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Jiang Y, Jiang Y, Cheng S, Xi Y, Sun X, Xu Y, Yang Z. Modulate synthesis of CeMn solid solution using various alcohols for toluene catalytic oxidation: synergistic effect of Ce-Mn and reaction mechanism. JOURNAL OF HAZARDOUS MATERIALS 2024; 476:135051. [PMID: 38954854 DOI: 10.1016/j.jhazmat.2024.135051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2024] [Revised: 06/13/2024] [Accepted: 06/26/2024] [Indexed: 07/04/2024]
Abstract
A redox co-precipitation method was employed to synthesize CeMn homogeneous solid solutions, utilizing various alcohols as activating agents. Ethanol effectively orchestrated the precipitation of CeO2 and MnOx, promoting their co-growth. As a result, the CeMn-EA achieved 90 % toluene conversion at 218 ℃ (T90 =218 ℃) with a weight hourly space velocity (WHSV) of 48000 ml/(g·h). It also demonstrated high adaptability to increased WHSV, suggesting its potential for industrial-scale applications. The uniform dispersion of Ce and Mn accelerated the coupling between Ce3+/Ce4+ and Mn4+/Mn3+, engineering numerous oxygen vacancies, which enhanced the activation of gas-phase oxygen and the mobility of lattice oxygen. In situ DRIFTS confirmed that toluene oxidation accommodated both Langmuir-Hinshelwood (L-H) and Mars-van Krevelen (MvK) mechanisms, with benzoate identified as a pivotal intermediate. Enhanced oxygen mobility facilitated the cleavage of the benzene ring, which was the rate-determining step. Additionally, the introduction of H2O significantly enhanced the dissociation and adsorption of toluene and facilitated the activation of gas-phase oxygen. At higher temperatures, H2O could further activate lattice oxygen engaging in toluene oxidation. ENVIRONMENTAL IMPLICATION: Volatile organic compounds (VOCs) have emerged as major air pollutants due to the changes in air pollution patterns. They can act as precursors to near-surface ozone and haze. Toluene, a typical VOC, is primarily released from anthropogenic sources and poses significant risks to human health and the environment. Ce-based catalysts have been demonstrated efficiency in toluene oxidation due to their excellent oxygen storage and release properties. This study synthesized CeMn homogeneous solid solutions utilizing various alcohols as activating agents, which possessed abundant oxygen vacancies and optimum oxygen activation capacity to oxidize toluene in time.
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Affiliation(s)
- Ye Jiang
- College of New Energy, China University of Petroleum (East China), 66 West Changjiang Road, Qingdao 266580, China; Qingdao Engineering Research Center of Efficient and clean Utilization of Fossil Energy, Qingdao 266580, China
| | - Yinsheng Jiang
- College of New Energy, China University of Petroleum (East China), 66 West Changjiang Road, Qingdao 266580, China; Qingdao Engineering Research Center of Efficient and clean Utilization of Fossil Energy, Qingdao 266580, China
| | - Siyuan Cheng
- College of New Energy, China University of Petroleum (East China), 66 West Changjiang Road, Qingdao 266580, China; Qingdao Engineering Research Center of Efficient and clean Utilization of Fossil Energy, Qingdao 266580, China
| | - Yanyan Xi
- Advanced Chemical Engineering and Energy Materials Research Center, China University of Petroleum (East China), 66 West Changjiang Road, Qingdao 266580, China
| | - Xin Sun
- College of New Energy, China University of Petroleum (East China), 66 West Changjiang Road, Qingdao 266580, China; Qingdao Engineering Research Center of Efficient and clean Utilization of Fossil Energy, Qingdao 266580, China
| | - Yichao Xu
- College of New Energy, China University of Petroleum (East China), 66 West Changjiang Road, Qingdao 266580, China; Qingdao Engineering Research Center of Efficient and clean Utilization of Fossil Energy, Qingdao 266580, China
| | - Zhengda Yang
- College of New Energy, China University of Petroleum (East China), 66 West Changjiang Road, Qingdao 266580, China; Qingdao Engineering Research Center of Efficient and clean Utilization of Fossil Energy, Qingdao 266580, China.
