1
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Yang J, Yang W, Zhang C, Gong J, Xu M, Li J, Liu C. Synergistic self-driven and heterogeneous effect of a biomass-derived urchin-like Mn 3O 4/C 3N 4 Janus micromotor catalyst for efficient degradation of carbamazepine. RSC Adv 2024; 14:28904-28914. [PMID: 39268053 PMCID: PMC11391418 DOI: 10.1039/d4ra04980b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2024] [Accepted: 08/09/2024] [Indexed: 09/15/2024] Open
Abstract
It is well known that obtaining efficient carbamazepine degradation materials or rapid carbamazepine-removal methods is still a challenge in the field of environmental remediation. Hence, the present study aimed to concurrently address these issues by combining a self-driven, heterostructured and low-cost biomass-templated urchin-like Janus micromotor catalyst for highly efficient carbamazepine degradation. The catalyst could autonomously move in a circle-like motion pattern via O2 bubbles generated from the Mn3O4-catalyzed decomposition of H2O2 with a velocity of 223.5 ± 7.0 μm s-1 in 1% H2O2. Benefiting from the well-structured heterojunction at the interface of C3N4 and Mn3O4, carbamazepine (CBZ) was degraded by 61% in 100 min under sunlight irradiation. In addition, density functional theory calculation results proved that the formation of the heterojunction structure promoted the generation of photo-generated carriers. Thus, the presented method provides a promising pathway for the rational construction and preparation of movable catalysts for the efficient removal of organic pollutants from wastewater.
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Affiliation(s)
- Jie Yang
- Department of Pharmaceutical and Bioengineering, Zibo Vocational Institute Zibo 255000 P. R. China
| | - Wenning Yang
- Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology, School of Chemistry and Chemical Engineering, Liaocheng University Liaocheng 252000 P. R. China
| | - Chao Zhang
- School of Artificial Intelligence and Big Data, ZiBo Vocational Institute Zibo 255000 P. R. China
| | - Jian Gong
- Department of Pharmaceutical and Bioengineering, Zibo Vocational Institute Zibo 255000 P. R. China
| | - Ming Xu
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology Beijing 100029 P. R. China
| | - Jia Li
- School of Material Science and Engineering, University of Jinan Jinan 250022 China
| | - Chengzhang Liu
- School of Material Science and Engineering, University of Jinan Jinan 250022 China
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2
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Asif M, Kosar N, Sajid H, Qureshi S, Gilani MA, Ayub K, Arshad M, Imran M, Hamid MHS, Bayach I, Sheikh NS, Mahmood T. Exploring the Sensing Potential of g-C 3N 4 versus Li/g-C 3N 4 Nanoflakes toward Hazardous Organic Volatiles: A DFT Simulation Study. ACS OMEGA 2024; 9:3541-3553. [PMID: 38284053 PMCID: PMC10810007 DOI: 10.1021/acsomega.3c07350] [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: 09/23/2023] [Revised: 12/19/2023] [Accepted: 12/27/2023] [Indexed: 01/30/2024]
Abstract
Ab initio calculations were performed to determine the sensing behavior of g-C3N4 and Li metal-doped g-C3N4 (Li/g-C3N4) quantum dots toward toxic compounds acetamide (AA), benzamide (BA), and their thio-analogues, namely, thioacetamide (TAA) and thiobenzamide (TAA). For optimization and interaction energies, the ωB97XD/6-31G(d,p) level of theory was used. Interaction energies (Eint) illustrate the high thermodynamic stabilities of the designed complexes due to the presence of the noncovalent interactions. The presence of electrostatic forces in some complexes is also observed. The observed trend of Eint in g-C3N4 complexes was BA > TAA > AA > TBA, while in Li/g-C3N4, the trend was BA > AA > TBA > TAA. The electronic properties were studied by frontier molecular orbital (FMO) and natural bond orbital analyses. According to FMO, lithium metal doping greatly enhanced the conductivity of the complexes by generating new HOMOs near the Fermi level. A significant amount of charge transfer was also observed in complexes, reflecting the increase in charge conductivity. NCI and QTAIM analyses evidenced the presence of significant noncovalent dispersion and electrostatic forces in Li/g-C3N4 and respective complexes. Charge decomposition analysis gave an idea of the transfer of charge density between quantum dots and analytes. Finally, TD-DFT explained the optical behavior of the reported complexes. The findings of this study suggested that both bare g-C3N4 and Li/g-C3N4 can effectively be used as atmospheric sensors having excellent adsorbing properties toward toxic analytes.
