1
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Ao C, Zhong S, Zhang B, Xie Y, Pan B, Zhang W, Wu M. Lanthanum hydroxide@cellulose membranes with tunable pore sizes for selective removal of dyes with the same charges. Int J Biol Macromol 2024; 278:135002. [PMID: 39181352 DOI: 10.1016/j.ijbiomac.2024.135002] [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: 06/11/2024] [Revised: 08/13/2024] [Accepted: 08/21/2024] [Indexed: 08/27/2024]
Abstract
Adsorptive membranes for the efficient separation of dyes with the same charges are quite desirable. Herein, a novel membrane of lanthanum hydroxide/cellulose hydrogel coated filter paper (LC) was prepared through a facile strategy of dip-coating followed by freeze-shaping. With the aid of cellulose gel, the generated La(OH)3 achieved fine dispersion. In addition, the pore size of LC membrane could be regulated by altering the cellulose concentration or the lanthanum chloride dosage, which was crucial for its water flux. In particular, the obtained membrane possessed a high water flux (128.4 L m-2 h-1) and a high dye rejection (97.2 %) for anionic Congo red (CR) only driven by the gravity, which outperformed many previously reported membranes. More intriguingly, its dye rejection for anionic methyl orange (MO) was only 0.9 %, exhibiting high selectivity for dyes with the same charges. Single-solute adsorption experiments indicated that the CR adsorption on the membrane was best fitted by the pseudo-first-order kinetic model, and it followed the Langmuir monolayer adsorption mechanism.
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Affiliation(s)
- Chenghong Ao
- Yunnan Provincial Key Lab of Soil Carbon Sequestration and Pollution Control, Faculty of Environmental Science & Engineering, Kunming University of Science & Technology, Kunming 650500, China
| | - Shouxian Zhong
- Yunnan Provincial Key Lab of Soil Carbon Sequestration and Pollution Control, Faculty of Environmental Science & Engineering, Kunming University of Science & Technology, Kunming 650500, China
| | - Bairui Zhang
- Yunnan Provincial Key Lab of Soil Carbon Sequestration and Pollution Control, Faculty of Environmental Science & Engineering, Kunming University of Science & Technology, Kunming 650500, China
| | - Yan Xie
- Yunnan Provincial Key Lab of Soil Carbon Sequestration and Pollution Control, Faculty of Environmental Science & Engineering, Kunming University of Science & Technology, Kunming 650500, China
| | - Bo Pan
- Yunnan Provincial Key Lab of Soil Carbon Sequestration and Pollution Control, Faculty of Environmental Science & Engineering, Kunming University of Science & Technology, Kunming 650500, China
| | - Wei Zhang
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute at Sichuan University, Chengdu 610065, China.
| | - Min Wu
- Yunnan Provincial Key Lab of Soil Carbon Sequestration and Pollution Control, Faculty of Environmental Science & Engineering, Kunming University of Science & Technology, Kunming 650500, China.
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2
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Gao H, Soto MA, Li Z, Andrew LJ, MacLachlan MJ. Cellulose nanocrystal/halloysite nanotube composite aerogels for water purification. Dalton Trans 2023; 52:12968-12977. [PMID: 37650238 DOI: 10.1039/d3dt01908j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
Abstract
The quest for advanced water purification technologies has been vigorous over recent decades, motivated by the promise of ever more efficient, greener, and affordable tools. Halloysite nanotubes (HNTs) are naturally-occurring materials that have shown potential as dye sorbents. Unfortunately, these nanoclays suffer from low permeation during water treatment, which limits their widespread application. Here, we use cellulose nanocrystals (CNCs) as structural scaffolds to support HNTs and fabricate permeable aerogel sorbent materials with mechanical stability. Aerogels containing 40 wt% HNTs showed a maximum dye adsorption capacity of 60 mg g-1 towards methylene blue, with only 15% decay in efficiency after 5 cycles. The good mechanical properties of these materials allowed for their incorporation into free-flowing purification columns that displayed excellent dye removal ability. Overall, this work provides a new strategy to fabricate green, renewable, and low-cost sorbent materials for the removal of dyes and shows potential for the sorption of other ionic pollutants.
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Affiliation(s)
- Huan Gao
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC, V6T 1Z1, Canada.
