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Nirbhaya V, Chandra R, Kumar S. Nanoengineered phosphorus doped graphitic carbon nitride based ultrasensitive biosensing platform for Swine flu detection. Colloids Surf B Biointerfaces 2023; 230:113504. [PMID: 37597493 DOI: 10.1016/j.colsurfb.2023.113504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Revised: 08/02/2023] [Accepted: 08/05/2023] [Indexed: 08/21/2023]
Abstract
In the present study, we developed an amino-polyindole modified phosphorus doped graphitic carbon nitride nanomaterial (APIN/P-g-C3N4) based immunosensing biochip for Serum amyloid A (SAA) biomarker towards early diagnosis of Swine flu. The P-g-C3N4 was synthesis via polycondensation and functionalized with APIN. Further, the biochip was fabricated by modifying the working area of SPE with APIN/P-g-C3N4 using drop cast method, APIN introduced the larger loading of -NH2 group moieties onto P-g-C3N4 matrix and benefitted to reinforced the biomolecules via covalent linkages. The monoclonal anti-SAA was conjugated onto APIN/P-g-C3N4/SPE using EDC-NHS chemistry and BSA was added for non-specific site blocking. The structural, chemical, composition and morphological characteristics of the synthesized, functionalized nanomaterial and fabricated biochips were investigated by XRD, XPS, FT-IR spectroscopy, SEM, FE-SEM and TEM techniques. Further, the electrochemical characterization and response studies of fabricated biochip were analyzed using the CV and DPV techniques. Based on the analytical performance of the proposed immunosensing biochip i.e. BSA/anti-SAA/APIN/P-g-C3N4/SPE, it is capable to detect SAA protein with ultra sensitivity of 79.5 μA log (mL ng-1) cm-2, ultralow limit of detection of 5 ng mL-1 and wider linear detection range of 5 ng mL-1-500 μg mL-1 with quick response time of 10 min. Moreover, the fabricated immunosensing biochips was used to analyse SAA protein in spiked serum samples and the achieved results demonstrated the good agreement with the electrochemical response observed in standard SAA protein samples in analytical solution. The proposed biochip can provide insights for developing a wide range of clinical screening tools for detecting various contagious diseases.
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Affiliation(s)
- Vishakha Nirbhaya
- Department of Chemistry, University of Delhi, Delhi 110007, India; Department of Applied Science, Meerut Institute of Engineering and Technology, Meerut 250005, India
| | - Ramesh Chandra
- Department of Chemistry, University of Delhi, Delhi 110007, India; Institute of Nano Medical Sciences, University of Delhi, Delhi 110007, India
| | - Suveen Kumar
- Department of Chemistry, University of Delhi, Delhi 110007, India.
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2
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Divya G, Jaishree G, Sivarao T, Lakshmi KVD. Microwave assisted sol-gel approach for Zr doped TiO 2 as a benign photocatalyst for bismark brown red dye pollutant. RSC Adv 2023; 13:8692-8705. [PMID: 36936827 PMCID: PMC10015583 DOI: 10.1039/d3ra00328k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Accepted: 03/07/2023] [Indexed: 03/17/2023] Open
Abstract
A microwave supported sol-gel approach was developed in this study to fabricate Zr-doped TiO2 mesoporous nanostructures for efficient photocatalytic activity on bismark brown red (BBR) dye under visible light illumination. Sophisticated analytical techniques such as X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), high resolution transmission electron microscopy (HRTEM), field emission scanning electron microscopy (FESEM) with energy dispersive X-ray spectroscopy (EDX), X-ray fluorescence analysis (XRF), Fourier transform infrared (FT-IR), ultraviolet-visible diffuse reflectance (UV-vis-DRS) spectroscopy and Brunauer-Emmet-Teller (BET) surface area analyses were used to obtain their structural, electrical: optical and spectroscopic characteristics. The analysis results revealed that the developed nanostructures exhibited strong broad absorption in the visible region with good adsorption capacity and thus enhanced photocatalytic performance. The average crystallite size was found to be 12.5 nm (UTO), 6.4 nm (ZT4), and 4.7 nm (ZT4M4) respectively. The nanocatalysts (ZT4M4) showed a decrease in bandgap and particle size with an increase in the surface area of the Zr-TiO2 nanoparticles (119 m2 g-1). In comparison to previous studies on the photocatalytic degradation of BBR dye under visible light irradiation employing Ni-S co-doped (110 min), Cu-doped TiO2 (75 min), etc., ZT4M4 exhibited a remarkable degradation rate of 99% in 50 minutes. This may be due to the hydroxyl radicals being the principle reactive species responsible for the BBR dye oxidative degradation. The present study showed that ZT4M4 was found to be the best photocatalyst for the BBR dye degradation under the optimal conditions.
