51
|
Jahdi M, Mishra SB, Nxumalo EN, Mhlanga SD, Mishra AK. Mechanistic pathways for the degradation of SMX drug and floatation of degraded products using F–Pt co-doped TiO2 photocatalysts. RSC Adv 2020; 10:27662-27675. [PMID: 35516913 PMCID: PMC9055604 DOI: 10.1039/d0ra05009a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2020] [Accepted: 07/06/2020] [Indexed: 12/31/2022] Open
Abstract
This work presents smart pathways to enhance the photocatalytic activity of TiO2via co-doping with fluorine (F) and platinum (Pt) to form F–Pt co-doped TiO2 photocatalysts and investigates the unique and unusual fluorination of the floated products. Our investigations indicate that the crystalline structure of the photocatalysts was a mixture of anatase and brookite phases and that the nanoparticles of the synthesized nanocomposites had nanometric sizes (4–25 nm). The F–Pt co-doped TiO2 nano-photocatalysts demonstrated degradation of sulfamethoxazole (SMX) drug of >93% within 90 min under direct solar light and 58% degradation within 360 min under a solar simulator. Thus, co-doping TiO2 with F and Pt atoms to form F–Pt co-doped TiO2 nanocomposite is an efficient pathway to achieve high photocatalytic performance escorted with the formation of floating metal-fluoropolymer, unlike pristine TiO2 which has less photocatalytic degradation and no generation of a floating polymer. Our photocatalytic protocol demonstrates that the degradation of SMX started with redox reactions of oxygen and water absorbed on the surface of the prepared nanocomposites to form superoxide anions (O2˙−) and hydroxy radicals (˙OH) which have oxidation superpower. The resultant products were subsequently fluorinated by fluoride radical ions and floated as metal-fluoropolymer. This work presents smart pathways to enhance the photocatalytic activity of TiO2via co-doping with fluorine (F) and platinum (Pt) to form F–Pt co-doped TiO2 photocatalysts and investigates the unique and unusual fluorination of the floated products.![]()
Collapse
Affiliation(s)
- Majid Jahdi
- Nanotechnology and Water Sustainability Research Unit
- College of Science
- Engineering and Technology
- University of South Africa
- Johannesburg
| | - Shivani B. Mishra
- Nanotechnology and Water Sustainability Research Unit
- College of Science
- Engineering and Technology
- University of South Africa
- Johannesburg
| | - Edward N. Nxumalo
- Nanotechnology and Water Sustainability Research Unit
- College of Science
- Engineering and Technology
- University of South Africa
- Johannesburg
| | - Sabelo D. Mhlanga
- DST/Mintek Nanotechnology Innovation Centre
- Council for Mineral Technology (MINTEK)
- South Africa
| | - Ajay K. Mishra
- Nanotechnology and Water Sustainability Research Unit
- College of Science
- Engineering and Technology
- University of South Africa
- Johannesburg
| |
Collapse
|
52
|
Pathiraja G, Yarbrough R, Rathnayake H. Fabrication of ultrathin CuO nanowires augmenting oriented attachment crystal growth directed self-assembly of Cu(OH) 2 colloidal nanocrystals. NANOSCALE ADVANCES 2020; 2:2897-2906. [PMID: 36132408 PMCID: PMC9419473 DOI: 10.1039/d0na00308e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Accepted: 05/18/2020] [Indexed: 05/12/2023]
Abstract
Augmenting the oriented attachment (OA) crystal growth phenomena, the fabrication of ultrathin CuO nanowires is demonstrated from self-assembled one-dimensional (1D) nanowires of Cu(OH)2 nanocrystals for the first time.
Collapse
Affiliation(s)
- Gayani Pathiraja
- Department of Nanoscience
- Joint School of Nanoscience and Nanoengineering
- University of North Carolina at Greensboro
- Greensboro
- USA
| | - Ryan Yarbrough
- Department of Nanoscience
- Joint School of Nanoscience and Nanoengineering
- University of North Carolina at Greensboro
- Greensboro
- USA
| | - Hemali Rathnayake
- Department of Nanoscience
- Joint School of Nanoscience and Nanoengineering
- University of North Carolina at Greensboro
- Greensboro
- USA
| |
Collapse
|
53
|
de Oliveira CPM, Viana MM, Amaral MCS. WITHDRAWN: Coupling photocatalytic degradation using a green TiO 2 catalyst to membrane bioreactor for petroleum refinery wastewater reclamation. Comp Immunol Microbiol Infect Dis 2019; 68:101403. [PMID: 31841989 DOI: 10.1016/j.cimid.2019.101403] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Revised: 10/24/2019] [Accepted: 11/10/2019] [Indexed: 10/25/2022]
Affiliation(s)
- Caique Prado Machado de Oliveira
- Department of Sanitary and Environmental Engineering, Federal University of Minas Gerais, 6627 Antônio Carlos Avenue, Campus Pampulha, Belo Horizonte, MG, Brazil
| | - Marcelo Machado Viana
- Department of Chemistry, Federal University of Minas Gerais, 6627 Antônio Carlos Avenue, Campus Pampulha, Belo Horizonte, MG, Brazil
| | - Míriam Cristina Santos Amaral
- Department of Sanitary and Environmental Engineering, Federal University of Minas Gerais, 6627 Antônio Carlos Avenue, Campus Pampulha, Belo Horizonte, MG, Brazil.
| |
Collapse
|
54
|
Selli D, Motta S, Di Valentin C. Impact of surface curvature, grafting density and solvent type on the PEGylation of titanium dioxide nanoparticles. J Colloid Interface Sci 2019; 555:519-531. [DOI: 10.1016/j.jcis.2019.07.106] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Revised: 07/16/2019] [Accepted: 07/31/2019] [Indexed: 01/24/2023]
|
55
|
Type I photodynamic therapy by organic–inorganic hybrid materials: From strategies to applications. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2019.05.016] [Citation(s) in RCA: 102] [Impact Index Per Article: 20.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
|
56
|
Ye L, Deng Y, Wang L, Xie H, Su F. Bismuth-Based Photocatalysts for Solar Photocatalytic Carbon Dioxide Conversion. CHEMSUSCHEM 2019; 12:3671-3701. [PMID: 31107595 DOI: 10.1002/cssc.201901196] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2019] [Revised: 05/18/2019] [Indexed: 05/13/2023]
Abstract
Photocatalytic CO2 conversion into solar fuels is an effective means for simultaneously solving both the greenhouse effect and energy crisis. In the past ten years, bismuth-based photocatalysts for environmental remediation have experienced a golden period of development. However, solar photocatalytic CO2 conversion has only been developed over the past five years and, until now, no reviews have been published on bismuth-based photocatalysts for the photocatalytic conversion of CO2 . For the first time, solar photocatalytic CO2 conversion systems are reviewed herein. Synthetic methods and photocatalytic CO2 performances of bismuth-based photocatalysts, including Sillén-structured BiOX (X=Cl, Br, I); Aurivillius-structured Bi2 MO6 (M=Mo, W); and Scheelite-structured BiVO4 , Bi2 S3 , BiYO3 , and BiOIO3 , are summarized. In addition, activity-enhancing strategies for this photocatalyst family, including oxygen vacancies, bismuth-rich strategy, facet control, conventional type II heterojunction, Z-scheme heterojunction, and cocatalyst deposition, are reviewed. Finally, the main mechanistic research methods, such as in situ FTIR spectroscopy and theoretical calculations, are presented. Challenges and research trends reported in studies of bismuth-based photocatalysts for photocatalytic CO2 conversion are discussed and summarized.
Collapse
Affiliation(s)
- Liqun Ye
- College of Materials and Chemical Engineering, Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, China Three Gorges University, Yichang, 443002, PR China
| | - Yu Deng
- College of Materials and Chemical Engineering, Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, China Three Gorges University, Yichang, 443002, PR China
| | - Li Wang
- Engineering Technology Research Center of Henan Province for Solar Catalysis, College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang, 473061, PR China
| | - Haiquan Xie
- Engineering Technology Research Center of Henan Province for Solar Catalysis, College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang, 473061, PR China
| | - Fengyun Su
- Engineering Technology Research Center of Henan Province for Solar Catalysis, College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang, 473061, PR China
| |
Collapse
|
57
|
Photocatalytic process for total arsenic removal using an innovative BiVO4/TiO2/LED system from aqueous solution: Optimization by response surface methodology (RSM). J Taiwan Inst Chem Eng 2019. [DOI: 10.1016/j.jtice.2019.04.036] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
|
58
|
Li K, Zhu Y, Zhang Y, Zhang D, Zhou J, Li X, Ruan S. Built-in electric field promotes photoexcitation separation and depletion of most carriers in TiO 2:C UV detectors. NANOTECHNOLOGY 2019; 30:295502. [PMID: 30947163 DOI: 10.1088/1361-6528/ab15f0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
TiO2 has been widely used in ultraviolet (UV) photodetectors, but due to the large number of structural defects and strong band-to-band recombination of the exciton in TiO2, the devices usually have large dark current (I d) and low light current (I l), which seriously reduces the sensitivity and responsivity (R) of the TiO2 based devices. In this work, carbon (C) quantum dots (QDs) are introduced into TiO2 film to ameliorate these issues. Due to the difference of work function between TiO2 nanoparticles and C QDs, the built-in electric field (E bi) can be formed, which effectively facilitates the photogenerated exciton dissociation in the TiO2 film under UV illumination. Meanwhile, the constructed depletion region in dark reduces the majority carrier density, thus decreasing the I d of the photodetector. Moreover, the E bi and depletion region will also contribute to the faster charge collection under UV illumination and recombination of the electron in dark, which is beneficial for the improved response/recovery speed of the device.