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Affiliation(s)
- Misbah Asif
- Department
of Chemistry, COMSATS University Islamabad,
Abbottabad Campus, Abbottabad 22060, Pakistan
| | - Naveen Kosar
- Department
of Chemistry, University of Management and
Technology (UMT), C-11, Johar Town, Lahore 54782, Pakistan
| | - Hasnain Sajid
- School
of Science and Technology, Nottingham Trent
University, Clifton Lane, Nottingham NG11 8NS, U.K.
| | - Sana Qureshi
- Department
of Chemistry, COMSATS University Islamabad,
Abbottabad Campus, Abbottabad 22060, Pakistan
| | - Mazhar Amjad Gilani
- Department
of Chemistry, COMSATS University Islamabad,
Lahore Campus, Lahore 54000, Pakistan
| | - Khurshid Ayub
- Department
of Chemistry, COMSATS University Islamabad,
Abbottabad Campus, Abbottabad 22060, Pakistan
| | - Muhammad Arshad
- Institute
of Chemistry, The Islamia University of
Bahawalpur, Baghdad-ul-Jadeed Campus, Bahawalpur 63100, Pakistan
| | - Muhammad Imran
- Department
of Chemistry, Faculty of Science, King Khalid
University, P.O. Box 9004, Abha 61413, Saudi Arabia
| | - Malai Haniti S.
A. Hamid
- Chemical
Sciences, Faculty of Science, Universiti
Brunei Darussalam, Jalan Tungku
Link, Gadong BE1410, Brunei Darussalam
| | - Imene Bayach
- Department
of Chemistry, College of Science, King Faisal
University, Al-Ahsa 31982, Saudi Arabia
| | - Nadeem S. Sheikh
- Chemical
Sciences, Faculty of Science, Universiti
Brunei Darussalam, Jalan Tungku
Link, Gadong BE1410, Brunei Darussalam
| | - Tariq Mahmood
- Department
of Chemistry, COMSATS University Islamabad,
Abbottabad Campus, Abbottabad 22060, Pakistan
- Department
of Chemistry, College of Science, University
of Bahrain, P.O. Box 32038, Sakhir 1054, Bahrain
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3
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Kumar N, Kumari M, Ismael M, Tahir M, Sharma RK, Kumari K, Koduru JR, Singh P. Graphitic carbon nitride (g-C 3N 4)-assisted materials for the detection and remediation of hazardous gases and VOCs. ENVIRONMENTAL RESEARCH 2023; 231:116149. [PMID: 37209982 DOI: 10.1016/j.envres.2023.116149] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Revised: 03/22/2023] [Accepted: 05/13/2023] [Indexed: 05/22/2023]
Abstract
Graphitic carbon nitride (g-C3N4)-based materials are attracting attention for their unique properties, such as low-cost, chemical stability, facile synthesis, adjustable electronic structure, and optical properties. These facilitate the use of g-C3N4 to design better photocatalytic and sensing materials. Environmental pollution by hazardous gases and volatile organic compounds (VOCs) can be monitored and controlled using eco-friendly g-C3N4- photocatalysts. Firstly, this review introduces the structure, optical and electronic properties of C3N4 and C3N4 assisted materials, followed by various synthesis strategies. In continuation, binary and ternary nanocomposites of C3N4 with metal oxides, sulfides, noble metals, and graphene are elaborated. g-C3N4/metal oxide composites exhibited better charge separation that leads to enhancement in photocatalytic properties. g-C3N4/noble metal composites possess higher photocatalytic activities due to the surface plasmon effects of metals. Ternary composites by the presence of dual heterojunctions improve properties of g-C3N4 for enhanced photocatalytic application. In the later part, we have summarised the application of g-C3N4 and its assisted materials for sensing toxic gases and VOCs and decontaminating NOx and VOCs by photocatalysis. Composites of g-C3N4 with metal and metal oxide give comparatively better results. This review is expected to bring a new sketch for developing g-C3N4-based photocatalysts and sensors with practical applications.
