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Saqib S, Muneer A, Munir R, Sayed M, Waqas M, Aliyam T, Younas F, Farah MA, Elsadek MF, Noreen S. Green hybrid coagulants for water treatment: An innovative approach using alum and bentonite clay combined with eco-friendly plant materials for batch and column adsorption. ENVIRONMENTAL RESEARCH 2024; 259:119569. [PMID: 38972343 DOI: 10.1016/j.envres.2024.119569] [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: 12/01/2023] [Revised: 06/26/2024] [Accepted: 07/04/2024] [Indexed: 07/09/2024]
Abstract
Textile industries contribute to water pollution through synthetic dye discharge. This study explores the use of natural bio-coagulants to remove acid dyes from wastewater, investigating factors like pH, coagulant dose, dye concentration, contact time, and temperature for optimal results. The optimum pH and coagulants capabilities of (CAAPP, CAAPH, CBAGL, CBAPP and CBAPH) were 3 (49.6 mg/g), 3 (42.5 mg/g), 3 (38.9 mg/g), 4 (35.7 mg/g), 4 (34.1 mg/g), and 4 (29.4 mg/g) respectively, while treating of selected BRF-221 dyes from water solution. The acidic range (3-4) was found to have the best pH for the maximal coagulation, and the optimal dose were found to be 0.05 g/50 mL. The equilibrium was attained within 45-60 min for all coagulants. After 60 min of shaking, the maximum coagulation capacities (21.9, 21.02, 16.5, 27.9, 25.3, and 23.4 mg/g) of several coagulant composites (CAAGL, CAAPP, CAAPH, CBAGL, CBAPP, CBAPH) were determined. The initial BRF-221 dye concentration in the range of 10-200 mg/L was considered as optimum for gaiting maximum elimination of dye using different coagulants. At a dye value of 100 mg/L of BRF-221, maximal coagulation capacities CAAGL (179.19 mg/g), CAAPP (166.06 mg/g), CAAPH (141.60 mg/g), and CBAGL (126.49 mg/g), CBAPP (113.9 mg/g), CBAPH (93.08 mg/g) were attained. The study found 35 °C to be the optimal temperature for maximum acid dye removal using bio-coagulants. Increasing temperature reduced coagulation capacity, indicating an exothermic process. Freundlich and Langmuir isotherms showed suitability for pseudo-first-order and pseudo-second-order kinetics in biosorption. Thermodynamic parameters were assessed for process feasibility. Effective coagulants demonstrated sensitivity to electrolyte variations. In column studies, adjusting parameters achieved maximum coagulation efficiency for removing BRF-221 dyes. The study successfully applied optimal parameters to remove real textile effluents at a practical scale. SEM, FT-IR, BET and XRD characterized coagulants, providing insights into stability and morphology.
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Affiliation(s)
- Sidra Saqib
- Department of Chemistry, University of Agriculture, Faisalabad, 38000, Pakistan
| | - Amna Muneer
- Department of Physics, Government College Women University, Faisalabad, 38000, Pakistan
| | - Ruba Munir
- Department of Chemistry, University of Agriculture, Faisalabad, 38000, Pakistan
| | - Murtaza Sayed
- National Center of Excellence in Physical Chemistry, University of Peshawar, Pakistan
| | - Muhammad Waqas
- Department of Chemistry, University of Agriculture, Faisalabad, 38000, Pakistan
| | - Tayyiba Aliyam
- Department of Chemistry, University of Agriculture, Faisalabad, 38000, Pakistan
| | - Fazila Younas
- School of Environmental Science and Engineering, Shandong University, Qingdao, 266237, China
| | - Mohammad Abul Farah
- Department of Zoology, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Mohamed Farouk Elsadek
- Department of Biochemistry, College of Science, King Saud University, P.O. 2455, Riyadh, 11451, Saudi Arabia
| | - Saima Noreen
- Department of Chemistry, University of Agriculture, Faisalabad, 38000, Pakistan.
