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Kumar Sahu A, Yadav S, Banerjee D, Rufford TE, Upadhyayula S. Accelerating Charge Separation and CO 2 Photoreduction in Aqueous Phase under Visible Light with Ru Nanoparticles Loaded on Ga-Doped NiTiO 3 in a Batch Photoreactor. ACS APPLIED MATERIALS & INTERFACES 2024; 16:7057-7069. [PMID: 38308562 DOI: 10.1021/acsami.3c15915] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2024]
Abstract
Titanate perovskite (ATiO3) semiconductors show prospects of being active photocatalysts in the conversion of CO2 to chemical fuels such as methanol (CH3OH) in the aqueous phase. Some of the challenges in using ATiO3 are limited light-harvesting capability, rapid bulk charge recombination, and the low density of catalytic sites participating in CO2 reduction. To address these challenges, Ga-doped NiTiO3 (GNTO) photocatalysts in which Ga ions substitute for Ti ions in the crystal lattice to form electron trap states and oxygen vacancies have been synthesized in this work. The synthesized GNTO was then loaded with Ru nanoparticles to accelerate charge separation and enable excellent CO2 photoreduction activity under visible light. CO2 photoreduction was conducted in a batch photoreactor charged with a 0.1 M NaHCO3 aqueous solution at room temperature and a 3.5 bar pressure using a 1.0 wt % Ru-GNTO photocatalyst to yield methanol at a rate of 84.45 μmol g-1 h-1. A small amount of methane was produced as a side product at 21.35 μmol g-1 h-1, which is also a fuel molecule. We attribute this high catalytic activity toward CO2 photoreduction to a synergistic combination of our novel heterostructured 1.0 wt % Ru-GNTO photocatalyst and the implementation of a pressurized photoreactor. This work demonstrates an effective strategy for metal doping with active nanospecies functionality to improve the performance of ATiO3 photocatalysts in valorizing CO2 to solar fuels.
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Affiliation(s)
- Aloka Kumar Sahu
- The University of Queensland─IIT Delhi Academy of Research (UQIDAR), Hauz Khas 110016, New Delhi, India
- Department of Chemical Engineering, Indian Institute of Technology Delhi, Hauz Khas 110016, New Delhi, India
- School of Chemical Engineering, The University of Queensland, Brisbane QLD 4072, St Lucia, Australia
| | - Sushant Yadav
- Department of Chemical Engineering, Indian Institute of Technology Delhi, Hauz Khas 110016, New Delhi, India
| | - Debarun Banerjee
- Department of Chemical Engineering, Indian Institute of Technology Delhi, Hauz Khas 110016, New Delhi, India
| | - Thomas E Rufford
- School of Chemical Engineering, The University of Queensland, Brisbane QLD 4072, St Lucia, Australia
- ARC Centre of Excellence for Green Electrochemical Transformation of Carbon Dioxide, The University of Queensland, Brisbane QLD 4072, St Lucia, Australia
| | - Sreedevi Upadhyayula
- Department of Chemical Engineering, Indian Institute of Technology Delhi, Hauz Khas 110016, New Delhi, India
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Subramanian S, Ganapathy S, Dharmalingam S, Subramanian S, Ayyaswamy A. Enhanced charge carrier transfer process in nickel titanate nanostructures for environmental remediation of industrial dye. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023:10.1007/s11356-023-27337-y. [PMID: 37140870 DOI: 10.1007/s11356-023-27337-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Accepted: 04/26/2023] [Indexed: 05/05/2023]
Abstract
The effective charge carrier transfer process in one-dimensional (1D) NiTiO3 nanofibers and NiTiO3 nanoparticles was demonstrated experimentally, showcasing an effective photocatalytic enhancement under visible light ambience. The rhombohedral crystal structure of NiTiO3 nanostructures was confirmed using X-ray diffractometer (XRD). The morphology and optical characteristics of the synthesized nanostructures were characterized using scanning electron microscopy (SEM) and UV-visible spectroscopy (UV-Vis). Nitrogen adsorption-desorption analysis corresponding to NiTiO3 nanofibers showcased porous structures with an average pore size of ~3.9 nm. The photoelectrochemical (PEC) measurement studies revealed an enhanced photocurrent for the NiTiO3 nanostructures, confirming enhanced charge carriers transportation in fibers than in particles due to the delocalized electrons in the conduction band, thereby hindering the photoexcited charge carrier's recombination. The photodegradation efficiency of methylene blue (MB) dye under the visible light irradiation revealed an enhancement in the rate of degradation for NiTiO3 nanofibers when compared to NiTiO3 nanoparticles.
