1
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Zheng Z, Zhang C, Li J, Fang D, Tan P, Fang Q, Chen G. Insight into the effect of exposed crystal facets of anatase TiO 2 on HCHO catalytic oxidation of Mn-Ce/TiO 2. JOURNAL OF HAZARDOUS MATERIALS 2024; 474:134710. [PMID: 38820758 DOI: 10.1016/j.jhazmat.2024.134710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2024] [Revised: 05/13/2024] [Accepted: 05/22/2024] [Indexed: 06/02/2024]
Abstract
Indoor formaldehyde pollution seriously jeopardizes human health. The development of efficient and stable non-precious metal catalysts for low-temperature catalytic degradation of formaldehyde is a promising approach. In this study, TiO2 {001} and {101} supports were loaded with different ratios of Mn and Ce active components, and the effects of the ratios of the active components on the catalytic activity were investigated. The elemental oxidation states, redox capacities, active oxygen mobilities and acid site distributions of the catalysts were determined using characterization techniques such as XPS, H2-TPR, O2-TPD, and NH3-TPD. In situ infrared spectroscopy was utilized to reveal the differences in the two-step dehydrogenation reactions of dioxymethylene (DOM) in 5Mn1Ce/Ti-NS and 5Mn1Ce/Ti-NP. Density-functional theory was used to investigate the differences in the catalytic steps and maximum energy barriers of Mn-Ce/Ti-NS and Mn-Ce/Ti-NP for HCHO. The differences in catalytic activity due to the influence of the manganese and cerium active components on the {001} and {101} crystal faces of anatase titanium dioxide are comprehensively revealed. Exposure of the supported crystalline surfaces alters the catalytic activity centers and reaction pathways at the molecular level. This study provides experimental and theoretical guidance for the selection of exposed crystalline surfaces for loaded catalysts.
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Affiliation(s)
- Zhao Zheng
- State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Luoyu Road 1037, Wuhan 430074, China
| | - Cheng Zhang
- State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Luoyu Road 1037, Wuhan 430074, China.
| | - Junchen Li
- State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Luoyu Road 1037, Wuhan 430074, China
| | - Dingli Fang
- State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Luoyu Road 1037, Wuhan 430074, China
| | - Peng Tan
- State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Luoyu Road 1037, Wuhan 430074, China
| | - Qingyan Fang
- State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Luoyu Road 1037, Wuhan 430074, China
| | - Gang Chen
- State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Luoyu Road 1037, Wuhan 430074, China
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2
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Zheng Z, Zhang C, Li J, Fang D, Tan P, Fang Q, Chen G. Efficient catalytic oxidation of formaldehyde by defective g-C 3N 4-anchored single-atom Pt: A DFT study. CHEMOSPHERE 2024; 361:142517. [PMID: 38830464 DOI: 10.1016/j.chemosphere.2024.142517] [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: 01/30/2024] [Revised: 05/05/2024] [Accepted: 05/31/2024] [Indexed: 06/05/2024]
Abstract
Indoor volatile formaldehyde is a serious health hazard. The development of low-temperature and efficient nonhomogeneous oxidation catalysts is crucial for protecting human health and the environment but is also quite challenging. Single-atom catalysts (SACs) with active centers and coordination environments that are precisely tunable at the atomic level exhibit excellent catalytic activity in many catalytic fields. Among two-dimensional materials, the nonmagnetic monolayer material g-C3N4 may be a good platform for loading single atoms. In this study, the effect of nitrogen defect formation on the charge distribution of g-C3N4 is discussed in detail using density functional theory (DFT) calculations. The effect of nitrogen defects on the activated molecular oxygen of Pt/C3N4 was systematically revealed by DFT calculations in combination with molecular orbital theory. Two typical reaction mechanisms for the catalytic oxidation of formaldehyde were proposed based on the Eley-Rideal (E-R) mechanism. Pt/C3N4-V3N was more advantageous for path 1, as determined by the activation energy barrier of the rate-determining step and product desorption. Finally, the active centers and chemical structures of Pt/C3N4 and Pt/C3N4-V3N were verified to have good stability at 375 K by determination of the migration energy barriers and ab initio molecular dynamics simulations. Therefore, the formation of N defects can effectively anchor single-atom Pt and provide additional active sites, which in turn activate molecular oxygen to efficiently catalyze the oxidation of formaldehyde. This study provides a better understanding of the mechanism of formaldehyde oxidation by single-atom Pt catalysts and a new idea for the development of Pt as well as other metal-based single-atom oxidation catalysts.
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Affiliation(s)
- Zhao Zheng
- State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Luoyu Road 1037, Wuhan, 430074, China
| | - Cheng Zhang
- State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Luoyu Road 1037, Wuhan, 430074, China.
| | - Junchen Li
- State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Luoyu Road 1037, Wuhan, 430074, China
| | - Dingli Fang
- State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Luoyu Road 1037, Wuhan, 430074, China
| | - Peng Tan
- State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Luoyu Road 1037, Wuhan, 430074, China
| | - Qingyan Fang
- State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Luoyu Road 1037, Wuhan, 430074, China
| | - Gang Chen
- State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Luoyu Road 1037, Wuhan, 430074, China
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3
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Chen L, Li K, Xue T, Yang Y, Gong Z, Dong F. Efficient and Durable Oxidation Removal of Formaldehyde over Layered Double Hydroxide Catalysts at Room Temperature. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024; 58:10378-10387. [PMID: 38805367 DOI: 10.1021/acs.est.4c01606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2024]
Abstract
Room temperature catalytic oxidation (RTCO) using non-noble metals has emerged as a highly promising technique for removal of formaldehyde (HCHO) under ambient conditions; however, non-noble catalysts still face the challenges related to poor water resistance and low stability under harsh conditions. In this study, we synthesized a series of layered double hydroxides (LDHs) incorporating various dual metals (MgAl, ZnAl, NiAl, NiFe, and NiTi) for formaldehyde oxidation at ambient temperature. Among the synthesized catalysts, the NiTi-LDH catalyst showed an HCHO removal efficiency and CO2 yield close to 100.0%, and exceptional water resistance and chemical stability on running 1300 min. The abundant hydroxyl groups in LDHs directly bonded with HCHO, leading to the production of CO2 and H2O, thus inhibiting the formation of CO, even in the absence of O2 and H2O. The coexistence of O2 effectively reduced the reaction barrier for H2O molecule dissociation, facilitating the formation of hydroxyl groups and their subsequent backfill on the catalyst surface. The mechanisms underlying the involvement and regeneration of hydroxyl groups in room temperature oxidation of formaldehyde were elucidated with the combined in situ DRIFTS, HCHO-TPD-MS, and DFT calculations. This work not only demonstrates the potential of LDH catalysts in environmental applications but also advances the understanding of the fundamental processes involved in room temperature oxidation of formaldehyde.
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Affiliation(s)
- Lvcun Chen
- Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou 313001, China
- School of Environmental Science and Engineering, Southwest Jiaotong University, Chengdu 611756, China
| | - Kanglu Li
- School of Environmental Science and Engineering, Southwest Jiaotong University, Chengdu 611756, China
| | - Ting Xue
- Research Center for Carbon-Neutral Environmental & Energy Technology, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China
| | - Yan Yang
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China
- Synergy Innovation Institute of GDUT, Shantou, Guangdong 515041, China
| | - Zhengjun Gong
- School of Environmental Science and Engineering, Southwest Jiaotong University, Chengdu 611756, China
| | - Fan Dong
- Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou 313001, China
- Research Center for Carbon-Neutral Environmental & Energy Technology, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China
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4
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Li Y, Han D, Wang Z, Gu F. Double-Solvent-Induced Derivatization of Bi-MOF to Vacancy-Rich Bi 4O 5Br 2: Toward Efficient Photocatalytic Degradation of Ciprofloxacin in Water and HCHO Gas. ACS APPLIED MATERIALS & INTERFACES 2024; 16:7080-7096. [PMID: 38293772 DOI: 10.1021/acsami.3c15898] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2024]
Abstract
MOF-derived photocatalytic materials have potential in degrading ciprofloxacin (CIP) in water and HCHO gas pollutants. Novel derivatization means and defect regulation are effective techniques for improving the performance of MOF-derived photocatalysis. Vacancy-rich Bi4O5Br2 (MBO-x) were derived in one step from Bi-MOF (CAU-17) by a modified double-solvent method. MBO-50 produced more oxygen vacancies due to the combined effect of the CAU-17 precursor and double solvents. The photocatalytic performance of MBO was evaluated by degrading CIP and HCHO. Thanks to the favorable morphology and vacancy structure, MBO-50 demonstrated the best photocatalytic efficiency, with 97.0% removal of CIP (20 mg L-1) and 90.1% removal of HCHO (6.5 ppm) at 60 min of light irradiation. The EIS Nyquist measurement, transient photocurrent response, photoluminescence spectra, and the calculation of energy band information indicated that the vacancy sites can effectively capture photoexcited electrons during the charge transfer process, thus limiting the recombination of electrons and holes, improving the energy band structure, and making it easier to produce superoxide anion radical (·O2-) and to degrade CIP and HCHO. The improvement of photocatalytic performance of MBO-50 in HCHO degradation due to the bromine vacancy generation and filling mechanism was discussed in detail. This work provides a promising new idea for the modulation of MOF-derived photocatalytic materials.
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Affiliation(s)
- Yansheng Li
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Dongmei Han
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Zhihua Wang
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Fubo Gu
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
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5
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Wu X, Sun S, Wang R, Huang Z, Shen H, Zhao H, Jing G. Pt single atoms and defect engineering of TiO 2-nanosheet-assembled hierarchical spheres for efficient room-temperature HCHO oxidation. JOURNAL OF HAZARDOUS MATERIALS 2023; 454:131434. [PMID: 37146337 DOI: 10.1016/j.jhazmat.2023.131434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2023] [Revised: 04/05/2023] [Accepted: 04/15/2023] [Indexed: 05/07/2023]
Abstract
Achieving high atomic utilization and low cost of desirable Pt/TiO2 catalysts is a major challenge for room temperature HCHO oxidation. Here, the strategy of anchoring stable Pt single atoms by abundant oxygen vacancies over TiO2-nanosheet-assembled hierarchical spheres (Pt1/TiO2-HS) was designed to eliminate HCHO. A superior HCHO oxidation activity and CO2 yield (∼100% CO2 yield) at relative humidity (RH) > 50% over Pt1/TiO2-HS is achieved for long-term run. We attribute the excellent HCHO oxidation performance to the stable isolated Pt single atoms anchored on the defective TiO2-HS surface. The Ptδ+ on the Pt1/TiO2-HS surface has a facile intense electron transfer with the support by forming Pt-O-Ti linkages, driving HCHO oxidation effectively. Further in situ HCHO-DRIFTS revealed that the dioxymethylene (DOM) and HCOOH/HCOO- intermediates were further degraded via active OH- and adsorbed oxygen on the Pt1/TiO2-HS surface, respectively. This work may pave the way for the next generation of advanced catalytic materials for high-efficiency catalytic HCHO oxidation at room temperature.
