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Tummino ML, Peila R, Tonetti C, Velić N, Stjepanović M. Towards zero-waste processes: Waste wool derivatives as phosphate adsorbents and auxiliaries for textiles' natural dyeing. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024:10.1007/s11356-024-34395-3. [PMID: 39046637 DOI: 10.1007/s11356-024-34395-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2024] [Accepted: 07/11/2024] [Indexed: 07/25/2024]
Abstract
The textile industry is a pillar of the manufacturing sector worldwide, but it still represents a significantly polluting production sector since it is energy-, water- and natural resource-intensive. Herein, waste wool that did not meet the technical requirements to be used for yarns and fabrics was recovered first to prepare materials for wastewater remediation, specifically for phosphate removal. The wool underwent an alkaline treatment, eventually saturated with FeCl3 and then left at room temperature or thermally treated to induce crosslinking/stabilisation, obtaining adsorbent panels. The main characterisation findings concerned the impact of alkaline treatment on morphology and structure; additionally, the samples with iron displayed a behaviour attributable to a crosslinking effect operated by Fe3+. Batch experiments showed that only samples with iron were efficient in phosphate adsorption, with a high removal percentage obtained in a wide pH range. Adsorption isotherms and kinetics were investigated, suggesting a complex system of interactions. Moreover, during the alkaline treatment necessary to prepare such wool-derived adsorbent panels, a significant amount of wool hydrolysates left in the solution was produced. These substances, in view of zero-waste procedures, were isolated and re-employed as dyeing auxiliaries. Preliminary results demonstrated that the wool hydrolysates enabled the dyeing of cotton with natural dyes, which is generally a tricky process.
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Affiliation(s)
- Maria Laura Tummino
- Institute of Intelligent Industrial Technologies and Systems for Advanced Manufacturing (STIIMA), National Research Council of Italy (CNR), Corso Giuseppe Pella 16, 13900, Biella, Italy
| | - Roberta Peila
- Institute of Intelligent Industrial Technologies and Systems for Advanced Manufacturing (STIIMA), National Research Council of Italy (CNR), Corso Giuseppe Pella 16, 13900, Biella, Italy
| | - Cinzia Tonetti
- Institute of Intelligent Industrial Technologies and Systems for Advanced Manufacturing (STIIMA), National Research Council of Italy (CNR), Corso Giuseppe Pella 16, 13900, Biella, Italy
| | - Natalija Velić
- Faculty of Food Technology Osijek, Josip Juraj Strossmayer University of Osijek, Franje Kuhača 18, 31000, Osijek, Croatia
| | - Marija Stjepanović
- Faculty of Food Technology Osijek, Josip Juraj Strossmayer University of Osijek, Franje Kuhača 18, 31000, Osijek, Croatia.
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2
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Xue Y, Ma L, Han Z, Liu J, Wang Z, Liu P, Zhang Y, Dong H. Physical Properties of CaTiO 3-Modified NaNbO 3 Thin Films. NANOMATERIALS (BASEL, SWITZERLAND) 2024; 14:1186. [PMID: 39057863 PMCID: PMC11280364 DOI: 10.3390/nano14141186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2024] [Revised: 07/06/2024] [Accepted: 07/10/2024] [Indexed: 07/28/2024]
Abstract
NaNbO3(NN)-based lead-free materials are attracting widespread attention due to their environment-friendly and complex phase transitions, which can satisfy the miniaturization and integration for future electronic components. However, NN materials usually have large remanent polarization and obvious hysteresis, which are not conducive to energy storage. In this work, we investigated the effect of introducing CaTiO3((1-x)NaNbO3-xCaTiO3) on the physical properties of NN. The results indicated that as x increased, the surface topography, oxygen vacancy and dielectric loss of the thin films were significantly improved when optimal value was achieved at x = 0.1. Moreover, the 0.9NN-0.1CT thin film shows reversible polarization domain structures and well-established piezoresponse hysteresis loops. These results indicate that our thin films have potential application in future advanced pulsed power electronics.
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Affiliation(s)
- Yongmei Xue
- Department of Physics, Changzhi University, Changzhi 046011, China; (Y.X.); (L.M.); (J.L.); (Z.W.)
| | - Li Ma
- Department of Physics, Changzhi University, Changzhi 046011, China; (Y.X.); (L.M.); (J.L.); (Z.W.)
| | - Zhuokun Han
- School of Science and Technology, Northwestern Polytechnical University, Xi’an 710072, China;
| | - Jianwei Liu
- Department of Physics, Changzhi University, Changzhi 046011, China; (Y.X.); (L.M.); (J.L.); (Z.W.)
| | - Zejun Wang
- Department of Physics, Changzhi University, Changzhi 046011, China; (Y.X.); (L.M.); (J.L.); (Z.W.)
| | - Pengcheng Liu
- Research Institute of Opto-Mechatronics Industry, Jincheng 048000, China
| | - Yu Zhang
- Shanxi Key Laboratory of Advanced Semiconductor Optoelectronic Devices and Integrated Systems, Jincheng 048000, China;
| | - Huijuan Dong
- Department of Physics, Changzhi University, Changzhi 046011, China; (Y.X.); (L.M.); (J.L.); (Z.W.)
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3
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Imran M, Raza M, Noor H, Faraz SM, Raza A, Farooq U, Khan ME, Ali SK, Bakather OY, Ali W, Bashiri AH, Zakri W. Insight into mechanism of excellent visible-light photocatalytic activity of CuO/MgO/ZnO nanocomposite for advanced solution of environmental remediation. CHEMOSPHERE 2024; 359:142224. [PMID: 38723693 DOI: 10.1016/j.chemosphere.2024.142224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Revised: 04/26/2024] [Accepted: 04/30/2024] [Indexed: 05/16/2024]
Abstract
Environmental remediation has sought several innovative ways for the treatment of wastewater and captivated researchers around the globe towards it. Through this study, we aim to proceed with the efforts to foster sustainable and feasible ways for the treatment of wastewater. In this work, we report the sol-gel synthesis of CuO/MgO/ZnO nanocomposite and carry out their systematic characterization with the help of state-of-the-art analytical techniques, such as FTIR, SEM, TEM, PL, XRD, Raman, and AFM. The SEM along with TEM and AFM provided useful insights into the surface morphology of the synthesized nanocomposite on both 2D and 3D surfaces and concluded the well-dispersed behavior of the nanocomposite. The characteristic functional groups responsible for carrying out the reaction of Cu-O, Mg-O, and Zn-O were identified by FTIR spectroscopy. On the other hand, crystal size, dislocation density, and microstrain of the nanocomposite were calculated by XRD. For optical studies, photoluminescence spectroscopy was performed. Once the characterization of the nanocomposite was done, they were eventually treated against the toxic organic dye, methylene blue. The calculated rate constant values of k for CuO was 2.48 × 10-3 min-1, for CuO/MgO (2.04 × 10-3 min-1), for CuO/ZnO (1.82 × 10-3 min-1) and CuO/MgO/ZnO was found to be 2.00 × 10-3 min-1. It has become increasingly evident that nanotechnology can be used in various facets of modern life, and its implementation in wastewater treatment has recently received much attention.
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Affiliation(s)
- Muhammad Imran
- Centre of Excellence in Solid State Physics, University of Punjab, Lahore, 54590, Pakistan
| | - Mohsin Raza
- Additive Manufacturing Institute, Shenzhen University, Shenzhen, 518060, People's Republic of China
| | - Hadia Noor
- Centre of Excellence in Solid State Physics, University of Punjab, Lahore, 54590, Pakistan
| | - Sadia Muniza Faraz
- Department of Electronic Engineering, NED University of Engineering & Technology, Karachi, 75270, Pakistan
| | - Ali Raza
- Centre of Excellence in Solid State Physics, University of Punjab, Lahore, 54590, Pakistan
| | - Umar Farooq
- Department of Chemistry, The Islamia University of Bahawalpur, Baghdad-ul-Jadeed Campus, Bahawalpur, 63100, Pakistan
| | - Mohammad Ehtisham Khan
- Department of Chemical Engineering Technology, College of Applied Industrial Technology, Jazan University, Jazan 45142, Saudi Arabia.
| | - Syed Kashif Ali
- Department of Physical Sciences, Chemistry Division, College of Science, Jazan University, P.O. Box. 114, Jazan 45142, Kingdom of Saudi Arabia; Nanotechnology Research Unit, College of Science, Jazan University, P.O. Box. 114, Jazan 45142, Kingdom of Saudi Arabia
| | - Omer Y Bakather
- Chemical Engineering Department, College of Engineering and Computer Sciences, Jazan University, Jazan 45142, Saudi Arabia
| | - Wahid Ali
- Department of Chemical Engineering Technology, College of Applied Industrial Technology, Jazan University, Jazan 45142, Saudi Arabia
| | - Abdullateef H Bashiri
- Department of Mechanical Engineering, College of Engineering, Jazan University, P. O. Box 114, Jazan 45142, Saudi Arabia
| | - Waleed Zakri
- Department of Mechanical Engineering, College of Engineering, Jazan University, P. O. Box 114, Jazan 45142, Saudi Arabia
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Zakeri F, Javid A, Orooji Y, Fazli A, Khataee A, Khataee A. Al-Ce co-doped BaTiO 3 nanofibers as a high-performance bifunctional electrochemical supercapacitor and water-splitting electrocatalyst. Sci Rep 2024; 14:9833. [PMID: 38684695 DOI: 10.1038/s41598-024-54561-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Accepted: 02/14/2024] [Indexed: 05/02/2024] Open
Abstract
Supercapacitors and water splitting cells have recently played a key role in offering green energy through converting renewable sources into electricity. Perovskite-type electrocatalysts such as BaTiO3, have been well-known for their ability to efficiently split water and serve as supercapacitors due to their high electrocatalytic activity. In this study, BaTiO3, Al-doped BaTiO3, Ce-doped BaTiO3, and Al-Ce co-doped BaTiO3 nanofibers were fabricated via a two-step hydrothermal method, which were then characterized and compared for their electrocatalytic performance. Based on the obtained results, Al-Ce co-doped BaTiO3 electrode exhibited a high capacitance of 224.18 Fg-1 at a scan rate of 10 mVs-1, high durability during over the 1000 CV cycles and 2000 charge-discharge cycles, proving effective energy storage properties. Additionally, the onset potentials for OER and HER processes were 11 and - 174 mV vs. RHE, respectively, demonstrating the high activity of the Al-Ce co-doped BaTiO3 electrode. Moreover, in overall water splitting, the amount of the overpotential was 0.820 mV at 10 mAcm-2, which confirmed the excellent efficiency of the electrode. Hence, the remarkable electrocatalytic performance of the Al-Ce co-doped BaTiO3 electrode make it a promising candidate for renewable energy technologies owing to its high conductivity and fast charge transfer.