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Affiliation(s)
- Suguna Subramanian
- Crystal Growth Centre, Anna University, Chennai, Tamil Nadu, 600 025, India
| | - Sasikala Ganapathy
- Crystal Growth Centre, Anna University, Chennai, Tamil Nadu, 600 025, India.
| | - Sangeetha Dharmalingam
- Department of Mechanical Engineering, Anna University, Chennai, Tamil Nadu, 600 025, India
| | | | - Arivarasan Ayyaswamy
- Multifunctional Materials Laboratory, Department of Physics, International Research Centre, Kalasalingam Academy of Research and Education, Krishnankoil, Tamil Nadu, 626126, India
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Bastia S, Moses YT, Kumar N, Mishra RP, Chaudhary YS. Enhanced Nitrogen Reduction to Ammonia by Surface- and Defect-Engineered Co-catalyst-Modified Perovskite Catalysts under Ambient Conditions and Their Charge Carrier Dynamics. ACS APPLIED MATERIALS & INTERFACES 2023; 15:13052-13063. [PMID: 36853145 DOI: 10.1021/acsami.2c22193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
An electrocatalytic nitrogen reduction reaction is considered a potential approach for green ammonia production─a zero-carbon fertilizer, fuel, and energy storage for renewable energy. To harness the synergistic properties of perovskites, the inherent dipole moment due to their non-centrosymmetric structure (that facilitates better charge separation), oxygen vacancies, and the presence of Ni metal sites that permit activation and reduction of N2 efficiently, the NiTiO3-based nanoelectrocatalysts have been synthesized. Further, these catalysts have been modified with ultra-small metal nanocrystal co-catalysts to form heterointerfaces that not only aid to improve the charge separation but also activate N2 and lower overpotential requirements. The appearance of peaks corresponding to (012), (104), (110), (11-3), (024), (11-6), (018), (027), and (300) confirms the formation of rhombohedral NiTiO3. The shift in the XRD peak corresponding to the (104) plane to a smaller 2θ value and peak shifting and widening of Raman spectra imply the lattice distortion that signifies the formation of Pd-NiTiO3 and Pt-NiTiO3 heterojunction electrocatalysts with the loadings of 0.4 and 0.3 wt % of Pd and Pt, respectively, as confirmed by ICP-OES analysis. The detailed XPS analysis reveals the presence of Pd (0), Pd (II), and Pt (0), Pt (II) in respective electrocatalysts. The appearance of XPS peaks at 528.7 and 531.1 eV suggests the presence of oxidative oxygen species (O2-/O-) and the presence of oxygen defects due to oxygen vacancy. The detailed nitrogen reduction (NRR) investigation exhibits a 5-fold enhancement in ammonia yield rate (∼14.28 μg h-1 mg-1 at -0.003 V vs RHE), a faradic efficiency of 27% (at 0.097 V vs RHE) for Pd-NiTiO3 electrocatalysts than that for bare NiTiO3 (3.08 μg h-1 mg-1), and 9-folds higher than that of the activity shown by the commercial TiO2 (P25) (1.52 μg h-1mg-1). The formation of ammonia was further confirmed by using isotopic nitrogen as the feeding gas. Furthermore, the highest NRR is observed at lower cathodic potential (-0.003 V vs RHE) in the case of the Pd-NiTiO3 electrocatalyst than that of the Pt-NiTiO3 electrocatalyst (-0.203 V vs RHE), implying significantly reduced overpotential requirement. Such enhanced NRR activity with lower overpotential requirement in the case of the Pd-NiTiO3 electrocatalyst is due to efficient charge separation as shown by the semicircle Nyquist plot, decreased photoluminescence emission intensity, shorter average lifetime (∼29 ns) of excitons, appropriate band bending, and improved activation of N2 by the oxygen vacancies and heterointerface formed between Pd nanocrystals and NiTiO3. Furthermore, no change is observed in the current density, after stabilization in the initial few seconds, even up to 2 h, which signifies that these electrocatalysts are stable. The structural and morphological integrity of the optimized catalyst remained even after the nitrogen reduction reactions, as revealed by no significant change observed in FESEM, elemental mapping, and EDS analysis.