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Affiliation(s)
- Gorli Divya
- Dept of Chemistry, Andhra University Visakhapatnam 530003 India
| | - G Jaishree
- Dept of Chemistry, Andhra University Visakhapatnam 530003 India
| | - T Sivarao
- Dept of Chemistry, Andhra University Visakhapatnam 530003 India
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3
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Qayyum A, Giannakoudakis DA, Łomot D, Colmenares-Quintero RF, LaGrow AP, Nikiforow K, Lisovytskiy D, Colmenares JC. Tuning the physicochemical features of titanium oxide nanomaterials by ultrasound: Elevating photocatalytic selective partial oxidation of lignin-inspired aromatic alcohols. ULTRASONICS SONOCHEMISTRY 2023; 94:106306. [PMID: 36709727 PMCID: PMC9894921 DOI: 10.1016/j.ultsonch.2023.106306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 01/16/2023] [Accepted: 01/18/2023] [Indexed: 06/18/2023]
Abstract
The research for "green" and economically feasible approaches such as (photo)catalysis especially for biomass valorization such as selective oxidation of biomass derived compounds like aromatic alcohols to corresponding aldehyde by avoiding the harsh reaction conditions and the addition of reagents concentrate the focus of attention the last years. Hence, design and development of novel photocatalyst for the partial selective oxidation is highly desirable. In this research work, ultrasonication of different frequencies (22, 40, 80 kHz) and different amplitudes was utilized as synthesis tool in order to obtain novel materials by precipitation method. The synthesized samples were characterized by using different techniques such as N2 sorption, TEM, XPS, XRD, thermal analysis, and diffuse reflectance spectroscopy. The synthesized sample by using low ultrasound frequency (22 kHz) and amplitude showed a mixed morphological and structural nature consisting of asymmetric 1-dimensional (nanorods-like), layered nano-structures and not well-defined areas, leading to elevate for metal oxide specific surface areas up to 155 m2/g. The observed 1-D nanostructures have diamentions in the range of 20-60 nm. This sample revealed the highest photo-oxidation efficiency for the selective conversion of two biomass-derived, and more specifically lignin-inspired model compounds, benzyl alcohol and cinnamyl alcohol to benzaldehyde and cinnamyl aldehyde, respectively, and hence the highest yield towards the desired aldehydes. The selective photo-oxidation activity was retained even after 5 photocatalytic cycles, while no leaching of Ti was recorded.
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Affiliation(s)
- Abdul Qayyum
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland.
| | | | - Dariusz Łomot
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | | | - Alec P LaGrow
- Scientific Imaging Section, Okinawa Institute of Science and Technology Graduate University, Kunigami-gun, Okinawa 904-0412, Japan
| | - Kostiantyn Nikiforow
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Dmytro Lisovytskiy
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Juan Carlos Colmenares
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland.
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Hassan NS, Jalil AA, Khusnun NF, Bahari MB, Hussain I, Firmansyah ML, Nugraha RE. Extra-modification of zirconium dioxide for potential photocatalytic applications towards environmental remediation: A critical review. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 327:116869. [PMID: 36455446 DOI: 10.1016/j.jenvman.2022.116869] [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: 09/23/2022] [Revised: 11/06/2022] [Accepted: 11/23/2022] [Indexed: 06/17/2023]
Abstract
Photocatalytic degradation is a valuable direction for eliminating organic pollutants in the environment because of its exceptional catalytic activity and low energy requirements. As one of the prospective photocatalysts, zirconium dioxide (ZrO2) is a promising candidate for photoactivity due to its favorable redox potential and higher chemical stability. ZrO2 has a high rate of electron-hole recombination and poor light-harvesting capabilities. Still, modification has demonstrated enhancements, especially extra-modification, and is therefore worthy of investigation. This present review provides a comprehensive overview of the extra-modifications of ZrO2 for enhanced photocatalytic performance, including coupling with other semiconductors, doping with metal, non-metal, and co-doping with metal and non-metal. The extra-modified ZrO2 showed superior performance in degrading the organic pollutant, particularly dyes and phenolic compounds. Interestingly, this review also briefly highlighted the probable mechanisms of the extra-modification of ZrO2 such as p-n heterojunction, type II heterojunction, and Z-scheme heterojunction. The latter heterojunction with excellent electron-hole space separation improved the photoactivity. Extensive research on ZrO2's photocatalytic potential is presented, including the removal of heavy metals, the redox of heavy metals and organic pollutants, and the evolution of hydrogen. Modified ZrO2's photocatalytic effectiveness depends on its band position, oxygen vacancy concentration, and metal defect sites. The opportunities and future problems of the extra-modified ZrO2 photocatalyst are also discussed. This review aims to share knowledge regarding extra-modified ZrO2 photocatalysts and inspire new environmental remediation applications.
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Affiliation(s)
- N S Hassan
- Centre of Hydrogen Energy, Institute of Future Energy, 81310 UTM Johor Bahru, Johor, Malaysia; Faculty of Chemical and Energy Engineering, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia
| | - A A Jalil
- Centre of Hydrogen Energy, Institute of Future Energy, 81310 UTM Johor Bahru, Johor, Malaysia; Faculty of Chemical and Energy Engineering, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia.