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Affiliation(s)
- Fatemeh Zakeri
- College of Materials Science and Engineering, Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, No. 159, Longpan Road, Nanjing, 210037, Jiangsu, China
- Research Laboratory of Advanced Water and Wastewater Treatment Processes, Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, 51666-16471, Iran
| | - Abbas Javid
- Research Laboratory of Advanced Water and Wastewater Treatment Processes, Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, 51666-16471, Iran
| | - Yasin Orooji
- College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua, 321004, China.
| | - Arezou Fazli
- Smart Materials, Istituto Italiano di Tecnologia, via Morego 30, 16163, Genoa, Italy
| | - Amirreza Khataee
- Division of Applied Electrochemistry, Department of Chemical Engineering, KTH Royal Institute of Technology, 100 44, Stockholm, Sweden
| | - Alireza Khataee
- Research Laboratory of Advanced Water and Wastewater Treatment Processes, Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, 51666-16471, Iran.
- Department of Chemical Engineering, Istanbul Technical University, Istanbul, 34469, Turkey.
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5
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Nain R, Dwivedi R. Photocatalytic activity in graded off-valent cations substituted NaNbO 3. Heliyon 2024; 10:e29121. [PMID: 38617944 PMCID: PMC11015406 DOI: 10.1016/j.heliyon.2024.e29121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2024] [Revised: 03/29/2024] [Accepted: 04/01/2024] [Indexed: 04/16/2024] Open
Abstract
This study investigates the impact of off-valent doping on the photocatalytic properties of NaNbO3 concerning the degradation of Methylene Blue. Compositions with x values of 0.00 (representing pure NaNbO3, denoted as NBO) and 0.05 within the material system Na1-xAxNbO3 (where A is K1+, Ba2+, La3+, abbreviated as K-NBO, Ba-NBO, and La-NBO respectively) were synthesized using the conventional solid-state reaction method. The UV-visible analysis revealed a decrease in the band gap for samples K-NBO and Ba-NBO, while an increase was observed for sample La-NBO. Raman modes of lower wave numbers merged and shifted towards the higher wave number side. The determination of valence band edge and conduction band edge involved computational analysis based on XPS survey scans, and the band gap energy values were derived from UV-Visible spectroscopy results. Examining the band diagram of the samples (NBO, K-NBO, Ba-NBO, and La-NBO) in conjunction with the highest occupied molecular orbital and lowest unoccupied molecular orbital levels of MB dye provided insights into potential degradation mechanisms. Photocatalytic dye degradation experiments for Methylene Blue demonstrated that doping increased the degradation efficiency of samples K-NBO, Ba-NBO, and La-NBO compared to NBO. Among all NaNbO3 based prepared samples, Ba-NBO exhibited the highest degradation efficiency of 96%, however slightly less than the reference sample P25 TiO2.
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Affiliation(s)
- Rajbala Nain
- Department of Physics and Materials Science and Engineering, Jaypee Institute of Information Technology, Noida, 201309, India
| | - R.K. Dwivedi
- Department of Physics and Materials Science and Engineering, Jaypee Institute of Information Technology, Noida, 201309, India
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6
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Fatima K, Asif M, Farooq U, Gilani SJ, Bin Jumah MN, Ahmed MM. Antioxidant and Anti-inflammatory Applications of Aerva persica Aqueous-Root Extract-Mediated Synthesis of ZnO Nanoparticles. ACS OMEGA 2024; 9:15882-15892. [PMID: 38617686 PMCID: PMC11007848 DOI: 10.1021/acsomega.3c08143] [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: 10/17/2023] [Revised: 03/13/2024] [Accepted: 03/18/2024] [Indexed: 04/16/2024]
Abstract
In the present study, ZnO nanoparticles were synthesized by using aqueous extracts of Aerva persica roots. Characterization of as-prepared ZnO nanoparticles was carried out using different techniques, including powder X-ray diffraction (XRD), UV-vis diffuse reflectance spectroscopy (DRS), Fourier transform infrared (FTIR) spectroscopy, field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM) and BET surface area analysis. Morphological analysis confirmed the small, aggregated flake-shaped morphology of as-synthesized ZnO nanostructures. The as-prepared ZnO nanoparticles were analyzed for their potential application as anti-inflammatory (using in vivo inhibition of carrageenan induced paw edema) and antioxidant (using in vitro radical scavenging activity) agents. The ZnO nanoparticles were found to have a potent antioxidant and anti-inflammatory activity comparable to that of standard ascorbic acid (antioxidant) and indomethacin (anti-inflammatory drug). Therefore, due to their ecofriendly synthesis, nontoxicity, and biocompatible nature, zinc oxide nanoparticles synthesized successfully from roots extract of the plant Aerva persica with potent efficiencies can be utilized for different biomedical applications.
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Affiliation(s)
- Kaneez Fatima
- Faculty
of Pharmacy, Maulana Azad University, Bujhawad, Teh: Luni, Jodhpur 342802, Rajasthan, India
- INTI
International University, Persiaran Perdana BBN, Putra Nilai, 71800 Nilai, Negeri Sembilan, Malaysia
| | - Mohammad Asif
- Faculty
of Pharmacy, Lachoo Memorial College of
Science and Technology, Shastri Nagar, Sector A, Jodhpur 342001, Rajasthan, India
| | - Umar Farooq
- Chemistry
Department, School of Basic Sciences, Galgotias
University, Greater
Noida 201309, India
| | - Sadaf Jamal Gilani
- Department
of Basic Health Sciences, Foundation Year, Princess Nourah bint Abdulrahman University, Riyadh 11671, Saudi Arabia
| | - May Nasser Bin Jumah
- Biology Department,
College of Science, Princess Nourah bint
Abdulrahman University, Riyadh 11671, Saudi Arabia
- Environment
and Biomaterial Unit, Health Sciences Research Center, Princess Nourah bint Abdulrahman University, Riyadh 11671, Saudi Arabia
- Saudi
Society for Applied Science, Princess Nourah
bint Abdulrahman University, Riyadh 11671, Saudi Arabia
| | - Mohammed Muqtader Ahmed
- Department
of Pharmaceutics, College of Pharmacy, Prince
Sattam Bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia
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7
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Wang R, Reddy CV, Nagar A, Basu S, Shetti NP, Cheolho B, Shim J, Kakarla RR. 2D g-C 3N 4 nanosheets functionalized with nickel-doped ZrO 2 nanoparticles for synergistic photodegradation of toxic chemical pollutants. CHEMOSPHERE 2023; 341:139955. [PMID: 37652247 DOI: 10.1016/j.chemosphere.2023.139955] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2023] [Revised: 08/10/2023] [Accepted: 08/22/2023] [Indexed: 09/02/2023]
Abstract
The photocatalytic removal of toxic chemical pollutants from wastewater has garnered significant attention in recent times owing to its notable removal efficiency, cost-effectiveness, and eco-friendly characteristics. Nonetheless, this catalytic process necessitates augmented charge separation and distinctive interface properties to facilitate catalytic reactions for water treatment applications. Therefore, in the current study, novel g-C3N4/Ni-doped ZrO2 heterostructured hybrid catalysts have been synthesized via a hydrothermal approach. Microscopic studies reveal that ZrO2 nanospheres were distributed on the layered-like 2D structure of g-C3N4 nanosheets. Electrochemical impedance spectroscopy (EIS), X-ray photoelectron spectroscopy (XPS), UV-Vis diffuse reflectance spectroscopy (UV-DRS), and photoluminescence (PL) characterizations were employed to investigate the impact of bandgap, electron-hole recombination, charge transfer, and interface properties on the catalytic performance of g-C3N4/ZrO2 hybrids. XRD analysis confirmed that the Ni-ions do not disturb the host lattice crystal structure and heterostructure development between g-C3N4 and doped ZrO2 sample. Structurally, Ni-doped nanoparticles were found to be equally superficially dispersed on g-C3N4 sheets. Optical analysis results suggest that the hybrid catalyst possesses a narrow bandgap of 2.56 eV. The synthesized photocatalyst degraded rhodamine B (RhB) and tetracycline (TC) with ∼92% and ∼89% degradation efficiency, respectively. Heterostructured hybrid catalysts showed superior degradation rate constants than other catalysts. This might be attributed to the sufficient separation of electron-hole due to the development of a heterojunction. The radical scavenging experiments suggested that O2●- and ●OH radicals contributed substantially to the dye elimination activity of the composite. Therefore, the synthesized novel nanohybrid catalysts in this study present an efficient and straightforward synthesis method for the efficient removal of toxins from wastewater under visible light irradiation.
