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Sa N, Alkhayer K, Behera A. Efficient removal of environmental pollutants by green synthesized metal nanoparticles of Clitoriaternatea. Heliyon 2024; 10:e29865. [PMID: 38707360 PMCID: PMC11066322 DOI: 10.1016/j.heliyon.2024.e29865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2024] [Revised: 04/08/2024] [Accepted: 04/16/2024] [Indexed: 05/07/2024] Open
Abstract
Prevention and management of water pollution are becoming a great challenge in the present scenario. Different conventional methods like carbon adsorption, ion exchange, chemical precipitation, evaporation, and biological treatments remove water pollutants. Nowadays, the requirement for effective, non-toxic and safe waste management strategies is very high. Nanomaterials have been explored in various fields due to their unique characteristics. Green synthesis of nanomaterial is becoming more popular due to their safety, non-toxicity, and ease of scale-up technology. Metal nanoparticles can be synthesized using a green synthesis method using biological sources provided by eco-friendly, non-hazardous nanomaterials with superior properties to bulk metals. Hence, this study has designed a green synthesis of magnetic (cobalt oxide) and noble (gold) nanoparticles from the fresh flowers of Clitoria ternatea. The flavonoids and polyphenols in the extract decreased the energy band gap of cobalt oxide and gold nanoparticles; hence, the capping of the natural constituents in Clitoria ternatea helped form stable metal nanoparticles. The cobalt oxide and gold nanoparticles are evaluated for their potential for eliminating organic pollutants from industrial effluent. The novelty of this present work represents the application of cobalt oxide nanoparticles in the removal of organic pollutants and a comparative study of the catalytic behaviour of both metal nanoparticles. The degradation of bromophenol blue, bromocresol green, and 4-nitrophenol in the presence of gold nanoparticles was completed in 120, 45, and 20 min with rate constants of 3.7 × 10-3/min, 6.9 × 10-3/min, and 16.5 × 10-3/min, respectively. Similarly, the photocatalysis of bromophenol blue, bromocresol green, and 4-nitrophenol in the presence of cobalt oxide nanoparticles was achieved in 60, 90, and 40 min with rate constants of 2.3 × 10-3/min, 1.8 × 10-3/min, and 1.7 × 10-3/min, respectively. The coefficient of correlation (R2) values justify that the degradation of organic pollutants follows first-order kinetics. The significance of the study is to develop green nanomaterials that can be used efficiently to remove organic pollutants in wastewater using a cost-effective method with minimal toxicity to aquatic animals. It has proved to be useful in environmental pollution management.
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Affiliation(s)
- Nishigandha Sa
- School of Pharmaceutical Sciences, Siksha' O’ Anusandhan Deemed to be University, Bhubaneswar, Odisha, India
| | - Khider Alkhayer
- School of Pharmaceutical Sciences, Siksha' O’ Anusandhan Deemed to be University, Bhubaneswar, Odisha, India
| | - Anindita Behera
- College of Pharmaceutical Sciences, Dayanand Sagar University, Shavige Malleshwara Hills, 95th Cross Rd, 1st Stage, Kumaraswamy Layout, Bengaluru, Karnataka, 560078, India
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Ali H, Yadav Y, Ali D, Kumar G, Alarifi S. Biosynthesis and characterization of cobalt nanoparticles using combination of different plants and their antimicrobial activity. Biosci Rep 2023; 43:BSR20230151. [PMID: 37334676 PMCID: PMC10329184 DOI: 10.1042/bsr20230151] [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: 02/18/2023] [Revised: 05/31/2023] [Accepted: 06/14/2023] [Indexed: 06/20/2023] Open
Abstract
It has become crucial to biosynthesize efficient, secure, and affordable nanoparticles that we use for the treatment of various infections, including surgical site infection and wound infection, due to the rapid development of microbial resistance to numerous antibiotic drugs. The objective of the present study is to biosynthesize cobalt nanoparticles using an extract from the combined peels of garlic (Allium sativum) and onion (Allium cepa). Scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), and X-ray diffraction were used to confirm the synthesis of cobalt nanoparticle (XRD). Well diffusion was used to measure antimicrobial activity. Escherichia coli, Proteus, Staphylococcus aureus, Staphylococcus cohnii, and Klebsiella pneumonia were the bacterial strains employed Both the crude prepared extract and the biosynthesized cobalt nanoparticles demonstrated efficacy against all strains of bacteria, but the crude prepared extract displayed a low zone of inhibition ranging from 10 to 13 mm, while the biosynthesized cobalt nanoparticles displayed a high zone of inhibition ranging from 20 to 24 mm.
