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Farooqi MA, Farooqi HMU, Bhatti T, Siddiqui GU, Kausar F, Kang CU. Functionalization of niobium nitrogen-doped titanium dioxide (TiO 2) nanoparticles with ethanolic extracts of Mentha arvensis. DISCOVER NANO 2024; 19:67. [PMID: 38619645 PMCID: PMC11018591 DOI: 10.1186/s11671-024-04011-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2023] [Accepted: 04/09/2024] [Indexed: 04/16/2024]
Abstract
Titanium dioxide (TiO2) nanoparticles have gained significant attention due to their wide-ranging applications. This research explores an approach to functionalize Niobium Nitrogen Titanium Dioxide nanoparticles (Nb-N-TiO2 NPs) with Mentha arvensis ethanolic leaf extracts. This functionalization allows doped NPs to interact with the bioactive compounds in extracts, synergizing their antioxidant activity. While previous studies have investigated the antioxidant properties of TiO2 NPs synthesized using ethanolic extracts of Mentha arvensis, limited research has focused on evaluating the antioxidant potential of doped nanoparticles functionalized with plant extracts. The characterization analyses are employed by Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and Ultraviolet-visible (UV-Vis) spectroscopy to evaluate these functionalized doped nanoparticles thoroughly. Subsequently, the antioxidant capabilities through the 2,2-diphenyl-1-picrylhydrazyl (DPPH) and ferric-reducing antioxidant power (FRAP) assays have been assessed. Within functionalized Nb-N-TiO2, the FTIR has a distinctive peak at 2350, 2010, 1312, 1212, and 1010 cm-1 with decreased transmittance associated with vibrations linked to the Nb-N bond. SEM revealed a triangular aggregation pattern, 500 nm to 2 µm of functionalized Nb-N-TiO2 NPs. Functionalized doped Nb-N-TiO2 NPs at 500 µg mL-1 exhibited particularly robust antioxidant activity, achieving an impressive 79% efficacy at DPPH assessment; meanwhile, ferric reduction efficiency of functionalized doped Nb-N-TiO2 showed maximum 72.16%. In conclusion, doped Nb-N-TiO2 NPs exhibit significantly enhanced antioxidant properties when functionalized with Mentha arvensis ethanolic extract compared to pure Nb-N-TiO2 manifested that doped Nb-N-TiO2 have broad promising endeavors for various biomedicine applications.
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Affiliation(s)
- Muhammad Awais Farooqi
- Department of Mechatronics Engineering, Jeju National University, Jeju-si, Republic of Korea
| | | | - Theophilus Bhatti
- Interdisciplinary Department of Advanced Convergence Technology and Science, College of Pharmacy, Jeju National University, Jeju-si, Republic of Korea
| | - Ghayas Uddin Siddiqui
- Department of Chemical and Biological Engineering, Jeju National University, Jeju-si, Republic of Korea
| | - Farzana Kausar
- Department of Plant Sciences, Quaid-i-Azam University, Islamabad, Pakistan
| | - Chul Ung Kang
- Department of Mechatronics Engineering, Jeju National University, Jeju-si, Republic of Korea.
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Ostovar A, Larimi A, Jiang Z, Lotfi M, Ghotbi C, Khorasheh F. Enhanced visible-light photocatalytic oxidative desulfurization of model fuel over Pt-decorated carbon-doped TiO 2 nanoparticles. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:18188-18199. [PMID: 36952170 DOI: 10.1007/s11356-023-26597-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Accepted: 03/17/2023] [Indexed: 06/18/2023]
Abstract
Modification of photocatalysts to improve their adsorption and photocatalytic activity in the oxidative desulfurization of liquid fuels has been reported by many investigators. In this study, Pt-decorated carbon-doped TiO2 nanoparticles were synthesized by hydrothermal and photo-deposition techniques and were subsequently used in photocatalytic oxidative desulfurization of dibenzothiophene (DBT) in n-heptane as a simulated liquid fuel with methanol as the extracting solvent. Carbon-doped TiO2 was first synthesized by a simple self-doping method. Pt was then loaded by a photo-deposition technique. The synthesized photocatalysts (labeled as YPt-CT where Y is percent Pt loading) were characterized by of X-ray diffraction (XRD), photoluminescence (PL), field emission scanning electron microscopy (FESEM), N2-physisorption, UV-Vis diffusive reflectance spectra (UV-Vis DRS), transmission electron microscopy (TEM), Fourier transform infrared spectra (FTIR), and nitrogen sorption measurements. The removal efficiency of DBT was 98% in the presence of 2 g/l of 0.5Pt-CT catalyst under visible-light irradiation (λ > 400 nm), ambient pressure, and reaction temperature of 40°C.
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Affiliation(s)
- Abdollah Ostovar
- Department of Chemical and Petroleum Engineering, Sharif University of Technology, Tehran, Iran
| | - Afsanehsadat Larimi
- Department of Chemical and Process Engineering, Niroo Research Institute, Tehran, Iran.
| | - Zhi Jiang
- Research Center for Combustion and Environmental Technology, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Marzieh Lotfi
- Department of Chemical Engineering, Jundi-Shapur University of Technology, Dezful, Iran
| | - Cyrus Ghotbi
- Department of Chemical and Petroleum Engineering, Sharif University of Technology, Tehran, Iran
| | - Farhad Khorasheh
- Department of Chemical and Petroleum Engineering, Sharif University of Technology, Tehran, Iran
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Patel J, Singh KR, Singh AK, Singh J, Singh AK. Multifunctional Cu:ZnS quantum dots for degradation of Amoxicillin and Dye Sulphon Fast Black-F and efficient determination of urea for assessing environmental aspects. ENVIRONMENTAL RESEARCH 2023; 235:116674. [PMID: 37459950 DOI: 10.1016/j.envres.2023.116674] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Revised: 07/11/2023] [Accepted: 07/13/2023] [Indexed: 07/24/2023]
Abstract
This work is particularly aimed at the preparation of ZnS and Cu doped ZnS (Cu:ZnS) QDs by facile and easy technique, chemical precipitation method for the degradation of water pollutants and a simple scheme was proposed to prepare the urea-sensing system. The morphological and optical properties of the synthesized QDs was studied using high resolution transmission and scanning electron microscopes, X-ray diffraction, energy dispersive X-ray analysis, fluorescence and ultraviolet-visible spectroscopy, differential thermal and thermogravimetric analyses, Brunauer-Emmett-Teller analysis. The photocatalytic performance was systematically assessed by the photodegradation of an important pharmaceutical water pollutant, Amoxicillin (AMX) and a dye Fast Sulphon Black F (SFBF) in aqueous medium under UV light irradiation. Also, a very sensitive system was prepared by depositing the dots over an indium-tin-oxide (ITO) glass substrate for the sensing of biologically active molecule urea as it is an important monitor of public health in water and soil productivity. The results illustrated excellent photocatalytic efficiency (86.46% for AMX and 99.41% for SFBF) with stability up to four cycles of degradation reaction. The optimal photocatalyst dosage for achieving maximum removal of AMX was found to be 70 mg at a pH of 9.5, with a treatment time of 40 min. Similarly, for SFBF, the optimal photocatalyst dosage was determined to be 60 mg at pH 9, with a treatment time of 60 min. Further, the electrochemical analysis was done by fabricating Urease enzyme (UR)/Cu:ZnS QDs/ITO bioelectrode and then the fabricated bioelectrode, was utilized to determine the different concentrations of urea by cyclic voltammetry. Thus, the obtained limit of detection and sensitivity of the fabricated biosensing device for urea detection was obtained to be 0.0092 μM and 12 μA μM-1cm-2, respectively; under the optimized experimental conditions. Hence, it is anticipated that Cu:ZnS QDs can also successfully be applied as a promising material for fabrication of novel bioelectrode for urea determination and the biosensing platform is desirable and viable.
