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Ruan X, Li S, Huang C, Zheng W, Cui X, Ravi SK. Catalyzing Artificial Photosynthesis with TiO 2 Heterostructures and Hybrids: Emerging Trends in a Classical yet Contemporary Photocatalyst. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2305285. [PMID: 37818725 DOI: 10.1002/adma.202305285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Revised: 09/21/2023] [Indexed: 10/13/2023]
Abstract
Titanium dioxide (TiO2) stands out as a versatile transition-metal oxide with applications ranging from energy conversion/storage and environmental remediation to sensors and optoelectronics. While extensively researched for these emerging applications, TiO2 has also achieved commercial success in various fields including paints, inks, pharmaceuticals, food additives, and advanced medicine. Thanks to the tunability of their structural, morphological, optical, and electronic characteristics, TiO2 nanomaterials are among the most researched engineering materials. Besides these inherent advantages, the low cost, low toxicity, and biocompatibility of TiO2 nanomaterials position them as a sustainable choice of functional materials for energy conversion. Although TiO2 is a classical photocatalyst well-known for its structural stability and high surface activity, TiO2-based photocatalysis is still an active area of research particularly in the context of catalyzing artificial photosynthesis. This review provides a comprehensive overview of the latest developments and emerging trends in TiO2 heterostructures and hybrids for artificial photosynthesis. It begins by discussing the common synthesis methods for TiO2 nanomaterials, including hydrothermal synthesis and sol-gel synthesis. It then delves into TiO2 nanomaterials and their photocatalytic mechanisms, highlighting the key advancements that have been made in recent years. The strategies to enhance the photocatalytic efficiency of TiO2, including surface modification, doping modulation, heterojunction construction, and synergy of composite materials, with a specific emphasis on their applications in artificial photosynthesis, are discussed. TiO2-based heterostructures and hybrids present exciting opportunities for catalyzing solar fuel production, organic degradation, and CO2 reduction via artificial photosynthesis. This review offers an overview of the latest trends and advancements, while also highlighting the ongoing challenges and prospects for future developments in this classical yet rapidly evolving field.
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Affiliation(s)
- Xiaowen Ruan
- School of Energy and Environment, City Universitsy of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR, China
| | - Shijie Li
- State Key Laboratory of Automotive Simulation and Control, School of Materials Science and Engineering, Key Laboratory of Automobile Materials of MOE, Jilin University, Changchun, 130012, China
| | - Chengxiang Huang
- State Key Laboratory of Automotive Simulation and Control, School of Materials Science and Engineering, Key Laboratory of Automobile Materials of MOE, Jilin University, Changchun, 130012, China
| | - Weitao Zheng
- State Key Laboratory of Automotive Simulation and Control, School of Materials Science and Engineering, Key Laboratory of Automobile Materials of MOE, Jilin University, Changchun, 130012, China
| | - Xiaoqiang Cui
- State Key Laboratory of Automotive Simulation and Control, School of Materials Science and Engineering, Key Laboratory of Automobile Materials of MOE, Jilin University, Changchun, 130012, China
| | - Sai Kishore Ravi
- School of Energy and Environment, City Universitsy of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR, China
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Ma J, Xie W, Li J, Yang H, Wu L, Zou Y, Deng Y. Micellar Nanoreactors Enabled Site-Selective Decoration of Pt Nanoparticles Functionalized Mesoporous SiO 2 /WO 3-x Composites for Improved CO Sensing. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2301011. [PMID: 37066705 DOI: 10.1002/smll.202301011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2023] [Revised: 03/20/2023] [Indexed: 06/19/2023]
Abstract
Site-selective and partial decoration of supported metal nanoparticles (NPs) with transition metal oxides (e.g., FeOx ) can remarkably improve its catalytic performance and maintain the functions of the carrier. However, it is challenging to selectively deposit transition metal oxides on the metal NPs embedded in the mesopores of supporting matrix through conventional deposition method. Herein, a restricted in situ site-selective modification strategy utilizing poly(ethylene oxide)-block-polystyrene (PEO-b-PS) micellar nanoreactors is proposed to overcome such an obstacle. The PEO shell of PEO-b-PS micelles interacts with the hydrolyzed tungsten salts and silica precursors, while the hydrophobic organoplatinum complex and ferrocene are confined in the hydrophobic PS core. The thermal treatment leads to mesoporous SiO2 /WO3-x framework, and meanwhile FeOx nanolayers are in situ partially deposited on the supported Pt NPs due to the strong metal-support interaction between FeOx and Pt. The selective modification of Pt NPs with FeOx makes the Pt NPs present an electron-deficient state, which promotes the mobility of CO and activates the oxidation of CO. Therefore, mesoporous SiO2 /WO3-x -FeOx /Pt based gas sensors show a high sensitivity (31 ± 2 in 50 ppm of CO), excellent selectivity, and fast response time (3.6 s to 25 ppm) to CO gas at low operating temperature (66 °C, 74% relative humidity).
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Affiliation(s)
- Junhao Ma
- Department of Chemistry, Department of Gastroenterology and Hepatology, State Key Laboratory of Molecular Engineering of Polymers, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, State Key Lab of Transducer Technology, Zhongshan Hospital, iChEM, Fudan University, Shanghai, 200433, P. R. China
| | - Wenhe Xie
- Department of Chemistry, Department of Gastroenterology and Hepatology, State Key Laboratory of Molecular Engineering of Polymers, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, State Key Lab of Transducer Technology, Zhongshan Hospital, iChEM, Fudan University, Shanghai, 200433, P. R. China
| | - Jichun Li
- Department of Chemistry, Department of Gastroenterology and Hepatology, State Key Laboratory of Molecular Engineering of Polymers, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, State Key Lab of Transducer Technology, Zhongshan Hospital, iChEM, Fudan University, Shanghai, 200433, P. R. China
| | - Haitao Yang
- School of Materials Science and Engineering, Nanchang Hangkong University, Nanchang, 330063, P. R. China
| | - Limin Wu
- Institute of Energy and Materials Chemistry, Inner Mongolia University, Hohhot, 010021, P. R. China
| | - Yidong Zou
- Department of Chemistry, Department of Gastroenterology and Hepatology, State Key Laboratory of Molecular Engineering of Polymers, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, State Key Lab of Transducer Technology, Zhongshan Hospital, iChEM, Fudan University, Shanghai, 200433, P. R. China
| | - Yonghui Deng
- Department of Chemistry, Department of Gastroenterology and Hepatology, State Key Laboratory of Molecular Engineering of Polymers, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, State Key Lab of Transducer Technology, Zhongshan Hospital, iChEM, Fudan University, Shanghai, 200433, P. R. China
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Qiao P, Zhang A, Sun R, Wang W. Simple Quaternary Templating Systems for Direct Synthesis of Unique SBA-15 Mesopore Frameworks Embedded with High-Content TiO 2 Nanoparticles as High-Performance Photocatalysts. Inorg Chem 2022; 61:13968-13980. [PMID: 35998630 DOI: 10.1021/acs.inorgchem.2c01957] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
Abstract
This work presents a simple P123-based quaternary templating system using titanyl sulfate (TS) as the TiO2 precursor and self-contained sulfuric acid as the catalyst (TS/TEOS/P123/H2O). A unique structural configuration of SBA-15-type mesopore frameworks embedded with high-content TiO2 nanoparticles can be directly obtained. Even with a high TiO2 content (29.1 wt %), well-defined mesostructures free of pore blocking can be secured. A new structural formation mechanism is unveiled: a self-assembly process between inorganic species and P123 micelles yields ordered mesostructures catalyzed by self-contained TS in the low-temperature step, while sol-gel reaction and crystallization of TS coincide with processes of mesostructural re-organization and partial evacuation of P123 from mesopores. The incorporation of high-content TiO2 nanoparticles into mesopore frameworks mainly happens during the hydrothermal treatment step. Not surprisingly, thanks to well-defined mesostructures containing high-content accessible TiO2 nanoparticles, such TiO2/SBA-15 composites show high activity and good reusability in photodegrading Rhodamine B and humic acids and photoreducing highly toxic Cr6+ in water under UV irradiation.
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Affiliation(s)
- Pengchao Qiao
- Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), School of Materials Science and Engineering, Northeastern University, Shenyang 110819, Liaoning, China
| | - Ao Zhang
- Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), School of Materials Science and Engineering, Northeastern University, Shenyang 110819, Liaoning, China
| | - Rui Sun
- Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), School of Materials Science and Engineering, Northeastern University, Shenyang 110819, Liaoning, China
| | - Wei Wang
- Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), School of Materials Science and Engineering, Northeastern University, Shenyang 110819, Liaoning, China
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Block Copolymer and Cellulose Templated Mesoporous TiO2-SiO2 Nanocomposite as Superior Photocatalyst. Catalysts 2022. [DOI: 10.3390/catal12070770] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
A dual soft-templating method was developed to produce highly crystalline and mesoporous TiO2-SiO2 nanocomposites. Pluronic F127 as the structure-directing agent and pure cellulose as the surface area modifier were used as the templating media. While Pluronic F127 served as the sacrificing media for generating a mesoporous structure in an acidic pH, cellulose templating helped to increase the specific surface area without affecting the mesoporosity of the TiO2-SiO2 nanostructures. Calcination at elevated temperature removed all the organics and formed pure inorganic TiO2-SiO2 composites as revealed by TGA and FTIR analyses. An optimum amount of SiO2 insertion in the TiO2 matrix increased the thermal stability of the crystalline anatase phase. BET surface area measurement along with low angle XRD revealed the formation of a mesoporous structure in the composites. The photocatalytic activity was evaluated by the degradation of Rhodamine B, Methylene Blue, and 4-Nitrophenol as the model pollutants under solar light irradiation, where the superior photo-degradation activity of Pluronic F127/cellulose templated TiO2-SiO2 was observed compared to pure Pluronic templated composite and commercial Evonik P25 TiO2. The higher photocatalytic activity was achieved due to the higher thermal stability of the nanocrystalline anatase phase, the mesoporosity, and the higher specific surface area.
