101
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Moura MMDMS, Lima VE, Neto AADM, Lucena ALAD, Napoleão DC, Duarte MMMB. Degradation of the mixture of the ketoprofen, meloxicam and tenoxicam drugs using TiO 2/metal photocatalysers supported in polystyrene packaging waste. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2021; 83:863-876. [PMID: 33617493 DOI: 10.2166/wst.2021.025] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The solution mixture of the non-steroidal anti-inflammatory drugs ketoprofen, meloxicam and tenoxicam was degraded through systems, composed of different photocatalysts based on TiO2 (Fe and Cu) and the hydrogen peroxide oxidant. The monitoring was performed by UV-Vis spectroscopy. Under sunlight radiation, a reduction in peaks was observed with the use of impregnated photocatalysts. After 60 min, the sun/H2O2/Fe-TiO2 system reached degradations of 46.5% and 93.2% at 260 and 367 nm, respectively, and was selected for further studies. The degradation kinetic reached 92 and 96% of degradation after 180 min, for the λ of 260 and 367 nm, respectively. The kinetic curve could be represented by the empirical model proposed by Nichela and co-authors, indicating that besides the heterogeneous photocatalysis that occurs at the surface of the TiO2 there is also the joint effect of the photo-Fenton process. After the treatment, there was no toxicity to cress and lettuce seeds. However, a sensitivity of the thyme seeds to the compounds formed during the treatment was verified. After the fifth treatment cycle, the supported photocatalyst showed degradation higher than 82%. These results indicate that this system is suitable for the treatment of effluents containing pharmaceutical compounds.
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Affiliation(s)
- Maressa Maria de Melo Santos Moura
- Chemical Engineering Department, Universidade Federal de Pernambuco, Avenue Artur de Sá, s/n,Cidade Universitária, 50740-521, Recife, PE, Brasil E-mail:
| | - Victor Estolano Lima
- Department of Civil and Environmental Engineering, Universidade Federal de Pernambuco, Street Acadêmico Hélio Ramos, s/n, Cidade Universitária, 50740-530, Recife, PE, Brasil
| | - Antônio Acacio de Melo Neto
- Department of Civil and Environmental Engineering, Universidade Federal de Pernambuco, Street Acadêmico Hélio Ramos, s/n, Cidade Universitária, 50740-530, Recife, PE, Brasil
| | - Alex Leandro Andrade de Lucena
- Chemical Engineering Department, Universidade Federal de Pernambuco, Avenue Artur de Sá, s/n,Cidade Universitária, 50740-521, Recife, PE, Brasil E-mail:
| | - Daniella Carla Napoleão
- Chemical Engineering Department, Universidade Federal de Pernambuco, Avenue Artur de Sá, s/n,Cidade Universitária, 50740-521, Recife, PE, Brasil E-mail:
| | - Marta Maria M B Duarte
- Chemical Engineering Department, Universidade Federal de Pernambuco, Avenue Artur de Sá, s/n,Cidade Universitária, 50740-521, Recife, PE, Brasil E-mail:
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102
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Carvalho LM, Soares-Filho AF, Lima MS, Cruz-Filho JF, Dantas TCM, Luz GE. 2,4-Dichlorophenoxyacetic acid (2,4-D) photodegradation on WO 3-TiO 2-SBA-15 nanostructured composite. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:7774-7785. [PMID: 33037546 DOI: 10.1007/s11356-020-11085-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Accepted: 09/30/2020] [Indexed: 06/11/2023]
Abstract
A current environmental problem is the uncontrolled use of various pesticides that are harmful to the environment and public health. The herbicide 2,4-D is widely used, making it a vector of contamination for aquatic bodies, air, soil, and biomass. In recent decades, researchers have studied remediation of this compound in the environment. In this work, WO3 and TiO2 were supported on SBA-15 molecular sieve by the in situ anchoring (ISA) method, with different molar percentages of WO3 in relation to the oxide content: X = 25%, 50%, and 75%. The W-Ti-S (X) samples were characterized by XDR, XRF, Raman, FTIR, diffuse reflectance of UV-vis, and adsorption and desorption of N2. SBA-15 mesoporous structure was not destroyed even after the incorporation of the oxides. XRD analyses associated with Raman result found a predominance of the anatase phase for titanium oxide, and the FRX showed low incorporation of nanoparticles. Photocatalytic tests indicated that the catalytic activity depends on WO3 and TiO2 content, although all W-Ti-S (X) samples exhibited similar TOF value. The W-Ti-S (25) sample had the highest photocatalytic activity, 76% herbicide photodegradation under ultraviolet irradiation, at 270 min. The analysis of the catalytic cycles indicated that W-Ti-S (25) keeps out 70% of photocatalytic activity in the fourth catalytic cycle. In addition, the W-Ti-S (25) catalytic activity under direct sunlight irradiation was similar to that under artificial UV irradiation.
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Affiliation(s)
- Laíse M Carvalho
- PPGQ- DQ, Universidade Federal do Piauí-UFPI, Teresina, PI, 64049-550, Brazil
| | | | - Maciel S Lima
- PPGQ-GERATEC-DQ-Universidade Estadual do Piauí, Rua: João Cabral, N. 2231, Teresina, PI, 64002-150, Brazil
| | - João F Cruz-Filho
- PPGQ-GERATEC-DQ-Universidade Estadual do Piauí, Rua: João Cabral, N. 2231, Teresina, PI, 64002-150, Brazil
| | - Taisa C M Dantas
- PPGQ- DQ, Universidade Federal do Piauí-UFPI, Teresina, PI, 64049-550, Brazil
| | - Geraldo E Luz
- PPGQ- DQ, Universidade Federal do Piauí-UFPI, Teresina, PI, 64049-550, Brazil.
- PPGQ-GERATEC-DQ-Universidade Estadual do Piauí, Rua: João Cabral, N. 2231, Teresina, PI, 64002-150, Brazil.
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103
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Ray SK, Hur J. A critical review on modulation of NiMoO 4-based materials for photocatalytic applications. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 278:111562. [PMID: 33126189 DOI: 10.1016/j.jenvman.2020.111562] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Revised: 09/04/2020] [Accepted: 10/22/2020] [Indexed: 06/11/2023]
Abstract
Semiconductor photocatalysis has been widely utilized to solve the problems of energy shortage and environmental pollution. Among the explored photocatalysts, nickel molybdate (NiMoO4) has revealed many advantages for photocatalytic applications, which include visible light absorption, low cost, environment-friendly, large surface area, good electrical conductivities, and tailorable band structure. However, the recombination of photogenerated carriers, which diminishes photocatalytic efficiency, has been held as a major hurdle to the widespread application of this material. To overcome this limitation, various surface modulations such as morphology control, doping of heteroatom, deposition of noble metal nanoparticles, and fabrication of composite structures have been explored in many published studies. This article comprehensively reviews the recent progress in the modulations of NiMoO4-based materials to improve the photocatalytic efficiency. The enhanced photocatalytic capabilities of NiMoO4-based materials are reviewed in terms of such applications as pollutant removal, disinfection of bacteria, and water splitting. The current challenges and possible future direction of research in this field are also highlighted. This comprehensive review is expected to advance the design of highly efficient NiMoO4-based materials for photocatalytic applications.
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Affiliation(s)
- Schindra Kumar Ray
- Department of Environment and Energy, Sejong University, Seoul, 05006, South Korea
| | - Jin Hur
- Department of Environment and Energy, Sejong University, Seoul, 05006, South Korea.
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104
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Khan S, Sohail M, Han C, Khan JA, Khan HM, Dionysiou DD. Degradation of highly chlorinated pesticide, lindane, in water using UV/persulfate: kinetics and mechanism, toxicity evaluation, and synergism by H 2O 2. JOURNAL OF HAZARDOUS MATERIALS 2021; 402:123558. [PMID: 32759000 DOI: 10.1016/j.jhazmat.2020.123558] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/01/2020] [Revised: 07/13/2020] [Accepted: 07/22/2020] [Indexed: 06/11/2023]
Abstract
Sulfate radical-advanced oxidation processes (SR-AOPs) are emerging technologies for decomposing organic pollutants in water. This study investigated the efficiency of UV/persulfate (UV/S2O82-) process to degrade lindane in water, showing 93.2% lindane removal ([lindane]0 = 3.43 μM, [S2O82-]0 = 100 μM) at a UV fluence of 720 mJ/cm2. The lindane degradation followed first order kinetics and mechanistic studies suggested H-abstraction by SO4•- and Cl removal via C-Cl bond cleavage by UV-C light. Toxicity assessment using ECOSAR program showed toxicity gradually decreased and eventually no significant toxicity remained when all by-products vanished at high UV dose. Removal efficiency of lindane decreased from 93.2% to 38.4, 45.5, 56.0, 84.3 and 88.6%, by adding 1.0 mg/L humic acid or 1.0 mM CO32-, HCO3-, Cl- or SO42-, respectively. Coupling of H2O2 with UV/S2O82- showed a significant synergistic effect with 99.0% lindane removal at a UV fluence of 600 mJ/cm2, using [S2O82-]0 = [H2O2]0 = 50 μM while UV/H2O2 resulted in only 36.6% lindane removal ([lindane]0 = 3.43 μM, [H2O2]0 = 100 μM) at a UV fluence of 720 mJ/cm2. The results indicate that SR-AOP has potential for consideration as a remedial technology to treat persistent chlorinated pesticides such as lindane in contaminated water.
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Affiliation(s)
- Sanaullah Khan
- Department of Chemistry, Women University, Swabi, 23430, Pakistan; Radiation Chemistry Laboratory, National Centre of Excellence in Physical Chemistry, University of Peshawar, Peshawar, 25120, Pakistan; Environmental Engineering and Science Program, University of Cincinnati, Cincinnati, Ohio, 45221-0012, USA
| | - M Sohail
- Institute of Chemical Sciences, University of Swat, Swat, 19130, Pakistan
| | - Changseok Han
- Department of Environmental Engineering, INHA University, Incheon, 22212, Republic of Korea
| | - Javed Ali Khan
- Radiation Chemistry Laboratory, National Centre of Excellence in Physical Chemistry, University of Peshawar, Peshawar, 25120, Pakistan
| | - Hasan M Khan
- Radiation Chemistry Laboratory, National Centre of Excellence in Physical Chemistry, University of Peshawar, Peshawar, 25120, Pakistan
| | - Dionysios D Dionysiou
- Environmental Engineering and Science Program, University of Cincinnati, Cincinnati, Ohio, 45221-0012, USA.
