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Predoană L, Petcu G, Preda S, Pandele-Cușu J, Petrescu SV, Băran A, Apostol NG, Costescu RM, Surdu VA, Vasile BŞ, Ianculescu AC. Copper-/Zinc-Doped TiO 2 Nanopowders Synthesized by Microwave-Assisted Sol-Gel Method. Gels 2023; 9:gels9040267. [PMID: 37102879 PMCID: PMC10137937 DOI: 10.3390/gels9040267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Revised: 03/17/2023] [Accepted: 03/22/2023] [Indexed: 04/28/2023] Open
Abstract
Using the microwave-assisted sol-gel method, Zn- and Cu-doped TiO2 nanoparticles with an anatase crystalline structure were prepared. Titanium (IV) butoxide was used as a TiO2 precursor, with parental alcohol as a solvent and ammonia water as a catalyst. Based on the TG/DTA results, the powders were thermally treated at 500 °C. XRD and XRF revealed the presence of a single-phase anatase and dopants in the thermally treated nanoparticles. The surface of the nanoparticles and the oxidation states of the elements were studied using XPS, which confirmed the presence of Ti, O, Zn, and Cu. The photocatalytic activity of the doped TiO2 nanopowders was tested for the degradation of methyl-orange (MO) dye. The results indicate that Cu doping increases the photoactivity of TiO2 in the visible-light range by narrowing the band-gap energy.
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Affiliation(s)
- Luminița Predoană
- Institute of Physical Chemistry "Ilie Murgulescu" of the Romanian Academy, 202 Splaiul Independenței, 060021 Bucharest, Romania
| | - Gabriela Petcu
- Institute of Physical Chemistry "Ilie Murgulescu" of the Romanian Academy, 202 Splaiul Independenței, 060021 Bucharest, Romania
| | - Silviu Preda
- Institute of Physical Chemistry "Ilie Murgulescu" of the Romanian Academy, 202 Splaiul Independenței, 060021 Bucharest, Romania
| | - Jeanina Pandele-Cușu
- Institute of Physical Chemistry "Ilie Murgulescu" of the Romanian Academy, 202 Splaiul Independenței, 060021 Bucharest, Romania
| | - Simona Viorica Petrescu
- Institute of Physical Chemistry "Ilie Murgulescu" of the Romanian Academy, 202 Splaiul Independenței, 060021 Bucharest, Romania
| | - Adriana Băran
- Institute of Physical Chemistry "Ilie Murgulescu" of the Romanian Academy, 202 Splaiul Independenței, 060021 Bucharest, Romania
| | - Nicoleta G Apostol
- National Institute of Materials Physics, Atomiștilor 405A, 077125 Măgurele, Romania
| | - Ruxandra M Costescu
- National Institute of Materials Physics, Atomiștilor 405A, 077125 Măgurele, Romania
| | - Vasile-Adrian Surdu
- Department of Science and Engineering of Oxide Materials and Nanomaterials, Faculty of Chemical Engineering and Biotechnologies, "Politehnica" University of Bucharest, 1-7 Gh. Polizu, 011061 Bucharest, Romania
| | - Bogdan Ştefan Vasile
- Department of Science and Engineering of Oxide Materials and Nanomaterials, Faculty of Chemical Engineering and Biotechnologies, "Politehnica" University of Bucharest, 1-7 Gh. Polizu, 011061 Bucharest, Romania
| | - Adelina C Ianculescu
- Department of Science and Engineering of Oxide Materials and Nanomaterials, Faculty of Chemical Engineering and Biotechnologies, "Politehnica" University of Bucharest, 1-7 Gh. Polizu, 011061 Bucharest, Romania
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Kanchanatip E, Kiattisaksiri P, Neramittagapong A. Photocatalytic treatment of real liquid effluent from hydrothermal carbonization of agricultural waste using metal doped TiO 2/UV system. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2023; 58:246-255. [PMID: 36855964 DOI: 10.1080/10934529.2023.2184156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 02/15/2023] [Accepted: 02/15/2023] [Indexed: 06/18/2023]
Abstract
This study investigated treatment of real liquid effluent generated from hydrothermal carbonization (HTC) of macadamia nut shell by employing transition metals Cu, Ni, and Fe doped titanium dioxide (TiO2) photocatalysts. The anatase TiO2 based photocatalysts were prepared via sol-gel method, and calcined at 400 °C. The modification with metal dopants was performed via ultrasonic assisted incipient wetness impregnation method. The prepared photocatalysts were characterized using XRD, UV-Vis DRS, SEM-EDX, and N2 physisorption. The influence of metal dopants, types of TiO2 support, and initial pH of the wastewater on the photocatalytic degradation performance of total organic carbon (TOC) and chemical oxygen demand (COD) in the wastewater were investigated. The results revealed that Fe doped TiO2 exhibited the highest photocatalytic activity followed by Cu and Ni, respectively. Among all, Fe doped anatase TiO2 were the most promising catalyst as it performed the highest removal of 75.1% for TOC and 94.1% for COD after 1 h irradiation at pH 4, achieving the lowest TOC and COD concentration of 405.62 mg/L and 91.26 mg/L, respectively. The findings suggested that photocatalytic degradation of HTC liquid effluent could be a potential treatment before releasing the wastewater to the environment.