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Affiliation(s)
- Sweta Bastia
- Materials Chemistry Department, CSIR-Institute of Minerals and Materials Technology, Bhubaneswar 751013, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201 002, India
| | - Yilleng Titus Moses
- Materials Chemistry Department, CSIR-Institute of Minerals and Materials Technology, Bhubaneswar 751013, India
- Department of Chemistry, Kaduna State University, Kaduna 2339, PMB, Nigeria
| | - Niharika Kumar
- Materials Chemistry Department, CSIR-Institute of Minerals and Materials Technology, Bhubaneswar 751013, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201 002, India
| | - Rajashree P Mishra
- Materials Chemistry Department, CSIR-Institute of Minerals and Materials Technology, Bhubaneswar 751013, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201 002, India
| | - Yatendra S Chaudhary
- Materials Chemistry Department, CSIR-Institute of Minerals and Materials Technology, Bhubaneswar 751013, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201 002, India
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Superior Photocatalytic Activity of BaO@Ag3PO4 Nanocomposite for Dual Function Degradation of Methylene Blue and Hydrogen Production under Visible Light Irradiation. Catalysts 2023. [DOI: 10.3390/catal13020363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023] Open
Abstract
The current work focuses on the photo degradation of organic pollutants, particularly methylene blue (MB) dye, and the production of hydrogen as green energy using a composite of silver phosphate Ag3PO4 (AP) and barium oxide/silver phosphate BaO@Ag3PO4 (APB) as a photocatalyst. This composite was successfully synthesized using a chemical co-precipitation approach. The physicochemical properties of the obtained samples were investigated using scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), ultraviolet–visible diffuse reflectance spectroscopy (UV–Vis/DRS), and photoluminescence (PL) spectrophotometry. From XRD, the average crystallite sizes of AP and APB are 39.1 and 46 nm, respectively, with a homogeneous morphology detected by SEM. UV and PL experiments showed that the compound is active under visible light, with an improvement in the lifetimes of the electrons and the holes in the presence of BaO with Ag3PO4. The as-synthesized APB photocatalyst sample showed a remarkably high degradation efficiency of MB (20 ppm, 50 mL) of around 94%, with a hydrogen production yield of around 7538 μmol/(h·g), after 120 min of illumination, which is greater than the degradation efficiency of the AP photocatalyst sample, which was about 88%. The high photodegradation efficiency was attributed to the electronic promotion effect of the BaO particles. The APB composite demonstrated an increased photocatalytic performance in effectively degrading an organic dye (MB) with no secondary pollutants when exposed to visible light irradiation.