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Affiliation(s)
- Huma Ali
- Department of Chemistry, Maulana Azad National Institute of Technology, Bhopal 462003, India
| | - Yashwant Kumar Yadav
- Department of Mechanical Engineering, Maulana Azad National Institute of Technology, Bhopal 462003, India
| | - Daoud Ali
- Department of Zoology, College of Science, King Saud University, PO Box 2455 Riyadh, 11451, Saudi Arabia
| | - Gokhlesh Kumar
- Clinical Division of Fish Medicine, University of Veterinary Medicine Vienna, 1210 Vienna, Austria
| | - Saud Alarifi
- Department of Zoology, College of Science, King Saud University, PO Box 2455 Riyadh, 11451, Saudi Arabia
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3
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Lian Q, Chen L, Peng G, Zheng X, Liu Z, Wu S. Preparation of the layered structure Ag@Co3O4 composites as peroxidase memetic for colorimetric detection of ascorbic acid. Chem Phys 2023. [DOI: 10.1016/j.chemphys.2023.111895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
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4
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Waste-Extracted Zn and Ag Co-Doped Spent Catalyst-Extracted V2O5 for Photocatalytic Degradation of Congo Red Dye: Effect of Metal-Nonmetal Co-Doping. Catalysts 2023. [DOI: 10.3390/catal13030584] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/15/2023] Open
Abstract
The current study applies the eco-friendly principle of “wastes treat wastes”. By swift methods, a composite photocatalyst was prepared from waste-extracted oxides, namely V2O5, Ag, and ZnO. The metal–lixiviant complexes were used as metal precursors, where the lixiviants act as auto-templates and increase the compatibility between the mixed metallic species, and their controlled thermal removal generates pores. The tri-constitute composite catalyst was doped with nitrogen. The constitution, surface composition, and optical properties of the doped catalysts were investigated by XRD, SEM, TEM, BET surface analysis, XPS, diffuse reflectance, and PL spectra. The as-prepared catalysts were employed in the photodegradation of Congo red dye (CR) under visible irradiation at ambient temperature. The degree of Ag dispersion had a significant effect on the bandgap, as did metal and metal-nonmetal co-doping. The efficiency of dye removal changes dramatically with time up to 120 min, after which it begins to decrease. According to the pH effect, the normal pH of Congo red dye (6.12) is optimal. At a catalyst dose of 1 g L−1 and an irradiation period of 120 min, photodegradation efficiency reached 89.9% and 83.4% over [Ag0.05 ZnO0.05 V2O5(0.90)] and [Ag0.05 ZnO0.05 V2O5(0.90)]N, respectively. The kinetic study depicted the significant role of mass transfer in the reaction rate. The obtained rate constants were 0.995 mole L−1 S−1 and 0.998 mole L−1 S−1 for [Ag0.05 ZnO0.05 V2O5(0.90)] and [Ag0.05 ZnO0.05 V2O5(0.90)]N, respectively.
