1
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Gentry NE, Kurimoto A, Cui K, Cleron JL, Xiang CM, Hammes-Schiffer S, Mayer JM. Hydrogen on Colloidal Gold Nanoparticles. J Am Chem Soc 2024; 146:14505-14520. [PMID: 38743444 DOI: 10.1021/jacs.4c00507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2024]
Abstract
Colloidal gold nanoparticles (AuNPs) have myriad scientific and technological applications, but their fundamental redox chemistry is underexplored. Reported here are titration studies of oxidation and reduction reactions of aqueous AuNP colloids, which show that the AuNPs bind substantial hydrogen (electrons + protons) under mild conditions. The 5 nm AuNPs are reduced to a similar extent with reductants from borohydrides to H2 and are reoxidized back essentially to their original state by oxidants, including O2. The reactions were monitored via surface plasmon resonance (SPR) optical absorption, which was shown to be much more sensitive to surface H than to changes in solution conditions. Reductions with H2 occurred without pH changes, demonstrating that hydrogenation forms surface H rather than releasing H+. Computational studies suggested that an SPR blueshift was expected for H atom addition, while just electron addition likely would have caused a redshift. Titrations consistently showed a maximum redox change of the 5 nm NPs, independent of the reagent, corresponding to 9% of the total gold or ∼30% hydrogen surface coverage (∼370 H per AuNP). Larger AuNPs showed smaller maximum fractional surface coverages. We conclude that H binds to the edge, corner, and defect sites of the AuNPs, which explains the stoichiometric limitation and the size effect. The finding of substantial and stable hydrogen on the AuNP surface under mild reducing conditions has potential implications for various applications of AuNPs in reducing environments, from catalysis to biomedicine. This finding contrasts with the behavior of bulk gold and with the typical electron-focused perspective in this field.
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Affiliation(s)
- Noreen E Gentry
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
| | - Aiko Kurimoto
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
| | - Kai Cui
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
| | - Jamie L Cleron
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
| | - Claire M Xiang
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
| | - Sharon Hammes-Schiffer
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
| | - James M Mayer
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
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2
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Zhao J, Wang H, Cai Y, Zhao J, Gao Z, Song YY. The Challenges and Opportunities for TiO 2 Nanostructures in Gas Sensing. ACS Sens 2024; 9:1644-1655. [PMID: 38503265 DOI: 10.1021/acssensors.4c00137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/21/2024]
Abstract
Chemiresistive gas sensors based on metal oxides have been widely applied in industrial monitoring, medical diagnosis, environmental pollutant detection, and food safety. To further enhance the gas sensing performance, researchers have worked to modify the structure and function of the material so that it can adapt to different gas types and environmental conditions. Among the numerous gas-sensitive materials, n-type TiO2 semiconductors are a focus of attention for their high stability, excellent biosafety, controllable carrier concentration, and low manufacturing cost. This Perspective first introduces the sensing mechanism of TiO2 nanostructures and composite TiO2-based nanomaterials and then analyzes the relationship between their gas-sensitive properties and their structure and composition, focusing also on technical issues such as doping, heterojunctions, and functional applications. The applications and challenges of TiO2-based nanostructured gas sensors in food safety, medical diagnosis, environmental detection, and other fields are also summarized in detail. Finally, in the context of their practical application challenges, future development technologies and new sensing concepts are explored, providing new ideas and directions for the development of multifunctional intelligent gas sensors in various application fields.