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Affiliation(s)
- Jyoti Patel
- Department of Chemistry, Govt. V. Y. T. PG. Autonomous College, Durg, Chhattisgarh, 491001, India
| | - Kshitij Rb Singh
- Department of Chemistry, Govt. V. Y. T. PG. Autonomous College, Durg, Chhattisgarh, 491001, India; Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi, Uttar Pradesh, 221005, India
| | - Akhilesh Kumar Singh
- School of Material Science and Technology, Indian Institute of Technology, Banaras Hindu University, Varanasi, Uttar Pradesh, 221005, India
| | - Jay Singh
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi, Uttar Pradesh, 221005, India
| | - Ajaya K Singh
- Department of Chemistry, Govt. V. Y. T. PG. Autonomous College, Durg, Chhattisgarh, 491001, India; School of Chemistry & Physics, University of KwaZulu-Natal, Durban 4000, South Africa.
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Zhang H, Zhu Z, Yang M, Li Y, Lin X, Li M, Tang S, Teng Y, Kuang DB. Constructing the Sulfur-Doped CdO@In 2O 3 Nanofibers Ternary Heterojunction for Efficient Photocatalytic Hydrogen Production. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:401. [PMID: 36770362 PMCID: PMC9920990 DOI: 10.3390/nano13030401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/17/2022] [Revised: 01/10/2023] [Accepted: 01/12/2023] [Indexed: 06/18/2023]
Abstract
An S-doped CdO@In2O3 nanofiber was successfully designed by in-situ electrospinning along and subsequent calcination treatment. Under artificial sunlight illumination, the S/CdO@In2O3-25 displayed a superior photocatalytic hydrogen evolution rate of 4564.58 μmol·g-1·h-1, with approximately 22.0 and 1261.0-fold of those shown by the S/CdO and S/In2O3 samples, respectively. The experimental and theoretical analyses illustrate that the unique one-dimensional (1D) nanofiber morphology and rich oxygen vacancies optimized the electronic structure of the nanofibers and adsorption/desorption behaviors of reaction intermediates, contributing to the realization of the remarkable solar-to-H2 conversion efficiencies. Moreover, the staggered band structure and intimate contact heterointerfaces facilitate the formation of a type-II double charge-transfer pathway, promoting the spatial separation of photoexcited charge carriers. These results could inform the design of other advanced catalyst materials for photocatalytic reactions.
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Affiliation(s)
- Haiyan Zhang
- National Experimental Teaching Demonstration Center for Chemistry, College of Chemistry and Chemical Engineering, Jishou University, Jishou 416000, China
| | - Zi Zhu
- National Experimental Teaching Demonstration Center for Chemistry, College of Chemistry and Chemical Engineering, Jishou University, Jishou 416000, China
| | - Min Yang
- National Experimental Teaching Demonstration Center for Chemistry, College of Chemistry and Chemical Engineering, Jishou University, Jishou 416000, China
| | - Youji Li
- National Experimental Teaching Demonstration Center for Chemistry, College of Chemistry and Chemical Engineering, Jishou University, Jishou 416000, China
| | - Xiao Lin
- National Experimental Teaching Demonstration Center for Chemistry, College of Chemistry and Chemical Engineering, Jishou University, Jishou 416000, China
| | - Ming Li
- National Experimental Teaching Demonstration Center for Chemistry, College of Chemistry and Chemical Engineering, Jishou University, Jishou 416000, China
| | - Senpei Tang
- National Experimental Teaching Demonstration Center for Chemistry, College of Chemistry and Chemical Engineering, Jishou University, Jishou 416000, China
| | - Yuan Teng
- National Experimental Teaching Demonstration Center for Chemistry, College of Chemistry and Chemical Engineering, Jishou University, Jishou 416000, China
| | - Dai-Bin Kuang
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, Lehn Institute of Functional Materials, School of Chemistry, Sun Yat-sen University, Guangzhou 510006, China
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Ali S, Abdul Nasir J, Nasir Dara R, Rehman Z. Modification strategies of metal oxide photocatalysts for clean energy and environmental applications: A review. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.110011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Raeisi I, Derakhshi P, Azar PA, Tehrani MS. Novel photocatalyst system to deep desulfurization of petroleum model and gas condensate by Box–Behnken design. CAN J CHEM 2022. [DOI: 10.1139/cjc-2021-0342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
In this research, cobalt (Co)/molybdenum (Mo) and nickel (Ni) doped with titanium dioxide (TiO2) were loaded onto multi-walled carbon nanotubes (MWCNTs). Then, the magnetization catalyst, iron oxide (Fe3O4), was loaded on them, which was used for the deep desulfurization of dibenzothiophene (DBT). These catalysts were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, energy-dispersive X-ray spectroscopy, differential reflectance spectroscopy, and Brunauer–Emmett–Teller, Barrett–Joyner–Halenda, and vibrating sample magnetometer techniques. The photocatalytic activity of these catalysts was experienced under visible light using DBT. The response surface methodology based on the Box–Behnken design was used to evaluate parameters, including catalyst dosage (g), time (min), and concentration of DBT (mg L−1). The highest degradation efficiency under optimal conditions for CoMoNi/TiO2/MWCNTs/Fe3O4 catalysts with a catalyst dosage of 0.3 g, a time of 180 min, and a concentration of 50 mg L−1 was 99.99%. Optimum conditions were studied for desulfurization of the gas condensate. The highest desulfurization efficiency (90.33%) was obtained by the CoMoNi/TiO2/MWCNTs/Fe3O4 catalyst.
