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Motamedisade A, Johnston MR, Alotaibi AEH, Andersson GA. Au 9 nanocluster adsorption and agglomeration control through sulfur modification of mesoporous TiO 2. Phys Chem Chem Phys 2024; 26:9500-9509. [PMID: 38450597 DOI: 10.1039/d3cp05353a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2024]
Abstract
In the present work phenyl phosphine-protected Au9 nanoclusters were deposited onto (3-mercaptopropyl) trimethoxysilane (MPTMS) modified and unmodified mesoporous screen printed TiO2. The removal of the cluster ligands by annealing was applied to enhance the interaction between Au cluster cores and semiconductor surfaces in the creation of efficient photocatalytic systems. The heat treatment could lead to undesired agglomeration of Au clusters, affecting their unique properties as size specific clusters. To address this challenge, the semiconductor surfaces were modified by MPTMS. Characterization techniques confirm the effectiveness of the modification processes, and XPS demonstrates that S functionalized MTiO2 is more efficient than MTiO2 in increasing Au9 NCs adsorption by a factor of 10 and preventing Au cluster agglomeration even after annealing. Overall, this work contributes valuable insights into photocatalytic systems through controlled modification of semiconductor surfaces and Au nanocluster deposition.
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Affiliation(s)
- Anahita Motamedisade
- Institute for Nanoscale Science and Technology, Flinders University, Adelaide 5042, Australia.
| | - Martin R Johnston
- Institute for Nanoscale Science and Technology, Flinders University, Adelaide 5042, Australia.
| | - Amjad E H Alotaibi
- Institute for Nanoscale Science and Technology, Flinders University, Adelaide 5042, Australia.
| | - Gunther A Andersson
- Institute for Nanoscale Science and Technology, Flinders University, Adelaide 5042, Australia.
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2
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Zou W, Bian H, Guo J, Xu J, Guo B. Preparation of Titania-Silica Composite Aerogel at Atmospheric Pressure and Its Catalytic Performance in the Synthesis of Poly (Butylene Succinate). MATERIALS (BASEL, SWITZERLAND) 2023; 16:ma16093296. [PMID: 37176176 PMCID: PMC10179432 DOI: 10.3390/ma16093296] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2023] [Revised: 04/19/2023] [Accepted: 04/20/2023] [Indexed: 05/15/2023]
Abstract
Titanates are widely used in the synthesis of polyesters, such as Poly (butylene succinate) (PBS), due to their excellent catalytic activity for polycondensation. However, the hydrolysis sensitivity of titanate and side reactions at high temperatures restrict the further improvement of the molecular weight of polyesters and lead to the high content of end carboxyl group content in the products. In this work, we prepared titania-silica composite aerogels with resistance to hydrolysis and large specific surface area, which were further explored as an efficient catalyst for polycondensation reactions. A series of titania-silica composite aerogel catalysts for PBS polycondensation were successfully prepared by the sol-gel method. The influence of a Ti/Si ratio on the surface morphology and structure of the aerogels was examined. Titania-silica composite aerogel exhibits the surface characteristics of high specific surface area and high Lewis acid content. The specific surface area of titania-silica composite aerogels can reach 524.59 m2/g, and the Lewis acid content on the surface can reach 370.29 μmol/g. Furthermore, the catalytic performance for the polycondensation reaction of PBS was investigated. The intrinsic viscosity of PBS synthesized by catalysis with the composite catalyst with a Ti/Si ratio of 9/1 reaches 1.74 dL/g, with the Mn of 7.72 × 104 g/mol. The hydrolysis resistance stability of the titania-silica composite aerogel is greatly improved compared with traditional tetrabutyl titanate (TBT), and the end carboxyl group content of PBS is effectively reduced to lower than 30 mol/ton.
