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Wei Y, Li W, Miao H, Zhang H, Ma M. Visible light activity of Bi 2WO 6@TCNQ with core-shell structure in phenol degradation. RSC Adv 2018; 8:35367-35373. [PMID: 35547904 PMCID: PMC9087944 DOI: 10.1039/c8ra06304d] [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: 07/26/2018] [Accepted: 09/18/2018] [Indexed: 11/21/2022] Open
Abstract
Bi2WO6@TCNQ visible light photocatalyst with a core-shell structure was synthesized by adsorption methods. The core-shell structure results in the fast transfer of photogenerated carriers, reduced carrier recombination and photogenerated holes on the HOMO level of TCNQ can be injected into the VB of Bi2WO6 under visible light irradiation, resulting in the direct oxidation of organic pollutants. The photocatalytic activity of Bi2WO6@TCNQ was gradually enhanced with an increasing proportion of TCNQ. When the mass fraction of TCNQ reaches 0.5%, it exhibits the highest visible light activity. The apparent rate constant k of Bi2WO6@TCNQ-0.5% is almost 2.2 times as high as that of pure Bi2WO6.
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Affiliation(s)
- Yunxia Wei
- Provincial Key Laboratory of Gansu Higher Education for City Environmental Pollution Control, College of Chemistry and Chemical Engineering, Lanzhou City UniversityLanzhou 730070P. R. China
| | - Wenlu Li
- Department of Chemistry, Tsinghua UniversityBeijing 100084P. R. China
| | - Hong Miao
- Department of Chemistry, Tsinghua UniversityBeijing 100084P. R. China
| | - Hanjie Zhang
- Department of Chemistry, Tsinghua UniversityBeijing 100084P. R. China
| | - Mingguang Ma
- Provincial Key Laboratory of Gansu Higher Education for City Environmental Pollution Control, College of Chemistry and Chemical Engineering, Lanzhou City UniversityLanzhou 730070P. R. China
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Yang F, Zhao Q, Xu C, Zou Y, Dong H, Zheng Y, Hu W. Unveiling the Switching Riddle of Silver Tetracyanoquinodimethane Towards Novel Planar Single-Crystalline Electrochemical Metallization Memories. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2016; 28:7094-7100. [PMID: 27276441 DOI: 10.1002/adma.201600902] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2016] [Revised: 05/07/2016] [Indexed: 06/06/2023]
Abstract
The switching riddle of AgTCNQ is shown to be caused by the solid electrolyte mechanism. Both factors of bulk phase change and contact issue play key roles in the efficient work of the devices. An effective strategy is developed to locate the formation/disruption of Ag conductive filaments using the planar asymmetric configuration of Au/AgTCNQ/AlOx /Al. These novel electrochemical metallization memories demonstrate many promising properties.
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Affiliation(s)
- Fangxu Yang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
| | - Qiang Zhao
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
| | - Chunhui Xu
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
| | - Ye Zou
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
| | - Huanli Dong
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
| | - Yonggang Zheng
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
| | - Wenping Hu
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
- Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry School of Sciences, Tianjin University, Collaborative Innovation Center of Chemical Science and Engineering, Tianjin, 300072, China
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Lu J, Qu X, Peleckis G, Boas JF, Bond AM, Martin LL. Synthesis and Structural Characterization of a TCNQ Based Organic Semi-Conducting Material with a 2:5 Stoichiometry. J Org Chem 2011; 76:10078-82. [DOI: 10.1021/jo2018334] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | | | - Germanas Peleckis
- Institute for Superconducting
and Electronic Materials Faculty of Engineering, The University of Wollongong, Wollongong, NSW 2522, Australia
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Qu X, Lu J, Boas JF, Bond AM, Martin LL. Two-step electrochemically directed synthesis of Pr4N(TCNQ)n (n=1, 2): preparation, structure, and properties of a magnetically isolated dimer and a quasi-one-dimensional chain. Chemistry 2011; 17:9350-8. [PMID: 21732430 DOI: 10.1002/chem.201100054] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2011] [Indexed: 11/05/2022]
Abstract
Solid-state electrochemistry of a tetracyanoquinodimethane (TCNQ)-modified electrode in contact with a tetrapropylammonium cation (Pr(4)N(+)) electrolyte showed two electron-transfer steps to give Pr(4)N(TCNQ)(2) (1) and Pr(4)N(TCNQ) (2) rather than the traditional one-electron step to directly give Pr(4)N(TCNQ). Two thermodynamically stable Pr(4)N(+)-TCNQ stoichiometries, 1 and 2, were synthesized and characterized. The degree of charge transfer (ρ) calculated from the crystal structure is -0.5 for the TCNQ moieties in 1 and -1.0 for those in 2. Raman spectra for Pr(4)N(TCNQ)(2) show only one resonance for the extracyclic C=C stretching at 1423 cm(-1), which lies approximately midway between that of TCNQ at 1454 cm(-1) and TCNQ(-) at 1380 cm(-1). Both the magnetic susceptibility and EPR spectra are temperature-dependent, with a magnetic moment close to that for one unpaired electron per (TCNQ)(2) unit in 1, whereas 2 is almost diamagnetic. Pressed discs of both complexes show conductivity (1-2×10(-5) S cm(-1)) in the semiconductor range. For 1, the position of zero current for the steady-state voltammograms implies 50% of TCNQ(-) and 50% TCNQ(0) is present in solution, thereby supporting a dissociation of (TCNQ)(2)(-) in solution, but is indicative of only TCNQ(-) being present for 2.
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Affiliation(s)
- Xiaohu Qu
- School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
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Qu X, Nafady A, Mechler A, Zhang J, Harris AR, O’Mullane AP, Martin LL, Bond AM. AFM study of morphological changes associated with electrochemical solid–solid transformation of three-dimensional crystals of TCNQ to metal derivatives (metal = Cu, Co, Ni; TCNQ = tetracyanoquinodimethane). J Solid State Electrochem 2007. [DOI: 10.1007/s10008-007-0423-0] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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