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Alem AF, Worku AK, Ayele DW, Wubieneh TA, Teshager AA, Tadele mihret kndie, Admasu BT, Teshager MA, Asege AA, Ambaw MD, Zeleke MA, Shibesh AK, Yemata TA. Ag doped Co 3O 4 nanoparticles for high-performance supercapacitor application. Heliyon 2023; 9:e13286. [PMID: 36816229 PMCID: PMC9929304 DOI: 10.1016/j.heliyon.2023.e13286] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 01/23/2023] [Accepted: 01/25/2023] [Indexed: 02/03/2023] Open
Abstract
Ag doped Co3O4 nanoparticles (NPs) were synthesized via a co-precipitation method changing the concentration of Ag. The crystal structure, morphology, surface area, functional group, optical band gap, and thermal property were investigated by XRD, SEM, BET, FTIR, UV-Vis, and TGA/DTA techniques. The XRD results showed the formation of single-cubic Co3O4 nanostructured materials with an average crystal size of 19.37 nm and 12.98 nm for pristine Co3O4 and 0.25 M Ag-doped Co3O4 NPs. Morphological studies showed that pristine Co3O4 and 0.25 M Ag-doped Co3O4 NPs having a porous structure with small spherical grains, porous structures with sponge-like structures, and loosely packed porous structures, respectively. The pristine and 0.25 M Ag-doped Co3O4 NPs showed BET surface areas of 53.06 m2/g, and 407.33 m2/g, respectively. The band gap energy of Co3O4 NPs were 2.96 eV, with additional sub-bandgap energy of 1.95 eV. Additionally, it was discovered that the band gap energies of 0.25 M Ag-doped Co3O4 NPs ranged from 2.2 to 2.75 eV, with an extra sub-band with energies ranging from 1.43 to 1.94 eV for all as-prepared samples. The Ag-doped Co3O4 as prepared samples show improved thermal properties due to the doping effect of silver. The CV test confirmed that the 0.25 M Ag-doped Co3O4 NPs exhibited the highest specific capacitance value of 992.7 F/g at 5 mV/s in a 0.1 M KOH electrolyte solution. The energy density and power density of 0.25 M Ag-doped Co3O4 NPs were 27.9 W h/kg and 3816.1 W/kg, respectively.
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Affiliation(s)
- Asab Fetene Alem
- Bahir Dar Energy Center, Bahir Dar Institute of Technology, Bahir Dar University, P.O. Box 26, Bahir Dar, Ethiopia
| | - Ababay Ketema Worku
- Bahir Dar Energy Center, Bahir Dar Institute of Technology, Bahir Dar University, P.O. Box 26, Bahir Dar, Ethiopia,Corresponding author.
| | - Delele Worku Ayele
- Bahir Dar Energy Center, Bahir Dar Institute of Technology, Bahir Dar University, P.O. Box 26, Bahir Dar, Ethiopia,Department of Chemistry, College of Science, Bahir Dar University, P.O. Box 79, Bahir Dar, Ethiopia,Corresponding author. Bahir Dar Energy Center, Bahir Dar Institute of Technology, Bahir Dar University, P.O. Box 26, Bahir Dar, Ethiopia
| | - Tessera Alemneh Wubieneh
- School of Materials Science and Engineering, Bahir Dar University, P.O. Box 79, Bahir Dar, Ethiopia
| | - Alebel abebaw Teshager
- Faculty of Chemical and Food Engineering, Bahir Dar Institute of Technology-Bahir Dar University, P.O. Box 26, Bahir Dar, Ethiopia
| | - Tadele mihret kndie
- Faculty of Chemical and Food Engineering, Bahir Dar Institute of Technology-Bahir Dar University, P.O. Box 26, Bahir Dar, Ethiopia
| | - Bimrew Tamrat Admasu
- Faculty of Mechanical Engineering, Bahir Dar Institute of Technology-Bahir Dar University, P.O. Box 26, Bahir Dar, Ethiopia
| | - Minbale Admas Teshager
- Department of Chemistry, College of Science, Bahir Dar University, P.O. Box 79, Bahir Dar, Ethiopia
| | - Addisu Alemayehu Asege
- School of Materials Science and Engineering, Bahir Dar University, P.O. Box 79, Bahir Dar, Ethiopia
| | - Mehary Dagnew Ambaw
- Department of Industrial Chemistry, College of Science, Bahir Dar University, P.O. Box 79, Bahir Dar, Ethiopia
| | - Misganaw Alemu Zeleke
- School of Materials Science and Engineering, Bahir Dar University, P.O. Box 79, Bahir Dar, Ethiopia
| | - Alemayehu Kifle Shibesh
- Faculty of Chemical and Food Engineering, Bahir Dar Institute of Technology-Bahir Dar University, P.O. Box 26, Bahir Dar, Ethiopia
| | - Temesgen Atnafu Yemata
- Faculty of Chemical and Food Engineering, Bahir Dar Institute of Technology-Bahir Dar University, P.O. Box 26, Bahir Dar, Ethiopia,Corresponding author.