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Affiliation(s)
- Wenqi Zou
- Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
- Beijing Center for Physical and Chemical Analysis, Institute of Analysis and Testing, Beijing Academy of Science and Technology, Beijing 100089, China
| | - Hongli Bian
- Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
| | - Jinjing Guo
- Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
| | - Jun Xu
- Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
| | - Baohua Guo
- Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
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3
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Zhang Y, Luo B, Ai C, Li J, Jing D, Ma L. MOF-Derived Non-Noble Metal CoP Nanoparticle Modified TiO 2 for Enhanced Photocatalytic Hydrogen Production. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c02304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Yiming Zhang
- International Research Center for Renewable Energy, State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an710049, China
| | - Bing Luo
- School of Chemical Engineering and Technology, Xi’an Jiaotong University, Xi’an710049, China
| | - Chaoqian Ai
- International Research Center for Renewable Energy, State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an710049, China
| | - Jinghua Li
- International Research Center for Renewable Energy, State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an710049, China
| | - Dengwei Jing
- International Research Center for Renewable Energy, State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an710049, China
| | - Lijing Ma
- International Research Center for Renewable Energy, State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an710049, China
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4
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Shi X, Fan X, Zhu Y, Liu Y, Wu P, Jiang R, Wu B, Wu HA, Zheng H, Wang J, Ji X, Chen Y, Liang J. Pushing detectability and sensitivity for subtle force to new limits with shrinkable nanochannel structured aerogel. Nat Commun 2022; 13:1119. [PMID: 35236851 PMCID: PMC8891261 DOI: 10.1038/s41467-022-28760-4] [Citation(s) in RCA: 38] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Accepted: 02/04/2022] [Indexed: 11/09/2022] Open
Abstract
There is an urgent need for developing electromechanical sensor with both ultralow detection limits and ultrahigh sensitivity to promote the progress of intelligent technology. Here we propose a strategy for fabricating a soft polysiloxane crosslinked MXene aerogel with multilevel nanochannels inside its cellular walls for ultrasensitive pressure detection. The easily shrinkable nanochannels and optimized material synergism endow the piezoresistive aerogel with an ultralow Young's modulus (140 Pa), numerous variable conductive pathways, and mechanical robustness. This aerogel can detect extremely subtle pressure signals of 0.0063 Pa, deliver a high pressure sensitivity over 1900 kPa-1, and exhibit extraordinarily sensing robustness. These sensing properties make the MXene aerogel feasible for monitoring ultra-weak force signals arising from a human's deep-lying internal jugular venous pulses in a non-invasive manner, detecting the dynamic impacts associated with the landing and take-off of a mosquito, and performing static pressure mapping of a hair.
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Affiliation(s)
- Xinlei Shi
- School of Materials Science and Engineering, National Institute for Advanced Materials, Nankai University, 300350, Tianjin, China
| | - Xiangqian Fan
- School of Materials Science and Engineering, National Institute for Advanced Materials, Nankai University, 300350, Tianjin, China
| | - Yinbo Zhu
- CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Modern Mechanics, CAS Center for Excellence in Complex System Mechanics, University of Science and Technology of China, 230027, Hefei, China
| | - Yang Liu
- School of Materials Science and Engineering, National Institute for Advanced Materials, Nankai University, 300350, Tianjin, China
| | - Peiqi Wu
- School of Materials Science and Engineering, National Institute for Advanced Materials, Nankai University, 300350, Tianjin, China
| | - Renhui Jiang
- School of Physics and Technology, Center for Electron Microscopy, MOE Key Laboratory of Artificial Micro- and Nano-structures, and Institute for Advanced Studies, Wuhan University, 430072, Wuhan, China
| | - Bao Wu
- CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Modern Mechanics, CAS Center for Excellence in Complex System Mechanics, University of Science and Technology of China, 230027, Hefei, China
| | - Heng-An Wu
- CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Modern Mechanics, CAS Center for Excellence in Complex System Mechanics, University of Science and Technology of China, 230027, Hefei, China
| | - He Zheng
- School of Physics and Technology, Center for Electron Microscopy, MOE Key Laboratory of Artificial Micro- and Nano-structures, and Institute for Advanced Studies, Wuhan University, 430072, Wuhan, China
| | - Jianbo Wang
- School of Physics and Technology, Center for Electron Microscopy, MOE Key Laboratory of Artificial Micro- and Nano-structures, and Institute for Advanced Studies, Wuhan University, 430072, Wuhan, China
| | - Xinyi Ji
- School of Materials Science and Engineering, National Institute for Advanced Materials, Nankai University, 300350, Tianjin, China
| | - Yongsheng Chen
- Key Laboratory of Functional Polymer Materials of Ministry of Education, College of Chemistry, Nankai University, 300350, Tianjin, China.
| | - Jiajie Liang
- School of Materials Science and Engineering, National Institute for Advanced Materials, Nankai University, 300350, Tianjin, China. .,Key Laboratory of Functional Polymer Materials of Ministry of Education, College of Chemistry, Nankai University, 300350, Tianjin, China. .,Tianjin Key Laboratory of Metal and Molecule-Based Material Chemistry and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, 300350, Tianjin, China.