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Zaera F. Designing Sites in Heterogeneous Catalysis: Are We Reaching Selectivities Competitive With Those of Homogeneous Catalysts? Chem Rev 2022; 122:8594-8757. [PMID: 35240777 DOI: 10.1021/acs.chemrev.1c00905] [Citation(s) in RCA: 69] [Impact Index Per Article: 34.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
A critical review of different prominent nanotechnologies adapted to catalysis is provided, with focus on how they contribute to the improvement of selectivity in heterogeneous catalysis. Ways to modify catalytic sites range from the use of the reversible or irreversible adsorption of molecular modifiers to the immobilization or tethering of homogeneous catalysts and the development of well-defined catalytic sites on solid surfaces. The latter covers methods for the dispersion of single-atom sites within solid supports as well as the use of complex nanostructures, and it includes the post-modification of materials via processes such as silylation and atomic layer deposition. All these methodologies exhibit both advantages and limitations, but all offer new avenues for the design of catalysts for specific applications. Because of the high cost of most nanotechnologies and the fact that the resulting materials may exhibit limited thermal or chemical stability, they may be best aimed at improving the selective synthesis of high value-added chemicals, to be incorporated in organic synthesis schemes, but other applications are being explored as well to address problems in energy production, for instance, and to design greener chemical processes. The details of each of these approaches are discussed, and representative examples are provided. We conclude with some general remarks on the future of this field.
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Affiliation(s)
- Francisco Zaera
- Department of Chemistry and UCR Center for Catalysis, University of California, Riverside, California 92521, United States
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6
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Shi Z, Xia L, Li G, Hu Y. Platinum nanoparticles-embedded raspberry-liked SiO 2 for the simultaneous electrochemical determination of eugenol and methyleugenol. Mikrochim Acta 2021; 188:241. [PMID: 34212233 DOI: 10.1007/s00604-021-04892-0] [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: 04/27/2021] [Accepted: 06/11/2021] [Indexed: 11/29/2022]
Abstract
Based on platinum nanoparticle-embedded raspberry-liked SiO2, a sensitive and selective electrochemical sensor was developed for simultaneous determination of eugenol (EU) and methyleugenol (MEU). Raspberry-liked SiO2 (RL-SiO2) was characterized with open pores on the surface, which can be used as a path for utilizing the inner space fully. So, platinum nanoparticles (Pt NPs) could be embedded in the inner and outer surface of RL-SiO2. As a carrier, RL-SiO2 not only avoided the agglomeration of the Pt NPs but also improved the catalytic performance. Therefore, the prepared Pt NPs@RL-SiO2/GCE exhibited excellent electrocatalytic activity for simultaneous determination of EU and MEU; the linearity ranges were 0.50 ~ 60 μmol/L for EU at a working potential of 0.65 V (vs. saturated calomel electrode) and 0.50 ~ 50 μmol/L for MEU at a working potential of 1.10 V; the detection limits were 0.12 μmol/L and 0.16 μmol/L (S/N=3); and the relative standard deviations (RSDs) were 3.2% and 4.5%, respectively. In addition, Pt NPs@RL-SiO2/GCE was successfully applied to the analysis of fish samples; the obtained recoveries were between 92.0 and 107%. Notably, the results conducted on samples were highly consistent with those obtained from high-performance liquid chromatography. It can be concluded that the study provided a simple method for simultaneous electrochemical determination of EU and MEU in fish samples. Schematic illustration of the preparation of RL-SiO2@Pt NPs/GCE for simultaneous determination of eugenol and methyleugenol in fish samples.
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Affiliation(s)
- Zhaoxia Shi
- School of Chemistry, Sun Yat-sen University, Guangzhou, 510275, China
| | - Ling Xia
- School of Chemistry, Sun Yat-sen University, Guangzhou, 510275, China
| | - Gongke Li
- School of Chemistry, Sun Yat-sen University, Guangzhou, 510275, China.
| | - Yufei Hu
- School of Chemistry, Sun Yat-sen University, Guangzhou, 510275, China.
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Zhang Z, Wang ZL, An K, Wang J, Zhang S, Song P, Bando Y, Yamauchi Y, Liu Y. Ti 3+ Tuning the Ratio of Cu + /Cu 0 in the Ultrafine Cu Nanoparticles for Boosting the Hydrogenation Reaction. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2021; 17:e2008052. [PMID: 33887101 DOI: 10.1002/smll.202008052] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Revised: 03/07/2021] [Indexed: 06/12/2023]
Abstract
Hydrogenation of diesters to diols is a vital process for chemical industry. The inexpensive Cu+ /Cu0 -based catalysts are highly active for the hydrogenation of esters, however, how to efficiently tune the ratio of Cu+ /Cu0 and stabilize the Cu+ is a great challenge. In this work, it is demonstrated that doped Ti ions can tune the ratio of Cu+ /Cu0 and stabilize the Cu+ by the TiOCu bonds in Ti-doped SiO2 supported Cu nanoparticle (Cu/Ti-SiO2 ) catalysts for the high conversion of dimethyl adipate to 1,6-hexanediol. In the synthesis of the catalysts, the Ti4+ OCu2+ bonds promote the reduction of Cu2+ to Cu+ by forming Ti3+ OV Cu+ (OV : oxygen vacancy) bonds and the amount of Ti doping can tune the ratio of Cu+ /Cu0 . In the catalytic reaction, the O vacancy activates CO in the ester by forming new Ti3+ δ OR Cu1+ δ bonds (OR : reactant oxygen), and Cu0 activates hydrogen. After the products are desorbed, the Ti3+ δ OR Cu1+ δ bonds return to the initial state of Ti3+ OV Cu+ bonds. The reversible TiOCu bonds greatly improve the activity and stability of the Cu/Ti-SiO2 catalysts. When the content of Ti is controlled at 0.4 wt%, the conversion and selectivity can reach 100% and 98.8%, respectively, and remain stable for 260 h without performance degradation.
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Affiliation(s)
- Ziyang Zhang
- Tianjin Key Laboratory of Applied Catalysis Science and Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
| | - Zhong-Li Wang
- Tianjin Key Laboratory of Applied Catalysis Science and Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
| | - Kang An
- Tianjin Key Laboratory of Applied Catalysis Science and Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
| | - Jiaming Wang
- Tianjin Key Laboratory of Applied Catalysis Science and Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
| | - Siran Zhang
- Tianjin Key Laboratory of Applied Catalysis Science and Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
| | - Pengfei Song
- Tianjin Key Laboratory of Applied Catalysis Science and Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
| | - Yoshio Bando
- Institute of Molecular Plus, Tianjin University, Tianjin, 300072, China
- School of Chemical Engineering and Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, QLD, 4072, Australia
| | - Yusuke Yamauchi
- School of Chemical Engineering and Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, QLD, 4072, Australia
- JST-ERATO Yamauchi Materials Space-Tectonics Project, International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan
| | - Yuan Liu
- Tianjin Key Laboratory of Applied Catalysis Science and Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
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Zhou S, Xie L, Zhang L, Wen L, Tang J, Zeng J, Liu T, Peng D, Yan M, Qiu B, Liang Q, Liang K, Jiang L, Kong B. Interfacial Super-Assembly of Ordered Mesoporous Silica-Alumina Heterostructure Membranes with pH-Sensitive Properties for Osmotic Energy Harvesting. ACS APPLIED MATERIALS & INTERFACES 2021; 13:8782-8793. [PMID: 33560109 DOI: 10.1021/acsami.0c21661] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Osmotic energy existing between seawater and freshwater is a potential blue energy source that can mitigate the energy crisis and environmental pollution problems. Nanofluidic devices are widely utilized to capture this blue energy owing to their unique ionic transport properties in the nanometer scale. However, with respect to nanofluidic membrane devices, high membrane inner resistance and a low power density induced by disordered pores and thick coating as well as difficulty in manufacturing still impede their real-world applications. Here, we demonstrate an interfacial super-assembly strategy that is capable of fabricating ordered mesoporous silica/macroporous alumina (MS/AAO) framework-based nanofluidic heterostructure membranes with a thin and ordered mesoporous silica layer. The presence of a mesoporous silica layer with abundant silanol and a high specific surface area endows the heterostructure membrane with a low membrane inner resistance of about 7 KΩ, excellent ion selectivity, and osmotic energy conversion ability. The power density can reach up to 4.50 W/m2 by mixing artificial seawater and river water through the membrane, which is 20 times higher than that of the conventional 2D nanofluidic membrane, and outperforms about 30% compared to other 3D porous membranes. More intriguingly, the interesting pH-sensitive osmotic energy conversion property of the MS/AAO membrane is subsequently recognized, which can realize a higher power density even in acidic or alkaline wastewater, expanding the application range, especially in practical applications. This work presents a valuable paradigm for the use of mesoporous materials in nanofluidic devices and provides a way for large-scale production of nanofluidic devices.