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Malik AQ, Jabeen T, Lokhande PE, Kumar D, Awasthi S, Pandey SK, Mubarak NM, Abnisa F. Molecularly imprinted Ag 2S quantum dots with high photocatalytic activity for dye removal: Experimental and DFT insights. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 366:121889. [PMID: 39053374 DOI: 10.1016/j.jenvman.2024.121889] [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: 01/09/2024] [Revised: 07/09/2024] [Accepted: 07/13/2024] [Indexed: 07/27/2024]
Abstract
Molecular imprinted polymers (MIPs) were developed by carrying out the cocktail solution of Template ((Salata, 2004)-Gingerol), monomer, crosslinker, and Ag2S Quantum Dots (QDs) by ex-situ dissolved in an appropriate solvent, resulting in an efficient crosslinked polymer composite. Degradation of Alizarin red S (ARS) dye and yellowish sunset (SY) azo dye under visible light irradiation was reported first time by the introduction of prepared MIPs composite. In this research, the result shows efficient photocatalyt activity of Ag2S-MIPs composite for the degradation of AR and SY dye with degradation% (80%) and (84%) in the aqueous wastewater. The degradation efficiency of the Ag2S-MIPs composite and the Ag2S QD associated with non-imprinted polymers (NIPs) (i.e.Ag2S-NIPs composite) were calculated by using different parameters such as catalyst dose, pH value, optimum time and concentration variation and the observations are evocative. Moreover, the density functional theory (DFT) approach was also used to analyze the structural, stability/energetics, and electronic features of the organic-inorganic hybrid composites of the Ag2S QD with the MIPs based on (Salata, 2004)-gingerol extract. The proposed QD and MIPs (EGDMA and (Salata, 2004)-Gingerol) composite model has been detected to be the most stable because it shows the largest binding energy (BE) among the three chosen composite models. It was found out that imprinted polymers were superior in enhancing the degradation of dyes when compared to non imprinted polymers. Introducing MIPs into the valence band accelerates the catalysis properties to stabilize newly fashioned excitons that are basically generated as a result of light excitation in presence of Ag2S Quantum Dots (QDs) and molecular imprinted polymer (MIPs). Motivation behind this work is to address the challenges related to environmental pollution causing by organic dyes. These toxins are known to cause diverse symptoms (e.g., skin irritation, eye infection, respiratory disorders, and even cancer) once exposed through ingestion and inhalation. Through incorporation of Ag2S QD into MIP,the purpose of this research is to enhance the selectivity, specificity and photocatalytic activity for dyes and that work holds a potential towards environmental remediation by developing a cost effective and sustainable method for controlling pollution in water.
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Affiliation(s)
- Azad Qayoom Malik
- Department of Chemistry, School of Chemical Engineering and Physical Sciences, Lovely Professional University, Phagwara, Punjab, 144411, India
| | - Tabinda Jabeen
- Department of Structural Chemistry and Spectroscopy, Universitat Leipzig, 04103, Leipzig, Germany
| | - Prasad Eknath Lokhande
- Advanced Physics Laboratory, Department of Physics, Savitribai Phule Pune University, Pune, India
| | - Deepak Kumar
- Department of Chemistry, School of Chemical Engineering and Physical Sciences, Lovely Professional University, Phagwara, Punjab, 144411, India.
| | - Shikha Awasthi
- Department of Chemistry, School of Basic Sciences, Manipal University Jaipur, Jaipur, 303007, Rajasthan, India.
| | - Sarvesh Kumar Pandey
- Department of Chemistry, Maulana Azad National Institute of Technology Bhopal, Bhopal, 462003, Madhya Pradesh, India.
| | - Nabisab Mujawar Mubarak
- Petroleum and Chemical Engineering, Faculty of Engineering, Universiti Teknologi Brunei, Bandar Seri Begawan, BE1410, Brunei Darussalam; Department of Biosciences, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences, Chennai, India.
| | - Faisal Abnisa
- Department of Chemical and Materials Engineering, Faculty of Engineering, King Abdulaziz University, Rabigh, 21911, Saudi Arabia
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Truong HB, Doan TTL, Hoang NT, Van Tam N, Nguyen MK, Trung LG, Gwag JS, Tran NT. Tungsten-based nanocatalysts with different structures for visible light responsive photocatalytic degradation of bisphenol A. J Environ Sci (China) 2024; 139:569-588. [PMID: 38105077 DOI: 10.1016/j.jes.2023.09.028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Revised: 09/18/2023] [Accepted: 09/20/2023] [Indexed: 12/19/2023]
Abstract
Environmental pollution, such as water contamination, is a critical issue that must be absolutely addressed. Here, three different morphologies of tungsten-based photocatalysts (WO3 nanorods, WO3/WS2 nanobricks, WO3/WS2 nanorods) are made using a simple hydrothermal method by changing the solvents (H2O, DMF, aqueous HCl solution). The as-prepared nanocatalysts have excellent thermal stability, large porosity, and high hydrophilicity. The results show all materials have good photocatalytic activity in aqueous media, with WO3/WS2 nanorods (NRs) having the best activity in the photodegradation of bisphenol A (BPA) under visible-light irradiation. This may originate from increased migration of charge carriers and effective prevention of electron‒hole recombination in WO3/WS2 NRs, whereby this photocatalyst is able to generate more reactive •OH and •O2- species, leading to greater photocatalytic activity. About 99.6% of BPA is photodegraded within 60 min when using 1.5 g/L WO3/WS2 NRs and 5.0 mg/L BPA at pH 7.0. Additionally, the optimal conditions (pH, catalyst dosage, initial BPA concentration) for WO3/WS2 NRs are also elaborately investigated. These rod-like heterostructures are expressed as potential catalysts with excellent photostability, efficient reusability, and highly active effectivity in different types of water. In particular, the removal efficiency of BPA by WO3/WS2 NRs reduces by only 1.5% after five recycling runs and even reaches 89.1% in contaminated lake water. This study provides promising insights for the nearly complete removal of BPA from wastewater or different water resources, which is advantageous to various applications in environmental remediation.