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2
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Somu SK, Swaminathan SV, Selvakumar P, Pal A, Kundu T. Threefold enhanced photodegradation of methylene blue using MgO composite with minimum Nd 2O 3: finding the sweet spot. Photochem Photobiol Sci 2024; 23:1533-1542. [PMID: 39030314 DOI: 10.1007/s43630-024-00614-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2024] [Accepted: 07/11/2024] [Indexed: 07/21/2024]
Abstract
Removal of organic dyes like methylene blue (MB) from industrial effluents serves as potential source of potable water. Photocatalytic degradation using sustainable catalyst is deemed to be an affordable solution. In this work, Nd2O3/MgO nanocomposite with different compositions (1, 3, and 5wt% Nd2O3 with MgO) have been achieved using hydrothermal synthesis and characterized extensively. Interestingly, increasing Nd2O3 proportion (1-5%) enhances light absorption, and decreases band gap and electron-hole recombination. The efficacy of the photocatalysts is tested with the degradation of MB dye, through optimizing Nd2O3/MgO proportion, contact time, catalyst dose, and pH. Interestingly, control experiments reveal that 5wt% Nd2O3/MgO achieve 99.6% degradation of MB in 90 min at pH 7, compared to 88.8% with bare MgO under same condition. Kinetic data show that 5wt% Nd2O3/MgO exhibits ca. 3 times higher degradation rate compared to MgO. For the first time, our work enable MgO-based sustainable photocatalyst development with minimum (5 wt%) rare-earth combination to achieve excellent photocatalytic degradation performance.
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Affiliation(s)
- Sathish Kumar Somu
- Department of Chemistry, SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu, 603203, India
| | - Sri Vanaja Swaminathan
- Department of Chemistry, SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu, 603203, India
| | - Powrnika Selvakumar
- Department of Chemistry, SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu, 603203, India
| | - Amrita Pal
- Department of Chemistry, Sathyabama Institute of Science and Technology, Jeppiaar Nagar, Rajiv Gandhi Salai, Chennai, Tamil Nadu, 600119, India
| | - Tanay Kundu
- Department of Chemistry, SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu, 603203, India.
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3
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Qian X, Zhao S, Hao Q, Jin L, Zhang K, Li B. Influence of Nd-MOF/CNF-derived Nd 2O 3-C/CNF composite on lithium-sulfur batteries. Dalton Trans 2024; 53:11938-11951. [PMID: 38958052 DOI: 10.1039/d4dt01193g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/04/2024]
Abstract
The shuttle effect of soluble lithium polysulfide (LiPS) is a major obstacle to the practical application of lithium-sulfur (Li-S) batteries. In order to reduce the negative impact of the shuttle effect, Nd-MOF was combined with carbon nanofibers (CNFs) so that Nd-MOF was embedded in the CNFs and the Nd2O3-C/CNF composite was realized as a separation modification material. This embedded structure made the combination between Nd2O3-C and CNFs tighter, and it exhibited better synergistic effects to inhibit the shuttle effect of polysulfides while also enhancing the tensile strength of the separator and improving the safety performance of the battery. Based on these advantages, a lithium-sulfur coin cell with the Nd2O3-C/CNF-modified separator exhibited excellent electrochemical performance.
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Affiliation(s)
- Xinye Qian
- Institute for Advanced Materials, College of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, P. R. China.
| | - Shuailong Zhao
- Institute for Advanced Materials, College of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, P. R. China.
| | - Qingyuan Hao
- Institute for Advanced Materials, College of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, P. R. China.
| | - Lina Jin
- Institute for Advanced Materials, College of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, P. R. China.
| | - Ke Zhang
- Institute for Advanced Materials, College of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, P. R. China.
| | - Baozhong Li
- Institute for Advanced Materials, College of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, P. R. China.