- School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, 210023, China
| | - Miguel A Soto
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC, V6T 1Z1, Canada.
| | - Zongzhe Li
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC, V6T 1Z1, Canada.
| | - Lucas J Andrew
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC, V6T 1Z1, Canada.
| | - Mark J MacLachlan
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC, V6T 1Z1, Canada.
- Stewart Blusson Quantum Matter Institute, University of British Columbia, 2355 East Mall, Vancouver, BC, V6T 1Z4, Canada
- WPI Nano Life Science Institute, Kanazawa University, Kanazawa, 920-1192, Japan
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3
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Sharma M, K H, Gaur UK, Ganguli AK. Synthesis of mesoporous SiO 2-CeO 2 hybrid nanostructures with high catalytic activity for transamidation reaction. RSC Adv 2023; 13:13134-13141. [PMID: 37124026 PMCID: PMC10140673 DOI: 10.1039/d3ra01552a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Accepted: 04/17/2023] [Indexed: 05/02/2023] Open
Abstract
Transamidation reactions catalyzed by boronic acid derivatives and metal catalysts are well known nevertheless their requirement for elevated temperatures and long reaction times were considered major obstacles in converting amides to N-alkyl amides with the coupling of primary amides and amines. The acidic-basic co-existence of ceria nanoparticles is considered a perfect choice for different catalytic activities. Mesoporous silica on the other hand is well known for its use as a supporting material for catalysts owing to its excellent characteristics like large surface area, good absorption capacity, and high-temperature stability. The SiO2-CeO2 hybrid nanocomposite was prepared by solvothermal route followed by annealing and the formation of the catalyst was confirmed by XRD, EDX, FTIR, and TEM characterization techniques. The hybrid catalyst shows high catalytic activity towards transamidation reaction at very low temperatures and in solvent-free conditions compared to pure ceria nanoparticles. The SiO2-CeO2 catalyst showed more than 99% selectivity and a remarkable catalytic activity of above 90% for the conversion of N-heptyl amine with acetamide to N-heptyl acetamide at a very low temperature of 120 °C for 3 hours. Furthermore, the catalyst remains stable and active for repeated catalytic cycles. It established 80% catalytic activity even after 4 repeated cycles making it suitable for multiple-time usages.
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Affiliation(s)
- Manu Sharma
- Central University of Gujarat Gandhinagar India
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4
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Surface functional group nanoarchitectonics of TiO2 nanoparticles for enhanced adsorption Ge(IV). J Taiwan Inst Chem Eng 2023. [DOI: 10.1016/j.jtice.2023.104716] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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Zhou L, He S, Xu X, Li G, Jia C. Potassium Titanate Supported Atomically Dispersed Palladium for Catalytic Oxidation. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2204674. [PMID: 36285681 PMCID: PMC9839854 DOI: 10.1002/advs.202204674] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Revised: 10/04/2022] [Indexed: 06/16/2023]
Abstract
Single-atom catalysts based on noble metals provide efficient atomic utilization along with enhanced reactivity. Herein, a convenient strategy to construct atomically dispersed palladium catalyst on layered potassium titanate (KTO), which has enhanced interaction between the TiO6 layer and the palladium atoms, is presented. Due to the presence of K+ ions in the interlayers of KTO, the TiO6 octahedron layers have negative charge, which increases the interaction between Pd atoms and the substrate, thus preventing their agglomeration. In addition, the provision of charge of K+ ion makes the molecular oxygen in the system easier to be activated and promotes catalytic oxidation activity.
