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Zhang P, Li N, Li L, Yu Y, Tuerhong R, Su X, Zhang B, Han L, Han Y. g-C 3N 4-Based Photocatalytic Materials for Converting CO 2 Into Energy: A Review. Chemphyschem 2024; 25:e202400075. [PMID: 38822681 DOI: 10.1002/cphc.202400075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Revised: 04/23/2024] [Accepted: 05/22/2024] [Indexed: 06/03/2024]
Abstract
Environmental pollution management and renewable energy development are humanity's biggest issues in the 21st century. The rise in atmospheric CO2, which has surpassed 400 parts per million, has stimulated research on CO2 reduction and conversion methods. Presently, photocatalytic conversion of CO2 to valuable hydrocarbons enables the transformation of solar energy into chemical energy and offers a novel avenue for energy conversion while regulating the greenhouse effect. This is an ideal strategy for simultaneously addressing environmental issues and the energy crisis. Photocatalysts are essential to photocatalytic processes. Photocatalyst is the core of photocatalytic technology, and graphite carbon nitride (g-C3N4) has attracted much attention because of its nonmetallic characteristics, and it has the characteristics of low cost, tunable electronic structure, easy manufacture and strong reducibility. However, its activity is not only affected by external reaction conditions, but also by the band gap structure, physical and chemical stability, surface morphology and specific surface area of the photocatalyst it. In this paper, the application progress of g-C3N4-based photocatalytic materials in CO2 reduction is reviewed, and the modification strategies of g-C3N4-based catalysts to obtain better catalytic efficiency and selectivity in CO2 photocatalytic reduction are summarized, and the future development of this material is prospected.
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Affiliation(s)
- Ping Zhang
- Key Laboratory of Environment-Friendly Composite Materials of the State Ethnic Affairs Commission, Gansu Provincial Biomass Function Composites Engineering Research Center, Key Laboratory for Utility of Environment-Friendly Composite Materials and Biomass in University of Gansu Province, College of Chemical Engineering, Northwest Minzu University, Lanzhou, 730030, P.R.China
| | - Ning Li
- Key Laboratory of Environment-Friendly Composite Materials of the State Ethnic Affairs Commission, Gansu Provincial Biomass Function Composites Engineering Research Center, Key Laboratory for Utility of Environment-Friendly Composite Materials and Biomass in University of Gansu Province, College of Chemical Engineering, Northwest Minzu University, Lanzhou, 730030, P.R.China
| | - Longjian Li
- Key Laboratory of Environment-Friendly Composite Materials of the State Ethnic Affairs Commission, Gansu Provincial Biomass Function Composites Engineering Research Center, Key Laboratory for Utility of Environment-Friendly Composite Materials and Biomass in University of Gansu Province, College of Chemical Engineering, Northwest Minzu University, Lanzhou, 730030, P.R.China
| | - Yongchong Yu
- Key Laboratory of Environment-Friendly Composite Materials of the State Ethnic Affairs Commission, Gansu Provincial Biomass Function Composites Engineering Research Center, Key Laboratory for Utility of Environment-Friendly Composite Materials and Biomass in University of Gansu Province, College of Chemical Engineering, Northwest Minzu University, Lanzhou, 730030, P.R.China
| | - Reyila Tuerhong
- Key Laboratory of Environment-Friendly Composite Materials of the State Ethnic Affairs Commission, Gansu Provincial Biomass Function Composites Engineering Research Center, Key Laboratory for Utility of Environment-Friendly Composite Materials and Biomass in University of Gansu Province, College of Chemical Engineering, Northwest Minzu University, Lanzhou, 730030, P.R.China
| | - Xiaoping Su
- Key Laboratory of Environment-Friendly Composite Materials of the State Ethnic Affairs Commission, Gansu Provincial Biomass Function Composites Engineering Research Center, Key Laboratory for Utility of Environment-Friendly Composite Materials and Biomass in University of Gansu Province, College of Chemical Engineering, Northwest Minzu University, Lanzhou, 730030, P.R.China
| | - Bin Zhang
- Key Laboratory of Environment-Friendly Composite Materials of the State Ethnic Affairs Commission, Gansu Provincial Biomass Function Composites Engineering Research Center, Key Laboratory for Utility of Environment-Friendly Composite Materials and Biomass in University of Gansu Province, College of Chemical Engineering, Northwest Minzu University, Lanzhou, 730030, P.R.China
| | - Lijuan Han
- Gansu Natural Energy Institute, Gansu Academy of Science, Lanzhou, 730046, P.R.China
| | - Yuqi Han
- College of Chemistry and Chemical Engineering, He Xi University, No.846 North Circle Road, Zhangye, 734000, P.R.China
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Chaudhary M, Singh P, Singh GP, Rathi B. Structural Features of Carbon Dots and Their Agricultural Potential. ACS OMEGA 2024; 9:4166-4185. [PMID: 38313515 PMCID: PMC10831853 DOI: 10.1021/acsomega.3c04638] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Revised: 11/22/2023] [Accepted: 11/23/2023] [Indexed: 02/06/2024]
Abstract
Carbon dots (CDs) have drawn attention due to their enticing physical, chemical, and surface properties. Besides, good conductivity, low toxicity, environmental friendliness, simple synthetic routes, and comparable optical properties are advantageous features of CDs. Further, recently, CDs have been explored for biological systems, including plants. Among biological systems, only plants form the basis for sustainability and life on Earth. In this Review, we reviewed suitable properties and applications of CDs, such as promoting the growth of agricultural plants, disease resistance, stress tolerance, and target transportation. Summing up the available studies, we believe that the applications of CDs are yet to be explored significantly for innovation and technology-based agriculture.
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Affiliation(s)
- Monika Chaudhary
- Department
of Chemistry, Hansraj College, University
of Delhi, Delhi 110007, India
| | - Priyamvada Singh
- Department
of Chemistry, Miranda House, University
of Delhi, Delhi 110007, India
| | - Gajendra Pratap Singh
- Disruptive
and Sustainable Technologies for Agricultural Precision, Singapore-MIT Alliance for Research and Technology
(SMART), 138602 Singapore
| | - Brijesh Rathi
- Department
of Chemistry, Hansraj College, University
of Delhi, Delhi 110007, India
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3
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Song X, He J, Wang Y, Wang J, Zhang S. A novel MIL-125(Ti)-based nanocomposite for enhanced adsorption and catalytic degradation of tetracycline hydrochloride: Synergetic mechanism of calcination and the nitrogen-containing reticulated surface layer. J Colloid Interface Sci 2023; 645:918-932. [PMID: 37178568 DOI: 10.1016/j.jcis.2023.05.028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Revised: 05/03/2023] [Accepted: 05/04/2023] [Indexed: 05/15/2023]
Abstract
A multi-nitrogen conjugated organic molecule (TPE-2Py) was selected to surface modify the calcined MIL-125(Ti) to prepare a nanocomposite (TPE-2Py@DSMIL-125(Ti)) for adsorption and photodegradation of organic pollutant (tetracycline hydrochloride) under visible light. A novel reticulated surface layer was formed on the nanocomposite, and the adsorption capacity of TPE-2Py@DSMIL-125(Ti) for tetracycline hydrochloride can reach 157.7 mg/g under neutral conditions, which is higher than that of most other reported materials. Kinetic and thermodynamic studies show that the adsorption is a spontaneous heat absorption process, dominated by chemisorption, in which electrostatic interaction, π-π conjugation and Ti-N covalent bonds played dominant roles. The photocatalytic study shows that the visible photo-degradation efficiency of TPE-2Py@DSMIL-125(Ti) for tetracycline hydrochloride can further reach 89.1% after adsorption. Mechanism studies reveal that •O2- and h+ play a major role in the degradation process, and the separation and transfer rate of photo-generated carriers increase, improving its visible photocatalytic performance. This study revealed the relationship between the adsorption/photocatalytic properties of the nanocomposite and the structure of the molecular as well as the calcination, providing a convenient strategy to regulate the removal efficiency of MOFs materials towards organic pollutants. Furthermore, TPE-2Py@DSMIL-125(Ti) exhibits good reusability and even better removal efficiency for tetracycline hydrochloride in real water samples, indicating its sustainable treatment of pollutants in contaminated water.
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Affiliation(s)
- Xiaoli Song
- College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, PR China.
| | - Jialing He
- College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, PR China
| | - Yu Wang
- College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, PR China
| | - Junlong Wang
- College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, PR China
| | - Shuwei Zhang
- College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, PR China.
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4
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Huang S, Song Y, Zhang JR, Chen X, Zhu JJ. Antibacterial Carbon Dots-Based Composites. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023:e2207385. [PMID: 36799145 DOI: 10.1002/smll.202207385] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2022] [Revised: 01/20/2023] [Indexed: 06/18/2023]
Abstract
The emergence and global spread of bacterial resistance to conventionally used antibiotics have highlighted the urgent need for new antimicrobial agents that might replace antibiotics. Currently, nanomaterials hold considerable promise as antimicrobial agents in anti-inflammatory therapy. Due to their distinctive functional physicochemical characteristics and exceptional biocompatibility, carbon dots (CDs)-based composites have attracted a lot of attention in the context of these antimicrobial nanomaterials. Here, a thorough assessment of current developments in the field of antimicrobial CDs-based composites is provided, starting with a brief explanation of the general synthesis procedures, categorization, and physicochemical characteristics of CDs-based composites. The many processes driving the antibacterial action of these composites are then thoroughly described, including physical destruction, oxidative stress, and the incorporation of antimicrobial agents. Finally, the obstacles that CDs-based composites now suffer in combating infectious diseases are outlined and investigated, along with the potential applications of antimicrobial CDs-based composites.