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Shalaby NH. Photocatalytic Performance of Organically Templated Cr-Doped Co3O4 in Remediation of Industrial Wastewater: Effect of Order–Disorder in the Lattice. ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING 2022. [DOI: 10.1007/s13369-022-07471-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
AbstractIn photocatalysis, the optical properties and surface parameters significantly affect the catalytic performance. To engineer the optical properties and textural structure, Cr and p-phenylene diamine (PDA) were utilized as dopant and textural structure regulator, respectively. A series of Cr-doped Co3O4 with dopant percentages of 0, 1, 3, and 5, templated PDA at a fixed ratio of 5%, and another un-templated sample with a dopant ratio of 5% were prepared. The co-precipitation method was applied in swift and innovative procedures, where a calculated amount of NaOH was used as a precipitant. The optical properties, dopant concentration quenching, and surface parameters are strongly affected by the order–disorder in the lattice and dopant concentration. The lattice regularity affects the optical properties and the surface parameters along with the dopant concentration. The photocatalysts were evaluated in the disposal of organic pollutants in a representative sample of wastewater collected from different industrial activities. The function of another function was applied to monitor the pollutants' disposal, taking the total organic carbon (TOC) as a function of the pollutants' concentration and the photometric absorbance as a function of the TOC. The kinetic investigation exhibited the significant role of the pore system on the reaction rate.
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Green Synthesis and Characterization of Cobalt Oxide Nanoparticles Using Psidium guajava Leaves Extracts and Their Photocatalytic and Biological Activities. Molecules 2022; 27:molecules27175646. [PMID: 36080410 PMCID: PMC9457729 DOI: 10.3390/molecules27175646] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Revised: 08/18/2022] [Accepted: 08/24/2022] [Indexed: 11/17/2022] Open
Abstract
The advanced technology for synthesizing nanoparticles utilizes natural resources in an environmentally friendly manner. Additionally, green synthesis is preferred to chemical and physical synthesis because it takes less time and effort. The green synthesis of cobalt oxide nanoparticles has recently risen due to its physico-chemical properties. In this study, many functional groups present in Psidium guajava leaf extracts are used to stabilize the synthesis of cobalt oxide nanoparticles. The biosynthesized cobalt oxide nanoparticles were investigated using UV-visible spectroscopic analysis. Additionally, Fourier-transform infrared spectroscopy revealed the presence of carboxylic acids, hydroxyl groups, aromatic amines, alcohols and phenolic groups. The X-ray diffraction analysis showed various peaks ranging from 32.35 to 67.35°, and the highest intensity showed at 36.69°. The particle size ranged from 26 to 40 nm and confirmed the average particle size is 30.9 nm. The green synthesized P. guajava cobalt oxide nanoparticles contain cobalt as the major abundant element, with 42.26 wt% and 18.75 at% confirmed by the EDAX techniques. SEM images of green synthesized P. guajava cobalt oxide nanoparticles showed agglomerated and non-uniform spherical particles. The anti-bacterial activity of green synthesized P. guajava cobalt oxide nanoparticles was evaluated against Gram-positive Staphylococcus aureus and Gram-negative Escherichia coli with a 7 to 18 mm inhibitory zone. The photocatalytic activity was evaluated using green synthesized P. guajava cobalt oxide nanoparticles and observed 79% of dye degradation. The MTT assay of P. guajava cobalt oxide nanoparticles showed an excellent cytotoxic effect against MCF 7 and HCT 116 cells compared to normal cells. The percentage of cell viability of P. guajava cobalt oxide nanoparticles was observed as 90, 83, 77, 68, 61, 58 and 52% for MCF-7 cells and 82, 70, 63, 51, 43, 40, and 37% for HCT 116 cells at the concentration of 1.53, 3.06, 6.12, 12.24, 24.48, 50, and 100 μg/mL compared to control cells. These results confirmed that green synthesized P. guajava cobalt oxide nanoparticles have a potential photocatalytic and anti-bacterial activity and also reduced cell viability against MCF-7 breast cancer and HCT 116 colorectal cancer cells.