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Affiliation(s)
- Ekkachai Kanchanatip
- Department of Chemical Engineering, Faculty of Engineering, Khon Kaen University, Khon Kaen, Thailand
- Faculty of Science and Engineering, Kasetsart University, Sakon Nakhon, Thailand
| | - Pradabduang Kiattisaksiri
- Faculty of Public Health, Thammasat University (Lampang Campus), Lampang, Thailand
- Center of Excellence in Environmental Catalysis and Adsorption, Faculty of Engineering, Thammasat University, Pathumthani, Thailand
| | - Arthit Neramittagapong
- Department of Chemical Engineering, Faculty of Engineering, Khon Kaen University, Khon Kaen, Thailand
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Doping of TiO2 Using Metal Waste (Door Key) to Improve Its Photocatalytic Efficiency in the Mineralization of an Emerging Contaminant in an Aqueous Environment. WATER 2022. [DOI: 10.3390/w14091389] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Photocatalysis is an effective advanced oxidation process to mineralize recalcitrant contaminants in aqueous media. TiO2 is the most used photocatalyst in this type of process. To improve the deficiencies of this material, one of the most used strategies has been to dope TiO2 with metallic ions. Chemical reagents are often used as dopant precursors. However, due to the depletion of natural resources, in this work it was proposed to substitute chemical reagents and instead use a metallic residue (door key) as a doping precursor. The materials were synthesized using the sol–gel method and calcined at 400 °C to obtain the crystal structure of anatase. The characterization of the materials was carried out using X-ray diffraction (XRD), transmission electron microscopy (TEM), diffuse reflectance spectroscopy (DRS), scanning electron microscopy–energy-dispersive X-ray analysis (SEM-EDX) methods X-ray photoelectron spectroscopy (XPS), and inductively coupled plasma optical emission spectroscopy (ICP-OES). The results obtained indicate that Cu+/Cu2+ and Zn2+ ions coexist in the support, which modifies the physicochemical properties of TiO2 and improves its photocatalytic efficiency. The synergistic effect of the dopants in TiO2 allowed the mineralization of diclofenac in an aqueous medium when T-DK (1.0) was used as photocatalyst and simulated solar radiation as an activation source.
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Zhu X, Xiong J, Wang Z, Chen R, Cheng G, Wu Y. Metallic Copper-Containing Composite Photocatalysts: Fundamental, Materials Design, and Photoredox Applications. SMALL METHODS 2022; 6:e2101001. [PMID: 35174995 DOI: 10.1002/smtd.202101001] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Revised: 11/21/2021] [Indexed: 06/14/2023]
Abstract
Semiconductor photocatalysis has long been regarded as a potential solution to tackle the energy and environmental challenges since the first discovery of water splitting by TiO2 almost 50 years ago. The past few years have seen a tremendous flurry of research interest in the modification of semiconductors because of their shortcomings in the aspects of solar harvesting, electron-hole pairs separation, and utilization of photogenerated carriers. Among the various strategies, the introduction of metallic copper into the photocatalysis system can not only enhance the absorption of sunlight and the separation efficiency of photogenerated electrons and holes, but also increase the adsorption ability of substrate and the number of active sites, so as to realize the high solar to chemical energy conversion efficiency. This review focuses on the rational design of copper-based composites and their applications in photoredox catalysis. First, the preparation methods of metallic copper-containing composites are discussed. Then, the applications of different types of copper-based composites in the photocatalytic removal of pollutants, splitting of water to hydrogen production, reduction of carbon dioxide, and conversion of organic matter are introduced. Finally, the opportunities and challenges in the design and synthesis of copper-based composites and their applications in the photocatalysis are prospected.