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Affiliation(s)
- Shan Huang
- School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing, 211816, P. R. China
| | - Yuexin Song
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, P. R. China
| | - Jian-Rong Zhang
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, P. R. China
| | - Xiaojun Chen
- School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing, 211816, P. R. China
| | - Jun-Jie Zhu
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, P. R. China
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Xiao H, He J, Lu X, Wang F, Guo Y. Bandgap-engineered ferroelectric single-crystalline NBT-BT based nanocomposites with excellent visible light-ultrasound catalytic performance. CHEMOSPHERE 2022; 306:135543. [PMID: 35780980 DOI: 10.1016/j.chemosphere.2022.135543] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Revised: 06/07/2022] [Accepted: 06/26/2022] [Indexed: 06/15/2023]
Abstract
Bandgap engineered ferroelectrics exhibit encouraging multi-energy catalytic performance by coupling the piezoelectricity and photoexcitation, which shows immense potential for environmental remediation and fuel production. However, it is challenging to prepare nano single-crystalline ferroelectric piezo-photoelectric with strong visible light absorption ability. Here, Ni mediated NBT-BT(NBT-BNT) single-crystalline nanocubes around 100 nm with considerable visible light absorption were synthesized by a high-temperature hydrothermal method. The mechanism of Ni2+ on the formation of NBT-BT nanocubes was proposed. The catalytic efficiency of NBT-BNT nanocubes is enhanced by decorating carbon quantum dots (CQDs). The RhB can be degraded within 8 min and the hydrogen production rate reaches up to ∼350 μmol g-1h-1 under visible light-ultrasonic condition. Moreover, under the simulated sunlight-ultrasound condition, RhB can be degraded within merely 3 min and a high H2 production rate of ∼747 μmol g-1h-1 is achieved. This work presents a paradigm for preparing ferroelectric single-crystalline nanocatalysts for multi-energy catalytic application.
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Affiliation(s)
- Hongyuan Xiao
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Jiahuan He
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Xunyu Lu
- School of Chemical Engineering, The University of New South Wales, Sydney, NSW, 2052, Australia
| | - Feifei Wang
- Key Laboratory of Optoelectronic Materials and Device, Department of Physics, Shanghai Normal University, Shanghai, 200234, China
| | - Yiping Guo
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering Shanghai Jiao Tong University, Shanghai, 200240, China.
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Ye KH, Tang T, Liang Z, Ji H, Lin Z, Yang S. Recent progress of bismuth vanadate-based photoelectrocatalytic water splitting. CHINESE SCIENCE BULLETIN-CHINESE 2022. [DOI: 10.1360/tb-2021-0238] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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Zhou Y, Luo X, Yang J, Qiu Q, Xie T, Liang T. Application of Quantum Dot Interface Modification Layer in Perovskite Solar Cells: Progress and Perspectives. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:2102. [PMID: 35745441 PMCID: PMC9228081 DOI: 10.3390/nano12122102] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Revised: 06/03/2022] [Accepted: 06/13/2022] [Indexed: 02/04/2023]
Abstract
Perovskite solar cells (PSCs) are currently attracting a great deal of attention for their excellent photovoltaic properties, with a maximum photoelectric conversion efficiency (PCE) of 25.5%, comparable to that of silicon-based solar cells. However, PSCs suffer from energy level mismatch, a large number of defects in perovskite films, and easy decomposition under ultraviolet (UV) light, which greatly limit the industrial application of PSCs. Currently, quantum dot (QD) materials are widely used in PSCs due to their properties, such as quantum size effect and multi-exciton effect. In this review, we detail the application of QDs as an interfacial layer to PSCs to optimize the energy level alignment between two adjacent layers, facilitate charge and hole transport, and also effectively assist in the crystallization of perovskite films and passivate defects on the film surface.
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Affiliation(s)
- Yankai Zhou
- Engineering Research Center for Hydrogen Energy Materials and Devices, College of Rare Earths, Jiangxi University of Science and Technology, 86 Hong Qi Road, Ganzhou 341000, China; (Y.Z.); (J.Y.); (T.L.)
- Faculty of Materials Metallurgy and Chemistry, Jiangxi University of Science and Technology, 86 Hong Qi Road, Ganzhou 341000, China;
| | - Xingrui Luo
- Faculty of Materials Metallurgy and Chemistry, Jiangxi University of Science and Technology, 86 Hong Qi Road, Ganzhou 341000, China;
| | - Jiayan Yang
- Engineering Research Center for Hydrogen Energy Materials and Devices, College of Rare Earths, Jiangxi University of Science and Technology, 86 Hong Qi Road, Ganzhou 341000, China; (Y.Z.); (J.Y.); (T.L.)
- Faculty of Materials Metallurgy and Chemistry, Jiangxi University of Science and Technology, 86 Hong Qi Road, Ganzhou 341000, China;
| | - Qingqing Qiu
- Engineering Research Center for Hydrogen Energy Materials and Devices, College of Rare Earths, Jiangxi University of Science and Technology, 86 Hong Qi Road, Ganzhou 341000, China; (Y.Z.); (J.Y.); (T.L.)
| | - Tengfeng Xie
- College of Chemistry, Jilin University, Changchun 130012, China;
| | - Tongxiang Liang
- Engineering Research Center for Hydrogen Energy Materials and Devices, College of Rare Earths, Jiangxi University of Science and Technology, 86 Hong Qi Road, Ganzhou 341000, China; (Y.Z.); (J.Y.); (T.L.)
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8
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Moscow S, Kavinkumar V, Sriramkumar M, Kalaikathir SPR, Jothivenkatachalam K, Fu Y, Anandan S. Synthesis of Sn and Zr‐Doped BiVO
4
Nanocatalyst with Enhanced Photocatalytic and Photoelectrochemical Activity. ChemistrySelect 2022. [DOI: 10.1002/slct.202104000] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Subramanian Moscow
- Department of Chemistry Materials Research Laboratory for Energy and Environmental Applications Anna University- BIT Campus Tiruchirappalli 620 024 Tamilnadu India
| | - Veerappan Kavinkumar
- Department of Chemistry Materials Research Laboratory for Energy and Environmental Applications Anna University- BIT Campus Tiruchirappalli 620 024 Tamilnadu India
| | - Masilamani Sriramkumar
- Department of Chemistry Materials Research Laboratory for Energy and Environmental Applications Anna University- BIT Campus Tiruchirappalli 620 024 Tamilnadu India
| | | | - Kandasamy Jothivenkatachalam
- Department of Chemistry Materials Research Laboratory for Energy and Environmental Applications Anna University- BIT Campus Tiruchirappalli 620 024 Tamilnadu India
| | - Yen‐Pei Fu
- Department of Materials Science and Engineering National Dong Hwa University, Shou-Feng Hualien 97401 Taiwan
| | - Srinivasan Anandan
- Center for Nano-materials,International Advanced Research Centre for Powder Metallurgy & New Materials (ARCI) Bolapur (P.O.) Hyderabad 500 005 Andhra Pradesh India
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9
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Wen Y, Wang Z, Cai Y, Song M, Qi K, Xie X. S-scheme BiVO 4/CQDs/β-FeOOH photocatalyst for efficient degradation of ofloxacin: Reactive oxygen species transformation mechanism insight. CHEMOSPHERE 2022; 295:133784. [PMID: 35114255 DOI: 10.1016/j.chemosphere.2022.133784] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Revised: 01/13/2022] [Accepted: 01/26/2022] [Indexed: 06/14/2023]
Abstract
Photocatalysis technology exhibited promising application for advanced treatment of wastewater. Nevertheless, the design of efficient photocatalyst and the mechanism of free radicals in pollutant degradation still remained to be further investigated. Herein, BiVO4/CQDs/β-FeOOH photocatalyst was fabricated by electrostatic self-assembly method, which exhibited the excellent photocatalytic performance. Under visible-light irradiation, the removal rate of ofloxacin by BiVO4/CQDs/β-FeOOH (0.25 min-1) was 1.93 times than pristine BiVO4, and the removal efficiency in 15 min reached 99.21%. The perfect reusability of BiVO4/CQDs/β-FeOOH was ascribed to the persistent catalytic active centers provided by the renewable surface oxygen vacancies on the β-FeOOH. As electron transfer channels, CQDs facilitated the transfer of BiVO4 photogeneration electrons. The matched band structure allowed the construction of S-scheme heterojunctions, and the higher conduction band position was retained while the carrier separation was promoted. More importantly, this work firstly reported the phenomenon that the main reactive groups in the photocatalysis process would be directionally transformed with the change of pH conditions. Based on the analysis of capture and electron paramagnetic resonance experiments, ·O2- was the main free radicals to photodegrade OFL in neutral and alkaline conditions. However, when the solution pH turned into acidic, the photodegradation of OFL was dominated by 1O2. This innovative phenomenon was due to that acidic condition accelerated the reaction kinetics of spontaneous transformation of ·O2- to 1O2 and inhibited the direct oxidation of pollutants by ·O2-. Accordingly, this research could inspire theoretical study of free radical reaction and the design of S-scheme heterojunction photocatalysts.
