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Jarvin M, Rosaline DR, Gopalakrishnan T, Kamalam MBR, Foletto EL, Dotto GL, Inbanathan SSR. Remarkable photocatalytic performances towards pollutant degradation under sunlight and enhanced electrochemical properties of TiO 2/polymer nanohybrids. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:62832-62846. [PMID: 36947375 DOI: 10.1007/s11356-023-26486-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Accepted: 03/11/2023] [Indexed: 05/10/2023]
Abstract
In this work, TiO2-based nanocomposites containing polyaniline (PANI), poly(1-naphthylamine) (PNA), and polyindole (PIN) were synthesized by effective and simple routes and posteriorly employed as photocatalysts and supercapacitors. Characterization techniques such as XRD, FTIR, FESEM, UV, and PL were employed to investigate the structural, morphological, and optical properties of materials. XRD analysis confirmed the successful formation of TiO2 and TiO2/polymer nanocomposites. PANI, PNA, and PIN polymers were well distributed on the surface of TiO2 nanoparticles and were investigated/explored from the FESEM analysis. The visible light absorption and the recombination rate of photogenerated charge carriers were confirmed by the UV-Vis and PL analysis. The photocatalytic properties of the nanocomposites were investigated towards malachite green (MG) dye degradation under sunlight. The dye degradation efficiency followed the order TiO2/PNA > TiO2/PANI > TiO2 > TiO2/PIN. The higher efficiency of TiO2/PNA can be associated with its smaller bandgap energy compared to the other materials. Electrochemical properties of materials were also examined by cyclic voltammetry and galvanostatic charge-discharge measurements using a three-electrode experiment setup in an aqueous electrolyte. TiO2/PNA nanocomposite showed higher supercapacitor behavior compared to the other materials due to higher electrical conductivity of PNA and redox potential of TiO2 (pseudocapacitance).
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Affiliation(s)
- Mariadhas Jarvin
- Post Graduate and Research Department of Physics, The American College, Madurai, 625002, Tamil Nadu, India
| | - Daniel Rani Rosaline
- Post Graduate and Research Department of Chemistry, Lady Doak College, Madurai, 625002, Tamil Nadu, India
| | | | | | - Edson Luiz Foletto
- Chemical Engineering Department, Federal University of Santa Maria, Santa Maria, 97105-900, Brazil
| | - Guilherme Luiz Dotto
- Chemical Engineering Department, Federal University of Santa Maria, Santa Maria, 97105-900, Brazil.
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Lizeth Katherine TN, Vendula B, Jaroslav K, Jaroslav C. Structure and Photocatalytic Properties of Ni-, Co-, Cu-, and Fe-Doped TiO 2 Aerogels. Gels 2023; 9:gels9050357. [PMID: 37232949 DOI: 10.3390/gels9050357] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 04/19/2023] [Accepted: 04/20/2023] [Indexed: 05/27/2023] Open
Abstract
TiO2 aerogels doped with Ni, Co, Cu, and Fe were prepared, and their structure and photocatalytic activity during the decomposition of a model pollutant, acid orange (AO7), were studied. After calcination at 500 °C and 900 °C, the structure and composition of the doped aerogels were evaluated and analyzed. XRD analysis revealed the presence of anatase/brookite and rutile phases in the aerogels along with other oxide phases from the dopants. SEM and TEM microscopy showed the nanostructure of the aerogels, and BET analysis showed their mesoporosity and high specific surface area of 130 to 160 m2·g-1. SEM-EDS, STEM-EDS, XPS, EPR methods and FTIR analysis evaluated the presence of dopants and their chemical state. The concentration of doped metals in aerogels varied from 1 to 5 wt.%. The photocatalytic activity was evaluated using UV spectrophotometry and photodegradation of the AO7 pollutant. Ni-TiO2 and Cu-TiO2 aerogels calcined at 500 °C showed higher photoactivity coefficients (kaap) than aerogels calcined at 900 °C, which were ten times less active due to the transformation of anatase and brookite to the rutile phase and the loss of textural properties of the aerogels.
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Affiliation(s)
- Tinoco Navarro Lizeth Katherine
- CEITEC-Central European Institute of Technology, Brno University of Technology, Purkynova 656/123, 612 00 Brno, Czech Republic
| | - Bednarikova Vendula
- CEITEC-Central European Institute of Technology, Brno University of Technology, Purkynova 656/123, 612 00 Brno, Czech Republic
| | - Kastyl Jaroslav
- CEITEC-Central European Institute of Technology, Brno University of Technology, Purkynova 656/123, 612 00 Brno, Czech Republic
| | - Cihlar Jaroslav
- CEITEC-Central European Institute of Technology, Brno University of Technology, Purkynova 656/123, 612 00 Brno, Czech Republic
- Institute of Materials Science and Engineering, Brno University of Technology, Technicka 2, 616 69 Brno, Czech Republic
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Castañeda C, Santos D, Hernández JS, Álvarez A, Rojas H, Gómez R, Rajabi F, Martínez JJ, Luque R. Efficient NiO/F-TiO 2 nanocomposites for 4-chlorophenol photodegradation. CHEMOSPHERE 2023; 315:137606. [PMID: 36574787 DOI: 10.1016/j.chemosphere.2022.137606] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Revised: 11/25/2022] [Accepted: 12/17/2022] [Indexed: 06/17/2023]
Abstract
This work aimed to study NiO/F-TiO2 composites in the photocatalytic degradation of 4-chlorophenol. F-TiO2 support was prepared by in-situ fluorination of TiO2 using the sol-gel method. The heterostructured materials were prepared by wet impregnation method, varying NiO content (0.5, 1.0, and 2.0% wt). The solids were characterized by X-ray fluorescence, X-ray diffraction, nitrogen physisorption, diffuse reflectance UV-Vis spectrophotometry, infrared spectroscopy, and X-ray photoelectron spectroscopy. The characterization studies showed that the coupling of TiO2 with fluoride ions promoted the generation of ≡Ti-F surface species that could be responsible for the decrease in the recombination frequency of charge carriers and the increased photoactivity. In addition, it was found that the coupling of NiO/F-TiO2 semiconductors improved the photocatalytic properties of the fluorinated support, obtaining higher percentages of degradation and mineralization of the phenolic contaminant. These results are possibly a consequence of factors such as the formation of larger crystallites, lower band gap energies, and the generation of p-n type interfacial heterojunctions that potentiate the proper separation of electron-hole pairs. An effect of NiO content on photoactivity was observed, being a percentage of 1.0% wt the optimum in this photocatalytic treatment.
