1
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Du T, Chao Y, Miao Z, Song W, Zhang Y, Meng C. Highly efficient photocatalyst fabricated from the recycling of heavy metal ions in wastewater for dye degradation. CHEMOSPHERE 2024; 362:142612. [PMID: 38880261 DOI: 10.1016/j.chemosphere.2024.142612] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2024] [Revised: 06/12/2024] [Accepted: 06/13/2024] [Indexed: 06/18/2024]
Abstract
Water pollution and energy crisis are becoming global and strategic issues that people are closely concerned about. Green and energy-saving photocatalytic technology is developing rapidly in solving global energy crises and environmental pollution problems. Therefore, we propose the "kill two birds with one stone" strategy to design efficient photocatalysts for dye wastewater treatment by utilizing heavy metal ions in wastewater. The adsorption properties of Mordenite (MOR) were utilized to removal heavy metal ions (Cd2+ and Zn2+) from waste water, and the adsorbed heavy metal ions were dried and sulfurized to obtain CdS/ZnS/MOR(ZnCdM). Then, g-C3N4 was ultrasonically dispersed and composited with ZnCdM by self-assembly, 25 wt% ZnCdCM photocatalytic material was obtained with a degradation rate of 99.8% in 1.5 h for Rhodamine B(RhB). It was found that MOR can provid adequate support for active substances, and the surface of MOR with smaller sizes of CdS nanoparticles, ZnS nanoparticles and g-C3N4 nanosheets, which increased the specific surface area of the materials and improved the reactivity. The porous structure of MOR is favorable for the enrichment of RhB, and the electric field effect of MOR leads to the decrease of the photogenerated carrier complex rate in the semiconductor, which increases the catalytic efficiency. In addition, the double Z charge transfer mechanism formed by CdS, ZnS, g-C3N4 is favorable for separating photogenerated carriers. These synergistic effects improved the photocatalytic efficiency. This strategy will be a green and promising solution to water pollution and energy crisis.
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Affiliation(s)
- Teng Du
- Xi'an Key Laboratory of Advanced Photo-Electronics Materials and Energy Conversion Device, Technological Institute of Materials & Energy Science (TIMES), Xijing University, Xi'an, 710123, PR China
| | - Yue Chao
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian, 116024, PR China
| | - Zongcheng Miao
- Xi'an Key Laboratory of Advanced Photo-Electronics Materials and Energy Conversion Device, Technological Institute of Materials & Energy Science (TIMES), Xijing University, Xi'an, 710123, PR China; School of Artificial Intelligence, Optics and Electronics (iOPEN), Northwestern Polytechnical University, Xi'an, 710072, Shaanxi, PR China.
| | - Wenqi Song
- Xi'an Key Laboratory of Advanced Photo-Electronics Materials and Energy Conversion Device, Technological Institute of Materials & Energy Science (TIMES), Xijing University, Xi'an, 710123, PR China
| | - Yifu Zhang
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian, 116024, PR China
| | - Changgong Meng
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian, 116024, PR China.
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2
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Liu D, Hazra A, Liu X, Maity R, Tan T, Luo L. CdS Quantum Dot Gels as a Direct Hydrogen Atom Transfer Photocatalyst for C-H Activation. Angew Chem Int Ed Engl 2024:e202403186. [PMID: 38900647 DOI: 10.1002/anie.202403186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2024] [Revised: 05/13/2024] [Accepted: 06/19/2024] [Indexed: 06/22/2024]
Abstract
Here, we report CdS quantum dot (QD) gels, a three-dimensional network of interconnected CdS QDs, as a new type of direct hydrogen atom transfer (d-HAT) photocatalyst for C-H activation. We discovered that the photoexcited CdS QD gel could generate various neutral radicals, including α-amido, heterocyclic, acyl, and benzylic radicals, from their corresponding stable molecular substrates, including amides, thio/ethers, aldehydes, and benzylic compounds. Its C-H activation ability imparts a broad substrate and reaction scope. The mechanistic study reveals that this reactivity is intrinsic to CdS materials, and the neutral radical generation did not proceed via the conventional sequential electron transfer and proton transfer pathway. Instead, the C-H bonds are activated by the photoexcited CdS QD gel via a d-HAT mechanism. This d-HAT mechanism is supported by the linear correlation between the logarithm of the C-H bond activation rate constant and the C-H bond dissociation energy (BDE) with a Brønsted slope α=0.5. Our findings expand the currently limited direct hydrogen atom transfer photocatalysis toolbox and provide new possibilities for photocatalytic C-H activation.
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Affiliation(s)
- Daohua Liu
- Department of Chemistry, Wayne State University, 5101 Cass Ave, Detroit, MI 48202
| | - Atanu Hazra
- Department of Chemistry, Wayne State University, 5101 Cass Ave, Detroit, MI 48202
| | - Xiaolong Liu
- Laboratory of Theoretical and Computational Nanoscience, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Chinese Academy of Sciences, Beijing, 100190, China
| | - Rajendra Maity
- Department of Chemistry, Wayne State University, 5101 Cass Ave, Detroit, MI 48202
| | - Ting Tan
- Laboratory of Theoretical and Computational Nanoscience, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Chinese Academy of Sciences, Beijing, 100190, China
| | - Long Luo
- Department of Chemistry, Wayne State University, 5101 Cass Ave, Detroit, MI 48202
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Gnanasekaran L, Ramalingam G, Suresh R, Nangan S, Zielińska-Jurek A, Chen WH, Soto-Moscoso M. Coastal aquatic pollutants degradation using ZnCo 2O 4 nanorods. ENVIRONMENTAL RESEARCH 2024; 258:119441. [PMID: 38901813 DOI: 10.1016/j.envres.2024.119441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 06/14/2024] [Accepted: 06/17/2024] [Indexed: 06/22/2024]
Abstract
Water pollution has caused problems in coastal areas, rivers, lakes, and other important water sources around the world as a result of inappropriate waste management. Meanwhile, these pollutants are harmful to humans and aquatic life. Textile dye effluent methyl orange (MO) was used in this work for dye degradation studies employing nanocomposites. As a result, the importance of synthesizing pure ZnO and Co3O4 nanoparticles with composites of ZnCo2O4 (zinc cobaltite) nanorods in three various proportions (90:10, 75:25, and 50:50) is emphasized in this study. Many advanced approaches were used to assess the various features of these materials, including size and shape. Fourier transform infrared (FT-IR) spectroscopy was used to determine the vibrational modes of the materials. The absorption measurements were then carried out using UV-vis spectroscopic techniques, and the photocatalytic breakdown of MO was done under visible light irradiation. The findings revealed that pure materials were inadequate for visible light activity, resulting in decreased degradation efficiencies. Spinel cobaltite structures have potential degradation efficiency under visible light, while ZnCo2O4 (50:50) catalyst has superior degradation efficiency of 59.8% over MO. The crystallite size, morphology, functional group, absorption wavelength, and band gap all play important roles in enhancing the material's photocatalytic activity under visible light. Meanwhile, ZnCo2O4 spinel structures are crucial for increasing charge carriers and reducing electron-hole recombination. As a result, zinc cobaltite minerals are widely used in industrial dye degradation applications.
