1
|
de la Fournière EM, Meichtry JM, Gautier EA, Leyva AG, Litter MI. Treatment of ethylmercury chloride by heterogeneous photocatalysis with TiO2. J Photochem Photobiol A Chem 2021. [DOI: 10.1016/j.jphotochem.2021.113205] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
2
|
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.
Collapse
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
| |
Collapse
|
3
|
Yin D, Tang J, Bai R, Yin S, Jiang M, Kan Z, Li H, Wang F, Li C. Cobalt Phosphide (Co 2P) with Notable Electrocatalytic Activity Designed for Sensitive and Selective Enzymeless Bioanalysis of Hydrogen Peroxide. NANOSCALE RESEARCH LETTERS 2021; 16:11. [PMID: 33438118 PMCID: PMC7803862 DOI: 10.1186/s11671-020-03469-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Accepted: 12/20/2020] [Indexed: 06/12/2023]
Abstract
In this work, cobalt phosphide nanoparticles (Co2P NPs) were prepared by simple and mild hydrothermal method without the use of harmful phosphorous source. The morphological structure and surface component of Co2P were characterized by transmission electron microscopy, X-ray diffraction and X-ray photoelectron spectroscopy measurements. Considering the excellent electrocatalytic reduction activity and good electrical conductivity of transition-metal phosphide, we fabricated Co2P NPs on indium tin oxide (ITO) substrate (Co2P/ITO) for H2O2 detection. The Co2P/ITO transducer displayed a rapid amperometric response less than 5 s, a broader response range from 0.001 to 10.0 mM and a low detection limit of 0.65 μM. In addition, the non-enzymatic Co2P/ITO sensor showed outstanding selectivity, reproducibility, repeatability and stability, all of which qualified the Co2P/ITO electrode for quite a reliable and promising biosensor for H2O2 sensing.
Collapse
Affiliation(s)
- Donghang Yin
- Key Laboratory of Biomedical Functional Materials, School of Science, China Pharmaceutical University, Nanjing, 211198 People’s Republic of China
| | - Junyan Tang
- Key Laboratory of Biomedical Functional Materials, School of Science, China Pharmaceutical University, Nanjing, 211198 People’s Republic of China
| | - Rongbiao Bai
- Key Laboratory of Biomedical Functional Materials, School of Science, China Pharmaceutical University, Nanjing, 211198 People’s Republic of China
| | - Shuyi Yin
- Key Laboratory of Biomedical Functional Materials, School of Science, China Pharmaceutical University, Nanjing, 211198 People’s Republic of China
| | - Mengnan Jiang
- Key Laboratory of Biomedical Functional Materials, School of Science, China Pharmaceutical University, Nanjing, 211198 People’s Republic of China
| | - Zigui Kan
- Key Laboratory of Biomedical Functional Materials, School of Science, China Pharmaceutical University, Nanjing, 211198 People’s Republic of China
| | - Hongmei Li
- Key Laboratory of Biomedical Functional Materials, School of Science, China Pharmaceutical University, Nanjing, 211198 People’s Republic of China
| | - Fei Wang
- Key Laboratory of Biomedical Functional Materials, School of Science, China Pharmaceutical University, Nanjing, 211198 People’s Republic of China
| | - Caolong Li
- Key Laboratory of Biomedical Functional Materials, School of Science, China Pharmaceutical University, Nanjing, 211198 People’s Republic of China
- Tibetan Medicine Research Institute, Tibetan Traditional Medical College, Lhasa, 850000 Tibet People’s Republic of China
| |
Collapse
|
4
|
Kinetic and mechanistic features on the reaction of stored TiO2 electrons with Hg (II), Pb (II) and Ni (II) in aqueous suspension. ARAB J CHEM 2019. [DOI: 10.1016/j.arabjc.2016.08.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
|
5
|
Wang Y, Cui Z, Xiao G, Zhao Y, Jin Y, Wang Z, Su H, Tan T. The visible-light-driven photo-reduction of Cr(VI) by formic acid in aqueous solution. Sep Purif Technol 2019. [DOI: 10.1016/j.seppur.2019.115727] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
6
|
Bao C, Chen M, Jin X, Hu D, Huang Q. Efficient and stable photocatalytic reduction of aqueous hexavalent chromium ions by polyaniline surface-hybridized ZnO nanosheets. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.01.122] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
7
|
Wei H, Hou C, Zhang Y, Nan Z. Scalable low temperature in air solid phase synthesis of porous flower-like hierarchical nanostructure SnS2 with superior performance in the adsorption and photocatalytic reduction of aqueous Cr(VI). Sep Purif Technol 2017. [DOI: 10.1016/j.seppur.2017.08.014] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