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105
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Ao XW, Eloranta J, Huang CH, Santoro D, Sun WJ, Lu ZD, Li C. Peracetic acid-based advanced oxidation processes for decontamination and disinfection of water: A review. WATER RESEARCH 2021; 188:116479. [PMID: 33069949 DOI: 10.1016/j.watres.2020.116479] [Citation(s) in RCA: 160] [Impact Index Per Article: 53.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2020] [Revised: 08/25/2020] [Accepted: 09/27/2020] [Indexed: 06/11/2023]
Abstract
Peracetic acid (PAA) has attracted growing attention as an alternative oxidant and disinfectant in wastewater treatment due to the increased demand to reduce chlorine usage and control disinfection byproducts (DBPs). These applications have stimulated new investigations on PAA-based advanced oxidation processes (AOPs), which can enhance water disinfection and remove micropollutants. The purpose of this review is to conduct a comprehensive analysis of scientific information and experimental data reported in recent years on the applications of PAA-based AOPs for the removal of chemical and microbiological micropollutants from water and wastewater. Various methods of PAA activation, including the supply of external energy and metal/metal-free catalysts, as well as their activation mechanisms are discussed. Then, a review on the usage of PAA-based AOPs for contaminant degradation is given. The degradation mechanisms of organic compounds and the influence of the controlling parameters of PAA-based treatment systems are summarized and discussed. Concurrently, the application of PAA-based AOPs for water disinfection and the related mechanisms of microorganism inactivation are also reviewed. Since combining UV light with PAA is the most commonly investigated PAA-based AOP for simultaneous pathogen inactivation and micropollutant oxidation, we have also focused on PAA microbial inactivation kinetics, together with the effects of key experimental parameters on the process. Moreover, we have discussed the advantages and disadvantages of UV/PAA as an AOP against the well-known and established UV/H2O2. Finally, the knowledge gaps, challenges, and new opportunities for research in this field are discussed. This critical review will facilitate an in-depth understanding of the PAA-based AOPs for water and wastewater treatment and provide useful perspectives for future research and development for PAA-based technologies.
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Affiliation(s)
- Xiu-Wei Ao
- School of Environment, Tsinghua University, Beijing 100084, China
| | - Jussi Eloranta
- Department of Chemistry and Biochemistry, California State University at Northridge, Northridge, CA, 91330, United States
| | - Ching-Hua Huang
- School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | | | - Wen-Jun Sun
- School of Environment, Tsinghua University, Beijing 100084, China.
| | - Ze-Dong Lu
- School of Environment, Tsinghua University, Beijing 100084, China
| | - Chen Li
- School of Environment, Tsinghua University, Beijing 100084, China
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106
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Belousov AS, Suleimanov EV, Fukina DG. Pyrochlore oxides as visible light-responsive photocatalysts. NEW J CHEM 2021. [DOI: 10.1039/d1nj04439g] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
This perspective describes the use of pyrochlore oxides in photocatalysis with focus on the strategies to enhance their activity.
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Affiliation(s)
- Artem S. Belousov
- Lobachevsky State University of Nizhny Novgorod, Research Institute for Chemistry, Gagarin Avenue 23, Nizhny Novgorod, 603950, Russian Federation
| | - Evgeny V. Suleimanov
- Lobachevsky State University of Nizhny Novgorod, Research Institute for Chemistry, Gagarin Avenue 23, Nizhny Novgorod, 603950, Russian Federation
| | - Diana G. Fukina
- Lobachevsky State University of Nizhny Novgorod, Research Institute for Chemistry, Gagarin Avenue 23, Nizhny Novgorod, 603950, Russian Federation
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107
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Akram N, Ma W, Guo J, Guo Y, Yansong Z, Hassan A, Wang J. Synergistic catalysis of Fe3O4/CuO bimetallic catalyst derived from Prussian blue analogues for the efficient decomposition of various organic pollutants. Chem Phys 2021. [DOI: 10.1016/j.chemphys.2020.110974] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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108
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Coumarin-based quantification of hydroxyl radicals and other reactive species generated on excited nitrogen-doped TiO2. J Photochem Photobiol A Chem 2021. [DOI: 10.1016/j.jphotochem.2020.112913] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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109
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Microwave-Assisted Synthesis and Characterization of Solar-Light-Active Copper–Vanadium Oxide: Evaluation of Antialgal and Dye Degradation Activity. Catalysts 2020. [DOI: 10.3390/catal11010036] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
In this work, solar-light-active copper–vanadium oxide (Cu-VO) was synthesized by a simple microwave method and characterized by FESEM, EDS, XRD, XPS, UV–Vis/near-infrared (NIR), and FT-IR spectroscopy. Antialgal and dye degradation activities of Cu-VO were investigated against Microcystis aeruginosa and methylene blue dye (MB), respectively. The mechanism of action of Cu-VO was examined regarding the production of hydroxyl radical (·OH) in the medium and intracellular reactive oxygen species (ROS) in M. aeruginosa. FESEM and XRD analyses of Cu-VO disclosed the formation of monoclinic crystals with an average diameter of 132 nm. EDX and XPS analyses showed the presence of Cu, V, and O atoms on the surface of Cu-VO. Furthermore, FT-IR analysis of Cu-VO exposed the presence of tetrahedral VO4 and octahedral CuO6. Cu-VO effectively reduced the algal growth and degraded methylene blue under solar light. A total of 4 mg/L of Cu-VO was found to be effective for antialgal activity. Cu-VO degraded 93% of MB. The investigation of the mechanism of action of Cu-VO showed that ·OH mediated antialgal and dye degradation of M. aeruginosa and MB. Cu-VO also triggered the production of intracellular ROS in M. aeruginosa, leading to cell death. Thus, Cu-VO could be an effective catalyst for wastewater treatment.
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110
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Ghafoori S, Nasirian M, Al-Jamal R, Mallouh FA, Mehrvar M. Statistical parameter optimization and modeling of photodegradation of methyl orange using a composite photocatalyst prepared by thermal synthesis. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:45650-45660. [PMID: 32803605 DOI: 10.1007/s11356-020-10301-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Accepted: 07/27/2020] [Indexed: 06/11/2023]
Abstract
Doping a transition metal into photocatalysts enhances the photocatalytic activity drastically. In the first part of this study, Taguchi design of experiment is applied to evaluate and optimize the efficiency of the Fe2O3/TiO2 photocatalyst synthetized by thermal method assisted by UV radiation. The contribution percentages of Fe:TiO2 mass ratio, Fe2O3/TiO2 dosage, and pH on the total organic carbon (TOC) removal are determined using analysis of variance (ANOVA). In the second part of this study, in order to model the photocatalytic degradation process, the optical properties of the photocatalyst, including the extinction, absorption, and scattering coefficients, are determined. Subsequently, the radiation transfer equation (RTE) is solved numerically based on the surface emission model using the discrete ordinate method. Furthermore, a rigorous model, including chemical reaction rates, radiation transfer, and mass transfer is proposed and validated by a set of experimental data. A satisfactory correlation between the predicted and experimental data with less than 5% error confirms the reliability of the model. The intrinsic kinetic parameters are also determined by comparing predicted values to those of the experimental results by applying non-linear regressions.
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Affiliation(s)
- Samira Ghafoori
- Department of Chemical Engineering, Ryerson University, 350 Victoria Street, Toronto, ON, M5B 2K3, Canada
- Department of Petroleum Engineering, Australian College of Kuwait, P.O. Box 1411, 13015, Safat, Kuwait
| | - Mohsen Nasirian
- Department of Chemical Engineering, Ryerson University, 350 Victoria Street, Toronto, ON, M5B 2K3, Canada
| | - Rasha Al-Jamal
- Department of Mathematics, Australian College of Kuwait, P.O. Box 1411, 13015, Safat, Kuwait
| | - Fahad Abu Mallouh
- Department of Petroleum Engineering, Australian College of Kuwait, P.O. Box 1411, 13015, Safat, Kuwait
| | - Mehrab Mehrvar
- Department of Chemical Engineering, Ryerson University, 350 Victoria Street, Toronto, ON, M5B 2K3, Canada.
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111
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Souza DR, Neves JVS, França YKS, Malheiro WC. TiO 2 Synthesis by the Pechini's Method and Application for Diclofenac Photodegradation †. Photochem Photobiol 2020; 97:32-39. [PMID: 33174219 DOI: 10.1111/php.13355] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 11/03/2020] [Accepted: 11/04/2020] [Indexed: 11/28/2022]
Abstract
In this work, the effect of the calcination temperature on the TiO2 synthesis using Pechini's method was reported. The adopted calcination temperatures were 500, 600, and 700°C. XRD measurements indicated the composition of crystalline phases, and from there, the conversion of the anatase phase to rutile. TiO2 Evonik® was used as a reference standard and sodium diclofenac as a standard for photodegradation assessment. The average crystalline size increased. In both cases, this trend accompanied the increase in calcination temperature. The optical properties were performed using diffuse UV-Vis reflectance. Results obtained indicated maximum absorption wavelength values more intense and displaced to the visible region. Also, the estimated band gap energy values decreased. The photocatalytic performance of TiO2 samples was superior to the reference catalyst (TiO2 Evonik® ). Especially in the first 10 minutes, the comparative photodegradation was up to approximately 58% higher. The photodegradation kinetic constants were also higher, and by comparison, up to approximately 73% higher. Toxicity measurements, using Artemias salina, also indicated similar decay behavior in the first 10 minutes, with a performance of up to approximately 60%.