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Affiliation(s)
- Rui Wang
- School of Mechanical Engineering, Yeungnam University, Gyeongsan buk-do, 38541, South Korea
| | - Ch Venkata Reddy
- School of Mechanical Engineering, Yeungnam University, Gyeongsan buk-do, 38541, South Korea.
| | - Aashna Nagar
- School of Chemistry and Biochemistry, Thapar Institute of Engineering & Technology, Patiala, 147004, India
| | - Soumen Basu
- School of Chemistry and Biochemistry, Thapar Institute of Engineering & Technology, Patiala, 147004, India; Affiliate Faculty-TIET-Virginia Tech Center of Excellence in Emerging Materials, Thapar Institute of Engineering and Technology, Patiala, 147004, India
| | - Nagaraj P Shetti
- Department of Chemistry, School of Advanced Sciences, KLE Technological University, Vidyanagar, Hubballi, 580 031, Karnataka, India
| | - Bai Cheolho
- School of Mechanical Engineering, Yeungnam University, Gyeongsan buk-do, 38541, South Korea.
| | - Jaesool Shim
- School of Mechanical Engineering, Yeungnam University, Gyeongsan buk-do, 38541, South Korea.
| | - Raghava Reddy Kakarla
- School of Chemical and Biomolecular Engineering, The University of Sydney, Sydney, NSW 2006, Australia.
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Nascimento JFDL, Nobre FX, Batista FMC, Cabot A, Vendrell X, Mestres L, da Cunha Mendes O, Ferreira RD, Leyet Ruiz Y, Quaresma JNN. Synthesis of CaNb 2O 6 with a Rynersonite-like Structure: Morphology, Rietveld Refinement, Optical, and Vibrational Properties. Inorg Chem 2023; 62:16323-16328. [PMID: 37755155 DOI: 10.1021/acs.inorgchem.3c01311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/28/2023]
Abstract
In this study, we report the easy and low-cost synthesis of calcium niobate (CaNb2O6) with the isomorphic structure of the Rynersonite mineral for CaTa2O6. The samples were prepared by the ball milling method at room temperature at a synthesis time of 0.5, 1, 2, 3, and 4 h. The structural analysis by XRD, Rietveld refinement, and vibrational Raman spectroscopy confirms all diffraction peaks and active mode characteristics of the pure phase of CaNb2O6 for the 3-h and 4-h samples, with a crystallite size of 22.5 and 23.2 nm, respectively. The optical band gap obtained was 3.18(2) eV (3-h sample), lower than the optical band gap for niobium oxide, characteristic of materials with strong photon absorption in the UVA region of the spectrum. The surface analysis by scanning electron microscopy reveals the obtention of several agglomerates of irregular particles ranging in the submicro and micro scales. Therefore, the present approach successfully obtained calcium niobate with the formula CaNb2O6 at a short synthesis time and room temperature.
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Affiliation(s)
- José Fábio de Lima Nascimento
- Graduate Program in Natural Resources Engineering in the Amazon, PRODERNA/ITEC/UFPA, Federal University of Pará, Campus Universitário do Guamá, Rua Augusto Corrêa, 01, Belém, Pará 66075-110, Brazil
| | - Francisco Xavier Nobre
- Federal Institute of Education, Science and Technology of Amazonas, Campus Manaus Centro, Rua Sete de Setembro, 1975, Centro, Manaus, Amazonas 69020-120, Brazil
- Programa de Pós-Graduação em Química, Universidade Federal do Piauí, Campus Ministro Petrônio Portella, Centro de Ciências da Natureza, Ininga, Piauí 64049-550, Brazil
- Programa Multicêntrico de Pós-Graduação em Bioquímica e Biologia Molecular, Universidade do Estado do Amazonas, Escola Superior de Saúde, Av. Carvalho Leal, 1777, Cachoeirinha, Manaus, Amazonas 69065-001, Brazil
| | - Francisco Marcos Costa Batista
- Catalonia Institute for Energy Research - IREC, Sant Adrià de Besòs, Barcelona 08930, Spain
- Department of Inorganic & Organic Chemistry, Universitat de Barcelona, 08028 Barcelona, Spain
| | - Andreu Cabot
- Catalonia Institute for Energy Research - IREC, Sant Adrià de Besòs, Barcelona 08930, Spain
- ICREA, Pg. Lluís Companys 23, Barcelona 08010, Spain
| | - Xavier Vendrell
- Department of Inorganic & Organic Chemistry, Universitat de Barcelona, 08028 Barcelona, Spain
| | - Lourdes Mestres
- Department of Inorganic & Organic Chemistry, Universitat de Barcelona, 08028 Barcelona, Spain
| | - Otoniel da Cunha Mendes
- FENTOMLAB, Universidade do Estado do Amazonas, Escola Superior de Tecnologia, Av. Darcy Vagas, 1200, Parque Dez de Novembro, Manaus, Amazonas 69050-020, Brazil
| | - Robson Dantas Ferreira
- Laboratório de Microscopia e Nanotecnologia, Instituto Nacional de Pesquisas da Amazônia, Av. André Araújo, 2936, Aleixo 69060-001, Brazil
| | - Yurimiler Leyet Ruiz
- Departamento de Engenharia de Materiais, Laboratório de Processamento de Materiais Tecnológicos (LPMaT), Universidade Federal do Amazonas, Instituto de Ciências Exatas, Rua Av. General Rodrigo Otávio Jordão Ramos, 1200, Coroado I, Manaus 69067-005, Brazil
| | - João Nazareno Nonato Quaresma
- Graduate Program in Natural Resources Engineering in the Amazon, PRODERNA/ITEC/UFPA, Federal University of Pará, Campus Universitário do Guamá, Rua Augusto Corrêa, 01, Belém, Pará 66075-110, Brazil
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9
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Tehreem R, Awais M, Khursheed S, Rehman F, Hussain D, Mok YS, Siddiqui GU. Synthesis of efficient light harvesting Cr, N Co-doped TiO 2 nanoparticles for enhanced visible light photocatalytic degradation of xanthene dyes; eosin yellow and rose bengal. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:92621-92635. [PMID: 37493906 DOI: 10.1007/s11356-023-28701-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Accepted: 07/05/2023] [Indexed: 07/27/2023]
Abstract
To solve the problem of water pollution, using environment friendly and cost effective method in short time is the need of hour. In this work, chromium (Cr) and nitrogen (N) co-doped TiO2 nanoparticles were synthesized and were used for the photocatalytic degradation of dyes under visible light. The synergistic effect of metal and non-metal co-dopants added would result in appropriate reduction of band gap {from 3.2 eV of TiO2 to 2.67 eV}, decrease in recombination rate of charge carriers by trapping electrons and holes, and in better light harvesting capacity. Nanoparticles were synthesized by sol-gel method and characterized using ultraviolet-visible (UV-VIS) spectroscopy, fourier transform infrared (FTIR) spectroscopy, atomic force microscopy (AFM), zeta potential, X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET) analysis, field emission scanning electron microscopy (FE-SEM), and RAMAN spectroscopy. Eosin yellow (EY) and rose bengal (RB) were subjected to photocatalytic degradation under solar light to check the photocatalytic activity of the synthesized nanoparticles. Effects of dye concentration, the concentration of nanoparticles, time, and pH were investigated to optimize the parameters. The results obtained were remarkable for 20 ppm EY solution took 10 min using 1 gL-1 NPs at pH 3 and 10 ppm RB solution took 5 min using 0.75 gL-1 NPs at pH 5.78 (original pH) for complete degradation. Kinetics studies were also performed and both dyes followed pseudo-second-order kinetics with R2 values 0.99312 and 0.99712 for EY and RB, respectively. The study of degraded products was conducted using high-performance liquid chromatography (HPLC) hyphenated with electron spray ionization mass spectroscopy (ESI-MS) (LC-MS) and possible degradation pathways were made for both dyes. A reusability test was also performed showing the efficiency of the particles was up to 88% after 3 cycles of use. These notable results can be attributed to the efficient removal of organic pollutants using the proposed dopants in this study.
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Affiliation(s)
- Rida Tehreem
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, Pakistan
| | - Muhammad Awais
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, Pakistan
| | - Sanya Khursheed
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, Pakistan
| | - Fahad Rehman
- Biorefinery Engineering and Microfluidics (BEAM) Lab, Microfluidics Research Group, Department of Chemical Engineering, COMSATS University Islamabad, Lahore Campus, Islamabad, Pakistan
| | - Dilshad Hussain
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, Pakistan
| | - Young Sun Mok
- Department of Chemical Engineering, Jeju National University, Jeju, 63243, Republic of Korea
| | - Ghayas Uddin Siddiqui
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, Pakistan.
- Department of Chemical Engineering, Jeju National University, Jeju, 63243, Republic of Korea.