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4
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Nawaz R, Ullah H, Ghanim AAJ, Irfan M, Anjum M, Rahman S, Ullah S, Abdel Baki Z, Kumar Oad V. Green Synthesis of ZnO and Black TiO 2 Materials and Their Application in Photodegradation of Organic Pollutants. ACS OMEGA 2023; 8:36076-36087. [PMID: 37810725 PMCID: PMC10551907 DOI: 10.1021/acsomega.3c04229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Accepted: 09/12/2023] [Indexed: 10/10/2023]
Abstract
ZnO and black TiO2 have been selected as the most efficient materials for organic pollution abatement due to their increased efficiency when compared to other materials. However, the concept of green chemistry makes it desirable to design green synthesis approaches for their production. In this study, black TiO2 was synthesized using an environmentally safe synthetic technique with glycerol as a reductant. ZnO was prepared by using ionic-liquid-based microwave-assisted extracts of Polygonum minus. To investigate the materials' potential to photodegrade organic pollutants, methylene blue (MB) and phenol were chosen as model organic pollutants. Both materials were found to exhibit spherical morphologies and a mesoporous structure and were efficient absorbers of visible light. ZnO exhibited electron-hole pair recombination lower than that of black TiO2. Black TiO2 was discovered to be an anatase phase, whereas ZnO was found to have a hexagonal wurtzite structure. In contrast to black TiO2, which had a surface area of 239.99 m2/g and a particle size of 28 nm, ZnO had a surface area of 353.11 m2/g and a particle size of 32 nm. With a degradation time of 60 min, ZnO was able to eliminate 97.50% of the 40 mg/L MB. Black TiO2, on the other hand, could reduce 90.0% of the same amount of MB in 60 min. When tested for phenol degradation, ZnO and black TiO2 activities were reduced by nearly 15 and 25%, respectively. A detailed examination of both ZnO and black TiO2 materials revealed that ZnO has more potential and versatility for the degradation of organic pollutants under visible light irradiation.
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Affiliation(s)
- Rab Nawaz
- Institute
of Soil and Environmental Sciences, Pir
Mehr Ali Shah Arid Agriculture University Shamsabad, Murree Road, 46300 Rawalpindi, Pakistan
- Department
of Earth Sciences and Environment, Faculty of Science and Technology, Universiti Kebangsaan Malaysia (UKM), 43600 Bangi, Selangor, Malaysia
- Centre
for Research and Instrumentation Management (CRIM), Universiti Kebangsaan (UKM), 43600 Bangi, Selangor, Malaysia
| | - Habib Ullah
- Fundamental
and Applied Sciences (FASD), Universiti
Teknologi PETRONAS (UTP), 32610 Seri Iskandar, Perak, Malaysia
| | | | - Muhammad Irfan
- Electrical
Engineering Department, College of Engineering, Najran University, Najran 61441, Saudi Arabia
| | - Muzammil Anjum
- Institute
of Soil and Environmental Sciences, Pir
Mehr Ali Shah Arid Agriculture University Shamsabad, Murree Road, 46300 Rawalpindi, Pakistan
| | - Saifur Rahman
- Electrical
Engineering Department, College of Engineering, Najran University, Najran 61441, Saudi Arabia
| | - Shafi Ullah
- Institute
of Soil and Environmental Sciences, Pir
Mehr Ali Shah Arid Agriculture University Shamsabad, Murree Road, 46300 Rawalpindi, Pakistan
| | - Zaher Abdel Baki
- College
of Engineering and Technology, American
University of the Middle East, Egaila 15453, Kuwait
| | - Vipin Kumar Oad
- Faculty
of Civil and Environmental Engineering, Gdansk University of Technology, 80-233 Gdansk, Poland
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5
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Chen W, Liu Z, Dai X, Zhao Z, Du B, Zhang K, Ma D, Fan L, Huang X. Transformation of tetracycline by multipurpose Fe-Mn-Cu nano-composite oxide: Dual-synergies and dual-mechanisms. JOURNAL OF HAZARDOUS MATERIALS 2023; 454:131400. [PMID: 37099908 DOI: 10.1016/j.jhazmat.2023.131400] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Revised: 03/28/2023] [Accepted: 04/11/2023] [Indexed: 05/19/2023]
Abstract
The interaction between tetracycline (TTC) and mixed metallic oxides remains unclear, and even complexation usually is ignored. This study firstly distinguished the triple functions of adsorption, transformation and complexation in presence of Fe-Mn-Cu nano-composite metallic oxide (FMC) on TTC. Rapid adsorption and faint complexation initiated the transformation that dominated the entire reactions at 180 min, which completed TTC removal (up to 99.04%) synergistically within 48 h. Environmental factors (dosage, pH and coexisting ions) had small influence on TTC removal, which primarily depended on the stable transformation characteristics of FMC. Kinetic models incorporating pseudo-second-order kinetics and transformation reaction kinetics demonstrated that the surface sites of FMC promoted electron transfer process through chemical adsorption and electrostatic attraction. ProtoFit program coupled with characterization methods concluded that Cu-OH was the main reaction site of FMC where the protonated surface favored to generate·O2-. Meanwhile, three metal ions developed simultaneous mediated transformation reactions on TTC in liquid phase, and·O2- induced the production of·OH. The transformed products were subjected to toxicity assessment, which had lost antimicrobial properties toward Escherichia coli. Insights gained from this study can refine the dual mechanisms of multipurpose FMC in solid and liquid phases underlying TTC transformation.