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Affiliation(s)
- Xiaomin Wu
- Department of Environmental Science & Engineering, College of Chemical Engineering, Huaqiao University, Xiamen, Fujian 361021, PR China
| | - Shaodi Sun
- Department of Environmental Science & Engineering, College of Chemical Engineering, Huaqiao University, Xiamen, Fujian 361021, PR China
| | - Ruichen Wang
- Department of Environmental Science & Engineering, College of Chemical Engineering, Huaqiao University, Xiamen, Fujian 361021, PR China
| | - Zhiwei Huang
- Department of Environmental Science & Engineering, College of Chemical Engineering, Huaqiao University, Xiamen, Fujian 361021, PR China
| | - Huazheng Shen
- Department of Environmental Science & Engineering, College of Chemical Engineering, Huaqiao University, Xiamen, Fujian 361021, PR China
| | - Huawang Zhao
- Department of Environmental Science & Engineering, College of Chemical Engineering, Huaqiao University, Xiamen, Fujian 361021, PR China
| | - Guohua Jing
- Department of Environmental Science & Engineering, College of Chemical Engineering, Huaqiao University, Xiamen, Fujian 361021, PR China.
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6
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Qin L, Huang S, Cheng H. Catalytic performance and mechanism of bismuth molybdate nanosheets decorated with platinum nanoparticles for formaldehyde decomposition at room temperature. J Colloid Interface Sci 2023; 633:453-467. [PMID: 36462268 DOI: 10.1016/j.jcis.2022.11.110] [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: 09/21/2022] [Revised: 11/14/2022] [Accepted: 11/21/2022] [Indexed: 11/26/2022]
Abstract
Catalytic oxidation at room temperature is considered as a promising strategy for removal of formaldehyde (HCHO), a widely occurring indoor air pollutant. A series of Bi2MoO6 nanosheets were prepared via one-step hydrothermal synthesis in this study, followed by decoration with Pt nanoparticles (NPs). The catalyst with Bi2MoO6 support prepared at 180 °C exhibited high and stable activity in catalytic oxidation of HCHO at room temperature. The excellent catalytic performance was attributed to its large specific area and pore volume, high level of surface active oxygen species, high content of metallic Pt NPs, and abundant oxygen vacancies. The good synergy and interaction between Pt and Bi2MoO6 promoted electron transfer, and facilitated the adsorption and oxidation of HCHO. The electronic interaction between Pt NPs and Bi2MoO6 accelerated the activation of oxygen species due to weakening of the surface BiO or MoO bonds adjacent to Pt NPs. Infrared spectra indicated that dioxymethylene and formate species were the main intermediates of HCHO oxidation. Density functional theory calculations showed that the dehydrogenation of HCO2, with an energy barrier of 282.1 kJ/mol, was the rate-determining step in catalytic oxidation process. This study provides new insights on the construction of high-efficiency catalysts for indoor formaldehyde removal.
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Affiliation(s)
- Lifan Qin
- MOE Key Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China
| | - Shengnan Huang
- MOE Key Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China
| | - Hefa Cheng
- MOE Key Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China.
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7
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Ren Z, Chen B, Li Y, Carabineiro SA, Duan Y, Dong F. Remarkable formaldehyde photo-oxidation efficiency of Zn2SnO4 co-modified by Mo doping and oxygen vacancies. Sep Purif Technol 2023. [DOI: 10.1016/j.seppur.2023.123202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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8
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Jang Y, Lee YH, Eom H, Lee SM, Kim SS. Effect of preparation method of noble metal supported catalyts on formaldehyde oxidation at room temperature: Gas or liquid phase reduction. J Environ Sci (China) 2022; 122:201-216. [PMID: 35717085 DOI: 10.1016/j.jes.2022.01.027] [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: 06/11/2021] [Revised: 01/12/2022] [Accepted: 01/17/2022] [Indexed: 06/15/2023]
Abstract
Formaldehyde (HCHO) is toxic to the human body and is one of the main threats to the indoor air quality (IAQ). As such, the removal of HCHO is imperative to improving the IAQ, whereby the most useful method to effectively remove HCHO at room temperature is catalytic oxidation. This review discusses catalysts for HCHO room-temperature oxidation, which are categorized according to their preparation methods, i.e., gas-phase reduction and liquid-phase reduction methods. The HCHO oxidation performances, structural features, and reaction mechanisms of the different catalysts are discussed, and directions for future research on catalytic oxidation are reviewed.
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Affiliation(s)
- Younghee Jang
- Department of Environmental Energy Envineering, Graduate School of kyonggi University, Gyeonggi-do 16227, Korea
| | - Ye Hwan Lee
- Department of Environmental Energy Envineering, Graduate School of kyonggi University, Gyeonggi-do 16227, Korea
| | - Hanki Eom
- Department of Environmental Energy Engineeing, Kyonggi University, Gyonggi-do 16227, Korea
| | - Sang Moon Lee
- Department of Environmental Energy Engineeing, Kyonggi University, Gyonggi-do 16227, Korea
| | - Sung Su Kim
- Department of Environmental Energy Engineeing, Kyonggi University, Gyonggi-do 16227, Korea.
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9
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Wang X, Jiang T, Chen J, Zhang J, Mai Y. Hydroxy‐Modified Hierarchical Porous Na‐CoOx/CN Material for Low‐Concentration High‐Throughput Formaldehyde Oxidation at Room Temperature. Chempluschem 2022; 87:e202200218. [DOI: 10.1002/cplu.202200218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Revised: 08/02/2022] [Indexed: 11/11/2022]
Affiliation(s)
- Xi Wang
- Guangdong Academy of Sciences Guangdong Provincial Key Laboratory of Industrial Surfactant, Institute of Chemical Engineering 318 Che Bei Xi Road, Tianhe, Guangzhou 510665 Guangzhou CHINA
| | - Tingting Jiang
- Guangdong Academy of Sciences Guangdong Provincial Key Laboratory of Industrial Surfactant, Institute of Chemical Engineering CHINA
| | - Jiazhi Chen
- Guangdong Academy of Sciences Guangdong Provincial Key Laboratory of Industrial Surfactant, Institute of Chemical Engineering CHINA
| | - Junjie Zhang
- Guangdong Academy of Sciences Guangdong Provincial Key Laboratory of Industrial Surfactant, Institute of Chemical Engineering CHINA
| | - Yuliang Mai
- Guangdong Academy of Sciences Guangdong Provincial Key Laboratory of Industrial Surfactant, Institute of Chemical Engineering CHINA
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10
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Wei T, Zhao X, Li L, Wang L, Lv S, Gao L, Yuan G, Li L. Enhanced Formaldehyde Oxidation Performance of the Mesoporous TiO 2(B)-Supported Pt Catalyst: The Role of Hydroxyls. ACS OMEGA 2022; 7:25491-25501. [PMID: 35910119 PMCID: PMC9330097 DOI: 10.1021/acsomega.2c02490] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Accepted: 07/04/2022] [Indexed: 06/15/2023]
Abstract
As one of the crystal phases of titania, TiO2(B) was first utilized as a catalyst carrier for the oxidation of formaldehyde (HCHO). The mesoporous TiO2(B) loaded with Pt nanoparticles enhanced the HCHO oxidation reaction whose reaction rate was 4.5-8.4 times those of other crystalline TiO2-supported Pt catalysts. Simultaneously, Pt/TiO2(B) exhibited long-term stable HCHO oxidation performance. The structural characterization results showed that in comparison with Pt/anatase, Pt/TiO2(B) had more abundant hydroxyls, facilitating increasing the content of oxygen species. Studies on the role of hydroxyls in HCHO oxidation of Pt/TiO2(B) illustrated that synergistic involvement of terminally bound hydroxyls and bridging hydroxyls in HCHO oxidation accelerated the transformation from HCHO to formate via dioxymethylene. Moreover, hydroxyls could avoid the accumulation of excessive formate on Pt/TiO2(B) and promote the rapid oxidation of CO. Accordingly, the hydroxyl groups could accelerate each substep of formaldehyde oxidation, which enabled Pt/TiO2(B) to exhibit excellent formaldehyde oxidation performance.
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Affiliation(s)
- Tongtong Wei
- Jiangsu
Co-Innovation Center of Efficient Processing and Utilization of Forest
Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, P. R. China
| | - Xuejuan Zhao
- School
of Materials Science and Engineering, Nanjing
Institute of Technology, Nanjing 211167, P. R. China
| | - Long Li
- Jiangsu
Co-Innovation Center of Efficient Processing and Utilization of Forest
Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, P. R. China
| | - Lei Wang
- Jiangsu
Co-Innovation Center of Efficient Processing and Utilization of Forest
Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, P. R. China
| | - Shenjie Lv
- Jiangsu
Co-Innovation Center of Efficient Processing and Utilization of Forest
Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, P. R. China
| | - Lei Gao
- Jiangsu
Architectural Decoration Integrated Installation Engineering Technology
Research Center, Nanjing Guohao Decoration
& Installation Engineering Co., Ltd., Nanjing, 210012, P. R. China
| | - Gaosong Yuan
- Jiangsu
Architectural Decoration Integrated Installation Engineering Technology
Research Center, Nanjing Guohao Decoration
& Installation Engineering Co., Ltd., Nanjing, 210012, P. R. China
| | - Licheng Li
- Jiangsu
Co-Innovation Center of Efficient Processing and Utilization of Forest
Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, P. R. China
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11
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Zhang L, Bao Q, Zhang B, Zhang Y, Wan S, Wang S, Lin J, Xiong H, Mei D, Wang Y. Distinct Role of Surface Hydroxyls in Single-Atom Pt 1/CeO 2 Catalyst for Room-Temperature Formaldehyde Oxidation: Acid-Base Versus Redox. JACS AU 2022; 2:1651-1660. [PMID: 35911462 PMCID: PMC9327081 DOI: 10.1021/jacsau.2c00215] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The development of highly efficient catalysts for room-temperature formaldehyde (HCHO) oxidation is of great interest for indoor air purification. In this work, it was found that the single-atom Pt1/CeO2 catalyst exhibits a remarkable activity with complete removal of HCHO even at 288 K. Combining density functional theory calculations and in situ DRIFTS experiments, it was revealed that the active OlatticeH site generated on CeO2 in the vicinity of Pt2+ via steam treatment plays a key role in the oxidation of HCHO to formate and its further oxidation to CO2. Such involvement of hydroxyls is fundamentally different from that of cofeeding water which dissociates on metal oxide and catalyzes the acid-base-related chemistry. This study provides an important implication for the design and synthesis of supported Pt catalysts with atom efficiency for a very important practical application-room-temperature HCHO oxidation.