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Affiliation(s)
- Danilo R Souza
- Center for Exact Sciences and Technologies, Federal University Western Bahia, Barreiras, Brazil
| | - João Vitor S Neves
- Center for Exact Sciences and Technologies, Federal University Western Bahia, Barreiras, Brazil
| | - Yago K S França
- Center for Exact Sciences and Technologies, Federal University Western Bahia, Barreiras, Brazil
| | - Wellington C Malheiro
- Center for Exact Sciences and Technologies, Federal University Western Bahia, Barreiras, Brazil
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112
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Asli SA, Taghizadeh M. Sonophotocatalytic Degradation of Pollutants by ZnO‐Based Catalysts: A Review. ChemistrySelect 2020. [DOI: 10.1002/slct.202003612] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Sahebeh Alizadeh Asli
- Chemical Engineering Department Babol Noshirvani University of Technology Babol Iran
| | - Majid Taghizadeh
- Chemical Engineering Department Babol Noshirvani University of Technology Babol Iran
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113
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Salvadores F, Reli M, Alfano OM, Kočí K, Ballari MDLM. Efficiencies Evaluation of Photocatalytic Paints Under Indoor and Outdoor Air Conditions. Front Chem 2020; 8:551710. [PMID: 33195045 PMCID: PMC7650231 DOI: 10.3389/fchem.2020.551710] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Accepted: 09/09/2020] [Indexed: 11/24/2022] Open
Abstract
The removal of indoor and outdoor air pollutants is crucial to prevent environmental and health issues. Photocatalytic building materials are an energy-sustainable technology that can completely oxidize pollutants, improving in situ the air quality of contaminated sites. In this work, different photoactive TiO2 catalysts (anatase or modified anatase) and amounts were used to formulate photocatalytic paints in replacement of the normally used TiO2 (rutile) pigment. These paints were tested in two different experimental systems simulating indoor and outdoor environments. In one, indoor illumination conditions were used in the photoreactor for the oxidation of acetaldehyde achieving conversions between 37 and 55%. The other sets of experiments were performed under simulated outdoor radiation for the degradation of nitric oxide, resulting in conversions between 13 and 35%. This wide range of conversions made it difficult to directly compare the paints. Thus, absorption, photonic, and quantum efficiencies were calculated to account for the paints photocatalytic performance. It was found that the formulations containing carbon-doped TiO2 presented the best efficiencies. The paint with the maximum amount of this photocatalyst showed the highest absorption and photonic efficiencies. On the other hand, the paint with the lowest amount of carbon-doped TiO2 presented the highest value of quantum efficiency, thus becoming the optimal formulation in terms of energy use.
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Affiliation(s)
- Federico Salvadores
- Instituto de Desarrollo Tecnológico para la Industria Química (Universidad Nacional del Litoral and Consejo Nacional de Investigaciones Científicas y Técnicas), Santa Fe, Argentina
| | - Martin Reli
- Institute of Environmental Technology, Vysoká Škola Báňská-Technical University of Ostrava, Ostrava, Czechia
| | - Orlando M Alfano
- Instituto de Desarrollo Tecnológico para la Industria Química (Universidad Nacional del Litoral and Consejo Nacional de Investigaciones Científicas y Técnicas), Santa Fe, Argentina
| | - Kamila Kočí
- Institute of Environmental Technology, Vysoká Škola Báňská-Technical University of Ostrava, Ostrava, Czechia
| | - María de Los Milagros Ballari
- Instituto de Desarrollo Tecnológico para la Industria Química (Universidad Nacional del Litoral and Consejo Nacional de Investigaciones Científicas y Técnicas), Santa Fe, Argentina
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114
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He X, Wang A, Wu P, Tang S, Zhang Y, Li L, Ding P. Photocatalytic degradation of microcystin-LR by modified TiO 2 photocatalysis: A review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 743:140694. [PMID: 32673915 DOI: 10.1016/j.scitotenv.2020.140694] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Revised: 06/30/2020] [Accepted: 06/30/2020] [Indexed: 05/23/2023]
Abstract
Microcystin-LR (MC-LR), the most toxic and commonly encountered cyanotoxin, is produced by harmful cyanobacterial blooms and potentially threatens human and ecosystems health. Titanium dioxide (TiO2) photocatalysis is attracting growing attention and has been considered as an efficient, environmentally friendly and promising solution to eliminate MC-LR in the aquatic ecosystems. Over recent decades, scientific efforts have been directed towards the understanding of fundamentals, modification strategies, and application potentials of TiO2 photocatalysis in degrading MC-LR. In this article, recent reports have been reviewed and progress has been summarized in the development of heterogeneous TiO2-based photocatalysts for MC-LR photodegradation under visible, UV, or solar light. The proposed photocatalytic principles of TiO2 and destruction of MC-LR have been thoroughly discussed. Specifically, some main modification methods for improving the drawbacks and performance of TiO2 nanoparticle were highlighted, including element doping, semiconductor coupling, immobilization, floatability amelioration and magnetic separation. Moreover, the performance evaluation metrics quantum yield (QY) and figure of merit (FOM) were used to compare different photocatalysts in MC-LR degradation. The best performance was seen in N-TiO2 with QY and FOM values of 2.20E-07 molecules/photon and 1.00E-11 mol·L/(g·J·h). N-TiO2 or N-TiO2-based materials may be excellent options for photocatalyst design in terms of MC-LR degradation. Finally, a summary of the remaining challenges and perspectives on new tendencies in this exciting frontier and still an emerging area of research were addressed accordingly. Overall, the present review will offer a deep insight for understanding the photodegradation of MC-LR with modified TiO2 to further inspire researchers that work in associated fields.
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Affiliation(s)
- Xinghou He
- Central South University Xiangya School of Public Health, Changsha, Hunan 410078, China
| | - Anzhi Wang
- University School of South China Hengyang Medical School, Hengyang, Hunan 421001, China
| | - Pian Wu
- Central South University Xiangya School of Public Health, Changsha, Hunan 410078, China
| | - Shibiao Tang
- Central South University School of Minerals Processing and Bioengineering, Changsha, Hunan 410083, China
| | - Yong Zhang
- Central South University Xiangya School of Public Health, Changsha, Hunan 410078, China
| | - Lei Li
- Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing, Jiangsu 211166, China
| | - Ping Ding
- Central South University Xiangya School of Public Health, Changsha, Hunan 410078, China.
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115
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Visible Light Photocatalyst Anatase Phased TiO2 Nanoparticles for Enhanced Antibacterial Performance. J CLUST SCI 2020. [DOI: 10.1007/s10876-020-01939-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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116
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Peng X, Wang M, Dai H, Qiu F, Hu F. In situ growth of carbon nitride on titanium dioxide/hemp stem biochar toward 2D heterostructured photocatalysts for highly photocatalytic activity. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:39198-39210. [PMID: 32638312 DOI: 10.1007/s11356-020-09381-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2020] [Accepted: 05/19/2020] [Indexed: 06/11/2023]
Abstract
In this work, hierarchical structure TiO2/hemp stem biochar carbon (HSBC) and C3N4-TiO2/HSBC were successfully fabricated, which were used as efficient visible-light photocatalyst degradation for ammonia nitrogen from aqueous solution. The as-prepared C3N4-TiO2/HSBC hybrid catalyst showed the higher efficient photocatalytic activity for decomposition of ammonia nitrogen than those of pure TiO2 and TiO2/HSBC, suggesting suppressed recombination of photogenerated charges and promoted mass transfer due to synergistic effect, and thus increased photocatalytic degradation activity. The degradation of ammonia follows a pseudo-first-order kinetics. All prepared catalysts demonstrated extremely photocatalytic efficiency under visible-light and UV light illumination; the ammonia nitrogen photocatalytic degradation activity of C3N4-TiO2/HSBC can reach 90.3% under UV light while the degradation activity achieved about 50.7% under visible-light irradiation. The results revealed that the h+ was dominantly active intermediates in the process of photocatalytic degradation. The prepared catalysts are promising for the degradation of ammonia nitrogen from water resource.
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Affiliation(s)
- Xiaoming Peng
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, 212013, Jiangsu Province, China
- School of Civil Engineering and Architecture, East China Jiaotong University, Nanchang, 330013, Jiangxi Province, China
| | - Min Wang
- School of Civil Engineering and Architecture, East China Jiaotong University, Nanchang, 330013, Jiangxi Province, China
| | - Hongling Dai
- School of Civil Engineering and Architecture, East China Jiaotong University, Nanchang, 330013, Jiangxi Province, China
| | - Fengxian Qiu
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, 212013, Jiangsu Province, China
| | - Fengping Hu
- School of Civil Engineering and Architecture, East China Jiaotong University, Nanchang, 330013, Jiangxi Province, China.
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Sang NX, Minh VC. Thermal annealing-induced self-junction of hydrothermal titanate nanotubes/TiO 2 nanoparticles with enhanced photocatalytic activity. NANOTECHNOLOGY 2020; 31:435703. [PMID: 32668424 DOI: 10.1088/1361-6528/aba65c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
This work investigates the effect of thermal annealing on the crystalline structure and optical properties of hydrothermal titanate nanotubes (TNTs). It shows that subjecting TNTs to air at 400 °C can be used to form a junction between TNTs and TiO2 nanoparticles. Furthermore, the TNT microstructure is transformed from monoclinic to anatase phase by the annealing process. As a result of the self-junction formation, the visible photocatalytic activity in the degradation of methylene blue is enhanced in the thermal annealed sample in which the pseudo-first-order model fits well with the kinetic reaction rates of the TNTs and thermal TNTs with values of 0.0034 and 0.0082 min-1, respectively. Insights into the improvement in photocatalytic activity are revealed by ultraviolet-visible diffuse reflectance and photoluminescence emission spectroscopies.