Collapse
Affiliation(s)
- Kanzhe Li
- State Key Laboratory on Integrated Optoelectronics, Jilin University, Changchun 130012, People's Republic of China
| | | | | | | | | | | | | |
Collapse
|
59
|
Wu Q, Cheng Y, Huang F, Li X, Cui X, Xu J, Wang Y. In-situ creating elastic lattice OO bonds over semicrystalline yellow TiO 2 nanoparticles for significantly enhanced photocatalytic H 2 production. JOURNAL OF HAZARDOUS MATERIALS 2019; 374:287-295. [PMID: 31009893 DOI: 10.1016/j.jhazmat.2019.04.035] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Revised: 04/08/2019] [Accepted: 04/09/2019] [Indexed: 06/09/2023]
Abstract
Atomic defects (e.g., Ti3+, oxygen vacancies) have been intenstively investigated for modifying TiO2 in order to reach visible light active photocatalytic H2 production. However, the atomic defects within TiO2 could easily act as photo-generated charge-carrier recombination centers, resulting in relatively low H2 conversion efficiency. In this paper, semicrystalline yellow TiO2 nanoparticles rich of superoxide ions are new synthesized by a simple aqueous solution method. Instead of introducing atomic defects, we show for the first time that catalytic performance can also be significantly improved via in-situ creating lattice OO bonds within metastable semicrystalline TiO2. The synthesized semicrystalline yellow TiO2 exhibits significantly enhanced photocatalytic activity for H2 production after cycle tests. The formaldehyde in aqueous solution is used as target pollutant to simulate industrial wastewater. In-situ created elastic lattice OO bonds are proposed to improve catalytic performance through facilitating the breakage of CH bonds of HCHO. A series of internally consistent reaction equations is proposed that describes the role of in-situ created lattice OO bonds for improving the catalytic performance. This is strongly supported by that the H2 production rate at the end of the fourth cycle test is significantly more than that of the beginning of the first cycle test.
Collapse
Affiliation(s)
- Qingping Wu
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, P. R. China
| | - Yao Cheng
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, P. R. China.
| | - Feng Huang
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, P. R. China
| | - Xiao Li
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, P. R. China
| | - Xiangshui Cui
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, P. R. China
| | - Ju Xu
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, P. R. China
| | - Yuansheng Wang
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, P. R. China.
| |
Collapse
|
60
|
Karunakaran C, JebaSingh I, Vinayagamoorthy P. Synthesis of superparamagnetic biocidal superior solar photocatalytic Fe3O4-implanted Ag2S-capped ZnO micro-clubbells. SN APPLIED SCIENCES 2019. [DOI: 10.1007/s42452-019-0758-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
|
61
|
Meng Y, Zhang J, Wang Z, Liang JX, Zhu C. Theoretical investigation on the photoelectrochemical anticorrosion mechanism of SnO2–TiO2nanotube. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2019. [DOI: 10.1142/s0219633619500160] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
In this work, the calculated electron density difference, Bader charge analysis and the density of states (DOS) of SnO2–TiO2-nanotubes (NTs) indicate that the electrons are transferred from the Ti atoms of TiO2into the O atoms of (SnO[Formula: see text] in SnO2–TiO2-NTs and the supported (SnO[Formula: see text] cluster acts as the role of storage for photogenerated electrons excited from TiO2-NTs, which is in good agreement with experimental results that the SnO2–TiO2-NTs composite films have higher photocurrent density for photocathodic protection of 304 stainless steel (304SS). The theoretical investigations provide a plausible explanation for the photoelectrochemical anticorrosion mechanism of SnO2–TiO2-NTs using periodic density functional theory (DFT).
Collapse
Affiliation(s)
- Yang Meng
- School of Chemistry and Chemical Engineering, Guizhou University, Guizhou 550025, P. R. China
| | - Jianjun Zhang
- School of Chemistry and Chemical Engineering, Guizhou University, Guizhou 550025, P. R. China
| | - Zhunzhun Wang
- Guizhou Provincial Key Laboratory of Computational Nano-Material Science, Guizhou Synergetic Innovation Center of Scientific Big Data for Advanced Manufacturing Technology, Guizhou Education University, Guiyang 550018, P. R. China
| | - Jin-Xia Liang
- Guizhou Provincial Key Laboratory of Computational Nano-Material Science, Guizhou Synergetic Innovation Center of Scientific Big Data for Advanced Manufacturing Technology, Guizhou Education University, Guiyang 550018, P. R. China
| | - Chun Zhu
- School of Chemistry and Chemical Engineering, Guizhou University, Guizhou 550025, P. R. China
| |
Collapse
|
62
|
Díaz-Rodríguez TG, Pacio M, Agustín-Serrano R, Juárez-Santiesteban H, Muñiz J. Understanding structure of small $${\hbox {TiO}}_2$$ nanoparticles and adsorption mechanisms of PbS quantum dots for solid-state applications: a combined theoretical and experimental study. Theor Chem Acc 2019. [DOI: 10.1007/s00214-019-2480-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
63
|
Yan Q, Xie X, Liu Y, Wang S, Zhang M, Chen Y, Si Y. Constructing a new Z-scheme multi-heterojunction photocataslyts Ag-AgI/BiOI-Bi 2O 3 with enhanced photocatalytic activity. JOURNAL OF HAZARDOUS MATERIALS 2019; 371:304-315. [PMID: 30856441 DOI: 10.1016/j.jhazmat.2019.03.031] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2019] [Revised: 03/05/2019] [Accepted: 03/06/2019] [Indexed: 05/07/2023]
Abstract
The series Ag-AgI/BiOI-Bi2O3 visible-light-driven photocataslyts were successfully synthesized by solvothermal method. The as-synthesized samples were systematically characterized by XRD, SEM, TEM, EDS, BET, XPS, FR-IR, UV-vis DRS, photoelectrochemical measurements and EPR. The formation mechanism of the new composite photocataslyts was investigated and the simulate formation process had been illustrated. The photocatalytic properties of the samples were evaluated by degradation of methyl orange under visible-light irradiation. The results shown that the 30% Ag-AgI/BiOI-Bi2O3 photocataslyts possessed the best photocatalytic activity and the kinetics reaction models were followed pseudo-first-order kinetics. The enhanced photocatalytic performance could be attributed to the effective separation and transfer of electron-hole pairs resulting by the deposing of Ag-AgI nanoparticles and Bi2O3. The photocatalytic mechanism was deduced by trapping experiments and EPR, and the results demonstrated that h+, OH, O2- radicals played different roles in the degradation. Furthermore, a new Z-scheme multi-heterojunction mechanism was proposed basing on the results of trapping experiments and EPR.
Collapse
Affiliation(s)
- Qishe Yan
- Institute of Chemistry and Molecular Engineering, Zhengzhou University, No.100 Science Avenue, High-Tech Zone, Zhengzhou, Henan, 450001, China.
| | - Xin Xie
- Institute of Chemistry and Molecular Engineering, Zhengzhou University, No.100 Science Avenue, High-Tech Zone, Zhengzhou, Henan, 450001, China.
| | - Yonggang Liu
- Institute of Chemistry and Molecular Engineering, Zhengzhou University, No.100 Science Avenue, High-Tech Zone, Zhengzhou, Henan, 450001, China.
| | - Shenbo Wang
- Institute of Chemistry and Molecular Engineering, Zhengzhou University, No.100 Science Avenue, High-Tech Zone, Zhengzhou, Henan, 450001, China.
| | - Menghan Zhang
- Institute of Chemistry and Molecular Engineering, Zhengzhou University, No.100 Science Avenue, High-Tech Zone, Zhengzhou, Henan, 450001, China.
| | - Yongyang Chen
- Institute of Chemistry and Molecular Engineering, Zhengzhou University, No.100 Science Avenue, High-Tech Zone, Zhengzhou, Henan, 450001, China.
| | - Yushan Si
- Institute of Chemistry and Molecular Engineering, Zhengzhou University, No.100 Science Avenue, High-Tech Zone, Zhengzhou, Henan, 450001, China.
| |
Collapse
|
64
|
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]
|
65
|
Yan X, Zhao H, Li T, Zhang W, Liu Q, Yuan Y, Huang L, Yao L, Yao J, Su H, Su Y, Gu J, Zhang D. In situ synthesis of BiOCl nanosheets on three-dimensional hierarchical structures for efficient photocatalysis under visible light. NANOSCALE 2019; 11:10203-10208. [PMID: 31112198 DOI: 10.1039/c9nr02304f] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Assembling two-dimensional (2D) nanomaterials into three-dimensional (3D) hierarchical structures with novel functions is challenging and has attracted considerable attention. However, it is quite difficult to obtain complex 3D architectures of 2D materials with a uniform and intact structure using traditional methods, such as hydrothermal/solvothermal methods and direct precipitation methods. Here, we use butterfly wing scales as bio-templates to prepare 3D hierarchical BiOCl/Au wing scales for plasmonic photocatalysis. The as-prepared materials exhibit excellent photodegradation of rhodamine B (RhB) under visible light. The degradation rates of BiOCl microspheres and BiOCl and BiOCl/Au butterfly wing scales are 48.8%, 72.6%, and 93.8%, respectively, within 20-min illumination at the same loading capacities. This excellent performance of BiOCl/Au is attributed to the coupling of enhanced carrier separation efficiency and the effect of localized surface plasmon resonance (LSPR) aroused by 3D metallic structures. This study provides a relatively facile method to obtain complex 3D constructure of 2D materials. It also demonstrates a nature-led route to prepare highly efficient plasmonic photocatalysts.