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Affiliation(s)
- Jiahui Zhao
- College of Sciences, Northeastern University, Shenyang 110004, China
| | - Haiquan Wang
- College of Sciences, Northeastern University, Shenyang 110004, China
| | - Yahui Cai
- College of Sciences, Northeastern University, Shenyang 110004, China
| | - Junjin Zhao
- College of Sciences, Northeastern University, Shenyang 110004, China
| | - Zhida Gao
- College of Sciences, Northeastern University, Shenyang 110004, China
| | - Yan-Yan Song
- College of Sciences, Northeastern University, Shenyang 110004, China
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3
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Lee CW, Lee BH, Park S, Jung Y, Han J, Heo J, Lee K, Ko W, Yoo S, Bootharaju MS, Ryu J, Nam KT, Kim M, Hyeon T. Photochemical tuning of dynamic defects for high-performance atomically dispersed catalysts. NATURE MATERIALS 2024; 23:552-559. [PMID: 38316979 DOI: 10.1038/s41563-024-01799-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Accepted: 01/06/2024] [Indexed: 02/07/2024]
Abstract
Developing active and stable atomically dispersed catalysts is challenging because of weak non-specific interactions between catalytically active metal atoms and supports. Here we demonstrate a general method for synthesizing atomically dispersed catalysts via photochemical defect tuning for controlling oxygen-vacancy dynamics, which can induce specific metal-support interactions. The developed synthesis method offers metal-dynamically stabilized atomic catalysts, and it can be applied to reducible metal oxides, including TiO2, ZnO and CeO2, containing various catalytically active transition metals, including Pt, Ir and Cu. The optimized Pt-DSA/TiO2 shows unprecedentedly high photocatalytic hydrogen evolution activity, producing 164 mmol g-1 h-1 with a turnover frequency of 1.27 s-1. Furthermore, it generates 42.2 mmol gsub-1 of hydrogen via a non-recyclable-plastic-photoreforming process, achieving a total conversion of 98%; this offers a promising solution for mitigating plastic waste and simultaneously producing valuable energy sources.
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Affiliation(s)
- Chan Woo Lee
- Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul, Republic of Korea
- School of Chemical and Biological Engineering, and Institute of Chemical Processes, Seoul National University, Seoul, Republic of Korea
| | - Byoung-Hoon Lee
- Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul, Republic of Korea.
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, Republic of Korea.
| | - Sunghak Park
- Department of Materials Science and Engineering, Seoul National University, Seoul, Republic of Korea
| | - Yoon Jung
- Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul, Republic of Korea
- School of Chemical and Biological Engineering, and Institute of Chemical Processes, Seoul National University, Seoul, Republic of Korea
| | - Jaebeom Han
- Department of Applied Chemistry, Kyung Hee University, Yongin, Republic of Korea
| | - Junhyeok Heo
- Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul, Republic of Korea
- School of Chemical and Biological Engineering, and Institute of Chemical Processes, Seoul National University, Seoul, Republic of Korea
| | - Kangjae Lee
- Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul, Republic of Korea
- School of Chemical and Biological Engineering, and Institute of Chemical Processes, Seoul National University, Seoul, Republic of Korea
| | - Wonjae Ko
- Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul, Republic of Korea
- School of Chemical and Biological Engineering, and Institute of Chemical Processes, Seoul National University, Seoul, Republic of Korea
| | - Seungwoo Yoo
- Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul, Republic of Korea
- School of Chemical and Biological Engineering, and Institute of Chemical Processes, Seoul National University, Seoul, Republic of Korea
| | - Megalamane S Bootharaju
- Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul, Republic of Korea
| | - Jaeyune Ryu
- School of Chemical and Biological Engineering, and Institute of Chemical Processes, Seoul National University, Seoul, Republic of Korea
| | - Ki Tae Nam
- Department of Materials Science and Engineering, Seoul National University, Seoul, Republic of Korea
| | - Minho Kim
- Department of Applied Chemistry, Kyung Hee University, Yongin, Republic of Korea.
| | - Taeghwan Hyeon
- Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul, Republic of Korea.
- School of Chemical and Biological Engineering, and Institute of Chemical Processes, Seoul National University, Seoul, Republic of Korea.
