | - S Paessler
- Preclinical Studies Core, Galveston National Laboratory, University of Texas Medical Branch, Galveston, TX 77550, USA
| | - M Hourani
- Medistar Corporation, 7670 Woodway, Suite 160, Houston, TX 77063, USA
| | - Z Ren
- Department of Physics and Texas Center for Superconductivity at the University of Houston (TcSUH), University of Houston, Houston, TX 77204, USA
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