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Jiang X, Chen C, Chen J, Yu S, Yu W, Shen L, Li B, Zhou M, Lin H. Atomically dispersed dual-atom catalysts: A new rising star in environmental remediation. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 912:169142. [PMID: 38070550 DOI: 10.1016/j.scitotenv.2023.169142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2023] [Revised: 11/28/2023] [Accepted: 12/04/2023] [Indexed: 12/22/2023]
Abstract
Single-atom catalysts, characterized by individual metal atoms as active centers, have emerged as promising candidates owing to their remarkable catalytic efficiency, maximum atomic utilization efficiency, and robust stability. However, the limitation of single-atom catalysts lies in their inability to cater to multistep reactions using a solitary active site. Introducing an additional metal atom can amplify the number of active sites, modulate the electronic structure, bolster adsorption ability, and enable a gamut of core reactions, thus augmenting their catalytic prowess. As such, dual-atom catalysts have risen to prominence. However, a comprehensive review elucidating the realm of dual-atom catalysts in environmental remediation is currently lacking. This review endeavors to bridge this gap, starting with a discourse on immobilization techniques for dual-atom catalysts, which includes configurations such as adjacent atoms, bridged atoms, and co-facially separated atoms. The review then delves into the intrinsic activity mechanisms of these catalysts, elucidating aspects like adsorption dynamics, electronic regulation, and synergistic effects. Following this, a comprehensive summarization of dual-atom catalysts for environmental applications is provided, spanning electrocatalysis, photocatalysis, and Fenton-like reactions. Finally, the existing challenges and opportunities in the field of dual-atom catalysts are extensively discussed. This work aims to be a beacon, illuminating the path towards the evolution and adoption of dual-atom catalysts in environmental remediation.
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Affiliation(s)
- Xialiang Jiang
- College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China
| | - Cheng Chen
- College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China
| | - Junjie Chen
- College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China
| | - Shuning Yu
- College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China
| | - Wei Yu
- College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China
| | - Liguo Shen
- College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China
| | - Bisheng Li
- College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China.
| | - Mingzhu Zhou
- College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China.
| | - Hongjun Lin
- College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China.
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Tian T, Zhang J, Tian L, Ge S, Zhai Z. Photocatalytic Degradation of Gaseous Benzene Using Cu/Fe-Doped TiO 2 Nanocatalysts under Visible Light. Molecules 2023; 29:144. [PMID: 38202726 PMCID: PMC10779467 DOI: 10.3390/molecules29010144] [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: 11/21/2023] [Revised: 12/18/2023] [Accepted: 12/20/2023] [Indexed: 01/12/2024] Open
Abstract
Visible-light-enhanced TiO2 nanocatalysts doped with Cu and Fe were synthesized using the sol-gel method to investigate their performance in degrading gaseous benzene. The structure and morphology of mono- and co-doped TiO2 (i.e., Cu/Fe-TiO2, Cu-Fe-TiO2) were characterized using SEM, EDS, XRD, BET, Raman, UV-vis-DRS, and XPS techniques. The results indicated that the presence of Cu/Fe mono- and co-doped TiO2 leads to the formation of an anatase phase similar to pure TiO2. Furthermore, the introduction of Cu/Fe enhanced the presence of lattice defects and increased the specific surface area of TiO2. This enhancement can be attributed to the increase in oxygen vacancies, especially in the case of Cu-Fe-TiO2. Additionally, Cu-Fe-TiO2 showed a higher concentration of surface-bound hydroxyl groups/chemically adsorbed oxygen and a narrower bandgap than pure TiO2. Consequently, Cu-Fe-TiO2 exhibited the highest photocatalytic performance of 658.33 μgC6H6/(g·h), achieving a benzene degradation rate of 88.87%, surpassing that of pure TiO2 (5.09%), Cu-TiO2 (66.92%), and Fe-TiO2 (59.99%). Reusability tests demonstrated that Cu-Fe-TiO2 maintained a high benzene degradation efficiency of 71.4%, even after five experimental cycles, highlighting its exceptional stability and reusability. In summary, the addition of Cu/Fe to TiO2 enhances its ability to degrade gaseous benzene by prolonging the catalyst's lifespan and expanding its photoresponse range to include visible light.
