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Kurnosenko SA, Silyukov OI, Rodionov IA, Baeva AS, Burov AA, Kulagina AV, Novikov SS, Zvereva IA. Hydrothermally Synthesized ZnCr- and NiCr-Layered Double Hydroxides as Hydrogen Evolution Photocatalysts. Molecules 2024; 29:2108. [PMID: 38731599 PMCID: PMC11085494 DOI: 10.3390/molecules29092108] [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: 02/26/2024] [Revised: 04/30/2024] [Accepted: 04/30/2024] [Indexed: 05/13/2024] Open
Abstract
The layered double hydroxides (LDHs) of transition metals are of great interest as building blocks for the creation of composite photocatalytic materials for hydrogen production, environmental remediation and other applications. However, the synthesis of most LDHs is reported only by the conventional coprecipitation method, which makes it difficult to control the catalyst's crystallinity. In the present study, ZnCr- and NiCr-LDHs have been successfully prepared using a facile hydrothermal approach. Varying the hydrothermal synthesis conditions allowed us to obtain target products with a controllable crystallite size in the range of 2-26 nm and a specific surface area of 45-83 m2∙g-1. The LDHs synthesized were investigated as photocatalysts of hydrogen generation from aqueous methanol. It was revealed that the photocatalytic activity of ZnCr-LDH samples grows monotonically with the increase in their average crystallite size, while that of NiCr-LDH ones reaches a maximum with intermediate-sized crystallites and then decreases due to the specific surface area reduction. The concentration dependence of the hydrogen evolution activity is generally consistent with the standard Langmuir-Hinshelwood model for heterogeneous catalysis. At a methanol content of 50 mol. %, the rate of hydrogen generation over ZnCr- and NiCr-LDHs reaches 88 and 41 μmol∙h-1∙g-1, respectively. The hydrothermally synthesized LDHs with enhanced crystallinity may be of interest for further fabrication of their nanosheets being promising components of new composite photocatalysts.
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Affiliation(s)
| | - Oleg I. Silyukov
- Department of Chemical Thermodynamics and Kinetics, Institute of Chemistry, Saint Petersburg State University, 199034 Saint Petersburg, Russia; (S.A.K.); (I.A.R.); (A.S.B.); (A.A.B.); (A.V.K.); (S.S.N.); (I.A.Z.)
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2
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Rana S, Kumar A, Lai CW, Sharma G, Dhiman P. Recent progress in ZnCr and NiCr layered double hydroxides and based photocatalysts for water treatment and clean energy production. CHEMOSPHERE 2024; 356:141800. [PMID: 38554860 DOI: 10.1016/j.chemosphere.2024.141800] [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: 09/11/2023] [Revised: 02/29/2024] [Accepted: 03/24/2024] [Indexed: 04/02/2024]
Abstract
In pursuit of advancing photocatalysts for superior performance in water treatment and clean energy generation, researchers are increasingly focusing on layered double hydroxides (LDHs) which have garnered significant attention due to their customizable properties, morphologies, distinctive 2D layered structure and flexible options for modifying anions and cations. No review has previously delved specifically into ZnCr and NiCr LDH-based photocatalysts and therefore, this review highlights the recent surge in ZnCr and NiCr-based LDHs as potential photocatalysts for their applications in water purification and renewable energy generation. The structural and fundamental characteristics of layered double hydroxides and especially ZnCr-LDHs and NiCr-LDHs are outlined. Further, the various synthesis techniques for the preparation of ZnCr-LDHs, NiCr-LDHs and their composite and heterostructure materials have been briefly discussed. The applicability of ZnCr-LDH and NiCr-LDH based photocatalysts in tackling significant issues in water treatment and sustainable energy generation is the main emphasis of this review. It focuses on photocatalytic degradation of organic pollutants in wastewater, elucidating the principles and advancements for enhancing the efficiency of these materials. It also explores their role in H2 production through water splitting, conversion of CO2 into valuable fuels and NH3 synthesis from N2, shedding light on their potential for clean energy solutions. The insights presented herein offer valuable guidance for researchers working towards sustainable solutions for environmental remediation and renewable energy generation.