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Affiliation(s)
- Naveen Kumar
- Department of Chemistry, Maharshi Dayanand University, Rohtak, 124001, India.
| | - Monika Kumari
- Department of Chemistry, Maharshi Dayanand University, Rohtak, 124001, India
| | - Mohammed Ismael
- Electrical energy storage system, Gottfried Wilhelm Leibniz Universität Hannover, Welfengarten 1, 30167, Hannover, Germany
| | - Muhammad Tahir
- Chemical and Petroleum Engineering Department, UAE University, P.O. Box 15551, Al Ain, United Arab Emirates
| | | | - Kavitha Kumari
- Baba Mastnath University, Asthal Bohar, Rohtak, 124001, India
| | - Janardhan Reddy Koduru
- Department of Environmental Engineering, Kwangwoon University, Seoul, 01897, South Korea
| | - Pardeep Singh
- School of Advanced Chemical Sciences, Shoolini University, Solan, Himachal Pradesh, 173212, India
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4
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Zhang E, Tang J, Li Z, Zhou Y. Insight into the synergistic collaboration of g‐C3N4/SnO2 composites for photoelectrocatalytic CO2 reduction. ChemElectroChem 2022. [DOI: 10.1002/celc.202200134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Erhui Zhang
- Anhui Science and Technology University College ofChemistry and Materials Engineering No.1501, HuangShan Avenue 233000 Bengbu CHINA
| | - Jing Tang
- Anhui Science and Technology University College of Chemistry and Materials Engineering CHINA
| | - Zirong Li
- Anhui Science and Technology University College of Chemistry and Materials Engineering CHINA
| | - Yongsheng Zhou
- Anhui Science and Technology University College of Chemistry and Materials Engineering CHINA
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5
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Van KN, Huu HT, Nguyen Thi VN, Le Thi TL, Truong DH, Truong TT, Dao NN, Vo V, Tran DL, Vasseghian Y. Facile construction of S-scheme SnO 2/g-C 3N 4 photocatalyst for improved photoactivity. CHEMOSPHERE 2022; 289:133120. [PMID: 34863724 DOI: 10.1016/j.chemosphere.2021.133120] [Citation(s) in RCA: 43] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Revised: 11/10/2021] [Accepted: 11/27/2021] [Indexed: 06/13/2023]
Abstract
The SnO2/g-C3N4 composites were fabricated via an annealing mixture of g-C3N4 and SnO2, which were obtained from calcinating melamine and hydrothermal treatment of SnCl4 solution, respectively. The photocatalytic properties of g-C3N4/SnO2 were studied over the degradation of Rhodamine B (RhB) under visible light, which exhibits a significantly improved photocatalytic activity compared to the single components, g-C3N4 and SnO2. The enhancement in photocatalytic activity of SnO2/g-C3N4 could be described by the S-scheme pathway, in which the effective charge transfer between components is demonstrated toward the suppression in recombination of the photogenerated electron-hole pairs within redox potential conservation. Besides, a new criterion, photochemical space-time yield, was applied to evaluate the photocatalytic performance of our samples.