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Affiliation(s)
- Claudia Castañeda
- Universidad Pedagógica y Tecnológica de Colombia, Escuela de Ciencias Química, Grupo de Catálisis-UPTC, Avenida Central de Norte, Vía Paipa, Boyacá, Tunja, Colombia.
| | - Diana Santos
- Universidad Pedagógica y Tecnológica de Colombia, Escuela de Ciencias Química, Grupo de Catálisis-UPTC, Avenida Central de Norte, Vía Paipa, Boyacá, Tunja, Colombia
| | - J Sebastián Hernández
- Universidad Pedagógica y Tecnológica de Colombia, Escuela de Ciencias Química, Grupo de Catálisis-UPTC, Avenida Central de Norte, Vía Paipa, Boyacá, Tunja, Colombia
| | - Andrés Álvarez
- Universidad Pedagógica y Tecnológica de Colombia, Escuela de Ciencias Química, Grupo de Catálisis-UPTC, Avenida Central de Norte, Vía Paipa, Boyacá, Tunja, Colombia
| | - Hugo Rojas
- Universidad Pedagógica y Tecnológica de Colombia, Escuela de Ciencias Química, Grupo de Catálisis-UPTC, Avenida Central de Norte, Vía Paipa, Boyacá, Tunja, Colombia
| | - Ricardo Gómez
- Universidad Autónoma Metropolitana-Iztapalapa, Depto. De Química, D.F. México, Mexico
| | - Fatemeh Rajabi
- Department of Science, Payame Noor University, P.O. Box 19395-4697, Tehran, Iran
| | - José J Martínez
- Universidad Pedagógica y Tecnológica de Colombia, Escuela de Ciencias Química, Grupo de Catálisis-UPTC, Avenida Central de Norte, Vía Paipa, Boyacá, Tunja, Colombia
| | - Rafael Luque
- Grupo FQM-383, Departamento de Química Orgánica, Universidad de Córdoba, Campus Universitario de Rabanales, Edificio Marie Curie (C3), E-14014, Córdoba, Spain; Universidad ECOTEC, Km 13.5 Samborondón, Samborondón, EC0922302, Ecuador
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Partially Reduced Ni-NiO-TiO2 Photocatalysts for Hydrogen Production from Methanol–Water Solution. Catalysts 2023. [DOI: 10.3390/catal13020293] [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
The study compares the photocatalytic behavior of TiO2, NiO-TiO2, and Ni-NiO-TiO2 photocatalysts in photocatalytic hydrogen production from methanol–water solution. TiO2 and NiO-TiO2 photocatalysts with theoretical NiO loading of 0.5, 1.0, and 3.0 wt. % of NiO were prepared by the sol–gel method. The Ni-NiO-TiO2 photocatalysts were prepared by partial reduction of NiO-TiO2 in hydrogen at 450 °C. The Ni-NiO-TiO2 photocatalysts showed significantly higher hydrogen production than the NiO-TiO2 photocatalysts. The structural, textural, redox, and optical properties of all of the prepared photocatalysts were studied by using XRD, SEM, N2- adsorption, XPS, H2-TPR, and DRS. Attention is focused on the contribution of Ni loading, the surface composition (Ni2+, the lattice O2− species, and OH groups), the distribution of Ni species (dispersed NiO species, crystalline NiO phase, and the metallic Ni0 species), oxygen vacancies, TiO2 modification, the TiO2 crystallite size, and the specific surface area.
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Photocatalytic Degradation of Organic Dyes Contaminated Aqueous Solution Using Binary CdTiO2 and Ternary NiCdTiO2 Nanocomposites. Catalysts 2022. [DOI: 10.3390/catal13010044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
The synergistic effect of binary CdTiO2 and ternary NiCdTiO2 on the photocatalytic efficiency of TiO2 nanoparticles was investigated. The SEM analysis demonstrates spherical TiO2 NPs of different sizes present in agglomerated form. The structural analysis of the nanocomposites reveals a porous structure for TiO2 with well deposited Cd and Ni NPs. TEM images show NiCdTiO2 nanocomposites as highly crystalline particles having spherical and cubical geometry with an average particle size of 20 nm. The EDX and XRD analysis confirm the purity and anatase phase of TiO2, respectively. Physical features of NiCdTiO2 nanocomposite were determined via BET analysis which shows that the surface area, pore size and pore volume are 61.2 m2/g, 10.6 nm and 0.1 cm3/g, respectively. The absorbance wavelengths of the CdTiO2 and NiCdTiO2 nanocomposites have shown red shift as compared to the neat TiO2 due to coupling with Ni and Cd that results in the enhanced photocatalytic activity. The photocatalytic activity demonstrated that TiO2, CdTiO2 and NiCdTiO2 degrade methylene blue (MB) and methyl green (MG) about 76.59, 82, 86% and 63.5, 88, 97.5%, respectively, at optimum reaction conditions.
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Oxidation-induced catalytic performance of heterostructured Ni-TiO2 nanoparticles and formation of Leuco-Methylene blue. RESEARCH ON CHEMICAL INTERMEDIATES 2022. [DOI: 10.1007/s11164-022-04838-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Opra DP, Gnedenkov SV, Sinebryukhov SL, Sokolov AA, Podgorbunsky AB, Ustinov AY, Kuryaviy VG, Ziatdinov AM, Sergienko VI. Mesoporous Nanorods of Nickel- and Zinc-Containing TiO2(B) in Rechargeable Lithium and Sodium Current Sources. THEORETICAL FOUNDATIONS OF CHEMICAL ENGINEERING 2022. [DOI: 10.1134/s0040579522050116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Fabrication and characterization of Ag- and Cu-doped TiO2 nanotubes (NTs) by in situ anodization method as an efficient photocatalyst. J Solid State Electrochem 2022. [DOI: 10.1007/s10008-022-05237-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Akhtar T, Nasir H, Sitara E, Bukhari SAB, Ullah S, Iqbal RMA. Efficient photocatalytic degradation of nitrobenzene by copper-doped TiO 2: kinetic study, degradation pathway, and mechanism. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:49925-49936. [PMID: 35220541 DOI: 10.1007/s11356-022-19422-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Accepted: 02/21/2022] [Indexed: 06/14/2023]
Abstract
Cu-doped TiO2 (0.1, 0.25, and 0.5% Cu-TiO2) photocatalyst was prepared by sol-gel method and was characterized by powder XRD, FTIR, TEM, SEM, EDX, UV-vis diffuse reflectance (DRS), photoluminescence (PL), and Raman spectroscopy. The XRD spectrum shows tetragonal anatase phase. TEM analysis indicate that the nanoparticles were spherical with sizes 12-13 nm. The degradation of NB was studied, and an optimal degradation time of 180 min led to 98.6% NB abatement of NB = 0.05 mM, pH = 4, and catalyst loading = 50 mg/100 mL, under visible light. The degradation of NB follows the pseudo-first-order kinetics. The reusability studies indicated the excellent stability of 0.25% Cu-TiO2.
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Affiliation(s)
- Tehmina Akhtar
- School of Natural Sciences, National University of Sciences and Technology, H-12, Islamabad, 44000, Pakistan
| | - Habib Nasir
- School of Natural Sciences, National University of Sciences and Technology, H-12, Islamabad, 44000, Pakistan.