| | - N F Khusnun
- Centre of Hydrogen Energy, Institute of Future Energy, 81310 UTM Johor Bahru, Johor, Malaysia
| | - M B Bahari
- Faculty of Science, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia
| | - I Hussain
- Center for Refining & Advanced Chemicals, King Fahd University of Petroleum & Minerals, Dhahran, 31261, Saudi Arabia
| | - M L Firmansyah
- Nanotechnology Engineering, Faculty of Advanced Technology and Multidiscipline, Airlangga University, Jl. Dr. Ir. H. Soekarno, Surabaya 60115, Indonesia
| | - R E Nugraha
- Department of Chemical Engineering, Faculty of Engineering, Universitas Pembangunan Nasional "Veteran" Jawa Timur, Surabaya 60294, Indonesia
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Functionalization of titania nanotubes surface with platinum(II) complexes. Polyhedron 2022. [DOI: 10.1016/j.poly.2022.116218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Olive Mill Wastewater Remediation: From Conventional Approaches to Photocatalytic Processes by Easily Recoverable Materials. Catalysts 2022. [DOI: 10.3390/catal12080923] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Olive oil production in Mediterranean countries represents a crucial market, especially for Spain, Italy, and Greece. However, although this sector plays a significant role in the European economy, it also leads to dramatic environmental consequences. Waste generated from olive oil production processes can be divided into solid waste and olive mill wastewaters (OMWW). These latter are characterized by high levels of organic compounds (i.e., polyphenols) that have been efficiently removed because of their hazardous environmental effects. Over the years, in this regard, several strategies have been primarily investigated, but all of them are characterized by advantages and weaknesses, which need to be overcome. Moreover, in recent years, each country has developed national legislation to regulate this type of waste, in line with the EU legislation. In this scenario, the present review provides an insight into the different methods used for treating olive mill wastewaters paying particular attention to the recent advances related to the development of more efficient photocatalytic approaches. In this regard, the most advanced photocatalysts should also be easily recoverable and considered valid alternatives to the currently used conventional systems. In this context, the optimization of innovative systems is today’s object of hard work by the research community due to the profound potential they can offer in real applications. This review provides an overview of OMWW treatment methods, highlighting advantages and disadvantages and discussing the still unresolved critical issues.
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Tan Y, Li F, Zhao B, Chen W, Tian M. Hydrothermal Synthesis of a Ce-Zr-Ti Mixed Oxide Catalyst with Enhanced Catalytic Performance for a NH 3-SCR Reaction. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:14823-14832. [PMID: 34915697 DOI: 10.1021/acs.langmuir.1c02597] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
A series of mesoporous CeZrTiOx catalysts were prepared by a facile hydrothermal method. Compared with CeTiOx catalysts synthesized under the same conditions, the catalytic activity and anti-SO2 performance of the Ce1Zr1TiOx catalyst are greatly improved, and at the gas hourly space velocity (GHSV) of 60 000 h-1, the NOx removal efficiency is maintained at 90% in the temperature range of 290-500 °C. The catalytic effect of ZrO2 on the Ce-Ti catalyst NH3-SCR activity was elucidated through a series of characterizations. The results revealed that the doping of Zr could significantly improve and optimize the structure of Ce-Ti catalysts. At the same time, due to the doping of Zr, the synergistic effect between Ce and Zr in the CeZrTiOx catalyst can effectively increase oxygen mobility, total acid content, and surface adsorbed oxygen species and lead to a larger pore volume. In addition, the introduction of ZrO2 made the transformation of Ce4+ into Ce3+ more obvious, and the 2Ce4+ + Zr2+ ↔ 2Ce3+ + Zr4+ reaction greatly improved the reducibility of Ce1Zr1TiOx. Among them, the improvement of SCR performance and H2O/SO2 tolerance is due to the electronic interaction between Zr and Ce.
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Affiliation(s)
- Yifeng Tan
- College of Chemistry and Chemical Engineering, Guizhou University, Guiyang 550025, Guizhou, China
| | - Fan Li
- College of Chemistry and Chemical Engineering, Guizhou University, Guiyang 550025, Guizhou, China
| | - Bing Zhao
- College of Chemistry and Chemical Engineering, Guizhou University, Guiyang 550025, Guizhou, China
| | - Wenlin Chen
- College of Chemistry and Chemical Engineering, Guizhou University, Guiyang 550025, Guizhou, China
| | - Mengkui Tian
- College of Chemistry and Chemical Engineering, Guizhou University, Guiyang 550025, Guizhou, China
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Shen J, Gao N, Shan Y, Liu M, Liu J, Xu Y, Shen S, Chen Y. Catalytic ozone oxidation toluene over supported manganese cobalt composite: influence of catalyst support. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:64778-64792. [PMID: 34312761 DOI: 10.1007/s11356-021-15428-7] [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: 04/11/2021] [Accepted: 07/08/2021] [Indexed: 06/13/2023]
Abstract
In this study, the manganese cobalt composite (Mn-Co)-loaded SiO2, MgO, TiO2, γ-Al2O3 and silicalite-1 were prepared by ultrasonic complexation method. The catalysts were characterized by XRD, BET, SEM, TEM, H2-TPR and XPS, and the activity of catalytic oxidation of toluene was evaluated. It was found that Mn-Co loaded γ-Al2O3 (Mn2CoOx/γ-Al2O3) exhibited excellent catalytic activity. When the gas hour space velocity (GHSV) was 45,000 h-1, the removal rate of toluene reached 91.2% within 5.5 h, and the selectivity of CO2 was 71.10% at ambient temperature. The operation of Mn2CoOx/γ-Al2O3 at different temperatures was investigated, and the better toluene removal efficiency more than 80% after reacting 9h was obtained at 50 °C. The characterization results showed that better catalytic activity is related to smaller grain size, higher Mn3+/Mn4+ values and the relative content of active oxygen species (OII + OIII). Increased amounts of low state species easily led to the imbalance of the catalyst surface charge and promoted the formation of more oxygen vacancies.
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Affiliation(s)
- Jingxiu Shen
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, No. 5 XinMoFan Road, Nanjing, 210009, China
| | - Ning Gao
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, No. 5 XinMoFan Road, Nanjing, 210009, China
| | - Yao Shan
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, No. 5 XinMoFan Road, Nanjing, 210009, China
| | - Mingqing Liu
- Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing, 210042, China
| | - Jining Liu
- Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing, 210042, China
| | - Yuan Xu
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, No. 5 XinMoFan Road, Nanjing, 210009, China
| | - Shubao Shen
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, No. 5 XinMoFan Road, Nanjing, 210009, China
| | - Yingwen Chen
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, No. 5 XinMoFan Road, Nanjing, 210009, China.