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5
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A Kinetic Study of Photocatalytic Degradation of Phenol over Titania–Silica Mixed Oxide Materials under UV Illumination. Catalysts 2022. [DOI: 10.3390/catal12020193] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
A set of titania–silica mixed oxide materials were prepared by a cosolvent-induced gelation method using ethanol and toluene as solvent and cosolvent, respectively. These materials were extensively characterized by utilizing several characterization techniques and assessed for phenol degradation under UV illumination. The degradation of phenol follows first-order kinetics, and fragmented products formed during the phenol degradation were qualitatively identified by using high performance liquid Chromatographic (HPLC) and atomic pressure chemical ionization mass spectroscopic (APCI-MS) techniques. The complete mineralization of phenol was further evidenced by the measurement of the total organic contents that remained in the solution after irradiation. The pore diameter of the materials was found to be the key factor for phenol degradation, whereas surface area and pore volume play a role among the mixed oxide materials. In addition, in the mixed oxide system there was an inverse correlation obtained with the particle size of the materials and the degradation efficiency. The smaller particle size of titania in the mixed oxide material was found to be a requirement for an effective degradation of phenol.
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In-Situ Fabricating Ag Nanoparticles on TiO2 for Unprecedented High Catalytic Activity of 4-Nitrophenol Reduction. Catal Letters 2021. [DOI: 10.1007/s10562-021-03671-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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7
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Kim HJ, Lee JH, Lee MW, Seo Y, Choung JW, Kim CH, Lee KY. SiO@Pd@CeO catalyst with improved thermal stability: Effect of interaction between Pd and CeO on activity for CO oxidation. MOLECULAR CATALYSIS 2020. [DOI: 10.1016/j.mcat.2020.111014] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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8
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Samanta S, Kumar S, Battula VR, Jaryal A, Sardana N, Kailasam K. Quantum dot-sensitized O-linked heptazine polymer photocatalyst for the metal-free visible light hydrogen generation. RSC Adv 2020; 10:29633-29641. [PMID: 35518248 PMCID: PMC9056167 DOI: 10.1039/d0ra03773g] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Accepted: 07/23/2020] [Indexed: 12/16/2022] Open
Abstract
Metal-free organic polymer photocatalysts have attracted dramatic attention in the field of visible light-induced hydrogen evolution reaction (HER). Herein, we showed a polymeric O-linked heptazine polymer (OLHP) decorated with S, N co-doped graphene quantum dots (S,N-GQDs) as a photosensitizer to generate hydrogen upon quantum dot sensitization. Both of these heptazine-based systems show effective photosensitization with strong π–π interactions and enhanced photocatalytic H2 generation (24 times) as metal-free systems. Electrochemical impedance and optical measurements show effective charge transfer kinetics with decreased charge recombination, which is responsible for the enhanced photocatalytic activity. As a result, a significant high apparent quantum yield (AQY) with highest value of 10.2% was obtained for our photocatalyst OLHP/S,N-GQD10. A polymeric O-linked heptazine polymer (OLHP) decorated with S, N co-doped graphene quantum dots (S,N-GQDs) as a photosensitizer to utilize visible light (λ > 420 nm) for hydrogen generation.![]()
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Affiliation(s)
- Soumadri Samanta
- Advanced Functional Nanomaterials
- Energy and Environment Unit
- Institute of Nano Science and Technology (INST)
- Mohali 160062
- India
| | - Sunil Kumar
- Advanced Functional Nanomaterials
- Energy and Environment Unit
- Institute of Nano Science and Technology (INST)
- Mohali 160062
- India
| | - V. R. Battula
- Advanced Functional Nanomaterials
- Energy and Environment Unit
- Institute of Nano Science and Technology (INST)
- Mohali 160062
- India
| | - Arpna Jaryal
- Advanced Functional Nanomaterials
- Energy and Environment Unit
- Institute of Nano Science and Technology (INST)
- Mohali 160062
- India
| | - Neha Sardana
- Advanced Functional Nanomaterials
- Energy and Environment Unit
- Institute of Nano Science and Technology (INST)
- Mohali 160062
- India
| | - Kamalakannan Kailasam
- Advanced Functional Nanomaterials
- Energy and Environment Unit
- Institute of Nano Science and Technology (INST)
- Mohali 160062
- India
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9
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Zhang W, Zhang Y, Yang K, Yang Y, Jia J, Guo L. Photocatalytic Performance of SiO 2/CNOs/TiO 2 to Accelerate the Degradation of Rhodamine B under Visible Light. NANOMATERIALS 2019; 9:nano9121671. [PMID: 31771112 PMCID: PMC6955674 DOI: 10.3390/nano9121671] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/20/2019] [Revised: 11/12/2019] [Accepted: 11/18/2019] [Indexed: 01/18/2023]
