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Zhang Y, Liu Y, Wei Y, Jiang Y, Gao Y, Liu C, Zhao G, Liu R, Wang H, Li X, Liu H, Yu Z, Shi G, Wang G. Preparation of Multistage Pore TS-1 with Enhanced Photocatalytic Activity, Including Process Studies and Artificial Neural Network Modeling for Synergy Assessment. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:19441-19457. [PMID: 39238335 DOI: 10.1021/acs.langmuir.4c01732] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/07/2024]
Abstract
Antibiotic residues have been found in several aquatic ecosystems as a result of the widespread use of antibiotics in recent years, which poses a major risk to both human health and the environment. At present, photocatalytic degradation is the most effective and environmentally friendly method. Titanium silicon molecular sieve (TS-1) has been widely used as an industrial catalyst, but its photocatalytic application in wastewater treatment is limited due to its small pores and few active sites. In this paper, we report a method for preparing multistage porous TS-1 with a high specific surface area by alkali treatment. In the photocatalytic removal of CIP (ciprofloxacin) antibiotic wastewater experiments, the alkali-treated catalyst showed better performance in terms of interfacial charge transfer efficiency, which was 2.3 times higher than that of TS-1 synthesized by the conventional method, and it was found to maintain better catalytic performance in the actual water source. In addition, this research studied the effects of solution pH, contaminant concentration, and catalyst dosage on CIP degradation, while liquid chromatography-mass spectrometry (LC-MS) was used to identify intermediates in the degradation process and infer possible degradation pathways and the toxicity of CIP, and its degradation product was also analyzed using ECOSAR 2.2 software, and most of the intermediates were found to be nontoxic and nonharmful. Finally, a 3:5:1 artificial neural network model was established based on the experiments, and the relative importance of the influence of experimental conditions on the degradation rate was determined. The above results confirmed the feasibility and applicability of photocatalytic treatment of wastewater containing antibiotics using visible light excitation alkali post-treatment TS-1, which provided technical support and a theoretical basis for the photocatalytic treatment of wastewater containing antibiotics.
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Affiliation(s)
- Yulan Zhang
- Key Laboratory of Low Carbon Energy and Chemical Engineering of Gansu Province, College of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China
| | - Yubing Liu
- Key Laboratory of Low Carbon Energy and Chemical Engineering of Gansu Province, College of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China
| | - Yuan Wei
- Key Laboratory of Low Carbon Energy and Chemical Engineering of Gansu Province, College of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China
| | - Yanyan Jiang
- Key Laboratory of Low Carbon Energy and Chemical Engineering of Gansu Province, College of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China
| | - Yuhui Gao
- Key Laboratory of Low Carbon Energy and Chemical Engineering of Gansu Province, College of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China
| | - Chao Liu
- Key Laboratory of Low Carbon Energy and Chemical Engineering of Gansu Province, College of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China
| | - Guanghong Zhao
- Key Laboratory of Low Carbon Energy and Chemical Engineering of Gansu Province, College of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China
| | - Ronghui Liu
- Key Laboratory of Low Carbon Energy and Chemical Engineering of Gansu Province, College of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China
| | - Hongyu Wang
- Key Laboratory of Low Carbon Energy and Chemical Engineering of Gansu Province, College of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China
| | - Xin Li
- Key Laboratory of Low Carbon Energy and Chemical Engineering of Gansu Province, College of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China
| | - Huaide Liu
- Key Laboratory of Low Carbon Energy and Chemical Engineering of Gansu Province, College of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China
| | - Ziyan Yu
- Key Laboratory of Low Carbon Energy and Chemical Engineering of Gansu Province, College of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China
| | - Gaofeng Shi
- Key Laboratory of Low Carbon Energy and Chemical Engineering of Gansu Province, College of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China
| | - Guoying Wang
- Key Laboratory of Low Carbon Energy and Chemical Engineering of Gansu Province, College of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China
- Hexi University, Zhangye 734000, Gansu, China
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Guo Y, Li J, Xu Q, Song Z, Wang J, Han M, Chen L, Han N, Cheng W. TS-1@MCM-48 Core-Shell Catalysts for Efficient Oxidation of p-Diethylbenzene to High Value-Added Derivatives. Chemistry 2024; 30:e202303739. [PMID: 38287793 DOI: 10.1002/chem.202303739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Revised: 12/25/2023] [Accepted: 01/29/2024] [Indexed: 01/31/2024]
Abstract
To expand the market capacity of p-diethylbenzene (PDEB), core-shell zeolite (TS-1@MCM-48) is designed as a catalyst for PDEB oxidation. TS-1@MCM-48 catalyst is synthesized by in-situ crystallization method and characterized by X-ray diffraction (XRD), transmission electron microscope (TEM), scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS), N2 adsorption-desorption, in-situ electron paramagnetic resonance (EPR) and 29Si nuclear magnetic resonance (29Si MAS-NMR). Oxidation of PDEB by H2O2 was investigated systematically in liquid phase. The conversion of PDEB over TS-1@MCM-48 was 28.1 % and the total selectivity was 72.6 %, where the selectivity of EAP (p-ethylacetophenone) and EPEA (4-ethyl-α-methylbenzyl alcohol) was 28.6 % and 44.0 %, respectively. Compared with TS-1 and MCM-48 zeolite, the conversion rate of reactants and the selectivity of products have been significantly improved. The catalytic performance of TS-1@MCM-48 is derived from its well-crystallized microporous core and mesoporous shell with regular channels, which make active sites of TS-1 zeolite in the catalyst be fully utilized and mass transfer resistance be largely reduced. Further through theoretical calculation, we propose that the oxidation of PDEB is the result of the combination and mutual transformation of free radical process and carbocation process. Core-shell structure ensures the conversion rate of raw materials and improves the selectivity of products.