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Photocatalytic Degradation of Rhodamine B and Methylene Orange Using TiO2-ZrO2 as Nanocomposite. Catalysts 2021. [DOI: 10.3390/catal11091035] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
The present research reports the synthesis of ZrO2-doped TiO2 photocatalysts at different ZrO2 contents (1, 3 and 5% wt.) synthesized by the sol–gel method. The samples were characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray diffraction, attenuated total reflectance-Fourier transform infrared, ultraviolet–visible, X-ray photoelectron spectroscopy and N2 adsorption–desorption analysis. The photocatalytic activity of the ZrO2-doped TiO2 was investigated against the dyes methyl orange and rhodamine B through mineralization studies. The ZrO2-doped TiO2 samples presented a semiglobular-ovoid agglomerate shape around 500–800 nm. The samples presented high crystallinity of the TiO2 anatase phase, XPS suggested the formation of Zr–O–Ti bonds and the samples were classified as mesoporous materials with slight changes in the optical features in comparison with pure TiO2. Our study shows that the ZrO2-doped TiO2 composites exhibited a higher photocatalytic activity than just utilizing the synthetized TiO2 and a commercial P25. The different degradation behaviors are attributed to differences in the textural properties, and to the different optical absorptions of the samples due to structural defects created by the level of doping of Zr4+ ions into the TiO2 lattice. Reaction kinetics parameters were calculated by the Langmuir–Hinshelwood model, and a third run cycle of the ZrO2-doped TiO2 at 1% wt. achieved a photocatalytic degradation of 78.1 and 75.5% for RhB and MO, respectively.
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In 2O 3/oxygen doped g-C 3N 4 towards photocatalytic BPA degradation: Balance of oxygen between metal oxides and doped g-C 3N 4. J Colloid Interface Sci 2021; 602:261-273. [PMID: 34119762 DOI: 10.1016/j.jcis.2021.06.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Revised: 05/28/2021] [Accepted: 06/01/2021] [Indexed: 11/21/2022]
Abstract
Hybrid semi-conductor heterojunction appears to be a promising technology for pollutant removal and wastewater treatment. However, the interface modification of the heterojunction and the working mechanisms remain elusive, thus impeding the development of highly efficient photocatalysis. In this work, we highlighted the key role played by the 3D/2D In2O3/oxygen doped graphitic carbon nitrides (g-C3N4) heterojunction, named In2O3/OGCN, on the photocatalytic performance. The characteristic results showed a balance of oxygen between In2O3 and OGCN, which enabled a stable interaction in the heterojunction to specifically tune the oxidation power, and this strategy can be applied to rationally control the photocatalytic activity of organic pollutants. The optimized In2O3/OGCN heterojunction demonstrated a notable photocatalytic degradation capability for bisphenol A (BPA), which was better than that of pristine In2O3 and OGCN, respectively. This photocatalyst had a great physical stability and can be recycled for further use. Meanwhile, the exceptional photodegradation capacity was attributed to spatially separated charge carriers, fast-charge transportation characteristics, and the special band gap structure of In2O3/OGCN heterojunction. In addition, the covalent bond between In-O significantly improved oxygen stability in the lattice, thereby increasing the reliability of the material. This research presents a new opportunity to fabricate metal oxides/OGCN heterojunction photocatalysts which have potential application in wastewater treatment by adjusting the oxygen between the two compounds in heterojunction.
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Kim MG, Kang JM, Lee JE, Kim KS, Kim KH, Cho M, Lee SG. Effects of Calcination Temperature on the Phase Composition, Photocatalytic Degradation, and Virucidal Activities of TiO 2 Nanoparticles. ACS OMEGA 2021; 6:10668-10678. [PMID: 34056220 PMCID: PMC8153737 DOI: 10.1021/acsomega.1c00043] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Accepted: 03/17/2021] [Indexed: 05/06/2023]
Abstract
The application of TiO2 nanoparticles in the photocatalytic treatment of chemically or biologically contaminated water is an attractive, albeit unoptimized, method for environmental remediation. Here, TiO2 nanoparticles with mixed brookite/rutile phases were synthesized and calcined at 300-1100 °C to investigate trends in photocatalytic performance. The crystallinity, crystallite size, and particle size of the calcined materials increased with calcination temperature, while the specific surface area declined significantly. The TiO2 phase composition varied: at 300 °C, mixed brookite/rutile phases were observed, whereas a brookite-to-anatase phase transformation occurred above 500 °C, reaching complete conversion at 700 °C. Above 700 °C, the anatase-to-rutile phase transformation began, with pure rutile attained at 1100 °C. The optical band gaps of the calcined TiO2 nanoparticles decreased with rising calcination temperature. The mixed anatase/rutile phase TiO2 nanoparticles calcined at 700 °C performed best in the photocatalytic degradation of methylene blue owing to the synergistic effect of the crystallinity and phase structure. The photocatalytic virus inactivation test demonstrated excellent performance against the MS2 bacteriophage, murine norovirus, and influenza virus. Therefore, the mixed anatase/rutile phase TiO2 nanoparticles calcined at 700 °C may be considered as potential candidates for environmental applications, such as water purification and virus inactivation.