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Passi M, Pal B. Design of a novel Ag-BaTiO3/GO ternary nanocomposite with enhanced visible-light driven photocatalytic performance towards mitigation of carcinogenic organic pollutants. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.122839] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Environmentally-friendly carbon nanomaterials for photocatalytic hydrogen production. CHINESE JOURNAL OF CATALYSIS 2022. [DOI: 10.1016/s1872-2067(21)63994-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Khan H, Charles H, Lee CS. Synergistic effect stemming from vertically anchored seamless 2D MoSe2 nanosheets on 1D NiTiO3 nanofibers toward CO2 photoreduction. J CO2 UTIL 2022. [DOI: 10.1016/j.jcou.2022.102058] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Saleh R, Andiane Hidayat S, Taufik A, Yin S. Removal of multiple pollutants from water using noble Ag/Au/magnetite/graphene/H2O2 system under light and ultrasound irradiation. ARAB J CHEM 2022. [DOI: 10.1016/j.arabjc.2022.103881] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022] Open
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Zare A, Behaein S, Moradi M, Hosseini Z. Application of a dual functional blocking layer for improvement of the responsivity in a self-powered UV photodetector based on TiO 2 nanotubes. RSC Adv 2022; 12:9909-9916. [PMID: 35424944 PMCID: PMC8963264 DOI: 10.1039/d2ra00379a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Accepted: 03/22/2022] [Indexed: 11/21/2022] Open
Abstract
A layer of graphene quantum dots (GQDs) was applied on the photoanode of a self-powered photoelectrochemical (PEC) UV photodetector based on TiO2 nanotubes (NTs). The GQDs layer acted as a dual functional layer and improved the photodetector performance by both UV light absorption and blocking the charge carriers recombination at the photoanode/electrolyte interface. The short circuit current density (Jsc) and thereby the responsivity of the PEC UV photodetector was enhanced by 473%. The highest value of the responsivity in this work obtained for the PEC UV photodetector with the dual functional GQDs layer was as much as 42.5 mA W−1. This value is far better than previously reported responsivities of the PEC devices based on TiO2 NTs as a photoanode. This high responsivity was obtained under the illumination of a very low intensity UV light (365 nm, 2 mW cm−2) and 0 V bias. Moreover, the sensitivity of the PEC UV photodetector with the dual functional GQDs layer has been improved by 345%, which is almost 3.5 times higher compared to the sensitivity of its counterpart without the GQDs coating. The devices with the dual functional GQDs layer present a splendid repeatability and stability. The rise time and the decay time of this device were measured to be 0.73 s and 0.88 s under the on/off switching UV LEDs, respectively. The electrochemical impedance spectroscopy (EIS) results prove the role of the GQDs layer as an effective blocking layer on the photoanode, hindering the charge carrier recombination at the photoanode/electrolyte interface. This study shows that application of the dual functional GQDs layer in the PEC UV photodetector based on TiO2 NTs is an effective approach for improving the responsivity and sensitivity of a self-powered PEC UV PD, which brought us the possibility of detecting low UV index radiation and using the self-powered photodetectors in cutting-edge wearable electronic devices for the aim of health, safety and environmental monitoring. A layer of graphene quantum dots (GQDs) was applied on the photoanode of a self-powered photoelectrochemical (PEC) UV photodetector based on TiO2 nanotubes (NTs).![]()
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Affiliation(s)
- Alireza Zare
- Faculty of Advanced Technologies, Shiraz University P.O. Box: 7194684560 Shiraz Iran
| | - Saeed Behaein
- Physics Department, School of Science, Shiraz University Shiraz Iran
| | - Mahmoud Moradi
- Physics Department, School of Science, Shiraz University Shiraz Iran
| | - Zahra Hosseini
- Faculty of Advanced Technologies, Shiraz University P.O. Box: 7194684560 Shiraz Iran
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10