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Affiliation(s)
- Kim Nguyen Van
- Faculty of Natural Sciences, Quy Nhon University, Quy Nhon, 55000, Binh Dinh, Viet Nam.
| | - Ha Tran Huu
- Faculty of Natural Sciences, Quy Nhon University, Quy Nhon, 55000, Binh Dinh, Viet Nam
| | - Viet Nga Nguyen Thi
- Faculty of Education, Quy Nhon University, Quy Nhon, 55000, Binh Dinh, Viet Nam
| | - Thanh Lieu Le Thi
- Faculty of Natural Sciences, Quy Nhon University, Quy Nhon, 55000, Binh Dinh, Viet Nam
| | | | - Thanh Tam Truong
- Faculty of Natural Sciences, Quy Nhon University, Quy Nhon, 55000, Binh Dinh, Viet Nam
| | - Ngoc Nhiem Dao
- Institute of Materials Science, Vietnam Academy of Science and Technology, 100000, Viet Nam
| | - Vien Vo
- Faculty of Natural Sciences, Quy Nhon University, Quy Nhon, 55000, Binh Dinh, Viet Nam.
| | - Dai Lam Tran
- Institute for Tropical Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Hanoi, 11355, Viet Nam; Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Hanoi, Viet Nam.
| | - Yasser Vasseghian
- Department of Chemical Engineering, Quchan University of Technology, Quchan, Iran.
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6
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Alaghmandfard A, Ghandi K. A Comprehensive Review of Graphitic Carbon Nitride (g-C 3N 4)-Metal Oxide-Based Nanocomposites: Potential for Photocatalysis and Sensing. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:294. [PMID: 35055311 PMCID: PMC8779993 DOI: 10.3390/nano12020294] [Citation(s) in RCA: 58] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Revised: 12/27/2021] [Accepted: 01/05/2022] [Indexed: 02/06/2023]
Abstract
g-C3N4 has drawn lots of attention due to its photocatalytic activity, low-cost and facile synthesis, and interesting layered structure. However, to improve some of the properties of g-C3N4, such as photochemical stability, electrical band structure, and to decrease charge recombination rate, and towards effective light-harvesting, g-C3N4-metal oxide-based heterojunctions have been introduced. In this review, we initially discussed the preparation, modification, and physical properties of the g-C3N4 and then, we discussed the combination of g-C3N4 with various metal oxides such as TiO2, ZnO, FeO, Fe2O3, Fe3O4, WO3, SnO, SnO2, etc. We summarized some of their characteristic properties of these heterojunctions, their optical features, photocatalytic performance, and electrical band edge positions. This review covers recent advances, including applications in water splitting, CO2 reduction, and photodegradation of organic pollutants, sensors, bacterial disinfection, and supercapacitors. We show that metal oxides can improve the efficiency of the bare g-C3N4 to make the composites suitable for a wide range of applications. Finally, this review provides some perspectives, limitations, and challenges in investigation of g-C3N4-metal-oxide-based heterojunctions.
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Affiliation(s)
| | - Khashayar Ghandi
- Department of Chemistry, University of Guelph, Guelph, ON N1G 2W1, Canada;
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7
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Effect of thermal program on structure–activity relationship of g-C3N4 prepared by urea pyrolysis and its application for controllable production of g-C3N4. J SOLID STATE CHEM 2021. [DOI: 10.1016/j.jssc.2021.122545] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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8
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Pradhan MR, Rath D, Sethi R, Nanda BB, Nanda B. α-MnO2 modified exfoliated porous g-C3N4 nanosheet (2D) for enhanced photocatalytic oxidation efficiency of aromatic alcohols. INORG CHEM COMMUN 2021. [DOI: 10.1016/j.inoche.2021.108717] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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9
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Morphological Effects in SnO 2 Chemiresistors for Ethanol Detection: A Review in Terms of Central Performances and Outliers. SENSORS 2020; 21:s21010029. [PMID: 33374606 PMCID: PMC7793099 DOI: 10.3390/s21010029] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Revised: 12/19/2020] [Accepted: 12/21/2020] [Indexed: 12/26/2022]
Abstract
SnO2 is one of the most studied materials in gas sensing and is often used as a benchmark for other metal oxide-based gas sensors. To optimize its structural and functional features, the fine tuning of the morphology in nanoparticles, nanowires, nanosheets and their eventual hierarchical organization has become an active field of research. In this paper, the different SnO2 morphologies reported in literature in the last five years are systematically compared in terms of response amplitude through a statistical approach. To have a dataset as homogeneous as possible, which is necessary for a reliable comparison, the analysis is carried out on sensors based on pure SnO2, focusing on ethanol detection in a dry air background as case study. Concerning the central performances of each morphology, results indicate that none clearly outperform the others, while a few individual materials emerge as remarkable outliers with respect to the whole dataset. The observed central performances and outliers may represent a suitable reference for future research activities in the field.