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10
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Kotwal P, Jasrotia R, Prakash J, Ahmed J, Verma A, Verma R, Kandwal A, Godara SK, Kumari S, Maji PK, Fazil M, Ahmad T, Tamboli MS, Sharma N, Kumar R. Magnetically recoverable sol-gel auto-combustion developed Ni 1-xCu xDy yFe 2-yO 4 magnetic nanoparticles for photocatalytic, electrocatalytic, and antibacterial applications. ENVIRONMENTAL RESEARCH 2023; 231:116103. [PMID: 37178745 DOI: 10.1016/j.envres.2023.116103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 04/21/2023] [Accepted: 05/10/2023] [Indexed: 05/15/2023]
Abstract
Copper and dysprosium doped NiFe2O4 magnetic nanomaterials, Ni1-xCuxDyyFe2-yO4 (x = y = 0.00, 0.01, 0.02, 0.03), was prepared by utilizing sol-gel auto-combustion approach to inspect the photodegradation of methylene blue (MB) pollutant and also, to perform the electrocatalytic water splitting and antibacterial studies. The XRD analysis reveal the growth of a single-phase spinel cubic structure for produced nanomaterials. The magnetic traits show an increasing trend in saturation magnetization (Ms) from 40.71 to 47.90 emu/g along with a decreasing behaviour of coercivity from 158.09 to 142.31 Oe at lower and higher Cu and Dy doping content (x = 0.0-0.01). The study of optical band gap values of copper and dysprosium-doped nickel nanomaterials decreased from 1.71 to 1.52 eV. This will increase the photocatalytic degradation of methylene blue pollutant from 88.57% to 93.67% under natural sunlight, respectively. These findings clearly show that under natural sunlight irradiation for 60 min, the produced N4 photocatalyst displays the greatest photocatalytic activity with a maximum removal percentage of 93.67%. The electrocatalytic characteristics of produced magnetic nanomaterials for both HER and OER were examined with a Calomel electrode taking as a reference in a 0.5 N H2SO4 and 0.1 N KOH electrolyte. The N4 electrode demonstrated considerable 10 and 0.024 mA/cm2 of current density, with onset potentials of 0.99 and 1.5 V for HER and OER and also, have tafel slopes of 58.04 and 295 mV/dec, respectively. The antibacterial activity for produced magnetic nanomaterials was examined against various bacteria (Bacillus subtilis, Staphylococcus aureus, S. typhi, and P. aeruginosa) in which N3 sample produced significant inhibition zone against gram-positive bacteria (Bacillus subtilis and Staphylococcus aureus) but no zone of inhibition against gram-negative bacteria (S. typhi and P. aeruginosa). With all these superior traits, the produced magnetic nanomaterials are highly valuable for the wastewater remediation, hydrogen evolution, and biological applications.
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Affiliation(s)
- Pinki Kotwal
- School of Physics and Materials Science, Shoolini University, Bajhol, Solan, H.P., India
| | - Rohit Jasrotia
- School of Physics and Materials Science, Shoolini University, Bajhol, Solan, H.P., India; Himalayan Centre of Excellence in Nanotechnology, Shoolini University, Bajhol, Solan, H.P., India.
| | - Jyoti Prakash
- School of Physics and Materials Science, Shoolini University, Bajhol, Solan, H.P., India
| | - Jahangeer Ahmed
- Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia
| | - Ankit Verma
- Faculty of Science and Technology, ICFAI University, Baddi, H.P., India
| | - Ritesh Verma
- Department of Physics, Amity University, Haryana, 122413, Gurugram, India
| | - Abhishek Kandwal
- School of Physics and Materials Science, Shoolini University, Bajhol, Solan, H.P., India
| | - Sachin Kumar Godara
- Department of Apparel and Textile Technology, Guru Nanak Dev University, Amritsar, Punjab, India
| | - Swati Kumari
- Department of Biotechnology, Shoolini University, Bajhol, Solan, H.P., India
| | - Pradip K Maji
- Dept. of Polymer & Process Engineering, Indian Institute of Technology Roorkee, Saharanpur, Uttar Pradesh, 247001, India
| | - Mohd Fazil
- Nanochemistry Laboratory, Department of Chemistry, Jamia Millia Islamia, New Delhi, 110025, India
| | - Tokeer Ahmad
- Nanochemistry Laboratory, Department of Chemistry, Jamia Millia Islamia, New Delhi, 110025, India
| | - Mohaseen S Tamboli
- Korea Institute of Energy Technology (KENTECH), 200 Hyeokshin-ro, Naju, Jeollanam-do, 58330, Republic of Korea
| | - Naresh Sharma
- Govt. Degree College for Women, Kathua, J & K, India
| | - Rajesh Kumar
- Department of Physics, Faculty of Physical Sciences, Sardar Patel University, Mandi, HP, 175001, India.
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11
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Reddy CV, Nagar A, Shetti NP, Reddy IN, Basu S, Shim J, Kakarla RR. Novel g-C 3N 4/BiVO 4 heterostructured nanohybrids for high efficiency photocatalytic degradation of toxic chemical pollutants. CHEMOSPHERE 2023; 322:138146. [PMID: 36806805 DOI: 10.1016/j.chemosphere.2023.138146] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2022] [Revised: 01/07/2023] [Accepted: 02/12/2023] [Indexed: 06/18/2023]
Abstract
Novel heterostructured hybrid catalysts are essential for the efficient photocatalytic removal of organic pollutants from wastewater generated by the pharmaceutical and textile industries. In this study, novel g-C3N4/BiVO4 nanohybrid catalysts were prepared using a solvothermal technique, and examined their structural and optical properties using different characterizations. The X-ray diffraction analysis confirmed the monoclinic crystal phase of BiVO4. Field emission scanning electron microscopy (FESEM) images revealed that g-C3N4 sheets anchored on the surface of BiVO4 nanospheres. X-ray photoelectron spectroscopy (XPS) analysis confirmed the oxidation states of g-C3N4/BiVO4 composite sample. UV-Vis DRS spectroscopy analysis revealed that the composite (2.08 eV) sample had a reduced bandgap compared to other samples. The photocatalytic properties of the prepared samples were tested in the presence of organic methylene blue (MB) and antibiotic tetracycline (TC) pollutants under visible light illumination. The hybrid composite catalyst exhibited enhanced photocatalytic degradation efficiency of MB (88%) and TC (89%) pollutants at elevated rate constants of 0.0128 and 0.01174 min-1, respectively. The improved catalytic performance of the composite catalyst is due to the heterojunctions between g-C3N4 and BiVO4 that successfully reduced the rate of charge carrier recombination in the catalyst system. Scavenger experiments revealed that O2●- and h+ radicals played a main role in the degradation of the chemical pollutants. The developed g-C3N4/BiVO4 heterostructured catalyst is a suitable candidate for removing contaminants from industrial wastewater because of its facile fabrication and exceptional photocatalytic activity under visible light irradiation.
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Affiliation(s)
- Ch Venkata Reddy
- School of Mechanical Engineering, Yeungnam University, Gyeongsan, 712-749, South Korea
| | - Aashna Nagar
- School of Chemistry and Biochemistry, Thapar Institute of Engineering & Technology, Patiala, 147004, India
| | - Nagaraj P Shetti
- Department of Chemistry, School of Advanced Sciences, KLE Technological University, Vidyanagar, Hubballi, 580 031, Karnataka, India
| | - I Neelakanta Reddy
- School of Mechanical Engineering, Yeungnam University, Gyeongsan, 712-749, South Korea
| | - Soumen Basu
- School of Chemistry and Biochemistry, Thapar Institute of Engineering & Technology, Patiala, 147004, India; Affiliate Faculty-TIET-Virginia Tech Center of Excellence in Emerging Materials, Thapar Institute of Engineering and Technology, Patiala, 147004, India
| | - Jaesool Shim
- School of Mechanical Engineering, Yeungnam University, Gyeongsan, 712-749, South Korea.
| | - Raghava Reddy Kakarla
- School of Chemical and Biomolecular Engineering, The University of Sydney, Sydney, NSW 2006, Australia.
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12
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Ali SA, Sadiq I, Ahmad T. Oxide based Heterostructured Photocatalysts for CO
2
Reduction and Hydrogen Generation. ChemistrySelect 2023. [DOI: 10.1002/slct.202203176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
Affiliation(s)
- Syed Asim Ali
- Nanochemistry Laboratory Department of Chemistry, Jamia Millia Islamia New Delhi 110025 India
| | - Iqra Sadiq
- Nanochemistry Laboratory Department of Chemistry, Jamia Millia Islamia New Delhi 110025 India
| | - Tokeer Ahmad
- Nanochemistry Laboratory Department of Chemistry, Jamia Millia Islamia New Delhi 110025 India
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13
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Ni5P4-NiP2-Ni2P Nanocomposites Tangled with N-Doped Carbon for Enhanced Electrochemical Hydrogen Evolution in Acidic and Alkaline Solutions. Catalysts 2022. [DOI: 10.3390/catal12121650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Heterostructured non-precious metal phosphides have attracted increasing attention in the development of high-performance catalysts for hydrogen evolution reaction (HER), particularly in acidic media. Herein, a catalyst composed of ternary Ni5P4-NiP2-Ni2P nanocomposites and N-doped carbon nanotubes/carbon particulates (Ni5P4-NiP2-Ni2P/NC) was prepared from a Ni-containing hybrid precursor through approaches of a successive carbonization and phosphating reaction. Benefiting from the synergistic effect from three-component nickel phosphides and the support role of porous carbon network, the Ni5P4-NiP2-Ni2P/N-doped carbon catalyst presents the promising HER performance with overpotentials of 168 and 202 mV at the current density of 10 mA cm−2 and Tafel slopes of 69.0 and 74 mV dec−1 in both acidic and alkaline solutions, respectively, which surpasses the Ni2P/N-doped carbon counterpart. This work provides an effective strategy for the preparation and development of highly efficient HER non-precious metal electrocatalysts by creating heterostructure in acidic and alkaline media.