Abstract
A silicon dioxide/carbon nano onions/titanium dioxide (SiO2/CNOs/TiO2) composite was synthesized by a simple sol-gel method and characterized by the methods of X-ray diffraction (XRD), scanning electronic microscope (SEM), X-ray photoelectron spectroscopy (XPS), Brunauer–Emmett–Teller (BET), Fourier transform infrared (FTIR), thermogravimetric analysis (TG), differential scanning calorimeter (DSC) and UV-Vis diffuse reflectance spectra (UV-Vis DRS). In this work, the photocatalytic activity of the SiO2/CNOs/TiO2 photocatalyst was assessed by testing the degradation rate of Rhodamine B (RhB) under visible light. The results indicated that the samples exhibited the best photocatalytic activity when the composite consisted of 3% CNOs and the optimum dosage of SiO2/CNOs/TiO2(3%) was 1.5 g/L as evidenced by the highest RhB degradation rate (96%). The SiO2/CNOs/TiO2 composite greatly improved the quantum efficiency of TiO2. This work provides a new option for the modification of subsequent nanocomposite oxide nanoparticles.
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Affiliation(s)
- Weike Zhang
- School of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China; (Y.Z.); (J.J.); (L.G.)
- Correspondence: (W.Z.); (Y.Y.)
| | - Yanrong Zhang
- School of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China; (Y.Z.); (J.J.); (L.G.)
| | - Kai Yang
- Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China;
| | - Yanqing Yang
- School of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China; (Y.Z.); (J.J.); (L.G.)
- Correspondence: (W.Z.); (Y.Y.)
| | - Jia Jia
- School of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China; (Y.Z.); (J.J.); (L.G.)
| | - Lijun Guo
- School of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China; (Y.Z.); (J.J.); (L.G.)
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10
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Zhou Q, Yin H, Wang A, Si Y. Preparation of hollow B–SiO2@TiO2 composites and their photocatalytic performances for degradation of ammonia-nitrogen and green algae in aqueous solution. Chin J Chem Eng 2019. [DOI: 10.1016/j.cjche.2019.01.036] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
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11
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Zou H, Wang L, Tao H, Liu Y, Chang M, Yao S. Preparation of SiO 2@TiO 2:Eu 3+@TiO 2 core double-shell microspheres for photodegradation of polyacrylamide. RSC Adv 2019; 9:30790-30796. [PMID: 35529367 PMCID: PMC9072158 DOI: 10.1039/c9ra06187h] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Accepted: 09/20/2019] [Indexed: 01/23/2023] Open
Abstract
Recently, polyacrylamide (PAM) has been widely used in polymer flooding technology to enhance oil recovery and oil production. However, the difficulty in removing hydrolysed PAM (HPAM) from wastewater still seriously blocks the further application of polymer flooding in the oilfields. Herein, we demonstrate the preparation of SiO2@TiO2:Eu3+@TiO2 core double-shell microspheres (STT) through a two-step solvothermal and sol–gel coating strategy. The as-prepared STT exhibits an ideal photocatalytic activity for the photodegradation of HPAM. More importantly, by using STT as the model, the correlation between fluorescence intensity and photocatalytic activity of the photocatalysts is investigated. The results suggest their oppositional relationship. Since many kinds of photocatalysts are utilized in the degradation of organic pollutants, it is believed that our work will not only promote the development of photocatalysis in the field of oil extraction, but also offer a convenient method for evaluating the photocatalytic activity of the photocatalysts. SiO2@TiO2:Eu3+@TiO2 core double-shell microspheres with an ideal photocatalytic activity are designed and prepared for photodegradation of HPAM.![]()
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Affiliation(s)
- Haoyang Zou
- State Key Laboratory of Supramolecular Structure and Materials, Jilin University Changchun 130012 P. R. China
| | - Lan Wang
- Research Institute of Drilling and Production Engineering Technology, CNPC Chuanqing Drilling Engineering Co., Ltd Guanghan 618300 P. R. China
| | - Huaizhi Tao
- Research Institute of Drilling and Production Engineering Technology, CNPC Chuanqing Drilling Engineering Co., Ltd Guanghan 618300 P. R. China
| | - Yi Liu
- State Key Laboratory of Supramolecular Structure and Materials, Jilin University Changchun 130012 P. R. China
| | - Meiqi Chang
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences Shanghai 200050 P. R. China
| | - Shiyu Yao
- College of Physics, Jilin University Changchun 130012 P. R. China
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12
