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Hazaraimi MH, Goh PS, Lau WJ, Ismail AF, Wu Z, Subramaniam MN, Lim JW, Kanakaraju D. The state-of-the-art development of photocatalysts for the degradation of persistent herbicides in wastewater. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 843:156975. [PMID: 35764157 DOI: 10.1016/j.scitotenv.2022.156975] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Revised: 06/15/2022] [Accepted: 06/21/2022] [Indexed: 06/15/2023]
Abstract
Herbicides are one of the most recurring pollutants in the aquatic system due to their widespread usage in the agriculture sector for weed control. Semiconductor-based photocatalysts have gained recognition due to their ability to degrade and mineralize pollutants into harmless by-products completely. Lately, many studies have been done to design photocatalysts with efficient separation of photogenerated charge carriers and enhanced light absorption. Photocatalyst engineering through doping with metal and non-metal elements and the formation of heterojunction are proven effective for minimizing the recombination of electron-hole pairs and enlarging the absorption in the visible light region. This review focuses on discussing and evaluating the recent progress in the types of photocatalysts and their performance in the remediation of herbicides in wastewater. The development of innovative hybrid technologies is also highlighted. The limitations and challenges of photocatalysis technology in the present literature have been identified, and future studies are recommended.
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Affiliation(s)
- M H Hazaraimi
- Advanced Membrane Technology Research Center, School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310 Skudai, Johor, Malaysia
| | - P S Goh
- Advanced Membrane Technology Research Center, School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310 Skudai, Johor, Malaysia.
| | - W J Lau
- Advanced Membrane Technology Research Center, School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310 Skudai, Johor, Malaysia
| | - A F Ismail
- Advanced Membrane Technology Research Center, School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310 Skudai, Johor, Malaysia
| | - Z Wu
- Aston Institute of Materials Research, School of Engineering and Applied Science, Aston University, Birmingham B4 7ET, UK
| | - M N Subramaniam
- Aston Institute of Materials Research, School of Engineering and Applied Science, Aston University, Birmingham B4 7ET, UK
| | - J W Lim
- HICoE-Centre for Biofuel and Biochemical Research, Institute of Self-Sustainable Building, Department of Fundamental and Applied Sciences, Universiti Teknologi PETRONAS, Seri Iskandar, Perak Darul Ridzuan 32610, Malaysia
| | - D Kanakaraju
- Faculty of Resource and Science Technology, Universiti Malaysia, Sarawak, 94300 Kota Samarahan, Sarawak, Malaysia
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Sanchez Tobon C, Ljubas D, Mandić V, Panžić I, Matijašić G, Ćurković L. Microwave-Assisted Synthesis of N/TiO 2 Nanoparticles for Photocatalysis under Different Irradiation Spectra. NANOMATERIALS 2022; 12:nano12091473. [PMID: 35564182 PMCID: PMC9104789 DOI: 10.3390/nano12091473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Revised: 04/20/2022] [Accepted: 04/22/2022] [Indexed: 12/10/2022]
Abstract
Nitrogen-doped TiO2 (N/TiO2) photocatalyst nanoparticles were derived by the environmentally friendly and cost-effective microwave-assisted synthesis method. The samples were prepared at different reaction parameters (temperature and time) and precursor ratio (amount of nitrogen source; urea). The obtained materials were characterized by X-ray diffraction (XRD), photoelectron spectroscopy (XPS), Raman spectroscopy (RS), infrared spectroscopy (FTIR), diffuse reflectance spectroscopy (DRS), electron microscopy (SEM-EDS), and nitrogen adsorption/desorption isotherms. Two cycles of optimizations were conducted to determine the best reaction temperature and time, as well as N content. The phase composition for all N/TiO2 nanomaterials was identified as photoactive anatase. The reaction temperature was found to be the most relevant parameter for the course of the structural evolution of the samples. The nitrogen content was the least relevant for the development of the particle morphology, but it was important for photocatalytic performance. The photocatalytic activity of N/TiO2 nanoparticle aqueous suspensions was evaluated by the degradation of antibiotic ciprofloxacin (CIP) under different irradiation spectra: ultraviolet A light (UVA), simulated solar light, and visible light. As expected, all prepared samples demonstrated efficient CIP degradation. For all irradiation sources, increasing synthesis temperature and increasing nitrogen content further improved the degradation efficiencies.