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10
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Montazeri S, Sadrnezhaad SK. Kinetics of Sulfur Removal from Tehran Vehicular Gasoline by g-C 3N 4/SnO 2 Nanocomposite. ACS OMEGA 2019; 4:13180-13188. [PMID: 31460445 PMCID: PMC6705198 DOI: 10.1021/acsomega.9b01191] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Accepted: 07/24/2019] [Indexed: 05/31/2023]
Abstract
The graphitic carbon nitride/tin oxide (g-C3N4/SnO2) nanocomposite synthesized under microwave irradiation was used for adsorptive removal of sulfur-containing dibenzothiophene (DBT) from Tehran vehicular gasoline. High-resolution transmission electron microscopy, X-ray powder diffraction, energy dispersive X-ray spectroscopy, Brunauer-Emmett-Teller, Fourier-transform infrared spectroscopy, and field emission scanning electron microscopy techniques determined the adsorbent characteristics, and gas chromatography with a flame ionization detector determined the DBT concentration of the samples. Application of the experimental data into the solid/fluid kinetic models indicated a chemisorption control regime that increased the removal of sulfur from the commercial samples used. A pseudo-second-order reaction with the rate constant of 0.015 (g mg-1 min-1) and total conversion time of 316 min described the adsorption process. Based on the real fuel results, the adsorption capacity of the g-C3N4/SnO2 adsorbent reached 10.64 mg S g-1 adsorbent at equilibrium conditions. This value was the highest adsorption capacity obtained so far for a commercial gasoline sample. The g-C3N4/SnO2 nanocomposite could, therefore, be introduced as an inexpensive, easily obtainable adsorbent that can significantly remove the sulfur from the vehicular gasoline fuels.
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11
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Li X, Li Y, Sun G, Luo N, Zhang B, Zhang Z. Synthesis of a Flower-Like g-C 3N 4/ZnO Hierarchical Structure with Improved CH 4 Sensing Properties. NANOMATERIALS 2019; 9:nano9050724. [PMID: 31083416 PMCID: PMC6567125 DOI: 10.3390/nano9050724] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Revised: 05/06/2019] [Accepted: 05/07/2019] [Indexed: 11/16/2022]
Abstract
In this paper, a hierarchical structure of graphite carbon nitride (g-C3N4) modified ZnO (g-C3N4/ZnO) was synthesized using a simple precipitation-calcination method. Through this method, g-C3N4 nanosheets with a controlled content were successfully decorated on the petals of flower-like ZnO. Various techniques were used to confirm the successful formation of the g-C3N4/ZnO hierarchical structure. The methane (CH4) sensing properties of g-C3N4/ZnO sensor were investigated. The result exhibited that after decorating ZnO with g-C3N4, the CH4 sensing performances of the fabricated sensor were remarkably improved. At the optimum operating temperature of 320 °C, the response of the sensor fabricated with CNZ-3 (the sample with an optimum content of g-C3N4) towards 1000 ppm CH4 was as high as 11.9 (Ra/Rg), which was about 2.2 times higher than that of the pure ZnO sensor (5.3). In addition, the CNZ-3 sensor also exhibited a fast response/recovery speed (15/28 s) and outstanding long-term stability. The enhancing CH4 sensing mechanism may be contributed to enlarged surface area, pore structure, and g-C3N4-ZnO n-n junction.