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Zhang Y, Shan G, Dong F, Wang C, Zhu L. Glass fiber supported BiOI thin-film fixed-bed photocatalytic reactor for water decontamination under solar light irradiation. J Environ Sci (China) 2019; 80:277-286. [PMID: 30952345 DOI: 10.1016/j.jes.2019.01.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2018] [Revised: 01/05/2019] [Accepted: 01/07/2019] [Indexed: 06/09/2023]
Abstract
BiOI powder has been proved to be an efficient photocatalyst, but the difficulty in removing it from water after reaction limits its application in real water treatment. To solve this problem, a thin-film fixed-bed reactor (TFFBR) was set-up by developing a BiOI thin film on glass fiber cloth (GFC). The composition and structure of the as-prepared films were characterized with X-ray diffraction, X-ray photoelectron spectroscopy, field emission microscopy, transmission electron microscopy and Fourier transform infrared spectroscopy. The BiOI thin film was made by painting a silica sol containing BiOI on GFC, which could be tailored to desired sizes to accommodate the TFFBR. The mass of BiOI on the GFC increased with the number of iterations of the painting process. SiO2 sol glued the BiOI particles tightly onto the GFC, making the thin film strong enough to resist fluid flushing in the TFFBR. The photocatalytic activity of the BiOI thin film was investigated by degrading bisphenol A (BPA) under simulated sunlight. Ninety eight percent of BPA (20 mg/L in 2 L) was degraded by the BiOI thin film sample of seven layers (GFC-7) on the TFFBR within 8 hr irradiation. The GFC-7 displayed good photocatalytic ability toward artificial sewage containing BPA in a wide pH range (5-9), and also demonstrated excellent durability and reusability. The working conditions were optimized and it was found that the thickness of the fluid film and residence time over the thin film were key factors affecting the photocatalytic efficiency.
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Affiliation(s)
- Yonghua Zhang
- Ministry of Education, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Guoqiang Shan
- Ministry of Education, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Fengfeng Dong
- Ministry of Education, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Chenshuai Wang
- Ministry of Education, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Lingyan Zhu
- Ministry of Education, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China.
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13
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Ruirui Liu, Wang J, Zhao Y, Ji Z, Zhang J. One-pot Synthesis of Ag–TiO2–Sepiolite Nanocomposites with Excellent Antibacterial Activity. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2019. [DOI: 10.1134/s0036024419030166] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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14
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Li W, Elzatahry A, Aldhayan D, Zhao D. Core-shell structured titanium dioxide nanomaterials for solar energy utilization. Chem Soc Rev 2018; 47:8203-8237. [PMID: 30137079 DOI: 10.1039/c8cs00443a] [Citation(s) in RCA: 115] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Because of its unmatched resource potential, solar energy utilization currently is one of the hottest research areas. Much effort has been devoted to developing advanced materials for converting solar energy into electricity, solar fuels, active chemicals, or heat. Among them, TiO2 nanomaterials have attracted much attention due to their unique properties such as low cost, nontoxicity, good stability and excellent optical and electrical properties. Great progress has been made, but research opportunities are still present for creating new nanostructured TiO2 materials. Core-shell structured nanomaterials are of great interest as they provide a platform to integrate multiple components into a functional system, showing improved or new physical and chemical properties, which are unavailable from the isolated components. Consequently, significant effort is underway to design, fabricate and evaluate core-shell structured TiO2 nanomaterials for solar energy utilization to overcome the remaining challenges, for example, insufficient light absorption and low quantum efficiency. This review strives to provide a comprehensive overview of major advances in the synthesis of core-shell structured TiO2 nanomaterials for solar energy utilization. This review starts from the general protocols to construct core-shell structured TiO2 nanomaterials, and then discusses their applications in photocatalysis, water splitting, photocatalytic CO2 reduction, solar cells and photothermal conversion. Finally, we conclude with an outlook section to offer some insights on the future directions and prospects of core-shell structured TiO2 nanomaterials and solar energy conversion.
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Affiliation(s)
- Wei Li
- Department of Chemistry, Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, iChEM and State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai 200433, P. R. China.