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Affiliation(s)
- Hai Bang Truong
- Optical Materials Research Group, Science and Technology Advanced Institute, Van Lang University, Ho Chi Minh City, Viet Nam, E-mail: (Hai Bang Truong); Faculty of Applied Technology, School of Technology, Van Lang University, Ho Chi Minh City, Viet Nam
| | - Thi Thu Loan Doan
- The University of Da Nang, University of Science and Technology, 54 Nguyen Luong Bang, Da Nang, Viet Nam
| | - Nguyen Tien Hoang
- The University of Da Nang, University of Science and Education, 459 Ton Duc Thang St., Lien Chieu, Da Nang 550000, Viet Nam
| | - Nguyen Van Tam
- Institute of Veterinary Science and Technology, 31ha zone, Trau Quy, Gia Lam, Ha Noi 12400, Viet Nam
| | - Minh Kim Nguyen
- Institute of Veterinary Science and Technology, 31ha zone, Trau Quy, Gia Lam, Ha Noi 12400, Viet Nam.
| | - Le Gia Trung
- Department of Physics, Yeungnam University, Gyeongsan, Gyeongbuk 38541, Republic of Korea.
| | - Jin Seog Gwag
- Department of Physics, Yeungnam University, Gyeongsan, Gyeongbuk 38541, Republic of Korea.
| | - Nguyen Tien Tran
- Center for Advanced Chemistry, Institute of Research and Development, Duy Tan University, 03 Quang Trung, Da Nang 550000, Viet Nam; Faculty of Natural Sciences, Duy Tan University, 03 Quang Trung, Da Nang 550000, Viet Nam.
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Yan F, Hu L, Wang M, Huang S, Zhang S, He L, Zhang Z. Multifunctional photocatalyst of graphitic carbon embedded with Fe 2O 3/Fe 3O 4 nanocrystals derived from lichen for efficient photodegradation of tetracycline and methyl blue. ENVIRONMENTAL TECHNOLOGY 2024; 45:2045-2066. [PMID: 36609215 DOI: 10.1080/09593330.2022.2164522] [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: 08/08/2022] [Accepted: 12/24/2022] [Indexed: 06/17/2023]
Abstract
We propose a feasible and economical method of constructing biomass-based multifunctional photocatalysts with excellent adsorption performance and high photodegradation abilities toward tetracycline (TC) and methyl blue (MB) under visible light. A series of novel hybrids of porous graphitic carbon embedded with Fe2O3/Fe3O4 nanocrystals (denoted as Fe2O3/Fe3O4@C) were derived from lichen doped with different dosages of Fe3+ by calcination at 700°C under a N2 atmosphere. The Fe2O3/Fe3O4@C hybrids exhibited nanoflake-like shapes, mesoporous structures, and efficient visible light harvesting, thus indicating enhanced adsorption ability and photoactivity toward pollutants. The formed Fe2O3/Fe3O4 heterojunction improved the separation efficiency and inhibited the recombination of photogenerated carriers, whereas the carbon network improved the transfer of photogenerated electrons. Under optimised conditions, the Fe2O3/Fe3O4@C-1 hybrid demonstrated enhanced photodegradation efficiencies of 96.4% for TC and 100% for MB under visible light. In addition, electron spin resonance and trapping measurements were performed to identify active species and determine the photocatalytic mechanism toward pollutants. •O2- and •OH were the active species involved, playing critical roles in the TC and MB photodegradation processes. In addition, a bacterium test revealed that the products of TC degradation by Fe2O3/Fe3O4@C-1 showed low biological toxicity. This work provides a promising preparation strategy or biomass-based photocatalysts for application in environmental pollutant treatment.