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Affiliation(s)
- Min Gu Kim
- School
of Chemical Engineering, Pusan National
University, 2, Busandaehak-ro 63beon gil, Geumjeong-gu, Busan 46241, Republic
of Korea
| | - Jeong Min Kang
- School
of Chemical Engineering, Pusan National
University, 2, Busandaehak-ro 63beon gil, Geumjeong-gu, Busan 46241, Republic
of Korea
| | - Ji Eun Lee
- School
of Chemical Engineering, Pusan National
University, 2, Busandaehak-ro 63beon gil, Geumjeong-gu, Busan 46241, Republic
of Korea
| | - Kang Seok Kim
- Department
of Organic Material and Science, Pusan National
University, 2, Busandaehak-ro
63beon gil, Geumjeong-gu, Busan 46241, Republic of Korea
| | - Kwang Ho Kim
- School
of Materials Science and Engineering, Pusan
National University, 2, Busandaehak-ro 63 Beon-gil, Geumjeong-gu, Busan 46241, Republic
of Korea
| | - Min Cho
- Division
of Biotechnology, Advanced Institute of Environment and Bioscience,
College of Environmental and Bioresource Sciences, Chonbuk National University, Iksan 54596, Republic of Korea
| | - Seung Geol Lee
- School
of Chemical Engineering, Pusan National
University, 2, Busandaehak-ro 63beon gil, Geumjeong-gu, Busan 46241, Republic
of Korea
- Department
of Organic Material and Science, Pusan National
University, 2, Busandaehak-ro
63beon gil, Geumjeong-gu, Busan 46241, Republic of Korea
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12
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Catauro M, Ciprioti SV. Characterization of Hybrid Materials Prepared by Sol-Gel Method for Biomedical Implementations. A Critical Review. MATERIALS (BASEL, SWITZERLAND) 2021; 14:1788. [PMID: 33916333 PMCID: PMC8038627 DOI: 10.3390/ma14071788] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Revised: 03/26/2021] [Accepted: 04/01/2021] [Indexed: 12/23/2022]
Abstract
The interaction between tissues and biomaterials (BM) has the purpose of improving and replacing anatomical parts of the human body, avoiding the occurrence of adverse reactions in the host organism. Unfortunately, the early failure of implants cannot be currently avoided, since neither a good mixture of mechanical and chemical characteristics of materials nor their biocompatibility has been yet achieved. Bioactive glasses are recognized to be a fine class of bioactive substances for good repair and replacement. BM interact with living bones through the formation of a hydroxyapatite surface layer that is analogous to bones. Bioglasses' composition noticeably affects their biological properties, as does the synthesis method, with the best one being the versatile sol-gel technique, which includes the change of scheme from a 'sol' fluid into a 'gel'. This process is widely used to prepare many materials for biomedical implants (e.g., hip and knee prostheses, heart valves, and ceramic, glassy and hybrid materials to serve as carriers for drug release). Nanoparticles prepared by the sol-gel method are interesting systems for biomedical implementations, and particularly useful for cancer therapy. This review provides many examples concerning the synthesis and characterization of the above-mentioned materials either taken from literature and from recently prepared zirconia/polyethylene glycol (PEG) hybrids, and the corresponding results are extensively discussed.
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Affiliation(s)
- Michelina Catauro
- Department of Engineering, University of Campania “Luigi Vanvitelli”, Via Roma 29, I-813031 Aversa, Italy
| | - Stefano Vecchio Ciprioti
- Department of Basic and Applied Science for Engineering (S.B.A.I.), Sapienza University of Rome, Via del Castro Laurenziano 7, Building RM017, I-00161 Rome, Italy
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de Oliveira CRS, Batistella MA, Ulson de Souza AA, Ulson de Souza SMDAG. Synthesis of superacid sulfated TiO2 prepared by sol-gel method and its use as a titania precursor in obtaining a kaolinite/TiO2 nano-hybrid composite. POWDER TECHNOL 2021. [DOI: 10.1016/j.powtec.2020.11.063] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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14
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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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15
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Influence of the origin of carbon support on the structure and properties of TiO2 nanoparticles prepared by dip coating method. ARAB J CHEM 2019. [DOI: 10.1016/j.arabjc.2015.06.027] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
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16
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Sada Y, Yoshioka T, Nakagawa K, Shintani T, Iesako R, Kamio E, Matsuyama H. Preparation and characterization of organic chelate ligand (OCL)-templated TiO2–ZrO2 nanofiltration membranes. J Memb Sci 2019. [DOI: 10.1016/j.memsci.2019.117304] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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17
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Yao C, Ahmed MH, Yoshihara K, Mercelis B, Parise Gré C, Van Landuyt KL, Huang C, Van Meerbeek B. Bonding to enamel using alternative Enamel Conditioner/etchants. Dent Mater 2019; 35:1415-1429. [DOI: 10.1016/j.dental.2019.07.022] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Revised: 07/14/2019] [Accepted: 07/15/2019] [Indexed: 10/26/2022]
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18
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Brito JFD, Perini JAL, Perathoner S, Zanoni MVB. Turning carbon dioxide into fuel concomitantly to the photoanode-driven process of organic pollutant degradation by photoelectrocatalysis. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.03.134] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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19
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Effects of different surfactants on morphology of TiO2 and Zr-doped TiO2 nanoparticles and their applications in MB dye photocatalytic degradation. SN APPLIED SCIENCES 2019. [DOI: 10.1007/s42452-019-0522-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
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20
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Mbiri A, Wittstock G, Taffa DH, Gatebe E, Baya J, Wark M. Photocatalytic degradation of the herbicide chloridazon on mesoporous titania/zirconia nanopowders. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:34873-34883. [PMID: 29264852 DOI: 10.1007/s11356-017-1023-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2017] [Accepted: 12/11/2017] [Indexed: 06/07/2023]
Abstract
Advanced oxidation processes using semiconducting photocatalysts for the degradation of organic pollutants are a promising approach for the remediation of pesticide-contaminated wastewater. High photodegradation efficiency and stability of the photocatalyst are of key importance for practical application of the semiconductor. In this study, mesoporous TiO2/ZrO2 nanopowders were synthesized via two techniques; evaporation-induced self-assembly (EISA) and sol-gel using triblock copolymers Pluronic P123 and F127. The photodegradation activities of the composites were determined by employing the herbicide chloridazon as a model compound. Due to well-developed mesoporosity, the TiO2/ZrO2 nanocomposite synthesized by EISA displays high surface area and small crystallite sizes leading to higher photocatalytic activity than pristine TiO2 prepared under similar condition and commercial Degussa P25 nanopowder. The optimum amount of zirconium required for the highest activities was identified and found to be 0.14 and 0.05 mol% for the EISA and sol-gel-prepared samples, respectively. Systematic studies of the post-thermal treatment step for both samples show that Zr inhibits an anatase-to-rutile phase transition only up to 600 °C, at higher temperature phase separation occurs. Samples synthesized by EISA method showed enhanced degradation activity than sol-gel-synthesized samples.