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Affiliation(s)
- Yuan Wen
- College of Earth and Environmental Sciences, Lanzhou University, Lanzhou, 730000, China; Key Laboratory for Environmental Pollution Prediction and Control, Gansu Province, China
| | - Zhaowei Wang
- College of Earth and Environmental Sciences, Lanzhou University, Lanzhou, 730000, China; Key Laboratory for Environmental Pollution Prediction and Control, Gansu Province, China.
| | - Yonghui Cai
- College of Earth and Environmental Sciences, Lanzhou University, Lanzhou, 730000, China; Key Laboratory for Environmental Pollution Prediction and Control, Gansu Province, China
| | - Mengxi Song
- College of Earth and Environmental Sciences, Lanzhou University, Lanzhou, 730000, China; Key Laboratory for Environmental Pollution Prediction and Control, Gansu Province, China
| | - Kemin Qi
- College of Earth and Environmental Sciences, Lanzhou University, Lanzhou, 730000, China; Key Laboratory for Environmental Pollution Prediction and Control, Gansu Province, China
| | - Xiaoyun Xie
- College of Earth and Environmental Sciences, Lanzhou University, Lanzhou, 730000, China; Key Laboratory for Environmental Pollution Prediction and Control, Gansu Province, China
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10
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Jung H, Sapner VS, Adhikari A, Sathe BR, Patel R. Recent Progress on Carbon Quantum Dots Based Photocatalysis. Front Chem 2022; 10:881495. [PMID: 35548671 PMCID: PMC9081694 DOI: 10.3389/fchem.2022.881495] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Accepted: 03/07/2022] [Indexed: 12/03/2022] Open
Abstract
As a novel carbon allotrope, carbon quantum dots (CQDs) have been investigated in various fields, including photocatalysis, bioimaging, optoelectronics, energy and photovoltaic devices, biosensing, and drug delivery owing to their unique optical and electronic properties. In particular, CQDs' excellent sunlight harvesting ability, tunable photoluminescence (PL), up-conversion photoluminescence (UCPL), and efficient photo-excited electron transfer have enabled their applications in photocatalysis. This work focuses on the recent progress on CQDs-related materials' synthesis, properties, and applications in photocatalysis.
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Affiliation(s)
- Hwapyung Jung
- Nano Science and Engineering, Integrated Science and Engineering Division (ISED), Underwood International College, Yonsei University, Incheon, South Korea
| | - Vijay S. Sapner
- Department of Chemistry, Dr. Babasaheb Ambedkar Marathwada University Aurangabad, Seoul, South Korea
| | | | - Bhaskar R. Sathe
- Department of Chemistry, Dr. Babasaheb Ambedkar Marathwada University Aurangabad, Seoul, South Korea,*Correspondence: Bhaskar R. Sathe, ; Rajkumar Patel,
| | - Rajkumar Patel
- Energy and Environmental Science and Engineering (EESE), Integrated Science and Engineering Division (ISED), Underwood International College, Yonsei University, Incheon, South Korea,*Correspondence: Bhaskar R. Sathe, ; Rajkumar Patel,
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Liu W, Wang Q, Liu Z, Ding G. Bridging between NiAl-LDH and g-C 3N 4 by using carbon quantum dots for highly enhanced photoreduction of CO 2 into CO. J Colloid Interface Sci 2022; 622:21-30. [PMID: 35487108 DOI: 10.1016/j.jcis.2022.04.102] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Revised: 04/15/2022] [Accepted: 04/17/2022] [Indexed: 10/18/2022]
Abstract
A series of treble NiAl-LDH/g-C3N4/carbon quantum dots (LDH/CN/CQDs) photocatalysts is successfully prepared for the photoreduction of CO2 to CO via a facile hydrothermal pathway. In the 3D flower-like LDH/CN/CQDs, CQDs not only achieve the efficient inhibition of charge recombination but also act as the unhindered "electronic bridges" to synergistically construct a classical type-Ⅱ charge transfer configuration, which synchronously permits the effluence of photogenerated electrons from CN to LDH and holes from LDH to CN, and promotes ultraviolet-visible irradiation respondence. The sample of LDH/CN/CQDs-6 is the optimal one amongst the LDH/CN/CQDs with a larger special surface area (98.43 m2g-1) and an appropriate content of CQDs (66.9 wt%), exhibiting the highest CO evolution rate (5.2 μmol·g-1·h-1) under visible light irradiation without any sacrificial agent or photosensitizer in water. This is 26.8- and 20.9-fold higher than those of the pristine LDH, pure CN, and their binary counterparts, respectively, and also outperforms most reported LDH-based photocatalysts. As unhindered electron conduction bridges, the highly dispersed CQDs in the LDH/CN heterojunction significantly increase utilization efficiency of light energy and separation efficiency of photogenerated electron-hole pairs. This work provides a beneficial attempt to integrate CQDs with LDH/CN for the positive synergetic effect on both photoelectric properties and electron transfer to obtain highly enhanced photocatalytic activity of CO2 into CO, and expected to be extended towards broader photocatalytic applications.
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Affiliation(s)
- Wentao Liu
- Faculty of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian 116029, P.R. China
| | - Qiu Wang
- Faculty of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian 116029, P.R. China
| | - Zhi Liu
- Department of Chemistry, College of Science, Shantou University, Shantou 515063, P.R. China.
| | - Guixiang Ding
- Faculty of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian 116029, P.R. China
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12
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Ponkshe A, Thakur P. Solar light-driven photocatalytic degradation and mineralization of beta blockers propranolol and atenolol by carbon dot/TiO 2 composite. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:15614-15630. [PMID: 34628578 DOI: 10.1007/s11356-021-16796-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Accepted: 09/24/2021] [Indexed: 06/13/2023]
Abstract
Herein improved solar light-driven photocatalytic degradation and mineralization of two emerging pollutants as well as recalcitrant beta blockers propranolol (PR) and atenolol (AT) have been demonstrated by metal-free carbon dot/TiO2 (CDT) composite. Hydrothermally synthesized TiO2 has been decorated with electrochemically synthesized carbon dots (CDs) and was well characterized by various analytical techniques viz. XRD, FTIR, Raman, XPS, UV-visible DRS, FESEM, and TEM. The optimized CDT composite, 2CDT (2 mL carbon dot/TiO2), showed ~ 3.45- and ~ 1.75-fold enhancement in the photodegradation rate as compared to pristine TiO2 for PR and AT respectively in 1 hour of irradiation along with complete degradation of PR and AT after 3 hours of irradiation. 2CDT exhibited 76% and 80% mineralization of PR and AT in contrast with 62% and 47% observed by pristine TiO2. Further, the major reaction intermediates formed after degradation have been identified by HPLC/MS analysis, confirming more than 99% reduction of the parent compound for both PR and AT. Reusability of the optimized catalyst also showed successful degradation up to 3 cycles, showing reduction abilities of 97%, 95%, and 94% for 1st, 2nd, and 3rd cycle respectively. The enhanced degradation and mineralization efficiency of the 2CDT composite could be attributed to the excellent photosensitizer and electron reservoir properties of the CD along with upconverted photoluminescence behavior. The present study unlocks the possibility of using metal-free, facile CDT composite for effective degradation and mineralization of widely used beta blockers and other pharmaceuticals.
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Affiliation(s)
- Amruta Ponkshe
- Department of Environmental Sciences, Savitribai Phule Pune University, Ganeshkhind, Pune, 411007, India
| | - Pragati Thakur
- epartment of Chemistry, Savitribai Phule Pune University, Ganeshkhind, Pune , 411007, India.
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13
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Cheng Y, Wei Y, Fang C, Chen J, Zhao W. Facile synthesis of CQDs/Ag NPs composites with photoluminescence and their potential application in antibacterial materials. INORG CHEM COMMUN 2021. [DOI: 10.1016/j.inoche.2021.109059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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14
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Wang L, Zuo N, Sun M, Ma Y, Mominou N, Jiang W, Li S, Jing C. Deep desulfurization and denitrogenation of diesel fuel over Ir/Pr-N-CQDs-TiO2 under ultraviolet radiation. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.118861] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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15
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Gogoi D, Shah AK, Rambabu P, Qureshi M, Golder AK, Peela NR. Step-Scheme Heterojunction between CdS Nanowires and Facet-Selective Assembly of MnO x-BiVO 4 for an Efficient Visible-Light-Driven Overall Water Splitting. ACS APPLIED MATERIALS & INTERFACES 2021; 13:45475-45487. [PMID: 34521201 DOI: 10.1021/acsami.1c11740] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The spatial separation and transport of photogenerated charge carriers is crucial in building an efficient photocatalyst for solar energy conversion into chemical energy. A step-scheme CdS/MnOx-BiVO4 photocatalyst was synthesized by spatial deposition of MnOx and one-dimensional (1D) CdS nanowires on a three-dimensional (3D) decahedron BiVO4 surface. The photocatalytic activity of CdS/MnOx-BiVO4 for the overall water-splitting reaction was investigated without sacrificial reagent under visible light irradiation. The synthesized photocatalysts were thoroughly analyzed using high-end characterization techniques. The 5CdS/MnOx-BiVO4 exhibited the highest H2 and O2 production rates of 1.01 and 0.51 mmol g-1 h-1, respectively, with an apparent quantum yield of 11.3% in the absence of any sacrificial reagent. The excellent photoactivity is due to the presence of oxygen vacancies along with effective charge separation/transfer properties and strong interaction of cocatalysts (MnOx and Pt) with the photocatalysts (BiVO4 and CdS) in the 5CdS/MnOx-BiVO4 heterojunction. The significance of the presence of MnOx and Pt cocatalysts on the selective facets of BiVO4 for efficient overall water splitting reaction is highlighted in this work.