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Affiliation(s)
- Camilo Sanchez Tobon
- Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, 10000 Zagreb, Croatia
- Correspondence: (C.S.T.); (D.L.); (L.Ć.)
| | - Davor Ljubas
- Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, 10000 Zagreb, Croatia
- Correspondence: (C.S.T.); (D.L.); (L.Ć.)
| | - Vilko Mandić
- Faculty of Chemical Engineering and Technology, University of Zagreb, 10000 Zagreb, Croatia; (V.M.); (I.P.); (G.M.)
| | - Ivana Panžić
- Faculty of Chemical Engineering and Technology, University of Zagreb, 10000 Zagreb, Croatia; (V.M.); (I.P.); (G.M.)
| | - Gordana Matijašić
- Faculty of Chemical Engineering and Technology, University of Zagreb, 10000 Zagreb, Croatia; (V.M.); (I.P.); (G.M.)
| | - Lidija Ćurković
- Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, 10000 Zagreb, Croatia
- Correspondence: (C.S.T.); (D.L.); (L.Ć.)
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3
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Xing J, Li N, Liang Y, Zhu F. Microwave-assisted synthesis of magnetic Pb(II)-imprinted-poly(schiff base-co-MAA) for selective recognition and extraction of Pb(II) from industrial wastewater. J DISPER SCI TECHNOL 2021. [DOI: 10.1080/01932691.2021.1930033] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Junde Xing
- School of Biomedical Engineering, Taiyuan University of Technology, Taiyuan, Shanxi, P. R. China
| | - Na Li
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, Shanxi, P. R. China
| | - Yukun Liang
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, Shanxi, P. R. China
| | - Fang Zhu
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, Shanxi, P. R. China
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Wang TT, Liu JY, An JD, Shi YF, Zhang YY, Huo JZ, Huang ZG, Liu YY, Ding B. Hydrothermal synthesis of two-dimensional cadmium(II) micro-porous coordination material based on Bi-functional building block and its application in highly sensitive detection of Fe 3+ and Cr 2O 72. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 254:119655. [PMID: 33744702 DOI: 10.1016/j.saa.2021.119655] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Revised: 02/19/2021] [Accepted: 03/01/2021] [Indexed: 06/12/2023]
Abstract
Metal-organic framework (MOFs), also known as porous coordination polymers (PCPs), is a new kind of crystalline porous materials, which has received extensive attention in the past few decades. As a new type of sensing material, MOFs stand out from many other traditional fluorescence sensors because of its crystal characteristics, structural diversity, stable porosity and adjustable functional characteristics. In this work, the bi-functional building block containing aromatic carboxylic acid and triazole moieties, namely 3-(1H-1,3,4-triazol-1-yl) benzoic acid, was selected as the linker to synthesize {[Cd(µ5-L)⋅I}n (1, HL = 3-(1H-1,3,4-triazol-1-yl)benzoic acid) by hydrothermal method with transition CdII metal centers. Firstly, the preliminary characterization of 1 was carried out by means of PXRD, FT-IR, and then the UV and fluorescence tests were conducted to study the fluorescence properties of 1. The crystal structure analysis indicates that CdII is the center and the ligand is bridged to form a two-dimensional porous structure. In addition, 1 has good selectivity for Fe3+ and Cr2O72-, meanwhile, it has high detection sensitivity (Ksv quenching efficiency for Fe3+: 1.2 × 104 M-1 and Cr2O72- 1.85 × 104 M-1) and low detection limit (Fe3+: 19.21 μM and Cr2O72-: 12.46 μM). The results of photoluminescence test show that 1 can detect cations and anions with high sensitivity, resist the interference of other ions, and have good reusability. As far as we know, 1 is the first example of ultra-stable two-dimensional (2D) Cadmium (II) microporous coordination material as a fluorescence sensor for Fe3+ and Cr2O72-.
