1
|
Kesavan G, Sorescu DC, Ahamed R, Damodaran K, Crawford SE, Askari F, Star A. Influence of gadolinium doping on structural, optical, and electronic properties of polymeric graphitic carbon nitride. RSC Adv 2024; 14:23342-23351. [PMID: 39049892 PMCID: PMC11267507 DOI: 10.1039/d4ra03437f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2024] [Accepted: 07/16/2024] [Indexed: 07/27/2024] Open
Abstract
Polymeric graphitic carbon nitride (gCN) materials have received great attention in the fields of photo and electrocatalysis due to their distinct properties in metal-free systems with high physicochemical stability. Nevertheless, the activity of undoped gCN is limited due to its relatively low specific surface area, low conductivity, and poor dispersibility. Doping Gd atoms in a gCN matrix is an efficient strategy to fine-tune its catalytic activity and its electronic structure. Herein, the influence of various wt% of gadolinium (Gd) doped in melon-type carbon nitride was systematically investigated. Gadolinium-doped graphitic carbon nitride (GdgCN) was synthesized by adding gadolinium nitrate to dicyandiamide during polymerization. The X-ray diffraction (XRD) and transmission electron microscopy (TEM) results revealed that the crystallinity and the morphological properties are influenced by the % of Gd doping. Furthermore, X-ray photoelectron spectroscopy (XPS) studies revealed that the gadolinium ions bonded with nitrogen atoms. Complementary density functional theory (DFT) calculations illustrate possible bonding configurations of Gd ions both in bulk material and on ultrathin melon layers and provide evidence for the corresponding bandgap modifications induced by gadolinium doping.
Collapse
Affiliation(s)
- Ganesh Kesavan
- Department of Chemistry, University of Pittsburgh Pittsburgh Pennsylvania 15260 USA
| | - Dan C Sorescu
- United States Department of Energy, National Energy Technology Laboratory Pittsburgh Pennsylvania 15236 USA
- Department of Chemical & Petroleum Engineering, University of Pittsburgh Pittsburgh Pennsylvania 15261 USA
| | - Raihan Ahamed
- Department of Chemistry, University of Pittsburgh Pittsburgh Pennsylvania 15260 USA
| | - Krishnan Damodaran
- Department of Chemistry, University of Pittsburgh Pittsburgh Pennsylvania 15260 USA
| | - Scott E Crawford
- United States Department of Energy, National Energy Technology Laboratory Pittsburgh Pennsylvania 15236 USA
| | - Faezeh Askari
- Department of Chemistry, University of Pittsburgh Pittsburgh Pennsylvania 15260 USA
| | - Alexander Star
- Department of Chemistry, University of Pittsburgh Pittsburgh Pennsylvania 15260 USA
- Department of Bioengineering, University of Pittsburgh Pittsburgh Pennsylvania 15261 USA
| |
Collapse
|
2
|
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.
Collapse
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
| |
Collapse
|
3
|
Li D, Tian S, Qian Q, Gao C, Shen H, Han F. Cs-Doped WO 3 with Enhanced Conduction Band for Efficient Photocatalytic Oxygen Evolution Reaction Driven by Long-Wavelength Visible Light. Molecules 2024; 29:3126. [PMID: 38999078 PMCID: PMC11243054 DOI: 10.3390/molecules29133126] [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: 05/29/2024] [Revised: 06/19/2024] [Accepted: 06/26/2024] [Indexed: 07/14/2024] Open
Abstract
Cesium doped WO3 (Cs-WO3) photocatalyst with high and stable oxidation activity was successfully synthesized by a one-step hydrothermal method using Cs2CO3 as the doped metal ion source and tungstic acid (H2WO4) as the tungsten source. A series of analytical characterization tools and oxygen precipitation activity tests were used to compare the effects of different additions of Cs2CO3 on the crystal structure and microscopic morphologies. The UV-visible diffuse reflectance spectra (DRS) of Cs-doped material exhibited a significant red shift in the absorption edge with new shoulders appearing at 440-520 nm. The formation of an oxygen vacancy was confirmed in Cs-WO3 by the EPR signal, which can effectively regulate the electronic structure of the catalyst surface and contribute to improving the activity of the oxygen evolution reaction (OER). The photocatalytic OER results showed that the Cs-WO3-0.1 exhibited the optimal oxygen precipitation activity, reaching 58.28 µmol at 6 h, which was greater than six times higher than that of WO3-0 (9.76 μmol). It can be attributed to the synergistic effect of the increase in the conduction band position of Cs-WO3-0.1 (0.11 V) and oxygen vacancies compared to WO3-0, which accelerate the electron conduction rate and slow down the rapid compounding of photogenerated electrons-holes, improving the water-catalytic oxygen precipitation activity of WO3.