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Affiliation(s)
- Anne Mbiri
- Institute of Chemistry, Carl von Ossietzky University Oldenburg, 26129, Oldenburg, Germany
- Pure and applied Sciences, Technical University of Mombasa, 90420, Mombasa, 80100, Kenya
| | - Gunther Wittstock
- Institute of Chemistry, Carl von Ossietzky University Oldenburg, 26129, Oldenburg, Germany
| | - Dereje H Taffa
- Institute of Chemistry, Carl von Ossietzky University Oldenburg, 26129, Oldenburg, Germany.
| | - Erastus Gatebe
- Department of Chemistry, Jomo Kenyatta University of Agriculture and Technology, 62000, Nairobi, 00200, Kenya
| | - Joseph Baya
- Pure and applied Sciences, Technical University of Mombasa, 90420, Mombasa, 80100, Kenya
| | - Michael Wark
- Institute of Chemistry, Carl von Ossietzky University Oldenburg, 26129, Oldenburg, Germany
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21
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Chen T, Zhang X, Jiang W, Liu J, Xie Z, Jiang W. Preparation of plant derived carbon and its application for inclusion pigments. ADV POWDER TECHNOL 2018. [DOI: 10.1016/j.apt.2018.04.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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22
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Simon SM, Chandran A, George G, Sajna MS, Valparambil P, Kumi-Barmiah E, Jose G, Biju PR, Joseph C, Unnikrishnan NV. Development of Thick Superhydrophilic TiO 2-ZrO 2 Transparent Coatings Realized through the Inclusion of Poly(methyl methacrylate) and Pluronic-F127. ACS OMEGA 2018; 3:14924-14932. [PMID: 31458158 PMCID: PMC6643965 DOI: 10.1021/acsomega.8b01940] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Accepted: 10/19/2018] [Indexed: 06/10/2023]
Abstract
A thick coating of hierarchically porous double-templated TiO2-ZrO2-PMMA-PF127 with excellent self-cleaning properties and high transmittance has been developed for the first time on glass substrates using a simple dip-coating technique. Comparative studies of this sample with a thick and transparent coating of single-templated TiO2-ZrO2-PMMA have been performed to probe the origin of its exceptional properties. The formation of the composites, successful incorporation of the polymer into the matrix, and the porous nature of the films have been studied. The presence of Ti2+ in the double-templated samples has been confirmed, which suggest the chemisorption of water on the surface of the film. The variation in the self-cleaning properties of the samples on UV-illumination has also been studied. The double-templated film is found to possess the capability of good hydrophilic retention even 2 days after UV-irradiation.
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Affiliation(s)
- Sanu M. Simon
- School
of Pure & Applied Physics, Mahatma Gandhi
University, Kottayam 686 560, Kerala, India
| | - Anoop Chandran
- Department
of Physics, St. Cyril’s College, Adoor 691 529, Kerala, India
| | - Gejo George
- School
of Pure & Applied Physics, Mahatma Gandhi
University, Kottayam 686 560, Kerala, India
| | - M. S. Sajna
- School
of Pure & Applied Physics, Mahatma Gandhi
University, Kottayam 686 560, Kerala, India
| | - Prakashan Valparambil
- School
of Pure & Applied Physics, Mahatma Gandhi
University, Kottayam 686 560, Kerala, India
| | - Eric Kumi-Barmiah
- School
of Chemical and Process Engineering, University
of Leeds, Leeds LS2 9JT, U.K.
| | - Gin Jose
- School
of Chemical and Process Engineering, University
of Leeds, Leeds LS2 9JT, U.K.
