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Zhang G, Jiang A, Huang X, Yuan T, Wu H, Li L, Liu Z. Mechanism of One-Step Hydrothermally Synthesized Titanate Catalysts for Ozonation. Molecules 2022; 27:molecules27092706. [PMID: 35566056 PMCID: PMC9103479 DOI: 10.3390/molecules27092706] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Revised: 04/18/2022] [Accepted: 04/20/2022] [Indexed: 02/01/2023] Open
Abstract
A titanate nanotube catalyst for ozonation was synthesized with a simple one-step NaOH hydrothermal treatment without energy-consuming calcination. The synthesized titania catalysts were characterized by X-ray diffraction (XRD), Raman, porosimetry analysis, high-resolution transmission electron microscopy (HR-TEM), Fourier transformed infrared (FTIR), and electron paramagnetic resonance (EPR) analysis. The catalyst treated with a higher concentration of NaOH was found to be more catalytically active for phenol removal due to its higher titanate content that would facilitate more OH groups on its surface. Furthermore, the main active oxidizing species of the catalytic ozonation process were recognized as singlet oxygen and superoxide radical, while the hydroxyl radical may only play a minor role. This work provides further support for the correlation between the properties of titania and catalytic performance, which is significant for understanding the mechanism of catalytic ozonation with titania-based materials.
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Affiliation(s)
- Geshan Zhang
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China; (T.Y.); (H.W.); (L.L.); (Z.L.)
- Correspondence: (G.Z.); (X.H.); Tel.: +86-571-8832-0412 (G.Z.)
| | - Anhua Jiang
- College of Environment, Zhejiang University of Technology, Hangzhou 310014, China;
| | - Xinwen Huang
- College of Environment, Zhejiang University of Technology, Hangzhou 310014, China;
- Correspondence: (G.Z.); (X.H.); Tel.: +86-571-8832-0412 (G.Z.)
| | - Tian Yuan
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China; (T.Y.); (H.W.); (L.L.); (Z.L.)
| | - Hanrui Wu
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China; (T.Y.); (H.W.); (L.L.); (Z.L.)
| | - Lichun Li
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China; (T.Y.); (H.W.); (L.L.); (Z.L.)
| | - Zongjian Liu
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China; (T.Y.); (H.W.); (L.L.); (Z.L.)
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Wang L, Zhou B, Liu Z, Dong L, Cheng K, Weng W. Surface hydroxylation regulates cellular osteogeneses on TiO 2 and Ta 2O 5 nanorod films. Colloids Surf B Biointerfaces 2018; 167:213-219. [PMID: 29656204 DOI: 10.1016/j.colsurfb.2018.04.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Revised: 03/22/2018] [Accepted: 04/04/2018] [Indexed: 11/15/2022]
Abstract
Titanium and tantalum have been widely used for orthopedic and dental implant applications. However, how their inherent surface features regulate cellular osteogeneses still remains elusive. In this study, we engineered two distinct TiO2 and Ta2O5 nanorod films as the two model oxidized surfaces to investigate their intrinsic osteogenic behaviors. The results indicated that the distinctive gradient on zeta potential against pH, corresponding to the deprotonation rate, but not the hydroxyl amount or hydroxylation polarity played a critical role on the cellular osteogenic performance. TiO2 nanorod film with a higher deprotonation rate significantly upregulated the expression of osteogeneses-related gene and protein, comparing to that of Ta2O5 nanorod film. These results might be attributed to that surface with higher deprotonation rateprovided more Bronsted acid-base surface sites to react with protein residues, leading to a mild change in conformation of the absorbed proteins, and subsequently facilitating to trigger the integrin-focal adhesion cytoskeleton actin transduction pathway. This study, therefore, provides a new insight into the understanding the role of material surface hydroxylation on cellular osteogenic responses.
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Affiliation(s)
- Liming Wang
- School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou, 310027, China
| | - Beibei Zhou
- School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou, 310027, China
| | - Zongguang Liu
- School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou, 310027, China
| | - Lingqing Dong
- School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou, 310027, China; The Affiliated Stomatologic Hospital, School of Medicine, Zhejiang University, Hangzhou, 310003, China.
| | - Kui Cheng
- School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou, 310027, China
| | - Wenjian Weng
- School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou, 310027, China.
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