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Affiliation(s)
- Nguyen Xuan Sang
- Department of Electronics and Telecommunication, Saigon University, 273 An Duong Vuong, ward 3, district 5, Ho Chi Minh city 700000, Vietnam
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118
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Xu C, Bao M, Ren J, Zhang Z. NH 2-MIL-88B (Fe α In 1-α ) mixed-MOFs designed for enhancing photocatalytic Cr(vi) reduction and tetracycline elimination. RSC Adv 2020; 10:39080-39086. [PMID: 35518441 PMCID: PMC9057341 DOI: 10.1039/d0ra07487j] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Accepted: 10/18/2020] [Indexed: 01/14/2023] Open
Abstract
Aiming at solving the issue of wastewater purification, this work synthesized NH2-MIL-88B (FeαIn1−α) photocatalysts by a simple one-pot method, which was employed for photocatalytic reduction of Cr(vi) and oxidation of TC-HCl. Compared with traditional NH2-MIL-88B (Fe) photocatalysts, NH2-MIL-88B (Fe0.6In0.4) displayed excellent photocatalytic performance; the photocatalytic redox rate for Cr(vi) and TC-HCl reached 86.83% and 72.05%, respectively. The good photocatalytic performance might be attributed to the metal-to-metal charge transition (MMCT) between Fe–O clusters and In–O clusters formed by doping In(iii) into NH2-MIL-88B (Fe), which provides effective active sites for the photocatalytic reduction and oxidation routes. Besides, the synergistic effect of the ligand-to-metal charge transition (LMCT) and MMCT expands the separation and transfer of photogenerated carriers and inhibits the recombination of electron–hole pairs, thus effectively improving the photocatalytic performance. Therefore, this work could provide a new method for the construction of mixed metal MOFs for the photocatalytic degradation of pollutants. Aiming at solving the issue of wastewater purification, this work synthesized NH2-MIL-88B (FeαIn1−α) photocatalysts by a simple one-pot method, which was employed for photocatalytic reduction of Cr(vi) and oxidation of TC-HCl.![]()
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Affiliation(s)
- Chunhua Xu
- Dalian Vocational & Technical College (Dalian Radio and TV University) Dalian 116035 PR China +86 411-62614316
| | - Mingjun Bao
- School of Chemistry and Chemical Engineering, Liaoning Normal University Dalian 116029 PR China +86 411-82158309
| | - Jiawen Ren
- School of Chemistry and Chemical Engineering, Liaoning Normal University Dalian 116029 PR China +86 411-82158309
| | - Zhiguang Zhang
- School of Chemistry and Chemical Engineering, Liaoning Normal University Dalian 116029 PR China +86 411-82158309
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119
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Han B, Yu S, Zhao D, Lou Y, Gao J, Liu Z, Wang Z, Qian G. Hyper oxygen incorporation in CeF 3: a new intermediate-band photocatalyst for antibiotic degradation under visible/NIR light. RSC Adv 2020; 10:38798-38804. [PMID: 35518405 PMCID: PMC9057384 DOI: 10.1039/d0ra06107g] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Accepted: 09/22/2020] [Indexed: 11/23/2022] Open
Abstract
Intermediate-band semiconductors perform functions similar to natural photosynthesis by combining two photons to achieve a higher electron excitation. In this study, a strategy was developed to prepare a high oxygen-doped CeF3 (CeF3-O) nanomaterial that exhibits photocatalytic activity under visible/NIR light for the first time. The homogeneous doping oxygen atoms were verified to efficiently modify the band structure of CeF3. DFT calculation predicted the formation of an intermediate band within CeF3 upon homogeneous doping of O at interstitial sites. The interaction between F and O atoms generates an intermediate band, which divides the total bandgap of CeF3-O into two sub-bandgaps at about 1.7 eV and 2.9 eV, enabling CeF3-O photocatalysis under visible light and NIR light. Reflectance spectra evidenced that the same bandgaps exist. The photocatalytic activities of CeF3-O were tested by wavelength-controlled light. The rate constants of TC-HCl photodegrading under visible/NIR light are 12.85 × 10−3 min−1 and 1.28 × 10−3 min−1, respectively. The two-step electron transfer was also obviously confirmed in visible-light photocatalysis. In conclusion, the high oxygen doping builds a more applicable band structure of CeF3-O for photocatalytic performance, charge transfer and special light response for visible/NIR light. Hyper doping O acts as a nonradiative center and generates an intermediate band with F atoms, exhibiting efficient photocatalysis activities under visible/NIR light.![]()
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Affiliation(s)
- Bing Han
- State Key Laboratory of Silicon Materials, Department of Materials Science and Engineering, Zhejiang University Hangzhou 310027 China
| | - Siqi Yu
- State Key Laboratory of Silicon Materials, Department of Materials Science and Engineering, Zhejiang University Hangzhou 310027 China
| | - Dian Zhao
- State Key Laboratory of Silicon Materials, Department of Materials Science and Engineering, Zhejiang University Hangzhou 310027 China .,Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Life Sciences, Zhejiang Normal University Jinhua 321004 China
| | - Yunchao Lou
- State Key Laboratory of Silicon Materials, Department of Materials Science and Engineering, Zhejiang University Hangzhou 310027 China
| | - Jiayang Gao
- State Key Laboratory of Silicon Materials, Department of Materials Science and Engineering, Zhejiang University Hangzhou 310027 China
| | - Zhe Liu
- State Key Laboratory of Silicon Materials, Department of Materials Science and Engineering, Zhejiang University Hangzhou 310027 China
| | - Zhiyu Wang
- State Key Laboratory of Silicon Materials, Department of Materials Science and Engineering, Zhejiang University Hangzhou 310027 China
| | - Guodong Qian
- State Key Laboratory of Silicon Materials, Department of Materials Science and Engineering, Zhejiang University Hangzhou 310027 China
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120
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Activation Treatments and SiO2/Pd Modification of Sol–Gel TiO2 Photocatalysts for Enhanced Photoactivity under UV Radiation. Catalysts 2020. [DOI: 10.3390/catal10101184] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
The objective of this work is to improve the efficiency of TiO2 photocatalysts by activation treatments and by modification with palladium nanoparticles and doping with SiO2. The influence of the additive loading was explored, and two activation treatments were performed: UV exposition and H2 reduction. TiO2/SiO2/Pd photocatalysts were synthesized by an original cogelation method: a modified silicon alkoxide, i.e., [3-(2-aminoethyl)aminopropyl]trimethoxysilane (EDAS), was used to complex the palladium ions, thanks to the ethylenediamine group, while the alkoxide groups reacted with TiO2 precursors. Pure TiO2 was also synthesized by the sol–gel process for comparison. X-ray diffraction evidenced that the crystallographic structure of TiO2 was anatase and that Pd was present, either in its oxidized form after calcination, or in its reduced form after reduction. The specific surface area of the samples varied from 5 to 145 m2 g-1. Transmission electron microscopy allowed us to observe the homogeneous dispersion and nanometric size of Pd particles in the reduced samples. The width of the band gap for pure TiO2 sample, measured by UV/Visible diffuse reflectance spectroscopy at approximately 3.2 eV, corresponded to that of anatase. The band gap for the TiO2/SiO2/Pd composite samples could not be calculated, due to their high absorption in visible range. The photocatalytic activity of the various catalysts was evaluated by the degradation of a methylene blue solution under UV radiation. The results showed that the photocatalytic activity of the catalysts was inversely proportional to the content of silica present in the matrix. A small amount of silica improved the photocatalytic activity, as compared to the pure TiO2 sample. By contrast, a high amount of silica delayed the crystallization of TiO2 in its anatase form. The activation treatment under UV had little influence on photocatalytic efficiency. The introduction of Pd species increased the photocatalytic activity of the samples because it allowed for a decrease in the rate of electron–hole recombinations in TiO2. The reduction treatment improved the activity of photocatalysts, whatever the palladium content, thanks to the reduction of Ti4+ into Ti3+, and the formation of defects in the crystallographic structure of anatase.
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Chan YY, Pang YL, Lim S, Lai CW, Abdullah AZ, Chong WC. Biosynthesized Fe- and Ag-doped ZnO nanoparticles using aqueous extract of Clitoria ternatea Linn for enhancement of sonocatalytic degradation of Congo red. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:34675-34691. [PMID: 31628641 DOI: 10.1007/s11356-019-06583-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Accepted: 09/23/2019] [Indexed: 06/10/2023]
Abstract
Nowadays, the current synthesis techniques used in industrial production of nanoparticles have been generally regarded as nonenvironmentally friendly. Consequently, the biosynthesis approach has been proposed as an alternative to reduce the usage of hazardous chemical compounds and harsh reaction conditions in the production of nanoparticles. In this work, pure, iron (Fe)-doped and silver (Ag)-doped zinc oxide (ZnO) nanoparticles were successfully synthesized through the green route using Clitoria ternatea Linn. The optical, chemical, and physical properties of the biosynthesized ZnO nanoparticles were then analyzed by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), energy-dispersive X-ray spectroscopy (EDX), UV-Vis diffuse reflectance spectroscopy (DRS), zeta potential measurement, Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), and surface analysis. The biosynthesized ZnO nanoparticles were crystallized with a hexagonal wurtzite structure and possessed smaller particle sizes than those of commercially or chemically produced samples. The existence of biomolecules to act as reducing and stabilizing agents from C. ternatea Linn aqueous extract was confirmed using FTIR analysis. The biosynthesized ZnO nanoparticles mainly comprised of negatively charged groups and responsible for moderately stable dispersion of the nanoparticles. All these properties were favorable for the sonocatalytic degradation of Congo red. Sonocatalytic activity of ZnO nanoparticles was studied through the degradation of 10 mg/L Congo red using ultrasonic irradiation at 45 kHz and 80 W. The results showed that the sonocatalytic degradation efficiency of Congo red in the presence of biosynthesized ZnO nanoparticles prepared at 50 °C for 1 h could achieve 88.76% after 1 h. The sonocatalytic degradation efficiency of Congo red in the presence of Ag-doped ZnO was accelerated to 94.42% after 10 min which might be related to the smallest band gap energy (3.02 eV) and the highest specific surface area (10.31 m2/g) as well as pore volume (0.0781 cm3/g). Lastly, the biosynthesized ZnO nanoparticles especially Ag-doped ZnO offered significant antibacterial potential against Escherichia coli which indicated its ability to inhibit the normal growth and replication of bacterial cells. These results affirmed that the biosynthesized ZnO nanoparticles could be used as an alternative to the current chemical compounds and showed a superior sonocatalytic activity toward degradation of Congo red.