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Oxone activated TiO2 in presence of UV-LED light for the degradation of moxifloxacin: A mechanistic study. ARAB J CHEM 2022. [DOI: 10.1016/j.arabjc.2022.104061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Prakash N, Balaji R, Govindaraju S, Steffi AP, Santhanalakshmi N, Mohanraj K, Selvarajan E, Chandrasekar N, Samuel MS. Influence of 2D template-assisted (SBA-15) metal oxide Co 3O 4 for pseudocapacitive and dye degradation application. ENVIRONMENTAL RESEARCH 2022; 204:112383. [PMID: 34813864 DOI: 10.1016/j.envres.2021.112383] [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: 08/18/2021] [Revised: 11/02/2021] [Accepted: 11/10/2021] [Indexed: 06/13/2023]
Abstract
Cobalt oxide (Co3O4) is a low-cost material exhibiting excellent physicochemical and photocatalytic properties indicating its potential use for next-generation eco-friendly energy storage and photocatalytic degradation applications. In this study, Co3O4 nanoarcs were synthesized using SBA-15 as a template by microwave-assisted method to form an S15/m-Co3O4 product. Characterization was done by low and wide-angle X-Ray diffraction, and Fourier transformed infra-red spectroscopic studies confirming the presence of S15/m-Co3O4. Scanning Electron Microscope images proved the agglomerated nanotube and nanoarcs like the structure of SBA-15 and S15/m- Co3O4, respectively. Electrochemical studies included cyclic voltammetry, charge/discharge, retention capacity, and electron impedance spectroscopy studies in a 3-electrode system. S15/m-Co3O4 nanoarcs, as the electrode material, was revealed to have a specific capacity of 87.5 C/g in 1 M KOH solution. Upon running 1000 cycles, the material had excellent capacity retention of 87%. The S15/m-Co3O4 product also underwent photocatalytic degradation studies. The Rhodamine R6G dye degradation by S15/m-Co3O4 under UV irradiation exhibited a high degradation percentage of 97.7%, following the first-order kinetics. S15/m-Co3O4 has proven to be biocompatible and can be used to enhance supercapacitors which are an ideal alternative to conventional batteries for energy storage applications. Thus, the data produced proves S15/m-Co3O4 nanoarcs is an excellent electrode material for pseudocapacitive application and a catalyst for photocatalytic degradation of dye molecules.
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Affiliation(s)
- Natarajan Prakash
- Department of Nanoscience and Technology, Sri Ramakrishna Engineering College, Coimbatore, 641022, India
| | - Ramachandran Balaji
- Department of chemical engineering and Biotechnology National Taipei University of Technology Taiwan, 106, Taiwan
| | | | - Alexander Pinky Steffi
- Department of Nanoscience and Technology, Sri Ramakrishna Engineering College, Coimbatore, 641022, India
| | - Nagendran Santhanalakshmi
- Department of Advanced Biochemistry, University of Strathclyde, Glasgow, G1 1XQ, UK; Department of Environment Engineering and Management, Chaoyang University of Technology, Taiwan, ROC
| | - Kumar Mohanraj
- Department of Environment Engineering and Management, Chaoyang University of Technology, Taiwan, ROC
| | - Ethiraj Selvarajan
- Department of Genetic Engineering, School of Bioengineering, College of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, Chennai, 603203, India
| | - Narendhar Chandrasekar
- Department of Nanoscience and Technology, Sri Ramakrishna Engineering College, Coimbatore, 641022, India.
| | - Melvin S Samuel
- Department of Material Science and Engineering, University of Wisconsin-Milwaukee, Milwaukee, WI, USA
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Saeed M, Khan I, Adeel M, Akram N, Muneer M. Synthesis of a CoO–ZnO photocatalyst for enhanced visible-light assisted photodegradation of methylene blue. NEW J CHEM 2022. [DOI: 10.1039/d1nj05633f] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Mechanism of photodegradation of methylene blue over CoO–ZnO photocatalyst.