8
|
Hoseinnejad M, Jafari SM, Katouzian I. Inorganic and metal nanoparticles and their antimicrobial activity in food packaging applications. Crit Rev Microbiol 2017; 44:161-181. [DOI: 10.1080/1040841x.2017.1332001] [Citation(s) in RCA: 166] [Impact Index Per Article: 23.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Mahmoud Hoseinnejad
- Department of Food Materials and Process Design Engineering, Gorgan University of Agricultural Science and Natural Resources, Gorgan, Iran
| | - Seid Mahdi Jafari
- Department of Food Materials and Process Design Engineering, Gorgan University of Agricultural Science and Natural Resources, Gorgan, Iran
| | - Iman Katouzian
- Department of Food Materials and Process Design Engineering, Gorgan University of Agricultural Science and Natural Resources, Gorgan, Iran
- Nano-encapsulation in the Food, Nutraceutical, and Pharmaceutical Industries Group (NFNPIG), Universal Scientific Education and Research Network (USERN), Tehran, Iran
| |
Collapse
|
9
|
Choi Y, Koo MS, Bokare AD, Kim DH, Bahnemann DW, Choi W. Sequential Process Combination of Photocatalytic Oxidation and Dark Reduction for the Removal of Organic Pollutants and Cr(VI) using Ag/TiO 2. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2017; 51:3973-3981. [PMID: 28277657 DOI: 10.1021/acs.est.6b06303] [Citation(s) in RCA: 91] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We investigated a sequential photocatalysis-dark reaction, wherein organic pollutants were degraded on Ag/TiO2 under UV irradiation and the dark reduction of hexavalent chromium (Cr(VI)) was subsequently followed. The photocatalytic oxidation of 4-chlorophenol (4-CP), a test organic substrate, induced the generation of degradation intermediates and the storage of electrons in Ag/TiO2 which were then utilized for reducing Cr(VI) in the postirradiation period. The dark reduction efficiency of Cr(VI) was much higher with Ag/TiO2 (87%), compared with bare TiO2 (27%) and Pt/TiO2 (22%). The Cr(VI) removal by Ag/TiO2 (87%) was contributed by adsorption (31%), chemical reduction by intermediates of 4-CP degradation (26%), and reduction by electrons stored in Ag (30%). When formic acid, humic acid or ethanol was used as an alternative organic substrate, the electron storage effect was also observed. The postirradiation removal of Cr(VI) on Ag/TiO2 continued for hours, which is consistent with the observation that a residual potential persisted on the Ag/TiO2 electrode in the dark whereas little residual potential was observed on bare TiO2 and Pt/TiO2 electrodes. The stored electrons in Ag/TiO2 and their transfer to Cr(VI) were also indicated by the UV-visible absorption spectral change. Moreover, the electrons stored in the preirradiated Ag/TiO2 reacted with O2 with showing a sign of low-level OH radical generation in the dark period.
Collapse
Affiliation(s)
- Yeoseon Choi
- Department of Chemical Engineering and Division of Environmental Science and Engineering, Pohang University of Science and Technology (POSTECH) , Pohang, Korea 37673
| | - Min Seok Koo
- Department of Chemical Engineering and Division of Environmental Science and Engineering, Pohang University of Science and Technology (POSTECH) , Pohang, Korea 37673
| | - Alok D Bokare
- Department of Chemical Engineering and Division of Environmental Science and Engineering, Pohang University of Science and Technology (POSTECH) , Pohang, Korea 37673
| | - Dong-Hyo Kim
- Department of Chemical Engineering and Division of Environmental Science and Engineering, Pohang University of Science and Technology (POSTECH) , Pohang, Korea 37673
| | - Detlef W Bahnemann
- Laboratory "Photoactive Nanocomposite Materials" Saint-Petersburg State University, Saint-Petersburg, Russia and "Photocatalysis and Nanotechnology", Institut fuer Technische Chemie, Gottfried Wilhelm Leibniz Universitaet Hannover , Hannover, Germany
| | - Wonyong Choi
- Department of Chemical Engineering and Division of Environmental Science and Engineering, Pohang University of Science and Technology (POSTECH) , Pohang, Korea 37673
| |
Collapse
|
10
|
Wu Q, Liu C, Peng J, Liu F. New insights into high temperature hydrothermal synthesis in the preparation of visible-light active, ordered mesoporous SiO2–TiO2 composited photocatalysts. RSC Adv 2017. [DOI: 10.1039/c7ra01368j] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Carbon doped, visible light active and ordered mesoporous TiO2–SiO2 nanocomposites have been successfully synthesized via one step high temperature (180 °C) hydrothermal technology.