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Affiliation(s)
- Fufeng Yan
- School of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, P. R. People's Republic of China
- Faculty of Education, Beijing Normal University, Beijing, P. R. People's Republic of China
| | - Lijun Hu
- School of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, P. R. People's Republic of China
| | - Minghua Wang
- School of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, P. R. People's Republic of China
| | - Shunjiang Huang
- School of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, P. R. People's Republic of China
| | - Shuai Zhang
- School of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, P. R. People's Republic of China
| | - Linghao He
- School of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, P. R. People's Republic of China
| | - Zhihong Zhang
- School of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, P. R. People's Republic of China
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Saravanan A, Ragini YP, Kumar PS, Thamarai P, Rangasamy G. A critical review on the removal of toxic pollutants from contaminated water using magnetic hybrids. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:105099-105118. [PMID: 37740158 DOI: 10.1007/s11356-023-29811-z] [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: 02/14/2023] [Accepted: 09/06/2023] [Indexed: 09/24/2023]
Abstract
The persistence of organic/inorganic pollutants in the water has become a serious environmental issue. Among the different pollutants, dyes and heavy metal pollution in waterways are viewed as a global ecological problem that can have an impact on humans, plants, and animals. The necessity to develop a sustainable and environmentally acceptable approach to remove these toxic contaminants from the ecosystem has been raised. In the past two decades, rapid industrialization and anthropogenic activities in developed countries have aggravated environmental pollution. Industrial effluents that are discharged directly into the natural environment taint the water, which has a consequence for the water resources. Magnetic nanohybrids are broadly investigated materials used in the adsorption and photocatalytic degradation of poisonous pollutants present across water effluents. In the present review, the toxic health effects of heavy metals and dyes from the water environment have been discussed. This paper reviews the role of magnetic nanohybrids in the removal of pollutants from the water environment, providing an adequate point of view on their new advances regarding their qualities, connection methodologies, execution, and their scale-up difficulties.
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Affiliation(s)
- Anbalagan Saravanan
- Department of Biotechnology, Saveetha School of Engineering, SIMATS, Chennai, 602105, India
| | | | - Ponnusamy Senthil Kumar
- Centre for Pollution Control and Environmental Engineering, Pondicherry University, Chinna Kalapet, Puducherry-605014, India.
| | - Packiyam Thamarai
- Department of Biotechnology, Saveetha School of Engineering, SIMATS, Chennai, 602105, India
| | - Gayathri Rangasamy
- School of Engineering, Lebanese American University, Byblos, Lebanon
- University Centre for Research and Development & Department of Civil Engineering, Chandigarh University, Gharuan, Mohali, Punjab, 140413, India
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Sathya Priya B, Aruchamy K, Oh TH, Avula B, Hasan I, Shanthi M. Synthesis of Solar Light Active Reduced Graphene Oxide-ZnS Nanomaterial for Photocatalytic Degradation and Antibacterial Applications. MICROMACHINES 2023; 14:1324. [PMID: 37512635 PMCID: PMC10386591 DOI: 10.3390/mi14071324] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2023] [Revised: 06/16/2023] [Accepted: 06/24/2023] [Indexed: 07/30/2023]
Abstract
Good water quality is essential for life; therefore, decolorizing and detoxifying organic dye wastes (textile effluents) have gained immense environmental importance in recent years. Thus, the degradation of wastewater has become a potential need for our environment. This research aims to synthesize and investigate a ceramic-based nanomaterial catalyst for the degradation of dye solution under exposure to sunlight. A reduced graphene oxide-ZnS (rGO-ZnS) nanomaterial was qualitatively synthesized using a solvothermal method. The prepared nanomaterial was characterized using XRD, SEM, HR-TEM, EDX, XPS, and FT-IR techniques. The photocatalytic activity of the rGO-ZnS nanomaterial was checked using oxidative photocatalytic degradation of naphthol blue black dye (NBB) under direct sunlight irradiation. Here, the rGO/ZnS composite showed a significant photocatalytic performance to degraded NBB (93.7%) under direct solar light. Chemical Oxygen Demand (COD) measurements confirmed the mineralization of the dye. The influence of different radical scavengers on NBB degradation was studied. Optimum conditions for efficient degradation were determined. The antibacterial property of the prepared catalyst was studied.