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Affiliation(s)
- Li Zhou
- Center of Single‐Molecule SciencesInstitute of Modern OpticsTianjin Key Laboratory of Micro‐scale Optical Information Science and TechnologyFrontiers Science Center for New Organic MatterCollege of Electronic Information and Optical EngineeringNankai University38 Tongyan Road, Jinnan DistrictTianjin300350P. R. China
| | - Shuren He
- School of Chemistry and Chemical EngineeringShandong University27 Shanda Nan Road, Licheng DistrictJinanShandong250100P. R. China
| | - Xiaohong Xu
- School of Chemistry and Chemical EngineeringShandong University27 Shanda Nan Road, Licheng DistrictJinanShandong250100P. R. China
| | - Guangwu Li
- Center of Single‐Molecule SciencesInstitute of Modern OpticsTianjin Key Laboratory of Micro‐scale Optical Information Science and TechnologyFrontiers Science Center for New Organic MatterCollege of Electronic Information and Optical EngineeringNankai University38 Tongyan Road, Jinnan DistrictTianjin300350P. R. China
| | - Chuancheng Jia
- Center of Single‐Molecule SciencesInstitute of Modern OpticsTianjin Key Laboratory of Micro‐scale Optical Information Science and TechnologyFrontiers Science Center for New Organic MatterCollege of Electronic Information and Optical EngineeringNankai University38 Tongyan Road, Jinnan DistrictTianjin300350P. R. China
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Li M, Cheng Q, Shen C, Hong B, Jiang Y, Wei Y, Cai M, Chen J, Sun S. Piezoelectric built-in electric field advancing TiO 2 for highly efficient photocatalytic air purification. RSC Adv 2022; 12:22410-22415. [PMID: 36105997 PMCID: PMC9364438 DOI: 10.1039/d2ra03751c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2022] [Accepted: 07/27/2022] [Indexed: 11/24/2022] Open
Abstract
Photocatalytic air purification is a promising technology; however, it suffers from a limited rate of photocatalytic mineralization (easily inactivated surfactant sites of hydroxyls) and poor kinetics of degradation. Herein, we report a ferroelectric strategy, employing a polyvinylidene fluoride (PVDF) layer embedded with TiO2, where the polarization field of stretched PVDF dramatically enhances and stabilizes active adsorption sites for the promotion of charge separation. The F (-) and H (+) atomic layers with distinct local structures in stretched PVDF increase the electron cloud density around Ti which simultaneously promotes the dissociation of water to form hydroxyl groups which are easier to activate for adsorption of formaldehyde molecules. Besides, the ferroelectric field of stretched PVDF effectively separates the photogenerated charge carriers and facilitates the carriers' transportation of TiO2/PVDF. The optimal stretched TiO2/PVDF exhibits excellent photocatalytic mineralization for formaldehyde with considerable stability. This work may evolve the polarization field as a new method to enhance adsorption and activation of hydroxyls and disclose the mechanism by which hydroxyl radicals mineralize gaseous formaldehyde for photocatalytic air purification.
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Affiliation(s)
- Mengmeng Li
- School of Chemistry and Chemical Engineering, Anhui University Hefei Anhui 230601 China
| | - Qin Cheng
- School of Chemistry and Chemical Engineering, Anhui University Hefei Anhui 230601 China
| | - Cheng Shen
- School of Chemistry and Chemical Engineering, Anhui University Hefei Anhui 230601 China
| | - Bin Hong
- Hefei Innovation Research Institute, Beihang University Hefei Anhui 230013 China
| | - Yong Jiang
- Shanghai Synchrotron Radiation Facility, Zhangjiang National Laboratory, Shanghai Advanced Research Institute, Chinese Academy of Sciences Shanghai 201204 China
| | - Yuxue Wei
- School of Chemistry and Chemical Engineering, Anhui University Hefei Anhui 230601 China
| | - Mengdie Cai
- School of Chemistry and Chemical Engineering, Anhui University Hefei Anhui 230601 China
| | - Jingshuai Chen
- School of Chemistry and Chemical Engineering, Anhui University Hefei Anhui 230601 China
| | - Song Sun
- School of Chemistry and Chemical Engineering, Anhui University Hefei Anhui 230601 China
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Yang D, Hassan QU, Chen QW, Yang HD, Bilal M, Afzal S, Zhou JP. Development of novel K 0.8Ni 0.4Ti 1.6O 4 nano bamboo leaves, microstructural characterization, double absorption, and photocatalytic removal of organic pollutant. ENVIRONMENTAL RESEARCH 2022; 211:113118. [PMID: 35307371 DOI: 10.1016/j.envres.2022.113118] [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: 01/12/2022] [Revised: 02/28/2022] [Accepted: 03/10/2022] [Indexed: 06/14/2023]
Abstract
Novel K0.8Ni0.4Ti1.6O4 (KNTO) nano bamboo leaves were prepared for the first time under a simple hydrothermal method with 3 M KOH at 320 °C over 80 min. Highly pure KNTO possessing layered structure was determined by X-ray diffraction (XRD) and high-resolution transmission electron microscope (HRTEM). Double absorption feature of KNTO semiconductor was revealed at band energies of 1.88 and 2.08 eV by the UV-vis diffuse reflectance spectra and confirmed by the photoluminescence (PL) spectra. The photocatalytic activity was explored by the photodegradation of MB organic dye. KNTO not only exhibits strong adsorptive ability on methylene blue (MB) in dark environment, but also possesses good photodegradation capability of 94% degradation in 60 min. Degradation mechanism revealed that the photogenerated holes play an essential role in the MB degradation process, which is confirmed by trapping experiments. The recycling experiments demonstrated very high recycling ability and durability of KNTO nano bamboo leaves, suggesting KNTO is a potential candidate for high efficiency organic pollutant removal in the wastewater treatment.