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Affiliation(s)
| | - Gomathi Ramalingam
- Department of Civil Engineering, KPR Institute of Engineering and Technology, Coimbatore, 641407, India
| | - R Suresh
- Department of Chemistry, Karpagam Academy of Higher Education, Coimbatore - 641021, Tamil Nadu, India; Centre for Material Chemistry, Karpagam Academy of Higher Education, Coimbatore - 641021, Tamil Nadu, India
| | - Senthilkumar Nangan
- Metallurgy and Materials Science Research Institute, Chulalongkorn University, Thailand
| | - Anna Zielińska-Jurek
- Faculty of Chemistry, Department of Process Engineering and Chemical Technology, Gdansk University of Technology, Narutowicza 11/12, Gdansk PL-80233, Poland
| | - Wei-Hsin Chen
- Department of Aeronautics and Astronautics, National Cheng Kung University, Taiwan 701, Taiwan; Research Center for Smart Sustainable Circular Economy, Tunghai University, Taichung 407, Taiwan; Department of Mechanical Engineering, National Chin-Yi University of Technology, Taichung 411, Taiwan
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4
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Wu J, Shao G, Wu X, Cui S, Shen X. Ag-Incorporated Cr-Doped BaTiO 3 Aerogel toward Enhanced Photocatalytic Degradation of Methyl Orange. NANOMATERIALS (BASEL, SWITZERLAND) 2024; 14:848. [PMID: 38786804 PMCID: PMC11123771 DOI: 10.3390/nano14100848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2024] [Revised: 05/07/2024] [Accepted: 05/10/2024] [Indexed: 05/25/2024]
Abstract
A novel Cr-doped BaTiO3 aerogel was successfully synthesized using a co-gelation technique that involves two metallic alkoxides and a supercritical drying method. This freshly prepared aerogel has a high specific surface area of over 100 m2/g and exhibits improved responsiveness to the simulated sunlight spectrum. Methyl orange (MO) was chosen as the simulated pollutant, and the results reveal that the Cr-doped BaTiO3 aerogel, when modified with the noble metal silver (Ag), achieves a pollutant removal rate approximately 3.2 times higher than that of the commercially available P25, reaching up to 92% within 60 min. The excellent photocatalytic performance of the Ag-modified Cr-doped BaTiO3 aerogel can be primarily attributed to its extensive specific surface area and three-dimensional porous architecture. Furthermore, the incorporation of Ag nanoparticles effectively suppresses the recombination of photo-generated electrons and holes. Stability and reusability tests have confirmed the reliability of the Ag-modified Cr-doped BaTiO3 aerogel. Therefore, this material emerges as a highly promising candidate for the treatment of textile wastewater.
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Affiliation(s)
- Jun Wu
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing 211816, China; (J.W.); (X.W.); (S.C.)
- Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing Tech University, Nanjing 211816, China
| | - Gaofeng Shao
- School of Chemistry and Materials Science, Nanjing University of Information Science & Technology, Nanjing 210044, China
| | - Xiaodong Wu
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing 211816, China; (J.W.); (X.W.); (S.C.)
- Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing Tech University, Nanjing 211816, China
| | - Sheng Cui
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing 211816, China; (J.W.); (X.W.); (S.C.)
- Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing Tech University, Nanjing 211816, China
| | - Xiaodong Shen
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing 211816, China; (J.W.); (X.W.); (S.C.)
- Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing Tech University, Nanjing 211816, China
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Vamvasakis I, Andreou EK, Armatas GS. Mesoporous Dual-Semiconductor ZnS/CdS Nanocomposites as Efficient Visible Light Photocatalysts for Hydrogen Generation. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:2426. [PMID: 37686934 PMCID: PMC10490144 DOI: 10.3390/nano13172426] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Revised: 08/21/2023] [Accepted: 08/24/2023] [Indexed: 09/10/2023]
Abstract
The development of functional catalysts for the photogeneration of hydrogen (H2) via water-splitting is crucial in the pursuit of sustainable energy solutions. To that end, metal-sulfide semiconductors, such as CdS and ZnS, can play a significant role in the process due to their interesting optoelectronic and catalytic properties. However, inefficient charge-carrier dissociation and poor photochemical stability remain significant limitations to photocatalytic efficiency. Herein, dual-semiconductor nanocomposites of ZnS/CdS nanocrystal assemblies (NCAs) are developed as efficient visible light photocatalysts for H2 generation. The resultant materials, synthesized via a polymer-templated self-polymerization method, comprise a unique combination of ~5-7 nm-sized metal-sulfide nanoparticles that are interlinked to form a 3D open-pore structure with large internal surface area (up to 285 m2 g-1) and uniform pores (circa 6-7 nm). By adjusting the ratio of constituent nanoparticles, the optimized ZnS/CdS catalyst with 50 wt.% ZnS content demonstrates a remarkable stability and visible light H2-evolution activity (~29 mmol g-1 h-1 mass activity) with an apparent quantum yield (AQY) of 60% at 420 nm. Photocatalytic evaluation experiments combined with electrochemical and spectroscopic studies suggest that the superior photocatalytic performance of these materials stems from the accessible 3D open-pore structure and the efficient defect-mediated charge transfer mechanism at the ZnS/CdS nanointerfaces. Overall, this work provides a new perspective for designing functional and stable photocatalytic materials for sustainable H2 production.
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Affiliation(s)
- Ioannis Vamvasakis
- Department of Materials Science and Technology, University of Crete, 70013 Heraklion, Greece; (E.K.A.); (G.S.A.)
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Schlenkrich J, Lübkemann-Warwas F, Graf RT, Wesemann C, Schoske L, Rosebrock M, Hindricks KDJ, Behrens P, Bahnemann DW, Dorfs D, Bigall NC. Investigation of the Photocatalytic Hydrogen Production of Semiconductor Nanocrystal-Based Hydrogels. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2208108. [PMID: 36828791 DOI: 10.1002/smll.202208108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 02/03/2023] [Indexed: 05/25/2023]
Abstract
Destabilization of a ligand-stabilized semiconductor nanocrystal solution with an oxidizing agent can lead to a macroscopic highly porous self-supporting nanocrystal network entitled hydrogel, with good accessibility to the surface. The previously reported charge carrier delocalization beyond a single nanocrystal building block in such gels can extend the charge carrier mobility and make a photocatalytic reaction more probable. The synthesis of ligand-stabilized nanocrystals with specific physicochemical properties is possible, thanks to the advances in colloid chemistry made in the last decades. Combining the properties of these nanocrystals with the advantages of nanocrystal-based hydrogels will lead to novel materials with optimized photocatalytic properties. This work demonstrates that CdSe quantum dots, CdS nanorods, and CdSe/CdS dot-in-rod-shaped nanorods as nanocrystal-based hydrogels can exhibit a much higher hydrogen production rate compared to their ligand-stabilized nanocrystal solutions. The gel synthesis through controlled destabilization by ligand oxidation preserves the high surface-to-volume ratio, ensures the accessible surface area even in hole-trapping solutions and facilitates photocatalytic hydrogen production without a co-catalyst. Especially with such self-supporting networks of nanocrystals, the problem of colloidal (in)stability in photocatalysis is circumvented. X-ray photoelectron spectroscopy and photoelectrochemical measurements reveal the advantageous properties of the 3D networks for application in photocatalytic hydrogen production.