Collapse
Affiliation(s)
- Xudong Yan
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
66
|
Controllable Fabrication of Heterogeneous p-TiO2 QDs@g-C3N4 p-n Junction for Efficient Photocatalysis. Catalysts 2019. [DOI: 10.3390/catal9050439] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Photocatalytic technology has been considered to be an ideal approach to solve the energy and environmental crises, and TiO2 is regarded as the most promising photocatalyst. Compared with bare TiO2, TiO2 based p-n heterojunction exhibits a much better performance in charge separation, light absorption and photocatalytic activity. Herein, we developed an efficient method to prepare p-type TiO2 quantum dots (QDs) and decorated graphitic carbonitrile (g-C3N4) nanocomposites, while the composition and structure of the TiO2@g-C3N4 were analyzed by X-ray diffraction, Fourier transform infrared spectroscopy, thermogravimetric analysis, transmission electron microscopy, X-ray photoelectron spectroscopy and UV-visible diffuse reflectance spectroscopy characterizations. The characterization results reveal the surface decorated TiO2 quantum dots is decomposed by titanium glycerolate, which exhibits p-type conductivity. The presence of p-n heterojunction over interface is confirmed, and photoluminescence results indicate a better performance in transfer and separation of photo-generated charge carriers than pure semiconductors and type-II heterojunction. Moreover, the synergy of p-n heterojunction over interface, strong interface interaction, and quantum-size effect significantly contributes to the promoted performance of TiO2 QDs@g-C3N4 composites. As a result, the as-fabricated TiO2 QDs@g-C3N4 composite with a p/n mass ratio of 0.15 exhibits improved photo-reactivity of 4.3-fold and 5.4-fold compared to pure g-C3N4 in degradation of organic pollutant under full solar spectrum and visible light irradiation, respectively.
Collapse
|
67
|
Zhang W, Hu Y, Yan C, Hong D, Chen R, Xue X, Yang S, Tian Y, Tie Z, Jin Z. Surface plasmon resonance enhanced direct Z-scheme TiO 2/ZnTe/Au nanocorncob heterojunctions for efficient photocatalytic overall water splitting. NANOSCALE 2019; 11:9053-9060. [PMID: 31025687 DOI: 10.1039/c9nr01732a] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Solar-driven photocatalytic overall water splitting is regarded as one of the ideal strategies to generate renewable hydrogen energy without the initiation of environmental issues. However, there are still a few remaining challenges to develop wide-light-absorption and stable photocatalysts for the simultaneous production of H2 and O2 in pure water without sacrificial reagents. Herein, we report the design and preparation of Z-scheme TiO2/ZnTe/Au nanocorncob heterojunctions by homogeneously decorating Au nanoparticles onto the surface of core-shell TiO2/ZnTe coaxial nanorods for highly efficient overall water splitting. With the appropriate band structure of TiO2/ZnTe heterojunctions and the surface plasmon resonance enhancement of Au nanoparticles, the well-designed TiO2/ZnTe/Au nanocorncob heterojunctions can synergistically make effective utilization of broad-range solar light illunimation and enhance the separation efficency of electron-hole pairs, as evidenced by UV-Vis absorption and time-resolved photoluminescence spectroscopy. Photoelectrochemical characterization confirms that the water-splitting reaction on TiO2/ZnTe/Au nanocorncobs is mainly carried out via a two-electron/two-electron transfer process with an intermediate product of H2O2. As a result, the TiO2/ZnTe/Au nanocorncob photocatalyst can generate H2 and O2 with a stoichiometric ratio of 2 : 1 under light irradiation without any sacrificial agents, exhibiting a high H2 production rate of 3344.0 μmol g-1 h-1 and a solar-to-hydrogen (STH) efficiency of 0.98%. Moreover, the TiO2/ZnTe/Au nanocorncob heterojunctions show high stability and well-preserved morphological integrity after long-term photocatalytic tests. This study provides a prototype route to produce clean hydrogen energy from only sunlight, pure water, and rationally-designed heterojunction photocatalysts.
Collapse
Affiliation(s)
- Wenjun Zhang
- Key Laboratory of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu 210023, China.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
68
|
Wang W, Zhao X, Cao Y, Yan Z, Zhu R, Tao Y, Chen X, Zhang D, Li G, Phillips DL. Copper Phosphide-Enhanced Lower Charge Trapping Occurrence in Graphitic-C 3N 4 for Efficient Noble-Metal-Free Photocatalytic H 2 Evolution. ACS APPLIED MATERIALS & INTERFACES 2019; 11:16527-16537. [PMID: 30990659 DOI: 10.1021/acsami.9b01421] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Graphitic carbon nitride (g-C3N4) fundamental photophysical processes exhibit a high frequency of charge trapping due to physicochemical defects. In this study, a copper phosphide (Cu3P) and g-C3N4 hybrid was synthesized via a facile phosphorization method. Cu3P, as an electron acceptor, efficiently captures the photogenerated electrons and drastically improved the charge separation rate to cause a significantly enhanced photocatalytic performance. Moreover, the robust and intimate chemical interactions between Cu3P and g-C3N4 offers a rectified charge-transfer channel that can lead to a higher H2 evolution rate (HRE, 277.2 μmol h-1 g-1) for this hybrid that is up to 370 times greater than that achieved from using bare g-C3N4 (HRE, 0.75 μmol h-1 g-1) with a quantum efficiency of 3.74% under visible light irradiation (λ = 420 nm). To better determine the photophysical characteristics of the Cu3P-induced charge antitrapping behavior, ultrafast time-resolved spectroscopy measurements were used to investigate the charge carriers' dynamics from femtosecond to nanosecond time domains. The experimental results clearly revealed that Cu3P can effectively enhance charge transfer and suppress photoelectron-hole recombination.
Collapse
Affiliation(s)
- Wenchao Wang
- The Education Ministry Key and International Joint Lab of Resource Chemistry, Shanghai Key Lab of Rare Earth Functional Materials , Shanghai Normal University , Shanghai 200234 , China
- Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong , China
| | - Xiaolong Zhao
- The Education Ministry Key and International Joint Lab of Resource Chemistry, Shanghai Key Lab of Rare Earth Functional Materials , Shanghai Normal University , Shanghai 200234 , China
| | - Yingnan Cao
- The Education Ministry Key and International Joint Lab of Resource Chemistry, Shanghai Key Lab of Rare Earth Functional Materials , Shanghai Normal University , Shanghai 200234 , China
| | - Zhiping Yan
- Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong , China
| | - Ruixue Zhu
- Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong , China
- School of Physical Science and Technology , Shanghai Tech University , Shanghai 201210 , China
| | - Ying Tao
- The Education Ministry Key and International Joint Lab of Resource Chemistry, Shanghai Key Lab of Rare Earth Functional Materials , Shanghai Normal University , Shanghai 200234 , China
| | - Xiaolang Chen
- The Education Ministry Key and International Joint Lab of Resource Chemistry, Shanghai Key Lab of Rare Earth Functional Materials , Shanghai Normal University , Shanghai 200234 , China
| | - Dieqing Zhang
- The Education Ministry Key and International Joint Lab of Resource Chemistry, Shanghai Key Lab of Rare Earth Functional Materials , Shanghai Normal University , Shanghai 200234 , China
| | - Guisheng Li
- The Education Ministry Key and International Joint Lab of Resource Chemistry, Shanghai Key Lab of Rare Earth Functional Materials , Shanghai Normal University , Shanghai 200234 , China
| | - David Lee Phillips
- Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong , China
| |
Collapse
|
69
|
David C. TiO 2 Self-Assembled, Thin-Walled Nanotube Arrays for Photonic Applications. MATERIALS 2019; 12:ma12081332. [PMID: 31022853 PMCID: PMC6515451 DOI: 10.3390/ma12081332] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Revised: 04/16/2019] [Accepted: 04/18/2019] [Indexed: 01/31/2023]
Abstract
Two-dimensional arrays of hollow nanotubes made of TiO 2 are a promising platform for sensing, spectroscopy and light harvesting applications. Their straightforward fabrication via electrochemical anodization, growing nanotube pillars of finite length from a Ti foil, allows precise tailoring of geometry and, thus, material properties. We theoretically investigate these photonic crystal structures with respect to reduction of front surface reflection, achievable field enhancement, and photonic bands. Employing the Rigorous Coupled Wave Analysis (RCWA), we study the optical response of photonic crystals made of thin-walled nanotubes relative to their bare Ti foil substrate, including under additional charge carrier doping which might occur during the growth process.