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15
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Synthesis and characterization of Ce-SBA-15 supported cesium catalysts and their catalytic performance for synthesizing methyl acrylate. REACTION KINETICS MECHANISMS AND CATALYSIS 2018. [DOI: 10.1007/s11144-018-1419-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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16
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Kapridaki C, Verganelaki A, Dimitriadou P, Maravelaki-Kalaitzaki P. Conservation of Monuments by a Three-Layered Compatible Treatment of TEOS-Nano-Calcium Oxalate Consolidant and TEOS-PDMS-TiO₂ Hydrophobic/Photoactive Hybrid Nanomaterials. MATERIALS (BASEL, SWITZERLAND) 2018; 11:E684. [PMID: 29702571 PMCID: PMC5978061 DOI: 10.3390/ma11050684] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Revised: 04/16/2018] [Accepted: 04/25/2018] [Indexed: 11/29/2022]
Abstract
In the conservation of monuments, research on innovative nanocomposites with strengthening, hydrophobic and self-cleaning properties have attracted the interest of the scientific community and promising results have been obtained as a result. In this study, stemming from the need for the compatibility of treatments in terms of nanocomposite/substrate, a three-layered compatible treatment providing strengthening, hydrophobic, and self-cleaning properties is proposed. This conservation approach was implemented treating lithotypes and mortars of different porosity and petrographic characteristics with a three-layered treatment comprising: (a) a consolidant, tetraethoxysilane (TEOS)-nano-Calcium Oxalate; (b) a hydrophobic layer of TEOS-polydimethylsiloxane (PDMS); and (c) a self-cleaning layer of TiO₂ nanoparticles from titanium tetra-isopropoxide with oxalic acid as hole-scavenger. After the three-layered treatment, the surface hydrophobicity was improved due to PDMS and nano-TiO₂ in the interface substrate/atmosphere, as proven by the homogeneity and the Si⁻O⁻Ti hetero-linkages of the blend protective/self-cleaning layers observed by Scanning Electron Microscope (SEM), Transmission Electron Microscope (TEM) and Fourier-Transform Infrared Spectroscopy (FTIR). The aesthetic, microstructural, mechanical and permeabile compatibility of the majority of treated substrates ranged within acceptability limits. The improved photocatalytic activity, as proven by the total discoloration of methylene blue in the majority of cases, was attributed to the anchorage of TiO₂, through the Si⁻O⁻Ti bonds to SiO₂, in the interface with the atmosphere, thus enhancing photoactivation.
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Affiliation(s)
- Chrysi Kapridaki
- School of Architecture, Technical University of Crete, Polytechnioupolis, Akrotiri, 73100 Chania, Crete, Greece.
| | - Anastasia Verganelaki
- School of Architecture, Technical University of Crete, Polytechnioupolis, Akrotiri, 73100 Chania, Crete, Greece.
| | - Pipina Dimitriadou
- School of Architecture, Technical University of Crete, Polytechnioupolis, Akrotiri, 73100 Chania, Crete, Greece.
| | - Pagona Maravelaki-Kalaitzaki
- School of Architecture, Technical University of Crete, Polytechnioupolis, Akrotiri, 73100 Chania, Crete, Greece.
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18
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Duan Y, Zhai D, Zhang X, Zheng J, Li C. Synthesis of CuO/Ti-MCM-48 Photocatalyst for the Degradation of Organic Pollutions Under Solar-Simulated Irradiation. Catal Letters 2017. [DOI: 10.1007/s10562-017-2258-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Chang M, Song Y, Sheng Y, Chen J, Zou H. Understanding the remarkable luminescence enhancement via SiO2 coating on TiO2:Eu3+ nanofibers. Phys Chem Chem Phys 2017. [DOI: 10.1039/c7cp01113j] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Red luminescence is enhanced by coating an SiO2 layer on TiO2:Eu3+ nanofibers, and the luminescence enhancement mechanism is discussed.