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Affiliation(s)
- Jakob Schlenkrich
- Leibniz University Hannover, Institute of Physical Chemistry and Electrochemistry, Callinstraße 3A, 30167, Hannover, Germany
| | - Franziska Lübkemann-Warwas
- Leibniz University Hannover, Institute of Physical Chemistry and Electrochemistry, Callinstraße 3A, 30167, Hannover, Germany
- Cluster of Excellence PhoenixD (Photonics, Optics and Engineering -Innovation Across Disciplines), Leibniz University Hannover, 30167, Hannover, Germany
| | - Rebecca T Graf
- Leibniz University Hannover, Institute of Physical Chemistry and Electrochemistry, Callinstraße 3A, 30167, Hannover, Germany
- Laboratory of Nano- and Quantum Engineering, Leibniz University Hannover, 30167, Hannover, Germany
| | - Christoph Wesemann
- Leibniz University Hannover, Institute of Physical Chemistry and Electrochemistry, Callinstraße 3A, 30167, Hannover, Germany
| | - Larissa Schoske
- Leibniz University Hannover, Institute of Physical Chemistry and Electrochemistry, Callinstraße 3A, 30167, Hannover, Germany
- Cluster of Excellence PhoenixD (Photonics, Optics and Engineering -Innovation Across Disciplines), Leibniz University Hannover, 30167, Hannover, Germany
| | - Marina Rosebrock
- Leibniz University Hannover, Institute of Physical Chemistry and Electrochemistry, Callinstraße 3A, 30167, Hannover, Germany
- Cluster of Excellence PhoenixD (Photonics, Optics and Engineering -Innovation Across Disciplines), Leibniz University Hannover, 30167, Hannover, Germany
| | - Karen D J Hindricks
- Cluster of Excellence PhoenixD (Photonics, Optics and Engineering -Innovation Across Disciplines), Leibniz University Hannover, 30167, Hannover, Germany
- Leibniz University Hannover, Institute of Inorganic Chemistry, Callinstraße 9, 30167, Hannover, Germany
| | - Peter Behrens
- Cluster of Excellence PhoenixD (Photonics, Optics and Engineering -Innovation Across Disciplines), Leibniz University Hannover, 30167, Hannover, Germany
- Laboratory of Nano- and Quantum Engineering, Leibniz University Hannover, 30167, Hannover, Germany
- Leibniz University Hannover, Institute of Inorganic Chemistry, Callinstraße 9, 30167, Hannover, Germany
| | - Detlef W Bahnemann
- Leibniz University Hannover, Institute of Technical Chemistry, Callinstraße 5, 30167, Hannover, Germany
- Laboratory "Photoactive Nanocomposite Materials", Saint-Petersburg State University, Ulyanovskaya str. 1, Saint-Petersburg, 198504, Peterhof, Russia
| | - Dirk Dorfs
- Cluster of Excellence PhoenixD (Photonics, Optics and Engineering -Innovation Across Disciplines), Leibniz University Hannover, 30167, Hannover, Germany
- Laboratory of Nano- and Quantum Engineering, Leibniz University Hannover, 30167, Hannover, Germany
| | - Nadja C Bigall
- Cluster of Excellence PhoenixD (Photonics, Optics and Engineering -Innovation Across Disciplines), Leibniz University Hannover, 30167, Hannover, Germany
- Laboratory of Nano- and Quantum Engineering, Leibniz University Hannover, 30167, Hannover, Germany
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Rosebrock M, Zámbó D, Rusch P, Graf RT, Pluta D, Borg H, Dorfs D, Bigall NC. Morphological Control Over Gel Structures of Mixed Semiconductor-Metal Nanoparticle Gel Networks with Multivalent Cations. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2206818. [PMID: 36642817 DOI: 10.1002/smll.202206818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Revised: 12/15/2022] [Indexed: 06/17/2023]
Abstract
In this work, the influence of two different types of cations on the gel formation and structure of mixed gel networks comprised of semiconductor (namely CdSe/CdS nanorods NR) and Au nanoparticles (NP) as well as on the respective monocomponent gels is investigated. Heteroassemblies built from colloidal building blocks are usually prepared by ligand removal or cross-linking, thus, both the surface chemistry and the destabilising agent play an essential role in the gelation process. Due to the diversity of the composition, morphology, and optical properties of the nanoparticles, a versatile route to fabricate functional heteroassemblies is of great demand. In the present work, the optics, morphology, and gelation mechanism of pure semiconductor and noble metal as well as their mixed nanoparticle gel networks are revealed. The influence of the gelation agents (bivalent and trivalent cations) on the structure-property correlation is elucidated by photoluminescence, X-ray photoelectron spectroscopy, and electron microscopy measurements. The selection of cations drastically influences the nano- and microstructure of the prepared gel network structures driven by the affinity of the cations to the ligands and the nanoparticle surface. This gelation technique provides a new platform to control the formation of porous assemblies based on semiconductor and metal nanoparticles.
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Affiliation(s)
- Marina Rosebrock
- Institute of Physical Chemistry and Electrochemistry, Leibniz Universität Hannover, 30167, Hanover, Germany
- Cluster of Excellence PhoenixD (Photonics, Optics and Engineering - Innovation Across Disciplines) Leibniz Universität Hannover, 30167, Hanover, Germany
| | - Dániel Zámbó
- Institute of Technical Physics and Materials Science, Centre for Energy Research, Budapest, 1121, Hungary
| | - Pascal Rusch
- Institute of Physical Chemistry and Electrochemistry, Leibniz Universität Hannover, 30167, Hanover, Germany
| | - Rebecca T Graf
- Institute of Physical Chemistry and Electrochemistry, Leibniz Universität Hannover, 30167, Hanover, Germany
- Laboratory for Nano and Quantum Engineering, Leibniz Universität Hannover, 30167, Hanover, Germany
| | - Denis Pluta
- Institute of Physical Chemistry and Electrochemistry, Leibniz Universität Hannover, 30167, Hanover, Germany
- Laboratory for Nano and Quantum Engineering, Leibniz Universität Hannover, 30167, Hanover, Germany
| | - Hadir Borg
- Institute of Physical Chemistry and Electrochemistry, Leibniz Universität Hannover, 30167, Hanover, Germany
- Cluster of Excellence PhoenixD (Photonics, Optics and Engineering - Innovation Across Disciplines) Leibniz Universität Hannover, 30167, Hanover, Germany
| | - Dirk Dorfs
- Institute of Physical Chemistry and Electrochemistry, Leibniz Universität Hannover, 30167, Hanover, Germany
- Cluster of Excellence PhoenixD (Photonics, Optics and Engineering - Innovation Across Disciplines) Leibniz Universität Hannover, 30167, Hanover, Germany
- Laboratory for Nano and Quantum Engineering, Leibniz Universität Hannover, 30167, Hanover, Germany
| | - Nadja C Bigall
- Institute of Physical Chemistry and Electrochemistry, Leibniz Universität Hannover, 30167, Hanover, Germany
- Cluster of Excellence PhoenixD (Photonics, Optics and Engineering - Innovation Across Disciplines) Leibniz Universität Hannover, 30167, Hanover, Germany
- Laboratory for Nano and Quantum Engineering, Leibniz Universität Hannover, 30167, Hanover, Germany
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8
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Photocatalytic properties of a binuclear Cd-complex to different types of harmful organic pollutants. TRANSIT METAL CHEM 2022. [DOI: 10.1007/s11243-022-00516-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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9
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Facile Synthesis of ZnSe/Co3O4 Heterostructure Nanocomposites for the Photocatalytic Degradation of Congo Red Dye. Catalysts 2022. [DOI: 10.3390/catal12101184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
In the present paper, simple hydrothermal and solid-state methods are reported for the synthesis of metal chalcogenide (ZnSe), metal oxide (Co3O4) and their nano-heterostructure (ZnSe/Co3O4 3:1, 1:1 and 1:3 ratios by weight), while their photocatalytic efficiencies are also investigated. The X-ray diffraction results corroborate the good crystallinity and purity of all synthesized products, i.e., ZnSe, Co3O4 and their nanocomposites. The scanning electron micro-images of ZnSe show a mixed morphology of nanoparticles (≈16 nm), including spherical and distorted cubes, while Co3O4 has a worm-like morphology (≈20 × 50 nm). The EDX results show that all the elements are present in accordance with their anticipated amounts in the products. The UV/visible absorption spectrum of ZnSe depicts a sharp absorption at around 480 nm, while Co3O4 demonstrates two prominent peaks, 510 nm and 684 nm. The prepared samples were employed for the photocatalytic degradation of Congo red dye and the nano-heterostructure (ZnSe/Co3O4 3:1) shows an exceptional photocatalytic degradation efficiency of 96%. This enhanced photocatalytic activity was due to the synergic effect of ZnSe and Co3O4 that reduced the electron/hole recombination and caused suitable bandgap alignment.