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Affiliation(s)
- Tao Tian
- School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou 221000, China; (T.T.); (J.Z.); (S.G.)
| | - Jie Zhang
- School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou 221000, China; (T.T.); (J.Z.); (S.G.)
| | - Lijiang Tian
- School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou 221000, China; (T.T.); (J.Z.); (S.G.)
| | - Sijie Ge
- School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou 221000, China; (T.T.); (J.Z.); (S.G.)
| | - Zhenyu Zhai
- Sinoma International Intelligent Technology Co., Nanjing 221122, China;
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Guo J, Guo X, Yang H, Zhang D, Jiang X. Construction of Bio-TiO 2/Algae Complex and Synergetic Mechanism of the Acceleration of Phenol Biodegradation. MATERIALS (BASEL, SWITZERLAND) 2023; 16:ma16103882. [PMID: 37241509 DOI: 10.3390/ma16103882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Revised: 05/15/2023] [Accepted: 05/19/2023] [Indexed: 05/28/2023]
Abstract
Microalgae have been widely employed in water pollution treatment since they are eco-friendly and economical. However, the relatively slow treatment rate and low toxic tolerance have seriously limited their utilization in numerous conditions. In light of the problems above, a novel biosynthetic titanium dioxide (bio-TiO2 NPs)-microalgae synergetic system (Bio-TiO2/Algae complex) has been established and adopted for phenol degradation in the study. The great biocompatibility of bio-TiO2 NPs ensured the collaboration with microalgae, improving the phenol degradation rate by 2.27 times compared to that with single microalgae. Remarkably, this system increased the toxicity tolerance of microalgae, represented as promoted extracellular polymeric substances EPS secretion (5.79 times than single algae), and significantly reduced the levels of malondialdehyde and superoxide dismutase. The boosted phenol biodegradation with Bio-TiO2/Algae complex may be attributed to the synergetic interaction of bio-TiO2 NPs and microalgae, which led to the decreased bandgap, suppressed recombination rate, and accelerated electron transfer (showed as low electron transfer resistance, larger capacitance, and higher exchange current density), resulting in increased light energy utilization rate and photocatalytic rate. The results of the work provide a new understanding of the low-carbon treatment of toxic organic wastewater and lay a foundation for further remediation application.
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Affiliation(s)
- Jinxin Guo
- Tianjin Key Laboratory of Aquatic Science and Technology, School of Environmental and Municipal Engineering, Tianjin Chengjian University, Jinjing Road 26, Tianjin 300384, China
| | - Xiaoman Guo
- Tianjin Key Laboratory of Aquatic Science and Technology, School of Environmental and Municipal Engineering, Tianjin Chengjian University, Jinjing Road 26, Tianjin 300384, China
| | - Haiyan Yang
- Tianjin Key Laboratory of Aquatic Science and Technology, School of Environmental and Municipal Engineering, Tianjin Chengjian University, Jinjing Road 26, Tianjin 300384, China
| | - Daohong Zhang
- Tianjin Key Laboratory of Aquatic Science and Technology, School of Environmental and Municipal Engineering, Tianjin Chengjian University, Jinjing Road 26, Tianjin 300384, China
| | - Xiaogeng Jiang
- School of Mechanical Engineering, Tiangong University, Tianjin 300387, China
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Guo J, Ding C, Gan W, Chen P, Lu Y, Li J, Chen R, Zhang M, Sun Z. High-activity black phosphorus quantum dots/Au/TiO2 ternary heterojunction for efficient levofloxacin removal: Pathways, toxicity assessment, mechanism and DFT calculations. Sep Purif Technol 2023. [DOI: 10.1016/j.seppur.2022.122838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Norouzi M, Fazeli A, Tavakoli O. Photocatalytic degradation of phenol under visible light using electrospun Ag/TiO2 as a 2D nano-powder: Optimizing calcination temperature and promoter content. ADV POWDER TECHNOL 2022. [DOI: 10.1016/j.apt.2022.103792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
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Weng R, Tian F, Yu Z, Ma J, Lv Y, Xi B. Efficient mineralization of TBBPA via an integrated photocatalytic reduction/oxidation process mediated by MoS 2/SnIn 4S 8 photocatalyst. CHEMOSPHERE 2021; 285:131542. [PMID: 34329122 DOI: 10.1016/j.chemosphere.2021.131542] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 06/17/2021] [Accepted: 07/10/2021] [Indexed: 06/13/2023]