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Affiliation(s)
- Shan Zhou
- Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Department of Chemistry, Laboratory of Advanced Materials, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, P. R. China
| | - Lei Xie
- Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Department of Chemistry, Laboratory of Advanced Materials, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, P. R. China
| | - Liping Zhang
- Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Department of Chemistry, Laboratory of Advanced Materials, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, P. R. China
| | - Liping Wen
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Science, Beijing 100190, China
| | - Jinyao Tang
- Department of Chemistry, University of Hong Kong, Hong Kong 999077, China
| | - Jie Zeng
- Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Department of Chemistry, Laboratory of Advanced Materials, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, P. R. China
| | - Tianyi Liu
- Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Department of Chemistry, Laboratory of Advanced Materials, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, P. R. China
| | - Dening Peng
- Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Department of Chemistry, Laboratory of Advanced Materials, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, P. R. China
| | - Miao Yan
- Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Department of Chemistry, Laboratory of Advanced Materials, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, P. R. China
| | - Beilei Qiu
- Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Department of Chemistry, Laboratory of Advanced Materials, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, P. R. China
| | - Qirui Liang
- Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Department of Chemistry, Laboratory of Advanced Materials, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, P. R. China
| | - Kang Liang
- School of Chemical Engineering and Graduate School of Biomedical Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Lei Jiang
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Science, Beijing 100190, China
| | - Biao Kong
- Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Department of Chemistry, Laboratory of Advanced Materials, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, P. R. China
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Heterostructural transformation of mesoporous silica-titania hybrids. Sci Rep 2021; 11:3210. [PMID: 33547337 PMCID: PMC7864960 DOI: 10.1038/s41598-020-80584-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Accepted: 12/15/2020] [Indexed: 12/13/2022] Open
Abstract
Mesoporous silica (SBA-15 with the BJH pore size of 8 nm) containing anatase nanoparticles in the pore with two different titania contents (28 and 65 mass%), which were prepared by the infiltration of the amorphous precursor derived from tetraisopropyl orthotitanate into the pore, were heat treated in air to investigate the structural changes (both mesostructure of the SBA-15 and the phase and size of the anatase in the pore). The mesostructure of the mesoporous silica and the particle size of anatase unchanged by the heat treatment up to 800 °C. The heat treatment at the temperature higher than 1000 °C resulted in the collapse of the mesostructure and the growth of anatase nanoparticles as well as the transformation to rutile, while the transformation of anatase to rutile was suppressed especially for the sample with the lower titania content (28 mass%). The resulting mesoporous silica-anatase hybrids exhibited higher benzene adsorption capacity (adsorption from water) over those heated at lower temperature, probably due to the dehydroxylation of the silanol group on the pore surface. The photocatalytic decomposition of benzene in water by the present hybrid heated at 1100 °C was efficient as that by P25, a benchmark photocatalyst.
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10
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Song M, Lu Z, Li D. Phase transformations among TiO 2 polymorphs. NANOSCALE 2020; 12:23183-23190. [PMID: 33200764 DOI: 10.1039/d0nr06226j] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Polymorphs widely exist in nature and synthetic systems and are well known to determine material properties. Understanding phase transformation mechanisms among polymorphs enables the design of structures and tuning of phases to tailor material properties. However, current understanding is limited due to the lack of direct observations of the structural evolution at the atomic scale. Here, integrating (semi) in situ transmission electron microscopy and density functional theory, we report atomic structural evolutions of phase transformation from anatase (A) to rutile (R), brookite (B), R-phase, and TiO. Besides the consistent paths with previous reports, we discover several unreported paths, including a [001] direction and (020) plane of anatase to [100]R and (01[combining macron]1)R of rutile, respectively, ([001]A||[100]R, (020)A||(01[combining macron]1)R) and [001]A||[001]B, (020)A||(220)B. Density functional theory analysis elucidates atomic structural evolution during the processes and over 16% of Ti-O bonds break and reform during the processes with energy barriers of ∼0.7-1.0 eV per TiO2 formula unit. Under electron-beam irradiation, anatase particles transform into TiO2-R phase or TiO at high or room temperature, respectively. We also reveal the anisotropic nature of the electron-beam effect, which is seldom discussed: dependence of crystallographic orientation with respect to electron-beam irradiation direction. Understanding the atomic structural evolution sheds light on interpreting and controlling TiO2 polymorphs and intermediate structures for various applications. The revealed electron-beam effects in our work provide guidance for in situ transmission electron microscopy studies.
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Affiliation(s)
- Miao Song
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA 99352, USA.
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11
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Vatti SK, Gupta S, Raj RP, Selvam P. Periodic mesoporous titania with anatase and bronze phases – the new generation photocatalyst: synthesis, characterisation, and application in environmental remediation. NEW J CHEM 2020. [DOI: 10.1039/d0nj02457k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
A facile synthesis of mesoporous titania with a unique anatase and bronze phases is reported. The resulting material favours a slow recombination of excitons which make promise for photocatalytic degradation of famotidine and 4-chlorophenol.
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Affiliation(s)
- Surya Kumar Vatti
- National Centre for Catalysis Research and Department of Chemistry
- Indian Institute of Technology-Madras
- Chennai
- India
| | - Sanjeev Gupta
- National Centre for Catalysis Research and Department of Chemistry
- Indian Institute of Technology-Madras
- Chennai
- India
| | - Rayappan Pavul Raj
- National Centre for Catalysis Research and Department of Chemistry
- Indian Institute of Technology-Madras
- Chennai
- India
| | - Parasuraman Selvam
- National Centre for Catalysis Research and Department of Chemistry
- Indian Institute of Technology-Madras
- Chennai
- India
- School of Chemical Engineering and Analytical Science
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12
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Ma J, Xiao X, Zou Y, Ren Y, Zhou X, Yang X, Cheng X, Deng Y. A General and Straightforward Route to Noble Metal-Decorated Mesoporous Transition-Metal Oxides with Enhanced Gas Sensing Performance. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2019; 15:e1904240. [PMID: 31550086 DOI: 10.1002/smll.201904240] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Indexed: 05/23/2023]
Abstract
Controllable and efficient synthesis of noble metal/transition-metal oxide (TMO) composites with tailored nanostructures and precise components is essential for their application. Herein, a general mercaptosilane-assisted one-pot coassembly approach is developed to synthesize ordered mesoporous TMOs with agglomerated-free noble metal nanoparticles, including Au/WO3 , Au/TiO2 , Au/NbOx , and Pt/WO3 . 3-mercaptopropyl trimethoxysilane is applied as a bridge agent to cohydrolyze with metal oxide precursors by alkoxysilane moieties and interact with the noble metal source (e.g., HAuCl4 and H2 PtCl4 ) by mercapto (SH) groups, resulting in coassembly with poly(ethylene oxide)-b-polystyrene. The noble metal decorated TMO materials exhibit highly ordered mesoporous structure, large pore size (≈14-20 nm), high specific surface area (61-138 m2 g-1 ), and highly dispersed noble metal (e.g., Au and Pt) nanoparticles. In the system of Au/WO3 , in situ generated SiO2 incorporation not only enhances their thermal stability but also induces the formation of ε-phase WO3 promoting gas sensing performance. Owning to its specific compositions and structure, the gas sensor based on Au/WO3 materials possess enhanced ethanol sensing performance with a good response (Rair /Rgas = 36-50 ppm of ethanol), high selectivity, and excellent low-concentration detection capability (down to 50 ppb) at low working temperature (200 °C).
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Affiliation(s)
- Junhao Ma
- Department of Chemistry, State Key Laboratory of Molecular Engineering of Polymers, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, and iChEM, Fudan University, Shanghai, 200433, China
| | - Xingyu Xiao
- Department of Chemistry, State Key Laboratory of Molecular Engineering of Polymers, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, and iChEM, Fudan University, Shanghai, 200433, China
| | - Yidong Zou
- Department of Chemistry, State Key Laboratory of Molecular Engineering of Polymers, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, and iChEM, Fudan University, Shanghai, 200433, China
| | - Yuan Ren
- Department of Chemistry, State Key Laboratory of Molecular Engineering of Polymers, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, and iChEM, Fudan University, Shanghai, 200433, China
| | - Xinran Zhou
- Department of Chemistry, State Key Laboratory of Molecular Engineering of Polymers, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, and iChEM, Fudan University, Shanghai, 200433, China
| | - Xuanyu Yang
- Department of Chemistry, State Key Laboratory of Molecular Engineering of Polymers, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, and iChEM, Fudan University, Shanghai, 200433, China
| | - Xiaowei Cheng
- Department of Chemistry, State Key Laboratory of Molecular Engineering of Polymers, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, and iChEM, Fudan University, Shanghai, 200433, China
| | - Yonghui Deng
- Department of Chemistry, State Key Laboratory of Molecular Engineering of Polymers, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, and iChEM, Fudan University, Shanghai, 200433, China
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Abstract
Although photocatalysis is an extraordinary and tremendously explored topic, there is a need to find new ways to encourage the production of composite materials that are economical, efficient and with limited environmental impact. Nanocatalysts may benefit from appropriate support material for many reasons. In this study, TiO2 was deposited on SiO2, so that the silica not only provides the macroscopic structure on which the TiO2 is formed, but it positively affects the photocatalytic activity as well. This is because of the greater specific surface area which favors the adsorption of pollutants near the photocatalyst, the higher amount of surface-adsorbed water and hydroxyl groups and the inhibition of the photogenerated electron-hole recombination. The choice of preparing the Ti-precursor starting from titanium shavings and to directly deposit TiO2 on micrometric-sized silica by a simple hydrothermal method highlights the process sustainability. The results showed that it is possible to produce a photocatalytic composite from secondary materials, exhibiting excellent photocatalytic properties, comparable to the pristine one, and opening the possibility for large-scale production.