| | - Effat Sitara
- School of Natural Sciences, National University of Sciences and Technology, H-12, Islamabad, 44000, Pakistan
| | - Syeda Aqsa Batool Bukhari
- School of Natural Sciences, National University of Sciences and Technology, H-12, Islamabad, 44000, Pakistan
| | - Sharif Ullah
- School of Natural Sciences, National University of Sciences and Technology, H-12, Islamabad, 44000, Pakistan
| | - Rana Muhammad Arslan Iqbal
- School of Natural Sciences, National University of Sciences and Technology, H-12, Islamabad, 44000, Pakistan
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Facile Synthesis of ZSM-5/TiO2/Ni Novel Nanocomposite for the Efficient Photocatalytic Degradation of Methylene Blue Dye. J Inorg Organomet Polym Mater 2022. [DOI: 10.1007/s10904-022-02336-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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Matias ML, Pimentel A, Reis-Machado AS, Rodrigues J, Deuermeier J, Fortunato E, Martins R, Nunes D. Enhanced Fe-TiO 2 Solar Photocatalysts on Porous Platforms for Water Purification. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:1005. [PMID: 35335818 PMCID: PMC8955547 DOI: 10.3390/nano12061005] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Revised: 03/14/2022] [Accepted: 03/16/2022] [Indexed: 02/04/2023]
Abstract
In this study, polyethylene glycol-modified titanium dioxide (PEG-modified TiO2) nanopowders were prepared using a fast solvothermal method under microwave irradiation, and without any further calcination processes. These nanopowders were further impregnated on porous polymeric platforms by drop-casting. The effect of adding iron with different molar ratios (1, 2, and 5%) of iron precursor was investigated. The characterization of the produced materials was carried out by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and Raman spectroscopy. Optical characterization of all the materials was also carried out. SEM showed that pure TiO2 and Fe-TiO2 nanostructures presented similar nanosized and spherical particles, which uniformly covered the substrates. From XRD, pure TiO2 anatase was obtained for all nanopowders produced, which was further confirmed by Raman spectroscopy on the impregnated substrates. XPS and UV-VIS absorption spectroscopy emission spectra revealed that the presence of Fe ions on the Fe-TiO2 nanostructures led to the introduction of new intermediate energy levels, as well as defects that contributed to an enhancement in the photocatalytic performance. The photocatalytic results under solar radiation demonstrated increased photocatalytic activity in the presence of the 5% Fe-TiO2 nanostructures (Rhodamine B degradation of 85% after 3.5 h, compared to 74% with pure TiO2 for the same exposure time). The photodegradation rate of RhB dye with the Fe-TiO2 substrate was 1.5-times faster than pure TiO2. Reusability tests were also performed. The approach developed in this work originated novel functionalized photocatalytic platforms, which were revealed to be promising for the removal of organic dyes from wastewater.
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Affiliation(s)
- Maria Leonor Matias
- CENIMAT|i3N, Department of Materials Science, School of Science and Technology, NOVA University Lisbon and CEMOP/UNINOVA, 2829-516 Caparica, Portugal; (M.L.M.); (A.P.); (J.D.); (E.F.)
| | - Ana Pimentel
- CENIMAT|i3N, Department of Materials Science, School of Science and Technology, NOVA University Lisbon and CEMOP/UNINOVA, 2829-516 Caparica, Portugal; (M.L.M.); (A.P.); (J.D.); (E.F.)
| | - Ana S. Reis-Machado
- LAQV-REQUIMTE, Department of Chemistry, NOVA School of Science and Technology, Universidade NOVA de Lisboa, Campus de Caparica, 2829-516 Caparica, Portugal;
| | - Joana Rodrigues
- Physics Department & I3N, Aveiro University, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal;
| | - Jonas Deuermeier
- CENIMAT|i3N, Department of Materials Science, School of Science and Technology, NOVA University Lisbon and CEMOP/UNINOVA, 2829-516 Caparica, Portugal; (M.L.M.); (A.P.); (J.D.); (E.F.)
| | - Elvira Fortunato
- CENIMAT|i3N, Department of Materials Science, School of Science and Technology, NOVA University Lisbon and CEMOP/UNINOVA, 2829-516 Caparica, Portugal; (M.L.M.); (A.P.); (J.D.); (E.F.)
| | - Rodrigo Martins
- CENIMAT|i3N, Department of Materials Science, School of Science and Technology, NOVA University Lisbon and CEMOP/UNINOVA, 2829-516 Caparica, Portugal; (M.L.M.); (A.P.); (J.D.); (E.F.)
| | - Daniela Nunes
- CENIMAT|i3N, Department of Materials Science, School of Science and Technology, NOVA University Lisbon and CEMOP/UNINOVA, 2829-516 Caparica, Portugal; (M.L.M.); (A.P.); (J.D.); (E.F.)
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Momin N, Manjanna J, Aruna ST, Senthilkumar S, Reddy DS, Kumar A. Structural and electrical properties of M-doped TiO2 (M = Ni, Cu, Zn) relevant to their application as electrolytes for solid oxide fuel cells. J CHEM SCI 2022. [DOI: 10.1007/s12039-022-02026-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Floating Carbon-Doped TiO2 Photocatalyst with Metallic Underlayers Investigation for Polluted Water Treatment under Visible-Light Irradiation. Catalysts 2021. [DOI: 10.3390/catal11121454] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
In the current study, we analysed the influence of metallic underlayers on carbon-doped TiO2 films for RhB decomposition and Salmonella typhimurium inactivation under visible-light irradiation. All the experiments were divided into two parts. First, layered M/C-doped-TiO2 film structures (M = Ni, Nb, Cu) were prepared by magnetron sputtering technique on borosilicate glass substrates in the two-step deposition process. The influence of metal underlayer on the formation of the carbon-doped TiO2 films was characterised by X-ray diffractometer, scanning electron microscope, and atomic force microscope. The comparison between the visible-light assisted photocatalytic activity of M/C-doped TiO2 structures was performed by the photocatalytic bleaching tests of Rhodamine B dye aqueous solution. The best photocatalytic performance was observed for Ni/C-doped-TiO2 film combination. During the second part of the study, the Ni/C-doped-TiO2 film combination was deposited on high-density polyethylene beads which were selected as a floating substrate. The morphology and surface chemical analyses of the floating photocatalyst were performed. The viability and membrane permeability of Salmonella typhimurium were tested in cycling experiments under UV-B and visible-light irradiation. Three consecutive photocatalytic treatments of fresh bacteria suspensions with the same set of floating photocatalyst showed promising results, as after the third 1 h-long treatment bacteria viability was still reduced by 90% and 50% for UV-B and visible-light irradiation, respectively. The membrane permeability and ethidium fluorescence results suggest that Ni underlayer might have direct and indirect effect on the bacteria inactivation process. Additionally, relatively low loss of the photocatalyst efficiency suggests that floating C-doped TiO2 photocatalyst with the Ni underlayer might be seen as the possible solution for the used photocatalyst recovery issue.
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Bashir A, Rafique U, Bashir R, Jamil S, Bashir F, Sultan M, Mubeen M, Mehmood Z, Iqbal A, Akhter Z. Synthesis and comparative evaluation of optical and electrochemical properties of Ni+2 and Pr+3 ions co-doped mesoporous TiO2 nanoparticles with undoped Titania. APPLIED NANOSCIENCE 2021. [DOI: 10.1007/s13204-021-02049-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Petrović S, Stanković M, Pavlović S, Mojović Z, Radić N, Mojović M, Rožić L. Nickel oxide on mechanochemically synthesized TiO2–CeO2: photocatalytic and electrochemical activity. REACTION KINETICS MECHANISMS AND CATALYSIS 2021. [DOI: 10.1007/s11144-021-02014-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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Photocatalytic Degradation of Thiacloprid Using Tri-Doped TiO2 Photocatalysts: A Preliminary Comparative Study. Catalysts 2021. [DOI: 10.3390/catal11080927] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Different tri-doped TiO2 photocatalysts (Fe-N-P/TiO2, Fe-N-S/TiO2, Fe-Pr-N/TiO2, Pr-N-S/TiO2, and P-N-S/TiO2) were successfully prepared and tested in the photocatalytic removal of thiacloprid (THI) under UV-A, visible, and direct solar light irradiation. The physical-chemical properties of the prepared catalysts were analyzed by different characterization techniques, revealing that dopants are effectively incorporated into the anatase TiO2 lattice, resulting in a decrease of the energy band gap. The reduction of photoluminescence intensity indicates a lower combination rate and longer lifespan of photogenerated carriers of all doped samples in comparison with the un-doped TiO2. The doped photocatalysts not only significantly promote the photodegradation under UV-A light irradiation but also extend the optical response of TiO2 to visible light region, and consequently improve the visible light degradation of THI. Fe-N-P tri-doped TiO2 sample exhibits the highest THI photodegradation degree (64% under UV-A light, 29% under visible light and 73% under solar light).