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Hosseini SM, Mazinani S, Abdouss M, Kalhor H, Kalantari K, Amiri IS, Ramezani Z. Designing chitosan nanoparticles embedded into graphene oxide as a drug delivery system. Polym Bull (Berl) 2022. [DOI: 10.1007/s00289-020-03506-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Liquid “Syngas” Based on Supercritical Water and Graphite Oxide/TiO2 Composite as Catalyst for CO2 to Organic Conversion. Catal Letters 2021. [DOI: 10.1007/s10562-021-03858-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
AbstractThe conversion of carbon monoxide into organic substances is one of the top topics of modern science due to the development of industry and the climate changes caused by it on the one hand, and the possibility of obtaining an economic effect on the other, as it could allow for partial recovery of fuels. A problem in this regard has always been the low solubility of CO2 in water, which eliminated the possibility of easy converting carbon dioxide into the liquid. The development of research on water critical states revealed the fact that water in a subcritical state has a much higher ability to dissolve gases. And this effect was used to obtain the "liquid synthesis gas" model presented in this paper. Equally important was the selection of an appropriate catalyst that would increase the efficiency of the conversion process by generating hydrogen in the system under the influence of cold plasma. In this work we present the studies of transformation of CO2 dissolved in supercritical water using partially reduced graphite oxide—nanometric titania composite (RGO-TiO2) as catalyst, due to the ability of RGO to generate hydrogen in the water environment (water splitting) under the influence of various physical factors, especially cold plasma. The RGO catalyst was stabilized with titanium oxide to obtain higher activity at lower RGO concentrations in the system. Therefore, research on conversions was preceded by a thorough analysis of CO2 solubility in supercritical water, as well as an analysis of the structural, morphological, and spectroscopic properties of the catalyst.
Graphic Abstract
General scheme of cold plasma reactor.
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Fabrication of novel Cu 2WS 4/NiTiO 3 heterostructures for efficient visible-light photocatalytichydrogen evolution and pollutant degradation. J Colloid Interface Sci 2021; 613:194-206. [PMID: 35033765 DOI: 10.1016/j.jcis.2021.10.179] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Revised: 10/22/2021] [Accepted: 10/28/2021] [Indexed: 12/28/2022]
Abstract
The design and development of efficient and durable catalysts with visible-light response for photocatalytic hydrogen production and pollutants degradation is considered as one of the most challenging tasks. In present work, a novel Cu2WS4/NiTiO3 (abbreviated as × CWS/NTO; x = 0.25, 0.50, 0.75 and 1.00) composite was prepared via a facile electrospinning/calcination technique along with a convenient hydrothermal method. The as-prepared CWS/NTOcomposite was composed of 2D CWS nanosheets and 1D NTO nanofibers manifested by SEM and TEM images. The results of XPS verified the interfacial interaction between CWS and NTO, confirming the heterojunction formation in CWS/NTOcomposite. Photocatalytic tests demonstrated as-prepared CWS/NTO catalysts exhibited outstanding and stable photocatalytic performances for H2 production and pollutants degradation under visible light (λ > 420 nm) irradiation. Specially, 0.50 CWS/NTO sample displayed the highest H2-evolution activity of 810 μmol·g-1·h-1 with the apparent quantum efficiency (AQE) value of 1.65 % at 420 nm. Additionally, it also exhibited the optimal photodegradation properties with the rate constants of 0.030, 0.413 and 0.028 min-1 for TC, RhB and Cr(VI), respectively. The excellent catalytic activities could be attributed to the enhanced visible-light adsorption, high specific surface area and efficient separation of photogenerated charge carriers. The ESR tests and free radicals capturing experiments confirmed that ·O2- and h+ were primary active species for TC/RhB degradation. Eventually, the probable catalytic mechanism was put forward and detailly analysed. The present work provides perspectives of rational design on NiTiO3-based catalysts with superior photocatalytic performance for energy regeneration and environmental remediation.