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Yu J, Lei J, Wang L, Guillard C, Zhang J, Liu Y, Anpo M. g-C3N4 quantum dots-modified mesoporous TiO2–SiO2 for enhanced photocatalysis. RESEARCH ON CHEMICAL INTERMEDIATES 2019. [DOI: 10.1007/s11164-019-03903-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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15
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Jiang B, Iocozzia J, Zhao L, Zhang H, Harn YW, Chen Y, Lin Z. Barium titanate at the nanoscale: controlled synthesis and dielectric and ferroelectric properties. Chem Soc Rev 2019; 48:1194-1228. [PMID: 30663742 DOI: 10.1039/c8cs00583d] [Citation(s) in RCA: 98] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The current trend in the miniaturization of electronic devices has driven the investigation into many nanostructured materials. The ferroelectric material barium titanate (BaTiO3) has garnered considerable attention over the past decade owing to its excellent dielectric and ferroelectric properties. This has led to significant progress in synthetic techniques that yield high quality BaTiO3 nanocrystals (NCs) with well-defined morphologies (e.g., nanoparticles, nanorods, nanocubes and nanowires) and controlled crystal phases (e.g., cubic, tetragonal and multi-phase). The ability to produce nanoscale BaTiO3 with controlled properties enables theoretical and experimental studies on the intriguing yet complex dielectric properties of individual BaTiO3 NCs as well as BaTiO3/polymer nanocomposites. Compared with polymer-free individual BaTiO3 NCs, BaTiO3/polymer nanocomposites possess several advantages. The polymeric component enables simple solution processibility, high breakdown strength and light weight for device scalability. The BaTiO3 component enables a high dielectric constant. In this review, we highlight recent advances in the synthesis of high-quality BaTiO3 NCs via a variety of chemical approaches including organometallic, solvothermal/hydrothermal, templating, molten salt, and sol-gel methods. We also summarize the dielectric and ferroelectric properties of individual BaTiO3 NCs and devices based on BaTiO3 NCs via theoretical modeling and experimental piezoresponse force microscopy (PFM) studies. In addition, viable synthetic strategies for novel BaTiO3/polymer nanocomposites and their structure-composition-performance relationship are discussed. Lastly, a perspective on the future direction of nanostructured BaTiO3-based materials is presented.
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Affiliation(s)
- Beibei Jiang
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA.
| | - James Iocozzia
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA.
| | - Lei Zhao
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA.
| | - Hefeng Zhang
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA.
| | - Yeu-Wei Harn
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA.
| | - Yihuang Chen
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA.
| | - Zhiqun Lin
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA.
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16
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Immobilization of titanium dioxide in mesoporous silicas: Structural design and characterization. J SOLID STATE CHEM 2019. [DOI: 10.1016/j.jssc.2018.09.043] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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17
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Cuko A, Macià Escatllar A, Calatayud M, Bromley ST. Properties of hydrated TiO 2 and SiO 2 nanoclusters: dependence on size, temperature and water vapour pressure. NANOSCALE 2018; 10:21518-21532. [PMID: 30427364 DOI: 10.1039/c8nr07262k] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Nanoscale titania (TiO2) and silica (SiO2) are massively produced technologically important nanomaterials used in a wide range of technological applications where nano-titania is the active component (e.g. water splitting, pollution remediation, self-cleaning coatings). Generally, these applications entail contact with water and a degree of hydration of these nano-oxides. Although the hydration of nano-silica has been fairly well studied, the corresponding level of microscopic understanding for nano-titania is severely lacking. Here, using accurate electronic structure calculations we perform a detailed and comprehensive study of the hydration of titania nanoclusters. Firstly, using global optimisation, we establish the most energetically stable structures of a set of (TiO2)M(H2O)N nanoclusters with sizes ranging through M = 4-16 and with N/M ratios of ≤ 1.0. Using this extensive dataset we investigate how the structures, energy gaps, and thermodynamic stabilities of these species depend on size, temperature and water vapour pressure. To provide a broader chemical context for our study we also provide this full set of data for the respective set of (SiO2)M(H2O)N nanoclusters which we use to compare and contrast their properties with those of nano-titania. Our broad systematic study thus provides a comparative and foundational reference study for a thorough understanding of how hydration affects the structure, energetics and properties of both nano-SiO2 and nano-TiO2.
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Affiliation(s)
- Andi Cuko
- Departament de Ciència de Materials i Química Física & Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona, E-08028 Barcelona, Spain.
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18
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Barroso-Martín I, Moretti E, Talon A, Storaro L, Rodríguez-Castellón E, Infantes-Molina A. Au and AuCu Nanoparticles Supported on SBA-15 Ordered Mesoporous Titania-Silica as Catalysts for Methylene Blue Photodegradation. MATERIALS (BASEL, SWITZERLAND) 2018; 11:E890. [PMID: 29799498 PMCID: PMC6025472 DOI: 10.3390/ma11060890] [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: 05/02/2018] [Revised: 05/18/2018] [Accepted: 05/22/2018] [Indexed: 01/14/2023]
Abstract
The photocatalytic degradation of methylene blue (MB) dye has been performed under UV irradiation in aqueous suspension, employing photocatalysts based on Au (1.5 wt %) and AuCu (Au/Cu = 1, 2.0 wt %), and supported on SBA-15-ordered mesoporous silica, with and without titania (Si/Ti = 3), in order to evaluate the versatility of this mesoporous support in this type of reaction of great impact from the environmental point of view. Samples were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), N₂ adsorption-desorption at -196 °C, and X-ray photoelectron spectroscopy (XPS), so as to study their structural, optical, and chemical properties. All the prepared catalysts were found to be active in the test reaction. The bimetallic AuCu-based catalysts attained very high MB degradation values, in particular AuCu/SBA-15 titania-silica sample reached 100% of dye oxidation after the monitored reaction period (120 min).
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Affiliation(s)
- Isabel Barroso-Martín
- Departamento de Química Inorgánica, Cristalografía y Mineralogía (Unidad Asociada al ICP-CSIC), Facultad de Ciencias, Universidad de Málaga, Campus de Teatinos, 29071 Málaga, Spain.
| | - Elisa Moretti
- Dipartimento di Scienze Molecolari e Nanosistemi, Università Ca' Foscari Venezia, National Interuniversity Consortium of Materials Science and Technology (INSTM) Venice Research Unit, Via Torino 155/B, 30172 Mestre Venezia, Italy.
| | - Aldo Talon
- Dipartimento di Scienze Molecolari e Nanosistemi, Università Ca' Foscari Venezia, National Interuniversity Consortium of Materials Science and Technology (INSTM) Venice Research Unit, Via Torino 155/B, 30172 Mestre Venezia, Italy.
| | - Loretta Storaro
- Dipartimento di Scienze Molecolari e Nanosistemi, Università Ca' Foscari Venezia, National Interuniversity Consortium of Materials Science and Technology (INSTM) Venice Research Unit, Via Torino 155/B, 30172 Mestre Venezia, Italy.
| | - Enrique Rodríguez-Castellón
- Departamento de Química Inorgánica, Cristalografía y Mineralogía (Unidad Asociada al ICP-CSIC), Facultad de Ciencias, Universidad de Málaga, Campus de Teatinos, 29071 Málaga, Spain.
| | - Antonia Infantes-Molina
- Departamento de Química Inorgánica, Cristalografía y Mineralogía (Unidad Asociada al ICP-CSIC), Facultad de Ciencias, Universidad de Málaga, Campus de Teatinos, 29071 Málaga, Spain.
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19
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Dong C, Hu S, Xing M, Zhang J. Enhanced photocatalytic CO 2 reduction to CH 4 over separated dual co-catalysts Au and RuO 2. NANOTECHNOLOGY 2018; 29:154005. [PMID: 29406319 DOI: 10.1088/1361-6528/aaad44] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A spatially separated, dual co-catalyst photocatalytic system was constructed by the stepwise introduction of RuO2 and Au nanoparticles (NPs) at the internal and external surfaces of a three dimensional, hierarchically ordered TiO2-SiO2 (HTSO) framework (the final photocatalyst was denoted as Au/HRTSO). Characterization by HR-TEM, EDS-mapping, XRD and XPS confirmed the existence and spatially separated locations of Au and RuO2. In CO2 photocatalytic reduction (CO2PR), Au/HRTSO (0.8%) shows the optimal performance in both the activity and selectivity towards CH4; the CH4 yield is almost twice that of the singular Au/HTSO or HRTSO (0.8%, weight percentage of RuO2) counterparts. Generally, Au NPs at the external surface act as electron trapping agents and RuO2 NPs at the inner surface act as hole collectors. This advanced spatial configuration could promote charge separation and transfer efficiency, leading to enhanced CO2PR performance in both the yield and selectivity toward CH4 under simulated solar light irradiation.