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Affiliation(s)
- B Sathya Priya
- Department of Chemistry, Annamalai University, Annamalainagar 608002, Tamil Nadu, India
| | - Kanakaraj Aruchamy
- School of Chemical Engineering, Yeungnam University, Gyeongsan 38436, Republic of Korea
| | - Tae Hwan Oh
- School of Chemical Engineering, Yeungnam University, Gyeongsan 38436, Republic of Korea
| | - Balakrishna Avula
- Department of Chemistry, Rajeev Gandhi Memorial College of Engineering and Technology (Autonomous), Nandyal 518501, Andhra Pradesh, India
| | - Imran Hasan
- Department of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - M Shanthi
- Department of Chemistry, Annamalai University, Annamalainagar 608002, Tamil Nadu, India
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You J, Li J, Wang Z, Devanesan S, Farhat K, Kim W, Sivarasan G, Zhang H. Improving the efficiency of metal ions doped Fe 2O 3 nanoparticles: Photocatalyst for removal of organic dye from aqueous media. CHEMOSPHERE 2023:139229. [PMID: 37354953 DOI: 10.1016/j.chemosphere.2023.139229] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Revised: 05/31/2023] [Accepted: 06/13/2023] [Indexed: 06/26/2023]
Abstract
The metal ion-based nanocomposite photocatalysts were accepted to exhibit a wide range of photocatalytic and biological applications. In this paper, we synthesize bare Fe2O3, 1 wt% metal (Ag, Co, and Cu) doped Fe2O3 nanoparticles (NPs) using a simple hydrothermal process and wet impregnation method. The as-prepared nanomaterials crystalline structure, shape, optical characteristics, and elemental composition were determined by using X-ray powder diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Scanning electron microscope (SEM), Energy-dispersive X-ray (EDS) and Transmission electron microscopy (TEM) techniques. Furthermore, the synthesized nanocomposites were utilized as a photosensitizer for the degradation of reactive red (RR120) and orange II (O-II) dyes under sunlight irradiation. The synthesized 1 wt% Ag-Fe2O3 (AgF) NPs samples exhibit a more exceptional catalytic performance of RR120 and O-II dyes (98.32%) within 120 min than the existing Fe2O3, 1 wt% Co-Fe2O3, and Cu-Fe2O3 NPs. The effect of parameters such as exciton formation under solar irradiation, charge recombination rate, and surface charge availability. The metal oxide-doped nanocomposite economic relevance is revealed by their long-term durability and recyclability in photodegradation reactions. The photocatalytic investigations show that the active species O2∙-, HO∙ and h+ play an important role in the dye degradation process. This research might pave the opportunity for the sustainable development of greater photocatalysts for photodegradation and a wide range of environmental applications.
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Affiliation(s)
- Junhua You
- School of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110870, China
| | - Jingjing Li
- School of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110870, China
| | - Zhiwei Wang
- School of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110870, China
| | - Sandhanasamy Devanesan
- Department of Physics and Astronomy, College of Science, King Saud University, P. O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Karim Farhat
- Department of Urology, College of Medicine, King Saud University, Riyadh, Saudi Arabia
| | - Woong Kim
- Department of Environmental Engineering, Kyungpook National University, Daegu, South Korea
| | - Ganesan Sivarasan
- Department of Environmental Engineering and Management, Chaoyang University of Technology, Taichung, 41349, Taiwan.
| | - Hangzhou Zhang
- Department of Orthopedics; Joint Surgery and Sports Medicine, First Affiliated Hospital of China Medical University, Shenyang 110001, China.