Collapse
Affiliation(s)
- Christin David
- Madrid Institute for Advanced Studies in Nanoscience (IMDEA Nanoscience), C/Faraday 9, 28049 Madrid, Spain.
| |
Collapse
|
70
|
Naraginti S, Yong YC. Enhanced detoxification of p-bromophenol by novel Zr/Ag-TiO 2@rGO ternary composite: Degradation kinetics and phytotoxicity evolution studies. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019; 170:355-362. [PMID: 30544096 DOI: 10.1016/j.ecoenv.2018.12.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Revised: 11/29/2018] [Accepted: 12/01/2018] [Indexed: 06/09/2023]
Abstract
The toxicity and persistence of the halogenated aromatics, particularly brominated phenolic compounds have drawn serious concerns to the environment, emphasizing the potential effects on human health and ecosystems balance. Advanced oxidation process (AOP) has received much attention as an alternative for the conventional wastewater treatment methods to treat water contaminated with toxic pollutants. This study investigated the degradation and detoxification of p-bromophenol (p-BP) by a novel Zr/Ag-TiO2@rGO photocatalyst under visible light. Upon 3 h of visible light irradiation over Zr/Ag-TiO2@rGO, more than 95% of p-BP (15 mg/L) degradation was achieved at a rate of 0.23 min-1. The degradation products were identified by GC-MS and possible degradation pathway was proposed. The phytotoxicity evolution of the degraded products was assessed on Vigna radiata (V. radiata), in which seeds treated with pure p-BP showed less germination (40%) compared to degradation products (100%). Furthermore, the germination index (GI) of p-BP was found to be 11.1% before degradation while it increased to 80.5% after 3 h of degradation indicated that this photodegradation process achieved detoxification of p-BP. Thus, this study demonstrated that p-BP elimination and detoxification could be simply achieved with Zr/Ag-TiO2@rGO nanocomposite under visible light irradiation, which provides new solution for wastewater treatment and water reuse in crop irrigation.
Collapse
Affiliation(s)
- Saraschandra Naraginti
- Biofuels Institute, School of the Environment, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, PR China
| | - Yang-Chun Yong
- Biofuels Institute, School of the Environment, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, PR China.
| |
Collapse
|
71
|
Zhao Z, Cao Y, Dong F, Wu F, Li B, Zhang Q, Zhou Y. The activation of oxygen through oxygen vacancies in BiOCl/PPy to inhibit toxic intermediates and enhance the activity of photocatalytic nitric oxide removal. NANOSCALE 2019; 11:6360-6367. [PMID: 30888389 DOI: 10.1039/c8nr10356a] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Photocatalysis is regarded as a promising technology for indoor air purification. Despite much effort, the inhibition of toxic intermediates and the promotion of nitric oxide (NO) oxidation activity still limit real applications due to catalyst design constraints. In order to circumvent this issue, oxygen vacancies were fabricated through a strong interaction between BiOCl and polypyrrole (PPy) based on computational predictions. Oxygen vacancies worked as sites to activate O2 molecules, and the relative barrier energies of NO oxidation were significantly reduced due to the O2 activation process. With the oxygen vacancy modification, the oxidizability of BiOCl was improved, and the generation of the superoxide radical (˙O2-) was promoted on BiOCl/PPy, while the hydroxyl radical (˙OH) remained unchanged under visible light irradiation. As a result, the efficiency of NO oxidation increased from 12% to 28%, while the NO2 production was inhibited completely. Finally, in situ diffuse reflectance infrared Fourier-transform spectroscopy (DRIFTS) investigations were conducted to shed light on the mechanism of the NO oxidation process. This work provides an in-depth understanding of the interaction between oxygen vacancies and O2 during the NO oxidation process, which offers a scheme to control the oxidation reaction.
Collapse
Affiliation(s)
- Ziyan Zhao
- State Key Laboratory of Oil and Gas Reservoir and Exploitation, Southwest Petroleum University, Chengdu 610500, China.
| | | | | | | | | | | | | |
Collapse
|
72
|
Oprea CI, Gîrțu MA. Structure and Electronic Properties of TiO₂ Nanoclusters and Dye⁻Nanocluster Systems Appropriate to Model Hybrid Photovoltaic or Photocatalytic Applications. NANOMATERIALS (BASEL, SWITZERLAND) 2019; 9:E357. [PMID: 30836631 PMCID: PMC6474027 DOI: 10.3390/nano9030357] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Revised: 02/18/2019] [Accepted: 02/20/2019] [Indexed: 01/30/2023]
Abstract
We report the results of a computational study of TiO₂ nanoclusters of various sizes as well as of complex systems with various molecules adsorbed onto the clusters to set the ground for the modeling of charge transfer processes in hybrid organic⁻inorganic photovoltaics or photocatalytic degradation of pollutants. Despite the large number of existing computational studies of TiO₂ clusters and in spite of the higher computing power of the typical available hardware, allowing for calculations of larger systems, there are still studies that use cluster sizes that are too small and not appropriate to address particular problems or certain complex systems relevant in photovoltaic or photocatalytic applications. By means of density functional theory (DFT) calculations, we attempt to find acceptable minimal sizes of the TinO2n+2H₄ (n = 14, 24, 34, 44, 54) nanoclusters in correlation with the size of the adsorbed molecule and the rigidity of the backbone of the molecule to model systems and interface processes that occur in hybrid photovoltaics and photocatalysis. We illustrate various adsorption cases with a small rigid molecule based on coumarin, a larger rigid oligomethine cyanine dye with indol groups, and the penicillin V antibiotic having a flexible backbone. We find that the use of the n = 14 cluster to describe adsorption leads to significant distortions of both the cluster and the molecule and to unusual tridentate binding configurations not seen for larger clusters. Moreover, the significantly weaker bonding as well as the differences in the density of states and in the optical spectra suggest that the n = 14 cluster is a poor choice for simulating the materials used in the practical applications envisaged here. As the n = 24 cluster has provided mixed results, we argue that cluster sizes larger than or equal to n = 34 are necessary to provide the reliability required by photovoltaic and photocatalytic applications. Furthermore, the tendency to saturate the key quantities of interest when moving from n = 44 to n = 54 suggests that the largest cluster may bring little improvement at a significantly higher computational cost.
Collapse
Affiliation(s)
- Corneliu I Oprea
- Department of Physics and Electronics, Ovidius University of Constanța, 900527 Constanța, Romania.
| | - Mihai A Gîrțu
- Department of Physics and Electronics, Ovidius University of Constanța, 900527 Constanța, Romania.
| |
Collapse
|
73
|
Li G, Huang J, Chen J, Deng Z, Huang Q, Liu Z, Guo W, Cao R. Highly Active Photocatalyst of Cu 2O/TiO 2 Octahedron for Hydrogen Generation. ACS OMEGA 2019; 4:3392-3397. [PMID: 31459554 PMCID: PMC6649128 DOI: 10.1021/acsomega.8b03404] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Accepted: 01/23/2019] [Indexed: 05/13/2023]
Abstract
Heterojunction catalysts are attracting attention in the field of photocatalytic hydrogen generation for their effective light utilization and charge separation personalities. In this work, we report a simple and low-cost two-step solvothermal method for synthesizing Cu2O/TiO2 heterojunction catalysts with an octahedral morphology and a mean particle size of about 30 nm. It is found that the introduction of Cu2O astonishingly enhances the photocatalytic performance of TiO2. Under the condition of methanol acting as a sacrificial agent, the heterojunction with 0.19% Cu species shows an optimal hydrogen generation rate of 24.83 mmol g-1 h-1, which is nearly 3 orders of magnitude higher than that of the pristine TiO2 catalyst.
Collapse
Affiliation(s)
- Guojing Li
- Key
Laboratory of Optoelectronic Materials Chemistry and Physics,
Fujian Institute of Research on the Structure of Matter, and State Key Laboratory
of Structural Chemistry, Fujian Institute of Research on the Structure
of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, People’s Republic
of China
- University
of the Chinese Academy of Sciences, Beijing 100039, People’s
Republic of China
| | - Jiquan Huang
- Key
Laboratory of Optoelectronic Materials Chemistry and Physics,
Fujian Institute of Research on the Structure of Matter, and State Key Laboratory
of Structural Chemistry, Fujian Institute of Research on the Structure
of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, People’s Republic
of China
- E-mail: .