Collapse
Affiliation(s)
- Dong Li
- School of Materials Science & Engineering, North Minzu University, Yinchuan 750021, China; (S.T.); (Q.Q.); (H.S.); (F.H.)
- National and Local Joint Engineering Research Center of Advanced Carbon-Based Ceramics Preparation Technology, Yinchuan 750021, China
| | - Siyu Tian
- School of Materials Science & Engineering, North Minzu University, Yinchuan 750021, China; (S.T.); (Q.Q.); (H.S.); (F.H.)
| | - Qiuhua Qian
- School of Materials Science & Engineering, North Minzu University, Yinchuan 750021, China; (S.T.); (Q.Q.); (H.S.); (F.H.)
| | - Caiyun Gao
- Chemical Science and Engineering College, North Minzu University, Yinchuan 750021, China;
| | - Hongfang Shen
- School of Materials Science & Engineering, North Minzu University, Yinchuan 750021, China; (S.T.); (Q.Q.); (H.S.); (F.H.)
- National and Local Joint Engineering Research Center of Advanced Carbon-Based Ceramics Preparation Technology, Yinchuan 750021, China
| | - Fei Han
- School of Materials Science & Engineering, North Minzu University, Yinchuan 750021, China; (S.T.); (Q.Q.); (H.S.); (F.H.)
| |
Collapse
|
4
|
Dai D, Zhang Y, Yang S, Kong W, Yang J, Zhang J. Recent Advances in Functional Materials for Optical Data Storage. Molecules 2024; 29:254. [PMID: 38202837 PMCID: PMC10780730 DOI: 10.3390/molecules29010254] [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: 11/21/2023] [Revised: 12/26/2023] [Accepted: 12/29/2023] [Indexed: 01/12/2024] Open
Abstract
In the current data age, the fundamental research related to optical applications has been rapidly developed. Countless new-born materials equipped with distinct optical properties have been widely explored, exhibiting tremendous values in practical applications. The optical data storage technique is one of the most significant topics of the optical applications, which is considered as the prominent solution for conquering the challenge of the explosive increase in mass data, to achieve the long-life, low-energy, and super high-capacity data storage. On this basis, our review outlines the representative reports for mainly introducing the functional systems based on the newly established materials applied in the optical storage field. According to the material categories, the representative functional systems are divided into rare-earth doped nanoparticles, graphene, and diarylethene. In terms of the difference of structural features and delicate properties among the three materials, the application in optical storage is comprehensively illustrated in the review. Meanwhile, the potential opportunities and critical challenges of optical storage are also discussed in detail.
Collapse
Affiliation(s)
- Dihua Dai
- China Hualu Group Co., Ltd., 717 Huangpu Road, Dalian 116023, China; (D.D.); (Y.Z.); (S.Y.); (W.K.)
| | - Yong Zhang
- China Hualu Group Co., Ltd., 717 Huangpu Road, Dalian 116023, China; (D.D.); (Y.Z.); (S.Y.); (W.K.)
| | - Siwen Yang
- China Hualu Group Co., Ltd., 717 Huangpu Road, Dalian 116023, China; (D.D.); (Y.Z.); (S.Y.); (W.K.)
| | - Weicheng Kong
- China Hualu Group Co., Ltd., 717 Huangpu Road, Dalian 116023, China; (D.D.); (Y.Z.); (S.Y.); (W.K.)
| | - Jie Yang
- School of Life Sciences, Jilin University, 2699 Qianjin Street, Changchun 130012, China
| | - Jijun Zhang
- China Hualu Group Co., Ltd., 717 Huangpu Road, Dalian 116023, China; (D.D.); (Y.Z.); (S.Y.); (W.K.)
| |
Collapse
|
5
|
Mehtab A, Mao Y, M Alshehri S, Ahmad T. Photo/electrocatalytic hydrogen evolution using Type-II Cu 2O/g-C 3N 4 Heterostructure: Density functional theory addresses the improved charge transport efficiency. J Colloid Interface Sci 2023; 652:1467-1480. [PMID: 37659315 DOI: 10.1016/j.jcis.2023.08.144] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Revised: 08/17/2023] [Accepted: 08/23/2023] [Indexed: 09/04/2023]
Abstract
One of the most efficient ways for the photogenerated charge carriers is by the development of heterojunction between p-type and n-type semiconductors, which creates an interfacial charge transfer between two semiconductors. By enhancing the bifunctional characteristics for hydrogen generation via photocatalytic and electrocatalytic water splitting reaction, we report the type-II Cu2O/g-C3N4 heterostructure in this article. Due to significantly increased catalytically active sites for the hydrogen evolution reaction (HER) reaction during electrocatalysis and decreased charge transfer resistance, the as-prepared heterostructure exhibits a lower overpotential of 47 and 72 mVdec-1 for the HER and oxygen evolution reactions (OER), respectively, when compared to alone g-C3N4. In addition, Cu2O/g-C3N4 heterostructures have a higher photocatalytic hydrogen evolution of 3492 µmol gcat-1 in the presence of Triethanolamine as a sacrificial agent, which is nearly 2-fold times greater than g-C3N4 (1818 µmol gcat-1) after 5 h of continuous light-irradiation. Moreover, produced heterostructure exhibits 81% of Faradaic efficiency and 18% of apparent quantum yield. This work successfully explains how the rise in water splitting is induced by the transfer of photogenerated electrons in a cascade way from p-type Cu2O to the n-type g-C3N4 using density functional theory (DFT) calculations.