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4
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Abstract
ConspectusAs a renewable solar energy and carbon carrier, biomass exploration has received global attention. Photocatalytic valorization of biomass into fuels and chemicals is a promising and sustainable method for future chemical production. Photocatalysis has the potential to accomplish reactions under ambient conditions due to the unique reaction mechanisms involving photoinduced charge carriers and has recently been recognized as an efficient and feasible technology for biomass conversion. Biomass is widely used as sacrificial agent to scavenge holes in photocatalytic hydrogen evolution, and the carbon is eventually degraded to CO2 with a minor amount of CO. The generation of CO instead of CO2 is more economical and promising but also a challenge under photoreforming conditions.This is a new research direction, while until now there has still been the lack of a comprehensive review article to summarize and provide prospects for this topic. This Account will highlight our contributions in the research direction of the photocatalytic reforming of biomass into syngas (CO + H2). In 2020, we first reported the photocatalytic conversion of biopolyols and sugars into syngas by employing a defect-rich Cu-TiO2 nanorod photocatalyst and found that formic acid is a key intermediate to CO. Further study revealed that a facet-dependent electron-trapping state on anatase TiO2 will affect the photocatalytic dehydration activity for formic acid intermediates by regulating the electron transfer process during the reaction, and the selective generation of FA or CO from photocatalytic biomass reforming was achieved via exposing the (100) or (101) facets, respectively. Visible light-driven syngas generation was further achieved over a CdS-based photocatalyst. Sulfate modification of CdS ([SO4]/CdS) was constructed as the proton acceptor, thus efficiently facilitating the proton-coupled electron transfer process. Besides, we put forward an oxygen-controlled strategy to increase the CO generation rate without a significant decrease in CO selectivity via controlling the O2/substrate ratio. Based on this system, a Z-scheme CdS@g-C3N4 core-shell structure and CdO-CdS semicoherent interface were created to facilitate charge transfer and enhance the O2 activation, thus increasing the CO generation rate. Moreover, we also developed a photoelectrochemical approach to separately produce CO and H2 from biomass. Nitrogen doping of a hexagonal WO3 nanowire array was used to produce the photoanode. The built-in electric field generated via nitrogen doping promoted charge transfer, hence improving the efficiency of PEC reforming of biopolyols and sugars. This Account will systematically analyze the challenges in this research direction, the reaction route in the photocatalytic biomass reforming, and the factors affecting CO selectivity and give insight into the design of efficient photocatalytic systems.
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Affiliation(s)
- Min Wang
- Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian 116024, Liaoning, China
| | - Hongru Zhou
- Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian 116024, Liaoning, China
| | - Feng Wang
- State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China
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Wang L, Ren X, Chen L, Mao H, Gao D, Zhou Y. Constructing recyclable photocatalytic BiOBr/Ag nanowires/cotton fabric for efficient dye degradation under visible light. ARAB J CHEM 2023. [DOI: 10.1016/j.arabjc.2023.104624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
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6
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Zhou H, Wang M, Kong F, Chen Z, Dou Z, Wang F. Facet-Dependent Electron Transfer Regulates Photocatalytic Valorization of Biopolyols. J Am Chem Soc 2022; 144:21224-21231. [DOI: 10.1021/jacs.2c08655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Hongru Zhou
- Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian116024, Liaoning, China
| | - Min Wang
- Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian116024, Liaoning, China
| | - Fanhao Kong
- Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian116024, Liaoning, China
| | - Zhiwei Chen
- Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian116024, Liaoning, China
| | - Zhaolin Dou
- Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian116024, Liaoning, China
| | - Feng Wang
- State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian116023, Liaoning, China
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7
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Peper JL, Gentry NE, Boudy B, Mayer JM. Aqueous TiO 2 Nanoparticles React by Proton-Coupled Electron Transfer. Inorg Chem 2021; 61:767-777. [PMID: 34967207 DOI: 10.1021/acs.inorgchem.1c03125] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Redox reactions of aqueous colloidal TiO2 4 nm nanoparticles (NPs) have been examined, including both citrate-capped and uncapped NPs (c-TiO2 and uc-TiO2). Photoreduction gave stable blue colloidal c-TiO2R NPs with 10-60 electrons per particle. Equilibration of these reduced NPs with soluble redox reagents such as methylviologen (MV2+) provided measurements of the colloid reduction potential as a function of pH. The potentials of c-TiO2 from pH 2-9 varied linearly with pH, with a slope of -60 ± 5 mV/pH. Estimates of the potential at pH 12 were consistent with extrapolating that line to high pH. The reduction potentials did not correlate with the zeta potentials (ζ) or the surface charge of the NPs across this pH range. Similar reduction potentials were observed for c- and uc-TiO2 at low pH even though they have quite different ζ potentials. These results show that the common surface-charging explanation of the pH dependence is not tenable in these systems. Oxidation of reduced c-TiO2R with the electron-transfer oxidant potassium triiodide (KI3) occurred with a significant drop in pH, showing that protons were released when the electrons were removed from the NPs. Smaller pH drops were observed for the proton-coupled electron transfer (PCET) reagents O2 (air) and 4-MeO-TEMPO (4-methoxy-2,2,6,6-tetramethylpiperine-1-oxy radical). The difference in the number of protons released with KI3 vs O2 and 4-MeO-TEMPO was roughly one proton per electron removed. Thus, the thermodynamically preferred reactivity of these colloidal TiO2 NPs is PCET over the pH 2-13 range studied. The measured redox potentials refer to the chemical process TiO2 + H+ + e- → TiO2·e-,H+; and therefore they do not correspond with an electronic energy such as a conduction band edge or flat band potential. The 1e-/1H+ stoichiometry means that the TiO2 reduction potentials correspond to a TiO2-H bond dissociation free energy (BDFE), determined to be 49 ± 2 kcal mol-1. The PCET description is consistent with the pH dependence of E(TiO2/TiO2·e-,H+), the release of protons upon oxidation, the lack of correlation with ζ potentials, the similarity of capped and uncapped NPs, and the small change in the potential and BDFE from the first to the last electron/proton pair (H atom) removed. This behavior is suggested to be the norm for redox-active oxide/water interfaces.
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Affiliation(s)
- Jennifer L Peper
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
| | - Noreen E Gentry
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
| | - Benjamin Boudy
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
| | - James M Mayer
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
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8
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Liu X, Zhou Y, Zeng D, Wang H, Qiao S, Zhang L, Wang W. Catalytic Acetalization and Hydrogenation of Furfural over the Light‐Tunable Phosphated TiO
2
Catalyst. ChemistrySelect 2021. [DOI: 10.1002/slct.202102104] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Xuechen Liu
- State Key Laboratory of High Performance Ceramics andSuperfine Microstructure Shanghai Institute of Ceramics Chinese Academy of Sciences 1295 Dingxi Road Shanghai 200050 People's Republic of China
| | - Yuanyi Zhou