Phone: +86-591-63179098. Fax: +86-591-83721039 (J.H.)
| | - Jian Chen
- Key
Laboratory of Optoelectronic Materials Chemistry and Physics,
Fujian Institute of Research on the Structure of Matter, and State Key Laboratory
of Structural Chemistry, Fujian Institute of Research on the Structure
of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, People’s Republic
of China
| | - Zhonghua Deng
- Key
Laboratory of Optoelectronic Materials Chemistry and Physics,
Fujian Institute of Research on the Structure of Matter, and State Key Laboratory
of Structural Chemistry, Fujian Institute of Research on the Structure
of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, People’s Republic
of China
| | - Qiufeng Huang
- Key
Laboratory of Optoelectronic Materials Chemistry and Physics,
Fujian Institute of Research on the Structure of Matter, and State Key Laboratory
of Structural Chemistry, Fujian Institute of Research on the Structure
of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, People’s Republic
of China
| | - Zhuguang Liu
- Key
Laboratory of Optoelectronic Materials Chemistry and Physics,
Fujian Institute of Research on the Structure of Matter, and State Key Laboratory
of Structural Chemistry, Fujian Institute of Research on the Structure
of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, People’s Republic
of China
| | - Wang Guo
- Key
Laboratory of Optoelectronic Materials Chemistry and Physics,
Fujian Institute of Research on the Structure of Matter, and State Key Laboratory
of Structural Chemistry, Fujian Institute of Research on the Structure
of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, People’s Republic
of China
- E-mail: . Phone: +86-591-63179098. Fax: +86-591-83721039 (W.G.)
| | - Rong Cao
- Key
Laboratory of Optoelectronic Materials Chemistry and Physics,
Fujian Institute of Research on the Structure of Matter, and State Key Laboratory
of Structural Chemistry, Fujian Institute of Research on the Structure
of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, People’s Republic
of China
- E-mail: . Phone: +86-591-63173698. Fax: +86-591-63173698 (R.C.)
| |
Collapse
|
74
|
Cuko A, Bromley ST, Calatayud M. Oxygen Vacancies in Oxide Nanoclusters: When Silica Is More Reducible Than Titania. Front Chem 2019; 7:37. [PMID: 30792977 PMCID: PMC6374336 DOI: 10.3389/fchem.2019.00037] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2018] [Accepted: 01/14/2019] [Indexed: 11/24/2022] Open
Abstract
Oxygen vacancies are related to specific optical, conductivity and magnetic properties in macroscopic SiO2 and TiO2 compounds. As such, the ease with which oxygen vacancies form often determines the application potential of these materials in many technological fields. However, little is known about the role of oxygen vacancies in nanosized materials. In this work we compute the energies to create oxygen vacancies in highly stable nanoclusters of (TiO2)N, (SiO2)N, and mixed (TixSi1-xO2)N for sizes between N = 2 and N = 24 units. Contrary to the results for bulk and surfaces, we predict that removing an oxygen atom from global minima silica clusters is energetically more favorable than from the respective titania species. This unexpected chemical behavior is clearly linked to the inherent presence of terminal unsaturated oxygens at these nanoscale systems. In order to fully characterize our findings, we provide an extensive set of descriptors (oxygen vacancy formation energy, electron localization, density of states, relaxation energy, and geometry) that can be used to compare our results with those for other compositions and sizes. Our results will help in the search of novel nanomaterials for technological and scientific applications such as heterogeneous catalysis, electronics, and cluster chemistry.
Collapse
Affiliation(s)
- Andi Cuko
- Departament de Ciència de Materials i Química Física, Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona, Barcelona, Spain
- CNRS, Laboratoire de Chimie Théorique, LCT, Sorbonne Université, Paris, France
| | - Stefan T. Bromley
- Departament de Ciència de Materials i Química Física, Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona, Barcelona, Spain
- Institució Catalana de Recerca i Estudis Avançats (ICREA), Barcelona, Spain
| | - Monica Calatayud
- CNRS, Laboratoire de Chimie Théorique, LCT, Sorbonne Université, Paris, France
| |
Collapse
|
75
|
Noman MT, Ashraf MA, Ali A. Synthesis and applications of nano-TiO 2: a review. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:3262-3291. [PMID: 30523526 DOI: 10.1007/s11356-018-3884-z] [Citation(s) in RCA: 119] [Impact Index Per Article: 23.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Accepted: 11/27/2018] [Indexed: 05/06/2023]
Abstract
TiO2-based nanomaterials have attracted prodigious attention as a photocatalysts in numerous fields of applications. In this thematic issue, the mechanism behind the photocatalytic activity of nano-TiO2 as well as the critical properties have been reviewed in details. The synthesis routes and the variables that affect the size and crystallinity of nano-TiO2 have also been discussed in detail. Moreover, a newly emerged class of color TiO2, TiO2 in aerogel form, nanotubes form, doped and undoped form, and other forms of TiO2 have been discussed in details. Photocatalytic and photovoltaic applications and the type of nano-TiO2 that is more suitable for these applications have been discussed in this review.
Collapse
Affiliation(s)
- Muhammad Tayyab Noman
- Department of Material Engineering, Technical University of Liberec, Liberec, Czech Republic.
| | - Muhammad Azeem Ashraf
- Department of Fibre and Textile Technology, University of Agriculture, Faisalabad, Pakistan
| | - Azam Ali
- Department of Material Engineering, Technical University of Liberec, Liberec, Czech Republic
| |
Collapse
|
76
|
Bai Q, Lavenas M, Vauriot L, Le Tréquesser Q, Hao J, Weill F, Delville JP, Delville MH. Hydrothermal Transformation of Titanate Scrolled Nanosheets to Anatase over a Wide pH Range and Contribution of Triethanolamine and Oleic Acid to Control the Morphology. Inorg Chem 2019; 58:2588-2598. [DOI: 10.1021/acs.inorgchem.8b03197] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Qingguo Bai
- ICMCB, CNRS, Université Bordeaux, UMR 5026, 33608 Pessac, France
- LOMA, Université Bordeaux, CNRS, UMR 5798, 33405 Talence, France
| | - Magali Lavenas
- ICMCB, CNRS, Université Bordeaux, UMR 5026, 33608 Pessac, France
| | - Laetitia Vauriot
- ICMCB, CNRS, Université Bordeaux, UMR 5026, 33608 Pessac, France
- LOMA, Université Bordeaux, CNRS, UMR 5798, 33405 Talence, France
| | | | - Junjie Hao
- ICMCB, CNRS, Université Bordeaux, UMR 5026, 33608 Pessac, France
- LOMA, Université Bordeaux, CNRS, UMR 5798, 33405 Talence, France
| | - Francois Weill
- ICMCB, CNRS, Université Bordeaux, UMR 5026, 33608 Pessac, France
| | | | | |
Collapse
|
77
|
Roy A, Mukhopadhyay S, Devi PS, Sundaram S. Polyaniline-Layered Rutile TiO 2 Nanorods as Alternative Photoanode in Dye-Sensitized Solar Cells. ACS OMEGA 2019; 4:1130-1138. [PMID: 31459388 PMCID: PMC6647995 DOI: 10.1021/acsomega.8b02628] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Accepted: 12/18/2018] [Indexed: 06/10/2023]
Abstract
In this paper, dye-sensitized solar cell (DSSC) performance of the less explored polymorph of TiO2, rutile, has been explored, and its performance has been modified with polyaniline (PANI) wrapping on the surface. For this purpose, highly crystalline rutile nanorods have been synthesized without any growth-directing substrates, employing a hydrothermal treatment. Further, to understand the phase composition and morphology, the synthesized nanorods and PANI-layered nanorods have been characterized through various physicochemical methods. The synthesized rods were implemented as photoanode material for DSSCs which exhibited a photoelectric conversion efficiency (PCE) of 4.28% with a high open-circuit voltage (V OC) of 0.84 V which is highly superior to DSSC with Degussa P25 (PCE = 3.95%) TiO2 nanoparticles. The resultant PCE of the nanorods was further enhanced to 6.23% on in situ deposition of PANI which acts as an electron-transporting layer. Introduction of conducting PANI over the rutile rod was explored as a new concept to improve the performance of photoanode material besides conventional TiCl4 treatment or scattering layer deposition.
Collapse
Affiliation(s)
- Anurag Roy
- Sensor
and Actuator Division, CSIR-Central Glass
and Ceramic Research Institute, Kolkata 700032, India
- Environment
and Sustainability Institute, University
of Exeter, Penryn, Cornwall TR10 9FE, United Kingdom
| | - Soumita Mukhopadhyay
- Sensor
and Actuator Division, CSIR-Central Glass
and Ceramic Research Institute, Kolkata 700032, India
| | | | - Senthilarasu Sundaram
- Environment
and Sustainability Institute, University
of Exeter, Penryn, Cornwall TR10 9FE, United Kingdom
| |
Collapse
|
78
|
Troian-Gautier L, Sampaio RN, Piechota EJ, Brady MD, Meyer GJ. Barriers for interfacial back-electron transfer: A comparison between TiO2 and SnO2/TiO2 core/shell structures. J Chem Phys 2019; 150:041719. [DOI: 10.1063/1.5054604] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Affiliation(s)
- Ludovic Troian-Gautier
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, USA
| | - Renato N. Sampaio
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, USA
| | - Eric J. Piechota
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, USA
| | - Matthew D. Brady
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, USA
| | - Gerald J. Meyer
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, USA
| |
Collapse
|
79
|
Titanium Dioxide (TiO2) Mesocrystals: Synthesis, Growth Mechanisms and Photocatalytic Properties. Catalysts 2019. [DOI: 10.3390/catal9010091] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Hierarchical TiO2 superstructures with desired architectures and intriguing physico-chemical properties are considered to be one of the most promising candidates for solving the serious issues related to global energy exhaustion as well as environmental deterioration via the well-known photocatalytic process. In particular, TiO2 mesocrystals, which are built from TiO2 nanocrystal building blocks in the same crystallographical orientation, have attracted intensive research interest in the area of photocatalysis owing to their distinctive structural properties such as high crystallinity, high specific surface area, and single-crystal-like nature. The deeper understanding of TiO2 mesocrystals-based photocatalysis is beneficial for developing new types of photocatalytic materials with multiple functionalities. In this paper, a comprehensive review of the recent advances toward fabricating and modifying TiO2 mesocrystals is provided, with special focus on the underlying mesocrystallization mechanism and controlling rules. The potential applications of as-synthesized TiO2 mesocrystals in photocatalysis are then discussed to shed light on the structure–performance relationships, thus guiding the development of highly efficient TiO2 mesocrystal-based photocatalysts for certain applications. Finally, the prospects of future research on TiO2 mesocrystals in photocatalysis are briefly highlighted.