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Affiliation(s)
- Wei Chen
- College of Civil Engineering, Sichuan Agricultural University, Chengdu 611830, China; Sichuan Higher Education Engineering Research Center for Disaster Prevention and Mitigation of Village Construction, Sichuan Agricultural University, Chengdu 611830, China
| | - Zhujun Liu
- College of Civil Engineering, Sichuan Agricultural University, Chengdu 611830, China.
| | - Xinning Dai
- College of Civil Engineering, Sichuan Agricultural University, Chengdu 611830, China
| | - Zhihan Zhao
- College of Civil Engineering, Sichuan Agricultural University, Chengdu 611830, China
| | - Bin Du
- Students Innovation and Entrepreneurship Center, Enrollment and Employment Department, Sichuan Agricultural University, Chengdu 611130, China
| | - Ke Zhang
- College of Civil Engineering, Sichuan Agricultural University, Chengdu 611830, China; Sichuan Higher Education Engineering Research Center for Disaster Prevention and Mitigation of Village Construction, Sichuan Agricultural University, Chengdu 611830, China
| | - Dandan Ma
- College of Civil Engineering, Sichuan Agricultural University, Chengdu 611830, China; Sichuan Higher Education Engineering Research Center for Disaster Prevention and Mitigation of Village Construction, Sichuan Agricultural University, Chengdu 611830, China
| | - Liangqian Fan
- College of Civil Engineering, Sichuan Agricultural University, Chengdu 611830, China; Sichuan Higher Education Engineering Research Center for Disaster Prevention and Mitigation of Village Construction, Sichuan Agricultural University, Chengdu 611830, China
| | - Xianbin Huang
- College of Civil Engineering, Sichuan Agricultural University, Chengdu 611830, China; Sichuan Higher Education Engineering Research Center for Disaster Prevention and Mitigation of Village Construction, Sichuan Agricultural University, Chengdu 611830, China.
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6
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Almenia SH, Ismail AA, Alzahrani KA, Aljahdali M. Design of mesoporous heterojunction CuCo2O4/Co3O4 photocatalyst with superior photocatalytic degradation of tetracycline. J Photochem Photobiol A Chem 2023. [DOI: 10.1016/j.jphotochem.2022.114507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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7
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Alzahrani KA, Ismail AA. Enhanced photocatalytic performances of highly efficient perovskite BaSnO3 nanorods decorated by CuMn2O4 nanoparticles. J Photochem Photobiol A Chem 2023. [DOI: 10.1016/j.jphotochem.2022.114298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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8
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Visible-light driven of heterostructured LaFeO3/TiO2 photocatalysts for degradation of antibiotics: Ciprofloxacin as case study. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2022.114078] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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9
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Ahmad J, Wahab R, Siddiqui MA, Farshori NN, Saquib Q, Ahmad N, Al-Khedhairy AA. Neodymium oxide nanostructures and their cytotoxic evaluation in human cancer cells. J Trace Elem Med Biol 2022; 73:127029. [PMID: 35785590 DOI: 10.1016/j.jtemb.2022.127029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Revised: 06/15/2022] [Accepted: 06/22/2022] [Indexed: 11/25/2022]
Abstract
Neodymium oxide exhibits a unique property, which facilitates and largely utilized as an industrial applications. A number of cytotoxic study is available but very limited information is available to understand their biological activity with neodymium oxide at a very low conc- entration of the material. The present work was designed to understand the cytotoxicity against liver (HepG-2) and lung (A-549) cancer cells. Initially, Neodymium oxides (Nd2O3) were prepared and characterized with various instruments. The crystallinity and morphology of Nd2O3 powder were examined with instruments such as X-Ray Diffraction (XRD), scanning electron