Abstract
Currently, Tetrabromobisphenol A (TBBPA) has been regarded as an emerging organic pollutant and efficient TBBPA elimination technology has been attracting increasing attention. In this work, a novel photocatalyst, MoS2/SnIn4S8, was synthesized through hydrothermal method by introducing few-layer MoS2 nanosheets and then employed to establish an integrated photocatalytic reduction/oxidation system for the remediation of TBBPA under visible light. The characterization results demonstrated that the few-layer MoS2 nanosheets were well combined with SnIn4S8 and significantly lowered the recombination rate of the photo-induced electron and holes, leading to outstanding photocatalytic performance of MoS2/SnIn4S8 composite. Besides, the MoS2/SnIn4S8 composite also exhibited excellent reusability (over 10 runs) and stability. The TBBPA degradation experiments showed that the integrated photocatalytic reduction/oxidation system was able to completely degrade TBBPA and mineralize its byproducts (60.2 ± 2.9%). In the photocatalytic reduction, due to the cleavage of C-Br bonds by photo-induced electrons, TBBPA underwent stepwise debromination and finally transferred into BPA in 6 h. In the following photocatalytic oxidation, under the attack of reactive oxygen species (1O2, h+,OH and O2-), BPA was first decomposed into aromatic products (such as phenol, benzoic acid, p-hydroxybenzyl alcohol and so on) via C-C bond cracking and hydroxylation, and then further oxidized into organic acids like maleic acid and muconic acid through ring-opening, and finally mineralized into CO2 and H2O. What was noteworthy was that the final effluent from the photocatalytic reduction/oxidation system showed no toxicity to the luminescent bacteria.
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Affiliation(s)
- Rengui Weng
- Indoor Environment Engineering Research Center of Fujian Province, Fujian University of Technology, Fuzhou, 350118, China.
| | - Feng Tian
- Indoor Environment Engineering Research Center of Fujian Province, Fujian University of Technology, Fuzhou, 350118, China.
| | - Zhendong Yu
- Fujian Provincial Engineering Research Center of Rural Waste Recycling Technology, Department of Environmental Science and Engineering, Fuzhou University, Fuzhou, 350116, China.
| | - Jiachen Ma
- Fujian Provincial Engineering Research Center of Rural Waste Recycling Technology, Department of Environmental Science and Engineering, Fuzhou University, Fuzhou, 350116, China.
| | - Yuancai Lv
- Fujian Provincial Engineering Research Center of Rural Waste Recycling Technology, Department of Environmental Science and Engineering, Fuzhou University, Fuzhou, 350116, China.
| | - Beidou Xi
- Indoor Environment Engineering Research Center of Fujian Province, Fujian University of Technology, Fuzhou, 350118, China.
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Lou S, Chen Q, Wang W, Wang Y, Zhou S. Template-assisted synthesis of Ag/AgCl hollow microcubes and their composition-dependent photocatalytic activity for the degradation of phenol. RSC Adv 2021; 11:26311-26318. [PMID: 35479460 PMCID: PMC9037391 DOI: 10.1039/d1ra03569j] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Accepted: 07/13/2021] [Indexed: 01/16/2023] Open
Abstract
Plasmonic photocatalysts with hollow structures and tunable composition exhibit significant advantages due to their high efficiency in light collection and effective charge transfer across the tight contact heterojunction interface. Herein, hollow Ag/AgCl microcubes were developed by treating nanosheet-assembled hollow Ag microcubes with FeCl3, where a part of Ag at the interface could be in situ transformed and oxidized into AgCl. Equally, by adjusting the concentration of Fe3+ ions, Ag/AgCl hollow microcubes with different compositions could be easily achieved. Electron transfer was favored by a lot of tiny Ag/AgCl heterojunctions induced by the in situ oxidation of the multicrystalline Ag hollow microcube template containing a number of grain boundaries. The designed hollow Ag/AgCl microcubes exhibited strong visible-light adsorption owing to the surface plasmon resonance effect of Ag nanoparticles, in addition to the multiple light-reflections inside the hollow structure. The as-obtained products were then used as visible-light photocatalysts, where the results indicated that 91.6% of phenol was degraded within 150 min under visible light by the as-obtained sample with a Ag to AgCl ratio of 1 : 3. The superior visible-light photocatalytic activity resulted from the enhancement of the visible light-harvesting and the efficient charge separation at the Ag and AgCl contact interfaces. Ag/AgCl hollow microcubes with enhanced visible-light photocatalytic activity were synthesized by the template method, and the charge transfer process was proposed.![]()