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Affiliation(s)
- Ying Guo
- Faculty of Chemistry and Chemical Engineering, Liaoning Normal University, 110629, Dalian, Liaoning, PR China
| | - Jinhong Li
- Faculty of Chemistry and Chemical Engineering, Liaoning Normal University, 110629, Dalian, Liaoning, PR China
| | - Qingxin Xu
- Faculty of Chemistry and Chemical Engineering, Liaoning Normal University, 110629, Dalian, Liaoning, PR China
| | - Zhimei Song
- Faculty of Chemistry and Chemical Engineering, Liaoning Normal University, 110629, Dalian, Liaoning, PR China
| | - Jinge Wang
- Faculty of Chemistry and Chemical Engineering, Liaoning Normal University, 110629, Dalian, Liaoning, PR China
| | - Mei Han
- Faculty of Chemistry and Chemical Engineering, Liaoning Normal University, 110629, Dalian, Liaoning, PR China
| | - Lidong Chen
- Faculty of Chemistry and Chemical Engineering, Liaoning Normal University, 110629, Dalian, Liaoning, PR China
| | - Na Han
- Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, 215123, Suzhou, PR China
| | - Weiguo Cheng
- Beijing Key Laboratory of Ionic Liquids Clean Process, Chinese Academy of Sciences, Institute of Process Engineering, 100190, Beijing, PR China
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3
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Abstract
Zeolites with ordered microporous systems, distinct framework topologies, good spatial nanoconfinement effects, and superior (hydro)thermal stability are an ideal scaffold for planting diverse active metal species, including single sites, clusters, and nanoparticles in the framework and framework-associated sites and extra-framework positions, thus affording the metal-in-zeolite catalysts outstanding activity, unique shape selectivity, and enhanced stability and recyclability in the processes of Brønsted acid-, Lewis acid-, and extra-framework metal-catalyzed reactions. Especially, thanks to the advances in zeolite synthesis and characterization techniques in recent years, zeolite-confined extra-framework metal catalysts (denoted as metal@zeolite composites) have experienced rapid development in heterogeneous catalysis, owing to the combination of the merits of both active metal sites and zeolite intrinsic properties. In this review, we will present the recent developments of synthesis strategies for incorporating and tailoring of active metal sites in zeolites and advanced characterization techniques for identification of the location, distribution, and coordination environment of metal species in zeolites. Furthermore, the catalytic applications of metal-in-zeolite catalysts are demonstrated, with an emphasis on the metal@zeolite composites in hydrogenation, dehydrogenation, and oxidation reactions. Finally, we point out the current challenges and future perspectives on precise synthesis, atomic level identification, and practical application of the metal-in-zeolite catalyst system.
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Affiliation(s)
- Qiang Zhang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China.,International Center of Future Science, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China
| | - Shiqin Gao
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China.,International Center of Future Science, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China
| | - Jihong Yu
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China.,International Center of Future Science, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China
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Song Y, Zhang T, Bai R, Zhou Y, Li L, Zou Y, Yu J. Catalytically active Rh species stabilized by zirconium and hafnium on zeolites. Inorg Chem Front 2022. [DOI: 10.1039/d2qi00280a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Supported subnanometric metal species and metal nanoparticles, prepared through the impregnation method, are widely used in industrial catalysis, but suffering from the poor stability of the metal species to sintering...
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