| | - P. R. Biju
- School
of Pure & Applied Physics, Mahatma Gandhi
University, Kottayam 686 560, Kerala, India
| | - Cyriac Joseph
- School
of Pure & Applied Physics, Mahatma Gandhi
University, Kottayam 686 560, Kerala, India
| | - N. V. Unnikrishnan
- School
of Pure & Applied Physics, Mahatma Gandhi
University, Kottayam 686 560, Kerala, India
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23
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Cheng K, Chhor K, Passarello JP, Colbeau-Justin C, Kanaev A. Photocatalytic Nanoparticulate Zr x
Ti 1-x
O 2
Coatings with Controlled Homogeneity of Elemental Composition. ChemistrySelect 2018. [DOI: 10.1002/slct.201801732] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Khley Cheng
- Laboratoire des Sciences des Procédés et des Matériaux, CNRS, Université Paris 13, Sorbonne Paris Cité; 93430 Villetaneuse France
| | - Khay Chhor
- Laboratoire des Sciences des Procédés et des Matériaux, CNRS, Université Paris 13, Sorbonne Paris Cité; 93430 Villetaneuse France
| | - Jean-Philippe Passarello
- Laboratoire des Sciences des Procédés et des Matériaux, CNRS, Université Paris 13, Sorbonne Paris Cité; 93430 Villetaneuse France
| | | | - Andrei Kanaev
- Laboratoire des Sciences des Procédés et des Matériaux, CNRS, Université Paris 13, Sorbonne Paris Cité; 93430 Villetaneuse France
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24
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Anisah S, Puthai W, Kanezashi M, Nagasawa H, Tsuru T. Preparation, characterization, and evaluation of TiO2-ZrO2 nanofiltration membranes fired at different temperatures. J Memb Sci 2018. [DOI: 10.1016/j.memsci.2018.07.072] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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25
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Huang C, Ding Y, Chen Y, Li P, Zhu S, Shen S. Highly efficient Zr doped-TiO 2/glass fiber photocatalyst and its performance in formaldehyde removal under visible light. J Environ Sci (China) 2017; 60:61-69. [PMID: 29031447 DOI: 10.1016/j.jes.2017.06.041] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Revised: 06/04/2017] [Accepted: 06/26/2017] [Indexed: 06/07/2023]
Abstract
Zr-doped-TiO2 loaded glass fiber (ZT/GF) composite photocatalysts with different Zr/Ti ratios were prepared with a sol-gel process. Zr4+ can replace Ti4+ in the TiO2 lattice, which is conducive to forming the anatase phase and reducing the calcination temperature. The glass fiber carrier was responsible for better dispersion and loading of Zr-doped-TiO2 particles, improving the applicability of the Zr-doped-TiO2. The ZT/GF photocatalysts were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FT-IR), ultraviolet-visible spectroscopy (UV-vis) and Barrett-Joyner-Halenda (BJH). The performance of photocatalysts with different loading was evaluated in formaldehyde degradation under visible light at room temperature. ZT/GF0.2 exhibited the highest activity, with a formaldehyde removal rate as high as 95.14% being observed, which is better than that of the photocatalyst particles alone. The stability of the catalyst was also tested, and ZT/GF exhibited excellent catalytic performance with 94.38% removal efficiency, even after seven uses.
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Affiliation(s)
- Chao Huang
- State Key Laboratory Materials of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 210009, China
| | - Yaping Ding
- State Key Laboratory Materials of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 210009, China
| | - Yingwen Chen
- State Key Laboratory Materials of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 210009, China; Jiangsu Engineering Technology Research Center of Environmental Cleaning Material, School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China.
| | - Peiwen Li
- Department of Aerospace and Mechanical Engineering, the University of Arizona, Tucson, AZ 85721, USA
| | - Shemin Zhu
- College of Material Science and Engineering, Nanjing Tech University, Nanjing 210009, China
| | - Shubao Shen
- State Key Laboratory Materials of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 210009, China
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26
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Vodišek N, Ramanujachary K, Brezová V, Lavrenčič Štangar U. Transparent titania-zirconia-silica thin films for self-cleaning and photocatalytic applications. Catal Today 2017. [DOI: 10.1016/j.cattod.2016.12.026] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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27
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Abbas N, Shao GN, Haider MS, Imran SM, Park SS, Jeon SJ, Kim HT. Inexpensive sol-gel synthesis of multiwalled carbon nanotube-TiO2 hybrids for high performance antibacterial materials. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 68:780-788. [DOI: 10.1016/j.msec.2016.07.036] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2016] [Revised: 06/20/2016] [Accepted: 07/16/2016] [Indexed: 12/25/2022]
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28
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Abbas N, Shao GN, Imran SM, Haider MS, Kim HT. Inexpensive synthesis of a high-performance Fe3O4-SiO2-TiO2 photocatalyst: Magnetic recovery and reuse. Front Chem Sci Eng 2016. [DOI: 10.1007/s11705-016-1579-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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29
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Abbas N, Shao GN, Haider MS, Imran S, Park SS, Kim HT. Sol–gel synthesis of TiO 2 -Fe 2 O 3 systems: Effects of Fe 2 O 3 content and their photocatalytic properties. J IND ENG CHEM 2016. [DOI: 10.1016/j.jiec.2016.05.015] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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30
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Majedi A, Davar F, Abbasi A, Ashrafi A. Modified Sol–Gel Based Nanostructured Zirconia Thin Film: Preparation, Characterization, Photocatalyst and Corrosion Behavior. J Inorg Organomet Polym Mater 2016. [DOI: 10.1007/s10904-016-0394-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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31
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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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32
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Sponza DT, Oztekin R. Treatment of olive mill wastewater by photooxidation with ZrO2-doped TiO2 nanocomposite and its reuse capability. ENVIRONMENTAL TECHNOLOGY 2015; 37:865-879. [PMID: 26560364 DOI: 10.1080/09593330.2015.1088579] [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] [Indexed: 06/05/2023]
Abstract
Zirconium dioxide (zirconia, ZrO2)-doped TiO2 (TiO2/ZrO2) nanocomposite was used for the photocatalytic oxidation of pollutant parameters [COD components (CODtotal, CODdissolved and CODinert)], polyphenols (catechol, 3-hydroxybenzoic acid, tyrosol and 4-hydroxybenzoic acid) and total polyaromatic amines [aniline, 4-nitroaniline, o-toluidine and o-anisidine] from the olive mill effluent wastewaters at different operational conditions such as at different mass ratios of ZrO2 (50, 25, 14, 10 and 5 wt%) in the TiO2/ZrO2 nanocomposite, at different TiO2/ZrO2 photocatalyst concentrations (1, 4, 15 and 50 mg/L) and pH values (4.0-7.0-10.0) under 300 W UV irradiations, respectively. Under the optimized conditions (pH = 4.6, 15 mg/L ZrO2/TiO2 nanocomposite with a ZrO2 mass ratio of 14 wt%, 300 W UV light, after 60 min photooxidation time, at 21°C), the maximum CODdissolved, total phenol and total aromatic amines photooxidation yields were 99%, 89% and 95%, respectively. High pollutant removal (89%) yields after sequential five times utilization of ZrO2/TiO2 nanocomposite show that this catalyst can be effectively used commercially in the treatment of olive mill effluent.