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Affiliation(s)
- Dou Yang
- School of Physics and Information Technology, Shaanxi Normal University, Xi'an, 710119, People's Republic of China
| | - Qadeer-Ul Hassan
- School of Physics and Information Technology, Shaanxi Normal University, Xi'an, 710119, People's Republic of China; Institute for Advanced Study, Shenzhen University, Shenzhen, 518060, China
| | - Qi-Wen Chen
- School of Physics and Information Technology, Shaanxi Normal University, Xi'an, 710119, People's Republic of China
| | - Hong-Dan Yang
- School of Physics and Information Technology, Shaanxi Normal University, Xi'an, 710119, People's Republic of China
| | - Muhammad Bilal
- School of Life Science and Food Engineering, Huaiyin Institute of Technology, Huaian, 223003, China
| | - Shahzad Afzal
- Institute for Advanced Study, Shenzhen University, Shenzhen, 518060, China
| | - Jian-Ping Zhou
- School of Physics and Information Technology, Shaanxi Normal University, Xi'an, 710119, People's Republic of China.
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8
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Dong L, Chunyi Zhou BS. Fast and Selective Methyl Blue Adsorption from Aqueous Solution on 3D BiOCl Microspheres. ChemistrySelect 2022. [DOI: 10.1002/slct.202104200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Lihong Dong
- Department of Chemistry Tonghua Normal University Tonghua 134002 China
| | - B. S. Chunyi Zhou
- Department of Chemistry Tonghua Normal University Tonghua 134002 China
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9
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Hassan QU, Channa AI, Zhai QG, Zhu G, Gao Y, Ali N, Bilal M. Recent advancement in Bi 5O 7I-based nanocomposites for high performance photocatalysts. CHEMOSPHERE 2022; 288:132668. [PMID: 34718019 DOI: 10.1016/j.chemosphere.2021.132668] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2021] [Revised: 10/21/2021] [Accepted: 10/23/2021] [Indexed: 06/13/2023]
Abstract
Bi5O7I belongs to the family of bismuth oxyhalides (BiOX, X = Cl, Br, I), having a unique layered structure with an internal electrostatic field that promotes the separation and transfer of photo-generated charge carriers. Interestingly, Bi5O7I exhibits higher thermal stability compared to its other BiOX member compounds and absorption spectrum extended to the visible region. Bi5O7I has demonstrated applications in diverse fields such as photocatalytic degradation of various organic pollutants, marine antifouling, etc. Unfortunately, owing to its wide band gap of ∼2.9 eV, its absorption lies mainly in the ultraviolet region, and a tiny portion of absorption lies in the visible region. Due to limited absorption, the photocatalytic performance of pure Bi5O7I is still facing challenges. In order to reduce the band gap and increase the light absorption capability of Bi5O7I, doping and formation of heterostructure strategies have been employed, which showed promising results in the photocatalytic performance. In addition, the plasmonic heterostructures of Bi5O7I were also developed to further boost the efficiency of Bi5O7I as a photocatalyst. Here, in this review article, we present such recent efforts made for the advanced development of Bi5O7I regarding its synthesis, properties and applications. The strategies for photocatalytic performance enhancement have been discussed in detail. Moreover, in the conclusion section, we have presented the current challenges and discussed possible prospective developments in this field.