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Affiliation(s)
- Lina Zhang
- State
Key Laboratory of Physical Chemistry of Solid Surfaces, College of
Chemistry and Chemical Engineering, Xiamen
University, Xiamen 361005, China
- National
Engineering Laboratory for Green Chemical Productions of Alcohols-Ethers-Esters,
College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Qianqian Bao
- State
Key Laboratory of Separation Membranes and Membrane Processes, School
of Chemical Engineering and Technology, Tiangong University, Tianjin 300387, China
| | - Bangjie Zhang
- State
Key Laboratory of Physical Chemistry of Solid Surfaces, College of
Chemistry and Chemical Engineering, Xiamen
University, Xiamen 361005, China
- National
Engineering Laboratory for Green Chemical Productions of Alcohols-Ethers-Esters,
College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Yuanbao Zhang
- State
Key Laboratory of Physical Chemistry of Solid Surfaces, College of
Chemistry and Chemical Engineering, Xiamen
University, Xiamen 361005, China
- National
Engineering Laboratory for Green Chemical Productions of Alcohols-Ethers-Esters,
College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Shaolong Wan
- State
Key Laboratory of Physical Chemistry of Solid Surfaces, College of
Chemistry and Chemical Engineering, Xiamen
University, Xiamen 361005, China
- National
Engineering Laboratory for Green Chemical Productions of Alcohols-Ethers-Esters,
College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Shuai Wang
- State
Key Laboratory of Physical Chemistry of Solid Surfaces, College of
Chemistry and Chemical Engineering, Xiamen
University, Xiamen 361005, China
- National
Engineering Laboratory for Green Chemical Productions of Alcohols-Ethers-Esters,
College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Jingdong Lin
- State
Key Laboratory of Physical Chemistry of Solid Surfaces, College of
Chemistry and Chemical Engineering, Xiamen
University, Xiamen 361005, China
- National
Engineering Laboratory for Green Chemical Productions of Alcohols-Ethers-Esters,
College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Haifeng Xiong
- State
Key Laboratory of Physical Chemistry of Solid Surfaces, College of
Chemistry and Chemical Engineering, Xiamen
University, Xiamen 361005, China
- National
Engineering Laboratory for Green Chemical Productions of Alcohols-Ethers-Esters,
College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Donghai Mei
- State
Key Laboratory of Separation Membranes and Membrane Processes, School
of Chemical Engineering and Technology, Tiangong University, Tianjin 300387, China
| | - Yong Wang
- Voiland
School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99164, United States
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12
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Li D, Liu P, Hao F, Lv Y, Xiong W, Yan C, Wu Y, Luo H. Preparation and application of silver/chitosan-sepiolite materials with antimicrobial activities and low cytotoxicity. Int J Biol Macromol 2022; 210:337-349. [PMID: 35526763 DOI: 10.1016/j.ijbiomac.2022.05.015] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Revised: 04/29/2022] [Accepted: 05/02/2022] [Indexed: 12/24/2022]
Abstract
Antimicrobial materials can prevent microbial infection and affect the beauty and structure of interior walls. Herein, a hybrid material silver/chitosan-sepiolite (Ag/5CTs-Sep) with antimicrobial activities was prepared via impregnation. Its antimicrobial properties were investigated via the disk diffusion method. Results showed that the width of inhibition zone of Ag/5CTs-Sep against Staphylococcus aureus (S. aureus), Escherichia coli (E. coli) and Aspergillus niger reached 58.15, 32.95 and 35.18 mm, respectively. The Sep was a suitable carrier for increasing thermal stability and antimicrobial durability, and chitosan improved the dispersion of silver to enhance antimicrobial activities. In addition, characterization indicated that the modification of Sep by CTs can promote the formation of lattice oxygen in Ag/5CTs-Sep, which can induce a high reactive oxygen species (ROS) content, causing the death of microbials. The antifungal mechanism revealed that the death of Aspergillus niger was due to Ag/5CTs-Sep that induced the production of high ROS level and damaged cell membrane. Moreover, Ag/5CTs-Sep possessed low cytotoxicity, and an applied test of the water-based coatings showed that the addition of Ag/5CTs-Sep could both effectively inhibit microorganisms and meet the performance standards for water-based coatings. This work may provide new guidance for the design and application of antibacterial materials.
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Affiliation(s)
- Dongdong Li
- College of Chemical Engineering, Xiangtan University, Xiangtan 411105, China
| | - Pingle Liu
- College of Chemical Engineering, Xiangtan University, Xiangtan 411105, China; National & Local United Engineering Research Center for Chemical Process Simulation and Intensification, Xiangtan University, Xiangtan 411105, China; Engineering Research Center for Chemical Process Simulation and Optimization, Ministry of Education, Xiangtan University, Xiangtan 411105, China.
| | - Fang Hao
- College of Chemical Engineering, Xiangtan University, Xiangtan 411105, China; National & Local United Engineering Research Center for Chemical Process Simulation and Intensification, Xiangtan University, Xiangtan 411105, China.
| | - Yang Lv
- College of Chemical Engineering, Xiangtan University, Xiangtan 411105, China
| | - Wei Xiong
- College of Chemical Engineering, Xiangtan University, Xiangtan 411105, China
| | - Cheng Yan
- College of Chemical Engineering, Xiangtan University, Xiangtan 411105, China
| | - Yi Wu
- College of Chemical Engineering, Xiangtan University, Xiangtan 411105, China
| | - He''an Luo
- College of Chemical Engineering, Xiangtan University, Xiangtan 411105, China; National & Local United Engineering Research Center for Chemical Process Simulation and Intensification, Xiangtan University, Xiangtan 411105, China; Engineering Research Center for Chemical Process Simulation and Optimization, Ministry of Education, Xiangtan University, Xiangtan 411105, China
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13
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Yan Z, Huang G, Wang G, Xiang M, Han X, Xu Z. Fluorescent lamp promoted formaldehyde removal over CeO2 catalysts at ambient temperature. J RARE EARTH 2022. [DOI: 10.1016/j.jre.2021.06.015] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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14
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Chen M, Wang W, Qiu Y, Wen H, Li G, Yang Z, Wang P. Identification of Active Sites in HCHO Oxidation over TiO 2-Supported Pt Catalysts. ACS Catal 2022. [DOI: 10.1021/acscatal.2c01150] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Muhua Chen
- School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, P. R. China
| | - Weizhen Wang
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, P. R. China
| | - Yuping Qiu
- School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, P. R. China
| | - He Wen
- School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, P. R. China
| | - Guangyao Li
- School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, P. R. China
| | | | - Ping Wang
- School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, P. R. China
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15
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Liu J, Chen W, He T, Fang Y, Zhong Z, Wang X, Li Z, Song Y. Lewis base sites of non-oxide supports boost oxygen absorption and activation over supported Pt catalysts. RSC Adv 2022; 12:12537-12543. [PMID: 35480376 PMCID: PMC9040154 DOI: 10.1039/d2ra00538g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Accepted: 04/11/2022] [Indexed: 11/28/2022] Open
Abstract
Formaldehyde (HCHO) oxidation to improve indoor air quality has attracted extensive attention. Designing efficient catalysts for HCHO removal at room temperature still remains challenging. Herein, we report a novel strategy to boost HCHO oxidation by the synergistic effect of Pt nanoparticles and C3N4. The pyridine nitrogen of C3N4 can create Lewis base sites, which function in adsorbing and activating O2 molecules. As the preparation temperature increased, the pyridine nitrogen content increased on the C3N4 surface, leading to a more significant synergistic effect. The mechanism study by in situ DRIFTS indicated that the adsorbed O2 molecules were activated by Pt/C3N4. As a result, the Pt/C3N4-650 has the most outstanding performance for HCHO oxidation at room temperature. HCHO can be completely eliminated with a concentration of 80 ppm at room temperature at a GHSV of 50 000 ml g−1 h−1. This study will provide a new perspective to design efficient HCHO oxidation catalysts. Efficient purification of HCHO by C3N4 supported Pt nanoparticles at room temperature.![]()
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Affiliation(s)
- Jianye Liu
- Department of Chemistry, Shantou University Guangdong 515063 China
| | - Wenbin Chen
- Department of Chemistry, Shantou University Guangdong 515063 China
| | - Taihe He
- Department of Chemistry, Shantou University Guangdong 515063 China
| | - Yiwen Fang
- Department of Chemistry, Shantou University Guangdong 515063 China
| | - ZiYi Zhong
- Department of Chemistry Engineering, Guangdong Technion-Israel Institute of Technology (GTIIT) Guangdong 515063 China.,Technion-Israel Institute of Technology (IIT) Haifa 32000 Israel
| | - Xiaoming Wang
- Department of Chemistry, Shantou University Guangdong 515063 China
| | - Zhen Li
- Department of Chemistry, Shantou University Guangdong 515063 China
| | - Yibing Song
- Department of Chemistry, Shantou University Guangdong 515063 China
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16
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He J, Yang C, Deng Y, Ouyang Z, Huang Z, Yang J, Zhou J, He C, Dang Z. Mechanistic insights into the environmental fate of tetracycline affected by ferrihydrite: Adsorption versus degradation. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 811:152283. [PMID: 34902411 DOI: 10.1016/j.scitotenv.2021.152283] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2021] [Revised: 11/22/2021] [Accepted: 12/05/2021] [Indexed: 06/14/2023]
Abstract
Tetracycline (TC), a widely used antibiotic, is frequently detected in soil environments. It has a strong tendency to form complexes with metals, including iron (oxyhydr)oxide. In this study, ferrihydrite (Fh), a representative iron oxyhydroxide of the iron plaques on the surface of plant roots, was chosen to study the contributions of iron oxyhydroxide on the environmental fate of TC in the rhizosphere environment. Fh adsorption isotherm of TC showed good fitting to the Freundlich model, and the Fh adsorption capacity of TC was found much larger than the other iron oxyhydroxide of high crystallinity. The adsorption mechanisms mainly included electrostatic interaction, H-bonding, and complexation. The results of FTIR and XPS spectra revealed that tricarbonylamide, dimethylamino, and the hydroxyl in the B ring of TC were mainly responsible for the complexation with Fh surface hydroxyl groups. Furthermore, it should be noted that the adsorbed TC on Fh could be degraded and the degradation kinetics of TC better fitted to the pseudo-second-order model. Fh could promote electron transfer from TC to Fe(III) on the Fh surface, which led to the degradation of TC and the formation of Fe(II) ions. The degradation pathways of TC mainly involved three reactions: hydroxylation, dealkylation, and deamination. This study provides mechanistic insights on TC-Fh interaction, which improves the understanding of TC fate in the rhizosphere environment.
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Affiliation(s)
- Junheng He
- School of Environment and Energy, South China University of Technology, Guangzhou, Guangdong 510006, China
| | - Chen Yang
- School of Environment and Energy, South China University of Technology, Guangzhou, Guangdong 510006, China; The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou, Guangdong 510006, China; Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, South China University of Technology, Guangzhou, Guangdong 510006, China.
| | - Yurong Deng
- School of Environment and Energy, South China University of Technology, Guangzhou, Guangdong 510006, China
| | - Zhuozhi Ouyang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Ziqing Huang
- School of Environment and Energy, South China University of Technology, Guangzhou, Guangdong 510006, China
| | - Jingjing Yang
- School of Environment and Energy, South China University of Technology, Guangzhou, Guangdong 510006, China
| | - Jini Zhou
- School of Environment and Energy, South China University of Technology, Guangzhou, Guangdong 510006, China
| | - Chunfeng He
- School of Environment and Energy, South China University of Technology, Guangzhou, Guangdong 510006, China
| | - Zhi Dang
- School of Environment and Energy, South China University of Technology, Guangzhou, Guangdong 510006, China; The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou, Guangdong 510006, China
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17
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Xie Q, Lei C, Chen W, Huang B. Mesoporous ferrihydrite-supported Pd nanoparticles for enhanced catalytic dehalogenation of chlorinated environmental pollutant. J Colloid Interface Sci 2022; 608:2907-2920. [PMID: 34839921 DOI: 10.1016/j.jcis.2021.11.024] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2021] [Revised: 10/21/2021] [Accepted: 11/06/2021] [Indexed: 01/11/2023]
Abstract
Organic chlorides are a group of ubiquitous environmental pollutants that have attracted wide attention because of their carcinogenetic effect on human. Catalytic hydrodechlorination represents one of the most promising methods for the removal of these contaminants, but it suffers from drawbacks such as catalytic inefficiency and/or instability, and the danger of using H2 as hydrogen source. The relationship between the catalyst structure and its dehalogenation activity has not been completely understood. By combining the advantages of Pd nanocatalyst and mesoporous ferrihydrite (Fh) with its distinctive structure, here we present a new composite material with Pd nanoparticles (NPs) supported onto the Fh (Pd/Fh), which has excellent catalytic dehalogenation performance with a rapid, complete dechlorination of chlorophenol (turnover frequency 25.2 min-1) and the ability to perform well over a wide range of pH and temperature. The superior catalytic property of Pd/Fh can be attributed to the three unique functions of Fh, including: 1) having abundant hydroxyl groups that provide interaction sites with metals for incorporating highly dispersed small Pd NPs; 2) facilitating the fast adsorption of chlorophenol onto the catalyst surface via hydrogen bonding and importantly, 3) working as an electron mediator to greatly enhance the electron transfer from iron or chemicals (e.g., NaBH4) to the catalyst, thereby achieving a synergistic effect between Pd catalyst and support, and an enhanced dechlorination activity. In essence, this work presents a promising catalyst for the efficient dehalogenation of chlorinated environmental pollutants and provides an insight into the relationship between catalyst structure and dehalogenation activity.