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Affiliation(s)
- Delia Teresa Sponza
- a Department of Environmental Engineering, Engineering Faculty , Dokuz Eylül University , Tınaztepe Campus, 35160 Buca/İzmir , Turkey
| | - Rukiye Oztekin
- a Department of Environmental Engineering, Engineering Faculty , Dokuz Eylül University , Tınaztepe Campus, 35160 Buca/İzmir , Turkey
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33
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Hydrothermal synthesis of mesoporous WO3–TiO2 powders with enhanced photocatalytic activity. ADV POWDER TECHNOL 2015. [DOI: 10.1016/j.apt.2015.07.019] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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34
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Syoufian A, Manako Y, Nakashima K. Sol–gel preparation of photoactive srilankite-type zirconium titanate hollow spheres by templating sulfonated polystyrene latex particles. POWDER TECHNOL 2015. [DOI: 10.1016/j.powtec.2015.04.059] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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35
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Mutuma BK, Shao GN, Kim WD, Kim HT. Sol–gel synthesis of mesoporous anatase–brookite and anatase–brookite–rutile TiO2 nanoparticles and their photocatalytic properties. J Colloid Interface Sci 2015; 442:1-7. [DOI: 10.1016/j.jcis.2014.11.060] [Citation(s) in RCA: 129] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2014] [Revised: 11/20/2014] [Accepted: 11/24/2014] [Indexed: 10/24/2022]
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36
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Basahel SN, Ali TT, Mokhtar M, Narasimharao K. Influence of crystal structure of nanosized ZrO2 on photocatalytic degradation of methyl orange. NANOSCALE RESEARCH LETTERS 2015; 10:73. [PMID: 25852369 PMCID: PMC4385125 DOI: 10.1186/s11671-015-0780-z] [Citation(s) in RCA: 150] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2014] [Accepted: 01/22/2015] [Indexed: 05/19/2023]
Abstract
Nanosized ZrO2 powders with near pure monoclinic, tetragonal, and cubic structures synthesized by various methods were used as catalysts for photocatalytic degradation of methyl orange. The structural and textural properties of the samples were analyzed by X-ray diffraction, Raman spectroscopy, TEM, UV-vis, X-ray photoelectron spectroscopy (XPS), and N2 adsorption measurements. The performance of synthesized ZrO2 nanoparticles in the photocatalytic degradation of methyl orange under UV light irradiation was evaluated. The photocatalytic activity of the pure monoclinic ZrO2 sample is higher than that of the tetragonal and cubic ZrO2 samples under optimum identical conditions. The characterization results revealed that monoclinic ZrO2 nanoparticles possessed high crystallinity and mesopores with diameter of 100 Å. The higher activity of the monoclinic ZrO2 sample for the photocatalytic degradation of methyl orange can be attributed to the combining effects of factors including the presence of small amount of oxygen-deficient zirconium oxide phase, high crystallinity, large pores, and high density of surface hydroxyl groups.
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Affiliation(s)
- Sulaiman N Basahel
- />Department of Chemistry, Faculty of Science, King Abdulaziz University, P. O. Box, 80203, Jeddah, 21589 Kingdom of Saudi Arabia
| | - Tarek T Ali
- />Department of Chemistry, Faculty of Science, King Abdulaziz University, P. O. Box, 80203, Jeddah, 21589 Kingdom of Saudi Arabia
- />Chemistry Department, Faculty of Science, Sohag University, P.O. Box 82524, Sohag, 82524 Egypt
| | - Mohamed Mokhtar
- />Department of Chemistry, Faculty of Science, King Abdulaziz University, P. O. Box, 80203, Jeddah, 21589 Kingdom of Saudi Arabia
- />Physical Chemistry Department, National Research Centre, El Buhouth St., Dokki, Cairo, 12622 Egypt
| | - Katabathini Narasimharao
- />Department of Chemistry, Faculty of Science, King Abdulaziz University, P. O. Box, 80203, Jeddah, 21589 Kingdom of Saudi Arabia
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