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Subramanian S, Ganapathy S, Subramanian S, Ramasamy T, Ramasamy J. Enhancement in visible light photocatalytic performance using silver-decorated nickel titanate nanofiber composite. INORG CHEM COMMUN 2021. [DOI: 10.1016/j.inoche.2021.108821] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Akbarzadeh MJ, Hashemian S, Moktarian N. Structural and magnetic properties of zeolitic imidazolate framework supported on nickel titanate. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.130555] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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15
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Magnetic ZnO Crystal Nanoparticle Growth on Reduced Graphene Oxide for Enhanced Photocatalytic Performance under Visible Light Irradiation. Molecules 2021; 26:molecules26082269. [PMID: 33919832 PMCID: PMC8070817 DOI: 10.3390/molecules26082269] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Revised: 04/08/2021] [Accepted: 04/09/2021] [Indexed: 11/17/2022] Open
Abstract
Magnetite zinc oxide (MZ) (Fe3O4/ZnO) with different ratios of reduced graphene oxide (rGO) was synthesized using the solid-state method. The structural and optical properties of the nanocomposites were analyzed using transmission electron microscopy (TEM), X-ray diffraction (XRD), Raman spectroscopy, Fourier-transform infrared spectroscopy (FTIR), ultraviolet-visible diffuse reflectance spectroscopy (UV-Vis/DRS), and photoluminescence (PL) spectrophotometry. In particular, the analyses show higher photocatalytic movement for crystalline nanocomposite (MZG) than MZ and ZnO nanoparticles. The photocatalytic degradation of methylene blue (MB) with crystalline ZnO for 1.5 h under visible light was 12%. By contrast, the photocatalytic activity for MZG was more than 98.5%. The superior photocatalytic activity of the crystalline nanocomposite was detected to be due to the synergistic effect between magnetite and zinc oxide in the presence of reduced graphene oxide. Moreover, the fabricated nanocomposite had high electron-hole stability. The crystalline nanocomposite was stable when the material was used several times.
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Moradi M, Vasseghian Y, Khataee A, Harati M, Arfaeinia H. Ultrasound‐assisted synthesis of FeTiO3/GO nanocomposite for photocatalytic degradation of phenol under visible light irradiation. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2020.118274] [Citation(s) in RCA: 66] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Jones BMF, Mamba G, Ansari SA, Maruthamani D, Muthuraj V, Nkambule TTI. Simple fabrication and unprecedented visible light response of NiNb 2O 6/RGO heterojunctions for the degradation of emerging pollutants in water. NEW J CHEM 2021. [DOI: 10.1039/d1nj04693d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Utilization of environmentally friendly and effective synthesis methods to fabricate visible light responsive photocatalysts with impressive catalytic performance is desirable in photocatalytic water treatment.
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Affiliation(s)
- Benjamin Moses Filip Jones
- Department of Chemistry, V. H. N. Senthikumara Nadar College (Autonomous), Virudhunagar-626 001, Tamil Nadu, India
| | - G. Mamba
- Institute for Nanotechnology and Water Sustainability, College of Science, Engineering and Technology, University of South Africa, Florida, 1709, Johannesburg, South Africa
| | - Sajid Ali Ansari
- Department of Physics, College of Science, King Faisal University, P. O. Box 400, Hofuf, Al-Ahsa 31982, Saudi Arabia
| | - D. Maruthamani
- Department of Chemistry, PSG College of Technology, Coimbatore – 641 004, India
| | - V. Muthuraj
- Department of Chemistry, V. H. N. Senthikumara Nadar College (Autonomous), Virudhunagar-626 001, Tamil Nadu, India
| | - T. T. I. Nkambule
- Institute for Nanotechnology and Water Sustainability, College of Science, Engineering and Technology, University of South Africa, Florida, 1709, Johannesburg, South Africa
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Jelokhani F, Sheibani S, Ataie A. Adsorption and photocatalytic characteristics of cobalt ferrite-reduced graphene oxide and cobalt ferrite-carbon nanotube nanocomposites. J Photochem Photobiol A Chem 2020. [DOI: 10.1016/j.jphotochem.2020.112867] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Kumar A, Kumar A, Krishnan V. Perovskite Oxide Based Materials for Energy and Environment-Oriented Photocatalysis. ACS Catal 2020. [DOI: 10.1021/acscatal.0c02947] [Citation(s) in RCA: 205] [Impact Index Per Article: 51.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Ashish Kumar