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Affiliation(s)
- Chunyang Dong
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals, School of Chemistry & Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, People's Republic of China
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20
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Saptiama I, Kaneti YV, Oveisi H, Suzuki Y, Tsuchiya K, Takai K, Sakae T, Pradhan S, Hossain MSA, Fukumitsu N, Ariga K, Yamauchi Y. Molybdenum Adsorption Properties of Alumina-Embedded Mesoporous Silica for Medical Radioisotope Production. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2018. [DOI: 10.1246/bcsj.20170295] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Indra Saptiama
- International Center for Materials Nanoarchitectonics (MANA), National Institute for Material Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044
- Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8576
| | - Yusuf Valentino Kaneti
- International Center for Materials Nanoarchitectonics (MANA), National Institute for Material Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044
| | - Hamid Oveisi
- International Center for Materials Nanoarchitectonics (MANA), National Institute for Material Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044
- Department of Materials and Polymer Engineering, Hakim Sabzevari University, Sabzevar 9617976487, Iran
| | - Yoshitaka Suzuki
- Japan Atomic Energy Agency (JAEA), 4002 Narita, Oarai, Higashi-Ibaraki, Ibaraki 311-1393
| | - Kunihiko Tsuchiya
- Japan Atomic Energy Agency (JAEA), 4002 Narita, Oarai, Higashi-Ibaraki, Ibaraki 311-1393
| | - Kimiko Takai
- International Center for Materials Nanoarchitectonics (MANA), National Institute for Material Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044
| | - Takeji Sakae
- Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8576
| | - Subrata Pradhan
- Institute for Plasma Research, Gandhinagar 382 428, Gujarat, India
| | - Md. Shahriar A. Hossain
- International Center for Materials Nanoarchitectonics (MANA), National Institute for Material Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044
- Australian Institute for Innovative Materials (AIIM), University of Wollongong, Squires Way, North Wollongong, NSW 2500, Australia
| | - Nobuyoshi Fukumitsu
- Department of Radiation Oncology, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8576
| | - Katsuhiko Ariga
- International Center for Materials Nanoarchitectonics (MANA), National Institute for Material Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044
- Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa, Chiba 277-0827
| | - Yusuke Yamauchi
- Australian Institute for Innovative Materials (AIIM), University of Wollongong, Squires Way, North Wollongong, NSW 2500, Australia
- School of Chemical Engineering & Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, QLD 4072, Australia
- Department of Plant & Environmental New Resources, Kyung Hee University, 1732 Deogyeong-daero, Giheung-gu, Yongin-si, Gyeonggi-do 446-701, South Korea
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21
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Cuko A, Calatayud M, Bromley ST. Stability of mixed-oxide titanosilicates: dependency on size and composition from nanocluster to bulk. NANOSCALE 2018; 10:832-842. [PMID: 29261197 DOI: 10.1039/c7nr05758j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Nanostructured titanosilicate materials based upon interfacing nano-TiO2 with nano-SiO2 have drawn much attention due to their huge potential for applications in a diverse range of important fields including gas sensing, (photo)catalysis, solar cells, photonics/optical components, tailored multi-(bio)functional supports and self-cleaning coatings. In each case it is the specific mixed combination of the two SiO2 and TiO2 nanophases that determines the unique properties of the final nanomaterial. In the bulk, stoichiometric mixing of TiO2 with SiO2 is limited by formation of segregated TiO2 nanoparticles or metastable glassy phases and more controlled disperse crystalline mixings only occur at small fractions of TiO2 (<15 wt%). In order to more fully understand the stability of nano-SiO2 and nano-TiO2 combinations with respect to composition and size, we employ accurate all-electron density functional calculations to evaluate the mixing energy in (TixSi1-xO2)n nanoclusters with a range of sizes (n = 2-24) having different titania molar fractions (x = 0-1). We derive all nanoclusters from a dedicated global optimisation procedure to help ensure that they are the most energetically stable structures for their size and composition. We also consider a selection of representative intimately mixed crystalline solid phase (TixSi1-xO2)bulk systems for comparison. In agreement with experiment, we find that homogeneous mixing of SiO2 and TiO2 in bulk crystalline phases is energetically unfavourable. Conversely, we find that SiO2-TiO2 mixing is energetically favoured in small (TixSi1-xO2)n nanoclusters. Following the evolution of mixing energy with nanocluster size and composition we find that mixing is most favoured in nanoclusters with a diameter of 1 nm with TiO2 molar fractions between 0.3-0.5. Thereafter, mixed nanoclusters with increasing size have progressively less negative mixing energies up to diameters of approximately 1.5 nm. We propose some chemical-structural principles to help rationale this energetically favourable nanoscale mixing. As a guide for experimentalists to observe and characterize these mixed nano-species we also provide two measurable signatures of mixing based on their unique vibrational and structural characteristics.
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Affiliation(s)
- Andi Cuko
- Departament de Ciència de Materials i Química Física and Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona, E-08028 Barcelona, Spain.
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Jin S, Zhang W, Yang Q, Dai L, Zhou P. An inorganic boronate affinity in-needle monolithic device for specific capture of cis-diol containing compounds. Talanta 2017; 178:710-715. [PMID: 29136885 DOI: 10.1016/j.talanta.2017.10.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Revised: 10/03/2017] [Accepted: 10/07/2017] [Indexed: 10/18/2022]
Abstract
In this work, inorganic boronate affinity monolith was prepared by in situ synthesis in 0.33mm i.d. stainless steel needle through sol-gel process using tetraethoxysilane and tetrabutyl orthotitanate as the co-precursors. The morphology, structure and composition of the monolith were characterized. In contrast to conventional boronate affinity materials, inorganic boric acid was used as affinity ligand. Different compounds were used for the evaluation of the boronate affinity of this inorganic monolithic material. The monolith exhibited good selectivity towards cis-diol containing compounds. Recovery of greater than 90% was achieved for in-needle extraction of catechol under neutral conditions. Owing to the hydrophilic property of the monolith, the procedure of affinity chromatography could be performed in aqueous solution. This monolithic in-needle device will be useful for boronate affinity extraction of small-volume samples.
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Affiliation(s)
- Shanxia Jin
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, PR China
| | - Wei Zhang
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, PR China
| | - Qin Yang
- College of Pharmacy, Hubei University of Chinese Medicine, Wuhan 430065, PR China
| | - Lili Dai
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, PR China
| | - Ping Zhou
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, PR China.
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23
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Jin B, He J, Yao L, Zhang Y, Li J. Rational Design and Construction of Well-Organized Macro-Mesoporous SiO 2/TiO 2 Nanostructure toward Robust High-Performance Self-Cleaning Antireflective Thin Films. ACS APPLIED MATERIALS & INTERFACES 2017; 9:17466-17475. [PMID: 28492300 DOI: 10.1021/acsami.7b04140] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Antireflection (AR) thin films on optical substrates are of great significance in high-performance optoelectronic devices. Here, we present a rational design and construction of well-organized macro-mesoporous nanostructure toward robust high-performance self-cleaning antireflective thin films on the basis of effective medium theory and finite difference time domain (FDTD) simulations that combine the optical design principle. A hierarchical macro-mesoporous SiO2 thin film with very high porosity and gradient refractive indexes works as a λ/4-wavelength AR layer and significantly suppresses the reflection in the range from 350 to 1200 nm. Even after dip-coating a layer of high refractive index TiO2 nanocrystals, the nanostructured thin film still exhibits broadband AR properties which are much superior to conventional flat SiO2/TiO2 thin films, especially in the range of 350-500 nm. In addition, the obtained thin film exhibits photocatalytic self-cleaning and durable superhydrophilicity. The advantages brought by the well-organized macro-mesoporous structure are also testified through comparing to the solely mesoporous SiO2/TiO2 film counterpart. Moreover, the pencil hardness test and sandpaper abrasion test show favorable robustness and functional durability of the thin film, which make it extremely attractive for practical applications in optical devices, display devices, and photovoltaic cells.
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Affiliation(s)
- Binbin Jin
- Functional Nanomaterials Laboratory, Center for Micro/Nanomaterials and Technology and Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences , Zhongguancundonglu 29, Haidianqu, Beijing 100190, China
- University of Chinese Academy of Sciences , Beijing 100049, China
| | - Junhui He
- Functional Nanomaterials Laboratory, Center for Micro/Nanomaterials and Technology and Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences , Zhongguancundonglu 29, Haidianqu, Beijing 100190, China
| | - Lin Yao
- Functional Nanomaterials Laboratory, Center for Micro/Nanomaterials and Technology and Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences , Zhongguancundonglu 29, Haidianqu, Beijing 100190, China
| | - Yue Zhang
- Functional Nanomaterials Laboratory, Center for Micro/Nanomaterials and Technology and Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences , Zhongguancundonglu 29, Haidianqu, Beijing 100190, China
| | - Jing Li
- Functional Nanomaterials Laboratory, Center for Micro/Nanomaterials and Technology and Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences , Zhongguancundonglu 29, Haidianqu, Beijing 100190, China
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24
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Li R, Boudot M, Boissière C, Grosso D, Faustini M. Suppressing Structural Colors of Photocatalytic Optical Coatings on Glass: The Critical Role of SiO 2. ACS APPLIED MATERIALS & INTERFACES 2017; 9:14093-14102. [PMID: 28398035 DOI: 10.1021/acsami.7b02233] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The appearance of structural colors on coated-glass is a critical esthetical drawback toward industrialization of photocatalytic coatings on windows for architecture or automobile. Herein we describe a rational approach to suppress the structural color of mesoporous TiO2-based coatings preserving photoactivity and mechanical stiffness. Addition of SiO2 as third component is discussed. TixSi(1-x)O2 mesoporous coatings were fabricated by one-step liquid deposition process through the evaporation induced self-assembling and characterized by GI-SAXS, GI-WAXS, electron microscopies, and in situ Environmental Ellipsometry Porosimetry. Guided by optical simulation, we investigated the critical role of SiO2 on the optical responses of the films but also on the structural, mechanical, and photocatalytic properties, important requirements to go toward real applications. We demonstrate that adding SiO2 to porous TiO2 allows tuning and suppression of structural colors through refractive index matching and up to 160% increase in mechanical stiffening of the films. This study leads us to demonstrate an example of "invisible" coating, in which the light reflection is angle- and thickness-independent, and exhibiting high porosity, mechanical stiffness, and photoactivity.
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Affiliation(s)
- Ronghua Li
- Sorbonne Universités , UPMC Univ Paris 06, CNRS, Collège de France, UMR 7574, Chimie de la Matière Condensée de Paris, F-75005 Paris, France
| | - Mickael Boudot
- Sorbonne Universités , UPMC Univ Paris 06, CNRS, Collège de France, UMR 7574, Chimie de la Matière Condensée de Paris, F-75005 Paris, France
- Institute for Materials Chemistry and Engineering, Kyushu University , 6-1 Kasuga-Koen, Kasuga, Fukuoka 816-8580, Japan
| | - Cédric Boissière
- Sorbonne Universités , UPMC Univ Paris 06, CNRS, Collège de France, UMR 7574, Chimie de la Matière Condensée de Paris, F-75005 Paris, France
| | - David Grosso
- IM2NP, Faculté des Sciences et Techniques , Campus de Saint Jérôme, Avenue Escadrille Normandie Niemen, 13397 Marseille, France
| | - Marco Faustini
- Sorbonne Universités , UPMC Univ Paris 06, CNRS, Collège de France, UMR 7574, Chimie de la Matière Condensée de Paris, F-75005 Paris, France
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25
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Nandha Kumar P, Kannan S. Sequential elucidation of the β-Ca 3(PO 4) 2/TiO 2 composite development from the solution precursors. Dalton Trans 2017; 46:3229-3239. [PMID: 28224142 DOI: 10.1039/c7dt00090a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The sequential formation of β-Ca3(PO4)2/TiO2 composites with assorted ratios synthesized from the solution precursors is described. The phase evolution of the synthesized powders to yield a composite during progressive heat treatments is determined through a set of analytical techniques. Investigation reveals the initial crystallization of apatite and anatase TiO2 (a-TiO2) mixtures at <800 °C. β-Ca3(PO4)2 crystallizes at ∼800 °C and its subsequent stability is retained until 1300 °C. Besides, a gradual phase transition of a- → rutile TiO2 (r-TiO2) transpires in the range of 800-1000 °C before the complete r-TiO2 transformation accomplishes at 1100 °C. The structural stability of the resultant β-Ca3(PO4)2/r-TiO2 composites is retained until 1300 °C. The β-Ca3(PO4)2 lattice also hosts a selective amount of Ti4+ and as a consequence the anticipated β- → α-Ca3(PO4)2 conversion that occurs at 1180 °C is delayed. TiO2 plays a crucial role in the attainment of dense and pore free microstructures of β-Ca3(PO4)2/r-TiO2 composites. The mechanical properties determined through nanoindentation revealed an upsurge trend as a function of TiO2 content in the composites.