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Opra DP, Gnedenkov SV, Sinebryukhov SL, Gerasimenko AV, Ziatdinov AM, Sokolov AA, Podgorbunsky AB, Ustinov AY, Kuryavyi VG, Mayorov VY, Tkachenko IA, Sergienko VI. Enhancing Lithium and Sodium Storage Properties of TiO 2(B) Nanobelts by Doping with Nickel and Zinc. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:1703. [PMID: 34203554 PMCID: PMC8306191 DOI: 10.3390/nano11071703] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Revised: 06/23/2021] [Accepted: 06/24/2021] [Indexed: 11/16/2022]
Abstract
Nickel- and zinc-doped TiO2(B) nanobelts were synthesized using a hydrothermal technique. It was found that the incorporation of 5 at.% Ni into bronze TiO2 expanded the unit cell by 4%. Furthermore, Ni dopant induced the 3d energy levels within TiO2(B) band structure and oxygen defects, narrowing the band gap from 3.28 eV (undoped) to 2.70 eV. Oppositely, Zn entered restrictedly into TiO2(B), but nonetheless, improves its electronic properties (Eg is narrowed to 3.21 eV). The conductivity of nickel- (2.24 × 10-8 S·cm-1) and zinc-containing (3.29 × 10-9 S·cm-1) TiO2(B) exceeds that of unmodified TiO2(B) (1.05 × 10-10 S·cm-1). When tested for electrochemical storage, nickel-doped mesoporous TiO2(B) nanobelts exhibited improved electrochemical performance. For lithium batteries, a reversible capacity of 173 mAh·g-1 was reached after 100 cycles at the current load of 50 mA·g-1, whereas, for unmodified and Zn-doped samples, around 140 and 151 mAh·g-1 was obtained. Moreover, Ni doping enhanced the rate capability of TiO2(B) nanobelts (104 mAh·g-1 at a current density of 1.8 A·g-1). In terms of sodium storage, nickel-doped TiO2(B) nanobelts exhibited improved cycling with a stabilized reversible capacity of 97 mAh·g-1 over 50 cycles at the current load of 35 mA·g-1.
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Affiliation(s)
- Denis P. Opra
- Institute of Chemistry, Far Eastern Branch of the Russian Academy of Sciences, 690022 Vladivostok, Russia; (S.V.G.); (S.L.S.); (A.V.G.); (A.M.Z.); (A.A.S.); (A.B.P.); (A.Y.U.); (V.G.K.); (V.Y.M.); (I.A.T.); (V.I.S.)
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Hojamberdiev M, Vargas R, Bhati VS, Torres D, Kadirova ZC, Kumar M. Unraveling the photoelectrochemical behavior of Ni-modified ZnO and TiO2 thin films fabricated by RF magnetron sputtering. J Electroanal Chem (Lausanne) 2021. [DOI: 10.1016/j.jelechem.2021.115009] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Nickel and sulfur codoped TiO2 nanoparticles for efficient visible light photocatalytic activity. J Inorg Organomet Polym Mater 2021. [DOI: 10.1007/s10904-021-01914-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
AbstractIn this work, Nickel (Ni) and sulfur (S) codoped TiO2 nanoparticles were prepared by a sol-gel technique. The as-prepared catalyst was characterized using X-ray diffraction (XRD), Fourier transforms infrared spectroscopy (FTIR), FT-Raman spectroscopy, scanning electron microscopy (SEM), energy dispersive spectrometer (EDS), transmission electron microscopy (TEM), UV-Vis diffuse reflectance spectra (DRS) for investigating crystal structure, crystal phase, particle size and bandgap energy of these samples. The photocatalytic performances of all the prepared catalysts have been investigated for the degradation of methylene blue (MB) under visible light irradiation. It was noticed that Ni-S codoped TiO2(Ni-S/TiO2) nanoparticles exhibited much higher photocatalytic activity compared with pure, Ni and S doped TiO2 due to higher visible light absorption and probable decrease in the recombination of photo-generated charges. It was decided that the great visible light absorption was created for codoped TiO2 by the formation of impurity energy states near both the edges of the collection, which works as trapping sites for both the photogenerated charges to decrease the recombination process.
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Mutuma BK, Mathebula X, Nongwe I, Mtolo BP, Matsoso BJ, Erasmus R, Tetana Z, Coville NJ. Unravelling the interfacial interaction in mesoporous SiO 2@nickel phyllosilicate/TiO 2 core-shell nanostructures for photocatalytic activity. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2020; 11:1834-1846. [PMID: 33364142 PMCID: PMC7736695 DOI: 10.3762/bjnano.11.165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Accepted: 11/16/2020] [Indexed: 06/12/2023]
Abstract
Core-shell based nanostructures are attractive candidates for photocatalysis owing to their tunable physicochemical properties, their interfacial contact effects, and their efficacy in charge-carrier separation. This study reports, for the first time, on the synthesis of mesoporous silica@nickel phyllosilicate/titania (mSiO2@NiPS/TiO2) core-shell nanostructures. The TEM results showed that the mSiO2@NiPS composite has a core-shell nanostructure with a unique flake-like shell morphology. XPS analysis revealed the successful formation of 1:1 nickel phyllosilicate on the SiO2 surface. The addition of TiO2 to the mSiO2@NiPS yielded the mSiO2@NiPS/TiO2 composite. The bandgap energy of mSiO2@NiPS and of mSiO2@NiPS/TiO2 were estimated to be 2.05 and 2.68 eV, respectively, indicating the role of titania in tuning the optoelectronic properties of the SiO2@nickel phyllosilicate. As a proof of concept, the core-shell nanostructures were used as photocatalysts for the degradation of methyl violet dye and the degradation efficiencies were found to be 72% and 99% for the mSiO2@NiPS and the mSiO2@NiPS/TiO2 nanostructures, respectively. Furthermore, a recyclability test revealed good stability and recyclability of the mSiO2@NiPS/TiO2 photocatalyst with a degradation efficacy of 93% after three cycles. The porous flake-like morphology of the nickel phyllosilicate acted as a suitable support for the TiO2 nanoparticles. Further, a coating of TiO2 on the mSiO2@NiPS surface greatly affected the surface features and optoelectronic properties of the core-shell nanostructure and yielded superior photocatalytic properties.