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Affiliation(s)
- Ilnaz Raeisi
- Faculty of Chemistry, Islamic Azad University, North Tehran Branch, Tehran, Iran
| | - Pirouz Derakhshi
- Faculty of Chemistry, Islamic Azad University, North Tehran Branch, Tehran, Iran
| | - Parviz Aberoomand Azar
- Department of Chemistry, Islamic Azad University Science and Research Branch, Tehran, Iran
| | - Mohammad Saber Tehrani
- Department of Chemistry, Islamic Azad University Science and Research Branch, Tehran, Iran
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Synthesis and Application of Innovative and Environmentally Friendly Photocatalysts: A Review. Catalysts 2022. [DOI: 10.3390/catal12101074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022] Open
Abstract
Modern society faces two major challenges: removing pollutants from water and producing energy from renewable sources. To do this, science proposes innovative, low-cost, and environmentally friendly methods. The heterogeneous photocatalysis process fits perfectly in this scenario. In fact, with photocatalysis, it is possible both to mineralize contaminants that are not easily biodegradable and to produce hydrogen from the water splitting reaction or from the conversion of organic substances present in water. However, the main challenge in the field of heterogeneous photocatalysis is to produce low-cost and efficient photocatalysts active under visible light or sunlight. The objective of this review is to compare the new proposals for the synthesis of innovative photocatalysts that reflect the requirements of green chemistry, applied both in the removal of organic contaminants and in hydrogen production. From this comparison, we want to bring out the strengths and weaknesses of the proposals in the literature, but above all, new ideas to improve the efficiency of heterogeneous photocatalysis guaranteeing the principles of environmental and economic sustainability.
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Wahyuni ET, Mochammad RS, Mahira NS, Lestari ND, Syoufian A, Nasir TA. Enhancement of TiO2 activity under visible light by doping S element from sulfur core for Pb(II) photo-oxidation. REACTION KINETICS MECHANISMS AND CATALYSIS 2022. [DOI: 10.1007/s11144-022-02268-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
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9
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Akram R, Almohaimeed ZM, Bashir A, Ikram M, Qadir KW, Zafar Q. Synthesis and characterization of pristine and strontium-doped zinc oxide nanoparticles for methyl green photo-degradation application. NANOTECHNOLOGY 2022; 33:295702. [PMID: 35504008 DOI: 10.1088/1361-6528/ac6760] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Accepted: 04/14/2022] [Indexed: 06/14/2023]
Abstract
Herein we describe an effective route for the degradation of methyl green (MG) dye under visible light illumination by pristine and strontium (Sr)-doped zinc oxide (ZnO) photocatalysts (synthesized by the simple chemical precipitation method). The x-ray diffraction structural analysis has confirmed that both photocatalysts exhibit the hexagonal wurtzite structure; without any additional phase formation in Sr-doped ZnO, in particular. The optical properties of the synthesized photocatalysts have been investigated using UV-vis absorption spectroscopy in the wavelength range of 250-800 nm. Through Tauc's plot, the slight decrease from 3.3 to 3.2 eV in band gap energy has been elucidated (in the case of Sr-doped ZnO), which has been further confirmed by the quenching in the intensity of Photoluminescence (PL) emission spectrum. This may be due to sub-band level formation between valence and conduction band, caused by the impregnation of Sr2+ions into ZnO host. The morphological study has also been performed using Field Emission Scanning Electron Microscope, which indicates nanoparticles (NPs) based surface texture for both photocatalysts. During the photocatalytic activity study, after 30 min irradiation of visible light, ∼65.7% and ∼84.8% photocatalytic degradation of MG dye has been achieved for pristine and Sr-doped (2 wt%) ZnO photocatalysts, respectively. The rate of photocatalytic reaction (K) has been observed to be ∼0.06399 min-1for Sr-doped (2 wt%), whereas nearly half magnitude ∼0.03403 min-1has been observed for pristine ZnO, respectively. The significantly improved photodegradation activity may be ascribed to the relatively broader optical absorption capability, surface defects and the enhanced charge separation efficiency of the Sr-doped ZnO photocatalyst.
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Affiliation(s)
- Rizwan Akram
- Department of Electrical Engineering, College of Engineering, Qassim University, PO Box 6677-Buraydah, 51452, Saudi Arabia
| | - Ziyad M Almohaimeed
- Department of Electrical Engineering, College of Engineering, Qassim University, PO Box 6677-Buraydah, 51452, Saudi Arabia
| | - Adeela Bashir
- Department of Physics, University of Management and Technology, 54000-Lahore, Pakistan
| | - Muhammad Ikram
- Solar Cell Applications Research Lab, Department of Physics, Government College University, 54000-Lahore, Pakistan
| | - Karwan Wasman Qadir
- Computation Nanotechnology Research Lab (CNRL), Department of Physics, College of Education, Salahaddin University-Erbil, 44002-Erbil, Kurdistan Region, Iraq
| | - Qayyum Zafar
- Department of Physics, University of Management and Technology, 54000-Lahore, Pakistan
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Removal of the Hazardous Congo Red Dye through Degradation under Visible Light Photocatalyzed by C,N Co-Doped TiO2 Prepared from Chicken Egg White. ScientificWorldJournal 2022; 2022:2613841. [PMID: 35463828 PMCID: PMC9033386 DOI: 10.1155/2022/2613841] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2021] [Revised: 02/20/2022] [Accepted: 03/23/2022] [Indexed: 11/18/2022] Open
Abstract
The C,N co-doped TiO2 photocatalyst was prepared by interacting the chicken egg white having various weights (1, 2, and 4 g) with 1 g of TiO2 in an autoclave through the hydrothermal process at 150°C. The C,N co-doped TiO2 photocatalysts were characterized using Fourier transform infrared (FTIR), X-ray diffraction (XRD), specular reflectance UV/visible (SRUV/Vis), and transmission electron microscope (TEM) instruments. The photocatalytic activity of the co-doped TiO2 was evaluated by monitoring the photo-decolorization of Congo red dye under visible light through a batch experiment. The characterization results assigned that the C and N atoms from the chicken egg white have been successfully co-doped into TiO2 through interstitial and substitutional combination, which could notably narrow their band gap energy entering into the visible region. In line with the gap narrowing, the co-doping C,N into TiO2 could remarkably improve the photocatalytic activity under visible light in the dye photo-decolorization. The enhancement of the photocatalyst activity of TiO2-C,N was controlled by the weight of the egg white introduced, and 2 g of the egg white resulted in the highest activity. Further, the best dye photo-decolorization, which was about 98%, of 10 mg/L Congo red dye in 100 mL of the solution under visible irradiation could be reached by applying TiO2-C,N prepared from 2 g of the egg white, within 45 min, at pH 7, and 50 mg of the photocatalyst mass.