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Affiliation(s)
- Tian-Tian Wang
- Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry (Tianjin Normal University), Ministry of Education, Tianjin Key Laboratoryof Structure and Performance for Functional Molecule, College of Chemistry, Tianjin Normal University, 393 Binshui West Road, Tianjin 300387, PR China
| | - Jing-Yi Liu
- Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry (Tianjin Normal University), Ministry of Education, Tianjin Key Laboratoryof Structure and Performance for Functional Molecule, College of Chemistry, Tianjin Normal University, 393 Binshui West Road, Tianjin 300387, PR China
| | - Jun-Dan An
- Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry (Tianjin Normal University), Ministry of Education, Tianjin Key Laboratoryof Structure and Performance for Functional Molecule, College of Chemistry, Tianjin Normal University, 393 Binshui West Road, Tianjin 300387, PR China
| | - Yang-Fan Shi
- Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry (Tianjin Normal University), Ministry of Education, Tianjin Key Laboratoryof Structure and Performance for Functional Molecule, College of Chemistry, Tianjin Normal University, 393 Binshui West Road, Tianjin 300387, PR China
| | - Yi-Yun Zhang
- Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry (Tianjin Normal University), Ministry of Education, Tianjin Key Laboratoryof Structure and Performance for Functional Molecule, College of Chemistry, Tianjin Normal University, 393 Binshui West Road, Tianjin 300387, PR China
| | - Jian-Zhong Huo
- Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry (Tianjin Normal University), Ministry of Education, Tianjin Key Laboratoryof Structure and Performance for Functional Molecule, College of Chemistry, Tianjin Normal University, 393 Binshui West Road, Tianjin 300387, PR China
| | - Zheng-Guo Huang
- Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry (Tianjin Normal University), Ministry of Education, Tianjin Key Laboratoryof Structure and Performance for Functional Molecule, College of Chemistry, Tianjin Normal University, 393 Binshui West Road, Tianjin 300387, PR China
| | - Yuan-Yuan Liu
- Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry (Tianjin Normal University), Ministry of Education, Tianjin Key Laboratoryof Structure and Performance for Functional Molecule, College of Chemistry, Tianjin Normal University, 393 Binshui West Road, Tianjin 300387, PR China
| | - Bin Ding
- Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry (Tianjin Normal University), Ministry of Education, Tianjin Key Laboratoryof Structure and Performance for Functional Molecule, College of Chemistry, Tianjin Normal University, 393 Binshui West Road, Tianjin 300387, PR China; Tianjin Normal University, 393 Binshui West Road, Tianjin 300387, PR China.
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Paumo HK, Dalhatou S, Katata-Seru LM, Kamdem BP, Tijani JO, Vishwanathan V, Kane A, Bahadur I. TiO2 assisted photocatalysts for degradation of emerging organic pollutants in water and wastewater. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.115458] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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6
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Mendiola-Alvarez SY, Palomino-Cabello C, Hernández-Ramírez A, Turnes-Palomino G, Guzmán-Mar JL, Hinojosa-Reyes L. Coupled heterogeneous photocatalysis using a P-TiO2-αFe2O3 catalyst and K2S2O8 for the efficient degradation of a sulfonamide mixture. J Photochem Photobiol A Chem 2020. [DOI: 10.1016/j.jphotochem.2020.112485] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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7
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Liu W, Lang Z. The structure and self-regeneration performance of Salix psammophila-activated carbon modified by Ag and N co-doped TiO 2. RSC Adv 2020; 10:3844-3852. [PMID: 35492629 PMCID: PMC9048427 DOI: 10.1039/c9ra10305h] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Accepted: 01/07/2020] [Indexed: 11/21/2022] Open
Abstract