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Affiliation(s)
- Devipriya Gogoi
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| | - Adit Kumar Shah
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| | - Ponnala Rambabu
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| | - Mohammad Qureshi
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| | - Animes Kumar Golder
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| | - Nageswara Rao Peela
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
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16
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Recent advances in bismuth vanadate-based photocatalysts for photoelectrochemical water splitting. CHINESE CHEM LETT 2021. [DOI: 10.1016/j.cclet.2020.11.065] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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17
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Verma N, Ananthakrishnan R. Boosted Charge Transfer Efficacy of an All‐Solid‐State Z‐Scheme BiOI‐CD‐CdS Photocatalyst for Enhanced Degradation of 4‐Nitrophenol and Oxidation of Benzyl Alcohol under Visible Light**. CHEMPHOTOCHEM 2021. [DOI: 10.1002/cptc.202000280] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Neha Verma
- Department of Chemistry, Environmental Chemistry & Analytical Chemistry Laboratory Indian Institute of Technology Kharagpur 721 302 West Bengal India
| | - Rajakumar Ananthakrishnan
- Department of Chemistry, Environmental Chemistry & Analytical Chemistry Laboratory Indian Institute of Technology Kharagpur 721 302 West Bengal India
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18
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Huang K, Hu T, Wang Y. Enhanced photocatalytic degradation of methylene blue through synthesizing of novel of BiVO4/Zn2SnO4 under visible light. J SOLID STATE CHEM 2021. [DOI: 10.1016/j.jssc.2020.121864] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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19
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Investigation of visible-light-driven photocatalytic tetracycline degradation via carbon dots modified porous ZnSnO3 cubes: Mechanism and degradation pathway. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2020.117518] [Citation(s) in RCA: 69] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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20
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Rais, Rais A, Rawat K, Prasad T, Bohidar HB. Boron-doped carbon quantum dots: a 'turn-off' fluorescent probe for dopamine detection. NANOTECHNOLOGY 2020; 32:025501. [PMID: 33055372 DOI: 10.1088/1361-6528/abb84d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Boron-doped carbon quantum dots (size 2.3 nm) were fabricated by a modified hydrothermal carbonization one-pot synthesis protocol using 4-hydroxy phenylboronic acid as the common precursor that provided seed for the formation of carbon quantum dots as well as the dopant. These quantum dots exhibited excellent properties, namely good aqueous dispersion, strong fluorescence emission, good environmental stability, high selectivity and sensitivity towards the neurochemical dopamine even in the absence of any linker, functionalizing agents or enzyme. It is shown that this material can be used as a 'turn-off' fluorescent probe for the detection of even low concentrations of dopamine with a limit of detection (3σ/S) of about 6 μM. The simplicity of the synthesis protocol and the ease of dopamine detection define the novelty of this approach.
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Affiliation(s)
- Rais
- Department of Chemistry, School of Life and Chemical Sciences, Jamia Hamdard, New Delhi, India. School of Physical Sciences, Jawaharlal Nehru University, New Delhi, India
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21
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Segkos A, Sakellis I, Boukos N, Drivas C, Kennou S, Kordatos K, Tsamis C. Patterned carbon dot-based thin films for solid-state devices. NANOSCALE 2020; 12:10254-10264. [PMID: 32356538 DOI: 10.1039/c9nr08904g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Carbon dot-based fluorescent nanocomposite compounds were obtained following microwave assisted thermal treatment of an aqueous mixture consisting of citric acid and urea. Thin film deposition of nanocomposites on SiO2 (100) substrates is followed by annealing, in order to render the films dissolution-resistant and processable. Optical lithography and O2 plasma etching are utilized to pattern the deposited films in the desired shapes and dimensions and a solid-state relative humidity sensor is fabricated on the SiO2 substrate. Spectroscopy and microscopy techniques are employed to characterize and monitor the whole process throughout the fabrication steps. The patterned films retain the functional groups introduced during their synthesis and continue to display hydrophilicity and PL properties. Successful patterning of these nanocomposites opens the way for the fabrication of solid-state, carbon dot-based optical and electrical devices that take advantage of the properties of carbon quantum dots.
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Affiliation(s)
- Apostolos Segkos
- Institute of Nanoscience and Nanotechnology (INN), National Centre for Scientific Research "Demokritos", Patr. Gregoriou E & 27 Neapoleos Str., Aghia Paraskevi, 15341, Athens, Greece. and Department of Chemical Sciences, School of Chemical Engineering, NTUA, 15780 Athens, Greece
| | - Ilias Sakellis
- Institute of Nanoscience and Nanotechnology (INN), National Centre for Scientific Research "Demokritos", Patr. Gregoriou E & 27 Neapoleos Str., Aghia Paraskevi, 15341, Athens, Greece.
| | - Nikolaos Boukos
- Institute of Nanoscience and Nanotechnology (INN), National Centre for Scientific Research "Demokritos", Patr. Gregoriou E & 27 Neapoleos Str., Aghia Paraskevi, 15341, Athens, Greece.
| | - Charalampos Drivas
- Department of Chemical Engineering, University of Patras, 26504, Patras, Greece
| | - Stella Kennou
- Department of Chemical Engineering, University of Patras, 26504, Patras, Greece
| | - Konstantinos Kordatos
- Department of Chemical Sciences, School of Chemical Engineering, NTUA, 15780 Athens, Greece
| | - Christos Tsamis
- Institute of Nanoscience and Nanotechnology (INN), National Centre for Scientific Research "Demokritos", Patr. Gregoriou E & 27 Neapoleos Str., Aghia Paraskevi, 15341, Athens, Greece.
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22
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Liu Y, Zhu C, Sun J, Ge Y, Song F, Xu Q. In situ assembly of CQDs/Bi2WO6 for highly efficient photocatalytic degradation of VOCs under visible light. NEW J CHEM 2020. [DOI: 10.1039/c9nj04957f] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
A facile strategy of the assembly of CQD/Bi2WO6 hybrid materials, which exhibit highly efficient photocatalytic degradation of pollutants under visible light.
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Affiliation(s)
- Yangqing Liu
- School of Chemistry and Engineering
- Yancheng Institute of Technology
- Yancheng
- P. R. China
- Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province
| | - Changjun Zhu
- School of Chemistry and Engineering
- Yancheng Institute of Technology
- Yancheng
- P. R. China
- Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province
| | - Jingwen Sun
- School of Chemistry and Engineering
- Yancheng Institute of Technology
- Yancheng
- P. R. China
- Key Laboratory under Construction for Volatile Organic Compounds Controlling of Jiangsu Province
| | - Yan Ge
- School of Chemistry and Engineering
- Yancheng Institute of Technology
- Yancheng
- P. R. China
- Key Laboratory under Construction for Volatile Organic Compounds Controlling of Jiangsu Province
| | - Fujiao Song
- School of Chemistry and Engineering
- Yancheng Institute of Technology
- Yancheng
- P. R. China
- Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province
| | - Qi Xu
- School of Chemistry and Engineering
- Yancheng Institute of Technology
- Yancheng
- P. R. China
- Key Laboratory under Construction for Volatile Organic Compounds Controlling of Jiangsu Province
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23
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Sheng Y, Yi D, Qingsong H, Ting W, Ming L, Yong C, Yifan S, Jun D, Bin W, Xia J, Huaming L. CQDs modified PbBiO2Cl nanosheets with improved molecular oxygen activation ability for photodegradation of organic contaminants. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2019.111921] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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24
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One-Pot Synthesized Visible Light-Driven BiOCl/AgCl/BiVO 4 n-p Heterojunction for Photocatalytic Degradation of Pharmaceutical Pollutants. MATERIALS 2019; 12:ma12142297. [PMID: 31323776 PMCID: PMC6679066 DOI: 10.3390/ma12142297] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Revised: 07/15/2019] [Accepted: 07/15/2019] [Indexed: 11/17/2022]
Abstract
A novel enhanced visible light absorption BiOCl/AgCl/BiVO4 heterojunction of photocatalysts could be obtained through a one-pot hydrothermal method used with two different pH solutions. There was a relationship between synthesis pH and the ratio of BiOCl to BiVO4 in XRD planes and their photocatalytic activity. The visible light photocatalytic performances of photocatalysts were evaluated via degradation of diclofenac (DCFF) as a pharmaceutical model pollutant. Furthermore, kinetic studies showed that DCF degradation followed pseudo-first-order kinetics. The photocatalytic degradation rates of BiOCl/AgCl/BiVO4 synthesized at pH = 1.2 and pH = 4 for DCF were 72% and 47%, respectively, showing the higher activity of the photocatalyst which was synthesized at a lower pH value. It was concluded that the excellent photocatalytic activity of BiOCl/AgCl/BiVO4 is due to the enhanced visible light absorption formation of a heterostructure, which increased the lifetime of photo-produced electron–hole pairs by creating a heterojunction. The influence of pH during synthesis on photocatalytic activity in order to create different phases was investigated. This work suggests that the BiOCl/AgCl/BiVO4 p-n heterojunction is more active when the ratio of BiOCl to BiVO4 is smaller, and this could be achieved simply by the pH adjustment. This is a promising method of modifying the photocatalyst for the purpose of pollutant degradation under visible light illumination.