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Affiliation(s)
- Sahil Rana
- International Research Centre of Nanotechnology for Himalayan Sustainability (IRCNHS), Shoolini University, India, 173229
| | - Amit Kumar
- International Research Centre of Nanotechnology for Himalayan Sustainability (IRCNHS), Shoolini University, India, 173229.
| | - Chin Wei Lai
- Nanotechnology & Catalysis Research Centre (NANOCAT), Institute for Advanced Studies (IAS), University of Malaya (UM), 50603, Kuala Lumpur, Malaysia
| | - Gaurav Sharma
- International Research Centre of Nanotechnology for Himalayan Sustainability (IRCNHS), Shoolini University, India, 173229
| | - Pooja Dhiman
- International Research Centre of Nanotechnology for Himalayan Sustainability (IRCNHS), Shoolini University, India, 173229
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3
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Yang Z, Chen YW, Jin YF, Jin Z, Xie HS, Cong XS, Teng DG. Ni, Co-Embedded MOF-Derived N-Doped Bimetallic Porous Carbon for Adsorption-Photocatalytic Degradation of Organic Dyes and Antibiotics. ACS OMEGA 2024; 9:11356-11365. [PMID: 38496926 PMCID: PMC10938419 DOI: 10.1021/acsomega.3c07420] [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: 09/26/2023] [Revised: 12/13/2023] [Accepted: 12/14/2023] [Indexed: 03/19/2024]
Abstract
An efficient protocol for photocatalytic degradation of organic dyes and antibiotics has been successfully established via MOF-derived (MOF = metal-organic framework) Ni, Co-embedded N-doped bimetallic porous carbon nanocomposites (NiCo/NC). Such a NiCo/NC nanocomposite features well-distributed structures, suitable specific surface areas, and more active sites determined by various characterization analyses. The catalyst exhibits higher photocatalytic performance and stability toward the liquid-phase degradation of methylene blue (MB) under visible light irradiation for 60 min, after the adsorption-desorption equilibrium and the thorough degradation into H2O and CO2. Radical quenching experiments further confirmed the dominant effect of electron holes h+ and superoxide radical anions ·O2- for the MB photodegradation process. NiCo/NC was also appropriate for the degradation of Rhodamine B, methyl orange, tetracycline hydrochloride, and norfloxacin. Moreover, NiCo/NC is robust, and its photocatalytic activity is basically maintained after 8 cycles. This work is expected to provide additional information for the design of MOF-derived carbon material with more excellent properties and lay the foundation for further industrial applications.
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Affiliation(s)
- Zheng Yang
- School
of Architectural Intelligence, Jiangsu Vocational
Institute of Architectural Technology, Xuzhou 221116, P. R. China
- Jiangsu
Collaborative Innovation Center for Building Energy Saving and Construct
Technology, Xuzhou 221116, P. R. China
- Jiangsu
Engineering Laboratory of Biomass Resources Comprehensive Utilization, Jiangsu Vocational Institute of Architectural Technology, Xuzhou 221116, P. R. China
- College
of Chemical Engineering, Zaozhuang University, Zaozhuang 277160, P. R. China
| | - Yi-Wu Chen
- School
of Architectural Intelligence, Jiangsu Vocational
Institute of Architectural Technology, Xuzhou 221116, P. R. China
| | - Yu-Fei Jin
- School
of Architectural Intelligence, Jiangsu Vocational
Institute of Architectural Technology, Xuzhou 221116, P. R. China
| | - Zheng Jin
- School
of Architectural Intelligence, Jiangsu Vocational
Institute of Architectural Technology, Xuzhou 221116, P. R. China
| | - Heng-Shen Xie
- Jiangsu
Engineering Laboratory of Biomass Resources Comprehensive Utilization, Jiangsu Vocational Institute of Architectural Technology, Xuzhou 221116, P. R. China
| | - Xing-Shun Cong
- College
of Chemical Engineering, Zaozhuang University, Zaozhuang 277160, P. R. China
| | - Dao-Guang Teng
- School
of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, P. R. China
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4
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Guo C, Li P. The photocatalytic degradation of tylosin by a trimetallic ZnCrNi/GO-layered double hydroxide in the conformation of a clustered crumb sheet. ENVIRONMENTAL MONITORING AND ASSESSMENT 2023; 195:1423. [PMID: 37934331 DOI: 10.1007/s10661-023-12048-1] [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: 06/12/2023] [Accepted: 10/27/2023] [Indexed: 11/08/2023]