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11
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Qiu F, Pan S, Zhu X, Zhang T. Synthesis of Ternary Heterostructure Semiconductor Photocatalyst and Its Photocatalytic Performance Under Visible Light Irradiation. J Inorg Organomet Polym Mater 2022. [DOI: 10.1007/s10904-021-02177-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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12
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Hassankhani‐Majd Z, Anbia M. Comparative Study of Synthesis Parameters of Nanoporous Titania Particles to Improve Structural Properties and Photocatalytic Activity. ChemistrySelect 2021. [DOI: 10.1002/slct.202103550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Zahra Hassankhani‐Majd
- Research Laboratory of Nanoporous Materials Faculty of Chemistry Iran University of Science and Technology Farjam Street, Narmak, P.O. Box 16846–13114 Tehran Iran
| | - Mansoor Anbia
- Research Laboratory of Nanoporous Materials Faculty of Chemistry Iran University of Science and Technology Farjam Street, Narmak, P.O. Box 16846–13114 Tehran Iran
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Yang X, Qu J, Wang L, Luo J. In-plasma-catalysis for NO x degradation by Ti 3+ self-doped TiO 2-x /γ-Al 2O 3 catalyst and nonthermal plasma. RSC Adv 2021; 11:24144-24155. [PMID: 35479043 PMCID: PMC9036666 DOI: 10.1039/d1ra02847b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Accepted: 06/30/2021] [Indexed: 01/14/2023] Open
Abstract
In an attempt to realize the efficient treatment of NOx, a mixed catalyst of Ti3+ self-doped TiO2−x and γ-Al2O3 was constructed by reducing commercial TiO2. The degradation effect on NOx was evaluated by introducing the mixed catalyst into a coaxial dual-dielectric barrier reactor. It was found that the synthesized TiO2−x could achieve considerable degradation effects (84.84%, SIE = 401.27 J L−1) in a plasma catalytic system under oxygen-rich conditions, which were better than those of TiO2 (73.99%) or a single plasma degradation process (26.00%). The presence of Ti3+ and oxygen vacancies in TiO2−x resulted in a relatively narrow band gap, which contributed to catalyzing deeply the oxidation of NOx to NO2− and NO3− during the plasma-induced “pseudo-photocatalysis” process. Meanwhile, the TiO2−x showed an improved discharge current and promoted discharge efficiency, explaining its significant activation effect in the reaction. Reduced TiO2−x could achieve an impressive degradation effect in a long-time plasma-catalysis process, and still maintained its intrinsic crystal structure and morphology. This work provides a facile synthesis procedure for preparing Ti3+ self-doped TiO2−x with practical and scalable production potential; moreover, the novel combination with plasma also provides new insights into the low-temperature degradation of NOx. TiO2−x has a smaller forbidden band width, more abundant Ti3+ and oxygen vacancies, so as to obtain a better and more stable degradation effect of NOx in plasma-catalysis process.![]()
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Affiliation(s)
- Xingdong Yang
- Department of Chemical Engineering, Sichuan University Chengdu Sichuan 610065 P.R. China
| | - Jiyan Qu
- Department of Chemical Engineering, Sichuan University Chengdu Sichuan 610065 P.R. China
| | - Linxi Wang
- Department of Chemical Engineering, Sichuan University Chengdu Sichuan 610065 P.R. China
| | - Jianhong Luo
- Department of Chemical Engineering, Sichuan University Chengdu Sichuan 610065 P.R. China
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BERKTAŞ A, KARTAL ÖE. Decolorization of Reactive Black 5 Using N-Doped TiO2. GAZI UNIVERSITY JOURNAL OF SCIENCE 2021. [DOI: 10.35378/gujs.828761] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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15
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Abstract
This article presents an overview of the reports on the doping of TiO2 with carbon, nitrogen, and sulfur, including single, co-, and tri-doping. A comparison of the properties of the photocatalysts synthesized from various precursors of TiO2 and C, N, or S dopants is summarized. Selected methods of synthesis of the non-metal doped TiO2 are also described. Furthermore, the influence of the preparation conditions on the doping mode (interstitial or substitutional) with reference to various types of the modified TiO2 is summarized. The mechanisms of photocatalysis for the different modes of the non-metal doping are also discussed. Moreover, selected applications of the non-metal doped TiO2 photocatalysts are shown, including the removal of organic compounds from water/wastewater, air purification, production of hydrogen, lithium storage, inactivation of bacteria, or carbon dioxide reduction.
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Ke T, Shen S, Rajavel K, Yang K, Lin D. In situ growth of TiO 2 nanoparticles on nitrogen-doped Ti 3C 2 with isopropyl amine toward enhanced photocatalytic activity. JOURNAL OF HAZARDOUS MATERIALS 2021; 402:124066. [PMID: 33254836 DOI: 10.1016/j.jhazmat.2020.124066] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Revised: 09/14/2020] [Accepted: 09/20/2020] [Indexed: 06/12/2023]
Abstract
Construction of heterojunction and nitrogen doping is an effective approach for synthesizing photocatalysts with high quantum yield and efficient electron-hole separation. 2D MXene Ti3C2 has been considered a good carbonaceous nanomaterial for designing heterojunction, while the original surface groups and stacked structure limit the electron-hole separation. Herein, a hybrid of nitrogen-doped Ti3C2 nanosheets and TiO2 nanoparticles (NPs) composed of TiO2 NPs in situ growing on isopropyl amine (iPA) modified Ti3C2 (iN-Ti3C2) was developed for the first time. The novel iN-Ti3C2/TiO2 hybrid exhibited an excellent ultraviolet-light photodegradation of methylene blue (MB), with a degradation rate (0.02642 min-1) significantly higher than that of pure TiO2 NPs, bulk-Ti3C2/TiO2, dimethyl sulfoxide modified Ti3C2/TiO2 hybrid, and hydrazine monohydrate modified Ti3C2/TiO2 hybrid. The formation of heterojunction between iN-Ti3C2 and TiO2 and its role in the photocatalysis were systematically analyzed using various characterization techniques and density functional theory calculation. The iPA modification exfoliated Ti3C2 and doped N on Ti3C2 nanosheets; the in situ grown TiO2 NPs formed efficient heterojunctions with the nanosheets; the N-doping facilitated electron migration in Ti3C2 and inhibited the recombination of photogenerated electron-hole pairs; •OH dominated the photodegradation of MB. This work provides a new approach of constructing efficient photocatalysts for the treatment of organics-polluted water.
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Affiliation(s)
- Tao Ke
- Department of Environmental Science, Zhejiang University, Hangzhou 310058, China
| | - Shuyi Shen
- Department of Environmental Science, Zhejiang University, Hangzhou 310058, China
| | | | - Kun Yang
- Department of Environmental Science, Zhejiang University, Hangzhou 310058, China; Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Zhejiang University, Hangzhou 310058, China
| | - Daohui Lin
- Department of Environmental Science, Zhejiang University, Hangzhou 310058, China; Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Zhejiang University, Hangzhou 310058, China.