Collapse
Affiliation(s)
- Amir Mehtab
- Nanochemistry Laboratory, Department of Chemistry, Jamia Millia Islamia, New Delhi 110025, India
| | - Yuanbing Mao
- Department of Chemistry, Illinois Institute of Technology, 3105 South Dearborn Street, Chicago, IL 60616, USA
| | - Saad M Alshehri
- 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.
| |
Collapse
|
6
|
Wang T, Li S, Yan W, Jiang S, Xie H, Li G, Jiang L. Infrared spectroscopic study of solvation and size effects on reactions between water molecules and neutral rare-earth metals. NANOSCALE ADVANCES 2023; 5:6626-6634. [PMID: 38024292 PMCID: PMC10662163 DOI: 10.1039/d3na00873h] [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: 10/11/2023] [Accepted: 10/25/2023] [Indexed: 12/01/2023]
Abstract
Elucidating the solvation and size effects on the reactions between water and neutral metals is crucial for understanding the microscopic mechanism of the catalytic processes but has been proven to be a challenging experimental target due to the difficulty in size selection. Here, MO4H6 and M2O6H7 (M = Sc, Y, La) complexes were synthesized using a laser-vaporization cluster source and characterized by size-specific infrared-vacuum ultraviolet spectroscopy combined with quantum chemical calculations. The MO4H6 and M2O6H7 complexes were found to have H˙M(OH)3(H2O) and M2(μ2-OH)2(η1-OH)3(η1-OH2) structures, respectively. A combination of experiments and theory revealed that the formation of H˙M(OH)3(H2O) and M2(μ2-OH)2(η1-OH)3(η1-OH2) is both thermodynamically exothermic and kinetically facile in the gas phase. The results indicated that upon the addition of water to H˙M(OH)3, the feature of the hydrogen radical is retained. In the processes from mononuclear H˙M(OH)3 to binuclear M2(μ2-OH)2(η1-OH)3(η1-OH2), the active hydrogen atom undergoes the evolution from hydrogen radical → bridging hydrogen → metal hydride → hydrogen bond, which is indicative of a reduced reactivity. The present system serves as a model for clarifying the solvation and size effects on the reactions between water and neutral rare-earth metals and offers a general paradigm for systematic studies on a broad class of the reactions between small molecules and metals at the nanoscale.
Collapse
Affiliation(s)
- Tiantong Wang
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences Dalian 116023 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Shangdong Li
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences Dalian 116023 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Wenhui Yan
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences Dalian 116023 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Shuai Jiang
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences Dalian 116023 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Hua Xie
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences Dalian 116023 China
| | - Gang Li
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences Dalian 116023 China
| | - Ling Jiang
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences Dalian 116023 China
- Hefei National Laboratory Hefei 230088 China
| |
Collapse
|
7
|
Manju, Rajput P, Vij A, Thakur A. Dysprosium site occupancy in SrZnO 2 nanophosphors probed through XANES. Phys Chem Chem Phys 2023; 25:28473-28478. [PMID: 37846758 DOI: 10.1039/d3cp03041e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2023]
Abstract
Doping-assisted lattice site engineering is widely practiced to obtain a tailor made response, which subsequently poses a need for an efficient probe of the local electronic structure of the system. This study presents a detailed analysis of the local electronic structure around the host cations (Zn2+ and Sr2+) and dopant (Dy3+) through combined experimental and simulated X-ray absorption near edge structure. The real space full multiple scattering-based simulations of the Zn K-edge are done by substituting Dy at cationic sites in the second coordination shell around Zn, in various combinations along with and/or without oxygen vacancies in the system. The results revealed that Dy tends to substitute the less symmetric Sr2+ site at low doping concentration, whereas it starts substituting the relatively more symmetric Zn2+ lattice site with an increase in doping concentration, consequently affirming the origin of cold white emission upon charge transfer in the system (Manju, M. Jain, P. Vashishtha, G. Gupta, A. Sharma, S. O. Won, A. Vij and A. Thakur, J. Phys.: Condens. Matter, 2020, 33, 035703). The effect of Zn site occupancy is seen as bifurcation of the single peaked Dy L3 absorption edge, which is usually reported as the sole indication of the existence of a mixed valence state. Thus, the combined analyses decipher the effect of lattice site occupancy on the local electronic structure of host as well as dopant atoms.