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Affiliation(s)
- Yin Yin Chan
- Department of Chemical Engineering, Lee Kong Chian Faculty of Engineering and Science, Universiti Tunku Abdul Rahman, 43000, Kajang, Selangor, Malaysia
| | - Yean Ling Pang
- Department of Chemical Engineering, Lee Kong Chian Faculty of Engineering and Science, Universiti Tunku Abdul Rahman, 43000, Kajang, Selangor, Malaysia.
| | - Steven Lim
- Department of Chemical Engineering, Lee Kong Chian Faculty of Engineering and Science, Universiti Tunku Abdul Rahman, 43000, Kajang, Selangor, Malaysia
| | - Chin Wei Lai
- Nanotechnology & Catalysis Research Centre (NANOCAT), Institute of Graduate Studies Building, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - Ahmad Zuhairi Abdullah
- School of Chemical Engineering, Universiti Sains Malaysia, Nibong Tebal, 14300, Penang, Malaysia
| | - Woon Chan Chong
- Department of Chemical Engineering, Lee Kong Chian Faculty of Engineering and Science, Universiti Tunku Abdul Rahman, 43000, Kajang, Selangor, Malaysia
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122
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Improved photoelectrocatalytic activity of anodic TiO2 nanotubes by boron in situ doping coupled with geometrical optimization: Application of a potent photoanode in the purification of dye wastewater. J Solid State Electrochem 2020. [DOI: 10.1007/s10008-020-04825-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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123
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Paramo LA, Feregrino-Pérez AA, Guevara R, Mendoza S, Esquivel K. Nanoparticles in Agroindustry: Applications, Toxicity, Challenges, and Trends. NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:E1654. [PMID: 32842495 PMCID: PMC7558820 DOI: 10.3390/nano10091654] [Citation(s) in RCA: 79] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Revised: 08/21/2020] [Accepted: 08/21/2020] [Indexed: 12/22/2022]
Abstract
Nanotechnology is a tool that in the last decade has demonstrated multiple applications in several sectors, including agroindustry. There has been an advance in the development of nanoparticulated systems to be used as fertilizers, pesticides, herbicides, sensors, and quality stimulants, among other applications. The nanoencapsulation process not only protects the active ingredient but also can affect the diffusion, interaction, and activity. It is important to evaluate the negative aspects of the use of nanoparticles (NPs) in agriculture. Given the high impact of the nanoparticulated systems in the agro-industrial field, this review aims to address the effects of various nanomaterials on the morphology, metabolomics, and genetic modification of several crops.
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Affiliation(s)
- Luis A. Paramo
- Graduate and Research Division, Engineering Faculty, Universidad Autónoma de Querétaro, Cerro de las campanas, C.P. 76010, Santiago de Querétaro, Qro., Mexico; (L.A.P.); (A.A.F.-P.); (R.G.)
| | - Ana A. Feregrino-Pérez
- Graduate and Research Division, Engineering Faculty, Universidad Autónoma de Querétaro, Cerro de las campanas, C.P. 76010, Santiago de Querétaro, Qro., Mexico; (L.A.P.); (A.A.F.-P.); (R.G.)
| | - Ramón Guevara
- Graduate and Research Division, Engineering Faculty, Universidad Autónoma de Querétaro, Cerro de las campanas, C.P. 76010, Santiago de Querétaro, Qro., Mexico; (L.A.P.); (A.A.F.-P.); (R.G.)
| | - Sandra Mendoza
- Programa de Posgrado en Alimentos del Centro de la República (PROPAC), Research and Graduate Studies in Food Science, Chemistry Faculty, Universidad Autónoma de Querétaro, Cerro de las Campanas, C.P. 76010, Santiago de Querétaro, Qro., Mexico;
| | - Karen Esquivel
- Graduate and Research Division, Engineering Faculty, Universidad Autónoma de Querétaro, Cerro de las campanas, C.P. 76010, Santiago de Querétaro, Qro., Mexico; (L.A.P.); (A.A.F.-P.); (R.G.)
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124
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Long Z, Li Q, Wei T, Zhang G, Ren Z. Historical development and prospects of photocatalysts for pollutant removal in water. JOURNAL OF HAZARDOUS MATERIALS 2020; 395:122599. [PMID: 32302881 DOI: 10.1016/j.jhazmat.2020.122599] [Citation(s) in RCA: 101] [Impact Index Per Article: 25.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Revised: 03/25/2020] [Accepted: 03/26/2020] [Indexed: 05/21/2023]
Abstract
Photocatalysis, as a low-cost and environment friendly technology, has demonstrated a significant potential for water pollution purification; it has received extensive attention in recent decades. The key is the photocatalyst; a large number of photocatalysts have been developed. To better understand and further develop the photocatalysis technology for water treatment, this review summarizes its development over time. The development period is divided into four stages (1960s-1993, 1994-2000, 2001-2010, and 2011-present) to provide readers with a better understanding of the development characteristics, and causes and consequences of each historical stage. This review expounds the origin and development of photocatalysis and the obstacles encountered and overcome. It describes the development of mechanisms and methods to solve these problems in each time period. Moreover, it reviews the recent development of new photocatalysts, the concept of designing photocatalysts, and photocatalytic-coupling systems. Finally, it enumerates the problems that continue to exist in the application of photocatalysis technology, and highlights the key issues that must be addressed in future research. The review is aimed at providing the researchers with a deeper understanding of photocatalysis technology and encourage further development of the application of photocatalysis to water treatment.
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Affiliation(s)
- Zeqing Long
- School of Energy & Environmental Engineering, Hebei University of Technology, Tianjin, 300130, China; School of Environment & Natural Resources, Renmin University of China, Beijing, 100872, China.
| | - Qiangang Li
- School of Environment & Natural Resources, Renmin University of China, Beijing, 100872, China.
| | - Ting Wei
- School of Environment & Natural Resources, Renmin University of China, Beijing, 100872, China.
| | - Guangming Zhang
- School of Energy & Environmental Engineering, Hebei University of Technology, Tianjin, 300130, China; School of Environment & Natural Resources, Renmin University of China, Beijing, 100872, China.
| | - Zhijun Ren
- School of Energy & Environmental Engineering, Hebei University of Technology, Tianjin, 300130, China.
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125
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Sabeeh M, Liaquat R, Maryam A. Effect of alkaline and alkaline-photocatalytic pretreatment on characteristics and biogas production of rice straw. BIORESOURCE TECHNOLOGY 2020; 309:123449. [PMID: 32361618 DOI: 10.1016/j.biortech.2020.123449] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2020] [Revised: 04/22/2020] [Accepted: 04/25/2020] [Indexed: 06/11/2023]
Abstract
To overcome recalcitrant nature and investigate enhancement of biogas production of rice straw (RS), it was subjected to pretreatment under mild conditions. Alkaline pretreatment using sodium hydroxide (NaOH), photocatalytic pretreatment utilizing titania nanoparticles (TiO2 NPs) and alkaline-photocatalytic pretreatment was used to disrupt the lignocellulose complex. As compared to raw RS, maximum biogas and methane enhancement due to alkaline pretreatment was observed for 1.5% w/v NaOH pretreated RS which was 50 and 71% respectively. Photocatalytic pretreatment of RS at 0.25 g/L TiO2 increased biogas and methane yield by 30 and 36% respectively. However, maximum biogas and methane enhancement was observed for alkaline-photocatalytic pretreatment at 1.5% w/v NaOH-0.25 g/L TiO2 which was 74 and 122% respectively. Comparatively high enhancements were observed during alkaline-photocatalytic combined pretreatment due to increased cellulose and decreased lignin content. Moreover, the experimental data obtained from the experiments were validated using a non-linear kinetic model.
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Affiliation(s)
- Mariam Sabeeh
- Institute of Environmental Sciences and Engineering (IESE), School of Civil and Environmental Engineering (SCEE), National University of Sciences and Technology (NUST), Islamabad 44000, Pakistan
| | - Rabia Liaquat
- US Pakistan Centre for Advanced Studies in Energy (USPCAS-E), National University of Sciences and Technology (NUST), Islamabad 44000, Pakistan.
| | - Ayesha Maryam
- Institute of Environmental Sciences and Engineering (IESE), School of Civil and Environmental Engineering (SCEE), National University of Sciences and Technology (NUST), Islamabad 44000, Pakistan
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126
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Controllable construction of hierarchical TiO2 supported on hollow rGO/P-HC heterostructure for highly efficient photocatalysis. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.124831] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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127
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Abstract
In this study, we attempted to synthesize visible light active nano-sized photocatalysts using metal oxides such as zinc oxide, zirconium oxide, tungsten oxide, and strontium titanium oxide with (MoCl5)2 as a dopant by the simple ball-milling method. Fourier-transform infrared spectroscopy data confirmed the presence of M-O-Mo linkage (M = Zn, Zr, W, and SrTi) in all the molybdenum-doped metal oxides (MoMOs), but only MoZnO inhibited the growth of the bloom-forming Microcystis aeruginosa under visible light in a concentration-dependent manner up to 10 mg/L. Further, structural characterization of MoZnO using FESEM and XRD exhibited the formation of typical hexagonal wurtzite nanocrystals of approximately 4 nm. Hydroxyl radical (·OH), reactive oxygen species (ROS), and lipid peroxidation assays revealed ·OH generated by MoZnO under the visible light seemed to cause peroxidation of the lipid membrane of M. aeruginosa, which led to an upsurge of intracellular ROS and consequently introduced the agglomeration of cyanobacteria. These results demonstrated that nano-sized MoZnO photocatalyst can be easily synthesized in a cost-effective ball-mill method and utilized for biological applications such as the reduction of harmful algal blooms. Further, our study implies that a simple ball-milling method can provide an easy, green, and scalable route for the synthesis of visible light active doped metal oxides.