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Gopinath KP, Madhav NV, Krishnan A, Malolan R, Rangarajan G. Present applications of titanium dioxide for the photocatalytic removal of pollutants from water: A review. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2020; 270:110906. [PMID: 32721341 DOI: 10.1016/j.jenvman.2020.110906] [Citation(s) in RCA: 112] [Impact Index Per Article: 28.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2020] [Revised: 04/26/2020] [Accepted: 06/01/2020] [Indexed: 05/20/2023]
Abstract
The evolution of modern technology and industrial processes has been accompanied by an increase in the utilization of chemicals to derive new products. Water bodies are frequently contaminated by the presence of conventional pollutants such as dyes and heavy metals, as well as microorganisms that are responsible for various diseases. A sharp rise has also been observed in the presence of new compounds heretofore excluded from the design and evaluation of wastewater treatment processes, categorized as "emerging pollutants". While some are harmless, certain emerging pollutants possess the ability to cause debilitating effects on a wide spectrum of living organisms. Photocatalytic degradation has emerged as an increasingly popular solution to the problem of water pollution due to its effectiveness and versatility. The primary objective of this study is to thoroughly scrutinize recent applications of titanium dioxide and its modified forms as photocatalytic materials in the removal and control of several classes of water pollutants as reported in literature. Different structural modifications are used to enhance the performance of the photocatalyst such as doping and formation of composites. The principles of these modifications have been scrutinized and evaluated in this review in order to present their advantages and drawbacks. The mechanisms involved in the removal of different pollutants through photocatalysis performed by TiO2 have been highlighted. The factors affecting the mechanism of photocatalysis and those affecting the performance of different TiO2-based photocatalysts have also been thoroughly discussed, thereby presenting a comprehensive view of all aspects involved in the application of TiO2 to remediate and control water pollution.
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Affiliation(s)
| | - Nagarajan Vikas Madhav
- Department of Chemical Engineering, SSN College of Engineering, Kalavakkam, Chennai, 603110, Tamil Nadu, India
| | - Abhishek Krishnan
- Department of Chemical Engineering, SSN College of Engineering, Kalavakkam, Chennai, 603110, Tamil Nadu, India
| | - Rajagopal Malolan
- Department of Chemical Engineering, SSN College of Engineering, Kalavakkam, Chennai, 603110, Tamil Nadu, India
| | - Goutham Rangarajan
- Department of Chemical Engineering & Applied Chemistry, University of Toronto, 200 College Street, Ontario, M5S 3E5, Canada
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18
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Wang W, Lin F, Yan B, Cheng Z, Chen G, Kuang M, Yang C, Hou L. The role of seashell wastes in TiO 2/Seashell composites: Photocatalytic degradation of methylene blue dye under sunlight. ENVIRONMENTAL RESEARCH 2020; 188:109831. [PMID: 32798949 DOI: 10.1016/j.envres.2020.109831] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Revised: 06/11/2020] [Accepted: 06/12/2020] [Indexed: 06/11/2023]
Abstract
This paper proposes a sustainable and facile approach for the synthesis of photocatalysts in which shell waste is used as support material. The synthesized photocatalysts exhibited a significant performance in the mineralization of organic substances under solar irradiation or artificial lighting. Calcined abalone shell with a TiO2 loading of 23.4% led to a significant improvement in optical absorption: the degradation efficiencies of methylene blue (MB) after 140 min under UV light, vis light, UV-vis light, and natural sunlight were 93%, 96%, 100%, and 100%, respectively. Notably, the byproducts obtained after the degradation by commercial P25 TiO2 disappeared with the utilization of shell waste as support material. The Na, Sr, S present in the calcined abalone shell were doped into the substitutional sites of TiO2 and were indispensable to achieve the desired band-gap narrowing and photocatalytic performance; moreover, the Ti and Zn oxides in the calcined abalone shell acted as semiconductors and improved the charge separation efficiency of TiO2. Above all, this paper describes a green synthesis based on the use of waste seashell. This material acts as an excellent photocatalyst support for environmental pollution treatments, leading to the 'control of waste by waste' and opening up new possibilities for shell waste reutilization and sustainable chemistry.
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Affiliation(s)
- Wenjun Wang
- School of Environmental Science and Engineering, Tianjin University, Tianjin, 300072, PR China
| | - Fawei Lin
- School of Environmental Science and Engineering, Tianjin University, Tianjin, 300072, PR China.
| | - Beibei Yan
- School of Environmental Science and Engineering, Tianjin University, Tianjin, 300072, PR China
| | - Zhanjun Cheng
- School of Environmental Science and Engineering, Tianjin University, Tianjin, 300072, PR China
| | - Guanyi Chen
- School of Science, Tibet University, Lhasa, 850012, China
| | - Meng Kuang
- State Key Laboratory of Green Building Materials, China Building Materials Academy, Beijing, 100024, PR China
| | - Chao Yang
- School of Environmental Science and Engineering, Tianjin University, Tianjin, 300072, PR China
| | - Lian Hou
- School of Environmental Science and Engineering, Tianjin University, Tianjin, 300072, PR China; Xi'an High-Tech Institute, Xi'an, 710025, China.
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19
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Zhang Y, Huang Y, Srot V, van Aken PA, Maier J, Yu Y. Enhanced Pseudo-Capacitive Contributions to High-Performance Sodium Storage in TiO 2/C Nanofibers via Double Effects of Sulfur Modification. NANO-MICRO LETTERS 2020; 12:165. [PMID: 34138160 PMCID: PMC7770798 DOI: 10.1007/s40820-020-00506-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Accepted: 07/22/2020] [Indexed: 05/28/2023]
Abstract
Pseudo-capacitive mechanisms can provide higher energy densities than electrical double-layer capacitors while being faster than bulk storage mechanisms. Usually, they suffer from low intrinsic electronic and ion conductivities of the active materials. Here, taking advantage of the combination of TiS2 decoration, sulfur doping, and a nanometer-sized structure, as-spun TiO2/C nanofiber composites are developed that enable rapid transport of sodium ions and electrons, and exhibit enhanced pseudo-capacitively dominated capacities. At a scan rate of 0.5 mV s-1, a high pseudo-capacitive contribution (76% of the total storage) is obtained for the S-doped TiS2/TiO2/C electrode (termed as TiS2/S-TiO2/C). Such enhanced pseudo-capacitive activity allows rapid chemical kinetics and significantly improves the high-rate sodium storage performance of TiO2. The TiS2/S-TiO2/C composite electrode delivers a high capacity of 114 mAh g-1 at a current density of 5000 mA g-1. The capacity maintains at high level (161 mAh g-1) even after 1500 cycles and is still characterized by 58 mAh g-1 at the extreme condition of 10,000 mA g-1 after 10,000 cycles.
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Affiliation(s)
- Yan Zhang
- Max Planck Institute for Solid State Research, Stuttgart, 70569, Germany
| | - Yuanye Huang
- Max Planck Institute for Solid State Research, Stuttgart, 70569, Germany
| | - Vesna Srot
- Max Planck Institute for Solid State Research, Stuttgart, 70569, Germany
| | - Peter A van Aken
- Max Planck Institute for Solid State Research, Stuttgart, 70569, Germany
| | - Joachim Maier
- Max Planck Institute for Solid State Research, Stuttgart, 70569, Germany
| | - Yan Yu
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Materials Science and Engineering, Key Laboratory of Materials for Energy Conversion, Chinese Academy of Sciences (CAS), University of Science and Technology of China, Hefei, 230026, Anhui, People's Republic of China.