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Affiliation(s)
- Qianqian Xie
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control, Hunan University, Ministry of Education, Changsha 410082, PR China
| | - Chao Lei
- School of Hydraulic and Environmental Engineering, Changsha University of Science & Technology, Changsha 410114, PR China
| | - Wenqian Chen
- Department of Pharmacy, National University of Singapore, S9, 4 Science Drive 2, Singapore 117544, Singapore
| | - Binbin Huang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control, Hunan University, Ministry of Education, Changsha 410082, PR China.
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18
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19
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Ding J, Liu J, Yang Y, Zhao L, Yu Y. Understanding A-site tuning effect on formaldehyde catalytic oxidation over La-Mn perovskite catalysts. JOURNAL OF HAZARDOUS MATERIALS 2022; 422:126931. [PMID: 34425429 DOI: 10.1016/j.jhazmat.2021.126931] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Revised: 08/13/2021] [Accepted: 08/15/2021] [Indexed: 06/13/2023]
Abstract
A combination study of density functional theory (DFT) calculation and microkinetic analysis was carried out to investigate A-site tuning effect on formaldehyde (HCHO) oxidation over La-Mn perovskite catalysts (A = Sr, Ag, and Sn). The oxygen mobility of A-doped LaMnO3 catalysts and reaction mechanism of HCHO oxidation on catalyst surfaces were investigated. The microkinetic simulation was performed to quantitatively determine the activity of catalysts toward the HCHO catalytic oxidation. The results indicated that A-site tuning weakens the binding energy of Mn-O bond of LaMnO3 surface and facilitates the formation of surface oxygen vacancy. The presence of dopants can significantly reduce the activation energy of O2 dissociation, which ascribes to the facilitation of electron transfer between oxygen species and catalyst surfaces. The reaction cycle of HCHO oxidation contains seven steps: HCHO adsorption, HCHO* dehydrogenation, CHO* dehydrogenation, CO2 desorption, H2O desorption, O2 adsorption and oxygen vacancy recovery. The dopants promote HCHO adsorption and reduce the activation energy of HCHO oxidation. Two elementary steps control the overall reaction rate of HCHO oxidation. CHO* dehydrogenation step has the largest degree of rate control value at low temperature and O2 adsorption step controls the whole reaction at high temperature.
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Affiliation(s)
- Junyan Ding
- State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Jing Liu
- State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
| | - Yingju Yang
- State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
| | - Liming Zhao
- State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Yingni Yu
- State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
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20
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Peng S, Rao Y, Huang Y, Li T, Li R, Cao JJ, Lee S. N-Coordinated Ir single atoms anchored on carbon octahedrons for catalytic oxidation of formaldehyde under ambient conditions. Catal Sci Technol 2022. [DOI: 10.1039/d2cy00743f] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
N-Coordinated Ir single atoms using N-doped carbon as a non-oxide support for formaldehyde removal under ambient conditions for the first time.
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Affiliation(s)
- Shiqi Peng
- School of Human Settlements and Civil Engineering, Xi'an Jiaotong University, Xi'an 710049, China
- Key Laboratory of Aerosol Chemistry & Physics, State Key Laboratory of Loess and Quaternary Geology (SKLLQG), Institute of Earth Environment, Chinese Academy of Sciences (CAS), Xi'an 710061, China
| | - Yongfang Rao
- Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, China
| | - Yu Huang
- Key Laboratory of Aerosol Chemistry & Physics, State Key Laboratory of Loess and Quaternary Geology (SKLLQG), Institute of Earth Environment, Chinese Academy of Sciences (CAS), Xi'an 710061, China
- CAS Center for Excellence in Quaternary Science and Global Change, Xi'an 710061, China
| | - Tan Li
- School of Environment and Energy, South China University of Technology, Guangzhou 51006, China
| | - Rong Li
- Key Laboratory of Aerosol Chemistry & Physics, State Key Laboratory of Loess and Quaternary Geology (SKLLQG), Institute of Earth Environment, Chinese Academy of Sciences (CAS), Xi'an 710061, China
- CAS Center for Excellence in Quaternary Science and Global Change, Xi'an 710061, China
| | - Jun-ji Cao
- School of Human Settlements and Civil Engineering, Xi'an Jiaotong University, Xi'an 710049, China
- Key Laboratory of Aerosol Chemistry & Physics, State Key Laboratory of Loess and Quaternary Geology (SKLLQG), Institute of Earth Environment, Chinese Academy of Sciences (CAS), Xi'an 710061, China
- CAS Center for Excellence in Quaternary Science and Global Change, Xi'an 710061, China
| | - Shuncheng Lee
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, China
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21
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Huang Q, Xu L, Xiao Y, Zhu J, An G, Li P, Yang B, Chen M, Yang H. Application of MnCeO supported on palygorskite and Al(OH)3 for HCHO oxidation: Catalytic performance and stability. J RARE EARTH 2021. [DOI: 10.1016/j.jre.2021.11.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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22
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Abstract
Air pollution has been a recurring problem in northern Chinese cities, and high concentrations of PM2.5 in winter have been a particular cause for concern. Secondary aerosols converted from precursor gases (i.e., nitrogen oxides and volatile organic compounds) evidently account for a large fraction of the PM2.5. Conventional control methods, such as dust removal, desulfurization, and denitrification, help reduce emissions from stationary combustion sources, but these measures have not led to decreases in haze events. Recent advances in nanomaterials and nanotechnology provide new opportunities for removing fine particles and gaseous pollutants from ambient air and reducing the impacts on human health. This review begins with overviews of air pollution and traditional abatement technologies, and then advances in ambient air purification by nanotechnologies, including filtration, adsorption, photocatalysis, and ambient-temperature catalysis are presented—from fundamental principles to applications. Current state-of-the-art developments in the use of nanomaterials for particle removal, gas adsorption, and catalysis are summarized, and practical applications of catalysis-based techniques for air purification by nanomaterials in indoor, semi-enclosed, and open spaces are highlighted. Finally, we propose future directions for the development of novel disinfectant nanomaterials and the construction of advanced air purification devices.
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23
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The Effect of Pretreatment on the Reactivity of Pd/Al
2
O
3
in Room Temperature Formaldehyde Oxidation. ChemCatChem 2021. [DOI: 10.1002/cctc.202101091] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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Chen M, Qiu Y, Wang W, Li X, Wang J, Wen H, Yang Z, Wang P. Engineering oxygen vacancies via amorphization in conjunction with W-doping as an approach to boosting catalytic properties of Pt/Fe-W-O for formaldehyde oxidation. JOURNAL OF HAZARDOUS MATERIALS 2021; 416:126224. [PMID: 34492978 DOI: 10.1016/j.jhazmat.2021.126224] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Revised: 05/07/2021] [Accepted: 05/23/2021] [Indexed: 06/13/2023]
Abstract
Engineering functional defects in support materials has gained ever-increasing attention as a novel approach to boosting the catalytic performance of oxide-supported catalysts. Herein, we demonstrate the feasibility of engineering oxygen vacancy in iron oxide through amorphization in conjunction with foreign cation doping and elucidate the important role of support functionality in the catalytic oxidation of formaldehyde (HCHO). A supported Pt catalyst on Fe-W-O amorphous nanosheets (denoted as Pt/a-Fe-W-O) was synthesized using a one-step solvothermal method. This simple method allowed us to simultaneously create abundant oxygen vacancies in the substrate and to ensure uniform dispersion of tiny Pt nanoparticles with an average diameter of 1.4 nm on the high-surface-area substrate. This renders an increased possibility of Pt/O-vacancy coexistence in close proximity, which synergistically boosts the formation of active oxygen and surface hydroxyl species. Consequently, the Pt/a-Fe-W-O catalyst with an optimal W/Fe molar ratio of 0.08:1 and a 1.51 wt% Pt loading exhibited a high specific reaction rate of 68.3 μmol gPt-1 s-1 and excellent stability during 24 h continuous test, outperforming most existing HCHO oxidation catalysts. Our study highlights the importance of functional oxygen defects in construction of synergistic active sites for promoting the reactions requiring multiple active species.
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Affiliation(s)
- Muhua Chen
- School of Materials Science and Engineering, Key Laboratory of Advanced Energy Storage Materials of Guangdong Province, South China University of Technology, Guangzhou 510641, PR China
| | - Yuping Qiu
- School of Materials Science and Engineering, Key Laboratory of Advanced Energy Storage Materials of Guangdong Province, South China University of Technology, Guangzhou 510641, PR China
| | - Weizhen Wang
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, PR China
| | - Xinyan Li
- School of Materials Science and Engineering, Key Laboratory of Advanced Energy Storage Materials of Guangdong Province, South China University of Technology, Guangzhou 510641, PR China
| | - Jiajun Wang
- School of Materials Science and Engineering, Key Laboratory of Advanced Energy Storage Materials of Guangdong Province, South China University of Technology, Guangzhou 510641, PR China
| | - He Wen
- School of Materials Science and Engineering, Key Laboratory of Advanced Energy Storage Materials of Guangdong Province, South China University of Technology, Guangzhou 510641, PR China
| | - Zhiqing Yang
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, PR China
| | - Ping Wang
- School of Materials Science and Engineering, Key Laboratory of Advanced Energy Storage Materials of Guangdong Province, South China University of Technology, Guangzhou 510641, PR China.
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25
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Zhang S, Zhuo Y, Ezugwu CI, Wang CC, Li C, Liu S. Synergetic Molecular Oxygen Activation and Catalytic Oxidation of Formaldehyde over Defective MIL-88B(Fe) Nanorods at Room Temperature. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:8341-8350. [PMID: 34076409 DOI: 10.1021/acs.est.1c01277] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Defective MIL-88B(Fe) nanorods are exploited as exemplary iron-bearing metal-organic framework (MOF) catalyst for molecular oxygen (O2) activation at ambient temperature, triggering effective catalytic oxidation of formaldehyde (HCHO), one of the major indoor air pollutants. Defective MIL-88B(Fe) nanorods, growing along the [001] direction, expose abundant coordinatively unsaturated Fe-sites (Fe-CUSs) along extended hexagonal channels with a diameter of ca. 5 Å, larger enough for the diffusion of O2 (3.46 Å) and HCHO (2.7 Å). The Lewis acid-base interaction between Fe-CUSs and accessible HCHO accelerates the FeIII/FeII cycle, catalyzing Fenton-like O2 activation to produce reactive oxidative species (ROSs), including superoxide radicals (•O2-), hydroxyl radicals (•OH), and singlet oxygen (1O2). Consequently, adsorbed HCHO can be oxidized into CO2 with a considerable mineralization efficiency (over 80%) and exceptional recyclability (4 runs, 48 h). Dioxymethylene (CH2OO), formate (HCOO-) species, and formyl radicals (•CHO) are recorded as the main reaction intermediates during HCHO oxidation. HCHO, H2O, and O2 are captured and activated by abundant FeIII/FeII-CUSs as acid/base and redox sites, triggering synergetic ROS generation and HCHO oxidation, involving cooperative acid-base and redox catalysis processes. This study will bring new insights into exploiting novel MOF catalysts for efficient O2 activation and reliable indoor air purification at ambient temperature.