Abstract
Industrial wastewater from drug production is one of the contributors to water pollution. For drug wastewater treatment, photodegradation-based chemical technology has gained more attention because of the drug's microbicidal nature and stability. A zinc-chromium-nickel trimetallic-layered double hydroxide compounding with graphene oxide catalyst (ZnCrNi/GO) was synthesized and exhibited a clustered crumb sheet morphology. The prepared catalyst was characterized by a scanning electron microscope (SEM) equipped with an energy-dispersive X-ray spectrometer (EDS), Fourier transform infrared (FTIR) spectra, and X-ray photoelectron spectroscopy (XPS). The results of material analysis established the crystallographic structures of catalysts and evidenced the successful synthesis. The ZnCrNi/GO nanohybrid revealed a higher activity of approximately 90% degradation of tolysin under high-pressure mercury lamp irradiation. The optimized condition of the catalyst dosage of 500 mg/L and the natural pH of the solution at 7.0 under the tylosin concentration of 10 mg/L with high photocatalytic efficiency was explored. In addition, the main reactive species involved in this photocatalysis degradation were explored as the active cavity h+ and ·O2- to a certain extent by the radical trapping experiments. Reuse experiments have shown that as-prepared catalysts possessed the properties of high efficiency and long-lasting catalytic performance, which could meet pharmaceutical wastewater treatment. A three-metal-layered double hydroxide composed by the metal of Ni, Zn, and Cr was synthesized and attached onto graphene oxide. The catalytic materials obtained in this way have a significant catalysis efficiency to tylosin with the likely degradation mechanism of the active cavity h+ and the oxidative capacity of hydroxyl radials.
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Affiliation(s)
- Chenchen Guo
- School of Environment and Life Health, Anhui Vocational and Technical College, 2600 Wenzhong Road, Hefei City, Anhui Province, 230011, People's Republic of China
| | - Ping Li
- School of Materials & Chemical Engineering, Anhui Jianzhu University, 292 Ziyun Road, Hefei City, Anhui Province, 230601, People's Republic of China.
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5
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Liu X, Zhou Y, Sun S, Bao S. Study on the behavior and mechanism of NiFe-LDHs used for the degradation of tetracycline in the photo-Fenton process. RSC Adv 2023; 13:31528-31540. [PMID: 37908668 PMCID: PMC10614753 DOI: 10.1039/d3ra05475f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2023] [Accepted: 10/14/2023] [Indexed: 11/02/2023] Open
Abstract
An environment-friendly 3D NiFe-LDHs photocatalyst was fabricated via a simple hydrothermal method and characterized by means of SEM, XRD, BET, XPS and FT-IR. It is a highly efficient heterogeneous photo-Fenton catalyst for the degradation of TC-HCl under visible light irradiation. After exploring the effects of catalyst dosage, initial concentration of TC-HCl, solution pH and H2O2 concentrations, the optimal reaction conditions were determined. The experiment results showed that the degradation efficiency can reach 99.11% through adding H2O2 to constitute a photo-Fenton system after adsorption for 30 min and visible light for 60 min. After four cycles, the degradation rate decay is controlled within 21.2%, indicating that NiFe-LDHs have excellent reusable performance. The experimental results of environmental factors indicate that Fe2+ and Ca2+ promoted the degradation of TC-HCl, both Cl- and CO32- inhibited the degradation of TC-HCl. Two other antibiotics (OTC and FT) were selected for research and found to be effectively removed in this system, achieving effective degradation of a variety of typical new pollutants. The radical trapping tests and ESR detection showed that ·OH and ·O2- were the main active substances for TC degradation in the photo-Fenton system. By further measuring the intermediate products of photodegradation, the degradation pathway of TC-HCl was inferred. The toxicity analysis demonstrated that the overall toxicity of the identified intermediates was reduced in this system. This study provides a theoretical and practical basis for the removal of TC in aquatic environments.