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Affiliation(s)
- Qadeer Ul Hassan
- School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, People's Republic of China; Institute for Advanced Study, Shenzhen University, Nanhai Avenue 3688, Shenzhen, 518060, People's Republic of China; College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, People's Republic of China
| | - Ali Imran Channa
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 610054, PR China
| | - Quan-Guo Zhai
- School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, People's Republic of China.
| | - Gangqiang Zhu
- School of Physics and Information Technology, Shaanxi Normal University, Xi'an, 710119, People's Republic of China.
| | - Yongxiang Gao
- Institute for Advanced Study, Shenzhen University, Nanhai Avenue 3688, Shenzhen, 518060, People's Republic of China
| | - Nisar Ali
- Key Laboratory for Palygorskite Science and Applied Technology of Jiangsu Province, National & Local Joint Engineering Research, Center for Deep Utilization Technology of Rock-salt Resource, Faculty of Chemical Engineering, Huaiyin Institute of Technology, Huai'an, 223003, China
| | - Muhammad Bilal
- School of Life Science and Food Engineering, Huaiyin Institute of Technology, Huaian, 223003, China
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10
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Cui Z, Wen J, Chen J, Xue Y, Feng Y, Duan H, Ji B, Li R. Diameter dependent thermodynamics of adsorption on nanowires: A theoretical and experimental study. Chem Eng Sci 2022. [DOI: 10.1016/j.ces.2021.117061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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11
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Zheng G, Cui Y, Zhou Y, Jiang Z, Wang Q, Zhou M, Wang P, Yu Y. Photoenzymatic Activity of Artificial-Natural Bienzyme Applied in Biodegradation of Methylene Blue and Accelerating Polymerization of Dopamine. ACS APPLIED MATERIALS & INTERFACES 2021; 13:56191-56204. [PMID: 34787400 DOI: 10.1021/acsami.1c17098] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Enzymes as biocatalysts have attracted extensive attention. In addition to immobilizing or encapsulating various enzymes for combating the easy loss of enzymatic activity, strengthening the enzymatic activity upon light irradiation is a challenge. To the best of our knowledge, the work of spatiotemporally modulating the catalytic activity of artificial-natural bienzymes with a near-infrared light irradiation has not been reported. Inspired by immobilized enzymes and nanozymes, herein a platinum nanozyme was synthesized; subsequently, the platinum nanozyme was grafted on the body of laccase, thus successfully obtaining the artificial-natural bienzyme. The three-dimensional structure of the artificial-natural bienzyme was greatly different from that of the immobilized enzyme or the encapsulated enzyme. The platinum nanozyme possessed excellent laccase-like activity, which was 3.7 times higher than that of laccase. Meanwhile, the coordination between the platinum nanozyme and laccase was proved. Besides, the cascaded catalysis of artificial-natural bienzyme was verified with hydrogen peroxide as a mediator. The enzymatic activities of artificial-natural bienzyme with and without near-infrared light irradiation were, respectively, 46.2 and 29.5% higher than that of free laccase. Moreover, the reversible catalytic activity of the coupled enzyme could be manipulated with and without a near-infrared light at 808 nm. As a result, the degradation rates of methylene blue catalyzed by the coupled enzyme and the platinum nanozyme were higher than that of laccase. Furthermore, accelerating polymerization of the dopamine was also demonstrated. Briefly, this facile strategy may provide a universal approach to control the catalytic activity of other natural enzymes.