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Affiliation(s)
- Meiqi Chang
- College of Chemistry
- Jilin University
- Changchun 130012
- P. R. China
| | - Yanhua Song
- College of Chemistry
- Jilin University
- Changchun 130012
- P. R. China
| | - Ye Sheng
- College of Chemistry
- Jilin University
- Changchun 130012
- P. R. China
| | - Jie Chen
- College of Chemistry
- Jilin University
- Changchun 130012
- P. R. China
| | - Haifeng Zou
- College of Chemistry
- Jilin University
- Changchun 130012
- P. R. China
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Wang Y, Huang H, Li G, Zhao X, Yu L, Zou C, Xu Y. Electrospun TiO2–SiO2 fibres with hierarchical pores from phase separation. CrystEngComm 2017. [DOI: 10.1039/c7ce00471k] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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21
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Wang Y, Yang X, Peng H, Wang F, Liu X, Yang Y, Hao J. Layer-by-Layer Assembly of Multifunctional Flame Retardant Based on Brucite, 3-Aminopropyltriethoxysilane, and Alginate and Its Applications in Ethylene-Vinyl Acetate Resin. ACS APPLIED MATERIALS & INTERFACES 2016; 8:9925-9935. [PMID: 27002922 DOI: 10.1021/acsami.6b00998] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
An efficient and multifunctional brucite/3-aminopropyltriethoxysilane (APTES)/nickel alginate/APTES (B/A/Nia/A) hybrid flame retardant was fabricated via the layer-by-layer assembly technique with brucite, silane coupling agents, nickel chloride, and sodium alginate. The morphology, chemical composition, and structure of the hybrid flame retardant were characterized. The results confirmed the multilayer structure and indicated that the assembled driving forces were electrostatic interactions, dehydration condensation, hydrogen bonds, and coordination bonds. When used in ethylene-vinyl acetate (EVA) resin, the multifunctional flame retardant had better performance than brucite in improving the flame retardancy, smoke suppression, and mechanical properties. With 130 phr loading, the multifunctional flame retardant achieved a limiting oxygen index value of 32.3% and a UL 94 V-0 rating, whereas the brucite achieved only 31.1% and a V-2 rating, respectively. The peak heat release rate and total heat released decreased by 41.5% and 8.9%, respectively. The multifunctional flame retardant had an excellent performance in reducing the smoke, CO, and CO2 production rates. These improvements could be attributed to the catalyzing carbonization of nickel compounds and the formation of more protective char layers. Moreover, the elongation at break increased by 97.5%, which benefited from the improved compatibility and the sacrificial bonds in the nickel alginate. The mechanism of flame retardant, smoke suppression, and toughening is proposed.
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Affiliation(s)
- Yiliang Wang
- National Engineering Technology Research Center of Flame Retardant Materials, School of Materials Science and Engineering, Beijing Institute of Technology , Beijing 100081, PR China
| | - Xiaomei Yang
- National Engineering Technology Research Center of Flame Retardant Materials, School of Materials Science and Engineering, Beijing Institute of Technology , Beijing 100081, PR China
| | - Hui Peng
- National Engineering Technology Research Center of Flame Retardant Materials, School of Materials Science and Engineering, Beijing Institute of Technology , Beijing 100081, PR China
| | - Fang Wang
- National Engineering Technology Research Center of Flame Retardant Materials, School of Materials Science and Engineering, Beijing Institute of Technology , Beijing 100081, PR China
| | - Xiu Liu
- National Engineering Technology Research Center of Flame Retardant Materials, School of Materials Science and Engineering, Beijing Institute of Technology , Beijing 100081, PR China
| | - Yunguo Yang
- National Engineering Technology Research Center of Flame Retardant Materials, School of Materials Science and Engineering, Beijing Institute of Technology , Beijing 100081, PR China
| | - Jianwei Hao
- National Engineering Technology Research Center of Flame Retardant Materials, School of Materials Science and Engineering, Beijing Institute of Technology , Beijing 100081, PR China
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22
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Peng R, Shrestha K, Mishra G, Baltrusaitis J, Wu CM, Koodali RT. Efficient photocatalytic hydrogen evolution system by assembling earth abundant NixOy nanoclusters in cubic MCM-48 mesoporous materials. RSC Adv 2016. [DOI: 10.1039/c6ra09126a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A MCM-48 mesoporous support containing NiO and Ni2O3 nanoclusters exhibit high activity for photocatalytic hydrogen production in comparison to NiO.