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25
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Baogang Wang, Bin Zhao. Carbon Dots/CoFe2O4 Mesoporous Nanosphere Composites As a Magnetically Separable Visible Light Photocatalyst. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2019. [DOI: 10.1134/s0036024419020043] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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26
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Jaihindh DP, Thirumalraj B, Chen SM, Balasubramanian P, Fu YP. Facile synthesis of hierarchically nanostructured bismuth vanadate: An efficient photocatalyst for degradation and detection of hexavalent chromium. JOURNAL OF HAZARDOUS MATERIALS 2019; 367:647-657. [PMID: 30654282 DOI: 10.1016/j.jhazmat.2019.01.017] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Revised: 01/03/2019] [Accepted: 01/08/2019] [Indexed: 06/09/2023]
Abstract
Heterostructured nanomaterials can paid more significant attention in environmental safety for the detection and degradation/removal of hazardous toxic chemicals over a decay. Here, we report the preparation of hierarchically nanostructured shuriken like bismuth vanadate (BiVO4) as a bifunctional catalyst for photocatalytic degradation and electrochemical detection of highly toxic hexavalent chromium (Cr(VI)) using the green deep eutectic solvent reline, which allows morphology control in one of the less energy-intensive routes. The SEM results showed a good dispersion of BiVO4 catalyst and the HR-TEM revealed an average particle size of ca. 5-10 nm. As a result, the BiVO4 exhibited good photocatalytic activity under UV-light about 95% reduction of Cr(VI) to Cr(III) was observed in 160 min. The recyclability of BiVO4 catalyst exhibited an appreciable reusability and stability of the catalyst towards the photocatalytic reduction of Cr(VI). Also, the BiVO4-modified screen printed carbon electrode (BiVO4/SPCE) displayed an excellent electrochemical performance towards the electrochemical detection of Cr(VI). Besides, the BiVO4/SPCE demonstrated tremendous electrocatalytic activity, lower linear range (0.01-264.5 μM), detection limit (0.0035 μM) and good storage stability towards the detection of Cr(VI). Importantly, the BiVO4 modified electrode was also found to be a good recovery in water samples for practical applications.
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Affiliation(s)
- Dhayanantha Prabu Jaihindh
- Department of Materials Science and Engineering, National Dong Hwa University, Shoufeng, Hualien, 97401, Taiwan
| | - Balamurugan Thirumalraj
- Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan; Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei, 10608, Taiwan
| | - Sheng-Ming Chen
- Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei, 10608, Taiwan.
| | - Paramasivam Balasubramanian
- Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei, 10608, Taiwan
| | - Yen-Pei Fu
- Department of Materials Science and Engineering, National Dong Hwa University, Shoufeng, Hualien, 97401, Taiwan.
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27
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Jiang R, Wu D, Lu G, Yan Z, Liu J, Zhou R, Nkoom M. Fabrication of Fe3O4 quantum dots modified BiOCl/BiVO4 p-n heterojunction to enhance photocatalytic activity for removing broad-spectrum antibiotics under visible light. J Taiwan Inst Chem Eng 2019. [DOI: 10.1016/j.jtice.2019.01.010] [Citation(s) in RCA: 62] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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28
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Wang Y, Chen J, Liu L, Xi X, Li Y, Geng Z, Jiang G, Zhao Z. Novel metal doped carbon quantum dots/CdS composites for efficient photocatalytic hydrogen evolution. NANOSCALE 2019; 11:1618-1625. [PMID: 30306173 DOI: 10.1039/c8nr05807e] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Carbon quantum dots (CDs) are rising stars for photocatalytic applications due to their low toxicity and excellent electron transfer characteristics. Doping with heteroatoms is expected to adjust the band levels and electron transfer properties of CDs, and understanding the effect of doping on CDs can aid the rational preparation of highly efficient CD-based photocatalysts. Herein, we prepared a series of metal atom (Zn, Co, Bi, Cd, or Ti) doped CDs by pyrolysis and explored the photocatalytic application of these metal doped CDs for the first time. The metal doped CDs were combined with CdS nanowires as a co-catalyst for photocatalytic hydrogen production. The Bi, Cd and Ti doped CDs/CdS composites show much better hydrogen production performance than the undoped CDs/CdS composite. Among these composites, Bi-CDs/CdS presents the optimal interfacial charge separation and the best hydrogen production performance. The hydrogen evolution rate of Bi-CDs/CdS is 4.2 times and almost one time higher than that of pure CdS and undoped CDs/CdS, respectively. Bi doping can make the CDs metallic and promote the charge transfer of CDs. Such a great enhancement originates from the outstanding electron transfer properties of Bi-doped CDs, as well as the effective charge separation between Bi-doped CDs and CdS. Bi doping was demonstrated to be an effective strategy for optimizing the photocatalytic activity of CD based composites.
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Affiliation(s)
- Yajun Wang
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing, Beijing 102249, People's Republic of China.
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29
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Yang R, Zhu R, Fan Y, Hu L, Chen Q. In situ synthesis of C-doped BiVO4 with natural leaf as a template under different calcination temperatures. RSC Adv 2019; 9:14004-14010. [PMID: 35519349 PMCID: PMC9064008 DOI: 10.1039/c9ra01875a] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Accepted: 04/10/2019] [Indexed: 11/28/2022] Open
Abstract
In this work, a series of C-doped BiVO4 (BiVO4-T) with natural leaf structures were synthesized by a dipping-calcination method with the leaf of Chongyang wood seedling as a template under different calcination temperatures. The structures and morphologies of BiVO4-T were observed by FE-SEM observations. The doped carbon in BiVO4-T was formed in situ from the natural leaf during the calcination process and the amount of doping could be regulated from 0.51–1.16 wt% by controlling the calcination temperature. It was found that the sample calcined at 600 °C (BiVO4-600) with a C-doping content of 1.16 wt% showed the best photocatalytic degradation activity. After 120 min visible light irradiation, the photocatalytic decomposition efficiency of RhB for BiVO4-600 is 2.2 times higher than that of no template BiVO4. The enhanced photocatalytic performance is ascribed to the combined action of the unique morphology and doped-carbon. It is considered that the unique structures and carbon doping of BiVO4-600 are in favor of the enhancement of visible light absorption, which was supported by UV-vis DRS. Furthermore, the C-doping can enhance the efficient separation and transfer of the photo-generated electron–hole pairs, as proved by PL measurements. This study provides a simple dipping-calcination method and found the best calcination temperature to fabricate a high-performance BiVO4, which simultaneously achieves morphology and C-doping control in one step. A series of C-doped BiVO4 with natural leaf as a template were synthesized under different calcination temperatures by the dipping-calcination method, which simultaneously achieves morphology and C-doping control in one step.![]()
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Affiliation(s)
- Ruijie Yang
- Shenzhen Key Laboratory of Organic Pollution Prevention and Control
- Environmental Science and Engineering Research Center
- Harbin Institute of Technology (Shenzhen)
- Shenzhen 518055
- P. R. China
| | - Rongshu Zhu
- Shenzhen Key Laboratory of Organic Pollution Prevention and Control
- Environmental Science and Engineering Research Center
- Harbin Institute of Technology (Shenzhen)
- Shenzhen 518055
- P. R. China
| | - Yingying Fan
- Shenzhen Key Laboratory of Organic Pollution Prevention and Control
- Environmental Science and Engineering Research Center
- Harbin Institute of Technology (Shenzhen)
- Shenzhen 518055
- P. R. China
| | - Longjun Hu
- Shenzhen Key Laboratory of Organic Pollution Prevention and Control
- Environmental Science and Engineering Research Center
- Harbin Institute of Technology (Shenzhen)
- Shenzhen 518055
- P. R. China
| | - Qianqian Chen
- Shenzhen Key Laboratory of Organic Pollution Prevention and Control
- Environmental Science and Engineering Research Center
- Harbin Institute of Technology (Shenzhen)
- Shenzhen 518055
- P. R. China
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Sharma S, Mehta S, Ibhadon A, Kansal S. Fabrication of novel carbon quantum dots modified bismuth oxide (α-Bi2O3/C-dots): Material properties and catalytic applications. J Colloid Interface Sci 2019; 533:227-237. [DOI: 10.1016/j.jcis.2018.08.056] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Revised: 08/17/2018] [Accepted: 08/20/2018] [Indexed: 01/09/2023]
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Li Z, Che G, Jiang W, Liu L, Wang H. Visible-light-driven CQDs@MIL-125(Ti) nanocomposite photocatalyst with enhanced photocatalytic activity for the degradation of tetracycline. RSC Adv 2019; 9:33238-33245. [PMID: 35529147 PMCID: PMC9073379 DOI: 10.1039/c9ra05600a] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2019] [Accepted: 09/26/2019] [Indexed: 11/21/2022] Open
Abstract
In the present study, a novel photocatalyst, CQDs@MIL-125(Ti) (CQDs = carbon quantum dots), was prepared via a solvothermal procedure. The photocatalytic properties were tested by the degradation of tetracycline (TC) with a 250 W Xe lamp (λ > 420 nm). Compared with pure MIL-125(Ti), the 10 wt% CQDs@MIL-125(Ti) photocatalyst can significantly improve the degradation process of TC, and the degradation efficiency can reach 90% within 4 h. The enhancement in the photocatalytic performance is due to the CQDs, which can promote the absorption of visible light and also efficiently accelerate the separation of photogenerated electron–hole pairs. We have also demonstrated that superoxide radicals (·O2−) and holes (h+) play crucial roles in the photocatalytic degradation of TC through capture experiments. The current work provides a new idea for constructing high-efficiency photocatalysts based on MIL-125(Ti). A novel CQDs@MIL-125(Ti) photocatalyst had been synthesized by a facile solvothermal process for the degradation of TC. The possible degradation mechanism was proposed based on the active species trapping experiments.![]()