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Affiliation(s)
- Guolin Zheng
- Key Laboratory of Eco-Textiles, Ministry of Education, Jiangnan University, Jiangsu Province, Wuxi 214122, P. R. China
| | - Yifan Cui
- Key Laboratory of Eco-Textiles, Ministry of Education, Jiangnan University, Jiangsu Province, Wuxi 214122, P. R. China
| | - Yu Zhou
- Key Laboratory of Eco-Textiles, Ministry of Education, Jiangnan University, Jiangsu Province, Wuxi 214122, P. R. China
| | - Zhe Jiang
- Key Laboratory of Eco-Textiles, Ministry of Education, Jiangnan University, Jiangsu Province, Wuxi 214122, P. R. China
| | - Qiang Wang
- Key Laboratory of Eco-Textiles, Ministry of Education, Jiangnan University, Jiangsu Province, Wuxi 214122, P. R. China
| | - Man Zhou
- Key Laboratory of Eco-Textiles, Ministry of Education, Jiangnan University, Jiangsu Province, Wuxi 214122, P. R. China
| | - Ping Wang
- Key Laboratory of Eco-Textiles, Ministry of Education, Jiangnan University, Jiangsu Province, Wuxi 214122, P. R. China
| | - Yuanyuan Yu
- Key Laboratory of Eco-Textiles, Ministry of Education, Jiangnan University, Jiangsu Province, Wuxi 214122, P. R. China
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Huo JB, Yu G, Wang J. Magnetic zeolitic imidazolate frameworks composite as an efficient adsorbent for arsenic removal from aqueous solution. JOURNAL OF HAZARDOUS MATERIALS 2021; 412:125298. [PMID: 33951874 DOI: 10.1016/j.jhazmat.2021.125298] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Revised: 01/29/2021] [Accepted: 01/30/2021] [Indexed: 06/12/2023]
Abstract
In this study, magnetic zeolitic imidazolate frameworks (ZIF-8) was prepared by a one-step method, where its evolution involved the coprecipitation reactions concomitant with the self-assembly reactions. Structural characterizations indicated that magnetic ZIF-8 showed irregular polyhedral morphology with a large specific surface area (696.5 m2/g) and saturation magnetization (4.31 emu/g). The as-prepared magnetic ZIF-8 enhanced the adsorption performance of As(III) and As(V), compared with bare Fe3O4. The pseudo second-order kinetic model (R2 = 0.9627 and 0.9893 for As(III) and As(V), respectively) and the Langmuir model (R2 = 0.9441 for As(III) and 0.9851 for As(V)) can fit the adsorption process well, confirming the nature of single-layer homogeneous chemisorption. The adsorption capacity was 30.87 and 17.51 mg/g, and their corresponding values of PC were 2.664 and 1.286 L/g, for As(III) and As(V), respectively. Solution pH showed an adverse effect on As(V) adsorption whereas no obvious effect on As(III). The ionic strength and coexisting ions had not obvious influence on adsorption of As(III) and As(V). The adsorption mechanism was explored and discussed based on the detailed spectroscopy analysis. This adsorbent can be recovered magnetically after use, which is promising for the practical application.
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Affiliation(s)
- Jiang-Bo Huo
- Laboratory of Environmental Technology, INET, Tsinghua University, Beijing 100084, China
| | - Guoce Yu
- Laboratory of Environmental Technology, INET, Tsinghua University, Beijing 100084, China; Beijing Key Laboratory of Radioactive Waste Treatment, INET, Tsinghua University, Beijing 100084, China
| | - Jianlong Wang
- Laboratory of Environmental Technology, INET, Tsinghua University, Beijing 100084, China; Beijing Key Laboratory of Radioactive Waste Treatment, INET, Tsinghua University, Beijing 100084, China.
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13
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Xu L, Pan C, Li S, Yin C, Zhu J, Pan Y, Feng Q. Electrostatic Self-Assembly Synthesis of Three-Dimensional Mesoporous Lepidocrocite-Type Layered Sodium Titanate as a Superior Adsorbent for Selective Removal of Cationic Dyes via an Ion-Exchange Mechanism. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:6080-6095. [PMID: 33969686 DOI: 10.1021/acs.langmuir.1c00913] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Three-dimensional mesoporous lepidocrocite-type layered sodium titanate (LST) was constructed at room temperature by the electrostatic interaction between Ti1-δO24δ- nanosheets and Na+ ions. The results of a systematic X-ray diffraction investigation manifested the transition from the Ti1-δO24δ- nanosheets phase to the titanate/titania phase, which determined a phase diagram as a function of the temperature and NaCl concentration. In addition, scanning electron microscopy, inductively coupled plasma-mass spectrometry, thermogravimetric and differential thermal, N2 adsorption-desorption, Raman spectroscopy, Fourier transform infrared spectroscopy, as well as ζ-potential analyses were utilized for adequate characterization of the LST physical and chemical properties. Furthermore, batch adsorption experiments demonstrated that LST had superior adsorption property and adsorption selectivity toward cationic dyes compared to those of anionic dyes. A multifarious influencing effect on the cationic dye adsorption behavior during the adsorption process was systematically investigated. Moreover, the pseudo-second-order kinetic model felicitously depicted the cationic dye adsorption behavior through an elaborate kinetic study, namely, chemisorption was the main adsorption action. Meanwhile, different adsorption isotherm models were utilized to process the experimental data, uncovering that the adsorption isotherms of cationic dyes on LST were suitable for a Langmuir isothermal model. More importantly, an ion-exchange mechanism was proposed for the cationic dye adsorption on LST, and the ion-exchange reaction occurred with a stoichiometric exchange between 1 mol of Na+ ions in the LST interlayer and 1 mol of MB molecules in the solution. In parallel, the electrochemical impedance spectroscopy and cyclic voltammogram measurements verified that the high ionic conductivity of Na+ ions in the LST interlayer resulted in a superior adsorption property. A two-step acid-base procedure was ultimately adopted to effectively regenerate LST adsorbent. This work provides not only an alternative adsorbent with superior adsorption capacity and adsorption selectivity but also some guiding significance for research on the adsorption mechanism of layered titanates.