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Anwar K, Naqvi FK, Beg S, Haneef S. Photocatalytic degradation of MB dye and paracetamol drug, via hydrothermally synthesised Praseodymium doped Bi4V2O11 nanoparticles. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.134183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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11
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Du T, Zhang Y, Chao Y, An Y, Meng C. In situ growth of hierarchical phase junction CdS on a H-mordenite zeolite for enhanced photocatalytic properties. Dalton Trans 2022; 51:12975-12985. [PMID: 35959793 DOI: 10.1039/d2dt01549h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A kind of cadmium sulfide (CdS) nanocomposite with different crystalline phases was grown on the surface of H-mordenite zeolite (HMOR) by a chemical liquid-phase co-precipitation method. In this work, 2 wt% CdS@HMOR photocatalytic material with the coexistence phase (hexagonal phase and cubic phase) of cadmium sulfide was grown on the surface of HMOR by controlling the reaction temperature and ammonia concentration. Photocatalytic degradation of methylene blue (MB) was used as an index to detect the photocatalytic performance of materials. The results indicated that the photocatalytic degradation efficiency of the system with HMOR was significantly improved in comparison to that without HMOR (CdS, 40.34%, 0.2578 h-1). It was found that 2 wt% CdS@HMOR had the best photocatalytic activity. The degradation rate of MB was 84.15% in 2 h, and the degradation rate constant was 0.8884 h-1. When 1.5 ml H2O2 was introduced into the system, the degradation rate of MB was increased to 98.98%, and the degradation rate constant was 1.9976 h-1. SEM, HRTEM, PL, EIS and photocurrent showed that the cubic and hexagonal phases of CdS were in contact with each other on the HMOR surface, forming a good electron transport. By XRD, XPS and SEM tests, the results of materials after four cycles of reactions showed that the structure of the 2 wt% CdS@HMOR was still stable. Therefore, HMOR may provide a good support for CdS, and the synergistic effect between them is beneficial for the occurrence of photocatalytic reactions. HMOR can act as an electron receptor to inhibit the recombination of carriers. The homo-junction between different phases of CdS on the surface of HMOR is beneficial to the separation of photo-induced carriers. These results indicate that the construction of phase heterojunctions on zeolites and the synergism among them are a method for improving the photocatalytic activity.
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Affiliation(s)
- Teng Du
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian, 116024, PR China.
| | - Yifu Zhang
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian, 116024, PR China.
| | - Yue Chao
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian, 116024, PR China.
| | - Yonglin An
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian, 116024, PR China.
| | - Changgong Meng
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian, 116024, PR China.
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12
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Soni V, Singh AN, Singh P, Gupta A. Photocatalytic dye-degradation activity of nano-crystalline Ti 1-x M x O 2-δ (M =Ag, Pd, Fe, Ni and x = 0, 0.01) for water pollution abatement. RSC Adv 2022; 12:18794-18805. [PMID: 35873333 PMCID: PMC9244643 DOI: 10.1039/d2ra02847f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Accepted: 05/30/2022] [Indexed: 11/29/2022] Open
Abstract
Nanocrystalline metal-ion (M = Fe, Ni, Ag, and Pd) doped and undoped anatase-TiO2 powders were prepared using a solution combustion method. The photocatalytic degradation of different dyes such as methylene blue (MB), rhodamine B (RB), rhodamine B base (RBB), and thionine acetate (TA) was investigated under UV exposure. The degradation rate of the dyes were found to be better in the case of Ag+ and Pd2+ doped TiO2, whereas Fe3+ and Ni2+ doped TiO2 showed lower photocatalytic activity compared to undoped TiO2 nanoparticles. Combustion synthesized catalysts exhibited much better activity compared to the commercial Degussa P25 (75% anatase + 25% rutile) TiO2 photocatalyst. The intermediate states created in the band gap of the TiO2 photocatalyst due to doping of first row transition metal ions (such as Fe3+ and Ni2+) into the TiO2 lattice act as recombination centres and the electrons present in the d-orbital quench the photogenerated holes by indirect recombination, hence increasing e−–h+ recombination rates. As a result, a decrease in the photocatalytic activity of TiO2 doped with first row transition metal ions is observed. However, in the case of noble metal ions (such as Ag+ and Pd2+) in TiO2, photoreduction of Ag+ and Pd2+ ions occurs upon UV irradiation, hence the noble metal-ions act as electron scavengers. Consequently, the lifetime of the holes (h+) increases and hence higher photocatalytic oxidation activity of the dyes is observed. A novel strategy of electron scavenging is envisaged here to develop Ag+ and Pd2+ doped TiO2 to increase the photocatalytic oxidation of organic dyes for the development of better water pollution abatement catalysts. Redox-pair stabilization in the TiO2 lattice similar to photo-chromic glasses play a defining role in enhancing the photocatalytic activity of the catalyst and is a key finding for the development of superior photocatalysts. With the help of UV-vis and fluorescence spectroscopy, the mechanisms of the superior oxidation activity of Pd2+ and Ag+ doped TiO2 nanoparticles are explained. Redox-pair stabilization in TiO2 lattice by doping of Ag+ and Pd2+ ions play a defining role in enhancing the photocatalytic activity of the catalyst by scavenging electrons generated through UV-irradiation on the catalyst.![]()
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Affiliation(s)
- Vaishali Soni
- Department of Chemistry, Indian Institute of Technology (BHU) Varanasi-221005 India +91 6390363140
| | - Abhay Narayan Singh
- School of Materials Science and Technology, Indian Institute of Technology (BHU) Varanasi-221005 India
| | - Preetam Singh
- Department of Ceramic Engineering, Indian Institute of Technology (BHU) Varanasi-221005 India
| | - Asha Gupta
- Department of Chemistry, Indian Institute of Technology (BHU) Varanasi-221005 India +91 6390363140
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13
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Rusch P, Lübkemann F, Borg H, Eckert JG, Dorfs D, Bigall NC. Influencing the coupling between network building blocks in CdSe/CdS dot/rod aerogels by partial cation exchange. J Chem Phys 2022; 156:234701. [PMID: 35732518 DOI: 10.1063/5.0093761] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
The assembly of CdSe/CdS dot/rod nanocrystals (NCs) with variable length of ZnS tips into aerogel networks is presented. To this end, a partial region selective cation exchange procedure is performed replacing Cd by Zn starting at the NC tip. The produced aerogel networks are investigated structurally and optically. The networks of tip-to-tip connected NCs have an intricate band structure with holes confined to the CdSe cores while electrons are delocalized within the CdS also within connected building blocks. However, the ZnS tips act as a barrier of variable length and strength between the NC building blocks partly confining the electrons. This results in NC based aerogel networks with tunable strength of coupling between building blocks.