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Affiliation(s)
- Xueteng Zhu
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Donghu New & High Technology Development Zone, Wuhan, 430205, P. R. China
| | - Jinyan Xiong
- College of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan, 430200, China
| | - Zhiyuan Wang
- Henan Institute of Advanced Technology, Zhengzhou University, Zhengzhou, 450002, P. R. China
| | - Rong Chen
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Donghu New & High Technology Development Zone, Wuhan, 430205, P. R. China
- Henan Institute of Advanced Technology, Zhengzhou University, Zhengzhou, 450002, P. R. China
| | - Gang Cheng
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Donghu New & High Technology Development Zone, Wuhan, 430205, P. R. China
| | - Yuen Wu
- Department of Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), University of Science and Technology of China, Hefei, 230026, P. R. China
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Jiang X, Fuji M. Facile Preparation of Nanosized MoP as Cocatalyst Coupled with TiO2 for Highly Efficient Photocatalytic H2 Production. Catal Letters 2022. [DOI: 10.1007/s10562-021-03888-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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Photocatalysis: Activity of Nanomaterials. Catalysts 2021. [DOI: 10.3390/catal11050611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
Abstract
Photocatalytic processes have shown great potential as a low-cost, green-chemical, and sustainable technology able to address energy and environmental issues [...]
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Abstract
Due to its characteristics, hydrogen is considered the energy carrier of the future. Its use as a fuel generates reduced pollution, as if burned it almost exclusively produces water vapor. Hydrogen can be produced from numerous sources, both of fossil and renewable origin, and with as many production processes, which can use renewable or non-renewable energy sources. To achieve carbon neutrality, the sources must necessarily be renewable, and the production processes themselves must use renewable energy sources. In this review article the main characteristics of the most used hydrogen production methods are summarized, mainly focusing on renewable feedstocks, furthermore a series of relevant articles published in the last year, are reviewed. The production methods are grouped according to the type of energy they use; and at the end of each section the strengths and limitations of the processes are highlighted. The conclusions compare the main characteristics of the production processes studied and contextualize their possible use.
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Li R, Chen H, Xiong J, Xu X, Cheng J, Liu X, Liu G. A Mini Review on Bismuth-Based Z-Scheme Photocatalysts. MATERIALS 2020; 13:ma13225057. [PMID: 33182570 PMCID: PMC7697340 DOI: 10.3390/ma13225057] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 11/05/2020] [Accepted: 11/05/2020] [Indexed: 02/07/2023]
Abstract
Recently, the bismuth-based (Bi-based) Z-scheme photocatalysts have been paid great attention due to their good solar energy utilization capacity, the high separation rate of their photogenerated hole-electron pairs, and strong redox ability. They are considerably more promising materials than single semiconductors for alleviating the energy crisis and environmental deterioration by efficiently utilizing sunlight to motivate various photocatalytic reactions for energy production and pollutant removal. In this review, the traits and recent research progress of Bi-based semiconductors and recent achievements in the synthesis methods of Bi-based direct Z-scheme heterojunction photocatalysts are explored. The recent photocatalytic applications development of Bi-based Z-scheme heterojunction photocatalysts in environmental pollutants removal and detection, water splitting, CO2 reduction, and air (NOx) purification are also described concisely. The challenges and future perspective in the studies of Bi-based Z-scheme heterojunction photocatalysts are discussed and summarized in the conclusion of this mini review.
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Affiliation(s)
- Ruizhen Li
- School of Chemistry and Environmental Engineering, Sichuan University of Science and Engineering, Huixing Rd, Ziliujing District, Zigong 64300, China
- State Environmental Protection Key Laboratory of Synergetic Control and Joint Remediation for Soil & Water Pollution, Chengdu University of Technology, No. 1 Dongsan Road, Er'xian Bridge, Chengdu 610059, China
| | - Hanyang Chen
- School of Chemistry and Environmental Engineering, Sichuan University of Science and Engineering, Huixing Rd, Ziliujing District, Zigong 64300, China
| | - Jianrong Xiong
- School of Chemistry and Environmental Engineering, Sichuan University of Science and Engineering, Huixing Rd, Ziliujing District, Zigong 64300, China
| | - Xiaoying Xu
- School of Chemistry and Environmental Engineering, Sichuan University of Science and Engineering, Huixing Rd, Ziliujing District, Zigong 64300, China
| | - Jiajia Cheng
- School of Chemistry and Environmental Engineering, Sichuan University of Science and Engineering, Huixing Rd, Ziliujing District, Zigong 64300, China
| | - Xingyong Liu
- School of Chemical Engineering, Sichuan University of Science and Engineering, Huixing Rd, Ziliujing District, Zigong 64300, China
| | - Guo Liu
- State Environmental Protection Key Laboratory of Synergetic Control and Joint Remediation for Soil & Water Pollution, Chengdu University of Technology, No. 1 Dongsan Road, Er'xian Bridge, Chengdu 610059, China
- State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, No. 1 Dongsan Road, Er'xian Bridge, Chengdu 610059, China
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