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14
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Gadtya AS, Tripathy D, Moharana S. Preparation of novel PMMA-NaNbO3-carbon quantum dot composite films for studies of dielectric properties and a.c. conductivity studies. Polym Bull (Berl) 2022. [DOI: 10.1007/s00289-022-04591-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
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15
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Pandit NA, Ahmad T. Tin Oxide Based Hybrid Nanostructures for Efficient Gas Sensing. Molecules 2022; 27:7038. [PMID: 36296632 PMCID: PMC9607226 DOI: 10.3390/molecules27207038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Revised: 10/10/2022] [Accepted: 10/14/2022] [Indexed: 11/17/2022] Open
Abstract
Tin oxide as a semiconductor metal oxide has revealed great potential in the field of gas sensing due to its porous structure and reduced size. Especially for tin oxide and its composites, inherent properties such as high surface areas and their unique semiconducting properties with tunable band gaps make them compelling for sensing applications. In combination with the general benefits of metal oxide nanomaterials, the incorporation of metal oxides into metal oxide nanoparticles is a new approach that has dramatically improved the sensing performance of these materials due to the synergistic effects. This review aims to comprehend the sensing mechanisms and the synergistic effects of tin oxide and its composites in achieving high selectivity, high sensitivity and rapid response speed which will be addressed with a full summary. The review further vehemently highlights the advances in tin oxide and its composites in the gas sensing field. Further, the structural components, structural features and surface chemistry involved in the gas sensing are also explained. In addition, this review discusses the SnO2 metal oxide and its composites and unravels the complications in achieving high selectivity, high sensitivity and rapid response speed. The review begins with the gas sensing mechanisms, which are followed by the synthesis methods. Further key results and discussions of previous studies on tin metal oxide and its composites are also discussed. Moreover, achievements in recent research on tin oxide and its composites for sensor applications are then comprehensively compiled. Finally, the challenges and scope for future developments are discussed.
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Affiliation(s)
| | - Tokeer Ahmad
- Nanochemistry Laboratory, Department of Chemistry Jamia Millia Islamia, New Delhi 110025, India
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16
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Mehtab A, Banerjee S, Mao Y, Ahmad T. Type-II CuFe 2O 4/Graphitic Carbon Nitride Heterojunctions for High-Efficiency Photocatalytic and Electrocatalytic Hydrogen Generation. ACS APPLIED MATERIALS & INTERFACES 2022; 14:44317-44329. [PMID: 36136758 DOI: 10.1021/acsami.2c11140] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Solar water splitting has emerged as an urgent imperative as hydrogen emerges as an increasingly important form of energy storage. g-C3N4 is an ideal candidate for photocatalytic water splitting as a result of the excellent alignment of its band edges with water redox potentials. To mitigate electron-hole recombination that has limited the performance of g-C3N4, we have developed a semiconductor heterostructure of g-C3N4 with CuFe2O4 nanoparticles (NPs) as a highly efficient photocatalyst. Visible-light-driven photocatalytic properties of CuFe2O4/g-C3N4 heterostructures with different CuFe2O4 loadings have been examined with two sacrificial agents. An up to 2.5-fold enhancement in catalytic efficiency is observed for CuFe2O4/g-C3N4 heterostructures over g-C3N4 nanosheets alone with the apparent quantum yield of H2 production approaching 25%. The improved photocatalytic activity of the heterostructures suggests that introducing CuFe2O4 NPs provides more active sites and reduces electron-hole recombination. The g-C3N4/CuFe2O4 heterostructures furthermore show enhanced electrocatalytic HER activity as compared to the individual components as a result of which by making heterostructures g-C3N4 with CuFe2O4 increased the active catalytic surface for the electrocatalytic water splitting reaction. The enhanced faradaic efficiency of the prepared heterostructures makes it a potential candidate for efficient hydrogen generation. Nevertheless, the designed heterostructure materials exhibited significant photo- and electrocatalytic activity toward the HER, which demonstrates a method for methodically enhancing catalytic performance by creating heterostructures with the best energetic offsets.
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Affiliation(s)
- Amir Mehtab
- Nanochemistry Laboratory, Department of Chemistry, Jamia Millia Islamia, New Delhi 110025, India
- Department of Chemistry, Texas A&M University, College Station, Texas 77843-3255, United States
| | - Sarbajit Banerjee
- Department of Chemistry, Texas A&M University, College Station, Texas 77843-3255, United States
| | - Yuanbing Mao
- Department of Chemistry, Illinois Institute of Technology, 3105 South Dearborn Street, Chicago, Illinois 60616, United States
| | - Tokeer Ahmad
- Nanochemistry Laboratory, Department of Chemistry, Jamia Millia Islamia, New Delhi 110025, India
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17
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Lone I, Khan H, Jain AK, Ahmed J, Ramanujachary KV, Ahmad T. Metal-Organic Precursor Synthesis, Structural Characterization, and Multiferroic Properties of GdFeO 3 Nanoparticles. ACS OMEGA 2022; 7:33908-33915. [PMID: 36188241 PMCID: PMC9520543 DOI: 10.1021/acsomega.2c02809] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2022] [Accepted: 09/02/2022] [Indexed: 05/11/2023]
Abstract
GdFeO3 nanoparticles were fabricated by a facile metal-organic precursor method using citric acid as a complexing agent. The phase purity and structural analysis by powder X-ray diffraction and FTIR studies indicates that the material is highly crystalline with an orthorhombic structure. Electron microscopic (TEM and SEM) studies of rare earth ferrites reveal worm-shaped nanoparticles with an average grain size of 95 nm. The high-resolution TEM study provides an insightful image, which shows an interplanar spacing of approximately 0.12 nm that corresponds to the (112) crystalline plane. A high surface area of 231.5 m2 g-1 has been achieved with a mesoporous texture, which in turn gives a high dielectric constant. Well-defined hysteresis is obtained with a saturation magnetization of 17.5 emu g-1, remanent magnetization of 3.9 emu g-1, and coercive field of -446 Oe. Room-temperature ferroelectricity in GdFeO3 nanoparticles has been found for the first time with no leaky current and hence may be used in multistate memory devices.
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Affiliation(s)
- Irfan
H. Lone
- Nanochemistry
Laboratory, Department of Chemistry, Jamia
Millia Islamia, New Delhi 110025, India
- Department
of Chemistry, University of Kashmir, Hazratbal, Srinagar 190006, Jammu and Kashmir, India
| | - Huma Khan
- Nanochemistry
Laboratory, Department of Chemistry, Jamia
Millia Islamia, New Delhi 110025, India
| | - Arvind K. Jain
- School
of Basic and Applied Sciences, Galgotias
University, Greater
Noida 201306, UP, India
| | - Jahangeer Ahmed
- Department
of Chemistry, College of Science, King Saud
University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Kandalam V. Ramanujachary
- Department
of Chemistry and Biochemistry, Rowan University, Glassboro, New Jersey 08028, United States
| | - Tokeer Ahmad
- Nanochemistry
Laboratory, Department of Chemistry, Jamia
Millia Islamia, New Delhi 110025, India
- . Phone: 91-11-26981717,
extension: 3261
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18
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Lone IH, Khan H, Wani IA, Jain AK, Ahmad T. Magnetic, Electrical and Humidity Sensing Properties of Multiferroic GdCrO
3
Nanoparticles Fabricated by Metal Organic Precursor Method. ChemistrySelect 2022. [DOI: 10.1002/slct.202202547] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Irfan H. Lone
- Nanochemistry Laboratory Department of Chemistry Jamia Millia Islamia New Delhi 110025 India
- Department of Chemistry University of Kashmir, Hazratbal Srinagar 190006 Jammu & Kashmir India
| | - Huma Khan
- Nanochemistry Laboratory Department of Chemistry Jamia Millia Islamia New Delhi 110025 India
| | - Irshad A. Wani
- PG Department of Chemistry Govt. Postgraduate Degree College Bhadarwah University of Jammu Jammu & Kashmir 182222 Jammu India
| | - Arvind Kumar Jain
- School of Basic and Applied Sciences Galgotias University Greater Noida 201306, UP India
| | - Tokeer Ahmad
- Nanochemistry Laboratory Department of Chemistry Jamia Millia Islamia New Delhi 110025 India
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19
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Naaz F, Sharma A, Shahazad M, Ahmad T. Hydrothermally Derived Hierarchical CuO Nanoflowers as an Efficient Photocatalyst and Electrocatalyst for Hydrogen Evolution. ChemistrySelect 2022. [DOI: 10.1002/slct.202201800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Farha Naaz
- Nanochemistry Laboratory, Department of Chemistry Jamia Millia Islamia New Delhi 110025 India
| | - Akanksha Sharma
- Nanochemistry Laboratory, Department of Chemistry Jamia Millia Islamia New Delhi 110025 India
| | - Mohd Shahazad
- Nanochemistry Laboratory, Department of Chemistry Jamia Millia Islamia New Delhi 110025 India
- Department of Chemistry Bhakt Darshan Government Post Graduate College, Jaiharikhal 246193, District Pauri Gharwal Uttrakhand India
| | - Tokeer Ahmad
- Nanochemistry Laboratory, Department of Chemistry Jamia Millia Islamia New Delhi 110025 India
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20
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Jain SK, Pandit NA, Fazil M, Ali SA, Ahmed J, Alshehri SM, Mao Y, Ahmad T. Chemical fabrication, structural characterization and photocatalytic water splitting application of Sr-doped SnO 2nanoparticles. NANOTECHNOLOGY 2022; 33:355706. [PMID: 35580560 DOI: 10.1088/1361-6528/ac705a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Accepted: 05/17/2022] [Indexed: 06/15/2023]
Abstract
Semiconductor photocatalysis has gained considerable attention in recent years due to their enabling nature to convert solar energy into fuels of renewable hydrocarbon. However, many of them suffer from some drawbacks like the inability to visible light irradiation and wide band gaps. Herein, we have synthesized monophasic strontium (Sr) doped SnO2nanoparticles by a cost-effective and environmental friendly hydrothermal method. As-synthesized nanoparticles showed rutile crystalline structure with irregular and rough cubical shape and no other elemental impurities. Sr-doped SnO2nanoparticles show a constant decrease in bandgap with increasing dopant concentration, which is estimated for excellent photocatalytic activity. The photocatalytic water splitting of as-prepared Sr-doped SnO2nanoparticles for H2generation shows a large influence of the increasing dopant concentration related to the narrowing bandgap on H2generation rate. Hence, the tunable bandgap with adjusted dopant concentration indicates that band gap tuning through doping for produced nanostructures may open up a new opportunities for photocatalytic and other optoelectronic applications.