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Affiliation(s)
- Pascal Rusch
- Institute of Physical Chemistry and Electrochemistry, Leibniz Universität Hannover, Callinstraße 3A, 30167 Hannover, Germany
| | - Franziska Lübkemann
- Institute of Physical Chemistry and Electrochemistry, Leibniz Universität Hannover, Callinstraße 3A, 30167 Hannover, Germany
| | - Hadir Borg
- Institute of Physical Chemistry and Electrochemistry, Leibniz Universität Hannover, Callinstraße 3A, 30167 Hannover, Germany
| | - J Gerrit Eckert
- Institute of Physical Chemistry and Electrochemistry, Leibniz Universität Hannover, Callinstraße 3A, 30167 Hannover, Germany
| | - Dirk Dorfs
- Institute of Physical Chemistry and Electrochemistry, Leibniz Universität Hannover, Callinstraße 3A, 30167 Hannover, Germany
| | - Nadja C Bigall
- Institute of Physical Chemistry and Electrochemistry, Leibniz Universität Hannover, Callinstraße 3A, 30167 Hannover, Germany
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14
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Pratibha, Rajput JK. Synergistically Enhanced Solar‐light Driven Degradation of Hazardous Food Colorants by Ultrasonically Derived MgFe
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/S‐doped g‐C
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Nanocomposite: A Z‐Scheme System Based Heterojunction Approach. Appl Organomet Chem 2022. [DOI: 10.1002/aoc.6745] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Pratibha
- Department of Chemistry, Dr. B. R Ambedkar National Institute of Technology Jalandhar Punjab India
| | - Jaspreet Kaur Rajput
- Department of Chemistry, Dr. B. R Ambedkar National Institute of Technology Jalandhar Punjab India
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15
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Degradation of rhodamine B photocatalyzed by Eu-doped CdS nanowires illuminated by visible radiation. J INDIAN CHEM SOC 2022. [DOI: 10.1016/j.jics.2022.100349] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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16
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Gao Y, Fang X, Chen D, Ma N, Dai W. Ternary photocatalyst of ZIF-8 nanofilms coupled with AgI nanoparticles seamlessly on ZnO microrods for enhanced visible-light photocatalysis degradation. J Taiwan Inst Chem Eng 2022. [DOI: 10.1016/j.jtice.2021.11.013] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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17
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Rusch P, Pluta D, Lübkemann F, Dorfs D, Zámbó D, Bigall NC. Temperature and Composition Dependent Optical Properties of CdSe/CdS Dot/Rod-Based Aerogel Networks. Chemphyschem 2021; 23:e202100755. [PMID: 34735043 PMCID: PMC9299188 DOI: 10.1002/cphc.202100755] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Indexed: 12/04/2022]
Abstract
Employing nanocrystals (NCs) as building blocks of porous aerogel network structures allows the conversion of NC materials into macroscopic solid structures while conserving their unique nanoscopic properties. Understanding the interplay of the network formation and its influence on these properties like size‐dependent emission is a key to apply techniques for the fabrication of novel nanocrystal aerogels. In this work, CdSe/CdS dot/rod NCs possessing two different CdSe core sizes were synthesized and converted into porous aerogel network structures. Temperature‐dependent steady‐state and time‐resolved photoluminescence measurements were performed to expand the understanding of the optical and electronic properties of these network structures generated from these two different building blocks and correlate their optical with the structural properties. These investigations reveal the influence of network formation and aerogel production on the network‐forming nanocrystals. Based on the two investigated NC building blocks and their aerogel networks, mixed network structures with various ratios of the two building blocks were produced and likewise optically characterized. Since the different building blocks show diverse optical response, this technique presents a straightforward way to color‐tune the resulting networks simply by choosing the building block ratio in connection with their quantum yield.
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Affiliation(s)
- Pascal Rusch
- Institute of Physical Chemistry and Electrochemistry, Leibniz Universität Hannover, Callinstraße 3 A, 30167, Hannover, Germany.,Laboratory of Nano and Quantum Engineering, Leibniz Universität Hannover, Schneiderberg 39, 30167, Hannover, Germany
| | - Denis Pluta
- Institute of Physical Chemistry and Electrochemistry, Leibniz Universität Hannover, Callinstraße 3 A, 30167, Hannover, Germany.,Laboratory of Nano and Quantum Engineering, Leibniz Universität Hannover, Schneiderberg 39, 30167, Hannover, Germany.,Hannover School for Nanotechnology, Leibniz Universität Hannover, Schneiderberg 39, 30167, Hannover, Germany
| | - Franziska Lübkemann
- Institute of Physical Chemistry and Electrochemistry, Leibniz Universität Hannover, Callinstraße 3 A, 30167, Hannover, Germany.,Laboratory of Nano and Quantum Engineering, Leibniz Universität Hannover, Schneiderberg 39, 30167, Hannover, Germany
| | - Dirk Dorfs
- Institute of Physical Chemistry and Electrochemistry, Leibniz Universität Hannover, Callinstraße 3 A, 30167, Hannover, Germany.,Laboratory of Nano and Quantum Engineering, Leibniz Universität Hannover, Schneiderberg 39, 30167, Hannover, Germany.,Cluster of Excellence PhoenixD (Photonics, Optics and Engineering - Innovation Across Disciplines), Leibniz Universität Hannover, 30167, Hannover, Germany
| | - Dániel Zámbó
- Institute of Physical Chemistry and Electrochemistry, Leibniz Universität Hannover, Callinstraße 3 A, 30167, Hannover, Germany.,Laboratory of Nano and Quantum Engineering, Leibniz Universität Hannover, Schneiderberg 39, 30167, Hannover, Germany
| | - Nadja C Bigall
- Institute of Physical Chemistry and Electrochemistry, Leibniz Universität Hannover, Callinstraße 3 A, 30167, Hannover, Germany.,Laboratory of Nano and Quantum Engineering, Leibniz Universität Hannover, Schneiderberg 39, 30167, Hannover, Germany.,Cluster of Excellence PhoenixD (Photonics, Optics and Engineering - Innovation Across Disciplines), Leibniz Universität Hannover, 30167, Hannover, Germany
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18
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Yang Y, Yang K, Wang J, Cui D, Zhao M. Fabrication and characterization of CdS nanowires templated in tobacco mosaic virus with improved photocatalytic ability. Appl Microbiol Biotechnol 2021; 105:8255-8264. [PMID: 34599676 DOI: 10.1007/s00253-021-11596-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Revised: 09/06/2021] [Accepted: 09/11/2021] [Indexed: 11/25/2022]
Abstract
Using a virus as a template to synthesize nanomaterial is a simple, green, and controllable method to acquire unique structure nanoparticles. In this study, CdS nanowires were synthesized using the tobacco mosaic virus (TMV) as a template and for deposition in the inner center channel of TMV. TMV/CdS was successfully characterized, with the results showing a diameter of 4.0 nm, a cubic-phase composition, and strong fluorescence emission peaks, with an absorption edge of 566 nm and bandgap energy of 2.28 eV. The bandgap energy is narrower than that of template-free CdS. Furthermore, TMV/CdS exhibited an increased transient photocurrent, which was attributed to the effective separation of electron-hole pairs. The photoactivities of TMV/CdS and template-free CdS were tested; the results showed that the TMV/CdS had a better performance in methylene blue (MB) photodegradation, indicating that the photoactivity of TMV/CdS was higher than that of the template-free CdS. Further research on TMV/CdS regarding the photocatalytic mechanism showed that O2•- and •OH were the major species involved in photocatalysis, rather than holes (h+). Therefore, TMV/CdS might have applications as a novel visible-light-responsive photocatalyst. KEY POINTS: • CdS nanowires were firstly synthesized in the inner center channel of TMV • TMV/CdS presented higher photocatalytic efficiency compared with template-free CdS • The O2•- and •OH were responsible for the photocatalytic reaction of TMV/CdS.
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Affiliation(s)
- Yue Yang
- College of Life Science, Northeast Forestry University, Harbin, 150040, China
| | - Kuo Yang
- College of Life Science, Northeast Forestry University, Harbin, 150040, China
| | - Jueyu Wang
- College of Life Science, Northeast Forestry University, Harbin, 150040, China
| | - Daizong Cui
- College of Life Science, Northeast Forestry University, Harbin, 150040, China.
| | - Min Zhao
- College of Life Science, Northeast Forestry University, Harbin, 150040, China.
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19
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Feng J, Su BL, Xia H, Zhao S, Gao C, Wang L, Ogbeide O, Feng J, Hasan T. Printed aerogels: chemistry, processing, and applications. Chem Soc Rev 2021; 50:3842-3888. [PMID: 33522550 DOI: 10.1039/c9cs00757a] [Citation(s) in RCA: 65] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
As an extraordinarily lightweight and porous functional nanomaterial family, aerogels have attracted considerable interest in academia and industry in recent decades. Despite the application scopes, the modest mechanical durability of aerogels makes their processing and operation challenging, in particular, for situations demanding intricate physical structures. "Bottom-up" additive manufacturing technology has the potential to address this drawback. Indeed, since the first report of 3D printed aerogels in 2015, a new interdisciplinary research area combining aerogel and printing technology has emerged to push the boundaries of structure and performance, further broadening their application scope. This review summarizes the state-of-the-art of printed aerogels and presents a comprehensive view of their developments in the past 5 years, and highlights the key near- and mid-term challenges.
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Affiliation(s)
- Junzong Feng
- Cambridge Graphene Centre, University of Cambridge, Cambridge CB3 0FA, UK.