- Dalian National Laboratory for Clean Energy (DNL), Chinese Academy of Sciences (CAS), Dalian, 116023, Liaoning, People's Republic of China.
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20
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Effect of the Modification of TiO2 with Thiourea on its Photocatalytic Activity in Doxycycline Degradation. THEOR EXP CHEM+ 2020. [DOI: 10.1007/s11237-020-09650-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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21
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Bao W, Wang N, He Z. Synthesis of reduced C,N-TiO 2 for catalytic oxidation of HCHO indoors. J COORD CHEM 2020. [DOI: 10.1080/00958972.2020.1798416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Wen Bao
- Green Catalysis Center and College of Chemistry, Zhengzhou University, Zhengzhou, China
| | - Nan Wang
- Green Catalysis Center and College of Chemistry, Zhengzhou University, Zhengzhou, China
| | - Zhanhang He
- Green Catalysis Center and College of Chemistry, Zhengzhou University, Zhengzhou, China
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22
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Tóth ZR, Hernadi K, Baia L, Kovács G, Pap Z. Controlled formation of Ag-AgxO nanoparticles on the surface of commercial TiO2 based composites for enhanced photocatalytic degradation of oxalic acid and phenol. Catal Today 2020. [DOI: 10.1016/j.cattod.2020.06.051] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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23
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24
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Abd El-Nasser S, Kim S, Yoon H, Toth R, Pal K, Bechelany M. Sodium-assisted TiO2 nanotube arrays of novel electrodes for photochemical sensing platform. ORGANIC ELECTRONICS 2020; 76:105443. [DOI: 10.1016/j.orgel.2019.105443] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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25
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Versatile titanium dioxide nanoparticles prepared by surface-grown polymerization of polyethylenimine for photodegradation and catalytic C C bond forming reactions. MOLECULAR CATALYSIS 2019. [DOI: 10.1016/j.mcat.2019.110501] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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26
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Xie X, Chen C, Wang X, Li J, Naraginti S. Efficient detoxification of triclosan by a S-Ag/TiO 2@g-C 3N 4 hybrid photocatalyst: process optimization and bio-toxicity assessment. RSC Adv 2019; 9:20439-20449. [PMID: 35514706 DOI: 10.1039/c9ra03279grsc.li/rsc-advances] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Accepted: 06/24/2019] [Indexed: 05/22/2023] Open
Abstract
Owing to their persistency and toxicity, development of an effective strategy to eliminate antibiotic residues from the aquatic system has become a major environmental concern. Doping TiO2 with hetero atoms and forming a hybrid structure with g-C3N4 could serve as an efficient visible light active photocatalytic candidate. In this study, a novel S-Ag/TiO2@g-C3N4 hybrid catalyst was prepared for visible light degradation and detoxification of triclosan (TS) antibiotic. The effect of various operational parameters towards the photocatalytic degradation was systematically evaluated through response surface methodology (RSM) based on central composite design (CCD). The highest TS degradation (92.3%) was observed under optimal conditions (TS concentration = 10 mg L-1, pH = 7.8, and catalyst weight = 0.20 g L-1) after 60 min. Efficient charge separation resulted from the doped nanoparticles (silver and sulphur), the existing integrated electric field of the heterojunction and the overlying light response of hybridized TiO2 and g-C3N4, thus the S-Ag/TiO2@g-C3N4 composite showed impressively higher activity. The main degradation products of TS were identified by LC/ESI-MS analysis. In addition, the toxicity of the degradation products was investigated through an Escherichia coli (E. coli) colony forming unit assay and the results revealed that under optimal conditions a significant reduction in biotoxicity was noticed.
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Affiliation(s)
- Xiangfeng Xie
- Jiangsu Academy of Environmental Industry and Technology Corp. Nanjing 210036 China
- School of Energy and Environment, Key Laboratory of Environmental Medicine Engineering of the Ministry of Education, Southeast University Nanjing 210096 China
| | - Chen Chen
- Jiangsu Academy of Environmental Industry and Technology Corp. Nanjing 210036 China
| | - Xiaoxiang Wang
- Jiangsu Academy of Environmental Industry and Technology Corp. Nanjing 210036 China
- Ministry of Education Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, College of Environment, Hohai University Nanjing 210098 China
| | - Jie Li
- Jiangsu Academy of Environmental Industry and Technology Corp. Nanjing 210036 China
- Ministry of Education Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, College of Environment, Hohai University Nanjing 210098 China
| | - Saraschandra Naraginti
- Ministry of Education Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, College of Environment, Hohai University Nanjing 210098 China
- Biofuels Institute, School of the Environment, Jiangsu University 301 Xuefu Road Zhenjiang 212013 China
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27
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UV and Visible Light-Driven Production of Hydroxyl Radicals by Reduced Forms of N, F, and P Codoped Titanium Dioxide. Molecules 2019; 24:molecules24112147. [PMID: 31174409 PMCID: PMC6600679 DOI: 10.3390/molecules24112147] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Revised: 05/31/2019] [Accepted: 06/03/2019] [Indexed: 11/21/2022] Open
Abstract
The photocatalytic activities of reduced titanium dioxide (TiO2) materials have been investigated by measuring their ability to produce hydroxyl radicals under UV and visible light irradiation. Degussa P25 TiO2 was doped with nitrogen (N), fluorine (F), and/or phosphorus (P) and then subjected to surface modification employing a thermo-physicochemical process in the presence of reducing agent sodium borohydride (NaBH4). The reduced TiO2 materials were characterized by a number of X-ray, spectroscopic and imaging methods. Surface doping of TiO2 was employed to modulate the band gap energies into the visible wavelength region for better overlap with the solar spectrum. Hydroxyl radical generation, central to TiO2 photocatalytic water purification applications, was quantitated using coumarin as a trap under UV and visible light irradiation of the reduced TiO2 materials. At 350 nm irradiation, the yield of hydroxyl radicals generated by the reduced forms of TiO2 was nearly 90% of hydroxyl radicals generated by the Degussa P25 TiO2. Hydroxyl radical generation by these reduced forms of TiO2 was also observed under visible light irradiation (419 and 450 nm). These results demonstrated that simple surface modification of doped TiO2 can lead to visible light activity, which is important for more economical solar-driven applications of TiO2 photocatalysis.