Collapse
Affiliation(s)
- Manju
- Advanced Materials Research Lab, Department of Physics, Punjabi University Patiala-147 002, Punjab, India.
- Department of Physics, Chandigarh University, Mohali-140 413, Punjab, India
| | - Parasmani Rajput
- Beamline Development and Application Section, Bhabha Atomic Research Center, Trombay, Mumbai-400 085, Maharashtra, India.
- Homi Bhabha National Institute, Anushakti Nagar, Mumbai-400094, India
| | - Ankush Vij
- Department of Physics and Astrophysics, Central University of Haryana, Mahendragarh-123 031, Haryana, India.
| | - Anup Thakur
- Advanced Materials Research Lab, Department of Physics, Punjabi University Patiala-147 002, Punjab, India.
| |
Collapse
|
8
|
Geldasa FT, Kebede MA, Shura MW, Hone FG. Experimental and computational study of metal oxide nanoparticles for the photocatalytic degradation of organic pollutants: a review. RSC Adv 2023; 13:18404-18442. [PMID: 37342807 PMCID: PMC10278095 DOI: 10.1039/d3ra01505j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Accepted: 05/31/2023] [Indexed: 06/23/2023] Open
Abstract
Photocatalysis is a more proficient technique that involves the breakdown or decomposition of different organic contaminants, various dyes, and harmful viruses and fungi using UV or visible light solar spectrum. Metal oxides are considered promising candidate photocatalysts owing to their low cost, efficiency, simple fabricating method, sufficient availability, and environment-friendliness for photocatalytic applications. Among metal oxides, TiO2 is the most studied photocatalyst and is highly applied in wastewater treatment and hydrogen production. However, TiO2 is relatively active only under ultraviolet light due to its wide bandgap, which limits its applicability because the production of ultraviolet is expensive. At present, the discovery of a photocatalyst of suitable bandgap with visible light or modification of the existing photocatalyst is becoming very attractive for photocatalysis technology. However, the major drawbacks of photocatalysts are the high recombination rate of photogenerated electron-hole pairs, the ultraviolet light activity limitations, and low surface coverage. In this review, the most commonly used synthesis method for metal oxide nanoparticles, photocatalytic applications of metal oxides, and applications and toxicity of different dyes are comprehensively highlighted. In addition, the challenges in the photocatalytic applications of metal oxides, strategies to suppress these challenges, and metal oxide studied by density functional theory for photocatalytic applications are described in detail.
Collapse
Affiliation(s)
- Fikadu Takele Geldasa
- Adama Science and Technology University, Department of Applied Physics P. O. Box1888 Adama Ethiopia
- Oda Bultum University, Department of Physics P. O. Box 226, Chiro Ethiopia
| | - Mesfin Abayneh Kebede
- Institute for Nanotechnology and Water Sustainability, College of Science, Engineering and Technology, University of South Africa Florida Science Campus Johannesburg 1710 South Africa
| | - Megersa Wodajo Shura
- Adama Science and Technology University, Department of Applied Physics P. O. Box1888 Adama Ethiopia
| | - Fekadu Gashaw Hone
- Addis Ababa University, Department of Physics P.O. Box: 1176 Addis Ababa Ethiopia
| |
Collapse
|
9
|
Liu Z, Zhong Y, Hu Z, Zhang W, Zhang X, Ji X, Wang X. Modification of ZIF-8 nanocomposite by a Gd atom doped TiO2 for high efficiency photocatalytic degradation of neutral red dye: An experimental and theoretical study. J Mol Liq 2023. [DOI: 10.1016/j.molliq.2023.121729] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/28/2023]
|
10
|
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
| |
Collapse
|
11
|
Bismuth-Based Multi-Component Heterostructured Nanocatalysts for Hydrogen Generation. Catalysts 2023. [DOI: 10.3390/catal13020295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
Developing a unique catalytic system with enhanced activity is the topmost priority in the science of H2 energy to reduce costs in large-scale applications, such as automobiles and domestic sectors. Researchers are striving to design an effective catalytic system capable of significantly accelerating H2 production efficiency through green pathways, such as photochemical, electrochemical, and photoelectrochemical routes. Bi-based nanocatalysts are relatively cost-effective and environmentally benign materials which possess advanced optoelectronic properties. However, these nanocatalysts suffer back recombination reactions during photochemical and photoelectrochemical operations which impede their catalytic efficiency. However, heterojunction formation allows the separation of electron–hole pairs to avoid recombination via interfacial charge transfer. Thus, synergetic effects between the Bi-based heterostructured nanocatalysts largely improves the course of H2 generation. Here, we propose the systematic review of Bi-based heterostructured nanocatalysts, highlighting an in-depth discussion of various exceptional heterostructures, such as TiO2/BiWO6, BiWO6/Bi2S3, Bi2WO6/BiVO4, Bi2O3/Bi2WO6, ZnIn2S4/BiVO4, Bi2O3/Bi2MoO6, etc. The reviewed heterostructures exhibit excellent H2 evolution efficiency, ascribed to their higher stability, more exposed active sites, controlled morphology, and remarkable band-gap tunability. We adopted a slightly different approach for reviewing Bi-based heterostructures, compiling them according to their applicability in H2 energy and discussing challenges, prospects, and guidance to develop better and more efficient nanocatalytic systems.