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Affiliation(s)
- Muhammad Saeed
- Department of Chemistry, Government College University Faisalabad, Pakistan
| | - Iltaf Khan
- College of Chemical and Materials Engineering, Beijing Institute of Petrochemical Technology, Beijing, P. R. China
- School of Chemistry and Environment, Beijing University of Aeronautics and Astronautics, Beijing 100191, China
| | - Muhammad Adeel
- Department of Chemistry, Government College University Faisalabad, Pakistan
| | - Nadia Akram
- Department of Chemistry, Government College University Faisalabad, Pakistan
| | - Majid Muneer
- Department of Chemistry, Government College University Faisalabad, Pakistan
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Pan F, Wang Y, Zhao K, Hu J, Liu H, Hu Y. Photocatalytic degradation of tetracycline hydrochloride with visible light-responsive bismuth tungstate/conjugated microporous polymer. Chin J Chem Eng 2022. [DOI: 10.1016/j.cjche.2021.08.030] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Saeed M, Muneer M, Haq AU, Akram N. Photocatalysis: an effective tool for photodegradation of dyes-a review. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:293-311. [PMID: 34523090 DOI: 10.1007/s11356-021-16389-7] [Citation(s) in RCA: 48] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Accepted: 09/03/2021] [Indexed: 06/13/2023]
Abstract
The disposal of dye-contaminated wastewater is a major concern around the world for which a variety of techniques are used for its treatment. The photocatalytic treatment of dye-contaminated wastewater is one of the treatment methods. Semiconductor-assisted photocatalytic treatment of dye-contaminated wastewater has gained pronounced attention recently. This review outlines the recent advancements in the photocatalytic treatment of dye-contaminated wastewater. The photocatalytic degradation of dyes follows three types of mechanisms: (1) dye sensitization through charge injection, (2) indirect dye degradation through oxidation/reduction, and (3) direct photolysis of dye. Several experimental parameters like initial concentration of dyes, pH, and catalyst dosage significantly affect the photocatalytic degradation of dyes. The photocatalytic materials can be categorized into three generations. The single-component (e.g., ZnO, TiO2) and multiple component semiconductor metal oxides (e.g., ZnO-TiO2, Bi2O3-ZnO) are categorized as first-generation and second-generation photocatalysts, respectively. The photocatalysts dispersed on an inert solid substrate (e.g., Ag-Al2O3, ZnO-C) are classified as third-generation photocatalysts. Finally, we reviewed the challenges that affect the photocatalytic degradation of dyes.
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Affiliation(s)
- Muhammad Saeed
- Department of Chemistry, Government College University, Faisalabad, Pakistan.
| | - Majid Muneer
- Department of Chemistry, Government College University, Faisalabad, Pakistan
| | - Atta Ul Haq
- Department of Chemistry, Government College University, Faisalabad, Pakistan
| | - Nadia Akram
- Department of Chemistry, Government College University, Faisalabad, Pakistan
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Adeel M, Saeed M, Khan I, Muneer M, Akram N. Synthesis and Characterization of Co-ZnO and Evaluation of Its Photocatalytic Activity for Photodegradation of Methyl Orange. ACS OMEGA 2021; 6:1426-1435. [PMID: 33490802 PMCID: PMC7818618 DOI: 10.1021/acsomega.0c05092] [Citation(s) in RCA: 66] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Accepted: 12/29/2020] [Indexed: 05/20/2023]
Abstract
Photocatalysis is one of the techniques used for the eradication of organic pollutants from wastewater. In this study, Co-ZnO was tested as a photocatalyst for the degradation of methyl orange under irradiation of visible light. Co-ZnO loaded with 5%, 10%, and 15% Co was prepared by the precipitation method. The advanced techniques including X-ray diffraction, X-ray photoelectron spectroscopy, diffuse reflectance UV-visible spectroscopy, photoelectrochemical measurements, temperature-programmed desorption, photoluminescence, and fluorescence spectroscopy related to OH• measurements were used for characterization of prepared Co-ZnO. Experiments showed that 10% Co-ZnO was a highly efficient catalyst for the photodegradation of methyl orange as compared to ZnO. The enhanced photocatalytic activity of Co-ZnO is attributed to the implantation of Co which inhibits the electron-hole recombination. A 100 mg/L solution of methyl orange dye was completely degraded within 130 min. The reaction kinetics has been described in terms of the Eley-Rideal mechanism.