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128
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Fast Microwave Synthesis of Gold-Doped TiO2 Assisted by Modified Cyclodextrins for Photocatalytic Degradation of Dye and Hydrogen Production. Catalysts 2020. [DOI: 10.3390/catal10070801] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
A convenient and fast microwave synthesis of gold-doped titanium dioxide materials was developed with the aid of commercially available and common cyclodextrin derivatives, acting both as reducing and stabilizing agents. Anatase titanium oxide was synthesized from titanium chloride by microwave heating without calcination. Then, the resulting titanium oxide was decorated by gold nanoparticles thanks to a microwave-assisted reduction of HAuCl4 by cyclodextrin in alkaline conditions. The materials were fully characterized by UV-Vis spectroscopy, X-Ray Diffraction (XRD), Transmission Electron Microscopy (TEM), and N2 adsorption-desorption measurements, while the metal content was determined by Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES). The efficiency of the TiO2@Au materials was evaluated with respect to two different photocatalytic reactions, such as dye degradation and hydrogen evolution from water.
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129
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Belekbir S, El Azzouzi M, El Hamidi A, Rodríguez-Lorenzo L, Santaballa JA, Canle M. Improved Photocatalyzed Degradation of Phenol, as a Model Pollutant, over Metal-Impregnated Nanosized TiO 2. NANOMATERIALS 2020; 10:nano10050996. [PMID: 32455949 PMCID: PMC7279559 DOI: 10.3390/nano10050996] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Revised: 05/10/2020] [Accepted: 05/18/2020] [Indexed: 11/28/2022]
Abstract
Photocatalyzed degradation of phenol in aqueous solution over surface impregnated TiO2 (M = Cu, Cr, V) under UV-Vis (366 nm) and UV (254 nm) irradiation is described. Nanosized photocatalyts were prepared from TiO2-P25 by wet impregnation, and characterized by X-ray diffraction, X-ray fluorescence, transmission electron microscopy, UV-Vis diffuse reflectance spectroscopy, Raman spectroscopy, and adsorption studies. No oxide phases of the metal dopants were found, although their presence in the TiO2-P25 lattice induces tensile strain in Cu-impregnated TiO2-P25, whereas compressive strain in Cr- and V-impregnated TiO2-P25. Experimental evidences support chemical and mechanical stability of the photocatalysts. Type IV N2 adsorption–desorption isotherms, with a small H3 loop near the maximum relative pressure were observed. Metal surface impregnated photocatalysts are mesoporous with a similar surface roughness, and a narrow pore distribution around ca. 25 Å. They were chemically stable, showing no metal lixiviation. Their photocatalytic activity was followed by UV-Vis spectroscopy and HPLC–UV. A first order kinetic model appropriately fitted the experimental data. The fastest phenol degradation was obtained with M (0.1%)/TiO2-P25, the reactivity order being Cu > V >> Cr > TiO2-P25 under 366 nm irradiation, while TiO2-P25 > Cu > V > Cr, when using 254 nm radiation. TOC removal under 366 nm irradiation for 300 min showed almost quantitative mineralization for all tested materials, while 254 nm irradiation for 60 min led to maximal TOC removal (ca. 30%). Photoproducts and intermediate photoproducts were identified by HPLC–MS, and appropriate reaction pathways are proposed. The energy efficiency of the process was analysed, showing UV lamps are superior to UVA lamps, and that the efficiency of the surface impregnated catalyst varies in the order Cu > V > Cr.
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Affiliation(s)
- S. Belekbir
- Laboratoire de Physico-Chimie des Matériaux et Nanomateriaux, Faculté des Sciences, Université Mohammed V, Avenue Ibn Battouta, Rabat BP 1014, Morocco; (S.B.); (M.E.A.); (A.E.H.)
| | - M. El Azzouzi
- Laboratoire de Physico-Chimie des Matériaux et Nanomateriaux, Faculté des Sciences, Université Mohammed V, Avenue Ibn Battouta, Rabat BP 1014, Morocco; (S.B.); (M.E.A.); (A.E.H.)
| | - A. El Hamidi
- Laboratoire de Physico-Chimie des Matériaux et Nanomateriaux, Faculté des Sciences, Université Mohammed V, Avenue Ibn Battouta, Rabat BP 1014, Morocco; (S.B.); (M.E.A.); (A.E.H.)
| | | | - J. Arturo Santaballa
- Grupo React!, Departamento de Química, Facultade de Ciencias & CICA, Universidade da Coruña, E-15071 A Coruña, Spain;
| | - M. Canle
- Grupo React!, Departamento de Química, Facultade de Ciencias & CICA, Universidade da Coruña, E-15071 A Coruña, Spain;
- Correspondence:
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130
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Liu Z, Ma Z. Promoting the photocatalytic activity of Bi 4Ti 3O 12 microspheres by incorporating iron. RSC Adv 2020; 10:19232-19239. [PMID: 35515437 PMCID: PMC9054072 DOI: 10.1039/d0ra03305g] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Accepted: 05/08/2020] [Indexed: 11/25/2022] Open
Abstract
Small amounts of Fe(NO3)3 were added to the synthesis mixture prior to the hydrothermal synthesis of Bi4Ti3O12 microspheres. The physicochemical properties of the resulting materials were changed accordingly. The photocatalytic activities of several samples were studied through the photocatalytic degradation of organic pollutants. The samples with a theoretical Fe atomic percentage of 5.9% showed the highest photocatalytic activity among these samples. The main active species in photocatalytic degradation was demonstrated by radical capturing experiments as h+. The introduction of a suitable amount of Fe to the photocatalyst can facilitate the separation of electron–hole pairs generated upon light irradiation, inhibit their recombination efficiently, and prominently expand the light absorption region, thus leading to higher photocatalytic activity. Small amounts of Fe(NO3)3 were added to the synthesis mixture prior to the hydrothermal synthesis of Bi4Ti3O12 microspheres.![]()
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Affiliation(s)
- Zhendong Liu
- Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3), Department of Environmental Science and Engineering, Fudan University Shanghai 200433 P. R. China
| | - Zhen Ma
- Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3), Department of Environmental Science and Engineering, Fudan University Shanghai 200433 P. R. China.,Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092 P. R. China
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131
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Zhao Z, Omer AA, Qin Z, Osman S, Xia L, Singh RP. Cu/N-codoped TiO 2 prepared by the sol-gel method for phenanthrene removal under visible light irradiation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:17530-17540. [PMID: 31317433 DOI: 10.1007/s11356-019-05787-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Accepted: 06/18/2019] [Indexed: 06/10/2023]
Abstract
Cu/N-codoped TiO2 nanoparticles were prepared by the modified sol-gel method, to study its efficiency for the removing of polyaromatic hydrocarbon (phenanthrene) from an aqueous solution. Urea and copper sulfate pentahydrate were used as sources of doping element for Cu/N-codoped TiO2, respectively. The characterizations of the nanoparticles were done by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and UV-vis diffuse reflectance spectra. XRD revealed that all the nanoparticles were indexed to the anatase phase structure, with crystallite size range from 11 to 30 nm, which decreased with the doping of copper and nitrogen. The photocatalytic activities of Cu/N-codoped TiO2 showed the highest activities than other TiO2 nanoparticles (TiO2 and N-doped TiO2). The photodegradation efficiency of Cu/N-codoped TiO2 on phenanthrene under visible light irradiation was slightly higher (96%) comparing to UV light irradiation (94%). Cu/N-codoped TiO2 was found to be very efficient and economical for phenanthrene removal, because the smallest amount of Cu/N-codoped TiO2 exhibited the best removal efficiency on phenanthrene.
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Affiliation(s)
- Zhenhua Zhao
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, People's Republic of China
| | - Abduelrahman Adam Omer
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, People's Republic of China.
- Department of Civil Engineering, College of Engineering Science, Nyala University, Nyala, Sudan.
| | - Zhirui Qin
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, People's Republic of China
| | - Salaheldein Osman
- Department of Civil Engineering, College of Engineering Science, Nyala University, Nyala, Sudan
- Water Harvesting center, Nyala University, Nyala, Sudan
| | - Liling Xia
- Nanjing Institute of Industry Technology, People's Republic of, Nanjing, 210016, China
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132
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Zinc oxide based photocatalytic degradation of persistent pesticides: A comprehensive review. ACTA ACUST UNITED AC 2020. [DOI: 10.1016/j.enmm.2020.100290] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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133
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Hitam CNC, Jalil AA. A review on exploration of Fe 2O 3 photocatalyst towards degradation of dyes and organic contaminants. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2020; 258:110050. [PMID: 31929077 DOI: 10.1016/j.jenvman.2019.110050] [Citation(s) in RCA: 122] [Impact Index Per Article: 30.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2019] [Revised: 12/11/2019] [Accepted: 12/28/2019] [Indexed: 05/20/2023]
Abstract
Photocatalytic degradation is among the promising technology for removal of various dyes and organic contaminants from environment owing to its excellent catalytic activity, low energy utilization, and low cost. As one of potential photocatalysts, Fe2O3 has emerged as an important material for degradation of numerous dyes and organic contaminants caused by its tolerable band gap, wide harvesting of visible light, good stability and recyclability. The present review thoroughly summarized the classification, synthesis route of Fe2O3 with different morphologies, and several modifications of Fe2O3 for improved photocatalytic performance. These include the incorporation with supporting materials, formation of heterojunction with other semiconductor photocatalysts, as well as the fabrication of Z-scheme. Explicitly, the other photocatalytic applications of Fe2O3, including for removal of heavy metals, reduction of CO2, evolution of H2, and N2 fixation are also deliberately discussed to further highlight the huge potential of this catalyst. Moreover, the prospects and future challenges are also comprised to expose the unscrutinized criteria of Fe2O3 photocatalyst. This review aims to contribute a knowledge transfer for providing more information on the potential of Fe2O3 photocatalyst. In the meantime, it might give an idea for utilization of this photocatalyst in other environmental remediation application.
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Affiliation(s)
- C N C Hitam
- School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia (UTM), 81310, Johor Bahru, Johor, Malaysia
| | - A A Jalil
- School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia (UTM), 81310, Johor Bahru, Johor, Malaysia; Centre of Hydrogen Energy, Institute of Future Energy, Universiti Teknologi Malaysia (UTM), 81310, Johor Bahru, Johor, Malaysia.