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Affiliation(s)
- Sapan K Jain
- Nanochemistry Laboratory, Department of Chemistry, Jamia Millia Islamia, New Delhi-110025, India
| | - Nayeem Ahmad Pandit
- Nanochemistry Laboratory, Department of Chemistry, Jamia Millia Islamia, New Delhi-110025, India
| | - Mohd Fazil
- Nanochemistry Laboratory, Department of Chemistry, Jamia Millia Islamia, New Delhi-110025, India
| | - Syed Asim Ali
- Nanochemistry Laboratory, Department of Chemistry, Jamia Millia Islamia, New Delhi-110025, India
| | - Jahangeer Ahmed
- Department of Chemistry, College of Science, King Saud University, PO Box 2455, Riyadh 11451, Saudi Arabia
| | - Saad M Alshehri
- Department of Chemistry, College of Science, King Saud University, PO Box 2455, Riyadh 11451, Saudi Arabia
| | - Yuanbing Mao
- Department of Chemistry, Illinois Institute of Technology, 3105 South Dearborn Street, Chicago, IL 60616, United States of America
| | - Tokeer Ahmad
- Nanochemistry Laboratory, Department of Chemistry, Jamia Millia Islamia, New Delhi-110025, India
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21
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Farooq U, Ahmed J, Alshehri SM, Mao Y, Ahmad T. Self-Assembled Interwoven Nanohierarchitectures of NaNbO 3 and NaNb 1-x Ta x O 3 (0.05 ≤ x ≤ 0.20): Synthesis, Structural Characterization, Photocatalytic Applications, and Dielectric Properties. ACS OMEGA 2022; 7:16952-16967. [PMID: 35647422 PMCID: PMC9134429 DOI: 10.1021/acsomega.1c07250] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Accepted: 04/21/2022] [Indexed: 06/15/2023]
Abstract
Dependence on fossil fuels for energy purposes leads to the global energy crises due to the nonrenewable nature and high CO2 production for environmental pollution. Therefore, new ways of nanocatalysis for environmental remediation and sustainable energy resources are being explored. Herein, we report a facile surfactant free, low temperature, and environmentally benign hydrothermal route for development of pure and (5, 10, 15, and 20 mol %) Ta-doped horizontally and vertically interwoven NaNbO3 nanohierarchitecture photocatalysts. To the best of our knowledge, such a type of hierarchical structure of NaNbO3 has never been reported before, and changes in the microstructure of these nanoarchitectures on Ta-doping has also been examined for the first time. As-synthesized nanostructures were characterized by different techniques including X-ray diffraction analysis, electron microscopic studies, X-ray photoelectron spectroscopic studies, etc. Ta-doping considerably affects the microstructure of the nanohierarchitectures of NaNbO3, which was analyzed by FESEM analysis. The UV-visible diffused reflectance spectroscopy study shows considerable change in the band gap of as-synthesized nanostructures and was found to be ranging from 2.8 to 3.5 eV in pure and different mole % Ta-doped NaNbO3. With an increase in dopant concentration, the surface area increases and was equal to 5.8, 6.8, 7.0, 9.2, and 9.7 m2/g for pure and 5, 10, 15, and 20 mol % Ta-doped NaNbO3, respectively. Photocatalytic activity toward the degradation of methylene blue dye and H2 evolution reaction shows the highest activity (89% dye removal and 21.4 mmol g-1 catalyst H2 evolution) for the 10 mol % NaNbO3 nanostructure which was attributed to a change in the conduction band maximum of the material. At 100 °C and 500 kHz, the dielectric constants of pure and 5, 10, 15, and 20 mol % Ta-doped NaNbO3 were found to be 111, 510, 491, 488, and 187, respectively. The current study provides the rational insight into the design of nanohierarchitectures and how microstructure affects different properties of the material upon doping.
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Affiliation(s)
- Umar Farooq
- Nanochemistry
Laboratory, Department of Chemistry, Jamia
Millia Islamia, New Delhi 110025, India
| | - Jahangeer Ahmed
- Department
of Chemistry, College of Science, King Saud
University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Saad M. Alshehri
- Department
of Chemistry, College of Science, King Saud
University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Yuanbing Mao
- Department
of Chemistry, Illinois Institute of Technology, 3105 South Dearborn Street, Chicago, Illinois 60616, United States
| | - Tokeer Ahmad
- Nanochemistry
Laboratory, Department of Chemistry, Jamia
Millia Islamia, New Delhi 110025, India
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22
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Jain S, Fazil M, Pandit NA, Ali SA, Naaz F, Khan H, Mehtab A, Ahmed J, Ahmad T. Modified, Solvothermally Derived Cr-doped SnO 2 Nanostructures for Enhanced Photocatalytic and Electrochemical Water-Splitting Applications. ACS OMEGA 2022; 7:14138-14147. [PMID: 35559165 PMCID: PMC9089340 DOI: 10.1021/acsomega.2c00707] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Accepted: 04/07/2022] [Indexed: 05/10/2023]
Abstract
Cr-doped SnO2 nanostructures with a dopant concentration ranging from 1 to 5% have been successfully prepared using low-temperature modified solvothermal synthesis. The as-prepared nanoparticles showed a rutile tetragonal structure with a rough undefined morphology having no other elemental impurities. The particle shape and size, band gap, and specific surface area of the samples were investigated by scanning electron microscopy, transmission electron microscopy (TEM), high-resolution TEM, UV-visible diffused reflectance spectroscopy, and Brunauer-Emmett-Teller surface area studies. The optical band gap was found in the range of 3.23-3.67 eV and the specific surface area was in the range of 108-225 m2/g, which contributes to the significantly enhanced photocatalytic and electrochemical performance. Photocatalytic H2 generation of as-prepared Cr-doped SnO2 nanostructures showed improved effect of the increasing dopant concentration with narrowing of the band gap. Electrochemical water-splitting studies also stressed upon the superiority of Cr-doped SnO2 nanostructures over pristine SnO2 toward hydrogen evolution reaction and oxygen evolution reaction responses.
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Affiliation(s)
- Sapan
K. Jain
- Nanochemistry
Laboratory, Department of Chemistry, Jamia
Millia Islamia, New Delhi 110025, India
| | - Mohd Fazil
- Nanochemistry
Laboratory, Department of Chemistry, Jamia
Millia Islamia, New Delhi 110025, India
| | - Nayeem Ahmad Pandit
- Nanochemistry
Laboratory, Department of Chemistry, Jamia
Millia Islamia, New Delhi 110025, India
| | - Syed Asim Ali
- Nanochemistry
Laboratory, Department of Chemistry, Jamia
Millia Islamia, New Delhi 110025, India
| | - Farha Naaz
- Nanochemistry
Laboratory, Department of Chemistry, Jamia
Millia Islamia, New Delhi 110025, India
| | - Huma Khan
- Nanochemistry
Laboratory, Department of Chemistry, Jamia
Millia Islamia, New Delhi 110025, India
| | - Amir Mehtab
- Nanochemistry
Laboratory, Department of Chemistry, Jamia
Millia Islamia, New Delhi 110025, India
- Department
of Chemistry, Texas A&M University, College Station, Texas 77843-3255, United States
| | - Jahangeer Ahmed
- Department
of Chemistry, College of Science, King Saud
University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Tokeer Ahmad
- Nanochemistry
Laboratory, Department of Chemistry, Jamia
Millia Islamia, New Delhi 110025, India
- . Phone: 91-11-26981717
extn 3261
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Zinzuvadiya S, Pandya NC, Sengunthar P, Pandya RJ, Khan SA, Tripathi A, Joshi U. 120 MeV Au+9 swift heavy ion irradiation of pulsed laser deposited BaM/LSMO bilayers. Radiat Phys Chem Oxf Engl 1993 2022. [DOI: 10.1016/j.radphyschem.2021.109503] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Sharma A, Bhardwaj U, Jain D, Kushwaha HS. NaNbO 3 Nanorods: Photopiezocatalysts for Elevated Bacterial Disinfection and Wastewater Treatment. ACS OMEGA 2022; 7:7595-7605. [PMID: 35284758 PMCID: PMC8908499 DOI: 10.1021/acsomega.1c06109] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Accepted: 01/21/2022] [Indexed: 05/08/2023]
Abstract
In the present work, ferroelectric sodium niobate (NaNbO3) nanorods are formulated to attain photopiezocatalysis for water pollutant degradation and bacterial disinfection. NaNbO3 nanorods, integrating the advantages of photocatalysis (generation of free charge carriers) and piezocatalysis (separation of these charge carriers), possess synergistic effects, which results in a higher catalytic activity than photocatalysis and piezocatalysis alone. Active species that are involved in the catalytic process are found to be •O2 - < OH• < h+, indicating the significance of piezocatalysis and photocatalysis. The degradation efficiency of sodium niobate (NaNbO3) nanorods for Rhodamine B in the presence of both sunlight and ultrasonic vibration is 98.9% within 60 min (k = 7.6 × 10-2 min-1). The piezo potential generated by NaNbO3 nanorods was reported to be 16 V. The antibacterial activity of the produced sample was found to be effective against Escherichia coli. With inhibitory zones of 23 mm, sodium niobate has a greater antibacterial activity.