In this study, Salix psammophila activated carbon (AC) was modified by immersing it in an AgNO3 solution and coating it with an N-doped TiO2 film to improve its self-regeneration performance in visible light. Ag+ was adsorbed and reduced to Ag nanoparticles by AC. Ti element only existed as Ti4+, and N element was incorporated into TiO2 mainly in the form of interstitial nitrogen. The photodegradation of Ag-N-TiO2-AC (AC coated with Ag and N co-modified TiO2) was enhanced under visible light irradiation because of its three inherent structures: (1) Ag and N co-modified TiO2 had a smaller average crystal size; (2) with a low bandgap (1.59 eV), the photoresponse region of Ag and N co-modified TiO2 was greatly extended; (3) the lifetime of the photogenerated holes was increased. With the increase in the AgNO3 dosage, the Ag-N-TiO2-AC photodegradation increased, while its adsorption decreased. Because of these synergistic effects, 0.05Ag-0.1N-TiO2-AC (where 0.05 is the dosage of AgNO3, g) presented the best self-regeneration performance under visible light irradiation. In this study, Salix psammophila activated carbon (AC) was modified by immersing it in an AgNO3 solution and coating it with an N-doped TiO2 film to improve its self-regeneration performance in visible light.![]()
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Affiliation(s)
- Wenjing Liu
- College of Materials Science and Art Design, Inner Mongolia Agricultural University Hohhot 010018 China
| | - Zhen Lang
- College of Materials Science and Art Design, Inner Mongolia Agricultural University Hohhot 010018 China
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Mendiola-Alvarez S, Hernández-Ramírez A, Guzmán-Mar J, Maya-Treviño M, Caballero-Quintero A, Hinojosa-Reyes L. A novel P-doped Fe2O3-TiO2 mixed oxide: Synthesis, characterization and photocatalytic activity under visible radiation. Catal Today 2019. [DOI: 10.1016/j.cattod.2019.01.004] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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9
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Yang H, Hu Y, Wang X, Fu W, Tian H, Alam E. Investigation on synthesis of ion-imprinted mesoporous adsorbents by using ultrasound- and microwave-assisted preparation and their dynamic adsorption properties on heavy metals. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:10987-10999. [PMID: 30783933 DOI: 10.1007/s11356-019-04436-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2018] [Accepted: 01/29/2019] [Indexed: 06/09/2023]
Abstract
Removal of the heavy metal ions in aqueous solution is an important technology for waste water treatment. The effects of using ultrasonic and microwave on synthesizing Pb2+, Zn2+, and Cu2+ imprinted mesoporous adsorbents (Pb-IMA-UM, Zn-IMA-UM, and Cu-IMA-UM) and their dynamic adsorption properties were studied. The microstructure and composition of the ion-imprinted mesoporous adsorbents were discussed in detail by TEM, FTIR, N2 adsorption-desorption, XRD, and EDS. The pore sizes of mesoporous absorbents were improved more uniformly by using ultrasonic agitation than magnetic stirring. The elution efficiency of imprinting ions can be enhanced by microwave elution. Prepared Pb-IMA-UM, Zn-IMA-UM, and Cu-IMA-UM were used for dynamic adsorption study of heavy metals. The detected optimal feed rate was 20.0 mL/min and the influent concentration was 60 mg/L; the equilibrium adsorption capacities of Pb-IMA-UM, Cu-IMA-UM, and Zn-IMA-UM could reach 198 mg/g, 51.5 mg/g, and 57.3 mg/g, respectively. The dynamic regeneration performance of the adsorbent was also investigated with the Cu-IMA-UM sample. The adsorption rate remained above 89% after five dynamic regeneration experiments. At last, the actual wastewater from an electroplating industry was used as the research object. Three groups of dynamic adsorption coefficient contours of Pb-IMA-UM, Zn-IMA-UM, and Cu-IMA-UM were obtained when influents flowed into three adsorption columns separately. The experimental results showed that an ion-imprinted adsorbent had a much better adsorption capacity of imprinted ions under the various metals mixed conditions.