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134
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Shen C, Gu X, Yang B, Zhang D, Wang Z, Shu Z, Dick J, Lu A. Mineralogical characteristics and photocatalytic properties of natural sphalerite from China. J Environ Sci (China) 2020; 89:156-166. [PMID: 31892388 DOI: 10.1016/j.jes.2019.10.017] [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: 03/29/2019] [Revised: 10/16/2019] [Accepted: 10/24/2019] [Indexed: 06/10/2023]
Abstract
Different natural sphalerites have a range of photocatalytic properties that can potentially be exploited for environmental remediation purposes. To develop value in the exploitation of sphalerite, samples were collected from 19 ore deposits in China and characterized for their mineralogical and photocatalytic properties. X-ray diffraction (XRD) and electron probe micro analysis (EPMA) measurements indicated that all the natural sphalerites from various localities crystallized in cubic phases with various chemical compositions. The substitution of Fe for Zn ranged from 0.235% to 14.826% by weight, Mn from 0.004% to 4.868%, Cu from 0.009% to 5.529% and Cd from 0.133% to 1.576%. As Fe became more abundant, the color of natural sphalerite darkened, becoming almost black; and higher Fe content was associated with stronger visible light absorption. Photoluminescence spectra showed emission mainly related to S-vacancies and progressively decreasing fluorescence intensity with increasing Fe content. Tests of the photocatalytic degradation of methyl orange indicated that the sample with the highest Cd content but moderate Fe content had the highest photocatalytic activity. Specifically, the degradation of Methyl Orange (30 mg/L) attained 82.11% efficiency under visible light irradiation for 4 hr of natural sphalerite with 4.262% Fe and 1.576% Cd. Overall, the Fe content in sphalerite was found to contribute to the visible light absorption ability and the recombination rate of photo-generated electrons and holes, while substitution by Cd was observed to have a greater effect on the photocatalytic properties. These findings provide a scientific basis for the profitable utilization of base metal resources like sphalerite.
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Affiliation(s)
- Can Shen
- Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring Ministry of Education, Central South University, Changsha 410083, China; School of Geoscience and Info-physics, Central South University, Changsha 410083, China
| | - Xiangping Gu
- Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring Ministry of Education, Central South University, Changsha 410083, China; School of Geoscience and Info-physics, Central South University, Changsha 410083, China
| | - Bin Yang
- Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring Ministry of Education, Central South University, Changsha 410083, China; School of Geoscience and Info-physics, Central South University, Changsha 410083, China
| | - Dexian Zhang
- Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring Ministry of Education, Central South University, Changsha 410083, China; School of Geoscience and Info-physics, Central South University, Changsha 410083, China
| | - Zhilin Wang
- Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring Ministry of Education, Central South University, Changsha 410083, China; School of Geoscience and Info-physics, Central South University, Changsha 410083, China
| | - Zhengxiang Shu
- Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring Ministry of Education, Central South University, Changsha 410083, China; School of Geoscience and Info-physics, Central South University, Changsha 410083, China
| | - Jeffrey Dick
- Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring Ministry of Education, Central South University, Changsha 410083, China; School of Geoscience and Info-physics, Central South University, Changsha 410083, China
| | - Anhuai Lu
- Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring Ministry of Education, Central South University, Changsha 410083, China; School of Geoscience and Info-physics, Central South University, Changsha 410083, China.
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135
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Xu HY, Lu D, Tan Q, He XL, Qi SY. Visible-light-driven photocatalytic degradation of rhodamine B in water by BiOCl xI 1-x solid solutions. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2020; 81:1080-1089. [PMID: 32541124 DOI: 10.2166/wst.2020.205] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Bismuth oxyhalides (BiOXs, X = Cl, Br and I) are emerging photocatalytic materials with unique layered structure, flexible band structure and superior photocatalytic activity. The purpose of this study was to develop a facile alcoholysis route to prepare BiOClxI1-x nanosheet solid solutions at room temperature. X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), UV-vis diffuse reflectance spectroscopy (UV-vis DRS), photoluminescence emission spectroscopy (PL) and Brunauer-Emmett-Teller (BET) surface area analyzer were used to characterize the as-prepared photocatalysts. These results revealed that two-dimension BiOClxI1-x nanosheet solid solutions could be obtained with high percentage of {001} crystal facets exposed. Moreover, the formation of solid solution could regularly change the optical absorption thresholds and band gaps of BiOClxI1-x photocatalysts. The photocatalytic experiments indicated that BiOCl0.75I0.25 exhibited the highest photocatalytic performance for the degradation of Rhodamine B (RhB) under simulated sunlight irradiation and the photocatalytic process followed a pseudo-first-order kinetic equation. A possible mechanism of RhB photodegradation over BiOClxI1-x solid solutions was proposed based on the structural properties of BiOClxI1-x solid solutions and RhB photosensitization.
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Affiliation(s)
- Huan-Yan Xu
- School of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 150040, China E-mail:
| | - Dan Lu
- School of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 150040, China E-mail:
| | - Qu Tan
- School of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 150040, China E-mail:
| | - Xiu-Lan He
- School of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 150040, China E-mail:
| | - Shu-Yan Qi
- School of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 150040, China E-mail:
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136
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Gupta NK, Ghaffari Y, Bae J, Kim KS. Synthesis of coral-like α-Fe2O3 nanoparticles for dye degradation at neutral pH. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.112473] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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137
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Zouhier M, Tanji K, Navio J, Hidalgo M, Jaramillo-Páez C, Kherbeche A. Preparation of ZnFe2O4/ZnO composite: Effect of operational parameters for photocatalytic degradation of dyes under UV and visible illumination. J Photochem Photobiol A Chem 2020. [DOI: 10.1016/j.jphotochem.2019.112305] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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138
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Yang L, Chen C, Hu Y, Wei F, Cui J, Zhao Y, Xu X, Chen X, Sun D. Three-dimensional bacterial cellulose/polydopamine/TiO2 nanocomposite membrane with enhanced adsorption and photocatalytic degradation for dyes under ultraviolet-visible irradiation. J Colloid Interface Sci 2020; 562:21-28. [DOI: 10.1016/j.jcis.2019.12.013] [Citation(s) in RCA: 55] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Revised: 12/02/2019] [Accepted: 12/03/2019] [Indexed: 12/11/2022]
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139
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Abstract
In the last decades, photocatalysis has arisen as a solution to degrade emerging pollutants such as antibiotics. However, the reduced photoactivation of TiO2 under visible radiation constitutes a major drawback because 95% of sunlight radiation is not being used in this process. Thus, it is critical to modify TiO2 nanoparticles to improve the ability to absorb visible radiation from sunlight. This work reports on the synthesis of TiO2 nanoparticles decorated with gold (Au) nanoparticles by deposition-precipitation method for enhanced photocatalytic activity. The produced nanocomposites absorb 40% to 55% more radiation in the visible range than pristine TiO2, the best results being obtained for the synthesis performed at 25 °C and with Au loading of 0.05 to 0.1 wt. %. Experimental tests yielded a higher photocatalytic degradation of 91% and 49% of ciprofloxacin (5 mg/L) under UV and visible radiation, correspondingly. Computational modeling supports the experimental results, showing the ability of Au to bind TiO2 anatase surfaces, the relevant role of Au transferring electrons, and the high affinity of ciprofloxacin to both Au and TiO2 surfaces. Hence, the present work represents a reliable approach to produce efficient photocatalytic materials and an overall contribution in the development of high-performance Au/TiO2 photocatalytic nanostructures through the optimization of the synthesis parameters, photocatalytic conditions, and computational modeling.
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140
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Hameeda B, Mushtaq A, Saeed M, Munir A, Jabeen U, Waseem A. Development of Cu-doped NiO nanoscale material as efficient photocatalyst for visible light dye degradation. TOXIN REV 2020. [DOI: 10.1080/15569543.2020.1725578] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Bibi Hameeda
- Department of Chemistry, Sardar Bahadur Khan Women’s University, Quetta, Pakistan
| | - Ayesha Mushtaq
- Department of Chemistry, Sardar Bahadur Khan Women’s University, Quetta, Pakistan
| | - Muhammad Saeed
- Department of Chemistry, Quaid-i-Azam University, Islamabad, Pakistan
| | - Akhtar Munir
- Department of Chemistry and Chemical Engineering, Lahore University of Management Sciences, Lahore, Pakistan
| | - Uzma Jabeen
- Department of Chemistry, Sardar Bahadur Khan Women’s University, Quetta, Pakistan
| | - Amir Waseem
- Department of Chemistry, Quaid-i-Azam University, Islamabad, Pakistan
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141
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Akram N, Guo J, Ma W, Guo Y, Hassan A, Wang J. Synergistic Catalysis of Co(OH) 2/CuO for the Degradation of Organic Pollutant Under Visible Light Irradiation. Sci Rep 2020; 10:1939. [PMID: 32029883 PMCID: PMC7005304 DOI: 10.1038/s41598-020-59053-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Accepted: 01/23/2020] [Indexed: 11/25/2022] Open
Abstract
The exploration of advanced water treatment technologies e.g. heterogeneous photocatalysis is the most promising way to address organic pollution issues. Semiconductors based bimetallic photocatalysis with wide bandgap, have displayed splendid degradation performance in the UV light region, but their extension to the visible light/near infra-red region is still a matter of great concern. CuO, Co(OH)2, CoO and Co(OH)2/CuO nanocomposites were synthesized via simple co-precipitation method and further practiced for Rhodamine B (RhB) decomposition by introducing per-sulfate (PS) as a sacrificial agent. Results revealed that Co(OH)2/CuO catalyst had shown robust catalytic activity for RhB photodegradation (degradation time 8 min, k = 0.864 min−1) under light illumination, significantly less (12–60 times) than the other reported bimetallic catalysts. Catalyst also have verified excellent performance for a broader pH range (5–9) with excellent stability. Main reactive species responsible for the photocatalytic reaction were sulfate (SO4•−) and superoxide (O2•) radicals, duly verified by ESR and by using radical scavengers. With outstanding recycling abilities, this is probably the fewer successful attempt for RhB decolorization and can be highly favorable for effluent treatment by using the synergic effect of absorption and photodegradation.