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Affiliation(s)
- Xiaojie Li
- School of Materials Science and Engineering, Cultivating Base for Key Laboratory of Environment-Friendly Inorganic Materials in University of Henan Province, Henan Polytechnic University, Jiaozuo 454000, China.
| | - Yanwei Li
- School of Materials Science and Engineering, Cultivating Base for Key Laboratory of Environment-Friendly Inorganic Materials in University of Henan Province, Henan Polytechnic University, Jiaozuo 454000, China.
| | - Guang Sun
- School of Materials Science and Engineering, Cultivating Base for Key Laboratory of Environment-Friendly Inorganic Materials in University of Henan Province, Henan Polytechnic University, Jiaozuo 454000, China.
- State Key Laboratory Cultivation Bases Gas Geology and Gas Control, Henan Polytechnic University, Jiaozuo 454000, China.
| | - Na Luo
- School of Materials Science and Engineering, Cultivating Base for Key Laboratory of Environment-Friendly Inorganic Materials in University of Henan Province, Henan Polytechnic University, Jiaozuo 454000, China.
| | - Bo Zhang
- School of Materials Science and Engineering, Cultivating Base for Key Laboratory of Environment-Friendly Inorganic Materials in University of Henan Province, Henan Polytechnic University, Jiaozuo 454000, China.
| | - Zhanying Zhang
- School of Materials Science and Engineering, Cultivating Base for Key Laboratory of Environment-Friendly Inorganic Materials in University of Henan Province, Henan Polytechnic University, Jiaozuo 454000, China.
- State Key Laboratory Cultivation Bases Gas Geology and Gas Control, Henan Polytechnic University, Jiaozuo 454000, China.
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12
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Triazine-based graphitic carbon nitride: controllable synthesis and enhanced cataluminescent sensing for formic acid. Anal Bioanal Chem 2018; 410:7499-7509. [DOI: 10.1007/s00216-018-1368-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Revised: 08/10/2018] [Accepted: 09/06/2018] [Indexed: 01/26/2023]
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13
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Zhang R, Jia JB, Cao JL, Wang Y. SnO 2/Graphene Nanoplatelet Nanocomposites: Solid-State Method Synthesis With High Ethanol Gas-Sensing Performance. Front Chem 2018; 6:337. [PMID: 30140673 PMCID: PMC6095040 DOI: 10.3389/fchem.2018.00337] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Accepted: 07/19/2018] [Indexed: 11/13/2022] Open
Affiliation(s)
- Run Zhang
- The Collaboration Innovation Center of Coal Safety Production of Henan Province, Henan Polytechnic University, Jiaozuo, China.,Department of Chemical Engineering and Technology, College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo, China
| | - Jian-Bo Jia
- The Collaboration Innovation Center of Coal Safety Production of Henan Province, Henan Polytechnic University, Jiaozuo, China.,Department of Chemical Engineering and Technology, College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo, China
| | - Jian-Liang Cao
- The Collaboration Innovation Center of Coal Safety Production of Henan Province, Henan Polytechnic University, Jiaozuo, China.,Department of Chemical Engineering and Technology, College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo, China
| | - Yan Wang
- The Collaboration Innovation Center of Coal Safety Production of Henan Province, Henan Polytechnic University, Jiaozuo, China.,School of Safety Science and Engineering, State Key Laboratory Cultivation Base for Gas Geology and Gas Control, Henan Polytechnic University, Jiaozuo, China
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14
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Highly Sensitive Acetone Gas Sensor Based on g-C₃N₄ Decorated MgFe₂O₄ Porous Microspheres Composites. SENSORS 2018; 18:s18072211. [PMID: 29996480 PMCID: PMC6068867 DOI: 10.3390/s18072211] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/03/2018] [Revised: 07/02/2018] [Accepted: 07/06/2018] [Indexed: 11/17/2022]
Abstract
The g-C3N4 decorated magnesium ferrite (MgFe2O4) porous microspheres composites were successfully obtained via a one-step solvothermal method. The structure and morphology of the as-prepared MgFe2O4/g-C3N4 composites were characterized by the techniques of X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), thermal gravity and differential scanning calorimeter (TG–DSC) and N2-sorption. The gas sensing properties of the samples were measured and compared with a pure MgFe2O4-based sensor. The maximum response of the sensor based on MgFe2O4/g-C3N4 composites with 10 wt % g-C3N4 content to acetone is improved by about 145 times, while the optimum temperature was lowered by 60 °C. Moreover, the sensing mechanism and the reason for improving gas sensing performance were also discussed.