Collapse
|
12
|
Reddy CV, Kakarla RR, Shim J, Zairov RR, Aminabhavi TM. Hydrothermally derived Cr-doped SnO 2 nanoflakes for enhanced photocatalytic and photoelectrochemical water oxidation performance under visible light irradiation. ENVIRONMENTAL RESEARCH 2023; 217:114672. [PMID: 36356664 DOI: 10.1016/j.envres.2022.114672] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Revised: 10/21/2022] [Accepted: 10/24/2022] [Indexed: 06/16/2023]
Abstract
Photocatalytic dye degradation is a method of environmental degradation that is commonly used to eliminate various pollutants produced by pharmaceutical and textile industries. Herein, pure and chromium (Cr)-doped SnO2 nanoflakes were synthesized using a simple facile hydrothermal method and photocatalytic properties were studied under visible light illumination. In addition, photoelectrochemical (PEC) water oxidation properties were also studied using the prepared samples. Doping of transition metal ions introduces structural defects, which narrow the band gap of host sample, resulting in high catalytic activity. The synthesized doped SnO2 displayed a rutile tetragonal crystal phase with a nanoflakes-like surface morphology having no other contaminations. The optical band gap of Cr-doped SnO2 nanoflakes was significantly reduced (2.48 eV) over the pure sample (3.32 eV), due to successful incorporation of Cr ions into the host lattice. Furthermore, the dye removal efficiency of these nanoflakes was investigated for methyl orange (MO) and tetracycline (TC) organic contaminations. The Cr-doped SnO2 nanoflakes exhibited superior photodegradation with 87.8% and 90.6% dye removal efficiency, within 90 min of light illumination. PEC water oxidation analysis showed that the doped photoelectrode achieved enhanced photocurrent density and showed a higher photocurrent density (1.08 mA cm-2) over that of the undoped electrode (0.60 mA cm-2). Electrochemical impedance spectroscopy (EIS) showed that doped electrodes exhibited lesser charge resistance than the pure electrode. The synthesized Cr-doped SnO2 nanoflakes are suitable for water oxidation and photodegradation of organic pollutants. Thus, we strongly believe that the obtained results in this report will continue to provide new opportunities for the improvement of effective visible light photocatalysts for industrial wastewater treatment and water splitting for H2 generation.
Collapse
Affiliation(s)
- Ch Venkata Reddy
- School of Engineering, Yeungnam University, Gyeongsan, 712749, South Korea
| | - Raghava Reddy Kakarla
- School of Chemical and Biomolecular Engineering, The University of Sydney, Sydney, NSW, 2006, Australia
| | - Jaesool Shim
- School of Engineering, Yeungnam University, Gyeongsan, 712749, South Korea
| | - Rustem R Zairov
- Aleksander Butlerov Institute of Chemistry, Kazan Federal University, Kazan, 420008, 1/29 Lobachevskogo Str, Russian Federation
| | - Tejraj M Aminabhavi
- School of Advanced Sciences, KLE Technological University, Hubballi, 580031, Karnataka, India; School of Engineering, UPES, Bidholi, Dehradun, 248 007, Uttarakhand, India.