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Affiliation(s)
- Shiyun Lou
- Key Laboratory for Special Functional Materials of the Ministry of Education, Henan University Kaifeng 475004 PR China +86 371 22357375
| | - Qinglan Chen
- Key Laboratory for Special Functional Materials of the Ministry of Education, Henan University Kaifeng 475004 PR China +86 371 22357375
| | - Wan Wang
- Key Laboratory for Special Functional Materials of the Ministry of Education, Henan University Kaifeng 475004 PR China +86 371 22357375
| | - Yongqiang Wang
- Key Laboratory for Special Functional Materials of the Ministry of Education, Henan University Kaifeng 475004 PR China +86 371 22357375
| | - Shaomin Zhou
- Key Laboratory for Special Functional Materials of the Ministry of Education, Henan University Kaifeng 475004 PR China +86 371 22357375
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Cherifi Y, Barras A, Addad A, Ouddane B, Roussel P, Chaouchi A, Szunerits S, Boukherroub R. Simultaneous photocatalytic Cr(VI) reduction and phenol degradation over copper sulphide-reduced graphene oxide nanocomposite under visible light irradiation: Performance and reaction mechanism. CHEMOSPHERE 2021; 268:128798. [PMID: 33153848 DOI: 10.1016/j.chemosphere.2020.128798] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Revised: 10/23/2020] [Accepted: 10/26/2020] [Indexed: 06/11/2023]
Abstract
The contamination of water by synthetic organic molecules and trace metals is a growing challenge, in spite of the enormous research efforts being made in the field of water treatment. In this study, reduced graphene oxide-copper sulphide (rGO-CuS) nanocomposites of different rGO/CuS (2/1, 1/1, 1/2) molar ratios were fabricated via a facile one-step hydrothermal method. The nanocomposite materials, named hereafter as 2rGO-CuS, rGO-CuS and rGO-2CuS, were characterized using various analytical techniques, including X-ray diffraction (XRD), Raman spectroscopy, transmission electron microscopy (TEM), energy dispersive X-ray (EDX) spectroscopy, X-ray photoelectron spectroscopy (XPS) and UV-visible spectrophotometry. The photocatalytic performance of the nanocomposites was assessed under visible light irradiation (λ > 420 nm) for the simultaneous photocatalytic reduction of Cr(VI) and phenol degradation. It was found that rGO-2CuS achieved a remarkable enhancement of the photocatalytic activity among the prepared nanocomposites for the degradation of phenol and reduction of Cr(VI). Therefore, the simultaneous photocatalytic phenol degradation and Cr(VI) reduction over rGO-2CuS sample was further investigated. The experimental results revealed that rGO-2CuS catalyst maintained good degradation efficacy of mixed pollutants after 6 runs and dissolved oxygen was found to be essential to promote Cr(VI) reduction and phenol degradation. A detailed photocatalytic activity under visible light irradiation mechanism was proposed based on quenching experiments and fluorescence measurements.
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Affiliation(s)
- Yacine Cherifi
- Univ. Lille, CNRS, Centrale Lille, Univ. Polytechnique Hauts-de-France, UMR 8520 - IEMN, F-59000, Lille, France; Laboratoire de Chimie Appliquée et Génie Chimique de l'Université Mouloud Mammeri de Tizi-Ouzou, Algeria
| | - Alexandre Barras
- Univ. Lille, CNRS, Centrale Lille, Univ. Polytechnique Hauts-de-France, UMR 8520 - IEMN, F-59000, Lille, France
| | - Ahmed Addad
- Univ. Lille, CNRS, UMR 8207 - UMET, F-59000, Lille, France
| | - Baghdad Ouddane
- Univ. Lille, UMR CNRS 8516 - LASIRE Laboratoire Avancé de Spectroscopie pour les Interactions, la Réactivité et l'Environnement, F-59655, Villeneuve d'Ascq, France
| | - Pascal Roussel
- Univ. Lille, CNRS, ENSCL, Centrale Lille, Univ. Artois, UMR8181, UCCS-Unité de Catalyse et Chimie du Solide, Lille, F-59000, France
| | - Ahcène Chaouchi
- Laboratoire de Chimie Appliquée et Génie Chimique de l'Université Mouloud Mammeri de Tizi-Ouzou, Algeria
| | - Sabine Szunerits
- Univ. Lille, CNRS, Centrale Lille, Univ. Polytechnique Hauts-de-France, UMR 8520 - IEMN, F-59000, Lille, France
| | - Rabah Boukherroub
- Univ. Lille, CNRS, Centrale Lille, Univ. Polytechnique Hauts-de-France, UMR 8520 - IEMN, F-59000, Lille, France.