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Affiliation(s)
- Xia Liu
- Changchun Univ. Sci. & Technol., Sch Chem. & Environm. Engn. Changchun 130022 P. R. China
| | - Yuting Zhou
- Changchun Univ. Sci. & Technol., Sch Chem. & Environm. Engn. Changchun 130022 P. R. China
| | - Shuanghui Sun
- Changchun Univ. Sci. & Technol., Sch Chem. & Environm. Engn. Changchun 130022 P. R. China
| | - Siqi Bao
- Changchun Univ. Sci. & Technol., Sch Chem. & Environm. Engn. Changchun 130022 P. R. China
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6
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Wu W, Gao X, Chen B, Meng G, Lian J, Xue F, Kong Q, Yang J. Selective adsorption of tetracycline and copper(II) on ion-imprinted porous alginate microspheres: performance and potential mechanisms. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:105538-105555. [PMID: 37715034 DOI: 10.1007/s11356-023-29810-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2023] [Accepted: 09/06/2023] [Indexed: 09/17/2023]
Abstract
A novel epichlorohydrin and thiourea grafted porous alginate adsorbent (UA-Ca/IIP) was synthesized using ion-imprinting and direct templating to remove copper ions (Cu(II)) and tetracycline (TC) in aqueous solution. UA-Ca/IIP demonstrated great selectivity for Cu(II) and TC among different coexisting anions (CO32-, PO43- and SO42-), cations (Ca2+, Mg2+ and NH4+), and antibiotics (oxytetracycline and sulfamethoxazole). The adsorption of TC and Cu(II) by UA-Ca/IIP was significantly affected by the pH of the solution, and the quantity of TC and Cu(II) adsorbed reached a maximum at pH 5. A pseudo-second-order model better fitted the kinetic data; the Langmuir model predicted the maximum adsorption quantities 3.527 mmol TC g-1 and 4.478 mmol Cu(II) g-1 at 298 K. Thermodynamic studies indicated that the TC and Cu(II) adsorption was more rapid at a higher temperature. Antagonistic and synergistic adsorption experiments showed that the adsorption capacity of TC would increase significantly with the increase of Cu(II) concentration. Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy indicated that along with the influence of pH, electrostatic interaction and complexation were the main mechanisms of TC and Cu(II) adsorption. Regeneration experiments revealed that TC and Cu(II) were removed efficiently and that UA-Ca/IIP was recyclable over the long term. These results show that the modified porous alginate microsphere is a green and recyclable adsorbent, which has good selectivity and high adsorption performance for the removal of TC and Cu(II).
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Affiliation(s)
- Wenkai Wu
- Engineering Research Center of Biofilm Water Purification and Utilization Technology of Ministry of Education, Anhui University of Technology, Ma'anshan, 243032, China
- School of Energy and Environment, Anhui University of Technology, Anhui, Maanshan, 243032, China
| | - Xiangpeng Gao
- School of Metallurgical Engineering, Anhui University of Technology, Anhui, Maanshan, 243032, China
| | - Bo Chen
- Engineering Research Center of Biofilm Water Purification and Utilization Technology of Ministry of Education, Anhui University of Technology, Ma'anshan, 243032, China
- School of Energy and Environment, Anhui University of Technology, Anhui, Maanshan, 243032, China
| | - Guanhua Meng
- Engineering Research Center of Biofilm Water Purification and Utilization Technology of Ministry of Education, Anhui University of Technology, Ma'anshan, 243032, China
- School of Energy and Environment, Anhui University of Technology, Anhui, Maanshan, 243032, China
| | - Jianjun Lian
- Engineering Research Center of Biofilm Water Purification and Utilization Technology of Ministry of Education, Anhui University of Technology, Ma'anshan, 243032, China.