| |
Collapse
|
13
|
Ikram M, Shahzadi A, Bilal M, Haider A, Ul-Hamid A, Nabgan W, Haider J, Ali S, Imran M. Strontium-doped chromium oxide for RhB reduction and antibacterial activity with evidence of molecular docking analysis. Front Chem 2023; 11:1167701. [PMID: 37123878 PMCID: PMC10133565 DOI: 10.3389/fchem.2023.1167701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Accepted: 04/03/2023] [Indexed: 05/02/2023] Open
Abstract
The emergence of multi-drug resistance (MDR) in aquatic pathogens and the presence of cationic dyes are the leading causes of water contamination on a global scale. In this context, nanotechnology holds immense promise for utilizing various nanomaterials with catalytic and antibacterial properties. This study aimed to evaluate the catalytic and bactericidal potential of undoped and Sr-doped Cr2O3 nanostructures (NSs) synthesized through the co-precipitation method. In addition, the morphological, optical, and structural properties of the resultant NSs were also examined. The optical bandgap energy of Cr2O3 has been substantially reduced by Sr doping, as confirmed through extracted values from absorption spectra recorded by UV-Vis studies. The field-emission scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM) micrographs illustrate that the composition of Cr2O3 primarily consisted of agglomerated, irregularly shaped NSs with a morphology resembling nanoflakes. Moreover, the presence of Sr in the lattice of Cr2O3 increased the roughness of the resulting NSs. The catalytic activity of synthesized NSs was analyzed by their reduction ability of Rhodamine B (RhB) dye in the dark under different pH conditions. Their antibacterial activity was evaluated against MDR Escherichia coli (E. coli). Sr doping increased antibacterial efficiency against MDR E. coli, as indicated by inhibition zone measurements of 10.15 and 11.75 mm at low and high doses, respectively. Furthermore, a molecular docking analysis was conducted to determine the binding interaction pattern between NSs and active sites in the target cell protein. The findings corroborated antimicrobial test results indicating that Sr-Cr2O3 is the most effective inhibitor of FabH and DHFR enzymes.
Collapse
Affiliation(s)
- Muhammad Ikram
- Solar Cell Applications Research Lab, Department of Physics, Government College University Lahore, Lahore, Pakistan
- *Correspondence: Muhammad Ikram, ; Walid Nabgan,
| | - Anum Shahzadi
- Faculty of Pharmacy, The University of Lahore, Lahore, Pakistan
| | - Muhammad Bilal
- Solar Cell Applications Research Lab, Department of Physics, Government College University Lahore, Lahore, Pakistan
| | - Ali Haider
- Department of Clinical Sciences, Faculty of Veterinary and Animal Sciences, Muhammad Nawaz Shareef University of Agriculture, Multan, Pakistan
| | - Anwar Ul-Hamid
- Core Research Facilities, King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia
| | - Walid Nabgan
- Departament d’Enginyeria Química, Universitat Rovira i Virgili, Tarragona, Spain
- *Correspondence: Muhammad Ikram, ; Walid Nabgan,
| | - Junaid Haider
- Chinese Academy of Sciences, Tianjin Institute of Industrial Biotechnology, Tianjin, China
| | - Salamat Ali
- Department of Physics, The University of Lahore, Lahore, Pakistan
| | - Muhammad Imran
- Government College University Faisalabad, Sahiwal, Punjab, Pakistan
| |
Collapse
|
14
|
Apostolova I, Apostolov A, Wesselinowa J. Band Gap Tuning in Transition Metal and Rare-Earth-Ion-Doped TiO 2, CeO 2, and SnO 2 Nanoparticles. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 13:145. [PMID: 36616055 PMCID: PMC9824300 DOI: 10.3390/nano13010145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 12/22/2022] [Accepted: 12/24/2022] [Indexed: 06/17/2023]
Abstract
The energy gap Eg between the valence and conduction bands is a key characteristic of semiconductors. Semiconductors, such as TiO2, SnO2, and CeO2 have a relatively wide band gap Eg that only allows the material to absorb UV light. Using the s-d microscopic model and the Green's function method, we have shown two possibilities to reduce the band-gap energy Eg-reducing the NP size and/or ion doping with transition metals (Co, Fe, Mn, and Cu) or rare earth (Sm, Tb, and Er) ions. Different strains appear that lead to changes in the exchange-interaction constants, and thus to a decrease in Eg. Moreover, the importance of the s-d interaction, which causes room-temperature ferromagnetism and band-gap energy tuning in dilute magnetic semiconductors, is shown. We tried to clarify some discrepancies in the experimental data.