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Affiliation(s)
- Zhi Li
- Key Laboratory of Preparation and Application of Environmental Friendly Materials (Jilin Normal University)
- Ministry of Education
- Changchun 130103
- People's Republic of China
| | - Guangbo Che
- Key Laboratory of Preparation and Application of Environmental Friendly Materials (Jilin Normal University)
- Ministry of Education
- Changchun 130103
- People's Republic of China
| | - Wei Jiang
- Key Laboratory of Preparation and Application of Environmental Friendly Materials (Jilin Normal University)
- Ministry of Education
- Changchun 130103
- People's Republic of China
| | - Lihui Liu
- Key Laboratory of Preparation and Application of Environmental Friendly Materials (Jilin Normal University)
- Ministry of Education
- Changchun 130103
- People's Republic of China
| | - Hairui Wang
- Key Laboratory of Preparation and Application of Environmental Friendly Materials (Jilin Normal University)
- Ministry of Education
- Changchun 130103
- People's Republic of China
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Zhao F, Rong Y, Wan J, Hu Z, Peng Z, Wang B. High photocatalytic performance of carbon quantum dots/TNTs composites for enhanced photogenerated charges separation under visible light. Catal Today 2018. [DOI: 10.1016/j.cattod.2018.02.019] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Patra A, Gogoi G, Qureshi M. Ordered-Disordered BaZrO 3-δ Hollow Nanosphere/Carbon Dot Hybrid Nanocomposite: A New Visible-Light-Driven Efficient Composite Photocatalyst for Hydrogen Production and Dye Degradation. ACS OMEGA 2018; 3:10980-10991. [PMID: 31459208 PMCID: PMC6645119 DOI: 10.1021/acsomega.8b01577] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Accepted: 08/28/2018] [Indexed: 06/01/2023]
Abstract
Perovskites form an interesting class of photocatalytic compounds because of their chemical stability and exotic chemistry. Although barium zirconates have been known for a long time, their photocatalytic study in the literature is very limited. Herein, we have studied the effect of structural disorder, oxygen vacancies and carbon dots (CDs) on photocatalytic activity of BaZrO3-δ (BZO) hollow nanospheres. High alkaline conditions during hydrothermal synthesis lead to the formation of disordered states as well as oxygen vacancies in BZO and create midgap states within the band gap of BZO. The midgap states further shift its absorption onset toward visible light and their presence and effects have been proved by ultraviolet-visible diffuse reflectance spectroscopy, X-ray photoelectron spectroscopy, and electron spin resonance analysis. A composite that consists of CDs shows upconversion photoluminescence and charge-carrier transfer properties to enhance the light absorption of a photocatalyst and its activity. The photocatalytic efficiency of the compounds were examined by H2 evolution and the degradation of methylene blue (MB) dye. In this study, loading of 3 wt% CDs on BZO shows the highest hydrogen evolution efficiency (670 μmol/h/g) with an apparent quantum yield of ∼4% and the highest MB dye degradation efficiency (∼90%) among all synthesized composites. The synergistic effect of increased visible light absorption along with enhanced photogenerated charge-carrier transfer efficiency in the presence of CDs and oxygen vacancies in BZO contributes to the enhanced photocatalytic efficacy of hybrid nanomaterials under visible light irradiation.
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Tong H, Zhan X, Tian X, Li J, Qian D, Wu D. Understanding the energy level matching relationships between semiconductor photocatalysts and organic pollutants for effective photocatalytic degradations. J Colloid Interface Sci 2018; 526:384-391. [DOI: 10.1016/j.jcis.2018.05.009] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Revised: 04/28/2018] [Accepted: 05/05/2018] [Indexed: 10/17/2022]
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36
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Hu Q, Ji M, Di J, Wang B, Xia J, Zhao Y, Li H. Ionic liquid-induced double regulation of carbon quantum dots modified bismuth oxychloride/bismuth oxybromide nanosheets with enhanced visible-light photocatalytic activity. J Colloid Interface Sci 2018; 519:263-272. [DOI: 10.1016/j.jcis.2018.02.057] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2017] [Revised: 02/15/2018] [Accepted: 02/17/2018] [Indexed: 10/18/2022]
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37
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Ren H, Ge L, Guo Q, Li L, Hu G, Li J. The enhancement of photocatalytic performance of SrTiO 3 nanoparticles via combining with carbon quantum dots. RSC Adv 2018; 8:20157-20165. [PMID: 35541666 PMCID: PMC9080776 DOI: 10.1039/c8ra02103a] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Accepted: 05/17/2018] [Indexed: 12/05/2022] Open
Abstract
Carbon quantum dots were prepared by a simple chemical process using activated carbon as carbon source. The as-prepared carbon quantum dots are fine with a narrow size distribution and show excellent hydrophilicity. The carbon quantum dots were combined with SrTiO3 nanoparticles through a simple impregnation process to obtain a carbon quantum dots/SrTiO3 nanocomposite. The photocatalytic reaction rate of carbon quantum dots/SrTiO3 nanocomposite is about 5.5 times as large as that of pure SrTiO3 in the degradation of rhodamine B under sunlight irradiation. The enhanced performance in the degradation of rhodamine B may be attributed to the interfacial transfer of photogenerated electrons from SrTiO3 to carbon quantum dots, leading to effective charge separation in SrTiO3. Carbon quantum dots show potential applications in high-efficiency photocatalyst design.
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Affiliation(s)
- Haitao Ren
- Institute of Materials Science and Engineering, Lanzhou University Lanzhou 730000 China
| | - Lin Ge
- Institute of Materials Science and Engineering, Lanzhou University Lanzhou 730000 China
| | - Qian Guo
- Institute of Materials Science and Engineering, Lanzhou University Lanzhou 730000 China
| | - Lu Li
- Institute of Materials Science and Engineering, Lanzhou University Lanzhou 730000 China
| | - Guangkuo Hu
- Institute of Materials Science and Engineering, Lanzhou University Lanzhou 730000 China
| | - Jiangong Li
- Institute of Materials Science and Engineering, Lanzhou University Lanzhou 730000 China
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38
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Enhanced Photocatalytic Activity toward Organic Pollutants Degradation and Mechanism Insight of Novel CQDs/Bi₂O₂CO₃ Composite. NANOMATERIALS 2018; 8:nano8050330. [PMID: 29762512 PMCID: PMC5977344 DOI: 10.3390/nano8050330] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/21/2018] [Revised: 05/10/2018] [Accepted: 05/10/2018] [Indexed: 11/16/2022]
Abstract
Novel carbon quantum dots (CQDs) modified with Bi2O2CO3 (CQDs/Bi2O2CO3) were prepared using a simple dynamic-adsorption precipitation method. X-ray diffractometry (XRD), transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDX), and scanning electron microscopy (SEM) were used to test the material composition, structure, and band structures of the as-prepared samples. Methylene blue (MB) and colorless phenol, as target organic pollutants, were used to evaluate the photocatalytic performance of the CQDs/Bi2O2CO3 hybrid materials under visible light irradiation. Experimental investigation shows that 2–5 nm CQDs were uniformly decorated on the surface of Bi2O2CO3; CQDs/Bi2O2CO3 possess an efficient photocatalytic performance, and the organic matter removal rate of methylene blue and phenol can reach up to 94.45% and 61.46% respectively, within 2 h. In addition, the degradation analysis of phenol by high performance liquid chromatography (HPLC) proved that there are no other impurities in the degradation process. Photoelectrochemical testing proved that the introduction of CQDs (electron acceptor) effectively suppresses the recombination of e−-h+, and promotes charge transfer. Quenching experiments and electron spin resonance (ESR) suggested that ·OH, h+, and ·O2− were involved in the photocatalytic degradation process. These results suggested that the up-conversion function of CQDs could improve the electron transfer and light absorption ability of photocatalysts and ·O2− formation. Furthermore, the up-conversion function of CQDs would help maintain photocatalytic stability. Finally, the photocatalytic degradation mechanism was proposed according to the above experimental result.
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39
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Jiang X, Zhang Z, Mei J, Han D, Xie M, Wang F, Xie E, Han W. Carbon quantum dots based charge bridge between photoanode and electrocatalysts for efficiency water oxidation. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2018.04.052] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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40
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Zhu M, Zhou Y, Sun Y, Zhu C, Hu L, Gao J, Huang H, Liu Y, Kang Z. Cobalt phosphide/carbon dots composite as an efficient electrocatalyst for oxygen evolution reaction. Dalton Trans 2018; 47:5459-5464. [PMID: 29595849 DOI: 10.1039/c7dt04291d] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The oxygen evolution reaction (OER) is a promising energy conversion system, which has been studied a lot in recent years. However, owing to the high overpotential and sluggish kinetics of the OER, an efficient electrocatalyst is necessary to lower the overpotential and accelerate the reaction. In this paper, we report a cobalt phosphide (CoP)/carbon dots (CDs) composite as an electrocatalyst for the OER for the first time. A facile two-step method was used to synthesize the CoP/CDs composite and the concentration of CDs in the composite was further regulated. The experimental results show that when the amount of CDs in the composite is 6 mg (28.79 wt%C), the obtained CoP/CDs composite exhibits optimal electrocatalytic activity (with an overpotential of 400 mV in 1 M KOH at a current density of 10 mA cm-2) and high stability towards the OER. The good electrocatalytic activity of the composite is attributed to the small size of CoP and CDs and rapid electron transfer of CDs.