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28
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Polat K, Yurdakoç M. Removal of Malachite Green from Waste Waters by Bentonite Based Photocatalyst Technology. JOURNAL OF THE TURKISH CHEMICAL SOCIETY, SECTION A: CHEMISTRY 2019. [DOI: 10.18596/jotcsa.526822] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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29
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Chen X, Kuo DH, Saragih AD, Wu ZY, Abdullah H, Lin J. The effect of the Cu+/Cu2+ ratio on the redox reactions by nanoflower CuNiOS catalysts. Chem Eng Sci 2019. [DOI: 10.1016/j.ces.2018.02.016] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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30
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Xie X, Chen C, Wang X, Li J, Naraginti S. Efficient detoxification of triclosan by a S–Ag/TiO2@g-C3N4hybrid photocatalyst: process optimization and bio-toxicity assessment. RSC Adv 2019; 9:20439-20449. [PMID: 35514706 PMCID: PMC9065728 DOI: 10.1039/c9ra03279g] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Accepted: 06/24/2019] [Indexed: 11/21/2022] Open
Abstract
Owing to their persistency and toxicity, development of an effective strategy to eliminate antibiotic residues from the aquatic system has become a major environmental concern. Doping TiO2 with hetero atoms and forming a hybrid structure with g-C3N4 could serve as an efficient visible light active photocatalytic candidate. In this study, a novel S–Ag/TiO2@g-C3N4 hybrid catalyst was prepared for visible light degradation and detoxification of triclosan (TS) antibiotic. The effect of various operational parameters towards the photocatalytic degradation was systematically evaluated through response surface methodology (RSM) based on central composite design (CCD). The highest TS degradation (92.3%) was observed under optimal conditions (TS concentration = 10 mg L−1, pH = 7.8, and catalyst weight = 0.20 g L−1) after 60 min. Efficient charge separation resulted from the doped nanoparticles (silver and sulphur), the existing integrated electric field of the heterojunction and the overlying light response of hybridized TiO2 and g-C3N4, thus the S–Ag/TiO2@g-C3N4 composite showed impressively higher activity. The main degradation products of TS were identified by LC/ESI-MS analysis. In addition, the toxicity of the degradation products was investigated through an Escherichia coli (E. coli) colony forming unit assay and the results revealed that under optimal conditions a significant reduction in biotoxicity was noticed. Owing to their persistency and toxicity, development of an effective strategy to eliminate antibiotic residues from the aquatic system has become a major environmental concern.![]()
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Affiliation(s)
- Xiangfeng Xie
- Jiangsu Academy of Environmental Industry and Technology Corp
- Nanjing 210036
- China
- School of Energy and Environment
- Key Laboratory of Environmental Medicine Engineering of the Ministry of Education
| | - Chen Chen
- Jiangsu Academy of Environmental Industry and Technology Corp
- Nanjing 210036
- China
| | - Xiaoxiang Wang
- Jiangsu Academy of Environmental Industry and Technology Corp
- Nanjing 210036
- China
- Ministry of Education Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes
- College of Environment
| | - Jie Li
- Jiangsu Academy of Environmental Industry and Technology Corp
- Nanjing 210036
- China
- Ministry of Education Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes
- College of Environment
| | - Saraschandra Naraginti
- Ministry of Education Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes
- College of Environment
- Hohai University
- Nanjing 210098
- China
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31
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Effect of dopant (Co, Ni) concentration and hydroxyapatite compositing on photocatalytic activity of titania towards dye degradation. J Photochem Photobiol A Chem 2018. [DOI: 10.1016/j.jphotochem.2017.12.027] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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32
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Cravanzola S, Sarro M, Cesano F, Calza P, Scarano D. Few-Layer MoS₂ Nanodomains Decorating TiO₂ Nanoparticles: A Case Study for the Photodegradation of Carbamazepine. NANOMATERIALS 2018; 8:nano8040207. [PMID: 29596373 PMCID: PMC5923537 DOI: 10.3390/nano8040207] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Revised: 03/24/2018] [Accepted: 03/27/2018] [Indexed: 01/17/2023]
Abstract
S-doped TiO2 and hybrid MoS2/TiO2 systems have been synthesized, via the sulfidation with H2S of the bare TiO2 and of MoOx supported on TiO2 systems, with the aim of enhancing the photocatalytic properties of TiO2 for the degradation of carbamazepine, an anticonvulsant drug, whose residues and metabolites are usually inefficiently removed in wastewater treatment plants. The focus of this study is to find a relationship between the morphology/structure/surface properties and photoactivity. The full characterization of samples reveals the strong effects of the H2S action on the properties of TiO2, with the formation of defects at the surface, as shown by transmission electron microscopy (TEM) and infrared spectroscopy (IR), while also the optical properties are strongly affected by the sulfidation treatment, with changes in the electronic states of TiO2. Meanwhile, the formation of small and thin few-layer MoS2 domains, decorating the TiO2 surface, is evidenced by both high-resolution transmission electron microscopy (HRTEM) and UV-Vis/Raman spectroscopies, while Fourier-transform infrared (FTIR) spectra give insights into the nature of Ti and Mo surface sites. The most interesting findings of our research are the enhanced photoactivity of the MoS2/TiO2 hybrid photocatalyst toward the carbamazepine mineralization. Surprisingly, the formation of hazardous compounds (i.e., acridine derivatives), usually obtained from carbamazepine, is precluded when treated with MoS2/TiO2 systems.
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Affiliation(s)
- Sara Cravanzola
- Department of Chemistry, NIS (Nanostructured Interfaces and Surfaces) Inter-Departmental Centre and INSTM Centro di Riferimento, University of Torino, Via P. Giuria, 7, 10125 Torino, Italy.
| | - Marco Sarro
- Department of Chemistry, NIS (Nanostructured Interfaces and Surfaces) Inter-Departmental Centre and INSTM Centro di Riferimento, University of Torino, Via P. Giuria, 7, 10125 Torino, Italy.
| | - Federico Cesano
- Department of Chemistry, NIS (Nanostructured Interfaces and Surfaces) Inter-Departmental Centre and INSTM Centro di Riferimento, University of Torino, Via P. Giuria, 7, 10125 Torino, Italy.
| | - Paola Calza
- Department of Chemistry, NIS (Nanostructured Interfaces and Surfaces) Inter-Departmental Centre and INSTM Centro di Riferimento, University of Torino, Via P. Giuria, 7, 10125 Torino, Italy.
| | - Domenica Scarano
- Department of Chemistry, NIS (Nanostructured Interfaces and Surfaces) Inter-Departmental Centre and INSTM Centro di Riferimento, University of Torino, Via P. Giuria, 7, 10125 Torino, Italy.