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Affiliation(s)
- Naeem Akram
- Key Laboratory of Oil and Gas Fine Chemicals, Ministry of Education & Xinjiang Uygur Autonomous Region, College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi, 830046, China
| | - Jia Guo
- Key Laboratory of Oil and Gas Fine Chemicals, Ministry of Education & Xinjiang Uygur Autonomous Region, College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi, 830046, China
| | - Wenlan Ma
- Key Laboratory of Oil and Gas Fine Chemicals, Ministry of Education & Xinjiang Uygur Autonomous Region, College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi, 830046, China
| | - Yuan Guo
- Key Laboratory of Oil and Gas Fine Chemicals, Ministry of Education & Xinjiang Uygur Autonomous Region, College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi, 830046, China
| | - Afaq Hassan
- Key Laboratory of Oil and Gas Fine Chemicals, Ministry of Education & Xinjiang Uygur Autonomous Region, College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi, 830046, China
| | - Jide Wang
- Key Laboratory of Oil and Gas Fine Chemicals, Ministry of Education & Xinjiang Uygur Autonomous Region, College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi, 830046, China.
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142
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143
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Chauhan A, Sillu D, Agnihotri S. Removal of Pharmaceutical Contaminants in Wastewater Using Nanomaterials: A Comprehensive Review. Curr Drug Metab 2020; 20:483-505. [PMID: 30479212 DOI: 10.2174/1389200220666181127104812] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Revised: 10/08/2018] [Accepted: 10/11/2018] [Indexed: 11/22/2022]
Abstract
BACKGROUND The limitless presence of pharmaceutical contaminants in discharged wastewater has emerged as a threat to aquatic species and humans. Their presence in drinking water has although raised substantial concerns, very little is known about the fate and ecological impacts of these pollutants. As a result, these pollutants are inevitably introduced to our food chain at trace concentrations. Unfortunately, the conventional wastewater treatment techniques are unable to treat pharmaceuticals completely with practical limitations. The focus has now been shifted towards nanotechnology for the successful remediation of these persistent pollutants. Thus, the current review specifically focuses on providing readers brief yet sharp insights into applications of various nanomaterials for the removal of pharmaceutical contaminants. METHODS An exhaustive collection of bibliographic database was done with articles having high impact and citations in relevant research domains. An in-depth analysis of screened papers was done through standard tools. Studies were categorized according to the use of nanoscale materials as nano-adsorbents (graphene, carbon nanotubes), nanophotocatalysts (metal, metal oxide), nano-filtration, and ozonation for promising alternative technologies for the efficient removal of recalcitrant contaminants. RESULTS A total of 365 research articles were selected. The contemporary advancements in the field of nanomaterials for drinking and wastewater treatment have been thoroughly analyzed along with their future perspectives. CONCLUSION The recommendations provided in this article will be useful to adopt novel strategies for on-site removal of the emerging contaminants in pharmaceutical effluents and related industries.
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Affiliation(s)
- Anjali Chauhan
- Department of Biotechnology, Thapar Institute of Engineering and Technology, Patiala-147004, Punjab, India
| | - Devendra Sillu
- Department of Biotechnology, Thapar Institute of Engineering and Technology, Patiala-147004, Punjab, India
| | - Shekhar Agnihotri
- Department of Biotechnology, Thapar Institute of Engineering and Technology, Patiala-147004, Punjab, India.,TIFAC Centre of Relevance and Excellence (CORE) in Agro and Industrial Biotechnology, Thapar Institute of Engineering and Technology, Patiala 147004, Punjab, India
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144
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Farjood M, Zanjanchi MA. A new synthesis methodology for SiO 2 gel-based nanostructures and their application for elimination of dye pollutants. NEW J CHEM 2020. [DOI: 10.1039/d0nj00093k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
A new procedure for preparation of a high specific surface area silica-based nanostructure and its copper-containing active photocatalyst is described.
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Affiliation(s)
- Mehrdad Farjood
- Department of Chemistry
- Faculty of Science
- University of Guilan
- Rasht 41335-1914
- Iran
| | - M. A. Zanjanchi
- Department of Chemistry
- Faculty of Science
- University of Guilan
- Rasht 41335-1914
- Iran
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145
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Abdel Maksoud M, Elgarahy AM, Farrell C, Al-Muhtaseb AH, Rooney DW, Osman AI. Insight on water remediation application using magnetic nanomaterials and biosorbents. Coord Chem Rev 2020. [DOI: 10.1016/j.ccr.2019.213096] [Citation(s) in RCA: 71] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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146
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Narsimha K, Babu MS, Anuradha N, Guda S, Kumar BK, Mallesh D, Upender G, Reddy PM, Kumar BV. Preparation and characterization of CdWO 4:Cu nanorods with enhanced photocatalytic performance under sunlight irradiation. NEW J CHEM 2020. [DOI: 10.1039/c9nj05763c] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The objective of this work is to convert an ultraviolet active photocatalyst to a visible active photocatalyst and investigate the effect of copper (Cu2+) doping on the morphology and photocatalytic activity of CdWO4.
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Affiliation(s)
- Kura Narsimha
- Nanomaterials and Catalysis Research Laboratory
- Department of Chemistry
- Nizam College
- Osmania University
- Hyderabad-01
| | - M. Shekar Babu
- Nanomaterials and Catalysis Research Laboratory
- Department of Chemistry
- Nizam College
- Osmania University
- Hyderabad-01
| | - N. Anuradha
- Nanomaterials and Catalysis Research Laboratory
- Department of Chemistry
- Nizam College
- Osmania University
- Hyderabad-01
| | - Swarupa Guda
- Nanomaterials and Catalysis Research Laboratory
- Department of Chemistry
- Nizam College
- Osmania University
- Hyderabad-01
| | - B. Kranthi Kumar
- Nanomaterials and Catalysis Research Laboratory
- Department of Chemistry
- Nizam College
- Osmania University
- Hyderabad-01
| | - D. Mallesh
- Indian Institute of Chemical Technology
- Hyderabad
- India
| | - G. Upender
- Department of Physics
- Nizam College
- Osmania University
- Hyderabad-01
- India
| | - P. Muralidhar Reddy
- Nanomaterials and Catalysis Research Laboratory
- Department of Chemistry
- Nizam College
- Osmania University
- Hyderabad-01
| | - B. Vijaya Kumar
- Nanomaterials and Catalysis Research Laboratory
- Department of Chemistry
- Nizam College
- Osmania University
- Hyderabad-01
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147
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Ortiz-Bustos J, Gómez-Ruiz S, Mazarío J, Domine ME, del Hierro I, Pérez Y. Copper and sulphur co-doped titanium oxide nanoparticles with enhanced catalytic and photocatalytic properties. Catal Sci Technol 2020. [DOI: 10.1039/d0cy01041c] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Copper and sulphur co-doped titanium oxide nanoparticles have been prepared by the sol–gel method to develop versatile catalysts exhibiting enhanced catalytic and photocatalytic properties.
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Affiliation(s)
- Josefa Ortiz-Bustos
- Departamento de Biología y Geología
- Física y Química Inorgánica
- Escuela Superior de Ciencias Experimentales y Tecnología
- Universidad Rey Juan Carlos
- Madrid
| | - Santiago Gómez-Ruiz
- Departamento de Biología y Geología
- Física y Química Inorgánica
- Escuela Superior de Ciencias Experimentales y Tecnología
- Universidad Rey Juan Carlos
- Madrid
| | - Jaime Mazarío
- Instituto de Tecnología Química (UPV-CSIC)
- Universidad Politécnica de Valencia
- Consejo Superior de Investigaciones Científicas
- Spain
| | - Marcelo E. Domine
- Instituto de Tecnología Química (UPV-CSIC)
- Universidad Politécnica de Valencia
- Consejo Superior de Investigaciones Científicas
- Spain
| | - Isabel del Hierro
- Departamento de Biología y Geología
- Física y Química Inorgánica
- Escuela Superior de Ciencias Experimentales y Tecnología
- Universidad Rey Juan Carlos
- Madrid
| | - Yolanda Pérez
- Departamento de Biología y Geología
- Física y Química Inorgánica
- Escuela Superior de Ciencias Experimentales y Tecnología
- Universidad Rey Juan Carlos
- Madrid
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Chauhan N, Singh V, Kumar S, Dhiman RL. Influence of Nickel, Silver, and Sulphur Doping on the Photocatalytic Efficiency of Mesoporous ZnO Nanoparticles. ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING 2019. [DOI: 10.1007/s13369-019-04291-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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Controlling the recombination of electron-hole pairs by changing the shape of ZnO nanorods via sol-gel method using water and their enhanced photocatalytic properties. KOREAN J CHEM ENG 2019. [DOI: 10.1007/s11814-019-0401-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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The Sonophotocatalytic Degradation of Pharmaceuticals in Water by MnOx-TiO2 Systems with Tuned Band-Gaps. Catalysts 2019. [DOI: 10.3390/catal9110949] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Advanced oxidation processes (AOPs) are technologies to degrade organic pollutants to carbon dioxide and water with an eco-friendly approach to form reactive hydroxyl radicals. Photocatalysis is an AOP whereby TiO2 is the most adopted photocatalyst. However, TiO2 features a wide (3.2 eV) and fast electron-hole recombination. When Mn is embedded in TiO2, it shifts the absorption wavelength towards the visible region of light, making it active for natural light applications. We present a systematic study of how the textural and optical properties of Mn-doped TiO2 vary with ultrasound applied during synthesis. We varied ultrasound power, pulse length, and power density (by changing the amount of solvent). Ultrasound produced mesoporous MnOx-TiO2 powders with a higher surface area (101–158 m2 g−1), pore volume (0-13–0.29 cc g−1), and smaller particle size (4–10 µm) than those obtained with a conventional sol-gel method (48–129 m2 g−1, 0.14–0.21 cc g−1, 181 µm, respectively). Surprisingly, the catalysts obtained with ultrasound had a content of brookite that was at least 28%, while the traditional sol-gel samples only had 7%. The samples synthesized with ultrasound had a wider distribution of the band-gaps, in the 1.6–1.91 eV range, while traditional ones ranged from 1.72 eV to 1.8 eV. We tested activity in the sonophotocatalytic degradation of two model pollutants (amoxicillin and acetaminophen). The catalysts synthesized with ultrasound were up to 50% more active than the traditional samples.
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