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Diao ZH, Dong FX, Yan L, Chen ZL, Guo PR, Xia XJ, Chu W. A new insight on enhanced Pb(II) removal by sludge biochar catalyst coupling with ultrasound irradiation and its synergism with phenol removal. CHEMOSPHERE 2021; 263:128287. [PMID: 33297231 DOI: 10.1016/j.chemosphere.2020.128287] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Revised: 08/31/2020] [Accepted: 09/05/2020] [Indexed: 06/12/2023]
Abstract
The applicability of sludge biochar catalyst (SBC) coupling with ultrasound (US) irradiation for the simultaneous removal of Pb(II) and phenol was firstly investigated in this study. Results indicate that Pb(II) removal of SBC/US process was superior to that of SBC without US. The inhibitory order of the coexisting anions on Pb(II) removal was PO43- > HCO3- > NO3- > F- > SO42- > Cl-. Also, several coexisting metals ions inculding Cr(VI), Ni(II) and Cu(II) could be removed in a simultaneous manner with Pb(II). A high removal performance of Pb(II) by SBC/US process and its synergism with phenol oxidation had been successfully achieved. The simultaneous removal efficiencies of Pb(II) and phenol were high up to 95% within 60 min at optimum reaction conditions. Four kinds of Pb species inculding Pb0, PbCO3, PbO and Pb(OH)2 were formed during the reaction, whereas five kinds of transformation compounds of phenol such as 1,4-benzoquinone, acetic acid, formic acid, maleic acid and propionic acid were detected. Both HO and O2- contributed to the oxidation of phenol by SBC/US process, but HO was dominant radical. A reaction mechanism for the synergistic removal of Pb(II) and phenol by SBC/US process involving in four stages-namely adsorption, precipitation, reduction and Fenton-like oxidation processes was proposed. This study demonstrates that SBC/US process could be considered as a potential candidate for the remediation of real wastewaters containing Pb(II) and phenol.
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Affiliation(s)
- Zeng-Hui Diao
- Zhongkai University of Agriculture and Engineering, Guangzhou, 510225, China; Hong Kong Polytechnic University, Hong Kong; Engineering and Technology Research Center for Agricultural Land Pollution Prevention and Control of Guangdong Higher Education Institutes, Guangzhou, 510225, China.
| | - Fu-Xin Dong
- Zhongkai University of Agriculture and Engineering, Guangzhou, 510225, China
| | - Liu Yan
- Zhongkai University of Agriculture and Engineering, Guangzhou, 510225, China
| | - Zhi-Liang Chen
- South China Institute of Environmental Sciences, Guangzhou, 510635, China
| | - Peng-Ran Guo
- Guangdong Provincial Key Laboratory of Emergency Test for Dangerous Chemicals, Guangdong Institute of Analysis, Guangzhou, 510070, China
| | - Xiao-Jie Xia
- Zhongkai University of Agriculture and Engineering, Guangzhou, 510225, China
| | - Wei Chu
- Hong Kong Polytechnic University, Hong Kong.
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Li Y, Wang L, Xiao Y, Tian G, Tian C, Fu H. In situ intercalation and exploitation of Co 3O 4 nanoparticles grown on carbon nitride nanosheets for highly efficient degradation of methylene blue. Dalton Trans 2020; 49:14665-14672. [PMID: 33063805 DOI: 10.1039/d0dt02982c] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The low surface area, poor electrical conductivity, and rapid electron-hole recombination in bulk C3N4 limit its photocatalytic activity, which makes it challenging to improve the performance of bulk C3N4. Herein, an effective strategy is proposed to fabricate Co3O4/C3N4 heterojunctions (Co3O4 nanoparticles grown on C3N4 nanosheets), where bulk C3N4 is exfoliated to thin nanosheets. The bulk C3N4 precursor was synthesized with the hydrothermal treatment of melamine solution, and Co2+ ions were then inserted into the interlayer of the precursor through a vacuum-assisted intercalation process. Subsequently, the precursor was exfoliated to C3N4 nanosheets, and 15 nm Co3O4 nanoparticles were simultaneously formed using in situ thermal polycondensation. The Brunauer-Emmett-Teller (BET) specific surface area of the prepared heterojunction was 21 times higher than that of bulk C3N4, and thus more active sites were exposed on the surface of the heterostructure. Co3O4 nanoparticles contained oxygen vacancies, and the type-II transfer mechanism between these nanoparticles and C3N4 could be used to effectively separate photogenic carriers and improve the electron mobility. As expected, the heterostructure exhibited an excellent photocatalyzed degradation rate of 99.5% for methylene blue within 30 min (10 mg catalyst, wavelength >420 nm) under visible light irradiation, which was nearly three times higher than that of bulk C3N4. Electron paramagnetic resonance (EPR) analysis indicated that ˙O2- was the main reactive oxidizing species during the degradation process.