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Facile synthesis of SrWO4@MIL-88A(Fe) heterojunctions and their deep treatment of dye wastewater and municipal landfill leachate using photo-Fenton technology. J IND ENG CHEM 2022. [DOI: 10.1016/j.jiec.2022.12.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Jayapandi S, Soundarrajan P, Kumar SS, Lakshmi D, Albaqami MD, Ouladsmane M, Mani G. Efficient Z-scheme LaCoO3/In2O3 heterostructure photocatalyst for fast dye degradation under visible light irradiation. RESEARCH ON CHEMICAL INTERMEDIATES 2022. [DOI: 10.1007/s11164-022-04832-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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Liu W, Liu D, Liu M. Effects of process parameters on preparation of Ti@SiO2 particles during fluidized bed chemical vapor deposition via design of experiments. Chem Eng Res Des 2022. [DOI: 10.1016/j.cherd.2022.09.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Yang H, Cao P, Zhang Y, Zhou M, Wang Q, Wang R, Song P, He Y. Construction of WO 3 nanocubes@Loess for rapid photocatalytic degradation of organics in wastewater under sunlight. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:82297-82308. [PMID: 35752672 DOI: 10.1007/s11356-022-21633-9] [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: 03/29/2022] [Accepted: 06/19/2022] [Indexed: 06/15/2023]
Abstract
In nowadays, environmental pollution has been greatly improved, but the development of low-cost and environmentally friendly materials are still challenge in the field of water treatment. Herein, a cheap and eco-friendly natural loess particle (LoP) was used for in situ growth of tungsten trioxide nanocubes (WO3NCs) on its surface via a simple one-pot hydrothermal method, which afforded a stable loess-based photocatalyst (WO3NCs@LoP). It was characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR) analysis, UV-Vis diffuse reflectance spectra (UV-Vis DRS), and X-ray photoelectron spectroscopy (XPS). The photocatalytic performances of WO3NCs@LoP were applied to photodegradation of organics under visible-light illumination. It was found that the removal rate of methylene blue (MB) got to 99% within 20 min, which was higher than that of materials, such as pure LoP and WO3NCs. Moreover, the photocatalytic activity of WO3NCs@LoP remained 85% after 9 cycling times, indicating its high stability and reusability. It was suggested that the synergy of the well narrowed band gap and effectual control of e--h+ recombination in WO3NCs@LoP improve its photodegradation efficiency. In summary, using natural minerals (LoP) as carrier, a novel eco-friendly photocatalyst could be explored for photodegradation of organic pollutions in wastewater treatment.
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Affiliation(s)
- Hua Yang
- Key Lab. Eco-Functional Polymer Materials of MOE, Institute of Polymer, College of Chemistry & Chemical Engineering, Northwest Normal University, Lanzhou, 730070, China
| | - Peiyu Cao
- Key Lab. Eco-Functional Polymer Materials of MOE, Institute of Polymer, College of Chemistry & Chemical Engineering, Northwest Normal University, Lanzhou, 730070, China
| | - Yaping Zhang
- Key Lab. Eco-Functional Polymer Materials of MOE, Institute of Polymer, College of Chemistry & Chemical Engineering, Northwest Normal University, Lanzhou, 730070, China
| | - Meiling Zhou
- Key Lab. Eco-Functional Polymer Materials of MOE, Institute of Polymer, College of Chemistry & Chemical Engineering, Northwest Normal University, Lanzhou, 730070, China
| | - Qianqian Wang
- Key Lab. Eco-Functional Polymer Materials of MOE, Institute of Polymer, College of Chemistry & Chemical Engineering, Northwest Normal University, Lanzhou, 730070, China
| | - Rongmin Wang
- Key Lab. Eco-Functional Polymer Materials of MOE, Institute of Polymer, College of Chemistry & Chemical Engineering, Northwest Normal University, Lanzhou, 730070, China
| | - Pengfei Song
- Key Lab. Eco-Functional Polymer Materials of MOE, Institute of Polymer, College of Chemistry & Chemical Engineering, Northwest Normal University, Lanzhou, 730070, China
| | - Yufeng He
- Key Lab. Eco-Functional Polymer Materials of MOE, Institute of Polymer, College of Chemistry & Chemical Engineering, Northwest Normal University, Lanzhou, 730070, China.
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Magnetic, Electronic, and Optical Studies of Gd-Doped WO3: A First Principle Study. Molecules 2022; 27:molecules27206976. [PMID: 36296569 PMCID: PMC9610449 DOI: 10.3390/molecules27206976] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2022] [Revised: 10/07/2022] [Accepted: 10/10/2022] [Indexed: 11/16/2022] Open
Abstract
Tungsten trioxide (WO3) is mainly studied as an electrochromic material and received attention due to N-type oxide-based semiconductors. The magnetic, structural, and optical behavior of pristine WO3 and gadolinium (Gd)-doped WO3 are being investigated using density functional theory. For exchange-correlation potential energy, generalized gradient approximation (GGA+U) is used in our calculations, where U is the Hubbard potential. The estimated bandgap of pure WO3 is 2.5 eV. After the doping of Gd, some states cross the Fermi level, and WO3 acts as a degenerate semiconductor with a 2 eV bandgap. Spin-polarized calculations show that the system is antiferromagnetic in its ground state. The WO3 material is a semiconductor, as there is a bandgap of 2.5 eV between the valence and conduction bands. The Gd-doped WO3’s band structure shows few states across the Fermi level, which means that the material is metal or semimetal. After the doping of Gd, WO3 becomes the degenerate semiconductor with a bandgap of 2 eV. The energy difference between ferromagnetic (FM) and antiferromagnetic (AFM) configurations is negative, so the Gd-doped WO3 system is AFM. The pure WO3 is nonmagnetic, where the magnetic moment in the system after doping Gd is 9.5599575 μB.