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Affiliation(s)
- Muhammad Adeel
- Department
of Chemistry, Government College University
Faisalabad, Faisalabad 38000, Pakistan
| | - Muhammad Saeed
- Department
of Chemistry, Government College University
Faisalabad, Faisalabad 38000, Pakistan
- . Phone: +92 346 9010903
| | - Iltaf Khan
- College
of Chemical and Materials Engineering, Beijing
Institute of Petrochemical Technology, Beijing 102617, China
| | - Majid Muneer
- Department
of Chemistry, Government College University
Faisalabad, Faisalabad 38000, Pakistan
| | - Nadia Akram
- Department
of Chemistry, Government College University
Faisalabad, Faisalabad 38000, Pakistan
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Pd on magnetic hybrid of halloysite and POSS‐containing copolymer: An efficient catalyst for dye reduction. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.6006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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15
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Biomass-Derived Activated Carbon as a Catalyst for the Effective Degradation of Rhodamine B dye. Processes (Basel) 2020. [DOI: 10.3390/pr8080926] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Activated carbon (AC) was fabricated from carrot waste using ZnCl2 as the activating agent and calcined at 700 °C for 2 h in a tube furnace. The as-synthesized AC was characterized using Fourier-transform infrared spectroscopy, X-ray diffraction analysis, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, and Brunauer–Emmett–Teller analysis; the results revealed that it exhibited a high specific surface area and high porosity. Moreover, this material displayed superior catalytic activity for the degradation of toxic Rhodamine B (RhB) dye. Rate constant for the degradation of RhB was ascertained at different experimental conditions. Lastly, we used the Arrhenius equation and determined that the activation energy for the decomposition of RhB using AC was approximately 35.9 kJ mol−1, which was very low. Hopefully it will create a great platform for the degradation of other toxic dye in near future.
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Saeed M, Usman M, Ibrahim M, Haq AU, Khan I, Ijaz H, Akram F. Enhanced photo catalytic degradation of methyl orange using p–n Co3O4-TiO2 hetero-junction as catalyst. INTERNATIONAL JOURNAL OF CHEMICAL REACTOR ENGINEERING 2020. [DOI: 10.1515/ijcre-2020-0004] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
AbstractPhoto catalytic degradation of pollutants is one of the techniques used for treatment of dye contaminated wastewater. TiO2 has attracted much attention as photo catalyst for treatment of contaminated water. In this study, the photo catalytic performance of TiO2 has been enhanced by formation of p–n Co3O4-TiO2 hetero-junction. The p–n Co3O4-TiO2 hetero-junction was prepared by wet incipient impregnation method and characterized by various techniques. The photo catalytic activity of prepared composite was evaluated by photo degradation of methyl orange. The as prepared Co3O4-TiO2 composite was found as effective catalyst than Co3O4 and TiO2. The higher photo catalytic activity was attributed to p–n junction formed between Co3O4 and TiO2. The degradation data was analyzed according to Eley–Rideal mechanism in terms of 1st and 2nd order kinetics.
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Affiliation(s)
- Muhammad Saeed
- Department of Chemistry, Government College University Faisalabad, Jhang Road, Faisalabad, Pakistan
| | - Muhammad Usman
- Department of Chemistry, Government College University Faisalabad, Jhang Road, Faisalabad, Pakistan
| | - Muhammad Ibrahim
- Department of Environmental Sciences & Engineering, Government College University Faisalabad, Faisalabad, Pakistan
| | - Atta ul Haq
- Department of Chemistry, Government College University Faisalabad, Jhang Road, Faisalabad, Pakistan
| | - Iltaf Khan
- Key Laboratory of Functional Inorganic Material Chemistry, Heilongjiang University, Harbin, PR China
| | - Hina Ijaz
- Department of Chemistry, Government College University Faisalabad, Jhang Road, Faisalabad, Pakistan
| | - Fiza Akram
- Department of Chemistry, Government College University Faisalabad, Jhang Road, Faisalabad, Pakistan
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17
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Sadjadi S, Koohestani F, Atai M.