Collapse
Affiliation(s)
- Qin Wu
- College of Chemistry & Chemical Engineering
- Shaoxing University
- Shaoxing
- China
| | - Chen Liu
- College of Chemistry & Chemical Engineering
- Shaoxing University
- Shaoxing
- China
| | - Jinjun Peng
- College of Chemistry & Chemical Engineering
- Shaoxing University
- Shaoxing
- China
| | - Fujian Liu
- College of Chemistry & Chemical Engineering
- Shaoxing University
- Shaoxing
- China
| |
Collapse
|
11
|
Zhang Y, Zhang F, Yang Z, Xue H, Dionysiou DD. Development of a new efficient visible-light-driven photocatalyst from SnS2 and polyvinyl chloride. J Catal 2016. [DOI: 10.1016/j.jcat.2016.10.022] [Citation(s) in RCA: 127] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
12
|
Li Z, Xin Y, Wu W, Fu B, Zhang Z. Topotactic Conversion of Copper(I) Phosphide Nanowires for Sensitive Electrochemical Detection of H2O2 Release from Living Cells. Anal Chem 2016; 88:7724-9. [DOI: 10.1021/acs.analchem.6b01637] [Citation(s) in RCA: 106] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Zhenzhen Li
- School of Chemistry and Molecular
Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, China
| | - Yanmei Xin
- School of Chemistry and Molecular
Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, China
| | - Wenlong Wu
- School of Chemistry and Molecular
Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, China
| | - Baihe Fu
- School of Chemistry and Molecular
Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, China
| | - Zhonghai Zhang
- School of Chemistry and Molecular
Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, China
| |
Collapse
|
13
|
Meichtry JM, Levy IK, Mohamed HH, Dillert R, Bahnemann DW, Litter MI. Mechanistic Features of the TiO2Heterogeneous Photocatalysis of Arsenic and Uranyl Nitrate in Aqueous Suspensions Studied by the Stopped-Flow Technique. Chemphyschem 2016; 17:885-92. [DOI: 10.1002/cphc.201500949] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2015] [Indexed: 11/10/2022]
Affiliation(s)
- Jorge M. Meichtry
- Gerencia Química; Comisión Nacional de Energía Atómica; Av. Gral. Paz 1499 1650 San Martín Prov. de Buenos Aires Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET); Av. Rivadavia 1917 1033 Ciudad Autónoma de Buenos Aires Argentina
| | - Ivana K. Levy
- Gerencia Química; Comisión Nacional de Energía Atómica; Av. Gral. Paz 1499 1650 San Martín Prov. de Buenos Aires Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET); Av. Rivadavia 1917 1033 Ciudad Autónoma de Buenos Aires Argentina
| | - Hanan H. Mohamed
- Chemistry Department; Faculty of Science; Helwan University; Ain Helwan Cairo Egypt
| | - Ralf Dillert
- Institut für Technische Chemie; Leibniz Universität Hannover; Callinstrasse 3 30167 Hannover Germany
| | - Detlef W. Bahnemann
- Institut für Technische Chemie; Leibniz Universität Hannover; Callinstrasse 3 30167 Hannover Germany
- Laboratory for Nanocomposite Materials; Department of Photonics; Faculty of Physics; Saint-Petersburg State University; Ulianovskaia str. 3, Peterhof Saint-Petersburg 198504 Russia
| | - Marta I. Litter
- Gerencia Química; Comisión Nacional de Energía Atómica; Av. Gral. Paz 1499 1650 San Martín Prov. de Buenos Aires Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET); Av. Rivadavia 1917 1033 Ciudad Autónoma de Buenos Aires Argentina
- Instituto de Investigación e Ingeniería Ambiental; Universidad Nacional de General San Martín, Campus Miguelete; Av. 25 de Mayo y Francia 1650 San Martín Prov. de Buenos Aires Argentina
| |
Collapse
|
14
|
Li Z, Xin Y, Zhang Z. New Photocathodic Analysis Platform with Quasi-Core/Shell-Structured TiO2@Cu2O for Sensitive Detection of H2O2 Release from Living Cells. Anal Chem 2015; 87:10491-7. [DOI: 10.1021/acs.analchem.5b02644] [Citation(s) in RCA: 94] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Zhenzhen Li
- School of Chemistry and Molecular
Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, China
| | - Yanmei Xin
- School of Chemistry and Molecular
Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, China
| | - Zhonghai Zhang
- School of Chemistry and Molecular
Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, China
| |
Collapse
|