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Affiliation(s)
- Shuping Zhang
- School of Environmental Science and Engineering, Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou 510006, P. R. China
| | - Yifan Zhuo
- School of Environmental Science and Engineering, Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou 510006, P. R. China
| | - Chizoba I Ezugwu
- School of Environmental Science and Engineering, Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou 510006, P. R. China
| | - Chong-Chen Wang
- Beijing Key Laboratory of Functional Materials for Building Structure and Environment Remediation, Beijing University of Civil Engineering and Architecture, Beijing 100044, P. R. China
| | - Chuanhao Li
- School of Environmental Science and Engineering, Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou 510006, P. R. China
| | - Shengwei Liu
- School of Environmental Science and Engineering, Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou 510006, P. R. China
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26
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Zhao H, Tang B, Tang J, Cai Y, Cui Y, Liu H, Wang L, Wang Y, Zhan W, Guo Y, Guo Y. Ambient Temperature Formaldehyde Oxidation on the Pt/Na-ZSM-5 Catalyst: Tuning Adsorption Capacity and the Pt Chemical State. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.1c00732] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hailin Zhao
- Key Laboratory for Advanced Materials, Laboratory for Research Institute of Industrial Catalysis, School of Chemistry & Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China
| | - Bingjing Tang
- Key Laboratory for Advanced Materials, Laboratory for Research Institute of Industrial Catalysis, School of Chemistry & Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China
| | - Jie Tang
- Technology Department, Shanghai HuaYi New Material Co., Ltd., 139 Pugong Road, Shanghai 201507, China
| | - Yafeng Cai
- Key Laboratory for Advanced Materials, Laboratory for Research Institute of Industrial Catalysis, School of Chemistry & Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China
| | - Yao Cui
- Technology Department, Shanghai HuaYi New Material Co., Ltd., 139 Pugong Road, Shanghai 201507, China
| | - Hao Liu
- Key Laboratory for Advanced Materials, Laboratory for Research Institute of Industrial Catalysis, School of Chemistry & Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China
| | - Li Wang
- Key Laboratory for Advanced Materials, Laboratory for Research Institute of Industrial Catalysis, School of Chemistry & Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China
| | - Yunsong Wang
- Key Laboratory for Advanced Materials, Laboratory for Research Institute of Industrial Catalysis, School of Chemistry & Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China
| | - Wangcheng Zhan
- Key Laboratory for Advanced Materials, Laboratory for Research Institute of Industrial Catalysis, School of Chemistry & Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China
| | - Yanglong Guo
- Key Laboratory for Advanced Materials, Laboratory for Research Institute of Industrial Catalysis, School of Chemistry & Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China
| | - Yun Guo
- Key Laboratory for Advanced Materials, Laboratory for Research Institute of Industrial Catalysis, School of Chemistry & Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China
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Bastakoti BP, Kuila D, Salomon C, Konarova M, Eguchi M, Na J, Yamauchi Y. Metal-incorporated mesoporous oxides: Synthesis and applications. JOURNAL OF HAZARDOUS MATERIALS 2021; 401:123348. [PMID: 32763679 DOI: 10.1016/j.jhazmat.2020.123348] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Revised: 06/24/2020] [Accepted: 06/27/2020] [Indexed: 06/11/2023]
Abstract
Mesoporous oxides are outstanding metal nanoparticle catalyst supports owing to their well-defined porous structures. Such mesoporous architectures not only prevent the aggregation of metal nanoparticles but also enhance their catalytic performance. Metal/metal oxide heterojunctions exhibit unique chemical and physical properties because of the surface reconstruction around the junction and electron transfer/interaction across the interface. This article reviews the methods used for synthesizing metal-supported hybrid nanostructures and their applications as catalysts for environmental remediation and sensors for detecting hazardous materials.
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Affiliation(s)
- Bishnu Prasad Bastakoti
- Department of Chemistry, Applied Sciences & Technology, North Carolina Agricultural and Technical State University, Greensboro, NC 27411, USA.
| | - Debasish Kuila
- Department of Chemistry, Applied Sciences & Technology, North Carolina Agricultural and Technical State University, Greensboro, NC 27411, USA
| | - Carlos Salomon
- Exosome Biology Laboratory, Centre for Clinical Diagnostics, University of Queensland Centre for Clinical Research, Royal Brisbane and Women's Hospital, The University of Queensland, Brisbane, Queensland, Australia
| | - Muxina Konarova
- Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Miharu Eguchi
- Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, Queensland 4072, Australia; International Research Center for Materials Nanoarchitechtonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Jongbeom Na
- Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, Queensland 4072, Australia; International Research Center for Materials Nanoarchitechtonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Yusuke Yamauchi
- Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, Queensland 4072, Australia; International Research Center for Materials Nanoarchitechtonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan; School of Chemical Engineering, The University of Queensland, Brisbane, Queensland 4072, Australia; Department of Plant and Environmental New Resources, Kyung Hee University, 1732 Deogyeong-daero, Giheung-gu, Yongin-si, Gyeonggi-do 446-701, South Korea
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28
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Effect of the variation of metal and cerium loadings on CeO2x–TiO2(100−x) supports in the complete catalytic oxidation of formaldehyde. RESEARCH ON CHEMICAL INTERMEDIATES 2020. [DOI: 10.1007/s11164-020-04299-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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29
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Dong N, Ye Q, Chen M, Cheng S, Kang T, Dai H. Sodium-treated sepiolite-supported transition metal (Cu, Fe, Ni, Mn, or Co) catalysts for HCHO oxidation. CHINESE JOURNAL OF CATALYSIS 2020. [DOI: 10.1016/s1872-2067(20)63599-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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30
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Cui W, Liu L, Yang J, Tan N. Effect of preparation method on the catalytic performance of formaldehyde oxidation over octahedral Fe 3O 4 microcrystals supported Pt catalysts. J DISPER SCI TECHNOL 2020. [DOI: 10.1080/01932691.2019.1637752] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Weiyi Cui
- Key Laboratory of Chemical Cleaner Production Technology of Jilin Province, Jilin Institute of Chemical Technology, Jilin, China
| | - Ling Liu
- Institute of Petrochemical Technology, Jilin Institute of Chemical Technology, Jilin, China
| | - Jiajun Yang
- Institute of Petrochemical Technology, Jilin Institute of Chemical Technology, Jilin, China
| | - Naidi Tan
- Key Laboratory of Chemical Cleaner Production Technology of Jilin Province, Jilin Institute of Chemical Technology, Jilin, China
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31
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Wang N, Xu Z, Luo T, Yan Z, Jin M, Shi L. Pt Anchored on Mn(Co)CO
3
/MnCo
2
O
4
Heterostructure for Complete Oxidation of Formaldehyde at Room Temperature. ChemistrySelect 2020. [DOI: 10.1002/slct.202002870] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Nenghuan Wang
- Hubei Key Laboratory of Industrial Fume and Dust Pollution Control and Key Laboratory of Optoelectronic Chemical Materials and Devices of Ministry of Education Jianghan University Wuhan 430056 China
| | - Zhihua Xu
- Hubei Key Laboratory of Industrial Fume and Dust Pollution Control and Key Laboratory of Optoelectronic Chemical Materials and Devices of Ministry of Education Jianghan University Wuhan 430056 China
- School of Chemistry and Chemical Engineering Wuhan University of Science and Technology Wuhan 430081 China
| | - Tingting Luo
- Materials Analysis Center Wuhan University of Technology Wuhan 430070 China
| | - Zhaoxiong Yan
- Hubei Key Laboratory of Industrial Fume and Dust Pollution Control and Key Laboratory of Optoelectronic Chemical Materials and Devices of Ministry of Education Jianghan University Wuhan 430056 China
| | - Mei Jin
- Hubei Key Laboratory of Industrial Fume and Dust Pollution Control and Key Laboratory of Optoelectronic Chemical Materials and Devices of Ministry of Education Jianghan University Wuhan 430056 China
| | - Ling Shi
- Hubei Key Laboratory of Industrial Fume and Dust Pollution Control and Key Laboratory of Optoelectronic Chemical Materials and Devices of Ministry of Education Jianghan University Wuhan 430056 China
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32
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Peng S, Yang X, Strong J, Sarkar B, Jiang Q, Peng F, Liu D, Wang H. MnO 2-decorated N-doped carbon nanotube with boosted activity for low-temperature oxidation of formaldehyde. JOURNAL OF HAZARDOUS MATERIALS 2020; 396:122750. [PMID: 32339880 DOI: 10.1016/j.jhazmat.2020.122750] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Revised: 04/11/2020] [Accepted: 04/13/2020] [Indexed: 06/11/2023]
Abstract
Low-temperature oxidative degradation of formaldehyde (HCHO) using non-noble metal catalysts is challenging. Herein, novel manganese dioxide (MnO2)/N-doped carbon nanotubes (NCNT) composites were prepared with varying MnO2 content. The surface properties and morphologies were analyzed using X-ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM) and transmission electron microscope (TEM). Comparing with MnO2/carbon nanotubes (CNTs) catalyst, the 40% MnO2/NCNT exhibited much better activity and selectivity for HCHO oxidation, mineralizing 95% of HCHO (at 100 ppm) into CO2 at 30 °C at a gas hourly space velocity (GHSV) of 30,000 mL h-1 g-1. Density functional theory (DFT) calculation was used to analyze the difference in the catalytic activity of MnO2 with CNTs and NCNT carrier. It was confirmed that the oxygen on NCNT was more active than CNTs, which facilitated the regeneration of MnO2. This resulted in remarkably boosted activity for HCHO oxidation. The present work thus exploited an inexpensive approach to enhance the catalytic activity of transition metal oxides via depositing them on a suitable support.
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Affiliation(s)
- Shuai Peng
- Hubei Provincial Engineering Laboratory for Clean Production and High Value Utilization of Bio-Based Textile Materials, Wuhan Textile University, Wuhan, 430073, China
| | - Xixian Yang
- School of Environmental and Chemical Engineering, Foshan University, Foshan, 528000, China.
| | - James Strong
- School of Biology and Environmental Science, Centre for Agriculture and the Bioeconomy, Queensland University of Technology, GPO Box 2432, 2 George St, Brisbane, QLD 4001, Australia
| | - Binoy Sarkar
- Lancaster Environment Centre, Lancaster University, Lancaster, LA1 4YQ, UK
| | - Qiang Jiang
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510000, China
| | - Feng Peng
- School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, 510000, China
| | - Defei Liu
- School of Environmental and Chemical Engineering, Foshan University, Foshan, 528000, China
| | - Hailong Wang
- Biochar Engineering Technology Research Center of Guangdong Province, Foshan University, Foshan, Guangdong 528000, China; Key Laboratory of Soil Contamination Bioremediation of Zhejiang Province, Zhejiang A&F University, Hangzhou, Zhejiang 311300, China.