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15
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Gong Y, Wang Y, Sun G, Jia T, Jia L, Zhang F, Lin L, Zhang B, Cao J, Zhang Z. Carbon Nitride Decorated Ball-Flower like Co₃O₄ Hybrid Composite: Hydrothermal Synthesis and Ethanol Gas Sensing Application. NANOMATERIALS (BASEL, SWITZERLAND) 2018; 8:E132. [PMID: 29495469 PMCID: PMC5869623 DOI: 10.3390/nano8030132] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Revised: 02/21/2018] [Accepted: 02/22/2018] [Indexed: 12/19/2022]
Abstract
Recently, semiconducting metal oxide (SMO) gas sensors have attracted the attention of researchers for high conductivity, labile features by environment, low cost, easy preparation, etc. However, traditional SMOs have some defects such as higher operating temperature and lower response value, which greatly limit their application in the field of gas sensor. In this work, the carbon nitride decorated ball-flower like Co₃O₄ composite was successfully synthesized via a facile hydrothermal method, the composition and morphology of the as-synthesized samples were studied by the techniques of X-ray powder diffraction (XRD), Field-emission scanning electron microscopy (FESEM), Transmission electron microscopy (TEM), Fourier transform infrared spectrometer (FT-IR) and N₂-sorption. As a consequence, the pure Co₃O₄ and the carbon nitride decorated Co₃O₄ both possess ball-flower like structure, and the as-synthesized carbon nitride decorated Co₃O₄ composite exhibits significant sensing properties to ethanol which is 1.6 times higher than that of pure Co₃O₄, furthermore, the composite possesses high selectivity and stability towards ethanol detection.
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Affiliation(s)
- Yuxiao Gong
- School of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo 454000, China.
| | - Yan Wang
- The Collaboration Innovation Center of Coal Safety Production of Henan Province, Jiaozuo 454000, China.
- State Key Laboratory Cultivation Bases Gas Geology and Gas Control (Henan Polytechnic University), Jiaozuo 454000, China.
| | - Guang Sun
- School of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo 454000, China.
| | - Tiekun Jia
- Department of Materials Science and Engineering, Luoyang Institute of Science and Technology, Luoyang 471023, China.
| | - Lei Jia
- School of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo 454000, China.
| | - Fengmei Zhang
- School of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo 454000, China.
| | - Long Lin
- School of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo 454000, China.
| | - Baoqing Zhang
- School of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo 454000, China.
| | - Jianliang Cao
- School of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo 454000, China.
| | - Zhanying Zhang
- School of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo 454000, China.