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Affiliation(s)
- Aditi Sharma
- Materials
Research Centre, Malaviya National Institute
of Technology Jaipur (MNITJ), Jaipur 302017, India
| | - Upasana Bhardwaj
- Materials
Research Centre, Malaviya National Institute
of Technology Jaipur (MNITJ), Jaipur 302017, India
| | - Devendra Jain
- Department
of Molecular Biology and Biotechnology, Maharana Pratap University of Agriculture and Technology, Udaipur 313001, India
| | - Himmat Singh Kushwaha
- Materials
Research Centre, Malaviya National Institute
of Technology Jaipur (MNITJ), Jaipur 302017, India
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Pandit MA, Hemanth Kumar DS, Ramadoss M, Chen Y, Muralidharan K. Template free-synthesis of cobalt-iron chalcogenides [Co 0.8Fe 0.2L 2, L = S, Se] and their robust bifunctional electrocatalysis for the water splitting reaction and Cr(vi) reduction. RSC Adv 2022; 12:7762-7772. [PMID: 35424756 PMCID: PMC8982282 DOI: 10.1039/d2ra00447j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Accepted: 01/22/2022] [Indexed: 12/01/2022] Open
Abstract
The ease of production of materials and showing multiple applications are appealing in this modern era of advanced technology. This paper reports the synthesis of a pair of novel cobalt-iron chalcogenides [Co0.8Fe0.2S2 and Co0.8Fe0.2Se2] with enhanced electro catalytic activities. These ternary metal chalcogenides were synthesized by a one-step template-free approach via a hexamethyldisilazane (HMDS)-assisted synthetic method. Transient photocurrent (TPC) studies and electrochemical impedance spectra (EIS) of these materials showed free electron mobility. Their bifunctional activities were verified in both the electrochemical oxygen evolution reaction (OER) and in the electrochemical reduction of toxic inorganic heavy metal ions [Cr(vi)] in polluted water. The materials showed robust catalytic ability in the oxygen evolution reaction with minimum possible over potential (345 and 350 mV @ η10) as determined by linear sweep voltammetry and the lower Tafel values (52.4 and 84.5 mV dec-1) for Co0.8Fe0.2Se2 and Co0.8Fe0.2S2 respectively. Surprisingly, both the materials also showed an excellent activity towards electrochemical Cr(vi) reduction to Cr(iii). Besides the maximum current achieved for Co0.8Fe0.2S2, a minimum value for the Limit of detection (LOD) was obtained for Co0.8Fe0.2S2 (0.159 μg L-1) compared to Co0.8Fe0.2Se2 (0.196 μg L-1). We tested the durability of catalysts, the critical factor for the prolonged use of catalysts, through the recyclability measurements of these materials as catalysts. Both the catalysts presented outstanding durability and balanced electro catalytic activities for up to 1500 CV cycles, and chronoamperometry studies also confirmed exceptional stability. The enhanced catalytic activities of these materials are ascribed to the free electron movement, evidenced by the increased TPC measured and EIS. Therefore, the template-free synthesis of these electro catalysts containing non-noble metal illustrates the practical approach to develop such types of catalysts for multiple functions.
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Affiliation(s)
| | | | - Manigandan Ramadoss
- School of Chemistry, University of Hyderabad Hyderabad India
- School of Electronic Science and Engineering, University of Electronic Science and Technology of China Chengdu 610054 PR China
| | - Yuanfu Chen
- School of Electronic Science and Engineering, University of Electronic Science and Technology of China Chengdu 610054 PR China
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26
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Carbon dioxide photoreduction in prebiotic environments. Photochem Photobiol Sci 2022; 21:863-878. [PMID: 35107790 DOI: 10.1007/s43630-021-00168-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Accepted: 12/27/2021] [Indexed: 10/19/2022]
Abstract
The reduction of carbon dioxide is one of the hottest topics due to the concern of global warming. Carbon dioxide reduction is also an essential step for life's origins as photoautotrophs arose soon after Earth formation. Both the topics are of high general interest, and possibly, there could be a fruitful cross-fertilization of the two fields. Herein, we selected and collected papers related to photoreduction of carbon dioxide using compounds easily available on the Earth and considered of prebiotic relevance. This work might be useful also to scientists interested in carbon dioxide photoreduction and/or to have an overview of the techniques available.
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27
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Mehtab A, Ahmed J, Alshehri SM, Mao Y, Ahmad T. Rare earth doped metal oxide nanoparticles for photocatalysis: a perspective. NANOTECHNOLOGY 2022; 33:142001. [PMID: 34915455 DOI: 10.1088/1361-6528/ac43e7] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Accepted: 12/16/2021] [Indexed: 05/25/2023]
Abstract
Metal oxides are well-known materials that have been considered as the prominent photocatalysts. Photocatalysis is a promising way to address the environmental issues which are caused by fossil fuel the combustion and industrial pollutants. Lot of efforts such as doping of metal oxides with metals, non-metals have been made to enhance their photocatalytic activity. More specifically, in this review we have discussed detailed synthesis procedures of rare earth doped metal oxides performed in the past decades. The advantage of doping metal oxides with rare earth metals is that they readily combine with functional groups due to the 4f vacant orbitals. Moreover, doping rare earth metals causes absorbance shift to the visible region of the electromagnetic spectrum which results to show prominent photocatalysis in this region. The effect of rare earth doping on different parameters of metal oxides such as band gap and charge carrier recombination rate has been made in great details. In perspective section, we have given a brief description about how researchers can improve the photocatalytic efficiencies of different metal oxides in coming future. The strategies and outcomes outlined in this review are expected to stimulate the search for a whole new set of rare earth doped metal oxides for efficient photocatalytic applications.
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Affiliation(s)
- Amir Mehtab
- Nanochemistry Laboratory, Department of Chemistry, Jamia Millia Islamia, New Delhi-110025, India
| | - Jahangeer Ahmed
- Department of Chemistry, College of Science, King Saud University, PO Box 2455, Riyadh 11451, Saudi Arabia
| | - Saad M Alshehri
- Department of Chemistry, College of Science, King Saud University, PO Box 2455, Riyadh 11451, Saudi Arabia
| | - Yuanbing Mao
- Department of Chemistry, Illinois Institute of Technology, 3105 South Dearborn Street, Chicago, IL 60616, United States of America
| | - Tokeer Ahmad
- Nanochemistry Laboratory, Department of Chemistry, Jamia Millia Islamia, New Delhi-110025, India
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Ramalingam G, Magdalane CM, Arjun Kumar B, Yuvakkumar R, Ravi G, Jothi AI, Rotte NK, Murugadoss G, Ananth A. Enhanced visible light-driven photocatalytic performance of CdSe nanorods. ENVIRONMENTAL RESEARCH 2022; 203:111855. [PMID: 34384750 DOI: 10.1016/j.envres.2021.111855] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 07/29/2021] [Accepted: 08/04/2021] [Indexed: 06/13/2023]
Abstract
Cadmium selenide (CdSe) semiconductor nanorods are prepared in hydrothermal process using hydrazine hydrate (N2H4.H2O) and ammonia (NH3.H2O) as reducing agents. The reaction time is increased to 7 h and the amount of hydrazine hydrate used is also increased to 15 mL which have resulted in diminished stacking faults in the CdSe nanorods prepared. The crystal structure, morphological variations, and size of the prepared CdSe nanorods are examined by XRD analysis. The crystalline size of the CdSe nanorods is 20-30 nm in diameter. HRTEM images reveal the formation of high order CdSe nanorods of the length about 25-40 nm. The bandgap in the CdSe nanoparticles is determined to be 2.17 eV. The peak at 595 nm in photoluminescence (PL) spectrum indicates oxygen vacancy defects in the prepared CdSe sample. The variation of dielectric properties with respect to temperature and frequency of pelletized CdSe is studied. High photocatalytic efficiency (98%) of catalyst/H2O2 is also achieved for decomposition of Rhodamine-B dye.
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Affiliation(s)
- G Ramalingam
- Quantum Materials Research Lab (QMRL), Department of Nanoscience and Technology, Alagappa University, Karaikudi, 630003, Tamil Nadu, India.
| | - C Maria Magdalane
- Department of Chemistry, St. Xavier's College, Thirunelveli, 627002, Tamil Nadu-India
| | - B Arjun Kumar
- Quantum Materials Research Lab (QMRL), Department of Nanoscience and Technology, Alagappa University, Karaikudi, 630003, Tamil Nadu, India
| | - R Yuvakkumar
- Department of Physics, Alagappa University, Karaikudi, 630003, Tamil Nadu, India
| | - G Ravi
- Department of Physics, Alagappa University, Karaikudi, 630003, Tamil Nadu, India
| | - A Irudaya Jothi
- Department of Chemistry, St. Joseph's College (Affiliated to Bharathidasan University), Tiruchirappalli, 620002, Tamil Nadu, India
| | - Naresh Kumar Rotte
- Department of Chemistry, St. Xavier's College, Thirunelveli, 627002, Tamil Nadu-India
| | - G Murugadoss
- Centre for Nanoscience and Nanotechnology, Sathyabama Institute of Science and Technology, Chennai, 600119, Tamil Nadu, India
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Muhamath Basha MA, David Nagarajan JW. Annealed PCz/MnO2 nanocomposite for the methodical separation of photoinduced electron–hole pairs for escalated photocatalytic activity. JOURNAL OF POLYMER RESEARCH 2021. [DOI: 10.1007/s10965-021-02791-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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30
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Maibam A, Chakraborty D, Joshi K, Krishnamurty S. Exploring edge functionalised blue phosphorene nanoribbons as novel photocatalysts for water splitting. NEW J CHEM 2021. [DOI: 10.1039/d0nj03950k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
1D phosphorene nanoribbon edges activating water molecules under sunlight.