Collapse
|
80
|
Hong X, Tan J, Zhu H, Feng N, Yang Y, Irvine JTS, Wang L, Liu G, Cheng HM. Control of Spatially Homogeneous Distribution of Heteroatoms to Produce Red TiO2
Photocatalyst for Visible-Light Photocatalytic Water Splitting. Chemistry 2019; 25:1787-1794. [DOI: 10.1002/chem.201805283] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Indexed: 01/18/2023]
Affiliation(s)
- Xingxing Hong
- Shenyang National Laboratory for Materials Science; Institute of Metal Research; Chinese Academy of Sciences; 72 Wenhua Road Shenyang 110016 P.R. China
- School of Materials Science and Engineering; University of Science and Technology of China; 72 Wenhua Road Shenyang 110016 P.R. China
| | - Jun Tan
- Shenyang National Laboratory for Materials Science; Institute of Metal Research; Chinese Academy of Sciences; 72 Wenhua Road Shenyang 110016 P.R. China
| | - Huaze Zhu
- Shenyang National Laboratory for Materials Science; Institute of Metal Research; Chinese Academy of Sciences; 72 Wenhua Road Shenyang 110016 P.R. China
| | - Ningdong Feng
- State Key Laboratory of Magnetic Resonance, and Atomic Molecular Physics; Wuhan Center for Magnetic Resonance; Key Laboratory of Magnetic Resonance in Biological Systems; Wuhan Institute of Physics and Mathematics; Chinese Academy of Sciences; Wuhan 430071 P.R. China
| | - Yongqiang Yang
- Shenyang National Laboratory for Materials Science; Institute of Metal Research; Chinese Academy of Sciences; 72 Wenhua Road Shenyang 110016 P.R. China
| | | | - Lianzhou Wang
- Nanomaterials Centre; School of Chemical Engineering and AIBN; The University of Queensland; St Lucia Brisbane QLD 4072 Australia
| | - Gang Liu
- Shenyang National Laboratory for Materials Science; Institute of Metal Research; Chinese Academy of Sciences; 72 Wenhua Road Shenyang 110016 P.R. China
- School of Materials Science and Engineering; University of Science and Technology of China; 72 Wenhua Road Shenyang 110016 P.R. China
| | - Hui-Ming Cheng
- Shenyang National Laboratory for Materials Science; Institute of Metal Research; Chinese Academy of Sciences; 72 Wenhua Road Shenyang 110016 P.R. China
- Tsinghua-Berkeley Shenzhen Institute; Tsinghua University; 1001 Xueyuan Road Shenzhen 518055 P.R. China
| |
Collapse
|
81
|
Sun S, Song P, Cui J, Liang S. Amorphous TiO2 nanostructures: synthesis, fundamental properties and photocatalytic applications. Catal Sci Technol 2019. [DOI: 10.1039/c9cy01020c] [Citation(s) in RCA: 66] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
In this review, we mainly highlight the advances made in the development of amorphous TiO2 nanostructures for photocatalysts. Some perspectives on the challenges and new direction are also discussed.
Collapse
Affiliation(s)
- Shaodong Sun
- Shaanxi Province Key Laboratory for Electrical Materials and Infiltration Technology
- School of Materials Science and Engineering
- Xi'an University of Technology
- Xi'an 710048
- People's Republic of China
| | - Peng Song
- Shaanxi Province Key Laboratory for Electrical Materials and Infiltration Technology
- School of Materials Science and Engineering
- Xi'an University of Technology
- Xi'an 710048
- People's Republic of China
| | - Jie Cui
- Shaanxi Province Key Laboratory for Electrical Materials and Infiltration Technology
- School of Materials Science and Engineering
- Xi'an University of Technology
- Xi'an 710048
- People's Republic of China
| | - Shuhua Liang
- Shaanxi Province Key Laboratory for Electrical Materials and Infiltration Technology
- School of Materials Science and Engineering
- Xi'an University of Technology
- Xi'an 710048
- People's Republic of China
| |
Collapse
|
82
|
Ren X, Yao J, Cai L, Li J, Cao X, Zhang Y, Wang B, Wei Y. Band gap engineering of BiOI via oxygen vacancies induced by graphene for improved photocatalysis. NEW J CHEM 2019. [DOI: 10.1039/c8nj05538f] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A reduced graphene oxide–bismuth iodide oxide (rGO–BiOI) composite was prepared by a thermal reduction method.
Collapse
Affiliation(s)
- Xuejun Ren
- National Demonstration Center for Experimental Chemistry Education College of Chemistry and Material Science
- Hebei Normal University
- Shijiazhuang
- P. R. China
| | - Jingwen Yao
- National Demonstration Center for Experimental Chemistry Education College of Chemistry and Material Science
- Hebei Normal University
- Shijiazhuang
- P. R. China
| | - Lei Cai
- National Demonstration Center for Experimental Chemistry Education College of Chemistry and Material Science
- Hebei Normal University
- Shijiazhuang
- P. R. China
| | - Jibiao Li
- National Demonstration Center for Experimental Chemistry Education College of Chemistry and Material Science
- Hebei Normal University
- Shijiazhuang
- P. R. China
| | - Xingzhong Cao
- Multi-discipline Research Division
- Institute of High Energy Physics
- Chinese Academy of Sciences
- Beijing 100049
- China
| | - Yanfeng Zhang
- National Demonstration Center for Experimental Chemistry Education College of Chemistry and Material Science
- Hebei Normal University
- Shijiazhuang
- P. R. China
| | - Baoyi Wang
- Multi-discipline Research Division
- Institute of High Energy Physics
- Chinese Academy of Sciences
- Beijing 100049
- China
| | - Yu Wei
- National Demonstration Center for Experimental Chemistry Education College of Chemistry and Material Science
- Hebei Normal University
- Shijiazhuang
- P. R. China
| |
Collapse
|
83
|
Fan X, Fu H, Zhang L, Zhang J. Pyrazole-thermal synthesis: a new approach towards N-rich titanium-oxo clusters with photochromic behaviors. Dalton Trans 2019; 48:8049-8052. [DOI: 10.1039/c9dt01628g] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Pyrazole-thermal synthesis has been developed for preparing N-rich titanium-oxo clusters with diverse photochromic behaviors.
Collapse
Affiliation(s)
- Xi Fan
- State Key Laboratory of Structural Chemistry
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou
- China
| | - Hao Fu
- State Key Laboratory of Structural Chemistry
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou
- China
| | - Lei Zhang
- State Key Laboratory of Structural Chemistry
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou
- China
| | - Jian Zhang
- State Key Laboratory of Structural Chemistry
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou
- China
| |
Collapse
|
84
|
|
85
|
Du Y, Wang Z, Chen H, Wang HY, Liu G, Weng Y. Effect of trap states on photocatalytic properties of boron-doped anatase TiO2 microspheres studied by time-resolved infrared spectroscopy. Phys Chem Chem Phys 2019; 21:4349-4358. [DOI: 10.1039/c8cp06109b] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The photocatalytic hydrogen and oxygen evolution switching effect in the water splitting of two boron-doped anatase TiO2 microspheres was elucidated from the viewpoint of trap states.
Collapse
Affiliation(s)
- Yijie Du
- The Key Laboratory of Soft Matter Physics, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences
- Beijing 100190
- China
- School of Physical Sciences, University of Chinese Academy of Sciences
- Beijing 100049
| | - Zhuan Wang
- The Key Laboratory of Soft Matter Physics, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences
- Beijing 100190
- China
| | - Hailong Chen
- The Key Laboratory of Soft Matter Physics, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences
- Beijing 100190
- China
| | - Hao-Yi Wang
- The Key Laboratory of Soft Matter Physics, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences
- Beijing 100190
- China
| | - Gang Liu
- Shenyang National Laboratory for Materials Science Institute of Metal Research, Chinese Academy of Sciences
- Shenyang 110016
- China
- School of Materials Science and Engineering, University of Science and Technology of China
- Shenyang 110016
| | - Yuxiang Weng
- The Key Laboratory of Soft Matter Physics, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences
- Beijing 100190
- China
- School of Physical Sciences, University of Chinese Academy of Sciences
- Beijing 100049
| |
Collapse
|
86
|
Xiang G, Tang Y, Liu Z, Zhu W, Liu H, Wang J, Zhong G, Li J, Wang X. Probing Ligand-Induced Cooperative Orbital Redistribution That Dominates Nanoscale Molecule-Surface Interactions with One-Unit-Thin TiO 2 Nanosheets. NANO LETTERS 2018; 18:7809-7815. [PMID: 30407013 DOI: 10.1021/acs.nanolett.8b03572] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Understanding the general electronic principles underlying molecule-surface interactions at the nanoscale is crucial for revealing the processes based on chemisorption, like catalysis, surface ligation, surface fluorescence, etc. However, the electronic mechanisms of how surface states affect and even dominate the properties of nanomaterials have long remained unclear. Here, using one-unit-thin TiO2 nanosheet as a model surface platform, we find that surface ligands can competitively polarize and confine the valence 3d orbitals of surface Ti atoms from delocalized energy band states to localized chemisorption bonds, through probing the surface chemical interaction at the orbital level with near-edge X-ray absorption fine structure (NEXAFS). Such ligand-induced orbital redistributions, which are revealed by combining experimental discoveries, quantum calculations, and theoretical analysis, are cooperative with ligand coverages and can enhance the strength of chemisorption and ligation-induced surface effects on nanomaterials. The model and concept of nanoscale cooperative chemisorption reveal the general physical principle that drives the coverage-dependent ligand-induced surface effects on regulating the electronic structures, surface activity, optical properties, and chemisorption strength of nanomaterials.