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Affiliation(s)
- Bridget K Mutuma
- DSI-NRF Centre of Excellence in Strong Materials and Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand, WITS 2050, Johannesburg, South Africa
| | - Xiluva Mathebula
- DSI-NRF Centre of Excellence in Strong Materials and Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand, WITS 2050, Johannesburg, South Africa
| | - Isaac Nongwe
- Department of Natural Resources and Materials, Botswana Institute for Technology Research and Innovation, 50654 Machel Drive, Gaborone, Botswana
| | - Bonakele P Mtolo
- DSI-NRF Centre of Excellence in Strong Materials and Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand, WITS 2050, Johannesburg, South Africa
| | - Boitumelo J Matsoso
- DSI-NRF Centre of Excellence in Strong Materials and Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand, WITS 2050, Johannesburg, South Africa
| | - Rudolph Erasmus
- School of Physics, University of Witwatersrand, WITS 2050, Johannesburg, South Africa
| | - Zikhona Tetana
- DSI-NRF Centre of Excellence in Strong Materials and Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand, WITS 2050, Johannesburg, South Africa
| | - Neil J Coville
- DSI-NRF Centre of Excellence in Strong Materials and Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand, WITS 2050, Johannesburg, South Africa
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Unwiset P, Chanapattharapol KC, Kidkhunthod P, Poo-arporn Y, Ohtani B. Catalytic activities of titania-supported nickel for carbon-dioxide methanation. Chem Eng Sci 2020. [DOI: 10.1016/j.ces.2020.115955] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Ibrahim HH, Mohamed AA, Ibrahim IAM. Origin of the enhanced photocatalytic activity of (Ni, Se, and B) mono- and co-doped anatase TiO 2 materials under visible light: a hybrid DFT study. RSC Adv 2020; 10:43092-43102. [PMID: 35514890 PMCID: PMC9058140 DOI: 10.1039/d0ra07781j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Accepted: 11/13/2020] [Indexed: 12/11/2022] Open
Abstract
The characteristic properties of TiO2 (anatase) make doping necessary to enhance its photocatalytic activity. Herein, a density functional theory (DFT) study using the Heyd–Scuseria–Ernzerhof (HSE) hybrid functional was performed to precisely investigate the effect of mono- and co-doping (Ni, Se and B) on the structural, electronic and optical properties of anatase TiO2. Notably, the origin of the enhanced photocatalytic activity of the modified systems was determined. The response to visible light was enhanced for all the mono- and co-doped materials except for Bint, and the highest absorption coefficient was observed for Se4+ mono-doping and Se/Bint+sub and Ni/Bsub co-doping. The decrease in bandgap is associated with a red shift in the absorption edges with the smallest bandgap calculated for Ni/Bsub (2.49 eV). Additionally, the Ni, Se4+ and Se2− mono-doped systems and Ni/Se4+ co-doped systems are proposed as promising photocatalysts for water splitting applications and further experimental validation. Moreover, the Ni/Bint+sub and Se/Bint+sub co-doped materials can also be valuable photocatalysts for other energy applications due to their enhanced visible light activity and the prolonged lifetime of their produced charge carriers. Hybrid DFT calculations demonstrate that Ni, Se4+ and Se2− mono-doped and Ni/Se4+ co-doped TiO2 are potential photocatalysts for water splitting and hydrogen production.![]()
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Affiliation(s)
- Hanan H Ibrahim
- Department of Chemistry, Faculty of Science, Helwan University 11795 Cairo Egypt
| | - Adel A Mohamed
- Department of Chemistry, Faculty of Science, Helwan University 11795 Cairo Egypt
| | - Ismail A M Ibrahim
- Department of Chemistry, Faculty of Science, Helwan University 11795 Cairo Egypt
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Mohamed HH, Al Qarni F, Alomair NA, Akhtar S. Solar Photocatalytic and Antimicrobial Activity of Porous Indium-Doped TiO2 Nanostructure. ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING 2020. [DOI: 10.1007/s13369-020-04957-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Fomekong RL, Kelm K, Saruhan B. High-Temperature Hydrogen Sensing Performance of Ni-Doped TiO 2 Prepared by Co-Precipitation Method. SENSORS (BASEL, SWITZERLAND) 2020; 20:E5992. [PMID: 33105867 PMCID: PMC7660179 DOI: 10.3390/s20215992] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Revised: 10/08/2020] [Accepted: 10/19/2020] [Indexed: 11/17/2022]
Abstract
This work deals with the substantially high-temperature hydrogen sensors required by combustion and processing technologies. It reports the synthesis of undoped and Ni-doped TiO2 (with 0, 0.5, 1 and 2 mol.% of Ni) nanoparticles by a co-precipitation method and the obtained characteristics applicable for this purpose. The effect of nickel doping on the morphological variation, as well as on the phase transition from anatase to rutile, of TiO2 was investigated by scanning electron microscopy, X-ray diffraction and Raman spectroscopy. The resistive sensors prepared with these powders were tested toward H2 at 600 °C. The results indicate that 0.5% Ni-doped TiO2 with almost equal amounts of anatase and rutile shows the best H2 sensor response (ΔR/R0 = 72%), response rate and selectivity. The significant improvement of the sensing performance of 0.5% Ni-doped TiO2 is mainly attributed to the formation of the highest number of n-n junctions present between anatase and rutile, which influence the quantity of adsorbed oxygen (i.e., the active reaction site) on the surface and the conductivity of the material.
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Affiliation(s)
- Roussin Lontio Fomekong
- Higher Teacher Training College, University of Yaounde I, Yaounde P.O. BOX 47, Cameroon;
- German Aerospace Center (DLR), Institute of Materials Research, 51147 Cologne, Germany;
| | - Klemens Kelm
- German Aerospace Center (DLR), Institute of Materials Research, 51147 Cologne, Germany;
| | - Bilge Saruhan
- German Aerospace Center (DLR), Institute of Materials Research, 51147 Cologne, Germany;
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Li K, Lu X, Zhang Y, Liu K, Huang Y, Liu H. Bi 3TaO 7/Ti 3C 2 heterojunctions for enhanced photocatalytic removal of water-borne contaminants. ENVIRONMENTAL RESEARCH 2020; 185:109409. [PMID: 32251914 DOI: 10.1016/j.envres.2020.109409] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Revised: 03/17/2020] [Accepted: 03/17/2020] [Indexed: 05/23/2023]
Abstract
Novel catalysts are of great interest for improved photocatalytic environmental remediation. Using a hydrothermal method, 0D/2D Bi3TaO7/Ti3C2 heterojunctions were designed rationally and characterized systematically as excellent photocatalysts for photocatalytic degradation. The hybrid catalyst exhibits superior performance in visible-light-driven photocatalytic degradation of methylene blue (about 99% degradation efficiency after 2 h) and excellent stability (up to 10 cycles) under visible light irradiation (300 W Xe lamp; λ > 420 nm; light intensity 150 mW cm-2). In addition, Bi3TaO7/Ti3C2 has a larger rate constant (0.032 min-1) than pristine Bi3TaO7 (0.006 min-1). Quantum yield (2.27 × 10-5 molecules/photon) and figure of merit (23.3) of the system were obtained, suggesting that our catalyst has potential for application. Both experimental and computational results indicate that synergistic effects between Bi3TaO7 and Ti3C2 improve photocatalytic performance by enhancing electron-hole pair separation, electronic transmission efficiency, and interfacial charge transfer. These findings contribute to the synthesis of efficient visible-light-driven Bi-based photocatalysts and to the understanding of photocatalytic degradation reactions.