Collapse
Affiliation(s)
| | - Angel Apostolov
- University of Architecture, Civil Engineering and Geodesy, Hristo Smirnenski Blvd. 1, 1046 Sofia, Bulgaria
| | - Julia Wesselinowa
- Sofia University “St. Kliment Ohridski”, J. Bouchier Blvd. 5, 1164 Sofia, Bulgaria
| |
Collapse
|
15
|
Sen SK, Munshi MR, Kumar A, Mortuza AA, Manir MS, Islam MA, Hossain MN, Hossain MK. Structural, optical, magnetic, and enhanced antibacterial properties of hydrothermally synthesized Sm-incorporating α-MoO 3 2D-layered nanoplates. RSC Adv 2022; 12:34584-34600. [PMID: 36545635 PMCID: PMC9716563 DOI: 10.1039/d2ra05304g] [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: 08/24/2022] [Accepted: 11/24/2022] [Indexed: 12/04/2022] Open
Abstract
In this study, we have synthesized pristine and [0.5,1.5, and 2.5] M% samarium (Sm)-incorporating α-MoO3 2D-layered nanoplates utilizing a facile hydrothermal process, and investigated the physical properties along with antibacterial effectiveness. X-ray diffraction (XRD) patterns confirmed the single-phase, stable orthorhombic polycrystalline structure of the as-prepared samples. The crystallite size, lattice strain, and dislocation density were measured using both Debye-Scherrer (D-S) and Williamson-Hall (W-H) techniques. Both pristine and Sm-incorporating α-MoO3 samples showed two-dimensional (2D) layered nanoplate-type surface morphology, revealed by field emission scanning electron microscopy (FE-SEM) images. Energy dispersive X-ray spectroscopy (EDS) confirmed the presence of Sm contents in the α-MoO3 matrix. After Sm incorporation in α-MoO3, the different functional groups as well as vibrational groups were observed by Fourier-transform infrared (FTIR) spectroscopy and Raman spectroscopy analyses, respectively. The optical band gaps were measured from UV-vis diffuse reflectance spectroscopy (DRS) by employing the Kubelka-Munk formula and interestingly it is found that the bandgap energy (E g) gradually decreased from 2.96 to 2.83 eV with the increment of Sm content. When compared to pristine α-MoO3, the Sm-incorporating samples experienced a steady improvement in room temperature ferromagnetic (RTFM) behavior as Sm content increased, as measured by hysteresis loops. The antibacterial activities of both samples were assessed against Gram-positive: Staphylococcus aureus (S. aureus), and Gram-negative: Escherichia coli (E. coli) and Salmonella enteritidis (S. enteritidis) bacteria by the agar well diffusion method and enhanced antibacterial activity was observed as the Sm concentration increased, compared to pristine nanoplates. The obtained results suggest that the synthesized Sm-incorporating α-MoO3 2D-layered nanoplate could be a potential antibacterial agent.
Collapse
Affiliation(s)
- Sapan Kumar Sen
- Institute of Electronics, Atomic Energy Research Establishment, Bangladesh Atomic Energy CommissionDhaka 1349Bangladesh
| | - M. Rajib Munshi
- Department of Physics, European University of BangladeshDhaka 1216Bangladesh
| | - Arup Kumar
- Materials Science Division, Atomic Energy Centre, Bangladesh Atomic Energy CommissionDhaka 1000Bangladesh
| | - A. A. Mortuza
- Institute of Electronics, Atomic Energy Research Establishment, Bangladesh Atomic Energy CommissionDhaka 1349Bangladesh
| | - M. S. Manir
- Institute of Radiation and Polymer Technology, Atomic Energy Research Establishment, Bangladesh Atomic Energy CommissionDhaka 1349Bangladesh
| | - M. A. Islam
- Department of Physics, University of BarishalBarishal 8200Bangladesh
| | - M. N. Hossain
- Department of Glass & Ceramic Engineering, Bangladesh University of Engineering & TechnologyDhaka 1000Bangladesh
| | - M. Khalid Hossain
- Institute of Electronics, Atomic Energy Research Establishment, Bangladesh Atomic Energy CommissionDhaka 1349Bangladesh
| |
Collapse
|
16
|
Basaleh AS, Shawky A, Mahmoud MHH. CdO-supported ZrO 2heterojunctions: facile synthesis and rapid visible-light oxidation of atrazine herbicide with superb recyclability. NANOTECHNOLOGY 2022; 34:035701. [PMID: 36240728 DOI: 10.1088/1361-6528/ac9a57] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Accepted: 10/13/2022] [Indexed: 06/16/2023]
Abstract
The advancement in ceramic oxide-based photocatalysis has got much attention recently for environmental issues. Atrazine (AZ) is one of the major used herbicides in agricultural and related industries. This work familiarizes a polymeric-assisted sol-gel preparation of high surface area zirconium oxide (ZrO2) supported with cadmium oxide nanoparticles at minor content (0.5-2.0 wt%). Exploration of the synthesized heterostructures revealed the enhancement of visible-light absorbance and reduction of bandgap energy to 2.76 eV keeping the same crystalline form and high surface area of 170 m2g‒1. The prepared photocatalysts were used to degrade AZ in water at a concentration of 231.8μM (50 ppm). The 1.5%-introduced CdO to ZrO2revealed the best-performed photocatalyst for complete oxidation of AZ within 40 at an optimized dose of 1.6 g l-1. This novel ceramic photocatalyst showed a chemical and structural ability to keep 98.5% of its initial efficiency after five regenerated cycles. The construction of p-n heterojunction between the p-type ZrO2and the n-type CdO contributed to the comprehensive photocatalytic competence toward the efficient charge separation and photooxidation process.