Echinops bannaticus
plant and
Zinnia grandiflora
extract as char biosource and reducing agent for the biosynthesis of Ag on magnetic char‐polymer: An efficient catalyst for water treatment. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.5799] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Samahe Sadjadi
- Gas Conversion Department, Faculty of PetrochemicalsIran Polymer and Petrochemicals Institute PO Box 14975‐112 Tehran Iran
| | - Fatemeh Koohestani
- Gas Conversion Department, Faculty of PetrochemicalsIran Polymer and Petrochemicals Institute PO Box 14975‐112 Tehran Iran
| | - Mohammad Atai
- Polymer Science DepartmentIran Polymer and Petrochemical Institute PO Box 14975‐112 Tehran Iran
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18
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Torabi Momen M, Piri F, Karimian R. Photocatalytic degradation of rhodamine B and methylene blue by electrochemically prepared nano titanium dioxide/reduced graphene oxide/poly (methyl methacrylate) nanocomposite. REACTION KINETICS MECHANISMS AND CATALYSIS 2020. [DOI: 10.1007/s11144-020-01722-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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19
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Saeed M, Ibrahim M, Muneer M, Akram N, Usman M, Maqbool I, Adeel M, Nisar A. ZnO–TiO2: Synthesis, Characterization and Evaluation of Photo Catalytic Activity towards Degradation of Methyl Orange. Z PHYS CHEM 2019. [DOI: 10.1515/zpch-2019-1536] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Here in, we report the synthesis and characterization of ZnO–TiO2 composite as a potential photo catalyst for photo degradation of methyl orange under UV irradiation. ZnO–TiO2 with 1:1 ratio was synthesized via wet incipient impregnation method using TiO2 and Zn(NO3)2 ⋅ 6H2O as precursor material and the prepared composite was characterized by XRD, EDX and SEM. The synthesized composite was employed as photo catalyst for photo degradation of methyl orange. The photo degradation results showed that ZnO–TiO2 exhibited better catalytic performance than ZnO and TiO2 alone. The methyl orange photo degradation efficiency was determined to be 98, 75 and 60% over ZnO–TiO2, ZnO and TiO2 respectively using 50 mL solution of 100 mg/L at 40 °C for 120 min. The ZnO–TiO2 catalyzed photo degradation of methyl orange followed pseudo-first-order kinetic in terms of Langmuir–Hinshelwood mechanism.
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Affiliation(s)
- Muhammad Saeed
- Department of Chemistry , Government College University Faisalabad , Jhang Road , Faisalabad , Pakistan
| | - Muhammad Ibrahim
- Department of Environmental Sciences and Engineering , Government College University Faisalabad , Faisalabad , Pakistan
| | - Majid Muneer
- Department of Chemistry , Government College University Faisalabad , Jhang Road , Faisalabad , Pakistan
| | - Nadia Akram
- Department of Chemistry , Government College University Faisalabad , Jhang Road , Faisalabad , Pakistan
| | - Muhammad Usman
- Department of Chemistry , Government College University Faisalabad , Jhang Road , Faisalabad , Pakistan
| | - Iqra Maqbool
- Department of Chemistry , Government College University Faisalabad , Jhang Road , Faisalabad , Pakistan
| | - Muhammad Adeel
- Department of Chemistry , Government College University Faisalabad , Jhang Road , Faisalabad , Pakistan
| | - Asif Nisar
- Department of Chemistry , Government College University Faisalabad , Jhang Road , Faisalabad , Pakistan
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20
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Saeed M, Muneer M, Akram N, ul Haq A, Afzal N, Hamayun M. Synthesis and characterization of silver loaded alumina and evaluation of its photo catalytic activity on photo degradation of methylene blue dye. Chem Eng Res Des 2019. [DOI: 10.1016/j.cherd.2019.06.020] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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21
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Mulya Dewi NO, Yulizar Y, Bagus Apriandanu DO. Green synthesis of Co3O4 nanoparticles using Euphorbia heterophylla L. leaves extract: characterization and photocatalytic activity. ACTA ACUST UNITED AC 2019. [DOI: 10.1088/1757-899x/509/1/012105] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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22
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Green Synthesis of Ag–NiO and Investigation of its Catalytic Activity for Degradation of Rhodamine B Dye in Aqueous Medium. ACTA ACUST UNITED AC 2018. [DOI: 10.1515/zpch-2018-1226] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The plants assisted green synthesis of nanoparticles have drawn a momentous importance worldwide. NiO is one the metal oxides researched comprehensively for decades and still has dominance in the field of photo-catalysis. In present study NiO and Ag–NiO were successfully prepared by a simple and environmentally friendly method using nickel nitrate, silver nitrate and leaves extract of Azadirachta indica L. plant as precursor materials. The prepared materials were characterized by XRD, SEM and TGA. Then the photo-catalytic efficiency of NiO and Ag–NiO were evaluated by aqueous phase photo-degradation of rhodamine B as a model pollutant under ultraviolet irradiations. About 40% and 96% of 200 mg/L (50 mL) degraded in 120 min at 40 °C over NiO and Ag–NiO as photo-catalyst respectively. The apparent rate constants were determined as 0.0109, 0.0165, 0.0175 and 0.0190 per min at 30, 40, 50 and 60 °C respectively. 14.6 kJ/mol was calculated as activation energy of reaction.
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