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33
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Chen M, Yin H, Li X, Qiu Y, Cao G, Wang J, Yang X, Wang P. Facet- and defect-engineered Pt/Fe 2O 3 nanocomposite catalyst for catalytic oxidation of airborne formaldehyde under ambient conditions. JOURNAL OF HAZARDOUS MATERIALS 2020; 395:122628. [PMID: 32305715 DOI: 10.1016/j.jhazmat.2020.122628] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2020] [Revised: 03/13/2020] [Accepted: 03/30/2020] [Indexed: 06/11/2023]
Abstract
Formaldehyde (HCHO) is one of the most infamous indoor pollutants that imposes a great threat to human health. Herein, we report the development of a high-performance Pt/Fe2O3 catalyst for HCHO oxidation employing a facet- and defect-engineering strategy, with special focus on the surface structure effect of α-Fe2O3 on the catalytic properties. A supported Pt nanocatalyst on hollow octadecahedral α-Fe2O3 with exclusively exposed {113} and {104} facets was prepared using a hydrothermal method followed by impregnation-reduction treatment. The high-index facets of α-Fe2O3 render the formation of abundant oxygen vacancies and an improved dispersion of Pt nanoparticles. This led to an increased Pt/O-vacancy coexistence in close proximity, which collaboratively promote the generation of active oxygen and surface OH species. As a consequence, the Pt/Fe2O3-HO catalyst exhibited impressively high and stable activity towards HCHO oxidation at room temperature, which was five-fold higher than that of the supported Pt catalyst on commercial α-Fe2O3.
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Affiliation(s)
- Muhua Chen
- School of Materials Science and Engineering, Key Laboratory of Advanced Energy Storage Materials of Guangdong Province, South China University of Technology, Guangzhou 510641, PR China
| | - Hui Yin
- School of Materials Science and Engineering, Key Laboratory of Advanced Energy Storage Materials of Guangdong Province, South China University of Technology, Guangzhou 510641, PR China
| | - Xiaoyin Li
- School of Materials Science and Engineering, Key Laboratory of Advanced Energy Storage Materials of Guangdong Province, South China University of Technology, Guangzhou 510641, PR China
| | - Yuping Qiu
- School of Materials Science and Engineering, Key Laboratory of Advanced Energy Storage Materials of Guangdong Province, South China University of Technology, Guangzhou 510641, PR China
| | - Guoxuan Cao
- School of Materials Science and Engineering, Key Laboratory of Advanced Energy Storage Materials of Guangdong Province, South China University of Technology, Guangzhou 510641, PR China
| | - Jiajun Wang
- School of Materials Science and Engineering, Key Laboratory of Advanced Energy Storage Materials of Guangdong Province, South China University of Technology, Guangzhou 510641, PR China
| | - Xianfeng Yang
- Analytical and Testing Centre, South China University of Technology, Guangzhou 510641, PR China
| | - Ping Wang
- School of Materials Science and Engineering, Key Laboratory of Advanced Energy Storage Materials of Guangdong Province, South China University of Technology, Guangzhou 510641, PR China.
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34
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Eom H, Hwang IH, Lee DY, Lee SM, Kim SS. Preparation of Liquid-Phase Reduction Method-Based Pt/TiO 2 Catalyst and Reaction Characteristics during HCHO Room-Temperature Oxidation. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c02059] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hanki Eom
- Department of Environmental Energy Engineering, Kyonggi University, 154-42, Gwanggyosan-ro, Yeongtong-gu, Suwon-si, Gyeonggi-do 16227, Republic of Korea
| | - In-hyuck Hwang
- Department of Environmental Energy Engineering, Graduate School, Kyonggi University, 154-42, Gwanggyosan-ro, Yeongtong-gu, Suwon-si, Gyeonggi-do 16227, Republic of Korea
| | - Dong Yoon Lee
- Department of Environmental Energy Engineering, Graduate School, Kyonggi University, 154-42, Gwanggyosan-ro, Yeongtong-gu, Suwon-si, Gyeonggi-do 16227, Republic of Korea
| | - Sang Moon Lee
- Department of Environmental Energy Engineering, Kyonggi University, 154-42, Gwanggyosan-ro, Yeongtong-gu, Suwon-si, Gyeonggi-do 16227, Republic of Korea
| | - Sung Su Kim
- Department of Environmental Energy Engineering, Kyonggi University, 154-42, Gwanggyosan-ro, Yeongtong-gu, Suwon-si, Gyeonggi-do 16227, Republic of Korea
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35
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Ding J, Yang Y, Liu J, Wang Z. Catalytic reaction mechanism of formaldehyde oxidation by oxygen species over Pt/TiO 2 catalyst. CHEMOSPHERE 2020; 248:125980. [PMID: 32004886 DOI: 10.1016/j.chemosphere.2020.125980] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 12/22/2019] [Accepted: 01/19/2020] [Indexed: 06/10/2023]
Abstract
Theoretical calculations based on density functional theory (DFT) were employed to uncover the molecular-level oxidation mechanism of HCHO over Pt/TiO2 surface. All the three possible reaction mechanisms including Eley-Rideal mechanism, Langmuir-Hinshelwood mechanism and Mars-Van Krevelen mechanism were deeply investigated to determine the primary channel of HCHO oxidation on Pt/TiO2 catalyst. The adsorption energies and geometries show that HCHO and O2 are chemically adsorbed on Pt and Ti sites of the Pt/TiO2 catalyst surface, respectively. The adsorption energy of O2 (-141.91 kJ/mol) is higher than that of HCHO (-122.03 kJ/mol). HCHO oxidation reaction mainly occurs through the Eley-Rideal mechanism: gaseous HCHO reacts with activated O produced from the dissociation reaction of molecular oxygen on Pt/TiO2 surface by comparing the three possible mechanisms. HCHO oxidation reaction prefers the pathway of HCHO → H2CO2 → HCO2 → CO2. In the whole HCHO oxidation reaction, the elementary reaction of HCO2 dehydrogenation presents the highest activation energy barrier of 230.45 kJ/mol. Therefore, HCO2 dehydrogenation is recognized as the rate-determining step. The proposed skeletal reaction scheme can be used to well understand the microcosmic reaction process of HCHO oxidation on Pt/TiO2 catalyst.
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Affiliation(s)
- Junyan Ding
- State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Yingju Yang
- State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Jing Liu
- State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China.
| | - Zhen Wang
- State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China
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36
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Liu Z, Niu J, Long W, Cui B, Song K, Dong F, Xu D. Highly Efficient MnO 2/AlOOH Composite Catalyst for Indoor Low-Concentration Formaldehyde Removal at Room Temperature. Inorg Chem 2020; 59:7335-7343. [PMID: 32356983 DOI: 10.1021/acs.inorgchem.0c00852] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Indoor formaldehyde from substandard furniture and decorative materials seriously endangers human health. How to remove effectively indoor formaldehyde with low concentration at room temperature is a challenging problem. Using a MnO2/AlOOH composite by the MnO2 modification as a catalyst provides an effective approach to solve this challenge. Here, a new type of MnO2/AlOOH composite catalyst with high ability to remove indoor low-concentration formaldehyde was prepared by redox reaction at room temperature. A MnO2/AlOOH composite with a homogeneous dispersion of MnO2 has high specific surface area and a large amount of surface hydroxyl (-OH) which plays a major role in the adsorption of formaldehyde. A partially crystalline structure was observed in the composite, which contains multivalent Mn ions and a large number of vacancy defects. The surface -OH of composite shows strong oxidation activity through the charge exchange of multivalent Mn ions and vacancy defects. The composite has a higher ability to remove indoor low-concentration formaldehyde compared to the birnessite MnO2 at room temperature. This study proposes a new idea for the improvement of catalytic performance in the structure and composition of the catalyst.
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Affiliation(s)
- Zhiyuan Liu
- Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials, Anhui University of Technology, Ministry of Education, Ma'anshan 243002, China.,Key Laboratory of Metallurgical Emission Reduction and Resources Recycling, Anhui University of Technology, Ministry of Education, 243002 Ma'anshan, China
| | - Jingpeng Niu
- Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials, Anhui University of Technology, Ministry of Education, Ma'anshan 243002, China.,Key Laboratory of Metallurgical Emission Reduction and Resources Recycling, Anhui University of Technology, Ministry of Education, 243002 Ma'anshan, China
| | - Weimin Long
- Zhengzhou Research Institute of Mechanical Engineering, Zhengzhou 450001, China
| | - Bing Cui
- Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials, Anhui University of Technology, Ministry of Education, Ma'anshan 243002, China.,Key Laboratory of Metallurgical Emission Reduction and Resources Recycling, Anhui University of Technology, Ministry of Education, 243002 Ma'anshan, China
| | - Kun Song
- Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials, Anhui University of Technology, Ministry of Education, Ma'anshan 243002, China.,Key Laboratory of Metallurgical Emission Reduction and Resources Recycling, Anhui University of Technology, Ministry of Education, 243002 Ma'anshan, China
| | - Fan Dong
- Research Center for Environmental Science and Technology, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China
| | - Dong Xu
- Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials, Anhui University of Technology, Ministry of Education, Ma'anshan 243002, China.,Key Laboratory of Metallurgical Emission Reduction and Resources Recycling, Anhui University of Technology, Ministry of Education, 243002 Ma'anshan, China
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37
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Li Q, Yan Z, Wang N, Xu Z, Wang G, Huang G. 0D/2D CeO2 quantum dot/NiO nanoplate supported an ultralow-content Pt catalyst for the efficient oxidation of formaldehyde at room temperature. Catal Sci Technol 2020. [DOI: 10.1039/d0cy00653j] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The 0D/2D CeO2 quantum dot/NiO nanoplate supporting ultralow content of the Pt catalyst shows enhanced catalytic decomposition of formaldehyde at room temperature.
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Affiliation(s)
- Qin Li
- Key Laboratory of Optoelectronic Chemical Materials and Devices of Ministry of Education
- and Hubei Key Laboratory of Environmental and Health Effects of Persistent Toxic Substances
- Jianghan University
- Wuhan
- PR China
| | - Zhaoxiong Yan
- Key Laboratory of Optoelectronic Chemical Materials and Devices of Ministry of Education
- and Hubei Key Laboratory of Environmental and Health Effects of Persistent Toxic Substances
- Jianghan University
- Wuhan
- PR China
| | - Nenghuan Wang
- Key Laboratory of Optoelectronic Chemical Materials and Devices of Ministry of Education
- and Hubei Key Laboratory of Environmental and Health Effects of Persistent Toxic Substances
- Jianghan University
- Wuhan
- PR China
| | - Zhihua Xu
- Key Laboratory of Optoelectronic Chemical Materials and Devices of Ministry of Education
- and Hubei Key Laboratory of Environmental and Health Effects of Persistent Toxic Substances
- Jianghan University
- Wuhan
- PR China
| | - Geming Wang
- School of Materials Science and Engineering
- Wuhan Institute of Technology
- Wuhan
- PR China
| | - Gang Huang
- Key Laboratory of Optoelectronic Chemical Materials and Devices of Ministry of Education
- and Hubei Key Laboratory of Environmental and Health Effects of Persistent Toxic Substances
- Jianghan University
- Wuhan
- PR China
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38
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Huang G, Yan Z, Liu S, Luo T, An L, Xu Z. Bimetallic nickel molybdate supported Pt catalyst for efficient removal of formaldehyde at low temperature. J Environ Sci (China) 2020; 87:173-183. [PMID: 31791490 DOI: 10.1016/j.jes.2019.06.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2019] [Revised: 05/27/2019] [Accepted: 06/03/2019] [Indexed: 06/10/2023]
Abstract
Efficient removal of formaldehyde from indoor environments is of significance for human health. In this work, a typical binary transition metal oxide that could provide various oxidation states, β-NiMoO4, was employed as a support to immobilize the active Pt component (Pt/NiMoO4) for catalytic formaldehyde elimination at low ambient temperature (15°C). The results showed that the hydrothermal preparation temperature and time had a noticeable impact on the morphology and catalytic activity of the samples. The catalyst prepared with hydrothermal temperature of 150°C for 4 hr (Pt-150-4) exhibited superior catalytic activity and stability mainly due to its distinctly porous structure, relative abundance of adsorbed surface hydroxyls/water, and high oxidation ability, which resulted from the interaction of Pt with Ni and Mo of the bimetallic NiMoO4 support. Our results might shed light on the rational design of multifunctional catalysts for removal of indoor air pollutants at low ambient temperature.