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20
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Wang J, Wang J. Advances on Dimensional Structure Designs and Functional Applications of Aerogels. ACTA CHIMICA SINICA 2021. [DOI: 10.6023/a20110531] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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21
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Dey PC, Das R. Enhanced photocatalytic degradation of methyl orange dye on interaction with synthesized ligand free CdS nanocrystals under visible light illumination. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 231:118122. [PMID: 32044711 DOI: 10.1016/j.saa.2020.118122] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 01/30/2020] [Accepted: 02/01/2020] [Indexed: 06/10/2023]
Abstract
Methyl orange is widely used dye in textile industry and later, it becomes the major component of industrial waste and pollutes different water body. So, its degradation is required especially in the case of drinking water. Here, chemically synthesized ligand free CdS nanocrystals have been utilized as a photocatalyst to degrade this dye in water. The mean size of the CdS nanocrystal has been found to be 7 nm approximately from TEM analysis, and SAED pattern shows that these are crystalline in nature. Further, the XRD patterns confirms the cubic structure of CdS nanoparticles and mean size calculated from XRD analysis matches well with the obtained size from TEM study. NMR study clearly verifies that CdS nanocrystals are ligand free stable nanoparticles. Due to this absence of ligand on the surface of CdS nanocrystals, a much enhanced MO degradation has been observed, as the e--h+ pair in the CdS and subsequent generation of free radicals such as hydroxyl, can efficiently oxidize the organic material MO and therefore, degrade this pollutant faster under visible light illumination. The degradation efficiency is found to be 95% after 300 min of illumination, which is much better than the other similar reports.
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Affiliation(s)
- Pijush Ch Dey
- Nano-Physics & Nanotechnology Research Lab, Dept. of Physics, Tripura University (A Central University), Suryamaninagar, Agartala, Tripura, India
| | - Ratan Das
- Nano-Physics & Nanotechnology Research Lab, Dept. of Physics, Tripura University (A Central University), Suryamaninagar, Agartala, Tripura, India.
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22
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Baskakov SA, Baskakova YV. Granulated Graphene Oxide/Titanium Dioxide Composite Aerogel as a High-Performance Photocatalyst. HIGH ENERGY CHEMISTRY 2020. [DOI: 10.1134/s0018143920020022] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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23
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Lübkemann F, Rusch P, Getschmann S, Schremmer B, Schäfer M, Schulz M, Hoppe B, Behrens P, Bigall NC, Dorfs D. Reversible cation exchange on macroscopic CdSe/CdS and CdS nanorod based gel networks. NANOSCALE 2020; 12:5038-5047. [PMID: 32067005 DOI: 10.1039/c9nr09875e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Over the past decades, cation exchange reactions applied to nanoparticles have opened up synthetic pathways to nanocrystals, which were not accessible by other means before. The limitation of cation exchange on the macroscopic scale of bulk materials is given by the limited ion diffusion within the crystal structure. Lyogels or aerogels are macroscopic, highly voluminous, porous materials composed of interconnected nanoscopic building blocks and hence represent a type of bridge between the macroscopic and the nanoscopic world. To demonstrate the feasibility of cation exchange on such macroscopic nanomaterials, the cation exchange on CdSe/CdS core/shell and CdS nanorod based lyogels to Cu2-xSe/Cu2-xS and Cu2-xS and the reversible exchange back to CdSe/CdS and CdS lyogels is presented. These copper-based lyogels can also be used as an intermediate state on the way to other metal chalcogenide-based macroscopic structures. By reversed cation exchange back to cadmium an additional proof is given, that the crystal structures remain unchanged. It is shown that cation exchange reactions can also be transferred to macroscopic objects like aerogels or lyogels. This procedure additionally allows the access of aerogels which cannot be synthesized via direct destabilization of the respective colloidal solutions.
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Affiliation(s)
- Franziska Lübkemann
- Institute of Physical Chemistry and Electrochemistry, Leibniz Universität Hannover, Callinstraße 3A, 30167 Hannover, Germany. and Laboratory of Nano and Quantum Engineering, Leibniz Universität Hannover, Schneiderberg 39, 30167 Hannover, Germany
| | - Pascal Rusch
- Institute of Physical Chemistry and Electrochemistry, Leibniz Universität Hannover, Callinstraße 3A, 30167 Hannover, Germany. and Laboratory of Nano and Quantum Engineering, Leibniz Universität Hannover, Schneiderberg 39, 30167 Hannover, Germany
| | - Sven Getschmann
- Institute of Physical Chemistry and Electrochemistry, Leibniz Universität Hannover, Callinstraße 3A, 30167 Hannover, Germany. and Laboratory of Nano and Quantum Engineering, Leibniz Universität Hannover, Schneiderberg 39, 30167 Hannover, Germany
| | - Björn Schremmer
- Institute of Physical Chemistry and Electrochemistry, Leibniz Universität Hannover, Callinstraße 3A, 30167 Hannover, Germany. and Laboratory of Nano and Quantum Engineering, Leibniz Universität Hannover, Schneiderberg 39, 30167 Hannover, Germany
| | - Malte Schäfer
- Laboratory of Nano and Quantum Engineering, Leibniz Universität Hannover, Schneiderberg 39, 30167 Hannover, Germany and Institute for Inorganic Chemistry, Leibniz Universität Hannover, Callinstraße 9, 30167 Hannover, Germany
| | - Marcel Schulz
- Laboratory of Nano and Quantum Engineering, Leibniz Universität Hannover, Schneiderberg 39, 30167 Hannover, Germany and Institute for Inorganic Chemistry, Leibniz Universität Hannover, Callinstraße 9, 30167 Hannover, Germany
| | - Bastian Hoppe
- Institute for Inorganic Chemistry, Leibniz Universität Hannover, Callinstraße 9, 30167 Hannover, Germany
| | - Peter Behrens
- Laboratory of Nano and Quantum Engineering, Leibniz Universität Hannover, Schneiderberg 39, 30167 Hannover, Germany and Institute for Inorganic Chemistry, Leibniz Universität Hannover, Callinstraße 9, 30167 Hannover, Germany and Cluster of Excellency PhoenixD (Photonics, Optics, and Engineering - Innovation Across Disciplines), Hannover, Germany
| | - Nadja C Bigall
- Institute of Physical Chemistry and Electrochemistry, Leibniz Universität Hannover, Callinstraße 3A, 30167 Hannover, Germany. and Laboratory of Nano and Quantum Engineering, Leibniz Universität Hannover, Schneiderberg 39, 30167 Hannover, Germany and Cluster of Excellency PhoenixD (Photonics, Optics, and Engineering - Innovation Across Disciplines), Hannover, Germany
| | - Dirk Dorfs
- Institute of Physical Chemistry and Electrochemistry, Leibniz Universität Hannover, Callinstraße 3A, 30167 Hannover, Germany. and Laboratory of Nano and Quantum Engineering, Leibniz Universität Hannover, Schneiderberg 39, 30167 Hannover, Germany and Cluster of Excellency PhoenixD (Photonics, Optics, and Engineering - Innovation Across Disciplines), Hannover, Germany
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Crystal Structure, Spectroscopy and Photocatalytic Properties of a Co(II) Complex Based on 5-(1,2,4-triazol-1-yl)pyridine-3-carboxylic Acid. CRYSTALS 2020. [DOI: 10.3390/cryst10020098] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
A novel cobalt(II) complex, namely [Co(tpa)2(H2O)4]·2H2O (1) (Htpa = 5-(1,2,4-triazol-1-yl)pyridine-3-carboxylic acid) has been solvothermally synthesized and structurally characterized by single-crystal X-ray diffraction. Complex 1 was further characterized by elemental analysis, FTIR spectrum, electronic spectrum, X-ray powder diffraction and thermal gravimetric analysis. Structural analysis shows that complex 1 was stabilized via π···π stacking and hydrogen bonding interactions to give a 3D supramolecular framework. Hirshfeld surface analysis showed that O···H (29.5%), H···H (23.8%), N···H (21.5%) and π···π (8.6%) intermolecular contacts are the most important interactions in the crystal of 1. In addition, the synthesized Co(II) complex showed favorable photocatalytic activity for the degradation of methyl orange (MO) under UV light at room temperature. The degradation process of MO was in accordance with the first-order reaction kinetics, and the t1/2 for the reaction is 27.3 min, and the apparent rate constant is k = 2.54 × 10−2 min−1.