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Affiliation(s)
- Ashakiran Maibam
- Physical and Materials Chemistry Division
- National Chemical Laboratory
- Pune 411008
- India
- Academy of Scientific and Innovative Research
| | - Debalina Chakraborty
- Physical and Materials Chemistry Division
- National Chemical Laboratory
- Pune 411008
- India
| | - Krati Joshi
- Physical and Materials Chemistry Division
- National Chemical Laboratory
- Pune 411008
- India
| | - Sailaja Krishnamurty
- Physical and Materials Chemistry Division
- National Chemical Laboratory
- Pune 411008
- India
- Academy of Scientific and Innovative Research
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31
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Naaz F, Farooq U, Khan MAM, Ahmad T. Multifunctional Efficacy of Environmentally Benign Silver Nanospheres for Organic Transformation, Photocatalysis, and Water Remediation. ACS OMEGA 2020; 5:26063-26076. [PMID: 33073133 PMCID: PMC7558020 DOI: 10.1021/acsomega.0c03584] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Accepted: 09/15/2020] [Indexed: 06/11/2023]
Abstract
Highly crystalline and monophasic silver nanospheres with a high specific surface area of 57 m2/g have been synthesized by an environmentally benign rapid chemical reduction using l-alanine for catalytic transformation, photocatalytic degradation, and bacterial disinfection, which can provide an ample strategy for water remediation. Electron microscopic analysis confirms the spherical morphology of as-prepared silver nanoparticles with an average grain size of 20 nm. Silver nanospheres showed excellent catalytic activity for the catalytic hydrogenation and conversion (95.6%) of 4-nitrophenol to 4-aminophenol. Significant photocatalytic degradation proficiency was also shown for methylene blue (94.5%) and rhodamine B (96.3%) dyes under solar irradiation. The antibacterial behavior of Ala-Ag nanospheres was demonstrated through the disk diffusion antibacterial assay against Gram-positive (Escherichia coli) and Gram-negative (Staphylococcus aureus) bacteria. Multifunctional efficiency of as-prepared Ala-Ag nanospheres for water remediation has also been established.
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Affiliation(s)
- Farha Naaz
- Nanochemistry
Laboratory, Department of Chemistry, Jamia
Millia Islamia, New Delhi 110025, India
| | - Umar Farooq
- Nanochemistry
Laboratory, Department of Chemistry, Jamia
Millia Islamia, New Delhi 110025, India
| | - M. A. Majeed Khan
- King
Abdullah Institute for Nanotechnology, King
Saud University, Riyadh 11451, Saudi Arabia
| | - Tokeer Ahmad
- Nanochemistry
Laboratory, Department of Chemistry, Jamia
Millia Islamia, New Delhi 110025, India
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32
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Efficient Multifunctional Catalytic and Sensing Properties of Synthesized Ruthenium Oxide Nanoparticles. Catalysts 2020. [DOI: 10.3390/catal10070780] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Ruthenium oxide is one of the most active electrocatalyst for oxygen evolution (OER) and oxygen reduction reaction (ORR). Herein, we report simple wet chemical route to synthesize RuO2 nanoparticles at controlled temperature. The structural, morphological and surface area studies of the synthesized nanoparticles were conducted with X-ray diffraction, electron microscopy and BETsurface area studies. The bifunctional electrocatalytic performance of RuO2 nanoparticles was studied under different atmospheric conditions for OER and ORR, respectively, versus reversible hydrogen electrode (RHE) in alkaline medium. Low Tafel slopes of RuO2 nanoparticles were found to be ~47 and ~49 mV/dec for OER and ORR, respectively, in oxygen saturated 0.5 M KOH system. Moreover, the catalytic activity of RuO2 nanoparticles was examined against the Horseradish peroxidase enzyme (HRP) at high temperature, and the nanoparticles were applied as a sensor for the detection of H2O2 in the solution.
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33
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Suhendra E, Chang CH, Hou WC, Hsieh YC. A Review on the Environmental Fate Models for Predicting the Distribution of Engineered Nanomaterials in Surface Waters. Int J Mol Sci 2020; 21:ijms21124554. [PMID: 32604975 PMCID: PMC7349326 DOI: 10.3390/ijms21124554] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2020] [Revised: 06/14/2020] [Accepted: 06/16/2020] [Indexed: 11/16/2022] Open
Abstract
Exposure assessment is a key component in the risk assessment of engineered nanomaterials (ENMs). While direct and quantitative measurements of ENMs in complex environmental matrices remain challenging, environmental fate models (EFMs) can be used alternatively for estimating ENMs' distributions in the environment. This review describes and assesses the development and capability of EFMs, focusing on surface waters. Our review finds that current engineered nanomaterial (ENM) exposure models can be largely classified into three types: material flow analysis models (MFAMs), multimedia compartmental models (MCMs), and spatial river/watershed models (SRWMs). MFAMs, which is already used to derive predicted environmental concentrations (PECs), can be used to estimate the releases of ENMs as inputs to EFMs. Both MCMs and SRWMs belong to EFMs. MCMs are spatially and/or temporally averaged models, which describe ENM fate processes as intermedia transfer of well-mixed environmental compartments. SRWMs are spatiotemporally resolved models, which consider the variability in watershed and/or stream hydrology, morphology, and sediment transport of river networks. As the foundation of EFMs, we also review the existing and emerging ENM fate processes and their inclusion in recent EFMs. We find that while ENM fate processes, such as heteroaggregation and dissolution, are commonly included in current EFMs, few models consider photoreaction and sulfidation, evaluation of the relative importance of fate processes, and the fate of weathered/transformed ENMs. We conclude the review by identifying the opportunities and challenges in using EFMs for ENMs.
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Farooq U, Ahmed J, Alshehri SM, Ahmad T. High-Surface-Area Sodium Tantalate Nanoparticles with Enhanced Photocatalytic and Electrical Properties Prepared through Polymeric Citrate Precursor Route. ACS OMEGA 2019; 4:19408-19419. [PMID: 31763565 PMCID: PMC6868898 DOI: 10.1021/acsomega.9b02830] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2019] [Accepted: 10/24/2019] [Indexed: 05/25/2023]
Abstract
NaTaO3 nanoparticles with a high surface area of 46.2 m2/g have been successfully synthesized using a polymeric citrate precursor route. As-prepared nanoparticles were extensively characterized by X-ray diffraction, Fourier transform infrared, transmission emission microscopy, and scanning electron microscopy studies for the analysis of phase purity, crystallinity, and morphology. NaTaO3 nanoparticles show efficient photo-induced removal of the methylene blue dye under sunlight, which were confirmed by using liquid chromatography-mass spectroscopy. 86% dye has been degraded in 200 min at neutral pH, whereas the same amount of dye was decolorized in only 80 min at alkaline pH. Also, the dielectric behavior of the as-prepared nanoparticles at different annealing temperatures was explained by the Maxwell-Wagner polarization mechanism. At 500, 600, and 700 °C annealing temperatures, the dielectric constant and dielectric loss at 500 kHz for the samples were found to be 21.5, 18, and 16 and 0.012, 0.022, and 0.029, respectively. The unsaturated hysteresis loop shows weak ferroelectric behavior of NaTaO3 nanoparticles with remanent and saturation polarizations of 0.0013 and 0.21 μC/cm2, respectively, and S-E hysteresis shows a bipolar strain of 0.10%.
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Affiliation(s)
- Umar Farooq
- Nanochemistry
Laboratory, Department of Chemistry, Jamia
Millia Islamia, New Delhi 110025, India
| | - Jahangeer Ahmed
- Department
of Chemistry, College of Science, King Saud
University, Riyadh 11451, Saudi Arabia
| | - Saad M. Alshehri
- Department
of Chemistry, College of Science, King Saud
University, Riyadh 11451, Saudi Arabia
| | - Tokeer Ahmad
- Nanochemistry
Laboratory, Department of Chemistry, Jamia
Millia Islamia, New Delhi 110025, India
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35
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Bhat SA, Zafar F, Mondal AH, Kareem A, Mirza AU, Khan S, Mohammad A, Haq QMR, Nishat N. Photocatalytic degradation of carcinogenic Congo red dye in aqueous solution, antioxidant activity and bactericidal effect of NiO nanoparticles. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2019. [DOI: 10.1007/s13738-019-01767-3] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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36
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Durai L, Badhulika S. A facile, solid-state reaction assisted synthesis of a berry-like NaNbO3 perovskite structure for binder-free, highly selective sensing of dopamine in blood samples. NEW J CHEM 2019. [DOI: 10.1039/c9nj02282a] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Synthesis and fabrication of a berry-like NaNbO3 perovskite-based modified GCE sensor for the highly selective sensing of dopamine.
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Affiliation(s)
- Lignesh Durai
- Department of Electrical Engineering
- Indian Institute of Technology
- Hyderabad
- India
| | - Sushmee Badhulika
- Department of Electrical Engineering
- Indian Institute of Technology
- Hyderabad
- India
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