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Affiliation(s)
- Gang Huang
- Hubei Key Laboratory of Environmental and Health Effects of Persistent Toxic Substances, and Key Laboratory of Optoelectronic Chemical Materials and Devices of Ministry of Education, Jianghan University, Wuhan 430056, China
| | - Zhaoxiong Yan
- Hubei Key Laboratory of Environmental and Health Effects of Persistent Toxic Substances, and Key Laboratory of Optoelectronic Chemical Materials and Devices of Ministry of Education, Jianghan University, Wuhan 430056, China.
| | - Shuyuan Liu
- Department of Pharmacology, Shenyang Medical College, Shenyang 110034, China
| | - Tingting Luo
- Materials Analysis Center, Wuhan University of Technology, Wuhan 430070, China
| | - Liang An
- Hubei Key Laboratory of Environmental and Health Effects of Persistent Toxic Substances, and Key Laboratory of Optoelectronic Chemical Materials and Devices of Ministry of Education, Jianghan University, Wuhan 430056, China
| | - Zhihua Xu
- Hubei Key Laboratory of Environmental and Health Effects of Persistent Toxic Substances, and Key Laboratory of Optoelectronic Chemical Materials and Devices of Ministry of Education, Jianghan University, Wuhan 430056, China.
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39
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Xu Z, Huang G, Yan Z, Wang N, Yue L, Liu Q. Hydroxyapatite-Supported Low-Content Pt Catalysts for Efficient Removal of Formaldehyde at Room Temperature. ACS OMEGA 2019; 4:21998-22007. [PMID: 31891080 PMCID: PMC6933805 DOI: 10.1021/acsomega.9b03068] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Accepted: 11/27/2019] [Indexed: 06/10/2023]
Abstract
Indoor environmental quality directly affects the life quality and health of human beings, and therefore, it is highly vital to eliminate the volatile organic compounds especially formaldehyde (HCHO), which is regarded as one of the most common harmful pollutants in indoor air. Hydroxyapatite (HAP)-supported Pt (Pt/HAP) catalysts with a low content of Pt (0.2 wt %) obtained via hydrothermal and chemical reduction processes could effectively remove gaseous HCHO from the indoor environment at room temperature. The influence of modifier in the preparation on the catalyst activity was investigated. The HAP and HAP modified by sodium citrate and hexamethylenetetramine-supported 0.2 wt % Pt could completely decompose HCHO into CO2 and water, while HAP modified by sodium dodecyl-sulfate-supported Pt removed HCHO primarily via adsorption. The HAP modified by the sodium citrate catalyst exhibited superior catalytic performance of HCHO compared to the HAP and HAP modified by hexamethylenetetramine and sodium dodecyl-sulfate-supported Pt catalysts, which was mainly because of its higher surface Ca/P ratio providing more Lewis acidic sites (Ca2+) for co-operational capture of HCHO molecules and a larger amount of active oxygen species. Our results indicate that an optimized combination of functional supports and low-content noble metal nanoparticles could be a route to fabricate effective room-temperature catalysts for potential application in indoor air purification.
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Affiliation(s)
- Zhihua Xu
- Key
Laboratory of Optoelectronic Chemical Materials and Devices of
Ministry of Education and Hubei Key Laboratory of Industrial Fume
and Dust Pollution Control and Hubei Key Laboratory of Environmental and
Health Effects of Persistent Toxic Substances, Jianghan University, Wuhan 430056, P. R. China
| | - Gang Huang
- Key
Laboratory of Optoelectronic Chemical Materials and Devices of
Ministry of Education and Hubei Key Laboratory of Industrial Fume
and Dust Pollution Control and Hubei Key Laboratory of Environmental and
Health Effects of Persistent Toxic Substances, Jianghan University, Wuhan 430056, P. R. China
| | - Zhaoxiong Yan
- Key
Laboratory of Optoelectronic Chemical Materials and Devices of
Ministry of Education and Hubei Key Laboratory of Industrial Fume
and Dust Pollution Control and Hubei Key Laboratory of Environmental and
Health Effects of Persistent Toxic Substances, Jianghan University, Wuhan 430056, P. R. China
| | - Nenghuan Wang
- Key
Laboratory of Optoelectronic Chemical Materials and Devices of
Ministry of Education and Hubei Key Laboratory of Industrial Fume
and Dust Pollution Control and Hubei Key Laboratory of Environmental and
Health Effects of Persistent Toxic Substances, Jianghan University, Wuhan 430056, P. R. China
| | - Lin Yue
- Key
Laboratory of Optoelectronic Chemical Materials and Devices of
Ministry of Education and Hubei Key Laboratory of Industrial Fume
and Dust Pollution Control and Hubei Key Laboratory of Environmental and
Health Effects of Persistent Toxic Substances, Jianghan University, Wuhan 430056, P. R. China
| | - Qiongyu Liu
- Key
Laboratory of Optoelectronic Chemical Materials and Devices of
Ministry of Education and Hubei Key Laboratory of Industrial Fume
and Dust Pollution Control and Hubei Key Laboratory of Environmental and
Health Effects of Persistent Toxic Substances, Jianghan University, Wuhan 430056, P. R. China
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40
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Meng K, Wu X, Zhang X, Su S, Huang Z, Min X, Liu Y, Fang M. Efficient Adsorption of the Cd(II) and As(V) Using Novel Adsorbent Ferrihydrite/Manganese Dioxide Composites. ACS OMEGA 2019; 4:18627-18636. [PMID: 31737822 PMCID: PMC6854822 DOI: 10.1021/acsomega.9b02431] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Accepted: 10/14/2019] [Indexed: 06/10/2023]
Abstract
Ferrihydrite/manganese dioxide composites (FH-M) were synthesized from ferrihydrite (FH) and manganese compounds by ex situ synthesis and characterized using X-ray diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy in the present work. The influences of experimental parameters such as the solution pH value and initial concentration of adsorbate on the adsorption uptake of Cd(II)/As(V) was systematically investigated. The adsorption kinetics was analyzed by fitting quasi-first-order and quasi-second-order kinetic equations. The results showed that with increase in the pH value, the adsorption rate of Cd(II) is increased, while that of As(V) is increased first and then decreased. For the kinetic adsorption process, the adsorption performance of FH-M to As(V) was better than that to Cd(II). The quasi-second-order kinetic equation and Freundlich equation were more suitable to describe the adsorption of Cd(II)/As(V). The ligand exchange of Cd(II)/As(V) with the -OH in the composites was confirmed by analyzing the characterization results of X-ray photoelectron spectroscopy and Fourier transform infrared spectroscopy. The high adsorption ability of the FH-M makes it a potentially attractive adsorbent for the removal to Cd(II) and As(V) with a good application prospect.
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Affiliation(s)
- Kaiyue Meng
- Beijing
Key Laboratory of Materials Utilization of Nonmetallic Minerals and
Solid Wastes, National Laboratory of Mineral Materials, School of
Materials Science and Technology, China
University of Geosciences, Beijing 100083, China
| | - Xiaowen Wu
- Beijing
Key Laboratory of Materials Utilization of Nonmetallic Minerals and
Solid Wastes, National Laboratory of Mineral Materials, School of
Materials Science and Technology, China
University of Geosciences, Beijing 100083, China
| | - Xiaoyan Zhang
- Beijing
Key Laboratory of Materials Utilization of Nonmetallic Minerals and
Solid Wastes, National Laboratory of Mineral Materials, School of
Materials Science and Technology, China
University of Geosciences, Beijing 100083, China
| | - Shiming Su
- Institute
of Environment and Sustainable Development in Agriculture, Chinese
Academy of Agricultural Sciences/Key Laboratory of Agro-Environment, Ministry of Agriculture, Beijing 100081, P. R. China
| | - Zhaohui Huang
- Beijing
Key Laboratory of Materials Utilization of Nonmetallic Minerals and
Solid Wastes, National Laboratory of Mineral Materials, School of
Materials Science and Technology, China
University of Geosciences, Beijing 100083, China
| | - Xin Min
- Beijing
Key Laboratory of Materials Utilization of Nonmetallic Minerals and
Solid Wastes, National Laboratory of Mineral Materials, School of
Materials Science and Technology, China
University of Geosciences, Beijing 100083, China
| | - Yan’gai Liu
- Beijing
Key Laboratory of Materials Utilization of Nonmetallic Minerals and
Solid Wastes, National Laboratory of Mineral Materials, School of
Materials Science and Technology, China
University of Geosciences, Beijing 100083, China
| | - Minghao Fang
- Beijing
Key Laboratory of Materials Utilization of Nonmetallic Minerals and
Solid Wastes, National Laboratory of Mineral Materials, School of
Materials Science and Technology, China
University of Geosciences, Beijing 100083, China
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41
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Mild Preoxidation Treatment of Pt/TiO2 Catalyst and Its Enhanced Low Temperature Formaldehyde Decomposition. Catalysts 2019. [DOI: 10.3390/catal9080694] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The typical platinum nanoparticles loaded on titania (Pt/TiO2) were pretreated with mild oxidation (<300 °C) in pure oxygen to enhance the low-temperature formaldehyde (HCHO) decomposition performance. The structural properties of support and platinum nanoparticles were characterized by X-ray diffraction (XRD), physical adsorption/desorption, high-resolution transmission electron microscopy (HRTEM), in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFITS), and temperature-programmed reduction and oxidation (TPR and TPO). The catalytic results showed that the low temperature HCHO decomposition activity of mild pre-oxidized Pt/TiO2 was around three times that of the pristine one. According to the characterization results, the structure of the Pt/TiO2 support and their Pt particle sizes had negligible change after pre-oxidation treatment. The cationic Pt content of Pt/TiO2 and surface roughness of Pt nanoparticles gradually increased with the increasing temperature of the pre-oxidation treatment. Mild pre-oxidation treatment was beneficial to the oxygen activation and water dissociation of Pt/TiO2. In situ HCHO-DFIRTS results showed that the mild pre-oxidation treatment could enhance the dehydrogenation of formate.