microscope (SEM), Transmission electron microscopy (TEM), Energy Dispersive X-Ray Analysis (EDX) respectively, revealed the size of curved nanostructure are ~140 ± 2 in diameter whereas length goes upto ~700 nm with elemental composition. The cytotoxicity study was conducted with MTT, NRU assay with genotoxicity study via ROS, cell cycle and qPCR analysis. The cells cytotoxic assessment were analysed via MTT(3-(4,5-Dimethylthiazol-2-yl)- 2,5-Diphenyl tetra zolium Bromide) and Neutral Red Uptake (NRU) assay with neodymium oxide (Nd2O3), which indicates the reduction in cell viability. Additionally, cell-cycle analysis showed an increase in the apoptotic peak after a 24-h. Quantitative real-time PCR (RT-PCR) data revealed that apoptotic genes such as p53, bax, and caspase-3 were up regulated, whereas bcl-2, an anti-apoptotic gene, was down regulated; therefore, apoptosis was mediated through ROS and genotoxicity pathways. The experiments of cytotoxicity was tested and concludes that the Nd2O3 express a moderate and dose dependent effect on cancer cells. The ROS, cell cycle analysis and qPCR showed that Nd2O3 exhibit the capability to cells death via ROS generation and genotoxicity study pathways.
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Affiliation(s)
- Javed Ahmad
- Chair for DNA Research, Zoology Department, College of Sciences, King Saud University, Riyadh 11451, Saudi Arabia.
| | - Rizwan Wahab
- Chair for DNA Research, Zoology Department, College of Sciences, King Saud University, Riyadh 11451, Saudi Arabia; Zoology Department, College of Sciences, King Saud University, Riyadh 11451, Saudi Arabia
| | - Maqsood A Siddiqui
- Chair for DNA Research, Zoology Department, College of Sciences, King Saud University, Riyadh 11451, Saudi Arabia
| | - Nida Nayyar Farshori
- Department of Pharmacognosy, College of Pharmacy, King Saud University, Riyadh 11495, Saudi Arabia
| | - Quaiser Saquib
- Chair for DNA Research, Zoology Department, College of Sciences, King Saud University, Riyadh 11451, Saudi Arabia; Zoology Department, College of Sciences, King Saud University, Riyadh 11451, Saudi Arabia
| | - Naushad Ahmad
- Department of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Abdulaziz A Al-Khedhairy
- Chair for DNA Research, Zoology Department, College of Sciences, King Saud University, Riyadh 11451, Saudi Arabia; Zoology Department, College of Sciences, King Saud University, Riyadh 11451, Saudi Arabia
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10
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Photocatalytic Oxidative Desulfurization of Thiophene by Exploiting a Mesoporous V2O5-ZnO Nanocomposite as an Effective Photocatalyst. Catalysts 2022. [DOI: 10.3390/catal12090933] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Due to increasingly stringent environmental regulations imposed by governments throughout the world, the manufacture of low-sulfur fuels has received considerable assiduity in the petroleum industry. In this investigation, mesoporous V2O5-decorated two-dimensional ZnO nanocrystals were manufactured using a simple surfactant-assisted sol–gel method for thiophene photocatalytic oxidative desulfurization (TPOD) at ambient temperature applying visible illumination. When correlated to pure ZnO NCs, V2O5-added ZnO nanocomposites dramatically improved the photocatalytic desulfurization of thiophene, and the reaction was shown to follow the pseudo-first-order model. The photocatalytic effectiveness of the 3.0 wt.% V2O5-ZnO photocatalyst was the greatest among all the other samples, with a rate constant of 0.0166 min−1, which was 30.7 significantly greater than that of pure ZnO NCs (0.00054 min−1). Compared with ZnO NCs, and owing to their synergetic effects, substantial creation of hydroxyl radical levels, lesser light scattering action, quick transport of thiophene species to the active recenters, and efficient visible-light gathering, V2O5-ZnO nanocomposites were found to have enhanced photocatalytic efficiency. V2O5-ZnO nanocomposites demonstrated outstanding stability during TPOD. Using mesoporous V2O5-ZnO nanocomposites, the mechanism of the charge separation process was postulated.