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Aihemaiti X, Wang X, Li Y, Wang Y, Xiao L, Ma Y, Qi K, Zhang Y, Liu J, Li J. Enhanced photocatalytic and antibacterial activities of S-scheme SnO 2/Red phosphorus photocatalyst under visible light. CHEMOSPHERE 2022; 296:134013. [PMID: 35181430 DOI: 10.1016/j.chemosphere.2022.134013] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2021] [Revised: 01/10/2022] [Accepted: 02/14/2022] [Indexed: 06/14/2023]
Abstract
The construction of wide bandgap semiconductors with heterojunctions is an effective strategy to improve the photocatalytic activity of narrow-bandgap semiconductors, such as red phosphorus (RP). The novel step-scheme (S-scheme) heterojunction can separate photocarriers effectively while retaining the high reduction-oxidation capacity of the catalyst. Herein, a SnO2/hydrothermally treated RP (SnO2/HRP) S-scheme heterojunction was constructed and was found to display superior performance in the photocatalytic degradation of pollutants and the disinfection of bacteria. The 5%SnO2/HRP (mass ration of SnO2 with 5 wt%) composite had the strongest photocatalytic activity. It could degrade 97.5% of Rhodamine B (RhB) after 12 min of light exposure. The photodegradation rate constant of this composite reached 2.96 × 10-1 min-1, which was 4.4 and 59.2 times higher than that of pure HRP and SnO2, respectively. Furthermore, this S-scheme heterojunction composite exhibited a higher efficient photocatalytic antibacterial rate (99.4%) for Escherichia coli (E. coli) under visible-light irradiation, than pure HRP (66.4%) and SnO2 (72.9%). Further mechanistic investigations illustrated that the intimate contact between HRP and SnO2 in the S-scheme system heterojunction could effectively boost carrier transfer and improve the photocatalytic activity of the semiconductor. This investigation provided an efficient recyclable S-scheme heterojunction composite for the photocatalytic degradation of pollutants and bacteria.
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Affiliation(s)
- Xiadiye Aihemaiti
- College of Chemistry and Chemical Engineering, Xinjiang Normal University, Urumqi, 830054, China
| | - Xin Wang
- College of Chemistry and Chemical Engineering, Xinjiang Normal University, Urumqi, 830054, China; Xinjiang Key Laboratory of Energy Storage and Photoelectroctalytic Materials, Xinjiang Normal University, Urumqi, 830054, China
| | - Yunpeng Li
- College of Chemistry and Chemical Engineering, Xinjiang Normal University, Urumqi, 830054, China
| | - Yun Wang
- College of Chemistry and Chemical Engineering, Xinjiang Normal University, Urumqi, 830054, China; Xinjiang Key Laboratory of Energy Storage and Photoelectroctalytic Materials, Xinjiang Normal University, Urumqi, 830054, China
| | - Lu Xiao
- College of Chemistry and Chemical Engineering, Xinjiang Normal University, Urumqi, 830054, China; Xinjiang Key Laboratory of Energy Storage and Photoelectroctalytic Materials, Xinjiang Normal University, Urumqi, 830054, China
| | - Yuhua Ma
- College of Chemistry and Chemical Engineering, Xinjiang Normal University, Urumqi, 830054, China; Xinjiang Key Laboratory of Energy Storage and Photoelectroctalytic Materials, Xinjiang Normal University, Urumqi, 830054, China.
| | - Kezhen Qi
- Institute of Catalysis for Energy and Environment, College of Chemistry and Chemical Engineering, Shenyang Normal University, Shenyang, 110034, China
| | - Yu Zhang
- College of Chemistry and Chemical Engineering, Xinjiang Normal University, Urumqi, 830054, China
| | - Jing Liu
- College of Chemistry and Chemical Engineering, Xinjiang Normal University, Urumqi, 830054, China
| | - Jinyu Li
- College of Chemistry and Chemical Engineering, Xinjiang Normal University, Urumqi, 830054, China.