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42
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Li H, Cui L, Lu Y, Huang Y, Cao J, Park D, Lee SC, Ho W. In Situ Intermediates Determination and Cytotoxicological Assessment in Catalytic Oxidation of Formaldehyde: Implications for Catalyst Design and Selectivity Enhancement under Ambient Conditions. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:5230-5240. [PMID: 30990308 DOI: 10.1021/acs.est.8b06234] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Formation and decay of formaldehyde oxides (CH2OO) affect the complete oxidation of formaldehyde. However, the speciation and reactivity of CH2OO are poorly understood because of its extremely fast kinetics and indirect measurements. Herein, three isomers of CH2OO (i.e., main formic acid, small dioxirane, and minor CH2OO Criegee) were in situ determined and confirmed as primary intermediates of the room-temperature catalytic oxidation of formaldehyde with two reference catalysts, that is, TiO2/MnO x-CeO2 and Pt/MnO x-CeO2. CH2OO Criegee is quite reactive, whereas formic acid and dioxirane have longer lifetimes. The production, stabilization, and removal of the three intermediates are preferentially performed at high humidity, matching well with the decay rate of CH2OO at approximately 6.6 × 103 s-1 in humid feed gas faster than 4.0 × 103 s-1 in dry feed. By contrast, given that a thinner water/TiO2 interface was well-defined in TiO2/MnO x-CeO2, fewer reductions in the active sites and catalytic activity were found when humidity was decreased. Furthermore, lethal intermediates mostly captured at the TiO2/MnO x-CeO2 surface suppressed the toxic off-gas emissions. This study provides practical insights into the rational design and selectivity enhancement of a reliable catalytic process for indoor air purification under unfavorable ambient conditions.
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Affiliation(s)
- Haiwei Li
- Department of Civil and Environmental Engineering , The Hong Kong Polytechnic University , Hong Kong , China
| | - Long Cui
- Department of Civil and Environmental Engineering , The Hong Kong Polytechnic University , Hong Kong , China
- State Key Laboratory of Loess and Quaternary Geology (SKLLQG) and Key Laboratory of Aerosol Chemistry and Physics , Institute of Earth Environment, Chinese Academy of Sciences , Xi'an 710061 , China
| | - Yanfeng Lu
- State Key Laboratory of Loess and Quaternary Geology (SKLLQG) and Key Laboratory of Aerosol Chemistry and Physics , Institute of Earth Environment, Chinese Academy of Sciences , Xi'an 710061 , China
| | - Yu Huang
- State Key Laboratory of Loess and Quaternary Geology (SKLLQG) and Key Laboratory of Aerosol Chemistry and Physics , Institute of Earth Environment, Chinese Academy of Sciences , Xi'an 710061 , China
| | - Junji Cao
- State Key Laboratory of Loess and Quaternary Geology (SKLLQG) and Key Laboratory of Aerosol Chemistry and Physics , Institute of Earth Environment, Chinese Academy of Sciences , Xi'an 710061 , China
| | - Duckshin Park
- Transportation Environmental Research Team , The Korea Railroad Research Institute , Gyeonggi-do , South Korea
| | - Shun-Cheng Lee
- Department of Civil and Environmental Engineering , The Hong Kong Polytechnic University , Hong Kong , China
| | - Wingkei Ho
- Department of Science and Environmental Studies , The Education University of Hong Kong , Hong Kong , China
- State Key Laboratory of Marine Pollution , The City University of Hong Kong , Hong Kong , China
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43
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Fang R, Feng Q, Huang H, Ji J, He M, Zhan Y, Liu B, Leung DY. Effect of K+ ions on efficient room-temperature degradation of formaldehyde over MnO2 catalysts. Catal Today 2019. [DOI: 10.1016/j.cattod.2018.05.019] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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44
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Acid-Alkali-Treated Natural Mordenite-Supported Platinum Nanoparticles (Pt/MORn-H-OH) for Efficient Catalytic Oxidation of Formaldehyde at Room Temperature. J CHEM-NY 2019. [DOI: 10.1155/2019/4582137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
In this work, a series of natural mordenite-supported platinum (Pt) catalysts were prepared by a facile two-step method, namely, treatment of natural mordenite and then the loading of Pt nanoparticles. The acid-alkali-treated natural mordenite-supported Pt samples (1% Pt/MORn-H-OH) exhibited the highly enhanced catalytic oxidation activity of formaldehyde (HCHO) at room temperature. XRD results showed that the crystalline phase of the mordenite did not change significantly in 1% Pt/MORn-H-OH catalyst. However, the acid-alkali treatment endowed the Pt particles excellent dispersion with the smallest diameter of 2.8 nm in a high loading content, which contributed to the optimal catalytic activity of 1% Pt/MORn-H-OH.
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Huang M, Li Y, Li M, Zhao J, Zhu Y, Wang C, Sharma VK. Active Site-Directed Tandem Catalysis on Single Platinum Nanoparticles for Efficient and Stable Oxidation of Formaldehyde at Room Temperature. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:3610-3619. [PMID: 30835446 DOI: 10.1021/acs.est.9b01176] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The application of tandem catalysis is rarely investigated in degrading organic pollutants in the environment. Herein, a tandem catalyst on single platinum (Pt) nanoparticles (Pt0 NPs) is prepared for the sequential degradation of formaldehyde (HCHO) to carbon dioxide gas [CO2(g)] at room temperature. The synthesis approach includes coating of uniform Pt NPs on SrBi2Ta2O9 platelets using a photoreduction process, followed by calcination of the sample in the atmosphere to tune partial transformation of Pt0 atoms to Pt2+ ions in the tandem catalyst. The conversion of HCHO to CO2(g) is monitored by in situ Fourier transform infrared spectroscopy, which shows first conversion of HCHO to CO32- ions onto Pt0 active sites and subsequently the conversion of CO32- ions to CO2(g) by neighboring Pt2+ species of the catalyst. The later process with Pt2+ species does not allow CO32- poisoning of the catalyst. The enhanced activity of the prepared tandem catalyst to oxidize HCHO is maintained continuously for 680 min. Comparatively, the catalyst without Pt2+ shows activity for only 40 min. Additionally, the tandem catalyst presented herein performs better than the Pt/titanium dioxide (TiO2) catalyst to degrade HCHO. Overall, the tandem catalyst may be applied to degrade organic pollutants efficiently.
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Affiliation(s)
- Mengmeng Huang
- School of Environmental Science and Engineering , Shaanxi University of Science and Technology , Xi'an 710021 , China
| | - Yingxuan Li
- School of Environmental Science and Engineering , Shaanxi University of Science and Technology , Xi'an 710021 , China
| | - Mengwei Li
- School of Environmental Science and Engineering , Shaanxi University of Science and Technology , Xi'an 710021 , China
| | - Jie Zhao
- School of Environmental Science and Engineering , Shaanxi University of Science and Technology , Xi'an 710021 , China
| | - Yunqing Zhu
- School of Environmental Science and Engineering , Shaanxi University of Science and Technology , Xi'an 710021 , China
| | - Chuanyi Wang
- School of Environmental Science and Engineering , Shaanxi University of Science and Technology , Xi'an 710021 , China
| | - Virender K Sharma
- Program for the Environment and Sustainability, Department of Occupational and Environmental Health, School of Public Health , Texas A&M University , College Station , Texas 77843 , United States
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46
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Unravelling platinum nanoclusters as active sites to lower the catalyst loading for formaldehyde oxidation. Commun Chem 2019. [DOI: 10.1038/s42004-019-0129-0] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
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47
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Chen J, Ding J, Li H, Sun J, Rui Z, Ji H. Pt supported on long-rod β-FeOOH as an efficient catalyst for HCHO oxidation at ambient temperature. Catal Sci Technol 2019. [DOI: 10.1039/c9cy00521h] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel Pt/FeOOH catalyst containing highly active interface between Pt and β-FeOOH (010) plane have been developed for HCHO oxidation at ambient temperature.
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Affiliation(s)
- Jiashu Chen
- Fine Chemical Research Institute
- School of Chemistry
- Sun Yat-sen University
- Guangzhou 510275
- P.R. China
| | - Junjie Ding
- Fine Chemical Research Institute
- School of Chemistry
- Sun Yat-sen University
- Guangzhou 510275
- P.R. China
| | - Hongqi Li
- R&D Center of Waste-gas Cleaning & Control
- Huizhou Research Institute of Sun Yat-Sen University
- Huizhou 516081
- P.R. China
| | - Jinfang Sun
- Jiangsu Key Laboratory of Vehicle Emissions Control
- Center of Modern Analysis
- Nanjing University
- Nanjing 210093
- P. R. China
| | - Zebao Rui
- School of Chemical Engineering and Technology
- Sun Yat-sen University
- Zhuhai 519082
- P.R. China
| | - Hongbing Ji
- Fine Chemical Research Institute
- School of Chemistry
- Sun Yat-sen University
- Guangzhou 510275
- P.R. China
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48
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Enhanced mineralization of dimethyl phthalate by heterogeneous ozonation over nanostructured Cu-Fe-O surfaces: Synergistic effect and radical chain reactions. Sep Purif Technol 2019. [DOI: 10.1016/j.seppur.2018.07.016] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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49
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Xing Z, Guo Z, Chen X, Zhang P, Yang W. Optimizing the activity of Pd based catalysts towards room-temperature formic acid decomposition by Au alloying. Catal Sci Technol 2019. [DOI: 10.1039/c8cy02402b] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Herein, a series of PdAu/C alloyed catalysts were synthesized via a modified coprecipitation–reduction method by using carbon powder as a support, and their activities towards formic acid decomposition (FAD) at room temperature (30 °C) were evaluated.
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Affiliation(s)
- Zihao Xing
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry
- College of Chemistry
- Jilin University
- Changchun 130022
- China
| | - Zilong Guo
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry
- College of Chemistry
- Jilin University
- Changchun 130022
- China
| | - Xiangyu Chen
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry
- College of Chemistry
- Jilin University
- Changchun 130022
- China
| | - Peng Zhang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry
- College of Chemistry
- Jilin University
- Changchun 130022
- China
| | - Wensheng Yang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry
- College of Chemistry
- Jilin University
- Changchun 130022
- China
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50
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Liu W, Gong Y, Li X, Luo CW, Liu C, Chao ZS. A TiO2/C catalyst having biomimetic channels and extremely low Pt loading for formaldehyde oxidation. RSC Adv 2019; 9:3965-3971. [PMID: 35518097 PMCID: PMC9060426 DOI: 10.1039/c8ra10314c] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2018] [Accepted: 01/16/2019] [Indexed: 01/31/2023] Open
Abstract
This study presents a TiO2/C hybrid material with biomimetic channels fabricated using a wood template. Repeated impregnations of pretreated wood chips in a Ti precursor were conducted, followed by calcination at 400–600 °C for 4 hours under a nitrogen atmosphere. The generated TiO2 nanocrystals were homogenously distributed inside a porous carbon framework. With an extremely low Pt catalyst loading (0.04–0.1 wt%), the obtained porous catalyst could effectively oxidize formaldehyde to CO2 and H2O even under room temperature (conv. ∼100%). Wood acted as both a structural template and reduction agent for Pt catalyst generation in sintering. Therefore, no post H2 reduction treatment for catalyst activation was required. The hierarchal channel structures, including 2–10 nm mesopores and 20 μm diameter channels, could be controlled by calcination temperature and atmosphere, which was confirmed by SEM and BET characterizations. Based on the abundant availability of wood templates and reduced cost for low Pt loading, this preparation method shows great potential for large-scale applications. This study presents a TiO2/C hybrid material with biomimetic channels fabricated using a wood template.![]()
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Affiliation(s)
- Wei Liu
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha 410082
- China
| | - Yutao Gong
- School of Chemical & Biomolecular Engineering and RBI
- Georgia Institute of Technology
- Atlanta
- USA
| | - Xueping Li
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha 410082
- China
| | - Cai-wu Luo
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha 410082
- China
| | - Congmin Liu
- National Institute of Clean-and-Low-Carbon Energy
- Beijing 102211
- China
| | - Zi-sheng Chao
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha 410082
- China
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