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25
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Silva KL, Silmi L, Brock SL. Effect of metal ion solubility on the oxidative assembly of metal sulfide quantum dots. J Chem Phys 2019; 151:234715. [PMID: 31864264 DOI: 10.1063/1.5128932] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
The versatility of the oxidative assembly method for the creation of 2D and 3D quantum dot (QD) architectures represents both an opportunity and a challenge as a method enabling controlled placement of chemically distinct QDs in multicomponent systems. The opportunity lies in the ability to independently tune the kinetics of the different components so that they are similar (leading to well-mixed systems) or different (enabling gradient or phase-segregated composites) using a wide range of variables; the challenge lies in understanding those variables and how their interplay affects the overall kinetics. Here, we show that the identity of the cation in the sulfide matrix (M = Cd2+ vs Zn2+) plays a large role in the kinetics of assembly of mass spectrometry QDs, attributed to differences in solubility. Time resolved dynamic light scattering is used to monitor the hydrodynamic radius, R¯h. ZnS shows an exponential growth associated with reaction-limited cluster aggregation (RLCA), whereas CdS demonstrates a significant induction period (10-75 min) followed by a growth step that cannot be distinguished between RLCA and diffusion limited cluster aggregation. These data correlate with relative solubilities of the nanoparticles, as probed by free-cation concentration. Data also confirm prior studies showing that cubic-closest-packed (ccp) lattices are kinetically slow relative to hexagonally closest-packed (hcp); using the slope of the ln R¯h vs time plot for the rate constant, the values of 0.510 s-1 and 3.92 s-1 are obtained for ccp ZnS and hcp ZnS, respectively. Thus, both the structure and the solubility are effective levers for adjusting the relative reactivity of QDs toward oxidative assembly.
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Affiliation(s)
- Karunamuni L Silva
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, USA
| | - Leenah Silmi
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, USA
| | - Stephanie L Brock
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, USA
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Lübkemann F, Miethe JF, Steinbach F, Rusch P, Schlosser A, Zámbó D, Heinemeyer T, Natke D, Zok D, Dorfs D, Bigall NC. Patterning of Nanoparticle-Based Aerogels and Xerogels by Inkjet Printing. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2019; 15:e1902186. [PMID: 31392835 DOI: 10.1002/smll.201902186] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Revised: 06/30/2019] [Indexed: 05/27/2023]
Abstract
Nanoparticle-based voluminous 3D networks with low densities are a unique class of materials and are commonly known as aerogels. Due to the high surface-to-volume ratio, aerogels and xerogels might be suitable materials for applications in different fields, e.g. photocatalysis, catalysis, or sensing. One major difficulty in the handling of nanoparticle-based aerogels and xerogels is the defined patterning of these structures on different substrates and surfaces. The automated manufacturing of nanoparticle-based aerogel- or xerogel-coated electrodes can easily be realized via inkjet printing. The main focus of this work is the implementation of the standard nanoparticle-based gelation process in a commercial inkjet printing system. By simultaneously printing semiconductor nanoparticles and a destabilization agent, a 3D network on a conducting and transparent surface is obtained. First spectro-electrochemical measurements are recorded to investigate the charge-carrier mobility within these 3D semiconductor-based xerogel networks.
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Affiliation(s)
- Franziska Lübkemann
- Institute of Physical Chemistry and Electrochemistry, Leibniz Universität Hannover, 30167, Hannover, Germany
- Laboratory of Nano and Quantum Engineering, Leibniz Universität Hannover, 30167, Hannover, Germany
| | - Jan Frederick Miethe
- Institute of Physical Chemistry and Electrochemistry, Leibniz Universität Hannover, 30167, Hannover, Germany
- Laboratory of Nano and Quantum Engineering, Leibniz Universität Hannover, 30167, Hannover, Germany
| | - Frank Steinbach
- Institute of Physical Chemistry and Electrochemistry, Leibniz Universität Hannover, 30167, Hannover, Germany
- Laboratory of Nano and Quantum Engineering, Leibniz Universität Hannover, 30167, Hannover, Germany
| | - Pascal Rusch
- Institute of Physical Chemistry and Electrochemistry, Leibniz Universität Hannover, 30167, Hannover, Germany
- Laboratory of Nano and Quantum Engineering, Leibniz Universität Hannover, 30167, Hannover, Germany
| | - Anja Schlosser
- Institute of Physical Chemistry and Electrochemistry, Leibniz Universität Hannover, 30167, Hannover, Germany
- Laboratory of Nano and Quantum Engineering, Leibniz Universität Hannover, 30167, Hannover, Germany
| | - Dániel Zámbó
- Institute of Physical Chemistry and Electrochemistry, Leibniz Universität Hannover, 30167, Hannover, Germany
- Laboratory of Nano and Quantum Engineering, Leibniz Universität Hannover, 30167, Hannover, Germany
| | - Thea Heinemeyer
- Institute of Physical Chemistry and Electrochemistry, Leibniz Universität Hannover, 30167, Hannover, Germany
- Laboratory of Nano and Quantum Engineering, Leibniz Universität Hannover, 30167, Hannover, Germany
| | - Dominik Natke
- Institute of Physical Chemistry and Electrochemistry, Leibniz Universität Hannover, 30167, Hannover, Germany
- Laboratory of Nano and Quantum Engineering, Leibniz Universität Hannover, 30167, Hannover, Germany
| | - Dorian Zok
- Institute of Physical Chemistry and Electrochemistry, Leibniz Universität Hannover, 30167, Hannover, Germany
- Laboratory of Nano and Quantum Engineering, Leibniz Universität Hannover, 30167, Hannover, Germany
| | - Dirk Dorfs
- Institute of Physical Chemistry and Electrochemistry, Leibniz Universität Hannover, 30167, Hannover, Germany
- Laboratory of Nano and Quantum Engineering, Leibniz Universität Hannover, 30167, Hannover, Germany
| | - Nadja C Bigall
- Institute of Physical Chemistry and Electrochemistry, Leibniz Universität Hannover, 30167, Hannover, Germany
- Laboratory of Nano and Quantum Engineering, Leibniz Universität Hannover, 30167, Hannover, Germany
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Rusch P, Niemeyer F, Pluta D, Schremmer B, Lübkemann F, Rosebrock M, Schäfer M, Jahns M, Behrens P, Bigall NC. Versatile route to core-shell reinforced network nanostructures. NANOSCALE 2019; 11:15270-15278. [PMID: 31386750 DOI: 10.1039/c9nr03645h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
In this work we present the generation of new core-shell network nanostructures of macroscopic dimensionality by a two-step process analogous to the seeded-growth method in colloidal nanoparticle modification. The nanoparticle-based core network is assembled first and in a separate second step it is coated with a continuous metal oxide shell by sol-gel methods. The interparticle contact of the nanoparticles comprising the core network is kept intact throughout the process. By analyzing the local elemental distribution, the shells can be shown to be homogeneous over the macroscopic network monolith. The shell network can be used to considerably reinforce the mechanical strength of the final core-shell network structure.
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Affiliation(s)
- Pascal Rusch
- Institute of Physical Chemistry and Electrochemistry, Leibniz Universität Hannover, Callinstraße 3A, 30167 Hannover, Germany.
