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Zhang X, Gao B, Rao R, Bi F, Li C, Yue K, Wang Y, Xu J, Feng X, Yang Y. Defects materials of Institut Lavoisier-125(Ti) materials enhanced photocatalytic activity for toluene and chlorobenzene mixtures degradation: Mechanism study. J Colloid Interface Sci 2024; 660:423-439. [PMID: 38244508 DOI: 10.1016/j.jcis.2024.01.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Revised: 12/14/2023] [Accepted: 01/02/2024] [Indexed: 01/22/2024]
Abstract
In this paper, the effect of three monocarboxylic acids on MIL-125 synthesis was systematically investigated and the results were discussed in detail. X-ray diffractometry (XRD) and nitrogen adsorption-desorption curves indicated that small molecule acids (acetic acid, propionic acid and butyric acid) affected the morphology of MIL-125 and induced lamellar pores and structural defects in the crystals. Thermogravimetric measurements confirmed the presence of acid-regulated defective metal-organic frameworks (MOFs). Electrochemical tests and density function theory calculations indicated that acid modulation could change the forbidden bandwidth of the material. The acid modification strategy effectively promoted the transfer of photogenerated electrons and enhanced the adsorption and activation of O2 and H2O molecules, generating reactive radicals. The modified MOFs also showed excellent performance in the removal of mixed toluene and chlorobenzene. The degradation pathways of the mixture were analyzed by in situ infrared (IR) and gas chromatography-mass spectrometry (GC-MS). The mixture was converted to chlorophenolic intermediates in the presence of reactive oxygen species, further decomposed to form ethers and ethanol, and finally formed small molecules such as carbon dioxide and water. A feasible method was provided for the preparation of photocatalysts for the treatment of mixed VOCs.
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Affiliation(s)
- Xiaodong Zhang
- School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China; Shanghai Non-carbon Energy Conversion and Utilization Institute, Shanghai 200240, China.
| | - Bin Gao
- School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Renzhi Rao
- School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Fukun Bi
- School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Chenyu Li
- School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Ke Yue
- School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Yuxin Wang
- Institute of Applied Biotechnology, Taizhou Vocation & Technical College, Taizhou, Zhejiang 318000, China
| | - Jingcheng Xu
- School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Xiangbo Feng
- Xi'an Key Laboratory of Advanced Photo-electronics Materials and Energy Conversion Device, School of Electronic Information, Xijing University, Xi'an 710123, Shaanxi, China.
| | - Yiqiong Yang
- School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China.
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Smaiyl M, Tulebekov Y, Nurpeisov N, Satybaldiyev B, Snow DD, Uralbekov B. Human Health Risk Assessment of the Photocatalytic Oxidation of BTEX over TiO 2/Volcanic Glass. Molecules 2023; 28:8119. [PMID: 38138607 PMCID: PMC10745685 DOI: 10.3390/molecules28248119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Revised: 12/01/2023] [Accepted: 12/11/2023] [Indexed: 12/24/2023] Open
Abstract
This study demonstrates rapid photocatalytic oxidation of a benzene, toluene, ethylbenzene, and xylene (BTEX) mixture over TiO2/volcanic glass. The assessment of the photocatalytic oxidation of BTEX was conducted under conditions simulating those found in indoor environments affected by aromatic hydrocarbon release. We show, under UV-A intensities of 15 mW/cm2 and an air flow rate of 55 m3/h, that low ppmv levels of BTEX concentrations can be reduced to below detectable levels. Solid-phase microextraction technique was employed to monitor the levels of BTEX in the test chamber throughout the photocatalytic oxidation, lasting approximately 21 h. Destruction of BTEX from the gas phase was observed in the following sequence: o-xylene, ethylbenzene, toluene, and benzene. This study identified sequential degradation of BTEX, in combination with the stringent regulatory level set for benzene, resulted in the air quality hazard indexes (Total Hazard Index and Hazard Quotient) remaining relatively high during the process of photocatalytic oxidation. In the practical application of photocatalytic purification, it is crucial to account for the slower oxidation kinetics of benzene. This is of particular importance due to not only its extremely low exposure limits, but also due to the classification of benzene as a Group 1 carcinogenic compound by the International Agency for Research on Cancer (IARC). Our study underscores the importance of taking regulatory considerations into account when using photocatalytic purification technology.
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Affiliation(s)
- Madi Smaiyl
- Center of Physical-Chemical Methods of Research and Analysis, Al-Farabi Kazakh National University, Almaty 050012, Kazakhstan; (M.S.); (Y.T.); (N.N.); (B.S.)
| | - Yerzhigit Tulebekov
- Center of Physical-Chemical Methods of Research and Analysis, Al-Farabi Kazakh National University, Almaty 050012, Kazakhstan; (M.S.); (Y.T.); (N.N.); (B.S.)
| | - Nurbek Nurpeisov
- Center of Physical-Chemical Methods of Research and Analysis, Al-Farabi Kazakh National University, Almaty 050012, Kazakhstan; (M.S.); (Y.T.); (N.N.); (B.S.)
- LLP «EcoRadSM», Almaty 050000, Kazakhstan
| | - Bagdat Satybaldiyev
- Center of Physical-Chemical Methods of Research and Analysis, Al-Farabi Kazakh National University, Almaty 050012, Kazakhstan; (M.S.); (Y.T.); (N.N.); (B.S.)