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16
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Zhao Y, Li Y, Ren X, Gao F, Zhao H. The Effect of Eu Doping on Microstructure, Morphology and Methanal-Sensing Performance of Highly Ordered SnO₂ Nanorods Array. NANOMATERIALS 2017; 7:nano7120410. [PMID: 29168796 PMCID: PMC5746900 DOI: 10.3390/nano7120410] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/11/2017] [Revised: 11/08/2017] [Accepted: 11/14/2017] [Indexed: 11/23/2022]
Abstract
Layered Eu-doped SnO2 ordered nanoarrays constructed by nanorods with 10 nm diameters and several hundred nanometers length were synthesized by a substrate-free hydrothermal route using alcohol and water mixed solvent of sodium stannate and sodium hydroxide at 200 °C. The Eu dopant acted as a crystal growth inhibitor to prevent the SnO2 nanorods growth up, resulting in tenuous SnO2 nanorods ordered arrays. The X-ray diffraction (XRD) revealed the tetragonal rutile-type structure with a systematic average size reduction and unit cell volume tumescence, while enhancing the residual strain as the Eu-doped content increases. The surface defects that were caused by the incorporation of Eu ions within the surface oxide matrix were observed by high-resolution transmission electron microscope (HRTEM). The results of the response properties of sensors based on the different levels of Eu-doped SnO2 layered nanoarrays demonstrated that the 0.5 at % Eu-doped SnO2 layered nanorods arrays exhibited an excellent sensing response to methanal at 278 °C. The reasons of the enhanced sensing performance were discussed from the complicated defect surface structure, the large specific surface area, and the excellent catalytic properties of Eu dopant.
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Affiliation(s)
- Yanping Zhao
- College of Materials Science and Engineering, Yunnan University, Kunming 650091, China.
| | - Yuehua Li
- Advanced Measurement and Analysis Center of Dali University, Dali 671200, China.
| | - Xingping Ren
- Yunnan Security and Technology Co. Ltd., Kunming 650033, China.
| | - Fan Gao
- College of Materials Science and Engineering, Yunnan University, Kunming 650091, China.
| | - Heyun Zhao
- College of Materials Science and Engineering, Yunnan University, Kunming 650091, China.
- Yunnan Key Laboratory for Micro/Nano Materials and Technology, Yunnan University, Kunming 650091, China.
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17
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Wang Y, Cao J, Qin C, Zhang B, Sun G, Zhang Z. Synthesis and Enhanced Ethanol Gas Sensing Properties of the g-C₃N₄ Nanosheets-Decorated Tin Oxide Flower-Like Nanorods Composite. NANOMATERIALS 2017; 7:nano7100285. [PMID: 28937649 PMCID: PMC5666450 DOI: 10.3390/nano7100285] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/23/2017] [Revised: 09/16/2017] [Accepted: 09/18/2017] [Indexed: 11/24/2022]
Abstract
Flower-like SnO2/g-C3N4 nanocomposites were synthesized via a facile hydrothermal method by using SnCl4·5H2O and urea as the precursor. The structure and morphology of the as-synthesized samples were characterized by using the X-ray powder diffraction (XRD), electron microscopy (FESEM and TEM), and Fourier transform infrared spectrometer (FT-IR) techniques. SnO2 displays the unique 3D flower-like microstructure assembled with many uniform nanorods with the lengths and diameters of about 400–600 nm and 50–100 nm, respectively. For the SnO2/g-C3N4 composites, SnO2 flower-like nanorods were coupled by a lamellar structure 2D g-C3N4. Gas sensing performance test results indicated that the response of the sensor based on 7 wt. % 2D g-C3N4-decorated SnO2 composite to 500 ppm ethanol vapor was 150 at 340 °C, which was 3.5 times higher than that of the pure flower-like SnO2 nanorods-based sensor. The gas sensing mechanism of the g-C3N4nanosheets-decorated SnO2 flower-like nanorods was discussed in relation to the heterojunction structure between g-C3N4 and SnO2.
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Affiliation(s)
- Yan Wang
- The Collaboration Innovation Center of Coal Safety Production of Henan Province, Jiaozuo 454000, China.
- State Key Laboratory Cultivation Bases Gas Geology and Gas Control (Henan Polytechnic University), Jiaozuo 454000, China.
| | - Jianliang Cao
- School of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo 454000, China.
| | - Cong Qin
- School of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo 454000, China.
| | - Bo Zhang
- School of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo 454000, China.
| | - Guang Sun
- School of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo 454000, China.
| | - Zhanying Zhang
- School of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo 454000, China.
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