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28
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29
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Zhao SN, Wang G, Poelman D, Van Der Voort P. Metal Organic Frameworks Based Materials for Heterogeneous Photocatalysis. Molecules 2018; 23:molecules23112947. [PMID: 30424499 PMCID: PMC6278367 DOI: 10.3390/molecules23112947] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Revised: 11/07/2018] [Accepted: 11/09/2018] [Indexed: 11/27/2022] Open
Abstract
The increase in environmental pollution due to the excessive use of fossil fuels has prompted the development of alternative and sustainable energy sources. As an abundant and sustainable energy, solar energy represents the most attractive and promising clean energy source for replacing fossil fuels. Metal organic frameworks (MOFs) are easily constructed and can be tailored towards favorable photocatalytic properties in pollution degradation, organic transformations, CO2 reduction and water splitting. In this review, we first summarize the different roles of MOF materials in the photoredox chemical systems. Then, the typical applications of MOF materials in heterogeneous photocatalysis are discussed in detail. Finally, the challenges and opportunities in this promising field are evaluated.
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Affiliation(s)
- Shu-Na Zhao
- Department of Chemistry, Center for Ordered Materials, Organometallics and Catalysis (COMOC), Ghent University, Krijgslaan 281 (S3), 9000 Gent, Belgium.
- LumiLab, Department of Solid State Sciences, Ghent University, Krijgslaan 281 (S1), 9000 Gent, Belgium.
| | - Guangbo Wang
- Department of Chemistry, Center for Ordered Materials, Organometallics and Catalysis (COMOC), Ghent University, Krijgslaan 281 (S3), 9000 Gent, Belgium.
| | - Dirk Poelman
- LumiLab, Department of Solid State Sciences, Ghent University, Krijgslaan 281 (S1), 9000 Gent, Belgium.
| | - Pascal Van Der Voort
- Department of Chemistry, Center for Ordered Materials, Organometallics and Catalysis (COMOC), Ghent University, Krijgslaan 281 (S3), 9000 Gent, Belgium.
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Facile Synthesis of Bi2MoO6 Microspheres Decorated by CdS Nanoparticles with Efficient Photocatalytic Removal of Levfloxacin Antibiotic. Catalysts 2018. [DOI: 10.3390/catal8100477] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Developing high-efficiency and stable visible-light-driven (VLD) photocatalysts for removal of toxic antibiotics is still a huge challenge at present. Herein, a novel CdS/Bi2MoO6 heterojunction with CdS nanoparticles decorated Bi2MoO6 microspheres has been obtained by a simple solvothermal-precipitation-calcination method. 1.0CdS/Bi2MoO6 has stronger light absorption ability and highest photocatalytic activity with levofloxacin (LEV) degradation efficiency improving 6.2 or 12.6 times compared to pristine CdS or Bi2MoO6. CdS/Bi2MoO6 is very stable during cycling tests, and no appreciable activity decline and microstructural changes are observed. Results signify that the introduction of CdS could enhance the light absorption ability and dramatically boost the separation of charge carriers, leading to the excellent photocatalytic performance of the heterojunction. This work demonstrates that flower-like CdS/ Bi2MoO6 is an excellent photocatalyst for the efficient removal of the LEV antibiotic.
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31
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Berestok T, Guardia P, Portals JB, Estradé S, Llorca J, Peiró F, Cabot A, Brock SL. Surface Chemistry and Nano-/Microstructure Engineering on Photocatalytic In 2S 3 Nanocrystals. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:6470-6479. [PMID: 29747511 DOI: 10.1021/acs.langmuir.8b00406] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Colloidal nanocrystals (NCs) compete with molecular catalysts in the field of homogenous catalysis, offering easier recyclability and a number of potentially advantageous functionalities, such as tunable band gaps, plasmonic properties, or a magnetic moment. Using high-throughput printing technologies, colloidal NCs can also be supported onto substrates to produce cost-effective electronic, optoelectronic, electrocatalytic, and sensing devices. For both catalytic and technological application, NC surface chemistry and supracrystal organization are key parameters determining final performance. Here, we study the influence of the surface ligands and the NC organization on the catalytic properties of In2S3, both as a colloid and as a supported layer. As a colloid, NCs stabilized by inorganic ligands show the highest photocatalytic activities, which we associate with their large and more accessible surfaces. On the other hand, when NCs are supported on a substrate, their organization becomes an essential parameter determining performance. For instance, NC-based films produced through a gelation process provided five-fold higher photocurrent densities than those obtained from dense films produced by the direct printing of NCs.
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Affiliation(s)
- Taisiia Berestok
- Catalonia Institute for Energy Research-IREC , 08930 Sant Adrià de Besòs , Barcelona , Spain
- LENS-MIND, Departament d'Enginyeries i Electrònica i Institut de Nanociència i Nanotecnologia (In2UB) , Universitat de Barcelona , 08028 Barcelona , Spain
| | - Pablo Guardia
- Catalonia Institute for Energy Research-IREC , 08930 Sant Adrià de Besòs , Barcelona , Spain
| | - Javier Blanco Portals
- LENS-MIND, Departament d'Enginyeries i Electrònica i Institut de Nanociència i Nanotecnologia (In2UB) , Universitat de Barcelona , 08028 Barcelona , Spain
| | - Sònia Estradé
- LENS-MIND, Departament d'Enginyeries i Electrònica i Institut de Nanociència i Nanotecnologia (In2UB) , Universitat de Barcelona , 08028 Barcelona , Spain
| | - Jordi Llorca
- Institute of Energy Technologies, Department of Chemical Engineering and Barcelona Research Center in Multiscale Science and Engineering , Universitat Politècnica de Catalunya, EEBE , 08019 Barcelona , Spain
| | - Francesca Peiró
- LENS-MIND, Departament d'Enginyeries i Electrònica i Institut de Nanociència i Nanotecnologia (In2UB) , Universitat de Barcelona , 08028 Barcelona , Spain
| | - Andreu Cabot
- Catalonia Institute for Energy Research-IREC , 08930 Sant Adrià de Besòs , Barcelona , Spain
- ICREA , Pg. Lluís Companys 23 , 08010 Barcelona , Spain
| | - Stephanie L Brock
- Department of Chemistry , Wayne State University , Detroit , Michigan 48202 , United States
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Ahmad J, Majid K. Enhanced visible light driven photocatalytic activity of CdO–graphene oxide heterostructures for the degradation of organic pollutants. NEW J CHEM 2018. [DOI: 10.1039/c7nj03617e] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Synthesis of efficient CdO based photocatalysts for enhanced visible light driven photocatalytic degradation of organic pollutants mostly emphasize on (1) increase of surface area of the photocatalyst and (2) high charge separation and suppressed recombination of photogenerated electron–hole pairs.
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Affiliation(s)
- Jahangir Ahmad
- Department of Chemistry
- National Institute of Technology
- Srinagar
- India
| | - Kowsar Majid
- Department of Chemistry
- National Institute of Technology
- Srinagar
- India
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33
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Liang Q, Jin J, Liu C, Xu S, Yao C, Li Z. Fabrication of the ternary heterojunction Cd0.5Zn0.5S@UIO-66@g-C3N4 for enhanced visible-light photocatalytic hydrogen evolution and degradation of organic pollutants. Inorg Chem Front 2018. [DOI: 10.1039/c7qi00638a] [Citation(s) in RCA: 60] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
This article reports a novel ternary heterojunction Cd0.5Zn0.5S@UIO-66@g-C3N4 that exhibits enhanced photocatalytic hydrogen production and MO degradation.
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Affiliation(s)
- Qian Liang
- School of Petrochemical Engineering
- Changzhou University
- Changzhou 213164
- PR China
| | - Jie Jin
- School of Petrochemical Engineering
- Changzhou University
- Changzhou 213164
- PR China
| | - Changhai Liu
- School of Materials Science & Engineering
- Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering
- Changzhou University
- Changzhou 213164
- PR China
| | - Song Xu
- School of Petrochemical Engineering
- Changzhou University
- Changzhou 213164
- PR China
| | - Chao Yao
- School of Petrochemical Engineering
- Changzhou University
- Changzhou 213164
- PR China
| | - Zhongyu Li
- School of Petrochemical Engineering
- Changzhou University
- Changzhou 213164
- PR China
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