- State Key Laboratory of High Performance Ceramics andSuperfine Microstructure Shanghai Institute of Ceramics Chinese Academy of Sciences 1295 Dingxi Road Shanghai 200050 People's Republic of China
- Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences 19A Yuquan Road Beijing 100049 People's Republic of China
| | - Di Zeng
- State Key Laboratory of High Performance Ceramics andSuperfine Microstructure Shanghai Institute of Ceramics Chinese Academy of Sciences 1295 Dingxi Road Shanghai 200050 People's Republic of China
- Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences 19A Yuquan Road Beijing 100049 People's Republic of China
| | - Haipeng Wang
- State Key Laboratory of High Performance Ceramics andSuperfine Microstructure Shanghai Institute of Ceramics Chinese Academy of Sciences 1295 Dingxi Road Shanghai 200050 People's Republic of China
- Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences 19A Yuquan Road Beijing 100049 People's Republic of China
| | - Simeng Qiao
- State Key Laboratory of High Performance Ceramics andSuperfine Microstructure Shanghai Institute of Ceramics Chinese Academy of Sciences 1295 Dingxi Road Shanghai 200050 People's Republic of China
| | - Ling Zhang
- State Key Laboratory of High Performance Ceramics andSuperfine Microstructure Shanghai Institute of Ceramics Chinese Academy of Sciences 1295 Dingxi Road Shanghai 200050 People's Republic of China
- Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences 19A Yuquan Road Beijing 100049 People's Republic of China
| | - Wenzhong Wang
- State Key Laboratory of High Performance Ceramics andSuperfine Microstructure Shanghai Institute of Ceramics Chinese Academy of Sciences 1295 Dingxi Road Shanghai 200050 People's Republic of China
- Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences 19A Yuquan Road Beijing 100049 People's Republic of China
- School of Chemistry and Materials Science Hangzhou Institute for Advanced Study University of Chinese Academy of Sciences 1 Sub-lane Xiangshan Hangzhou 310024 China
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9
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Peper JL, Gentry NE, Brezny AC, Field MJ, Green MT, Mayer JM. Different Kinetic Reactivity of Electrons in Distinct TiO 2 Nanoparticle Trap States. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2021; 125:680-690. [PMID: 34178203 PMCID: PMC8232823 DOI: 10.1021/acs.jpcc.0c10633] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Electrons added to TiO2 and other semiconductors often occupy trap states, whose reactivity can determine the catalytic and stoichiometric chemistry of the material. We previously showed that reduced aqueous colloidal TiO2 nanoparticles have two distinct classes of thermally-equilibrated trapped electrons, termed Red/e - and Blue/e -. Presented here are parallel optical and electron paramagnetic resonance (EPR) kinetic studies of the reactivity of these electrons with solution-based oxidants. Optical stopped-flow measurements monitoring reactions of TiO2/e - with sub-stoichiometric oxidants showed a surprising pattern: an initial fast (seconds) decrease in TiO2/e - absorbance followed by a secondary, slow (minutes) increase in the broad TiO2/e - optical feature. Analysis revealed that the fast decrease is due to the preferential oxidation of the Red/e - trap states, and the slow increase results from re-equilibration of electrons from Blue to Red states. This kinetic model was confirmed by freeze-quench EPR measurements. Quantitative analysis of the kinetic data demonstrated that Red/e - react ~5 times faster than Blue/e - with the nitroxyl radical oxidant, 4-MeO-TEMPO. Similar reactivity patterns were also observed in oxidations of TiO2/e - by O2, which like 4-MeO-TEMPO is a proton-coupled electron transfer (PCET) oxidant, and by the pure electron transfer (ET) oxidant KI3. This suggests that the faster intrinsic reactivity of one trap state over another on the seconds-minutes timescale is likely a general feature of reduced TiO2 reactivity. This differential trap state reactivity is likely to influence the performance of TiO2 in photochemical/electrochemical devices, and it suggests an opportunity for tuning catalysis.