- School of Energy and Environment, Anhui University of Technology, Anhui, Maanshan, 243032, China.
| | - Feng Xue
- Ministry of Ecology and Environment, Nanjing Institute of Environmental Sciences, Jiangsu, Nanjing, 210042, China
| | - Qiaoping Kong
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Shandong, Qingdao, 266033, China
| | - Jianhua Yang
- Engineering Research Center of Biofilm Water Purification and Utilization Technology of Ministry of Education, Anhui University of Technology, Ma'anshan, 243032, China
- School of Energy and Environment, Anhui University of Technology, Anhui, Maanshan, 243032, China
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7
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Liu G, Zhang X, Liu H, He Z, Show PL, Vasseghian Y, Wang C. Biochar/layered double hydroxides composites as catalysts for treatment of organic wastewater by advanced oxidation processes: A review. ENVIRONMENTAL RESEARCH 2023; 234:116534. [PMID: 37399983 DOI: 10.1016/j.envres.2023.116534] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Revised: 06/17/2023] [Accepted: 06/30/2023] [Indexed: 07/05/2023]
Abstract
Heterogeneous advanced oxidation process has been widely studied as an effective method for removing organic pollutants in wastewater, but the development of efficient catalysts is still challenging. This review summaries the present status of researches on biochar/layered double hydroxides composites (BLDHCs) as catalysts for treatment of organic wastewater. The synthesis methods of layered double hydroxides, the characterizations of BLDHCs, the impacts of process factors influencing catalytic performance, and research advances in various advanced oxidation processes are discussed in this work. The integration of layered double hydroxides and biochar provides synthetic effects for improving pollutant removal. The enhanced pollutant degradation in heterogeneous Fenton, sulfate radical-based, sono-assisted, and photo-assisted processes using BLDHCs have been verified. Pollutant degradation in heterogeneous advanced oxidation processes using BLDHCs is influenced by process factors such as catalyst dosage, oxidant addition, solution pH, reaction time, temperature, and co-existing substances. BLDHCs are promising catalysts due to the unique features including easy preparation, distinct structure, adjustable metal ions, and high stability. Currently, catalytic degradation of organic pollutants using BLDHCs is still in its infancy. More researches should be conducted on the controllable synthesis of BLDHCs, the in-depth understanding of catalytic mechanism, the improvement of catalytic performance, and large-scale application of treating real wastewater.
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Affiliation(s)
- Gonggang Liu
- Hunan Province Key Laboratory of Materials Surface & Interface Science and Technology, College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China
| | - Xiuxiu Zhang
- School of Chemical Engineering, Zhengzhou University, Zhengzhou, 450001, China
| | - Hongwen Liu
- School of Chemical Engineering, Zhengzhou University, Zhengzhou, 450001, China
| | - Zhangxing He
- College of Chemical Engineering, North China University of Science and Technology, Tangshan, 063210, China
| | - Pau Loke Show
- Department of Chemical Engineering, Khalifa University, P.O. Box 127788, Abu Dhabi, United Arab Emirates
| | - Yasser Vasseghian
- Department of Chemistry, Soongsil University, Seoul, 06978, South Korea; School of Engineering, Lebanese American University, Byblos, Lebanon; University Centre for Research & Development, Department of Mechanical Engineering, Chandigarh University, Gharuan, Mohali, Punjab, 140413, India; Department of Sustainable Engineering, Saveetha School of Engineering, SIMATS, Chennai, 602105, India.
| | - Chongqing Wang
- School of Chemical Engineering, Zhengzhou University, Zhengzhou, 450001, China.