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Affiliation(s)
- Linfeng Xu
- School of Earth and Environment, Anhui University of Science and Technology, Huainan, Anhui 232001, China
- Department of Advanced Materials Science, Faculty of Engineering and Design, Kagawa University, 2217-20 Hayashi-cho, Takamatsu 761-0396, Japan
| | - Chengling Pan
- School of Earth and Environment, Anhui University of Science and Technology, Huainan, Anhui 232001, China
| | - Sen Li
- Department of Advanced Materials Science, Faculty of Engineering and Design, Kagawa University, 2217-20 Hayashi-cho, Takamatsu 761-0396, Japan
| | - Chengjie Yin
- Department of Materials Science and Engineering, Anhui University of Science and Technology, Huainan, Anhui 232001, China
| | - Jinbo Zhu
- Department of Materials Science and Engineering, Anhui University of Science and Technology, Huainan, Anhui 232001, China
| | - Yusong Pan
- Department of Materials Science and Engineering, Anhui University of Science and Technology, Huainan, Anhui 232001, China
| | - Qi Feng
- Department of Advanced Materials Science, Faculty of Engineering and Design, Kagawa University, 2217-20 Hayashi-cho, Takamatsu 761-0396, Japan
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14
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Li H, Gao K, Mo B, Meng Q, Li K, Wu J, Hou H. Construction of porous 2D MOF nanosheets for rapid and selective adsorption of cationic dyes. Dalton Trans 2021; 50:3348-3355. [PMID: 33595557 DOI: 10.1039/d0dt04143b] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Porous two-dimensional metal-organic framework (2D-MOF) nanosheets Zr-BTB-H4TBAPy and PCN-134-2D were synthesized and characterized by X-ray diffraction (XRD), N2 adsorption-desorption, scanning electron microscopy (SEM), transmission electron microscopy (TEM), atomic force microscopy (AFM) and zeta potential and subjected to dye adsorption and separation investigation. These 2D-MOF nanosheets are ultrathin, have large surface area and high water stability and can selectively adsorb cationic dyes, rhodamine B (RhB) and methylene blue (MLB), from aqueous solutions, with removal rates of nearly 100% within 10 min. The adsorption kinetic results showed that Zr-BTB-H4TBAPy and PCN-134-2D could effectively and selectively remove cationic dyes from water, followed a pseudo-second-order kinetic model and fitted well with the Freundlich isotherm. The adsorption mechanism studies further indicated that their excellent adsorption and separation performance could be ascribed to their ultrathin and porous features, plentiful exposed surface-active sites, and favorable electrostatic interactions between the adsorbents and cationic dyes. Moreover, the porous 2D MOF nanosheets displayed excellent recyclability and reusability. These outstanding features make them potentially applicable for rapid and selective cationic dye adsorption and separation.