- LLP «EcoRadSM», Almaty 050000, Kazakhstan
| | - Daniel D. Snow
- Water Sciences Laboratory, Nebraska Water Center, Part of the Daugherty Water for Food Global Institute, University of Nebraska, Lincoln, NE 68583, USA;
| | - Bolat Uralbekov
- Center of Physical-Chemical Methods of Research and Analysis, Al-Farabi Kazakh National University, Almaty 050012, Kazakhstan; (M.S.); (Y.T.); (N.N.); (B.S.)
- LLP «EcoRadSM», Almaty 050000, Kazakhstan
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Ma Q, Li Y, Tan Y, Xu B, Cai J, Zhang Y, Wang Q, Wu Q, Yang B, Huang J. Recent Advances in Metal-Organic Framework (MOF)-Based Photocatalysts: Design Strategies and Applications in Heavy Metal Control. Molecules 2023; 28:6681. [PMID: 37764456 PMCID: PMC10535165 DOI: 10.3390/molecules28186681] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Revised: 09/09/2023] [Accepted: 09/14/2023] [Indexed: 09/29/2023] Open
Abstract
The heavy metal contamination of water systems has become a major environmental concern worldwide. Photocatalysis using metal-organic frameworks (MOFs) has emerged as a promising approach for heavy metal remediation, owing to the ability of MOFs to fully degrade contaminants through redox reactions that are driven by photogenerated charge carriers. This review provides a comprehensive analysis of recent developments in MOF-based photocatalysts for removing and decontaminating heavy metals from water. The tunable nature of MOFs allows the rational design of composition and features to enhance light harvesting, charge separation, pollutant absorptivity, and photocatalytic activities. Key strategies employed include metal coordination tuning, organic ligand functionalization, heteroatom doping, plasmonic nanoparticle incorporation, defect engineering, and morphology control. The mechanisms involved in the interactions between MOF photocatalysts and heavy metal contaminants are discussed, including light absorption, charge carrier separation, metal ion adsorption, and photocatalytic redox reactions. The review highlights diverse applications of MOF photocatalysts in treating heavy metals such as lead, mercury, chromium, cadmium, silver, arsenic, nickel, etc. in water remediation. Kinetic modeling provides vital insights into the complex interplay between coupled processes such as adsorption and photocatalytic degradation that influence treatment efficiency. Life cycle assessment (LCA) is also crucial for evaluating the sustainability of MOF-based technologies. By elucidating the latest advances, current challenges, and future opportunities, this review provides insights into the potential of MOF-based photocatalysts as a sustainable technology for addressing the critical issue of heavy metal pollution in water systems. Ongoing efforts are needed to address the issues of stability, recyclability, scalable synthesis, and practical reactor engineering.
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Affiliation(s)
- Qiang Ma
- Key Laboratory of Drinking Water Source Protection in Chengdu Basin of Sichuan Province, Sichuan Provincial Engineering Research Center of City Solid Waste Energy and Building Materials Conversion & Utilization Technology, Chengdu University, Chengdu 610106, China; (Q.M.); (Y.L.); (Y.T.); (Q.W.); (Q.W.)
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Yunling Li
- Key Laboratory of Drinking Water Source Protection in Chengdu Basin of Sichuan Province, Sichuan Provincial Engineering Research Center of City Solid Waste Energy and Building Materials Conversion & Utilization Technology, Chengdu University, Chengdu 610106, China; (Q.M.); (Y.L.); (Y.T.); (Q.W.); (Q.W.)
| | - Yawen Tan
- Key Laboratory of Drinking Water Source Protection in Chengdu Basin of Sichuan Province, Sichuan Provincial Engineering Research Center of City Solid Waste Energy and Building Materials Conversion & Utilization Technology, Chengdu University, Chengdu 610106, China; (Q.M.); (Y.L.); (Y.T.); (Q.W.); (Q.W.)
| | - Bowen Xu
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China;
| | - Jun Cai
- National Joint Engineering Research Center of Energy Saving and Environmental Protection Technology in Metallurgy and Chemical Engineering Industry, Kunming University of Science and Technology, Kunming 650093, China;
| | - Yingjie Zhang
- College of Agriculture and Biological Science, Dali University, Dali 671000, China;
| | - Qingyuan Wang
- Key Laboratory of Drinking Water Source Protection in Chengdu Basin of Sichuan Province, Sichuan Provincial Engineering Research Center of City Solid Waste Energy and Building Materials Conversion & Utilization Technology, Chengdu University, Chengdu 610106, China; (Q.M.); (Y.L.); (Y.T.); (Q.W.); (Q.W.)
| | - Qihong Wu
- Key Laboratory of Drinking Water Source Protection in Chengdu Basin of Sichuan Province, Sichuan Provincial Engineering Research Center of City Solid Waste Energy and Building Materials Conversion & Utilization Technology, Chengdu University, Chengdu 610106, China; (Q.M.); (Y.L.); (Y.T.); (Q.W.); (Q.W.)
| | - Bowen Yang
- Key Laboratory of Drinking Water Source Protection in Chengdu Basin of Sichuan Province, Sichuan Provincial Engineering Research Center of City Solid Waste Energy and Building Materials Conversion & Utilization Technology, Chengdu University, Chengdu 610106, China; (Q.M.); (Y.L.); (Y.T.); (Q.W.); (Q.W.)
| | - Jin Huang
- Key Laboratory of Drinking Water Source Protection in Chengdu Basin of Sichuan Province, Sichuan Provincial Engineering Research Center of City Solid Waste Energy and Building Materials Conversion & Utilization Technology, Chengdu University, Chengdu 610106, China; (Q.M.); (Y.L.); (Y.T.); (Q.W.); (Q.W.)
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