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8
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Romero-Ortiz G, Samaniego-Benitez E, Tzompantzi F, Mantilla A, Garibay-Febles V, Calderon HA. Electron Microscopy of 2D/3D ZnAl/ZnSn(OH) Hydrotalcite/Zinc Tin Composite Nanophotocatalyst. MICROSCOPY AND MICROANALYSIS : THE OFFICIAL JOURNAL OF MICROSCOPY SOCIETY OF AMERICA, MICROBEAM ANALYSIS SOCIETY, MICROSCOPICAL SOCIETY OF CANADA 2023; 29:1975-1977. [PMID: 37612922 DOI: 10.1093/micmic/ozad067.1023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/25/2023]
Affiliation(s)
| | | | - F Tzompantzi
- Instituto Politecnico Nacional, CICATA Legaria, CDMX, Mexico
| | - A Mantilla
- Instituto Politecnico Nacional, CICATA Legaria, CDMX, Mexico
| | | | - Hector A Calderon
- Instituto Politecnico Nacional, ESFM, Depto. Física, Mexico CDMX, Mexico
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9
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Anand P, Verma A, Hong YA, Hu A, Jaihindh DP, Wong MS, Fu YP. Morphological and elemental tuning of BiOCl/BiVO 4 heterostructure for uric acid electrochemical sensor and antibiotic photocatalytic degradation. CHEMOSPHERE 2023; 310:136847. [PMID: 36241103 DOI: 10.1016/j.chemosphere.2022.136847] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Revised: 09/27/2022] [Accepted: 10/08/2022] [Indexed: 06/16/2023]
Abstract
Deep eutectic solvents (DES) consisting of EG-(ChCl: C2H6O2) and TU-(ChCl: CH4N2S) assisted synthesized BiOCl/BiVO4 heterostructured catalyst studied for electrochemical uric acid (UA) sensor and tetracycline photocatalytic degradation. The chemical composition of the BiOCl/BiVO4 catalyst was analyzed by X-ray photoelectron spectroscopy (XPS). UV-vis spectroscopy reveals increased absorption of visible light till the near-infrared region, which results in a narrowing of band gap energy from 2.3 eV to 2.2 eV for BiOCl/BiVO4-TU. Morphology of catalyst analyzed using field-emission scanning electron microscope (FE-SEM) and Transmission electron microscope (TEM) technique. Time-Resolved photoluminescence (TRPL) confirms an increased lifetime of e-/h+ pair after heterostructure formation. The catalyst-modified glassy carbon electrode shows selectivity toward the detection of uric acid (UA). The limit of detection (LOD) is estimated to be 0.04688 μM for UA; also, interference and stability of catalyst were studied. Photocatalytic activity of the synthesized catalyst was investigated by degrading tetracycline (TC) antibiotic pollutants, and their intermediate product was analyzed by ion trap mass spectrometry (MS).
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Affiliation(s)
- Pandiyarajan Anand
- Department of Materials Science and Engineering, National Dong Hwa University, Shou-Feng, Hualien, 97401, Taiwan
| | - Atul Verma
- Department of Materials Science and Engineering, National Dong Hwa University, Shou-Feng, Hualien, 97401, Taiwan
| | - Yi-An Hong
- Institute of Medical Sciences, Tzu-Chi University, Hualien, 97002, Taiwan
| | - Anren Hu
- Institute of Medical Sciences, Tzu-Chi University, Hualien, 97002, Taiwan; Department of Laboratory Medicine and Biotechnology, Tzu-Chi University, Hualien, 97004, Taiwan
| | | | - Ming-Show Wong
- Department of Materials Science and Engineering, National Dong Hwa University, Shou-Feng, Hualien, 97401, Taiwan.
| | - Yen-Pei Fu
- Department of Materials Science and Engineering, National Dong Hwa University, Shou-Feng, Hualien, 97401, Taiwan.
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10
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Sadeghi Rad T, Yazici ES, Khataee A, Gengec E, Kobya M. Nanoarchitecture of graphene nanosheets decorated with NiCr layered double hydroxide for sonophotocatalytic degradation of refractory antibiotics. ENVIRONMENTAL RESEARCH 2022; 214:113788. [PMID: 35793723 DOI: 10.1016/j.envres.2022.113788] [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: 03/17/2022] [Revised: 05/27/2022] [Accepted: 06/27/2022] [Indexed: 05/12/2023]
Abstract
Highly efficient and durable catalysts for wastewater treatment are urgently required to tackle critical environmental issues. In this regard, NiCr LDH (NC), NiCr LDH-GO (NC-GO), and NiCr LDH-rGO (NC-rGO) nanocomposites were synthesized. The results of XRD, EDX, and FTIR analyses not only explored the crystallographic and chemical structures of catalysts but also confirmed the successful synthesis. Further morphological, physical, chemical, and optical characteristics of the catalysts were evaluated more by SEM, HRTEM, BET, DRS, and XPS techniques. The as-synthesized catalysts were used for the efficient mineralization of rifadin under 50 W LED visible light irradiation and the ultrasonic power of 150 W. Amongst, 0.75 g L-1 of NC-rGO demonstrated high sonophotocatalytic efficiency (88%) in natural pH (pH = 8) of 15 mg L-1 of rifadin. The introduced system is also powerful for the decontamination of pharmaceutical-containing wastewater as well as other refractory antibiotics. Moreover, the radical trapping experiments demonstrated that the main reactive species involved in the degradation of rifadin are •OH, h+, and O2•-. The possible intermediates were thoroughly investigated using GCMS analysis. Also, NC-rGO demonstrated superior antibacterial activity in comparison with NC, NC-GO samples.