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Affiliation(s)
- Mengmeng Zhu
- Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices, Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou, PR China.
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41
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Shen Q, You Z, Yu Y, Qin T, Su Y, Wang H, Wu C, Zhang F, Yang H. A Carbon Quantum Dots/Porous InVO4
Microsphere Composite with Enhanced Photocatalytic Activity. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201701325] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Qianhong Shen
- State Key Laboratory of Silicon Materials; School of Materials Science and Engineering; Zhejiang University; 310027 Hangzhou P. R. China310027
- Zhejiang-California International NanoSystems Institute; Zhejiang University; Hangzhou P. R. China310058
| | - Zengyu You
- State Key Laboratory of Silicon Materials; School of Materials Science and Engineering; Zhejiang University; 310027 Hangzhou P. R. China310027
| | - Yang Yu
- State Key Laboratory of Silicon Materials; School of Materials Science and Engineering; Zhejiang University; 310027 Hangzhou P. R. China310027
| | - Tian Qin
- State Key Laboratory of Silicon Materials; School of Materials Science and Engineering; Zhejiang University; 310027 Hangzhou P. R. China310027
| | - Yuxuan Su
- State Key Laboratory of Silicon Materials; School of Materials Science and Engineering; Zhejiang University; 310027 Hangzhou P. R. China310027
| | - Hui Wang
- State Key Laboratory of Silicon Materials; School of Materials Science and Engineering; Zhejiang University; 310027 Hangzhou P. R. China310027
| | - Chunchun Wu
- Zhejiang-California International NanoSystems Institute; Zhejiang University; Hangzhou P. R. China310058
- Zigong Innovation Center; Zhejiang University; Sichuan P. R. China643000
| | - Fang Zhang
- Zhejiang-California International NanoSystems Institute; Zhejiang University; Hangzhou P. R. China310058
| | - Hui Yang
- State Key Laboratory of Silicon Materials; School of Materials Science and Engineering; Zhejiang University; 310027 Hangzhou P. R. China310027
- Zhejiang-California International NanoSystems Institute; Zhejiang University; Hangzhou P. R. China310058
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42
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Zhang F, He Y, Li W, Zhao L, Chen H, He X, Guo J. N-Doped carbon dots decorated ceria hollow spheres for enhanced activity of RhB degradation by visible light. CHEMICAL PAPERS 2018. [DOI: 10.1007/s11696-018-0395-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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43
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Zhao G, Liu W, Hao Y, Zhang Z, Li Q, Zang S. Nanostructured shuriken-like BiVO4 with preferentially exposed {010} facets: preparation, formation mechanism, and enhanced photocatalytic performance. Dalton Trans 2018; 47:1325-1336. [DOI: 10.1039/c7dt04431c] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis, formation mechanism, and application of nanostructured shuriken-like BiVO4 with preferentially exposed {010} facets have been reported.
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Affiliation(s)
- Guosheng Zhao
- College of Chemistry
- Liaoning University
- Shenyang 110036
- China
- Key Laboratory of Preparation and Application of Environmental Friendly Materials (Jilin Normal University)
| | - Wei Liu
- Key Laboratory of Preparation and Application of Environmental Friendly Materials (Jilin Normal University)
- Ministry of Education
- Changchun 130103
- China
- College of Environmental Science and Engineering
| | - Yan Hao
- College of Chemistry
- Jilin Normal University
- Siping 136000
- China
| | - Zhuo Zhang
- College of Chemistry
- Jilin Normal University
- Siping 136000
- China
| | - Qing Li
- College of Chemistry
- Jilin Normal University
- Siping 136000
- China
| | - Shuliang Zang
- College of Chemistry
- Liaoning University
- Shenyang 110036
- China
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44
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Lee MG, Moon CW, Park H, Sohn W, Kang SB, Lee S, Choi KJ, Jang HW. Dominance of Plasmonic Resonant Energy Transfer over Direct Electron Transfer in Substantially Enhanced Water Oxidation Activity of BiVO 4 by Shape-Controlled Au Nanoparticles. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2017; 13. [PMID: 28834195 DOI: 10.1002/smll.201701644] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2017] [Revised: 07/02/2017] [Indexed: 05/07/2023]
Abstract
The performance of plasmonic Au nanostructure/metal oxide heterointerface shows great promise in enhancing photoactivity, due to its ability to confine light to the small volume inside the semiconductor and modify the interfacial electronic band structure. While the shape control of Au nanoparticles (NPs) is crucial for moderate bandgap semiconductors, because plasmonic resonance by interband excitations overlaps above the absorption edge of semiconductors, its critical role in water splitting is still not fully understood. Here, first, the plasmonic effects of shape-controlled Au NPs on bismuth vanadate (BiVO4 ) are studied, and a largely enhanced photoactivity of BiVO4 is reported by introducing the octahedral Au NPs. The octahedral Au NP/BiVO4 achieves 2.4 mA cm-2 at the 1.23 V versus reversible hydrogen electrode, which is the threefold enhancement compared to BiVO4 . It is the highest value among the previously reported plasmonic Au NPs/BiVO4 . Improved photoactivity is attributed to the localized surface plasmon resonance; direct electron transfer (DET), plasmonic resonant energy transfer (PRET). The PRET can be stressed over DET when considering the moderate bandgap semiconductor. Enhanced water oxidation induced by the shape-controlled Au NPs is applicable to moderate semiconductors, and shows a systematic study to explore new efficient plasmonic solar water splitting cells.
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Affiliation(s)
- Mi Gyoung Lee
- Department of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul, 08826, Republic of Korea
| | - Cheon Woo Moon
- Department of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul, 08826, Republic of Korea
| | - Hoonkee Park
- Department of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul, 08826, Republic of Korea
| | - Woonbae Sohn
- Department of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul, 08826, Republic of Korea
| | - Sung Bum Kang
- School of Materials Science and Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
| | - Sanghan Lee
- School of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju, 61005, Republic of Korea
| | - Kyoung Jin Choi
- School of Materials Science and Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
| | - Ho Won Jang
- Department of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul, 08826, Republic of Korea
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45
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Li H, Shi W, Huang W, Yao EP, Han J, Chen Z, Liu S, Shen Y, Wang M, Yang Y. Carbon Quantum Dots/TiO x Electron Transport Layer Boosts Efficiency of Planar Heterojunction Perovskite Solar Cells to 19. NANO LETTERS 2017; 17:2328-2335. [PMID: 28248512 DOI: 10.1021/acs.nanolett.6b05177] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In planar n-i-p heterojunction perovskite solar cells, the electron transport layer (ETL) plays important roles in charge extraction and determine the morphology of the perovskite film. Here, we report a solution-processed carbon quantum dots (CQDs)/TiO2 composite that has negligible absorption in the visible spectral range, a very attractive feature for perovskite solar cells. Using this novel CQDs/TiO2 ETL in conjunction with a planar n-i-p heterojunction, we achieved an unprecedented efficiency of ∼19% under standard illumination test conditions. It was found that a CQDs/TiO2 combination increases both the open circuit voltage and short-circuits current density as compared to using TiO2 alone. Various advanced spectroscopic characterizations including ultrafast spectroscopy, ultraviolet photoelectron spectroscopy, and electronic impedance spectroscopy elucidate that the CQDs increases the electronic coupling between the CH3NH3PbI3-xClx and TiO2 ETL interface as well as energy levers that contribute to electron extraction.
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Affiliation(s)
- Hao Li
- Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology , 1037 Luoyu Road, Wuhan 430074, Hubei, China
| | - Weina Shi
- Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology , 1037 Luoyu Road, Wuhan 430074, Hubei, China
| | - Wenchao Huang
- Department of Materials Science and Engineering, University of California Los Angeles , 405 Hilgard Avenue, Los Angeles, California 90095-9000, United States
| | - En-Ping Yao
- Department of Materials Science and Engineering, University of California Los Angeles , 405 Hilgard Avenue, Los Angeles, California 90095-9000, United States
- Advanced Optoelectronic Technology Center, National Cheng Kung University , No. 1, University Road, East District, Tainan City 70101, Taiwan
| | - Junbo Han
- Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology , 1037 Luoyu Road, Wuhan 430074, Hubei, China
| | - Zhifan Chen
- Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology , 1037 Luoyu Road, Wuhan 430074, Hubei, China
| | - Shuangshuang Liu
- Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology , 1037 Luoyu Road, Wuhan 430074, Hubei, China
| | - Yan Shen
- Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology , 1037 Luoyu Road, Wuhan 430074, Hubei, China
| | - Mingkui Wang
- Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology , 1037 Luoyu Road, Wuhan 430074, Hubei, China
| | - Yang Yang
- Department of Materials Science and Engineering, University of California Los Angeles , 405 Hilgard Avenue, Los Angeles, California 90095-9000, United States
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46
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Huang Y, Liang Y, Rao Y, Zhu D, Cao JJ, Shen Z, Ho W, Lee SC. Environment-Friendly Carbon Quantum Dots/ZnFe 2O 4 Photocatalysts: Characterization, Biocompatibility, and Mechanisms for NO Removal. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2017; 51:2924-2933. [PMID: 28145696 DOI: 10.1021/acs.est.6b04460] [Citation(s) in RCA: 119] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
A highly efficient and environmentally-friendly oxidation process is always desirable for air purification. This study reported a novel carbon quantum dots (CQDs)/ZnFe2O4 composite photocatalyst for the first time through a facile hydrothermal process. The CQDs/ZnFe2O4 (15 vol %) composite demonstrates stronger transient photocurrent response, approximately 8 times higher than that of ZnFe2O4, indicating superior transfer efficiency of photogenerated electrons and separation efficiency of photogenerated electron-hole pairs. Compared with pristine ZnFe2O4 nanoparticles, CQDs/ZnFe2O4 displayed enhanced photocatalytic activities on gaseous NOx removal and high selectivity for nitrate formation under visible light (λ > 420 nm) irradiation. Electron spin resonance analysis and a series of radical-trapping experiments showed that the reactive species contributing to NO elimination were ·O2- and ·OH radicals. The possible mechanisms were proposed regarding how CQDs improve the photocatalytic performance of ZnFe2O4. The CQDs are believed to act as an electron reservoir and transporter as well as a powerful energy-transfer component during the photocatalysis processes over CQDs/ZnFe2O4 samples. Furthermore, the toxicity assessment authenticated good biocompatibility and low cytotoxity of CQDs/ZnFe2O4. The results of this study indicate that CQDs/ZnFe2O4 is a promising photocatalyst for air purification.