Collapse
Affiliation(s)
- Guolei Xiang
- State Key Laboratory of Chemical Resource Engineering, School of Science , Beijing University of Chemical Technology , Beijing , 100029 , P.R. China
| | - Yan Tang
- Department of Chemistry , Tsinghua University , Beijing , 100084 , P.R. China
| | - Zigeng Liu
- Forschungszentrum Jülich GmbH , Institute of Energy and Climate Research Fundamental Electrochemistry (IEK-9) , Jülich , 52425 , Germany
- Max-Planck-Institute for Chemical Energy Conversion , Stiftstrasse 34-36 , Mülheim an der Ruhr , D-45470 , Germany
| | - Wei Zhu
- Department of Chemistry , Tsinghua University , Beijing , 100084 , P.R. China
| | - Haitao Liu
- Department of Chemistry , University of Pittsburgh , Pittsburgh , Pennsylvania 15260 , United States
| | - Jiaou Wang
- Beijing Synchrotron Radiation Facility , Institute of High Energy Physics, Chinese Academy of Science , Beijing , 100049 , P.R. China
| | - Guiming Zhong
- Xiamen Institute of Rare Earth Materials, Chinese Academy of Sciences , Xiamen , Fujian 361021 , P.R. China
| | - Jun Li
- Department of Chemistry , Tsinghua University , Beijing , 100084 , P.R. China
| | - Xun Wang
- Department of Chemistry , Tsinghua University , Beijing , 100084 , P.R. China
| |
Collapse
|
87
|
Lu G, Bao L, Hu X, Liu X, Zhu W. Synthesis, spectroscopic characterization and photocatalytic properties of corrole modified GPTMS/TiO2 nanoparticles. INORG CHEM COMMUN 2018. [DOI: 10.1016/j.inoche.2018.10.011] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
|
88
|
Park SJ, Park JY, Yang HK, Moon BK, Oh J. Biocompatible sphere, square prism and hexagonal rod Gd2O3:Eu3+@SiO2 nanoparticles: The effect of morphology on multi-modal imaging. Colloids Surf B Biointerfaces 2018; 172:224-232. [DOI: 10.1016/j.colsurfb.2018.08.043] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Revised: 08/09/2018] [Accepted: 08/19/2018] [Indexed: 12/27/2022]
|
89
|
Behal J, Kaur V, Mrzygłód J, Hoffmann M, Janiak A, Kaur K, Khunt R. Synthesis and Characterization of Rod Like Nano-sized Cobaltammine Complexes as Textile Dyeing Agents. ChemistrySelect 2018. [DOI: 10.1002/slct.201802593] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Jagriti Behal
- Department of Chemistry (UGC &DST-FIST Sponsored); Saurashtra University; Rajkot−360005, Gujarat India
| | - Varinder Kaur
- Department of Chemistry; Guru Nanak Dev University; Amritsar- 143005
| | - Jakub Mrzygłód
- Department of Chemistry; Adam Mickiewicz University; 61-614 Poznan Poland
| | - Marcin Hoffmann
- Department of Chemistry; Adam Mickiewicz University; 61-614 Poznan Poland
| | - Agnieszka Janiak
- Department of Chemistry; Adam Mickiewicz University; 61-614 Poznan Poland
| | - Karanjeet Kaur
- Department of Chemistry; Guru Nanak Dev University; Amritsar- 143005
| | - Ranjan Khunt
- Department of Chemistry (UGC &DST-FIST Sponsored); Saurashtra University; Rajkot−360005, Gujarat India
| |
Collapse
|
90
|
Parnianchi F, Nazari M, Maleki J, Mohebi M. Combination of graphene and graphene oxide with metal and metal oxide nanoparticles in fabrication of electrochemical enzymatic biosensors. INTERNATIONAL NANO LETTERS 2018. [DOI: 10.1007/s40089-018-0253-3] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
|
91
|
Li X, Xie Q, Tian Z. A DFT study of electronic structures and optical properties of nickel, nitrogen doped rutile TiO2. Chem Phys Lett 2018. [DOI: 10.1016/j.cplett.2018.08.054] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
|
92
|
Zhu W, Chi M, Gao M, Wang C, Lu X. Controlled synthesis of titanium dioxide/molybdenum disulfide core-shell hybrid nanofibers with enhanced peroxidase-like activity for colorimetric detection of glutathione. J Colloid Interface Sci 2018; 528:410-418. [DOI: 10.1016/j.jcis.2018.05.068] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Revised: 05/19/2018] [Accepted: 05/21/2018] [Indexed: 10/16/2022]
|
93
|
Villanueva-Cab J, Olalde-Velasco P, Romero-Contreras A, Zhuo Z, Pan F, Rodil SE, Yang W, Pal U. Photocharging and Band Gap Narrowing Effects on the Performance of Plasmonic Photoelectrodes in Dye-Sensitized Solar Cells. ACS APPLIED MATERIALS & INTERFACES 2018; 10:31374-31383. [PMID: 30129358 DOI: 10.1021/acsami.8b10063] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The incorporation of plasmonic nanostructures in active electrodes has become one of the most attractive ways to enhance the photoconversion efficiency (PCE) of dye-sensitized solar cells (DSSCs). Although an enhancement of PCE because of the incorporation of plasmonic nanostructures of different sizes, either bare or coated, has been demonstrated, the fundamental mechanisms associated to such enhancement are still unclear. Besides, the photocurrent enhancement of plasmonic DSSCs is frequently associated to the strong surface plasmon resonance (SPR) absorption of metal nanoparticles. In this work, through oxygen K-edge soft X-ray absorption and emission spectroscopies of plasmonic electrodes and electrodynamical characterization of the fabricated cells, we demonstrate a band gap narrowing and photocharging effect on the plasmonic electrodes that definitely contribute to the PCE enhancement in plasmonic DSSCs. The incorporation of bare metal nanoparticles in active metal-oxide semiconductor electrodes such as TiO2 in optimum concentration causes an upward shift of its valence band edge, reducing its effective band gap energy and enhancing the short-circuit current of DSSCs. On the other hand, small perturbation-based stepped light-induced transient measurements of photovoltage and photocurrent of the operating DSSCs revealed an upward shift of quasi-Fermi level of photoelectrodes because of the photocharging effect induced by the incorporated metal nanoparticles. The upward shift of the quasi-Fermi level causes an increase in open-circuit voltage ( VOC), nullifying the effect of band gap reduction. The short-circuit photocurrent enhancement was controlled by the band gap narrowing, screening the SPR contribution. The results presented in this work not only clarify the contribution of SPR absorption in plasmonic DSSCs, but also highlight the importance of considering the corrections in the effective base voltage because of the quasi-Fermi level band shift during the estimation of the transport and recombination parameters of an assembled DSSC.
Collapse
Affiliation(s)
- Julio Villanueva-Cab
- Instituto de Física , Benemérita Universidad Autónoma de Puebla , Apdo. Postal J-48 , Puebla , Puebla 72570 , Mexico
| | - Paul Olalde-Velasco
- Instituto de Física , Benemérita Universidad Autónoma de Puebla , Apdo. Postal J-48 , Puebla , Puebla 72570 , Mexico
| | - Alfredo Romero-Contreras
- Instituto de Física , Benemérita Universidad Autónoma de Puebla , Apdo. Postal J-48 , Puebla , Puebla 72570 , Mexico
| | - Zengqing Zhuo
- Advanced Light Source , Lawrence Berkeley National Laboratory , 1 Cyclotron Road , Berkeley , California 94720 , United States
- School of Advanced Materials , Peking University, Shenzhen Graduate School , Shenzhen 518055 , People's Republic of China
| | - Feng Pan
- School of Advanced Materials , Peking University, Shenzhen Graduate School , Shenzhen 518055 , People's Republic of China
| | - Sandra E Rodil
- Instituto de Investigaciones en Materiales , Universidad Nacional Autónoma de México , Mexico City 04510 , Mexico
| | - Wanli Yang
- Advanced Light Source , Lawrence Berkeley National Laboratory , 1 Cyclotron Road , Berkeley , California 94720 , United States
| | - Umapada Pal
- Instituto de Física , Benemérita Universidad Autónoma de Puebla , Apdo. Postal J-48 , Puebla , Puebla 72570 , Mexico
| |
Collapse
|
94
|
Soussi K, Mishra S, Jeanneau E, Mantoux A, Daniele S. Synthesis, characterization and thermal transport properties of heteroleptic N-alkyl triazenide complexes of titanium(IV) and niobium(V). Polyhedron 2018. [DOI: 10.1016/j.poly.2018.06.023] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
|
95
|
Tan B, Ye X, Li Y, Ma X, Wang Y, Ye J. Defective Anatase TiO 2-x Mesocrystal Growth In Situ on g-C 3 N 4 Nanosheets: Construction of 3D/2D Z-Scheme Heterostructures for Highly Efficient Visible-Light Photocatalysis. Chemistry 2018; 24:13311-13321. [PMID: 29957872 DOI: 10.1002/chem.201802366] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2018] [Revised: 06/14/2018] [Indexed: 11/09/2022]
Abstract
Environmental remediation by employing visible-light-active semiconductor heterostructures provides effective solutions for handling emerging contaminants by a much greener and lower cost approach compared with other methods. This report demonstrates that the in situ growth of nanosized single-crystal-like defective anatase TiO2-x mesocrystals (DTMCs) on g-C3 N4 nanosheets (NSs) can produce a 3D/2D DTMC/g-C3 N4 NS heterostructure with the two components held together by chemical bonds to form tight interfaces. This nanostructured heterostructure displayed remarkably improved photocatalytic activity toward the removal of the model pollutants Methyl Orange (MO) and CrVI under visible-light irradiation in comparison with the pristine DTMC and g-C3 N4 NS components, which suggests that both the oxidation and reduction abilities of the DTMC/g-C3 N4 NSs were simultaneously enhanced after fabrication. On the basis of the results of a systematic characterization, a reasonable mechanism for the photocatalytic activity based on a direct Z-scheme heterojunction is proposed and further verified by the measurement of . OH. This novel Z-scheme heterojunction endows the heterostructure with improved photogenerated electron/hole pair separation and a strong redox ability for the efficient degradation of wastewater pollutants. This work will be useful for the design and fabrication of direct Z-scheme heterostructured photocatalysts with novel architectures for applications in energy conversion and environmental remediation.