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Affiliation(s)
- Rui Peng
- Department of Chemistry
- University of South Dakota
- Vermillion
- USA
| | - Khadga Shrestha
- Department of Chemistry
- University of South Dakota
- Vermillion
- USA
| | | | | | - Chia-Ming Wu
- Department of Chemistry
- University of South Dakota
- Vermillion
- USA
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Rico-Santacruz M, Serrano E, Marcì G, García-López EI, García-Martínez J. Titania-Silica Materials for Enhanced Photocatalysis. Chemistry 2015; 21:18338-44. [PMID: 26503306 DOI: 10.1002/chem.201502569] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2015] [Indexed: 11/12/2022]
Abstract
Mesoporous titania-organosilica nanoparticles comprised of anatase nanocrystals crosslinked with organosilica moieties have been prepared by direct co-condensation of a titania precursor, tetrabuthylortotitanate (TBOT), with two organosilica precursors, 1,4-bis(triethoxysilyl) benzene (BTEB) and 1,2-bis(triethoxysilyl) ethane (BTEE), in mild conditions and in the absence of surfactant. These hybrid materials show both high surface areas (200-360 m(2) g(-1) ) and pore volumes (0.3 cm(3) g(-1) ) even after calcination, and excellent photoactivity in the degradation of rhodamine 6G and in the partial oxidation of propene under UV irradiation, especially after the calcination of the samples. During calcination, there is a change in the Ti(IV) coordination and an increase in the content of SiOTi moieties in comparison with the uncalcined materials, which seems to be responsible for the enhanced photocatalytic activity of hybrid titania-silica materials as compared to both uncalcined samples and the control TiO2 .
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Affiliation(s)
- Marisa Rico-Santacruz
- Molecular Nanotechnology Laboratory, Department of Inorganic Chemistry, University of Alicante, Carretera San Vicente s/n, 03690 Alicante (Spain) www.nanomol.es.,Current adress: ICPEES - ECPM, 25 rue Becquerel, 67087 Strasbourg Cedex 2 (France)
| | - Elena Serrano
- Molecular Nanotechnology Laboratory, Department of Inorganic Chemistry, University of Alicante, Carretera San Vicente s/n, 03690 Alicante (Spain) www.nanomol.es
| | - Giuseppe Marcì
- "Schiavello-Grillone" Photocatalysis Group, Dipartimento di Energia, Ingegneria dell'informazione e modelli Matematici (DEIM), Università di Palermo, Viale delle Scienze, 90128 Palermo (Italy)
| | - Elisa I García-López
- "Schiavello-Grillone" Photocatalysis Group, Dipartimento di Energia, Ingegneria dell'informazione e modelli Matematici (DEIM), Università di Palermo, Viale delle Scienze, 90128 Palermo (Italy)
| | - Javier García-Martínez
- Molecular Nanotechnology Laboratory, Department of Inorganic Chemistry, University of Alicante, Carretera San Vicente s/n, 03690 Alicante (Spain) www.nanomol.es.
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Yan J, Zhang C, Ning C, Tang Y, Zhang Y, Chen L, Gao S, Wang Z, Zhang W. Vapor phase condensation of methyl acetate with formaldehyde to preparing methyl acrylate over cesium supported SBA-15 catalyst. J IND ENG CHEM 2015. [DOI: 10.1016/j.jiec.2014.11.014] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Rasalingam S, Wu CM, Koodali RT. Modulation of pore sizes of titanium dioxide photocatalysts by a facile template free hydrothermal synthesis method: implications for photocatalytic degradation of rhodamine B. ACS APPLIED MATERIALS & INTERFACES 2015; 7:4368-4380. [PMID: 25633643 DOI: 10.1021/am508883f] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Mesoporous TiO2 photocatalysts were prepared in ethanol media by using relatively green, template free sol-gel technique. A mild hydrothermal treatment procedure was employed to tune the pore sizes of the materials. Comprehensive techniques that include powder X-ray diffraction, diffuse reflectance spectroscopy, specific surface area analysis, electron microscopy, FT-IR, TGA, and ζ-potential measurements were used to characterize the titania materials. Porosity (pore size and pore volume) of the materials were found to be key factors for the variation in the rate of photocatalytic degradation of rhodamine B; in addition to specific surface area, and surface hydroxyl groups. An increase in porosity permits effective transport of the dye molecules resulting in an increase in the rate of the degradation in materials having larger pores. A detailed electrospray ionization-mass spectrometric (ESI-MS) study was carried out for selected materials to identify photodegraded intermediates and products formed during the degradation of rhodamine B. In addition, experiments were also carried out to understand the role of reactive oxygen species (ROS). In summary, this work provides a simple way to tune pore sizes without the use of any template and an insight into the influence of pore size for the photocatalytic degradation of rhodamine B.
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Affiliation(s)
- Shivatharsiny Rasalingam
- Department of Chemistry, University of South Dakota , Vermillion, South Dakota 57069, United States
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