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33
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Wang Q, Bi W, Miao J, Lu M, Zhang D, Chen Y, Yang H. Preparation and electrochemical properties of graphene-supported Si-TiO2
nanospheres as anode material for Li-ion batteries. SURF INTERFACE ANAL 2018. [DOI: 10.1002/sia.6404] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Qiufen Wang
- Henan Key Laboratory of Coal Green Conversion, College of Chemistry and Chemical Engineering; Henan Polytechnic University; Jiaozuo China
| | - Wenyan Bi
- Henan Key Laboratory of Coal Green Conversion, College of Chemistry and Chemical Engineering; Henan Polytechnic University; Jiaozuo China
| | - Juan Miao
- Henan Key Laboratory of Coal Green Conversion, College of Chemistry and Chemical Engineering; Henan Polytechnic University; Jiaozuo China
| | - Mengwei Lu
- Henan Key Laboratory of Coal Green Conversion, College of Chemistry and Chemical Engineering; Henan Polytechnic University; Jiaozuo China
| | - Dafeng Zhang
- Henan Key Laboratory of Coal Green Conversion, College of Chemistry and Chemical Engineering; Henan Polytechnic University; Jiaozuo China
| | - Yumei Chen
- Henan Key Laboratory of Coal Green Conversion, College of Chemistry and Chemical Engineering; Henan Polytechnic University; Jiaozuo China
| | - Hong Yang
- Henan Key Laboratory of Coal Green Conversion, College of Chemistry and Chemical Engineering; Henan Polytechnic University; Jiaozuo China
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34
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Wang Y, Ye S, Zhu L, Chen F, Shi S, Wang M, Ge J, Zhu Q, Hu J, Wang Y. Effects of heat treatment on the microstructure and properties of TiO2 based film by plasma electrolytic oxidation. MONATSHEFTE FUR CHEMIE 2017. [DOI: 10.1007/s00706-017-1941-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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35
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Energy-absorption-based explanation of the TiO 2 /C photocatalytic activity enhancement mechanism. J Catal 2017. [DOI: 10.1016/j.jcat.2016.12.022] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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36
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Chen X, Kuo DH, Lu D. Visible light response and superior dispersed S-doped TiO 2 nanoparticles synthesized via ionic liquid. ADV POWDER TECHNOL 2017. [DOI: 10.1016/j.apt.2017.02.007] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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37
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Abstract
V2O5powders modified with different theoretical silver contents (1, 5, 10, 15, and 20 wt% as Ag2O) were obtained with acicular morphologies observed by scanning electron microscopy (SEM). Shcherbinaite crystalline phase is transformed into the Ag0.33V2O5crystalline one with the incorporation and increase in silver content as was suggested by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) analysis. With further increase in silver contents the Ag2O phase appears. Catalysts were active in photocatalytic degradation of malachite green dye under simulated solar light, which is one of the most remarkable facts of this work. It was found that V2O5-20Ag was the most active catalytic formulation and its activity was attributed to the mixture of coupled semiconductors that promotes the slight decrease in the rate of the electron-hole pair recombination.
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38
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Zhou Q, Xing A, Zhao D, Zhao K. Tetrabromobisphenol A photoelectrocatalytic degradation using reduced graphene oxide and cerium dioxide comodified TiO 2 nanotube arrays as electrode under visible light. CHEMOSPHERE 2016; 165:268-276. [PMID: 27657819 DOI: 10.1016/j.chemosphere.2016.08.143] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2016] [Revised: 08/17/2016] [Accepted: 08/31/2016] [Indexed: 06/06/2023]
Abstract
Tetrabromobisphenol A, one of the most important brominated retardants, is an typical persistent organic pollutant and it is of great value to develop rapid and effective degradation method. Present study established a photoelectrodegradation method with CeO2 and reduced graphene oxide co-modified TiO2 nanotube arrays (RGO-CeO2-TiO2 NAs), which were successfully synthesized and characterized with scanning electron microscopy (SEM) and Energy Dispersive X Ray Spectrometry (EDX). The SEM Images revealed that the nanotubes had a diameter of about 100 nm and an obvious layer of CeO2 and RGO on the surface of TiO2 nanotube arrays. The EDX data exhibited the presence of Ce element. The results demonstrated that TBBPA was degraded at a high degradation rate constant of 0.0191 min-1, and photogenerated holes played a major role in the degradation reaction. Significant decrease of degradation efficiency was achieved with the presence of EDTA-2Na(hole scavenger), yet while the existence of t-BuOH(OH scavenger) resulted in less inhibition on the degradation. Besides, RGO-CeO2-TiO2 NAs exhibited good stability with rarely decline of degradation efficiency for ten reused runs. All these indicated that RGO-CeO2-TiO2 NAs were a good catalyst with extraordinary catalytic activity and stability for PEC degradation, and would have great potential in the control and removal of pollutants.
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Affiliation(s)
- Qingxiang Zhou
- College of Geosciences, China University of Petroleum Beijing, Beijing 102249, China.
| | - An Xing
- College of Geosciences, China University of Petroleum Beijing, Beijing 102249, China
| | - Danchen Zhao
- College of Geosciences, China University of Petroleum Beijing, Beijing 102249, China
| | - Kuifu Zhao
- College of Geosciences, China University of Petroleum Beijing, Beijing 102249, China
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39
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Zhang X, Li D, Wan J, Yu X. Preparation of Ti mesh supported N–S–C-tridoped TiO2 nanosheets to achieve high utilization of optical energy for photocatalytic degradation of norfloxacin. RSC Adv 2016. [DOI: 10.1039/c5ra27639j] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
The Ti mesh supported N–S–C-tridoped TiO2 nanosheet (N–S–C/TiO2/TMs) catalysts were successfully fabricated by the one-step in situ hydrothermal synthesis method, and then used for photocatalytic degradation of norfloxacin.
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Affiliation(s)
- Xiaoyun Zhang
- Department of Environmental Science and Engineering
- Heilongjiang University
- Harbin 150080
- PR China
| | - Dong Li
- Department of Environmental Science and Engineering
- Heilongjiang University
- Harbin 150080
- PR China
| | - Jiafeng Wan
- Department of Environmental Science and Engineering
- Heilongjiang University
- Harbin 150080
- PR China
- Key Laboratory of Chemical Engineering Process & Technology for High-efficiency Conversion
| | - Xiujuan Yu
- Department of Environmental Science and Engineering
- Heilongjiang University
- Harbin 150080
- PR China
- Key Laboratory of Chemical Engineering Process & Technology for High-efficiency Conversion
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Wang W, Liu Y, Qu J, Chen Y, Shao Z. Nitrogen-doped TiO2 microspheres with hierarchical micro/nanostructures and rich dual-phase junctions for enhanced photocatalytic activity. RSC Adv 2016. [DOI: 10.1039/c6ra02966c] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
We successfully synthesized microspherical nitrogen-doped TiO2 with hierarchical nano/microstructures, rich anatase TiO2–TiO2(B) phase junctions and a reduced band gap for the photo-degradation of dyes with improved photocatalytic activity.
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Affiliation(s)
- Wei Wang
- Department of Chemical Engineering
- Curtin University
- Perth
- Australia
| | - Yu Liu
- Department of Chemical Engineering
- Curtin University
- Perth
- Australia
| | - Jifa Qu
- State Key Laboratory of Materials-Oriented Chemical Engineering
- Nanjing Tech University
- Nanjing
- China
| | - Yubo Chen
- State Key Laboratory of Materials-Oriented Chemical Engineering
- Nanjing Tech University
- Nanjing
- China
| | - Zongping Shao
- Department of Chemical Engineering
- Curtin University
- Perth
- Australia
- State Key Laboratory of Materials-Oriented Chemical Engineering
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