Collapse
Affiliation(s)
- Biying Tan
- Department of Chemistry, College of Science, Huazhong Agricultural University, No. 1 Shizishan Street, Wuhan, 430070, P. R. China
| | - Xiaozhou Ye
- Department of Chemistry, College of Science, Huazhong Agricultural University, No. 1 Shizishan Street, Wuhan, 430070, P. R. China
| | - Yongjun Li
- Department of Chemistry, College of Science, Huazhong Agricultural University, No. 1 Shizishan Street, Wuhan, 430070, P. R. China
| | - Xiaoqi Ma
- Department of Chemistry, College of Science, Huazhong Agricultural University, No. 1 Shizishan Street, Wuhan, 430070, P. R. China
| | - Yun Wang
- Department of Chemistry, College of Science, Huazhong Agricultural University, No. 1 Shizishan Street, Wuhan, 430070, P. R. China
| | - Jianfeng Ye
- Department of Chemistry, College of Science, Huazhong Agricultural University, No. 1 Shizishan Street, Wuhan, 430070, P. R. China
| |
Collapse
|
96
|
Influence of nitrogen species on the porous-alumina-assisted growth of TiO2 nanocolumn arrays. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2018.05.197] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
97
|
Xiong T, Wang H, Zhou Y, Sun Y, Cen W, Huang H, Zhang Y, Dong F. KCl-mediated dual electronic channels in layered g-C 3N 4 for enhanced visible light photocatalytic NO removal. NANOSCALE 2018; 10:8066-8074. [PMID: 29671458 DOI: 10.1039/c8nr01433g] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Limited by relatively fast charge carrier recombination, the performance of g-C3N4 photocatalysts is still far below what is expected. Herein, we tackle this challenge by introducing K and Cl ions into the interlayer of graphitic carbon nitride (KCl-doped g-C3N4). It is found that K and Cl ions coexisting in g-C3N4 could function as a dual channel for electron and hole transfer, respectively. As-prepared KCl-doped g-C3N4 shows a narrow bandgap, positive-shifted valence band edge and lower barriers for charge transfer between layers. Under visible light irradiation, the electrons created in the g-C3N4 layer are transferred by K ions, while the holes are transferred via Cl ions to induce photocatalysis. As expected, the enhanced visible light absorption, strong oxidization ability of the valence band holes and the prolonged lifetime of the charge carriers benefiting from the dual electronic channel endow KCl-doped g-C3N4 with a superior photocatalytic performance for NOx removal, exceeding the performances of both bare g-C3N4 and K doped g-C3N4. An in situ DRIFTS investigation reveals the reaction mechanism of the photocatalytic NO oxidation. The perspective of the dual channel for charge transfer could present a new design concept to effectively steer the efficiency of photocatalysts.
Collapse
Affiliation(s)
- Ting Xiong
- Chongqing Key Laboratory of Catalysis and New Environmental Materials, College of Environment and Resources, Chongqing Technology and Business University, Chongqing 400067, China.
| | | | | | | | | | | | | | | |
Collapse
|
98
|
Zhang G, Cai L, Zhang Y, Wei Y. Bi
5+
, Bi
(3−
x
)+
, and Oxygen Vacancy Induced BiOCl
x
I
1−
x
Solid Solution toward Promoting Visible‐Light Driven Photocatalytic Activity. Chemistry 2018; 24:7434-7444. [DOI: 10.1002/chem.201706164] [Citation(s) in RCA: 80] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2017] [Revised: 02/05/2018] [Indexed: 11/07/2022]
Affiliation(s)
- Guoqiang Zhang
- National Demonstration Center for Experimental Chemistry EducationCollege of Chemistry and Material ScienceHebei Normal University Shijiazhuang 050024 P. R. China
| | - Lei Cai
- National Demonstration Center for Experimental Chemistry EducationCollege of Chemistry and Material ScienceHebei Normal University Shijiazhuang 050024 P. R. China
| | - Yanfeng Zhang
- National Demonstration Center for Experimental Chemistry EducationCollege of Chemistry and Material ScienceHebei Normal University Shijiazhuang 050024 P. R. China
| | - Yu Wei
- National Demonstration Center for Experimental Chemistry EducationCollege of Chemistry and Material ScienceHebei Normal University Shijiazhuang 050024 P. R. China
| |
Collapse
|
99
|
Guo Q, Zhou C, Ma Z, Ren Z, Fan H, Yang X. Elementary Chemical Reactions in Surface Photocatalysis. Annu Rev Phys Chem 2018; 69:451-472. [DOI: 10.1146/annurev-physchem-052516-044933] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Qing Guo
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Dalian 116023, Liaoning, China;, , , , ,
| | - Chuanyao Zhou
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Dalian 116023, Liaoning, China;, , , , ,
| | - Zhibo Ma
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Dalian 116023, Liaoning, China;, , , , ,
| | - Zefeng Ren
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Dalian 116023, Liaoning, China;, , , , ,
| | - Hongjun Fan
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Dalian 116023, Liaoning, China;, , , , ,
| | - Xueming Yang
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Dalian 116023, Liaoning, China;, , , , ,
| |
Collapse
|
100
|
Yu Z, Chen XQ, Kang X, Xie Y, Zhu H, Wang S, Ullah S, Ma H, Wang L, Liu G, Ma X, Cheng HM. Noninvasively Modifying Band Structures of Wide-Bandgap Metal Oxides to Boost Photocatalytic Activity. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:e1706259. [PMID: 29457289 DOI: 10.1002/adma.201706259] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2017] [Revised: 12/19/2017] [Indexed: 06/08/2023]
Abstract
Although doping with appropriate heteroatoms is a powerful way of increasing visible light absorption of wide-bandgap metal oxide photocatalysts, the incorporation of heteroatoms into the photocatalysts usually leads to the increase of deleterious recombination centers of photogenerated charge carriers. Here, a conceptual strategy of increasing visible light absorption without causing additional recombination centers by constructing an ultrathin insulating heterolayer of amorphous boron oxynitride on wide-bandgap photocatalysts is shown. The nature of this strategy is that the active composition nitrogen in the heterolayer can noninvasively modify the electronic structure of metal oxides for visible light absorption through the interface contact between the heterolayer and metal oxides. The photocatalysts developed show significant improvements in photocatalytic activity under both UV-vis and visible light irradiation compared to the doped counterparts by conventional doping process. These results may provide opportunities for flexibly tailoring the electronic structure of metal oxides.
Collapse
Affiliation(s)
- Zongbao Yu
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang, 110016, China
| | - Xing-Qiu Chen
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang, 110016, China
| | - Xiangdong Kang
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang, 110016, China
| | - Yingpeng Xie
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang, 110016, China
| | - Huaze Zhu
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang, 110016, China
| | - Shoulong Wang
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang, 110016, China
| | - Sami Ullah
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang, 110016, China
| | - Hui Ma
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang, 110016, China
| | - Lianzhou Wang
- Nanomaterials Centre, School of Chemical Engineering and AIBN, The University of Queensland, St Lucia, Brisbane, QLD, 4072, Australia
| | - Gang Liu
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang, 110016, China
- School of Materials Science and Engineering, University of Science and Technology of China, 72 Wenhua Road, Shenyang, 110016, China
| | - Xiuliang Ma
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang, 110016, China
| | - Hui-Ming Cheng
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang, 110016, China
- Low-Dimensional Material and Device Laboratory, Tsinghua-Berkeley Shenzhen Institute, Tsinghua University, 1001 Xueyuan Road, Shenzhen, 518055, China
- Center of Excellence in Environmental Studies, King Abdulaziz University, Jeddah, 21589, Saudi Arabia
| |
Collapse
|