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Affiliation(s)
- Kunshan Li
- Institute of Environmental Research at Greater Bay Area, Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou Key Laboratory for Clean Energy and Materials, Guangzhou University, Guangzhou, 510006, China
| | - Xinyu Lu
- Institute of Environmental Research at Greater Bay Area, Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou Key Laboratory for Clean Energy and Materials, Guangzhou University, Guangzhou, 510006, China
| | - You Zhang
- Institute of Environmental Research at Greater Bay Area, Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou Key Laboratory for Clean Energy and Materials, Guangzhou University, Guangzhou, 510006, China
| | - Kuiliang Liu
- Institute of Environmental Research at Greater Bay Area, Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou Key Laboratory for Clean Energy and Materials, Guangzhou University, Guangzhou, 510006, China
| | - Yongchao Huang
- Institute of Environmental Research at Greater Bay Area, Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou Key Laboratory for Clean Energy and Materials, Guangzhou University, Guangzhou, 510006, China.
| | - Hong Liu
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 401122, China.
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27
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Kaiba A, Ouerghi O, Geesi MH, Elsanousi A, Belkacem A, Dehbi O, Alharthi AI, Alotaibi MA, Riadi Y. Characterization and catalytic performance of Ni-Doped TiO2 as a potential heterogeneous nanocatalyst for the preparation of substituted pyridopyrimidines. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2019.127376] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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28
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Khandan Nasab N, Sabouri Z, Ghazal S, Darroudi M. Green-based synthesis of mixed-phase silver nanoparticles as an effective photocatalyst and investigation of their antibacterial properties. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2019.127411] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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29
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Synthesis, characterization, and application of transition metals (Ni, Zr, and Fe) doped TiO2 photoelectrodes for dye-sensitized solar cells. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2019.112177] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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30
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Yeganeh M, Mousavi M. Effects of Fe and Ni Co-Doping on the Optical Properties of TiO 2 Thin Films. INTERNATIONAL JOURNAL OF NANOSCIENCE 2020. [DOI: 10.1142/s0219581x18500461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
In this work, the effects of Fe/Ni co-doping on structural and optical properties of TiO2 thin films were investigated by the X-ray diffraction, scanning electron microscope and UV-visible spectroscopy. The optical properties of transmittance, extinction coefficient, refractive index, real and imaginary parts of dielectric constant of the thin films, prepared by spray pyrolysis, revealed that the absorption in visible region increases due to the influence of Fe/Ni co-doping. The widening of the gap energies is observed as a result of doping. The increased optical gap as a consequence of doping can be explained by decreasing the size of nanoparticles, as confirmed by SEM and increasing the formation of oxygen vacancies as a result of Ni[Formula: see text] substitution to Ti[Formula: see text] and appearance of the Burstein–Moss effect.
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Affiliation(s)
- Mahboubeh Yeganeh
- School of Natural Science, Kosar University of Bojnord, P. O. Box 9415615458, Bojnord, Iran
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31
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Raza W, Haque M, Muneer M, Bahnemann D. Synthesis of visible light driven TiO2 coated carbon nanospheres for degradation of dyes. ARAB J CHEM 2019. [DOI: 10.1016/j.arabjc.2015.09.002] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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32
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Shaban M, Ahmed AM, Shehata N, Betiha MA, Rabie AM. Ni-doped and Ni/Cr co-doped TiO 2 nanotubes for enhancement of photocatalytic degradation of methylene blue. J Colloid Interface Sci 2019; 555:31-41. [PMID: 31377646 DOI: 10.1016/j.jcis.2019.07.070] [Citation(s) in RCA: 58] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Revised: 07/20/2019] [Accepted: 07/24/2019] [Indexed: 12/07/2022]
Abstract
Ni-doped and Ni/Cr co-doped TiO2 nanotubes were successfully synthesized using a novel hydrothermal method. The surface and bulk properties of as-synthesized nanopowders were characterized using various microstructural and optical techniques. The photocatalytic ability of these nanopowders was investigated systematically for the decomposition of methylene blue dye (MB) under visible light illumination. The morphological results revealed the structural transformation of TiO2 nanotubes to nanosheets, and further to a mixture of nanosheet/nanotube on doping with Ni and co-doping of Ni/Cr, respectively. Moreover, the Ni doping causes an optical absorption edge shifts towards lower wavelengths, while doping by Ni/Cr results to an optical absorption edge shifts towards higher wavelength in comparison to TiO2-nanotubes. Also, Ni-doping and Ni/Cr co-doping strongly affects the Raman vibrational modes owing to the changes in interplanar distance, crystallite size, dislocation density, and crystal microstrains. Among the undoped, doped and co-doped TiO2 nanoparticles, the 6Ni/4Cr co-doped TiO2 exhibited a higher efficiency of 95.6% and excellent stability towards the photocatalytic degradation of MB. It is attributed to the availability of many carriers for the efficient photo-oxidation within the UV-Vis optical absorption range. Also, the photocatalytic reaction kinetics and degradation mechanism of MB were discussed.
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Affiliation(s)
- Mohamed Shaban
- Nanophotonics and Applications Lab, Physics Department, Faculty of Science, Beni-Suef University, Beni-Suef 62514, Egypt
| | - Ashour M Ahmed
- Nanophotonics and Applications Lab, Physics Department, Faculty of Science, Beni-Suef University, Beni-Suef 62514, Egypt
| | - Nora Shehata
- Nanophotonics and Applications Lab, Physics Department, Faculty of Science, Beni-Suef University, Beni-Suef 62514, Egypt
| | - Mohamed A Betiha
- Egyptian Petroleum Research Institute (EPRI), Cairo 11727, Egypt
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33
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Fu FY, Shown I, Li CS, Raghunath P, Lin TY, Billo T, Wu HL, Wu CI, Chung PW, Lin MC, Chen LC, Chen KH. KSCN-induced Interfacial Dipole in Black TiO 2 for Enhanced Photocatalytic CO 2 Reduction. ACS APPLIED MATERIALS & INTERFACES 2019; 11:25186-25194. [PMID: 31268648 DOI: 10.1021/acsami.9b06264] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Tuning the electronic band structure of black titania to improve photocatalytic performance through conventional band engineering methods has been challenging because of the defect-induced charge carrier and trapping sites. In this study, KSCN-modified hydrogenated nickel nanocluster-modified black TiO2 (SCN-H-Ni-TiO2) exhibits enhanced photocatalytic CO2 reduction due to the interfacial dipole effect. Upon combining the experimental and theoretical simulation approach, the presence of an electrostatic interfacial dipole associated with chemisorption of SCN has dramatic effects on the photocatalyst band structure in SCN-H-Ni-TiO2. An interfacial dipole possesses a more negative zeta potential shift of the isoelectric point from 5.20 to 3.20, which will accelerate the charge carrier separation and electron transfer process. Thiocyanate ion passivation on black TiO2 demonstrated an increased work function around 0.60 eV, which was induced by the interracial dipole effect. Overall, the SCN-H-Ni-TiO2 photocatalyst showed an enhanced CO2 reduction to solar fuel yield by 2.80 times higher than H-Ni-TiO2 and retained around 88% product formation yield after 40 h.