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Affiliation(s)
- Huijie Li
- The College of Chemistry, Zhengzhou University, Zhengzhou, Henan 450001, P. R. China.
| | - Kuan Gao
- The College of Chemistry, Zhengzhou University, Zhengzhou, Henan 450001, P. R. China.
| | - Bingyan Mo
- The College of Chemistry, Zhengzhou University, Zhengzhou, Henan 450001, P. R. China.
| | - Qing Meng
- The College of Chemistry, Zhengzhou University, Zhengzhou, Henan 450001, P. R. China.
| | - Ke Li
- The College of Chemistry, Zhengzhou University, Zhengzhou, Henan 450001, P. R. China.
| | - Jie Wu
- The College of Chemistry, Zhengzhou University, Zhengzhou, Henan 450001, P. R. China.
| | - Hongwei Hou
- The College of Chemistry, Zhengzhou University, Zhengzhou, Henan 450001, P. R. China.
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15
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Yang L, Zhan Y, Yu R, Lan J, Shang J, Dou B, Liu H, Zou R, Lin S. Facile and Scalable Fabrication of Antibacterial CO 2-Responsive Cotton for Ultrafast and Controllable Removal of Anionic Dyes. ACS APPLIED MATERIALS & INTERFACES 2021; 13:2694-2709. [PMID: 33400496 DOI: 10.1021/acsami.0c19750] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
A novel CO2-responsive cotton as an eco-friendly adsorbent derived from poly(4-acryloyloxybenzophenone-co-2-(dimethylamino) ethyl methacrylate) and cotton was fabricated via a facile and fast dip-coating method. As expected, upon CO2 stimulation, the protonated cotton presented CO2-induced "on-off" selective adsorption behaviors toward anionic dyes owing to electrostatic interactions. The adsorption isotherms and kinetics of the CO2-responsive cotton toward anionic dyes obeyed the Langmuir isotherm and pseudo-second-order kinetics models, respectively. It is noteworthy that the CO2-responsive cotton exhibited high adsorption capacity and ultrafast adsorption rate toward anionic dyes with the maximum adsorption capacities of 1785.71 mg g-1 for methyl orange (MO), 1108.65 mg g-1 for methyl blue (MB), and 1315.79 mg g-1 for naphthol green B (NGB), following the adsorption equilibrium times of 5 min for MO, 3 min for MB, and 4 min for NGB. Moreover, the CO2-responsive cotton also exhibited high removal efficiency toward anionic dyes in synthetic dye effluent. Additionally, the CO2-responsive cotton could be facilely regenerated via heat treatment under mild conditions and presented stable adsorption properties even after 15 cycles. Finally, the as-prepared CO2-responsive cotton exhibited outstanding antibacterial activity against E. coli and S. aureus. In summary, this novel CO2-responsive cotton can be viewed as a promising eco-friendly adsorbent material for potential scalable application in dye-contaminated wastewater remediation.
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Affiliation(s)
- Lin Yang
- College of Biomass Science and Engineering, Sichuan University, Chengdu 610065, P.R. China
| | - Yifei Zhan
- College of Biomass Science and Engineering, Sichuan University, Chengdu 610065, P.R. China
| | - Ruiquan Yu
- College of Biomass Science and Engineering, Sichuan University, Chengdu 610065, P.R. China
- National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu 610065, P.R. China
| | - Jianwu Lan
- College of Biomass Science and Engineering, Sichuan University, Chengdu 610065, P.R. China
| | - Jiaojiao Shang
- College of Biomass Science and Engineering, Sichuan University, Chengdu 610065, P.R. China
- National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu 610065, P.R. China
| | - Baojie Dou
- College of Biomass Science and Engineering, Sichuan University, Chengdu 610065, P.R. China
| | - Hongyu Liu
- College of Biomass Science and Engineering, Sichuan University, Chengdu 610065, P.R. China
| | - Rui Zou
- College of Biomass Science and Engineering, Sichuan University, Chengdu 610065, P.R. China
| | - Shaojian Lin
- College of Biomass Science and Engineering, Sichuan University, Chengdu 610065, P.R. China
- National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu 610065, P.R. China
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16
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Mei Y, Qi Y, Li J, Deng X, Ma S, Yao T, Wu J. Construction of yolk/shell Fe3O4@MgSiO3 nanoreactor for enhanced Fenton-like reaction via spatial separation of adsorption sites and activation sites. J Taiwan Inst Chem Eng 2020. [DOI: 10.1016/j.jtice.2020.08.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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