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Affiliation(s)
- P Nandha Kumar
- Centre for Nanoscience and Technology, Pondicherry University, Puducherry-605 014, India.
| | - S Kannan
- Centre for Nanoscience and Technology, Pondicherry University, Puducherry-605 014, India.
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26
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Lamiel-Garcia O, Cuko A, Calatayud M, Illas F, Bromley ST. Predicting size-dependent emergence of crystallinity in nanomaterials: titania nanoclusters versus nanocrystals. NANOSCALE 2017; 9:1049-1058. [PMID: 27809322 DOI: 10.1039/c6nr05788h] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Bottom-up and top-down derived nanoparticle structures refined by accurate ab initio calculations are used to investigate the size dependent emergence of crystallinity in titania from the monomer upwards. Global optimisation and data mining are used to provide a series of (TiO2)N global minima candidates in the range N = 1-38, where our approach provides many new low energy structures for N > 10. A range of nanocrystal cuts from the anatase crystal structure are also considered up to a size of over 250 atoms. All nanocrystals considered are predicted to be metastable with respect to non-crystalline nanoclusters, which has implications with respect to the limitations of the cluster approach to modelling large titania nanosystems. Extrapolating both data sets using a generalised expansion of a top-down derived energy expression for nanoparticles, we obtain an estimate of the non-crystalline to crystalline crossover size for titania. Our results compare well with the available experimental results and imply that anatase-like crystallinity emerges in titania nanoparticles of approximately 2-3 nm diameter.
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Affiliation(s)
- Oriol Lamiel-Garcia
- Departament de Ciència de Materials i Química Física and Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona, E-08028 Barcelona, Spain
| | - Andi Cuko
- Departament de Ciència de Materials i Química Física and Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona, E-08028 Barcelona, Spain and SorbonneUniversités, UPMC Univ Paris 06, CNRS, Laboratoire de Chimie Théorique CC 137, 4, place Jussieu F. 75252, Paris Cedex 05, France
| | - Monica Calatayud
- SorbonneUniversités, UPMC Univ Paris 06, CNRS, Laboratoire de Chimie Théorique CC 137, 4, place Jussieu F. 75252, Paris Cedex 05, France and InstitutUniversitaire de France, France
| | - Francesc Illas
- Departament de Ciència de Materials i Química Física and Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona, E-08028 Barcelona, Spain
| | - Stefan T Bromley
- Departament de Ciència de Materials i Química Física and Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona, E-08028 Barcelona, Spain and Institució Catalana de Recerca i Estudis Avançats (ICREA), E-08010 Barcelona, Spain.
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27
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Wu Q, Liu C, Peng J, Liu F. New insights into high temperature hydrothermal synthesis in the preparation of visible-light active, ordered mesoporous SiO2–TiO2 composited photocatalysts. RSC Adv 2017. [DOI: 10.1039/c7ra01368j] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Carbon doped, visible light active and ordered mesoporous TiO2–SiO2 nanocomposites have been successfully synthesized via one step high temperature (180 °C) hydrothermal technology.
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Affiliation(s)
- Qin Wu
- College of Chemistry & Chemical Engineering
- Shaoxing University
- Shaoxing
- China
| | - Chen Liu
- College of Chemistry & Chemical Engineering
- Shaoxing University
- Shaoxing
- China
| | - Jinjun Peng
- College of Chemistry & Chemical Engineering
- Shaoxing University
- Shaoxing
- China
| | - Fujian Liu
- College of Chemistry & Chemical Engineering
- Shaoxing University
- Shaoxing
- China
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28
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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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29
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Su J, Zou X, Li B, Chen H, Li X, Yu Q, Mi Q, Chen JS. Accelerated room-temperature crystallization of ultrahigh-surface-area porous anatase titania by storing photogenerated electrons. Chem Commun (Camb) 2017; 53:1619-1621. [DOI: 10.1039/c6cc08892a] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
A technology for storing photogenerated electrons is for the first time applied for significantly accelerating the crystallization of amorphous TiO2 at room temperature (reducing the reaction time from 80 to 2 days). The resulting porous anatase titania exhibits ultrahigh surface areas up to 736 m2 g−1.
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Affiliation(s)
- Juan Su
- School of Physical Science and Technology
- ShanghaiTech University
- Shanghai 201210
- China
| | - Xiaoxin Zou
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry
- Jilin University
- Changchun 130012
- China
| | - Binghan Li
- School of Physical Science and Technology
- ShanghaiTech University
- Shanghai 201210
- China
| | - Hui Chen
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry
- Jilin University
- Changchun 130012
- China
| | - Xinhao Li
- School of Chemistry and Chemical Engineering
- Shanghai Jiao Tong University
- Shanghai 200240
- China
| | - Qiuying Yu
- School of Chemistry and Chemical Engineering
- Shanghai Jiao Tong University
- Shanghai 200240
- China
| | - Qixi Mi
- School of Physical Science and Technology
- ShanghaiTech University
- Shanghai 201210
- China
| | - Jie-Sheng Chen
- School of Chemistry and Chemical Engineering
- Shanghai Jiao Tong University
- Shanghai 200240
- China
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30
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Lin CXC, Xu C, Yang Y, Lei C, Zhang H, Yu C. Dendritic mesoporous silica–titania nanospheres with enhanced photocatalytic activities. NEW J CHEM 2017. [DOI: 10.1039/c7nj00713b] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Dendritic mesoporous silica–titania nanospheres (DMSTN) show remarkable performance as a photocatalyst and an adsorbent for photochromic methylene green (MG) dye.
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Affiliation(s)
- Chun Xiang Cynthia Lin
- Australian Institute for Bioengineering and Nanotechnology
- The University of Queensland
- Brisbane
- Australia
| | - Chun Xu
- Australian Institute for Bioengineering and Nanotechnology
- The University of Queensland
- Brisbane
- Australia
- School of Dentistry
| | - Yannan Yang
- Australian Institute for Bioengineering and Nanotechnology
- The University of Queensland
- Brisbane
- Australia
| | - Chang Lei
- Australian Institute for Bioengineering and Nanotechnology
- The University of Queensland
- Brisbane
- Australia
| | - Haijiao Zhang
- Institute of Nanochemistry and Nanobiology
- School of Environmental and Chemical Engineering
- Shanghai University
- Shanghai 200444
- P. R. China
| | - Chengzhong Yu
- Australian Institute for Bioengineering and Nanotechnology
- The University of Queensland
- Brisbane
- Australia
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31
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Fabrication of MCM-41 fibers with well-ordered hexagonal mesostructure controlled in acidic and alkaline media. J SOLID STATE CHEM 2016. [DOI: 10.1016/j.jssc.2016.07.030] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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32
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Dong C, Xing M, Zhang J. Economic Hydrophobicity Triggering of CO2 Photoreduction for Selective CH4 Generation on Noble-Metal-Free TiO2-SiO2. J Phys Chem Lett 2016; 7:2962-2966. [PMID: 27415144 DOI: 10.1021/acs.jpclett.6b01287] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
On the basis of the fact that the competitive adsorption between CO2 and H2O on the catalyst plays an important role in the CO2 photoreduction process, here we develop an economic NH4F-induced hydrophobic modification strategy to enhance the CO2 competitive adsorption on the mesoporous TiO2-SiO2 composite surface via a simple solvothermal method. After the hydrophobic modification, the CO2 photoreduction for the selective generation of CH4 over the noble-metal-free TiO2-SiO2 composite can be greatly enhanced (2.42 vs 0.10 μmol/g in 4h). The enhanced CO2 photoreduction efficiency is assigned to the rational hydrophobic modification on TiO2-SiO2 surface by replacing Si-OH to hydrophobic Si-F bonds, which will improve the CO2 competitive adsorption and trigger the eight-electron CO2 photoreduction on the reaction kinetics.