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11
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Abdurakhmonov OE, Alisultanov ME, Vertaeva DA, Muradova AG. The Effect of Annealing Temperature on Crystallization of Nd2O3 Nanoparticles Synthesized by the Deposition Method. RUSS J INORG CHEM+ 2022. [DOI: 10.1134/s0036023622070026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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12
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Shawky A, Alshaikh H. Cobalt ferrite-modified sol-gel synthesized ZnO nanoplatelets for fast and bearable visible light remediation of ciprofloxacin in water. ENVIRONMENTAL RESEARCH 2022; 205:112462. [PMID: 34863987 DOI: 10.1016/j.envres.2021.112462] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2021] [Revised: 10/29/2021] [Accepted: 11/26/2021] [Indexed: 06/13/2023]
Abstract
Currently, metal oxide photocatalysts is a green and facile tool for the elimination of emerging pollutants utilizing light illumination. Though, the wide bandgap energy (Eg), rapid recombination of photogenerated carriers, and photostability of these oxides represent critical issues before the actual application. Herein, we familiarise a sol-gel based synthesis of ZnO hexagonal nanoplatelets modified with CoFe2O4 (CFO) nanoparticles at minor loading (1.0-4.0 wt %) to yield CFO/ZnO nanoheterojunctions. The CFO/ZnO unveiled mesostructured surfaces at surface areas of 102-120 m2 g-1 and photoactive in the visible region with high. The CFO addition to ZnO reduced its Eg from 3.14 to 2.66 eV. The formed nanoheterojunctions were applied to remediate ciprofloxacin (CPF), as an antibiotic pollutant in wastewater. The 2.4 g L-1 3.0 wt % CFO-added ZnO exhibited a 100% removal of 10-ppm CPF within 45 min of visible-light irradiation and sustainable recycling ability for five consecutive runs at 97%. The sustainable performance of CFO/ZnO is ascribed to the suppression of photogenerated carriers and reduction of E by p-n nanoheterojunction formation. This study broadens the way for nanoheterojunction oxides for the destruction of pharmaceutical wastes under visible-light illumination.
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Affiliation(s)
- Ahmed Shawky
- Nanomaterials and Nanotechnology Department, Advanced Materials Institute, Central Metallurgical R&D Institute (CMRDI), P.O. Box 87, Helwan, 11421, Cairo, Egypt.
| | - Hind Alshaikh
- Chemistry Department, Science and Arts College, Rabigh Campus, King Abdulaziz University, Jeddah, Saudi Arabia.
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13
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El-Sayed F, Hussien MSA, Mohammed MI, Ganesh V, AlAbdulaal TH, Zahran HY, Yahia IS, Hegazy HH, Abdel-wahab MS, Shkir M, Valarasu S, Ibrahim MA. The Photocatalytic Performance of Nd 2O 3 Doped CuO Nanoparticles with Enhanced Methylene Blue Degradation: Synthesis, Characterization and Comparative Study. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:1060. [PMID: 35407178 PMCID: PMC9000884 DOI: 10.3390/nano12071060] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/13/2022] [Revised: 03/09/2022] [Accepted: 03/10/2022] [Indexed: 02/01/2023]
Abstract
The growth of the textile industry results in a massive accumulation of dyes on water. This enormous rise in pigments is the primary source of water pollution, affecting the aquatic lives and our ecosystem balance. This study aims to notify the fabrication of neodymium incorporated copper oxide (Nd2O3 doped CuO) nanoparticles by combustion method for effective degradation of dye, methylene blue (MB). X-ray diffraction (XRD), Field emission Scanning electron microscopy (FESEM), Zeta potential have been applied for characterization. Photocatalyst validity has been evaluated for methylene blue degradation (MB). Test conditions such as time of contact, H2O2, pH, and photo-Fenton have been modified to identify optimal degradation conditions. Noticeably, 7.5% Nd2O3 doped CuO nanoparticle demonstrated the highest photocatalytic efficiency, up to 90.8% in 80 min, with a 0.0227 min-1 degradation rate. However, the photocatalytic efficiency at pH 10 becomes 99% with a rate constant of 0.082 min-1. Cyclic experiments showed the Nd2O3 doped CuO nanoparticle's stability over repeated use. Scavenge hydroxyl radical species responsible for degradation using 7.5% Nd2O3 doped CuO nanoparticles have been investigated under visible irradiation.