- School of Basic Sciences and Advanced Materials Research Center, Indian Institute of Technology Mandi, Kamand, Mandi, Himachal Pradesh 175075, India
| | - Ajay Kumar
- School of Basic Sciences and Advanced Materials Research Center, Indian Institute of Technology Mandi, Kamand, Mandi, Himachal Pradesh 175075, India
| | - Venkata Krishnan
- School of Basic Sciences and Advanced Materials Research Center, Indian Institute of Technology Mandi, Kamand, Mandi, Himachal Pradesh 175075, India
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Thermal stability and dielectric relaxation behavior of in situ prepared poly(vinyl alcohol) (PVA)-reduced graphene oxide (RGO) composites. Colloid Polym Sci 2020. [DOI: 10.1007/s00396-020-04718-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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21
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Pato AH, Balouch A, Talpur FN, Abdullah, Mahar AM, Shah MT, Kumar A, Fahad, Qasim S, Gabole AA. Synthesis and catalytic practicality of titania@ITO-grown nanoflakes: an excellent candidate for isopropanol conversion to acetone. APPLIED NANOSCIENCE 2019. [DOI: 10.1007/s13204-019-01200-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Li Y, Xu J, Peng M, Liu Z, Li X, Zhao S. MoS2/NiTiO3 Heterojunctions as Photocatalysts: Improved Charge Separation for Promoting Photocatalytic Hydrogen Production Activity. CATALYSIS SURVEYS FROM ASIA 2019. [DOI: 10.1007/s10563-019-09282-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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Comparative Study on the Removal of Cationic Dyes Using Different Graphene Oxide Forms. J Inorg Organomet Polym Mater 2019. [DOI: 10.1007/s10904-019-01140-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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Alizadeh S, Fallah N, Nikazar M. An ultrasonic method for the synthesis, control and optimization of CdS/TiO2 core–shell nanocomposites. RSC Adv 2019; 9:4314-4324. [PMID: 35520179 PMCID: PMC9060541 DOI: 10.1039/c8ra10155h] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Accepted: 01/17/2019] [Indexed: 11/26/2022] Open
Abstract
In this study, an ultrasonic method was utilized in combination with microemulsion to synthesize CdS/TiO2 core–shell nanoparticles and control their particle size and ultimately optimize the influential parameters. Moreover, response surface methodology (RSM) was used to optimize the thickness of the shell. Herein, four parameters, i.e. temperature (67–79 °C), synthesis retention time (45–105 min), TiO2 : CdS ratio (1.5–7.5) and the power of ultrasound waves (37–53 watt), were optimized to synthesize nanoparticles with an average size of up to 10 nm. A correlation equation was introduced for the size range of 10–90 nm, which was then proven to have excellent predictions. To verify the proposed model, two different sets of combinations were selected to synthesize 10 nm composites, and consequently, nanocomposites with the sizes of 10.4 and 10.9 nm were successfully synthesized. The power of ultrasound waves and retention time had the most influence on the size of the particles. Further experiments proved that the optical absorption spectrum of the composite particles was extended to the visible region. Furthermore, the formation of CdS/TiO2 core–shell nanocomposites was confirmed by different characterization techniques including XRD, TEM, EDAX, UV-vis, FTIR and DLS. In this study, an ultrasonic method was utilized in combination with microemulsion to synthesize CdS/TiO2 core–shell nanoparticles and control their particle size and ultimately optimize the influential parameters.![]()
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Affiliation(s)
- Sajad Alizadeh
- Chemical Engineering Department
- Amirkabir University of Technology
- Tehran
- Iran
| | - Narges Fallah
- Chemical Engineering Department
- Amirkabir University of Technology
- Tehran
- Iran
| | - Manochehr Nikazar
- Chemical Engineering Department
- Amirkabir University of Technology
- Tehran
- Iran
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