Collapse
Affiliation(s)
- A S Basaleh
- Department of Chemistry, Faculty of Science, King Abdulaziz University, PO Box 80203, Jeddah, 21589, Saudi Arabia
| | - Ahmed Shawky
- Nanomaterials and Nanotechnology Department, Advanced Materials Division, Central Metallurgical R&D Institute (CMRDI), PO Box 87, Helwan, 11421, Cairo, Egypt
| | - M H H Mahmoud
- Department of Chemistry, College of Science, Taif University, PO Box 11099, Taif, 21944, Saudi Arabia
| |
Collapse
|
17
|
Dynamics of Diffusion- and Immobilization-Limited Photocatalytic Degradation of Dyes by Metal Oxide Nanoparticles in Binary or Ternary Solutions. Catalysts 2022. [DOI: 10.3390/catal12101254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Photocatalytic degradation employing metal oxides, such as TiO2 nanoparticles, as catalysts is an important technique for the removal of synthetic dyes from wastewater under light irradiation. The basic principles of photocatalysis of dyes, the effects of the intrinsic photoactivity of a catalyst, and the conventional non-fundamental factors are well established. Recently reported photocatalysis studies of dyes in single, binary, and ternary solute solutions opened up a new perspective on competitive photocatalytic degradation of the dyes. There has not been a review on the photocatalytic behavior of binary or ternary solutions of dyes. In this regard, this current review article summarizes the photocatalytic behavior of methylene, rhodamine B, and methyl orange in their binary or ternary solutions. This brief overview introduces the importance of the dynamics of immobilization and reactivity of the dyes, the vital roles of molecular conformation and functional groups on their diffusion onto the catalyst surface, and photocatalytic degradation, and provides an understanding of the simultaneous photocatalytic processes of multiple dyes in aqueous systems.
Collapse
|
18
|
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.
Collapse
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
| |
Collapse
|
19
|
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.
Collapse
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
| |
Collapse
|
20
|
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
| |
Collapse
|
21
|
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
| |
Collapse
|
22
|
Waheed IF, Yasin Thayee Al-Janabi O, Foot PJ. Novel MgFe2O4-CuO/GO heterojunction magnetic nanocomposite: Synthesis, characterization, and batch photocatalytic degradation of methylene blue dye. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119084] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
|
23
|
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.
Collapse
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
| |
Collapse
|
24
|
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.
Collapse
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
| |
Collapse
|
25
|
Photocatalytic Behavior of Supported Copper Double Salt: The Role of Graphene Oxide. J CHEM-NY 2022. [DOI: 10.1155/2022/7844259] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The design of a photocatalyst that may work efficiently with sunlight is a fundamental concern to fight against environmental pollution and electrochemical hydrogen storage devices. In this work, it has been found that the green microwave-assisted decoration of graphene by copper double salt (DS) enhances visible sunlight photocatalysis efficiency. Nanohybrids of graphene oxide decorated with Cu(I) and Cu(II) oxides and copper hydroxy nitrate double salt were selected as photocatalysts for the degradation of rhodamine B in aqueous solution to study the effect of the graphene oxide support. The photodegradation process followed a pseudo–first-order kinetics for the bare catalysts, but the supported catalysts were best fitted to the Langmuir-Hinshelwood model. Supported systems were more efficient in terms of turnover and apparent rate constants. Diffuse reflectance spectroscopy with the use of Kubelka-Munk function allowed to measure bandgap energies. It was found that the absorption edge was reduced about 30% for the supported systems.
Collapse
|
26
|
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.
Collapse
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
| |
Collapse
|
27
|
Modulated Antimicrobial Activity and Drug-Protein Interaction Ability of Zinc Oxide and Cadmium Sulfide Nanoparticles: Effect of Doping with Few First-Row Transition Metals. J CLUST SCI 2022. [DOI: 10.1007/s10876-022-02257-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
|
28
|
Jain SK, Fazil M, Naaz F, Pandit NA, Ahmed J, Alshehri SM, Mao Y, Ahmad T. Silver-doped SnO 2 nanostructures for photocatalytic water splitting and catalytic nitrophenol reduction. NEW J CHEM 2022. [DOI: 10.1039/d1nj05432e] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Driven by the quest of renewable and clean energy sources, researchers around the globe are seeking solutions to replace non-renewable fossil fuels to meet the ever-increasing energy supply requirements and solve the relevant environment concerns.
Collapse
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
| | - Farha Naaz
- 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
| | - 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, IL 60616, USA
| | - Tokeer Ahmad
- Nanochemistry Laboratory, Department of Chemistry, Jamia Millia Islamia, New Delhi 110025, India
| |
Collapse
|