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Affiliation(s)
- Chunyang Dong
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals, School of Chemistry & Molecular Engineering, East China University of Science and Technology , 130 Meilong Road, Shanghai 200237, P.R. China
| | - Mingyang Xing
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals, School of Chemistry & Molecular Engineering, East China University of Science and Technology , 130 Meilong Road, Shanghai 200237, P.R. China
| | - Jinlong Zhang
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals, School of Chemistry & Molecular Engineering, East China University of Science and Technology , 130 Meilong Road, Shanghai 200237, P.R. China
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33
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Xiang X, Zhao H, Yang J, Zhao J, Yan L, Song H, Chou L. One-Pot Synthesis of Ordered Mesoporous NiSiAl Oxides for Catalyzing CO2Reforming of CH4. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600463] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Xianmei Xiang
- State Key Laboratory for Oxo Synthesis and Selective Oxidation; Lanzhou Institute of Chemical Physics; Chinese Academy of Sciences; 730000 Lanzhou P. R. China
- University of Chinese Academy of Sciences; 100049 Beijing P. R. China
| | - Huahua Zhao
- State Key Laboratory for Oxo Synthesis and Selective Oxidation; Lanzhou Institute of Chemical Physics; Chinese Academy of Sciences; 730000 Lanzhou P. R. China
| | - Jian Yang
- State Key Laboratory for Oxo Synthesis and Selective Oxidation; Lanzhou Institute of Chemical Physics; Chinese Academy of Sciences; 730000 Lanzhou P. R. China
| | - Jun Zhao
- State Key Laboratory for Oxo Synthesis and Selective Oxidation; Lanzhou Institute of Chemical Physics; Chinese Academy of Sciences; 730000 Lanzhou P. R. China
| | - Liang Yan
- State Key Laboratory for Oxo Synthesis and Selective Oxidation; Lanzhou Institute of Chemical Physics; Chinese Academy of Sciences; 730000 Lanzhou P. R. China
| | - Huanling Song
- State Key Laboratory for Oxo Synthesis and Selective Oxidation; Lanzhou Institute of Chemical Physics; Chinese Academy of Sciences; 730000 Lanzhou P. R. China
| | - Lingjun Chou
- State Key Laboratory for Oxo Synthesis and Selective Oxidation; Lanzhou Institute of Chemical Physics; Chinese Academy of Sciences; 730000 Lanzhou P. R. China
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34
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Preparation of three-dimensional interconnected mesoporous anatase TiO2-SiO2 nanocomposites with high photocatalytic activities. CHINESE JOURNAL OF CATALYSIS 2016. [DOI: 10.1016/s1872-2067(15)61081-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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35
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Guan BY, Yu L, Li J, Lou XW(D. RETRACTED: A universal cooperative assembly-directed method for coating of mesoporous TiO(2) nanoshells with enhanced lithium storage properties. SCIENCE ADVANCES 2016; 2:e1501554. [PMID: 26973879 PMCID: PMC4783128 DOI: 10.1126/sciadv.1501554] [Citation(s) in RCA: 74] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2015] [Accepted: 01/05/2016] [Indexed: 05/03/2023]
Abstract
TiO2 is exceptionally useful, but it remains a great challenge to develop a universal method to coat TiO2 nanoshells on different functional materials. We report a one-pot, low-temperature, and facile method that can rapidly form mesoporous TiO2 shells on various inorganic, organic, and inorganic-organic composite materials, including silica-based, metal, metal oxide, organic polymer, carbon-based, and metal-organic framework nanomaterials via a cooperative assembly-directed strategy. In constructing hollow, core-shell, and yolk-shell geometries, both amorphous and crystalline TiO2 nanoshells are demonstrated with excellent control. When used as electrode materials for lithium ion batteries, these crystalline TiO2 nanoshells composed of very small nanocrystals exhibit remarkably long-term cycling stability over 1000 cycles. The electrochemical properties demonstrate that these TiO2 nanoshells are promising anode materials.
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Affiliation(s)
- Bu Yuan Guan
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459, Singapore
| | - Le Yu
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459, Singapore
| | - Ju Li
- Department of Nuclear Science and Engineering and Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- Corresponding author. E-mail: (J.L.); (X.W.L.)
| | - Xiong Wen (David) Lou
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459, Singapore
- Corresponding author. E-mail: (J.L.); (X.W.L.)
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36
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Wu Q, Zhang C, Zhang B, Li X, Ying Z, Liu T, Lin W, Yu Y, Cheng H, Zhao F. Highly selective Pt/ordered mesoporous TiO 2 –SiO 2 catalysts for hydrogenation of cinnamaldehyde: The promoting role of Ti 2+. J Colloid Interface Sci 2016; 463:75-82. [DOI: 10.1016/j.jcis.2015.10.026] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2015] [Revised: 10/09/2015] [Accepted: 10/09/2015] [Indexed: 10/22/2022]
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37
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Cao P, Zhou G, Ren Y, Xiao H. Fabrication and photoactivity of short rod-shaped mesoporous SiO2@TiO2 composites with TiO2 shell. RSC Adv 2016. [DOI: 10.1039/c5ra18418e] [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
Short rod-shaped mesoporous SiO2@TiO2 composites containing TiO2 shell were prepared using short rod-shaped mesoporous SiO2–PGMA–PEGMA as template and TBT as titanium source.
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Affiliation(s)
- Pei Cao
- Key Laboratory of Fine Chemicals in Universities of Shandong
- School of Chemistry and Pharmaceutical Engineering
- Qilu University of Technology
- Jinan 250353
- People's Republic of China
| | - Guowei Zhou
- Key Laboratory of Fine Chemicals in Universities of Shandong
- School of Chemistry and Pharmaceutical Engineering
- Qilu University of Technology
- Jinan 250353
- People's Republic of China
| | - Yixian Ren
- Key Laboratory of Fine Chemicals in Universities of Shandong
- School of Chemistry and Pharmaceutical Engineering
- Qilu University of Technology
- Jinan 250353
- People's Republic of China
| | - Hong Xiao
- Key Laboratory of Fine Chemicals in Universities of Shandong
- School of Chemistry and Pharmaceutical Engineering
- Qilu University of Technology
- Jinan 250353
- People's Republic of China
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38
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Lv Y, Xu ZL, Asai H, Shimada N, Nakane K. Thoroughly mesoporous TiO2 nanotubes prepared by a foaming agent-assisted electrospun template for photocatalytic applications. RSC Adv 2016. [DOI: 10.1039/c6ra00241b] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
A thoroughly mesoporous long TiO2 nanotube with intact morphology was firstly prepared using a foaming agent-assisted electrospun template method for photocatalytic applications.
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Affiliation(s)
- Y. Lv
- Frontier Fiber Technology and Science
- Graduate School of Engineering
- University of Fukui
- Fukui
- Japan
| | - Z. L. Xu
- Headquarters for Innovative Society-Academic Cooperation
- University of Fukui
- Fukui
- Japan
| | - H. Asai
- Frontier Fiber Technology and Science
- Graduate School of Engineering
- University of Fukui
- Fukui
- Japan
| | - N. Shimada
- Frontier Fiber Technology and Science
- Graduate School of Engineering
- University of Fukui
- Fukui
- Japan
| | - K. Nakane
- Frontier Fiber Technology and Science
- Graduate School of Engineering
- University of Fukui
- Fukui
- Japan
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39
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Wen P, Ji W, Zhong H, Li L, Zhang B, Hao L, Xu X, Agathopoulos S. Synthesis, characterization and photo-catalytic performance of meso-porous Si–N co-doped nano-spherical anatase TiO2 with high thermal stability. RSC Adv 2016. [DOI: 10.1039/c6ra17933a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Meso-porous Si–N co-doped nano-spherical anatase TiO2 with high thermal stability.
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Affiliation(s)
- PengChao Wen
- Chinese Academy of Science Key Laboratory of Materials for Energy Conversion
- Department of Materials Science and Engineering
- University of Science and Technology of China
- Hefei
- People's Republic of China
| | - WeiWei Ji
- Chinese Academy of Science Key Laboratory of Materials for Energy Conversion
- Department of Materials Science and Engineering
- University of Science and Technology of China
- Hefei
- People's Republic of China
| | - Hao Zhong
- Chinese Academy of Science Key Laboratory of Materials for Energy Conversion
- Department of Materials Science and Engineering
- University of Science and Technology of China
- Hefei
- People's Republic of China
| | - Lin Li
- Chinese Academy of Science Key Laboratory of Materials for Energy Conversion
- Department of Materials Science and Engineering
- University of Science and Technology of China
- Hefei
- People's Republic of China
| | - Bi Zhang
- Chinese Academy of Science Key Laboratory of Materials for Energy Conversion
- Department of Materials Science and Engineering
- University of Science and Technology of China
- Hefei
- People's Republic of China
| | - LuYuan Hao
- Chinese Academy of Science Key Laboratory of Materials for Energy Conversion
- Department of Materials Science and Engineering
- University of Science and Technology of China
- Hefei
- People's Republic of China
| | - Xin Xu
- Chinese Academy of Science Key Laboratory of Materials for Energy Conversion
- Department of Materials Science and Engineering
- University of Science and Technology of China
- Hefei
- People's Republic of China
| | - Simeon Agathopoulos
- Materials Science and Engineering Department
- University of Ioannina
- GR-451 10 Ioannina
- Greece
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40
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Faustini M, Grenier A, Naudin G, Li R, Grosso D. Ultraporous nanocrystalline TiO2-based films: synthesis, patterning and application as anti-reflective, self-cleaning, superhydrophilic coatings. NANOSCALE 2015; 7:19419-19425. [PMID: 26549535 DOI: 10.1039/c5nr06466j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Crack-free, anatase-based optical coatings with a refractive index down to 1.27, a porosity up to 80 vol%, and a tunable thickness up to 1.5 μm were fabricated. The extraordinary stability of the porosity upon thermally induced crystallisation and template removal was attributed to the combined effects of the presence of 10% molar silica in the inorganic phase, a flash treatment at 500 °C, and the use of templates with different dimensions ranging from a few nanometers to 50 nm. The hierarchical porous system was directly patterned by UV lithography and used as multifunctional anti-reflective, self-cleaning coatings.
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Affiliation(s)
- Marco Faustini
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, Collège de France, UMR 7574, Chimie de la Matière Condensée de Paris, F-75005, Paris, France.