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Affiliation(s)
- Jennifer L. Peper
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
| | - Noreen E. Gentry
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
| | - Anna C. Brezny
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
- Department of Chemistry, Skidmore College, Saratoga Springs, New York 12866, United States
| | - Mackenzie J. Field
- Department of Chemistry and Department of Molecular Biology and Biochemistry, University of California, Irvine, California 92697, United States
| | - Michael T. Green
- Department of Chemistry and Department of Molecular Biology and Biochemistry, University of California, Irvine, California 92697, United States
| | - James M. Mayer
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
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10
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Proton-free electron-trapping feature of titanium dioxide nanoparticles without the characteristic blue color. Commun Chem 2019. [DOI: 10.1038/s42004-019-0191-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
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11
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Liu B, Zhao X, Yu J, Parkin IP, Fujishima A, Nakata K. Intrinsic intermediate gap states of TiO2 materials and their roles in charge carrier kinetics. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C-PHOTOCHEMISTRY REVIEWS 2019. [DOI: 10.1016/j.jphotochemrev.2019.02.001] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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12
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Chakraborty B, Gan‐Or G, Duan Y, Raula M, Weinstock IA. Visible‐Light‐Driven Water Oxidation with a Polyoxometalate‐Complexed Hematite Core of 275 Iron Atoms. Angew Chem Int Ed Engl 2019; 58:6584-6589. [DOI: 10.1002/anie.201900492] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2019] [Revised: 02/20/2019] [Indexed: 11/08/2022]
Affiliation(s)
- Biswarup Chakraborty
- Department of ChemistryBen-Gurion University of the Negev and the Ilse Katz Institute for Nanoscale Science & Technology Beer Sheva 84105 Israel
| | - Gal Gan‐Or
- Department of ChemistryBen-Gurion University of the Negev and the Ilse Katz Institute for Nanoscale Science & Technology Beer Sheva 84105 Israel
| | - Yan Duan
- Department of ChemistryBen-Gurion University of the Negev and the Ilse Katz Institute for Nanoscale Science & Technology Beer Sheva 84105 Israel
| | - Manoj Raula
- Amity Institute of Applied SciencesAmity University Noida 201313 India
| | - Ira A. Weinstock
- Department of ChemistryBen-Gurion University of the Negev and the Ilse Katz Institute for Nanoscale Science & Technology Beer Sheva 84105 Israel
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13
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Chakraborty B, Gan‐Or G, Duan Y, Raula M, Weinstock IA. Visible‐Light‐Driven Water Oxidation with a Polyoxometalate‐Complexed Hematite Core of 275 Iron Atoms. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201900492] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Biswarup Chakraborty
- Department of ChemistryBen-Gurion University of the Negev and the Ilse Katz Institute for Nanoscale Science & Technology Beer Sheva 84105 Israel
| | - Gal Gan‐Or
- Department of ChemistryBen-Gurion University of the Negev and the Ilse Katz Institute for Nanoscale Science & Technology Beer Sheva 84105 Israel
| | - Yan Duan
- Department of ChemistryBen-Gurion University of the Negev and the Ilse Katz Institute for Nanoscale Science & Technology Beer Sheva 84105 Israel
| | - Manoj Raula
- Amity Institute of Applied SciencesAmity University Noida 201313 India
| | - Ira A. Weinstock
- Department of ChemistryBen-Gurion University of the Negev and the Ilse Katz Institute for Nanoscale Science & Technology Beer Sheva 84105 Israel
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14
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Liu D, Huang P, Liu Y, Wu Z, Li D, Guo J, Wu T. Cd/In-Codoped TiO 2 nanochips for high-efficiency photocatalytic dye degradation. Dalton Trans 2018; 47:6177-6183. [PMID: 29668000 DOI: 10.1039/c8dt00242h] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Titanium dioxide has been widely investigated in the field of photocatalysis research. However, the wide bandgap (3.2 eV) greatly limits its practical applications because only ultraviolet light can be absorbed by bare TiO2. Herein, we report a facile approach to prepare Cd/In-codoped TiO2 nanochips with the capability of visible light absorption. Such bimetallic-doped TiO2 was synthesized through a two-step process: Cd/In/S-TiO2 gels were first synthesized by mixing the preformed Cd-In-S supertetrahedral nanoclusters with a titanium source, and the subsequent pyrolytic process effectively converted the gels into Cd/In-TiO2 nanochips with a thickness of ∼2.19 nm and a uniform diameter of ∼10.60 nm. Interestingly, the absorption band of Cd/In-TiO2 nanochips was adjusted by pyrolysis temperature, which further regulated the photocatalytic efficiency of dye degradation under visible light. Current research demonstrates that doping TiO2 by multimetallic sulfide nanoclusters opens up a new door to further enrich the dopants in TiO2 and broaden their potential applications.
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Affiliation(s)
- Dongliang Liu
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu 215123, China.
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