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Affiliation(s)
- Hong Yang
- School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou, 221116, People's Republic of China.
| | - Yanling Hu
- School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou, 221116, People's Republic of China
| | - Xiaoyu Wang
- School of Chemical Engineering, The University of Queensland, St. Lucia, QLD, 4072, Australia
| | - Weng Fu
- School of Chemical Engineering, The University of Queensland, St. Lucia, QLD, 4072, Australia
| | - Huijuan Tian
- School of Geomatics and Marine Information, Huaihai Institute of Technology, Lianyungang, 222005, People's Republic of China
| | - Easar Alam
- School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou, 221116, People's Republic of China
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An overview of solar/visible light-driven heterogeneous photocatalysis for water purification: TiO2- and ZnO-based photocatalysts used in suspension photoreactors. J IND ENG CHEM 2019. [DOI: 10.1016/j.jiec.2018.11.025] [Citation(s) in RCA: 133] [Impact Index Per Article: 26.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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11
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Mendiola-Alvarez SY, Hernández-Ramírez MA, Guzmán-Mar JL, Garza-Tovar LL, Hinojosa-Reyes L. Phosphorous-doped TiO 2 nanoparticles: synthesis, characterization, and visible photocatalytic evaluation on sulfamethazine degradation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:4180-4191. [PMID: 29797201 DOI: 10.1007/s11356-018-2314-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Accepted: 05/13/2018] [Indexed: 06/08/2023]
Abstract
Mesoporous phosphorous-doped TiO2 (TP) with different wt% of P (0.5, 1.0, and 1.5) was synthetized by microwave-assisted sol-gel method. The obtained materials were characterized by XRD with cell parameters refinement approach, Raman, BET-specific surface area analysis, SEM, ICP-OES, UV-Vis with diffuse reflectance, photoluminescence, FTIR, and XPS. The photocatalytic activity under visible light was evaluated on the degradation of sulfamethazine (SMTZ) at pH 8. The characterization of the phosphorous materials (TP) showed that incorporation of P in the lattice of TiO2 stabilizes the anatase crystalline phase, even increasing the annealing temperature. The mesoporous P-doped materials showed higher surface area and lower average crystallite size, band gap, and particle size; besides, more intense bands attributed to O-H bond were observed by FTIR analysis compared with bare TiO2. The P was substitutionally incorporated in the TiO2 lattice network as P5+ replacing Ti4+ to form Ti-O-P bonds and additionally present as PO43- on the TiO2 surface. All these characteristics explain the observed superior photocatalytic activity on degradation (100%) and mineralization (32%) of SMTZ under visible radiation by TP catalysts, especially for P-doped TiO2 1.0 wt% calcined at 450 °C (TP1.0-450). Ammonium, nitrate, and sulfate ions released during the photocatalytic degradation were quantified by ion chromatography; the nitrogen and sulfur mass balance evidenced the partial mineralization of this recalcitrant molecule.
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Affiliation(s)
- Sandra Yadira Mendiola-Alvarez
- Facultad de Ciencias Químicas, Cd. Universitaria, Universidad Autónoma de Nuevo León, UANL, C.P. 66455, San Nicolás de los Garza, N. L., México
| | - Ma Aracely Hernández-Ramírez
- Facultad de Ciencias Químicas, Cd. Universitaria, Universidad Autónoma de Nuevo León, UANL, C.P. 66455, San Nicolás de los Garza, N. L., México
| | - Jorge Luis Guzmán-Mar
- Facultad de Ciencias Químicas, Cd. Universitaria, Universidad Autónoma de Nuevo León, UANL, C.P. 66455, San Nicolás de los Garza, N. L., México
| | - Lorena Leticia Garza-Tovar
- Facultad de Ciencias Químicas, Cd. Universitaria, Universidad Autónoma de Nuevo León, UANL, C.P. 66455, San Nicolás de los Garza, N. L., México
| | - Laura Hinojosa-Reyes
- Facultad de Ciencias Químicas, Cd. Universitaria, Universidad Autónoma de Nuevo León, UANL, C.P. 66455, San Nicolás de los Garza, N. L., México.