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Affiliation(s)
- Tannaz Sadeghi Rad
- Department of Environmental Engineering, Gebze Technical University, 41400, Gebze, Turkey
| | - Emine Sevval Yazici
- Department of Environmental Engineering, Gebze Technical University, 41400, Gebze, Turkey
| | - Alireza Khataee
- Department of Environmental Engineering, Gebze Technical University, 41400, Gebze, Turkey; Research Laboratory of Advanced Water and Wastewater Treatment Processes, Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, 51666-16471 Tabriz, Iran.
| | - Erhan Gengec
- Department of Environmental Protection, University of Kocaeli, 41275, Izmit, Kocaeli, Turkey
| | - Mehmet Kobya
- Department of Environmental Engineering, Gebze Technical University, 41400, Gebze, Turkey; Department of Environmental Engineering, Kyrgyz-Turkish Manas University, 720038, Bishkek, Kyrgyzstan
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11
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Hou N, Li X, Jiang X, Zhang N, Wang R, Li D. The role of biochar in the photocatalytic treatment of a mixture of Cr(VI) and phenol pollutants: Biochar as a carrier for transferring and storing electrons. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 844:157145. [PMID: 35798118 DOI: 10.1016/j.scitotenv.2022.157145] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2022] [Revised: 06/05/2022] [Accepted: 06/30/2022] [Indexed: 06/15/2023]
Abstract
Biochar (BC) is widely used to remove environmental pollutants due to its photocatalytic activity. However, the mechanism of BC in photocatalysis remains unclear. In this study, soybean straw biochar (D500), dewatered sludge biochar (S500) and TiO2/BC composite catalysts were prepared to test their photocatalytic activity in the photocatalysis-dark reaction using phenol and Cr(VI) as the representative pollutants. D500 had a good graphitized structure, layered structure and more active sites, which led to good photocatalytic activity. Compared with D500, S500 did not have a similar structure, resulting in a lack of photocatalytic activity. In addition, the efficiency of Cr(VI) and phenol removal using D500/TiO2 as a catalyst was higher than that obtained using D500 and TiO2, respectively. TiO2 coupled with D500 increased the generation of photoexcited electrons and reduced the recombination of e--h+ pairs. The removal efficiency of TiO2/D500 for Cr(VI) (80.4 %) and phenol (77.7 %) in the hybrid systems was higher than that of Cr(VI) and phenol in unitary systems. This difference was mainly attributed to the inhibition of e--h+ pair recombination by phenol and Cr(VI), which function as electron quenchers and hole quenchers, respectively. Furthermore, D500 stored electrons under light and released these electrons under dark conditions. When D500 was combined with TiO2, the electrons on the biochar activated the catalytic redox activity of TiO2, thereby removing pollutants under dark conditions. Meanwhile, TiO2/D500 also exhibited good reusability and stability. In summary, this study provides new insight into the role of biochar in photocatalysis.
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Affiliation(s)
- Ning Hou
- College of Resources and Environment, Northeast Agricultural University, Harbin 150030, Heilongjiang, PR China
| | - Xianyue Li
- College of Resources and Environment, Northeast Agricultural University, Harbin 150030, Heilongjiang, PR China
| | - Xinxin Jiang
- College of Resources and Environment, Northeast Agricultural University, Harbin 150030, Heilongjiang, PR China
| | - Nannan Zhang
- College of Resources and Environment, Northeast Agricultural University, Harbin 150030, Heilongjiang, PR China
| | - Rongchen Wang
- College of Resources and Environment, Northeast Agricultural University, Harbin 150030, Heilongjiang, PR China
| | - Dapeng Li
- College of Resources and Environment, Northeast Agricultural University, Harbin 150030, Heilongjiang, PR China.
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Constructing a novel mesoporous CsxWO3/C composite aerogel for efficient adsorption/photocatalytic degradation of Oxytetracycline. J SOLID STATE CHEM 2022. [DOI: 10.1016/j.jssc.2022.123411] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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