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14
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Application of Spinel and Hexagonal Ferrites in Heterogeneous Photocatalysis. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app112110160] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Semiconducting materials display unique features that enable their use in a variety of applications, including self-cleaning surfaces, water purification systems, hydrogen generation, solar energy conversion, etc. However, one of the major issues is separation of the used materials from the process suspension. Therefore, chemical compounds with magnetic properties have been proposed as crucial components of photocatalytic composites, facilitating separation and recovery of photocatalysts under magnetic field conditions. This review paper presents the current state of knowledge on the application of spinel and hexagonal ferrites in heterogeneous photocatalysis. The first part focuses on the characterization of magnetic (nano)particles. The next section presents the literature findings on the single-phase magnetic photocatalyst. Finally, the current state of scientific knowledge on the wide variety of magnetic-photocatalytic composites is presented. A key aim of this review is to indicate that spinel and hexagonal ferrites are considered as an important element of heterogeneous photocatalytic systems and are responsible for the effective recycling of the photocatalytic materials.
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Naz M, Irfan M, Shukrullah S, Ahmad I, Ghaffar A, Niazi UM, Rahman S, Jalalah M, Alsaiari M, Khan M. Effect of microwave plasma treatment on magnetic and photocatalytic response of manganese ferrite nanoparticles for wastewater treatment. MAIN GROUP CHEMISTRY 2021. [DOI: 10.3233/mgc-210065] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The conventionally synthesized nano-ferrite materials do not possess bulk properties, generally required for their use in mainstream industry. To make ferrite nanoparticles clinically applicable materials, it is important to have good control over morphology and optical properties of these materials. In this study, low-pressure microwave plasma was used to tailor the structural properties and surface chemistry of manganese ferrite nanoparticles. A facile sol-gel method was used to prepare cubic spinal structures of manganese ferrite nanoparticles. These nanoparticles were exposed to oxygen plasma sustained with a microwave source for improving their magnetic and photocatalytic activities. The techniques like XRD, SEM, PL, UV-Vis DRS, transient photocurrent response and EIS were used to characterize the samples. The plasma treated nanoparticles were used to degraded methyl blue (MB) dye in the solution. The photocatalytic activity showed 85% degradation of MB after 100 min of exposure of visible light. The second part of the paper studied the magnetic properties of the nanoparticles. The saturation magnetization decreased from 0.78 emu/g to 0.68 emu/g after plasma treatment of nanoparticles.
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Affiliation(s)
- M.Y. Naz
- Department of Physics, University of Agriculture, Faisalabad, Pakistan
| | - M. Irfan
- Electrical Engineering Department, College of Engineering, Najran University Saudi Arabia, Najran, Saudi Arabia
| | - S. Shukrullah
- Department of Physics, University of Agriculture, Faisalabad, Pakistan
| | - I. Ahmad
- Department of Physics, University of Agriculture, Faisalabad, Pakistan
| | - A. Ghaffar
- Department of Physics, University of Agriculture, Faisalabad, Pakistan
| | - U. M. Niazi
- Mechanical Engineering Department, National University of Technology, Pakistan
| | - S. Rahman
- Electrical Engineering Department, College of Engineering, Najran University Saudi Arabia, Najran, Saudi Arabia
| | - M. Jalalah
- Electrical Engineering Department, College of Engineering, Najran University Saudi Arabia, Najran, Saudi Arabia
- Promising Centre For Sensors and Electronic Devices (PCSED), Najran University Saudi Arabia, Najran, Saudi Arabia
| | - M.A. Alsaiari
- Empty quarter research unit, Chemistry department, college of Science and art at Sharurah, Najran University Saudi Arabia, Najran, Saudi Arabia
| | - M.K.A. Khan
- Mechanical Engineering Department, College of Engineering, Najran University Saudi Arabia, Najran, Saudi Arabia
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16
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Singh A, Kaushik V, Chahal S, Goswami A, Nain S. Efficient Degradation of Methylene Blue Dye and Antibacterial Performance of Shape Controlled RuO
2
Nanocomposites. ChemistrySelect 2021. [DOI: 10.1002/slct.202102546] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Amanvir Singh
- Department of Chemistry Deenbandhu Chhotu Ram University of Science and Technology Murthal 131039 Haryana India
| | - Vikas Kaushik
- Department of Biotechnology Deenbandhu Chhotu Ram University of Science and Technology Murthal 131039 Haryana India
| | - Surjeet Chahal
- Department of Physics Deenbandhu Chhotu Ram University of Science and Technology Murthal 131039 Haryana India
| | - Arkaja Goswami
- Department of Chemistry Shyamlal College University of Delhi 110032 New Delhi India
| | - Sonia Nain
- Department of Chemistry Deenbandhu Chhotu Ram University of Science and Technology Murthal 131039 Haryana India
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