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41
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Malgras V, Ji Q, Kamachi Y, Mori T, Shieh FK, Wu KCW, Ariga K, Yamauchi Y. Templated Synthesis for Nanoarchitectured Porous Materials. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2015. [DOI: 10.1246/bcsj.20150143] [Citation(s) in RCA: 484] [Impact Index Per Article: 53.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Victor Malgras
- World Premier International (WPI) Research Center for Materials Nanoarchitechtonics (MANA), National Institute for Materials Science (NIMS)
| | - Qingmin Ji
- World Premier International (WPI) Research Center for Materials Nanoarchitechtonics (MANA), National Institute for Materials Science (NIMS)
| | - Yuichiro Kamachi
- World Premier International (WPI) Research Center for Materials Nanoarchitechtonics (MANA), National Institute for Materials Science (NIMS)
| | - Taizo Mori
- World Premier International (WPI) Research Center for Materials Nanoarchitechtonics (MANA), National Institute for Materials Science (NIMS)
- Liquid Crystal Institute, Chemical Physics Interdisciplinary Program, Kent State University
| | - Fa-Kuen Shieh
- Department of Chemistry, National Central University
| | - Kevin C.-W. Wu
- Department of Chemical Engineering, National Taiwan University
| | - Katsuhiko Ariga
- World Premier International (WPI) Research Center for Materials Nanoarchitechtonics (MANA), National Institute for Materials Science (NIMS)
| | - Yusuke Yamauchi
- World Premier International (WPI) Research Center for Materials Nanoarchitechtonics (MANA), National Institute for Materials Science (NIMS)
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42
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A hydrothermal peroxo method for preparation of highly crystalline silica–titania photocatalysts. J Colloid Interface Sci 2015; 444:87-96. [DOI: 10.1016/j.jcis.2014.12.044] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2014] [Revised: 12/01/2014] [Accepted: 12/08/2014] [Indexed: 11/20/2022]
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43
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A Novel Electrochemical Sensing Strategy for Rapid and Ultrasensitive Detection of 6-Benzylaminopurine in Sprout Vegetables by Hollow Core/Shell-Structured CuO@SiO2 Microspheres. FOOD ANAL METHOD 2015. [DOI: 10.1007/s12161-015-0140-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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44
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Chen Z, FitzGerald PA, Kobayashi Y, Ueno K, Watanabe M, Warr GG, Atkin R. Micelle Structure of Novel Diblock Polyethers in Water and Two Protic Ionic Liquids (EAN and PAN). Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b00082] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Zhengfei Chen
- Newcastle
Institute for Energy and Resources, The University of Newcastle, Callaghan, NSW Australia
| | - Paul A. FitzGerald
- School
of Chemistry, The University of Sydney, Sydney, NSW 2006 Australia
| | - Yumi Kobayashi
- Department
of Chemistry and Biotechnology, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan
| | - Kazuhide Ueno
- Department
of Chemistry and Biotechnology, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan
| | - Masayoshi Watanabe
- Department
of Chemistry and Biotechnology, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan
| | - Gregory G. Warr
- School
of Chemistry, The University of Sydney, Sydney, NSW 2006 Australia
| | - Rob Atkin
- Newcastle
Institute for Energy and Resources, The University of Newcastle, Callaghan, NSW Australia
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45
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Liu F, Kong W, Wang L, Noshadi I, Zhang Z, Qi C. Solvothermal synthesis of stable nanoporous polymeric bases-crystalline TiO2 nanocomposites: visible light active and efficient photocatalysts for water treatment. NANOTECHNOLOGY 2015; 26:085705. [PMID: 25656872 DOI: 10.1088/0957-4484/26/8/085705] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Visible light active and stable nanoporous polymeric base-crystalline TiO2 nanocomposites were solvothermally synthesized from in situ copolymerization of divinylbenzene (DVB) with 1-vinylimidazolate (VI) or 4-vinylpyridine (Py) in the presence of tetrabutyl titanate without the use of any other additives (PDVB-VI-TiO2-x, PDVB-Py-TiO2-x, where x stands for the molar ratio of TiO2 to VI or Py), which showed excellent activity with respect to catalyzing the degradation of organic pollutants of p-nitrophenol (PNP) and rhodamine-B (RhB). TEM and SEM images show that PDVB-VI-TiO2-x and PDVB-Py-TiO2-x have abundant nanopores, and TiO2 nanocrystals with a high degree of crystallinity were homogeneously embedded in the PDVB-VI-TiO2-x and PDVB-Py-TiO2-x, forming a stable 'brick-and-mortar' nanostructure. PDVB-VI and PDVB-Py supports act as the glue linking TiO2 nanocrystals to form nanopores and constraining the agglomeration of TiO2 nanocrystals. XPS spectra show evidence of unique interactions between TiO2 and basic sites in these samples. UV diffuse reflectance shows that PDVB-VI-TiO2-x and PDVB-Py-TiO2-x exhibit a unique response to visible light. Catalytic tests show that the PDVB-VI-TiO2-x and PDVB-Py-TiO2-x were active in catalyzing the degradation of PNP and RhB organic pollutants under visible light irradiation. The enhanced activities of the PDVB-VI-TiO2-x and PDVB-Py-TiO2-x were ascribed to synergistic effects between abundant nanopores and the unique optical adsorption of visible light in the samples.
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Affiliation(s)
- Fujian Liu
- Key Laboratory of Alternative Technologies for Fine Chemicals Process of Zhejiang Province, Department of Chemistry, Shaoxing University, Shaoxing, 312000, People's Republic of China. Department of Chemistry, Zhejiang University (XiXi Campus), Hangzhou, 310028, People's Republic of China
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Gao M, Zhu L, Ong WL, Wang J, Ho GW. Structural design of TiO2-based photocatalyst for H2 production and degradation applications. Catal Sci Technol 2015. [DOI: 10.1039/c5cy00879d] [Citation(s) in RCA: 189] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
This review aims to provide a comprehensive and contemporary overview, as well as a guide of the development of new generation TiO2 based photocatalysts via structural design for improved solar energy conversion technologies.
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Affiliation(s)
- Minmin Gao
- Department of Electrical and Computer Engineering
- National University of Singapore
- Singapore 117583
| | - Liangliang Zhu
- Department of Electrical and Computer Engineering
- National University of Singapore
- Singapore 117583
| | - Wei Li Ong
- Department of Electrical and Computer Engineering
- National University of Singapore
- Singapore 117583
| | - Jing Wang
- Department of Electrical and Computer Engineering
- National University of Singapore
- Singapore 117583
| | - Ghim Wei Ho
- Department of Electrical and Computer Engineering
- National University of Singapore
- Singapore 117583
- Engineering Science Programme
- National University of Singapore
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47
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Yang Q, Liu J, Li H, Li Y, Hou J, Li M, Song Y. Bio-inspired double-layer structure artificial microreactor with highly efficient light harvesting for photocatalysts. RSC Adv 2015. [DOI: 10.1039/c4ra15943h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
The artificial TiO2leaves microreactors replicated from submerged aquatic needle-like leaves with double-layer structure showed superior light harvesting capability and photocatalytic performance.
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Affiliation(s)
- Qiang Yang
- Key Laboratory of Green Printing
- Beijing National Laboratory for Molecular Sciences (BNLMS)
- Center for Molecular Sciences
- Institute of Chemistry
- Chinese Academy of Sciences
| | - Jian Liu
- Key Laboratory of Green Printing
- Beijing National Laboratory for Molecular Sciences (BNLMS)
- Center for Molecular Sciences
- Institute of Chemistry
- Chinese Academy of Sciences
| | - Huizeng Li
- Key Laboratory of Green Printing
- Beijing National Laboratory for Molecular Sciences (BNLMS)
- Center for Molecular Sciences
- Institute of Chemistry
- Chinese Academy of Sciences
| | - Yanan Li
- Key Laboratory of Green Printing
- Beijing National Laboratory for Molecular Sciences (BNLMS)
- Center for Molecular Sciences
- Institute of Chemistry
- Chinese Academy of Sciences
| | - Jue Hou
- Key Laboratory of Green Printing
- Beijing National Laboratory for Molecular Sciences (BNLMS)
- Center for Molecular Sciences
- Institute of Chemistry
- Chinese Academy of Sciences
| | - Mingzhu Li
- Key Laboratory of Green Printing
- Beijing National Laboratory for Molecular Sciences (BNLMS)
- Center for Molecular Sciences
- Institute of Chemistry
- Chinese Academy of Sciences
| | - Yanlin Song
- Key Laboratory of Green Printing
- Beijing National Laboratory for Molecular Sciences (BNLMS)
- Center for Molecular Sciences
- Institute of Chemistry
- Chinese Academy of Sciences
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Marszewski M, Jaroniec M. Scaffold-assisted synthesis of crystalline mesoporous titania materials. RSC Adv 2015. [DOI: 10.1039/c5ra10139e] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Scaffold-assisted synthesis of crystalline mesoporous titania materials with controllable structural and crystalline properties.
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Affiliation(s)
- M. Marszewski
- Department of Chemistry and Biochemistry
- Kent State University
- Kent
- USA
| | - M. Jaroniec
- Department of Chemistry and Biochemistry
- Kent State University
- Kent
- USA
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Carretero-Genevrier A, Drisko GL, Grosso D, Boissiere C, Sanchez C. Mesoscopically structured nanocrystalline metal oxide thin films. NANOSCALE 2014; 6:14025-14043. [PMID: 25224841 DOI: 10.1039/c4nr02909g] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
This review describes the main successful strategies that are used to grow mesostructured nanocrystalline metal oxide and SiO₂ films via deposition of sol-gel derived solutions. In addition to the typical physicochemical forces to be considered during crystallization, mesoporous thin films are also affected by the substrate-film relationship and the mesostructure. The substrate can influence the crystallization temperature and the obtained crystallographic orientation due to the interfacial energies and the lattice mismatch. The mesostructure can influence the crystallite orientation, and affects nucleation and growth behavior due to the wall thickness and pore curvature. Three main methods are presented and discussed: templated mesoporosity followed by thermally induced crystallization, mesostructuration of already crystallized metal oxide nanobuilding units and substrate-directed crystallization with an emphasis on very recent results concerning epitaxially grown piezoelectric structured α-quartz films via crystallization of amorphous structured SiO₂ thin films.
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Affiliation(s)
- Adrian Carretero-Genevrier
- Institut des Nanotechnologies de Lyon (INL) CNRS - Ecole Centrale de Lyon, 36 avenue Guy de Collongue, 69134 Ecully, France
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Temperature-dependent thermal stability and dispersibility of SiO 2 –TiO 2 nanocomposites via a chemical vapor condensation method. POWDER TECHNOL 2014. [DOI: 10.1016/j.powtec.2014.07.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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