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Affiliation(s)
- Yu Huang
- Key Laboratory of Aerosol Chemistry and Physics, Institute of Earth Environment, Chinese Academy of Sciences , Xi'an 710061, China
- State Key Lab of Loess and Quaternary Geology (SKLLQG), Institute of Earth Environment, Chinese Academy of Sciences , Xi'an 710061, China
| | - Yanling Liang
- Key Laboratory of Aerosol Chemistry and Physics, Institute of Earth Environment, Chinese Academy of Sciences , Xi'an 710061, China
| | - Yongfang Rao
- Department of Environmental Science and Engineering, Xi'an Jiaotong University , Xi'an 710049, China
| | - Dandan Zhu
- Key Laboratory of Aerosol Chemistry and Physics, Institute of Earth Environment, Chinese Academy of Sciences , Xi'an 710061, China
| | - Jun-Ji Cao
- Key Laboratory of Aerosol Chemistry and Physics, Institute of Earth Environment, Chinese Academy of Sciences , Xi'an 710061, China
- State Key Lab of Loess and Quaternary Geology (SKLLQG), Institute of Earth Environment, Chinese Academy of Sciences , Xi'an 710061, China
| | - Zhenxing Shen
- Department of Environmental Science and Engineering, Xi'an Jiaotong University , Xi'an 710049, China
| | - Wingkei Ho
- Department of Science and Environmental Studies, The Education University of Hong Kong , Hong Kong, China
| | - Shun Cheng Lee
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University , Hung Hom, Hong Kong, China
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47
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Zheng H, Niu P, Zhao Z. Carbon quantum dot sensitized Pt@Bi2WO6/FTO electrodes for enhanced photoelectro-catalytic activity of methanol oxidation. RSC Adv 2017. [DOI: 10.1039/c7ra01867c] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Carbon quantum dots (CQDs) sensitized Pt@Bi2WO6/FTO electrodes (simplified as CQDs-Pt@Bi2WO6/FTO) were prepared by loading platinum particles onto Bi2WO6 nanoplates via a photo-deposition method and sensitized CQDs via a dip-coating method.
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Affiliation(s)
- Huajun Zheng
- Department of Applied Chemistry
- Zhejiang University of Technology
- Hangzhou 310032
- China
- State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology
| | - Ping Niu
- Department of Applied Chemistry
- Zhejiang University of Technology
- Hangzhou 310032
- China
| | - Zhefei Zhao
- Department of Applied Chemistry
- Zhejiang University of Technology
- Hangzhou 310032
- China
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48
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Wang R, Xie T, Sun Z, Pu T, Li W, Ao JP. Graphene quantum dot modified g-C3N4 for enhanced photocatalytic oxidation of ammonia performance. RSC Adv 2017. [DOI: 10.1039/c7ra07988e] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Graphene quantum dot modified g-C3N4 composite photocatalysts were prepared and their photocatalytic ammonia oxidation performances were studied.
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Affiliation(s)
- Ruiling Wang
- Institute of Technology and Science
- Tokushima University
- Tokushima 770-8506
- Japan
- State Key Laboratory for Marine Corrosion and Protection
| | - Tian Xie
- Institute of Technology and Science
- Tokushima University
- Tokushima 770-8506
- Japan
| | - Zhiyong Sun
- State Key Laboratory for Marine Corrosion and Protection
- Luoyang Ship Material Research Institute (LSMRI)
- Qingdao
- China
| | - Taofei Pu
- Institute of Technology and Science
- Tokushima University
- Tokushima 770-8506
- Japan
| | - Weibing Li
- State Key Laboratory for Marine Corrosion and Protection
- Luoyang Ship Material Research Institute (LSMRI)
- Qingdao
- China
- School of Environment and Safety Engineering
| | - Jin-Ping Ao
- Institute of Technology and Science
- Tokushima University
- Tokushima 770-8506
- Japan
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49
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Zhao C, Liang Y, Li W, Tian Y, Chen X, Yin D, Zhang Q. BiOBr/BiOCl/carbon quantum dot microspheres with superior visible light-driven photocatalysis. RSC Adv 2017. [DOI: 10.1039/c7ra10344a] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
In this paper, BiOBr/BiOCl/CQDs heterostructure microspheres were successfully synthesized via a facile solvothermal method.
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Affiliation(s)
- Chenhui Zhao
- Department of Applied Chemistry
- College of Science
- Northwestern Polytechnical University
- Xi'an 710072
- China
| | - Ying Liang
- Department of Applied Chemistry
- College of Science
- Northwestern Polytechnical University
- Xi'an 710072
- China
| | - Wei Li
- Department of Applied Chemistry
- College of Chemistry and Chemical Engineering
- Shaanxi University of Science & Technology
- Xi'an 710021
- China
| | - Yi Tian
- Department of Applied Chemistry
- College of Science
- Northwestern Polytechnical University
- Xi'an 710072
- China
| | - Xin Chen
- Department of Applied Chemistry
- College of Science
- Northwestern Polytechnical University
- Xi'an 710072
- China
| | - Dezhong Yin
- Department of Applied Chemistry
- College of Science
- Northwestern Polytechnical University
- Xi'an 710072
- China
| | - Qiuyu Zhang
- Department of Applied Chemistry
- College of Science
- Northwestern Polytechnical University
- Xi'an 710072
- China
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50
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Chen Y, Lu Q, Yan X, Mo Q, Chen Y, Liu B, Teng L, Xiao W, Ge L, Wang Q. Enhanced Photocatalytic Activity of the Carbon Quantum Dot-Modified BiOI Microsphere. NANOSCALE RESEARCH LETTERS 2016; 11:60. [PMID: 26842793 PMCID: PMC4740481 DOI: 10.1186/s11671-016-1262-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2015] [Accepted: 01/14/2016] [Indexed: 05/28/2023]
Abstract
Novel carbon quantum dot (CQD)-modified BiOI photocatalysts were prepared via a facile hydrothermal process. The CQD-modified BiOI materials were characterized by multiple techniques. The CQD with an average size around several nanometers was distributed on the surface of BiOI microsphere. Its photocatalytic activity was investigated sufficiently by the photodegradation of methylene orange (MO). The results showed that the CQD/BiOI 1.5 wt.% sample exhibited the optimum photocatalytic activity, which was 2.5 times that of the pure BiOI. This improvement was attributed to the crucial role of CQDs, which could be acted as a photocenter for absorbing solar light, charge separation center for suppressing charge recombination.
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Affiliation(s)
- Yuan Chen
- Research Institute for New Materials Technology, Chongqing University of Arts and Sciences, Yongchuan, Chongqing, 402160, China
- School of Materials Science and Engineering, Chongqing University of Technology, Banan, Chongqing, 400054, China
| | - Qiuju Lu
- Research Institute for New Materials Technology, Chongqing University of Arts and Sciences, Yongchuan, Chongqing, 402160, China
| | - Xuelian Yan
- Research Institute for New Materials Technology, Chongqing University of Arts and Sciences, Yongchuan, Chongqing, 402160, China
- School of Materials Science and Engineering, Chongqing University of Technology, Banan, Chongqing, 400054, China
| | - Qionghua Mo
- Research Institute for New Materials Technology, Chongqing University of Arts and Sciences, Yongchuan, Chongqing, 402160, China
- Faculty of Materials and Energy, Southwest University, Beibei, Chongqing, 400715, China
| | - Yun Chen
- Research Institute for New Materials Technology, Chongqing University of Arts and Sciences, Yongchuan, Chongqing, 402160, China
| | - Bitao Liu
- Research Institute for New Materials Technology, Chongqing University of Arts and Sciences, Yongchuan, Chongqing, 402160, China.
| | - Liumei Teng
- Research Institute for New Materials Technology, Chongqing University of Arts and Sciences, Yongchuan, Chongqing, 402160, China
| | - Wei Xiao
- Research Institute for New Materials Technology, Chongqing University of Arts and Sciences, Yongchuan, Chongqing, 402160, China.
| | - Liangsheng Ge
- Research Institute for New Materials Technology, Chongqing University of Arts and Sciences, Yongchuan, Chongqing, 402160, China
| | - Qinyi Wang
- Department of Chemical Engineering, University of Missouri, Columbia, MO, 65211-2200, USA
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