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Affiliation(s)
| | | | | | - Putikam Raghunath
- Department of Applied Chemistry , National Chiao Tung University , Hsinchu 30010 , Taiwan
| | | | - Tadesse Billo
- Department of Engineering and System Science , National Tsing Hua University , Hsinchu 30013 , Taiwan
| | | | | | | | - Ming-Chang Lin
- Department of Applied Chemistry , National Chiao Tung University , Hsinchu 30010 , Taiwan
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Enhanced Photocatalytic Degradation of Organic Dyes via Defect-Rich TiO 2 Prepared by Dielectric Barrier Discharge Plasma. NANOMATERIALS 2019; 9:nano9050720. [PMID: 31075936 PMCID: PMC6567862 DOI: 10.3390/nano9050720] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Revised: 05/05/2019] [Accepted: 05/07/2019] [Indexed: 11/17/2022]
Abstract
The dye wastewater produced in the printing and dyeing industry causes serious harm to the natural environment. TiO2 usually shows photocatalytic degradation of dye under the irradiation ultravilet light rather than visible light. In this work, a large number of oxygen vacancies and Ti3+ defects were generated on the surface of the TiO2 nanoparticles via Ar plasma. Compared with pristine TiO2 nanoparticles, the as-obtained Ar plasma-treated TiO2 (Ar-TiO2) nanoparticles make the energy band gap reduce from 3.21 eV to 3.17 eV and exhibit enhanced photocatalytic degradation of organic dyes. The Ar-TiO2 obtained exhibited excellent degradation properties of methyl orange (MO); the degradation rate under sunlight irradiation was 99.6% in 30 min, and the photocatalytic performance was about twice that of the original TiO2 nanoparticles (49%). The degradation rate under visible light (λ > 400 nm) irradiation was 89% in 150 min, and the photocatalytic performance of the Ar-TiO2 was approaching ~4 times higher than that of the original TiO2 nanoparticles (23%). Ar-TiO2 also showed good degradation performance in degrading rhodamine B (Rho B) and methylene blue (MB). We believe that this plasma strategy provides a new method for improving the photocatalytic activity of other metal oxides.
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Akshay VR, Arun B, Mandal G, Vasundhara M. Structural, optical and magnetic behavior of sol–gel derived Ni-doped dilute magnetic semiconductor TiO2 nanocrystals for advanced functional applications. Phys Chem Chem Phys 2019; 21:2519-2532. [DOI: 10.1039/c8cp06875e] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Defect engineering of Ni-doped TiO2 could tailor the magnetic properties through BMP interactions, which is advantageous for spintronics applications.
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Affiliation(s)
- V. R. Akshay
- Materials Science and Technology Division
- CSIR-National Institute for Interdisciplinary Science and Technology
- Trivandrum – 695 019
- India
- Academy of Scientific and Innovative Research (AcSIR)
| | - B. Arun
- Materials Science and Technology Division
- CSIR-National Institute for Interdisciplinary Science and Technology
- Trivandrum – 695 019
- India
- Academy of Scientific and Innovative Research (AcSIR)
| | - Guruprasad Mandal
- Centre for Rural and Cryogenic Technologies
- Jadavpur University
- Kolkata-700032
- India
| | - M. Vasundhara
- Materials Science and Technology Division
- CSIR-National Institute for Interdisciplinary Science and Technology
- Trivandrum – 695 019
- India
- Academy of Scientific and Innovative Research (AcSIR)
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Ganesh I. Surface, structural, energy band-gap, and photocatalytic features of an emulsion-derived B-doped TiO 2 nano-powder. MOLECULAR CATALYSIS 2018. [DOI: 10.1016/j.mcat.2017.10.024] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Sousa KAP, Lima FMR, Monteiro TO, Silva SM, Goulart MOF, Damos FS, Luz RDCS. Amperometric Photosensor Based on Acridine Orange/TiO2 for Chlorogenic Acid Determination in Food Samples. FOOD ANAL METHOD 2018. [DOI: 10.1007/s12161-018-1261-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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38
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Han E, Vijayarangamuthu K, Youn JS, Park YK, Jung SC, Jeon KJ. Degussa P25 TiO 2 modified with H 2 O 2 under microwave treatment to enhance photocatalytic properties. Catal Today 2018. [DOI: 10.1016/j.cattod.2017.08.057] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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39
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Structural, optical, and magnetic study of Ni-doped TiO2 nanoparticles synthesized by sol–gel method. INTERNATIONAL NANO LETTERS 2018. [DOI: 10.1007/s40089-018-0225-7] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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40
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Oliveira Monteiro T, Costa dos Santos C, Santos Damos F, de Cássia Silva Luz R. Light-emitting Diode-assisted Determination of 2-(1,1-Dimethylethyl)-1,4-Benzenediol in Cosmetic Samples Exploiting TiO2
Sensitized with Lithium 7,7′,8,8′-Tetracyanoquinodimethanide. ELECTROANAL 2018. [DOI: 10.1002/elan.201700745] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Thatyara Oliveira Monteiro
- Laboratory of Sensors, Devices and Analytical Methods, Department of Chemistry; Federal University of Maranhão; 65080-805 São Luís - MA Brazil
| | | | - Flávio Santos Damos
- Laboratory of Sensors, Devices and Analytical Methods, Department of Chemistry; Federal University of Maranhão; 65080-805 São Luís - MA Brazil
| | - Rita de Cássia Silva Luz
- Laboratory of Sensors, Devices and Analytical Methods, Department of Chemistry; Federal University of Maranhão; 65080-805 São Luís - MA Brazil
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A comparative run for visible-light-driven photocatalytic activity of anionic and cationic S-doped TiO2 photocatalysts: A case study of possible sulfur doping through chemical protocol. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.molcata.2016.05.003] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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42
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Investigation of the influence of vanadium, iron and nickel dopants on the morphology, and crystal structure and photocatalytic properties of titanium dioxide based nanopowders. J Colloid Interface Sci 2016; 474:179-89. [PMID: 27124812 DOI: 10.1016/j.jcis.2016.04.024] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2016] [Revised: 04/18/2016] [Accepted: 04/19/2016] [Indexed: 11/22/2022]
Abstract
Photoactive V, Fe and Ni doped TiO2 (M-TiO2) nanopowders were synthesized by a modified two-step sol-gel process in the absence of additives. Titanium oxychloride, which is a rarely-used TiO2 precursor was used to yield M-TiO2 photocatalysts with preferential photochemical performance in the presence of natural solar irradiation. The obtained samples were calcined at different calcination temperatures ranging from 450 to 800°C to evaluate the influence of the sintering on the physicochemical properties. The properties of the obtained samples were examined by XRF, XRD, Raman spectroscopy, UV-visible DRS, XPS, nitrogen gas physisorption studies, SEM-EDAX and HRTEM analyses. Structural characterization of the samples revealed the incorporation of these transition metal element into TiO2. It was also depicted that the morphology, crystal structure, optical and photochemical properties of the obtained samples were largely dependent on the calcination temperature and the type of dopant used during the preparation process. The photochemical performance of the samples was investigated in the photodegradation of methylene blue in the presence of natural sunlight. The experimental results indicated that the VT600 sample possessed the highest activity due to its superior properties. This study provides a systematic preparation and selection of the precursor, dopant and calcination temperature that are suitable for the formation of TiO2-based heterogeneous photocatalysts with appealing morphology, crystal structure, optical and photochemical properties for myriad of applications.
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Wu P, Wang G, Chen R, Guo Y, Ma X, Jiang D. Enhanced visible light absorption and photocatalytic activity of [KNbO3]1−x[BaNi0.5Nb0.5O3−δ]x synthesized by sol–gel based Pechini method. RSC Adv 2016. [DOI: 10.1039/c6ra15288k] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
[KNbO3]1−x[BaNi0.5Nb0.5O3−δ]x were synthesized by Pechini sol–gel method at low temperature. Visible light photocatalytic performance of this material was evaluated.