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Affiliation(s)
- Yan Li
- Key Laboratory of Functional Inorganic Materials Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080, China.
| | - Lei Wang
- Key Laboratory of Functional Inorganic Materials Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080, China.
| | - Yuting Xiao
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang, Jiangxi 330063, China
| | - Guohui Tian
- Key Laboratory of Functional Inorganic Materials Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080, China.
| | - Chungui Tian
- Key Laboratory of Functional Inorganic Materials Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080, China.
| | - Honggang Fu
- Key Laboratory of Functional Inorganic Materials Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080, China.
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Jian Y, Liu H, Zhu J, Zeng Y, Liu Z, Hou C, Pu S. Transformation of novel TiOF2 nanoparticles to cluster TiO2-{001/101} and its degradation of tetracycline hydrochloride under simulated sunlight. RSC Adv 2020; 10:42860-42873. [PMID: 35514916 PMCID: PMC9058001 DOI: 10.1039/d0ra08476j] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Accepted: 11/19/2020] [Indexed: 11/21/2022] Open
Abstract
The anatase type cluster TiO2-{001/101} was rapidly generated by a one-step hydrothermal method. The transformation process of coral-like TiOF2 nanoparticles to cluster TiO2-{001/101} was investigated for the first time, and the sensitization between cluster TiO2-{001/101} and tetracycline hydrochloride (TCH) was also discussed. The degradation rate of TCH by cluster TiO2-{001/101} under simulated sunlight was 92.3%, and the total removal rate was 1.76 times that of P25. Besides, cluster TiO2-{001/101} settles more easily than P25 in deionized water. The study showed that cluster TiO2-{001/101} derived from coral-like TiOF2 nanoparticles had a strong adsorption effect on TCH, which was attributed to the oxygen vacancy (Ov) and {001} facets of cluster TiO2-{001/101}. The strong adsorption effect promoted the sensitization between cluster TiO2-{001/101} and TCH, and widened the visible light absorption range of cluster TiO2-{001/101}. In addition, the fluorescence emission spectrum showed that cluster TiO2-{001/101} had a lower luminous intensity, which was attributed to the heterojunction formed by {001} facets and {101} facets that reduces the recombination rate of carriers. It should be noted that cluster TiO2-{001/101} still has good degradation performance for TCH after five cycles of degradation. This study provides a new idea for the synthesis of cluster TiO2-{001/101} with high photocatalytic performance for the treatment of TCH wastewater. Degradation of tetracycline hydrochloride by cluster TiO2-{001/101} under simulated sunlight.![]()
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Affiliation(s)
- Yue Jian
- Chongqing Academy of Animal Sciences
- Chongqing 402460
- China
- Scientific Observation and Experiment Station of Livestock Equipment Engineering in Southwest
- Ministry of Agriculture and Rural Affairs
| | - Huayang Liu
- College of Geology and Environment
- Xi'an University of Science and Technology
- Xi'an 710054
- China
| | - Jiaming Zhu
- Chongqing Academy of Animal Sciences
- Chongqing 402460
- China
- Scientific Observation and Experiment Station of Livestock Equipment Engineering in Southwest
- Ministry of Agriculture and Rural Affairs
| | - Yaqiong Zeng
- Chongqing Academy of Animal Sciences
- Chongqing 402460
- China
- Scientific Observation and Experiment Station of Livestock Equipment Engineering in Southwest
- Ministry of Agriculture and Rural Affairs
| | - Zuohua Liu
- Chongqing Academy of Animal Sciences
- Chongqing 402460
- China
| | - Chentao Hou
- College of Geology and Environment
- Xi'an University of Science and Technology
- Xi'an 710054
- China
| | - Shihua Pu
- Chongqing Academy of Animal Sciences
- Chongqing 402460
- China
- Scientific Observation and Experiment Station of Livestock Equipment Engineering in Southwest
- Ministry of Agriculture and Rural Affairs
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