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Affiliation(s)
- Fatma El-Sayed
- Nanoscience Laboratory for Environmental and Bio-Medical Applications (NLEBA), Metallurgical Lab.1, Department of Physics, Faculty of Education, Ain Shams University, Roxy, Cairo 11757, Egypt; (F.E.-S.); (M.S.A.H.); (M.I.M.)
| | - Mai S. A. Hussien
- Nanoscience Laboratory for Environmental and Bio-Medical Applications (NLEBA), Metallurgical Lab.1, Department of Physics, Faculty of Education, Ain Shams University, Roxy, Cairo 11757, Egypt; (F.E.-S.); (M.S.A.H.); (M.I.M.)
- Department of Chemistry, Faculty of Education, Ain Shams University, Roxy, Cairo 11757, Egypt
| | - Mervat I. Mohammed
- Nanoscience Laboratory for Environmental and Bio-Medical Applications (NLEBA), Metallurgical Lab.1, Department of Physics, Faculty of Education, Ain Shams University, Roxy, Cairo 11757, Egypt; (F.E.-S.); (M.S.A.H.); (M.I.M.)
| | - Vanga Ganesh
- Laboratory of Nano-Smart Materials for Science and Technology (LNSMST), Department of Physics, Faculty of Science, King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia; (T.H.A.); (H.Y.Z.); (I.S.Y.); (H.H.H.); (M.S.)
| | - Thekrayat H. AlAbdulaal
- Laboratory of Nano-Smart Materials for Science and Technology (LNSMST), Department of Physics, Faculty of Science, King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia; (T.H.A.); (H.Y.Z.); (I.S.Y.); (H.H.H.); (M.S.)
| | - Heba Y. Zahran
- Laboratory of Nano-Smart Materials for Science and Technology (LNSMST), Department of Physics, Faculty of Science, King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia; (T.H.A.); (H.Y.Z.); (I.S.Y.); (H.H.H.); (M.S.)
- Research Center for Advanced Materials Science (RCAMS), King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia
- Semiconductor Laboratory, Department of Physics, Faculty of Education, Ain Shams University, Roxy, Cairo 11757, Egypt
| | - Ibrahim S. Yahia
- Laboratory of Nano-Smart Materials for Science and Technology (LNSMST), Department of Physics, Faculty of Science, King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia; (T.H.A.); (H.Y.Z.); (I.S.Y.); (H.H.H.); (M.S.)
- Research Center for Advanced Materials Science (RCAMS), King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia
- Semiconductor Laboratory, Department of Physics, Faculty of Education, Ain Shams University, Roxy, Cairo 11757, Egypt
| | - Hosam H. Hegazy
- Laboratory of Nano-Smart Materials for Science and Technology (LNSMST), Department of Physics, Faculty of Science, King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia; (T.H.A.); (H.Y.Z.); (I.S.Y.); (H.H.H.); (M.S.)
- Department of Physics, Faculty of Science, Al-Azhar University, Assiut 71524, Egypt
| | - Mohamed Sh. Abdel-wahab
- Materials Science and Nanotechnology Department, Faculty of Postgraduate Studies for Advanced Sciences, Beni–Suef University, Beni–Suef 62511, Egypt;
| | - Mohd. Shkir
- Laboratory of Nano-Smart Materials for Science and Technology (LNSMST), Department of Physics, Faculty of Science, King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia; (T.H.A.); (H.Y.Z.); (I.S.Y.); (H.H.H.); (M.S.)
| | - Santiyagu Valarasu
- PG and Research Department of Physics, Arul Anandar College, Madurai 625514, India;
| | - Medhat A. Ibrahim
- Nanotechnology Research Centre (NTRC), The British University in Egypt (BUE), Suez Desert Road, El-Sherouk City, Cairo 11837, Egypt;
- Molecular Spectroscopy and Modeling Unit, Spectroscopy Department, National Research Centre, 33 El-Bohouth Street, Giza 12622, Egypt
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