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Vigil-Castillo HH, Hernández-Ramírez A, Guzmán-Mar JL, Ramos-Delgado NA, Villanueva-Rodríguez M. Performance of Bi 2O 3/TiO 2 prepared by sol-gel on p-Cresol degradation under solar and visible light. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:4215-4223. [PMID: 29781061 DOI: 10.1007/s11356-018-2212-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Accepted: 05/01/2018] [Indexed: 06/08/2023]
Abstract
Photocatalytic degradation of p-Cresol was evaluated using the mixed oxide Bi2O3/TiO2 (containing 2 and 20% wt. Bi2O3 referred as TB2 and TB20) and was compared with bare TiO2 under simulated solar radiation. Materials were prepared by the classic sol-gel method. All solids exhibited the anatase phase by X-ray diffraction (XRD) and Raman spectroscopy. The synthesized materials presented lower crystallite size and Eg value, and also higher surface area as Bi2O3 amount was increased. Bi content was quantified showing near to 70% of theoretical values in TB2 and TB20. Bi2O3 incorporation also was demonstrated by X-ray photoelectron spectroscopy (XPS). Characterization of mixed oxides suggests a homogeneous distribution of Bi2O3 on TiO2 surface. Photocatalytic tests were carried out using a catalyst loading of 1 g L-1 under simulated solar light and visible light. The incorporation of Bi2O3 in TiO2 improved the photocatalytic properties of the synthesized materials obtaining better results with TB20 than the unmodified TiO2 under both radiation sources.
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Affiliation(s)
- Héctor H Vigil-Castillo
- Universidad Autónoma de Nuevo León (UANL), Facultad de Ciencias Químicas, Av. Universidad s/n, Ciudad Universitaria, 66455, San Nicolás de los Garza, Nuevo León, Mexico
| | - Aracely Hernández-Ramírez
- Universidad Autónoma de Nuevo León (UANL), Facultad de Ciencias Químicas, Av. Universidad s/n, Ciudad Universitaria, 66455, San Nicolás de los Garza, Nuevo León, Mexico
| | - Jorge L Guzmán-Mar
- Universidad Autónoma de Nuevo León (UANL), Facultad de Ciencias Químicas, Av. Universidad s/n, Ciudad Universitaria, 66455, San Nicolás de los Garza, Nuevo León, Mexico
| | - Norma A Ramos-Delgado
- CONACyT-Instituto Tecnológico de Nuevo León, Centro de Investigación e Innovación Tecnológica, Av. de la Alianza No. 507, inside park PIIT, 66629, Apodaca, Nuevo León, Mexico
| | - Minerva Villanueva-Rodríguez
- Universidad Autónoma de Nuevo León (UANL), Facultad de Ciencias Químicas, Av. Universidad s/n, Ciudad Universitaria, 66455, San Nicolás de los Garza, Nuevo León, Mexico.
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13
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Mendiola-Alvarez SY, Guzmán-Mar JL, Turnes-Palomino G, Maya-Alejandro F, Caballero-Quintero A, Hernández-Ramírez A, Hinojosa-Reyes L. Synthesis of Cr 3+-doped TiO 2 nanoparticles: characterization and evaluation of their visible photocatalytic performance and stability. ENVIRONMENTAL TECHNOLOGY 2019; 40:144-153. [PMID: 28914168 DOI: 10.1080/09593330.2017.1380715] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2017] [Accepted: 09/09/2017] [Indexed: 06/07/2023]
Abstract
Cr3+-doped TiO2 nanoparticles (Ti-Cr) were synthesized by microwave-assisted sol-gel method. The Ti-Cr catalyst was characterized by X-ray diffraction, ultraviolet-visible diffuse reflectance spectroscopy, N2 adsorption-desorption analysis, Raman spectroscopy, scanning electron microscopy, transmission electron microscopy, photoluminescence spectroscopy, X-ray photoelectron spectroscopy (XPS) and zetametry. The anatase mesoporous Ti-Cr material exhibited a specific surface area of 54.5 m2/g. XPS analysis confirmed the proper substitution of Ti4+ cations by Cr3+ cations in the TiO2 matrix. The particle size was of average size of 17 nm for the undoped TiO2 but only 9.5 nm for Ti-Cr. The Cr atoms promoted the formation of hydroxyl radicals and modified the surface adsorptive properties of TiO2 due to the increase in surface acidity of the material. The photocatalytic evaluation demonstrated that the Ti-Cr catalyst completely degraded (4-chloro-2-methylphenoxy) acetic acid under visible light irradiation, while undoped TiO2 and P25 allowed 45.7% and 31.1%, respectively. The rate of degradation remained 52% after three cycles of catalyst reuse. The higher visible light photocatalytic activity of Ti-Cr was attributed to the beneficial effect of Cr3+ ions on the TiO2 surface creating defects within the TiO2 crystal lattice, which can act as charge-trapping sites, reducing the electron-hole recombination process.