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Affiliation(s)
- Ping Wu
- School of Physics and Material Science
- East China Normal University
- Shanghai 200241
- People's Republic of China
| | - Guoming Wang
- School of Physics and Material Science
- East China Normal University
- Shanghai 200241
- People's Republic of China
| | - Ruizhi Chen
- School of Physics and Material Science
- East China Normal University
- Shanghai 200241
- People's Republic of China
| | - Yixin Guo
- School of Physics and Material Science
- East China Normal University
- Shanghai 200241
- People's Republic of China
| | - Xueming Ma
- School of Physics and Material Science
- East China Normal University
- Shanghai 200241
- People's Republic of China
| | - Dongmei Jiang
- School of Physics and Material Science
- East China Normal University
- Shanghai 200241
- People's Republic of China
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44
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Bakar SA, Ribeiro C. Rapid and morphology controlled synthesis of anionic S-doped TiO2 photocatalysts for the visible-light-driven photodegradation of organic pollutants. RSC Adv 2016. [DOI: 10.1039/c6ra03819k] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
In recent years, growing concerned has been raised to the global problem of the drainage of organic pollutants into water steams.
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Affiliation(s)
- Shahzad Abu Bakar
- Department of Chemistry
- Federal University of São Carlos
- São Carlos
- Brazil
- Embrapa CNPDIA
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45
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Banerjee AM, Pai MR, Arya A, Bharadwaj SR. Photocatalytic H2 generation over In2TiO5, Ni substituted In2TiO5 and NiTiO3 – a combined theoretical and experimental study. RSC Adv 2015. [DOI: 10.1039/c5ra10531e] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Role of Ni substitution in modifying the crystal structure, optical absorption properties and electronic properties of indium titanate, In2(1−x)Ni2xTiO5−δ (0.0 ≤ 2x ≤ 0.4) and its consequent effect on the photocatalytic properties for H2 generation.
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Affiliation(s)
- A. M. Banerjee
- 3-189 H Modular Labs
- Fuel Cell Materials and Catalysis Section
- Chemistry Division
- Bhabha Atomic Research Centre
- Mumbai–400085
| | - M. R. Pai
- 3-189 H Modular Labs
- Fuel Cell Materials and Catalysis Section
- Chemistry Division
- Bhabha Atomic Research Centre
- Mumbai–400085
| | - A. Arya
- Material Science Division
- Bhabha Atomic Research Centre
- Mumbai–400085
- India
| | - S. R. Bharadwaj
- 3-189 H Modular Labs
- Fuel Cell Materials and Catalysis Section
- Chemistry Division
- Bhabha Atomic Research Centre
- Mumbai–400085
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46
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Bellam JB, Ruiz-Preciado MA, Edely M, Szade J, Jouanneaux A, Kassiba AH. Visible-light photocatalytic activity of nitrogen-doped NiTiO3 thin films prepared by a co-sputtering process. RSC Adv 2015. [DOI: 10.1039/c4ra12516a] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
NiTiO3 thin films grown using a co-sputtering process exhibited well defined structural, morphological and optical characteristics, which showed enhanced visible light photocatalytic activity.
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Affiliation(s)
- Jagadeesh Babu Bellam
- Institute of Molecules and Materials
- UMR-CNRS 6283
- University of Maine
- F-72085 Le Mans
- France
| | | | - Mathieu Edely
- Institute of Molecules and Materials
- UMR-CNRS 6283
- University of Maine
- F-72085 Le Mans
- France
| | - Jacek Szade
- A. Chełkowski Institute of Physics and Silesian Centre of Education and Interdisciplinary Research – University of Silesia
- 40-007 Katowice
- Poland
| | - Alain Jouanneaux
- Institute of Molecules and Materials
- UMR-CNRS 6283
- University of Maine
- F-72085 Le Mans
- France
| | - Abdel Hadi Kassiba
- Institute of Molecules and Materials
- UMR-CNRS 6283
- University of Maine
- F-72085 Le Mans
- France
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47
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Saien J, Azizi A, Soleymani AR. Optimized photocatalytic conversion of Ni(II) ions with very low titania nanoparticles at different temperatures; kinetics and energy consumption. Sep Purif Technol 2014. [DOI: 10.1016/j.seppur.2014.07.027] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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48
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Comparative optical and electrochemical studies of nanostructured NiTiO3 and NiTiO3-TiO2 prepared by a low temperature modified Sol-Gel route. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2014.03.166] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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49
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Effect of Calcination Temperature on Synthesis of N-Fe-TiO 2 for Photocatalytic Degradation of Methylene Blue under Visible Light. ACTA ACUST UNITED AC 2014. [DOI: 10.4028/www.scientific.net/amm.575.55] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Effect of calcination temperature on the synthesis of N, Fe codoped TiO2 for the photodegradation of methylene blue under ordinary visible lamps was investigated. The photocatalyst were prepared using solgel method where titanium isopropoxide was used as precursor of titania. The calcination temperatures were varied from 450 to 600°C. The prepared photocatalysts were characterized by using XRD, FE-SEM and FTIR to determine their physical properties. The results from XRD proved that photocatalysts calcined at 600°C possessed perfect properties in phase and crystal size. FE-SEM image analysis revealed the formation of the fine spherical particles and the FTIR analysis verified the presence of dopants at various calcination temperatures. The effectivity of photocatalysts was tested by performing a standard batch photocatalytic degradation experiment with methylene blue as a model pollutant under ordinary visible light. The result showed that N and Fe codoped photocatalyst calcined at 600°C (1.0 % N, Fe-TiO2-600) yielded a maximum of 80.50% methylene blue degraded within five hours of irradiation time.
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50
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Li Z, Ding D, Liu Q, Ning C, Wang X. Ni-doped TiO2 nanotubes for wide-range hydrogen sensing. NANOSCALE RESEARCH LETTERS 2014; 9:118. [PMID: 24624981 PMCID: PMC3984682 DOI: 10.1186/1556-276x-9-118] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/22/2013] [Accepted: 03/04/2014] [Indexed: 06/03/2023]
Abstract
Doping of titania nanotubes is one of the efficient way to obtain improved physical and chemical properties. Through electrochemical anodization and annealing treatment, Ni-doped TiO2 nanotube arrays were fabricated and their hydrogen sensing performance was investigated. The nanotube sensor demonstrated a good sensitivity for wide-range detection of both dilute and high-concentration hydrogen atmospheres ranging from 50 ppm to 2% H2. A temperature-dependent sensing from 25°C to 200°C was also found. Based on the experimental measurements and first-principles calculations, the electronic structure and hydrogen sensing properties of the Ni-doped TiO2 with an anatase structure were also investigated. It reveals that Ni substitution of the Ti sites could induce significant inversion of the conductivity type and effective reduction of the bandgap of anatase oxide. The calculations also reveal that the resistance change for Ni-doped anatase TiO2 with/without hydrogen absorption was closely related to the bandgap especially the Ni-induced impurity level.
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Affiliation(s)
- Zhaohui Li
- Institute of Microelectronic Materials and Technology, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Dongyan Ding
- Institute of Microelectronic Materials and Technology, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Qiang Liu
- Institute of Microelectronic Materials and Technology, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Congqin Ning
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
| | - Xuewu Wang
- School of Information Science and Engineering, East China University of Science and Technology, Shanghai 200237, China
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