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Affiliation(s)
| | - Jorge Luis Guzmán-Mar
- a Facultad de Ciencias Químicas , Universidad Autónoma de Nuevo León, UANL , San Nicolás de los Garza , México
| | - Gemma Turnes-Palomino
- b Department of Chemistry , University of the Balearic Islands , Palma de Mallorca , Spain
| | | | - Adolfo Caballero-Quintero
- c Laboratorio de Química Forense, Criminalística y Servicios Periciales , Procuraduría General de Justicia del Estado de Nuevo León , Monterrey , México
| | - Aracely Hernández-Ramírez
- a Facultad de Ciencias Químicas , Universidad Autónoma de Nuevo León, UANL , San Nicolás de los Garza , México
| | - Laura Hinojosa-Reyes
- a Facultad de Ciencias Químicas , Universidad Autónoma de Nuevo León, UANL , San Nicolás de los Garza , México
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14
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Ribao P, Rivero MJ, Ortiz I. Enhanced photocatalytic activity using GO/TiO 2 catalyst for the removal of DCA solutions. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:34893-34902. [PMID: 29275483 DOI: 10.1007/s11356-017-0901-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Accepted: 12/01/2017] [Indexed: 06/07/2023]
Abstract
This work aimed to optimize high-performance photocatalysts based on graphene oxide/titanium dioxide (GO/TiO2) nanocomposites for the effective degradation of aqueous pollutants. The catalytic activity was tested against the degradation of dichloroacetic acid (DCA), a by-product of disinfection processes that is present in many industrial wastewaters and effluents. GO/TiO2 photocatalysts were prepared using three different methods, hydrothermal, solvothermal, and mechanical, and varying the GO/TiO2 ratio in the range of 1 to 10%. Several techniques were applied to characterize the catalysts, and better coupling of GO and TiO2 was observed in the thermally synthesized composites. Although the results obtained for DCA degradation showed a coupled influence of the composite preparation method and its composition, promising results were obtained with the photocatalysts compared to the limited activity of conventional TiO2. In the best case, corresponding to the composite synthesized via hydrothermal method with 5% of GO/TiO2 weight ratio, an enhancement of 2.5 times of the photocatalytic degradation yield of DCA was obtained compared to bare TiO2, thus opening more efficient ways to promote the application of photocatalytic remediation technologies.
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Affiliation(s)
- Paula Ribao
- Department of Chemical and Biomolecular Engineering, ETSIIT, University of Cantabria, Santander, Spain
| | - Maria J Rivero
- Department of Chemical and Biomolecular Engineering, ETSIIT, University of Cantabria, Santander, Spain
| | - Inmaculada Ortiz
- Department of Chemical and Biomolecular Engineering, ETSIIT, University of Cantabria, Santander, Spain.
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Morales U, Escudero CJ, Rivero MJ, Ortiz I, Rocha JM, Peralta-Hernández JM. Coupling of the electrochemical oxidation (EO-BDD)/photocatalysis (TiO2-Fe-N) processes for degradation of acid blue BR dye. J Electroanal Chem (Lausanne) 2018. [DOI: 10.1016/j.jelechem.2017.12.014] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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16
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Application of modified magnetic nanoparticles with amine groups as an efficient solid sorbent for simultaneous removal of 2,4-Dichlorophenoxyacetic acid and 2-methyl-4-chlorophenoxyacetic acid from aqueous solution: optimization and modeling. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2017. [DOI: 10.1007/s13738-017-1243-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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