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Zhao B, Xu H, Zhang K, Gao B, Wang Y, Wang Q, Zhang K, Huang Y, Li J. Visible-light-driven CQDs/TiO 2 photocatalytic simultaneous removal of Cr(VI) and organics: Cooperative reaction, kinetics and mechanism. CHEMOSPHERE 2022; 307:135897. [PMID: 35932916 DOI: 10.1016/j.chemosphere.2022.135897] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Revised: 07/12/2022] [Accepted: 07/29/2022] [Indexed: 06/15/2023]
Abstract
CQDs/TiO2 was synthesized with a coprecipitation method and characterized by XRD, SEM, TEM/HRTEM, BET, XPS, UV-Vis DRS and I-t curve technologies. UV-Vis DRS displayed that absorption spectrum of CQDs/TiO2 enlarged to visible light zone, suggesting that CQDs/TiO2 can be irradiated by visible light. I-t curve showed that photocurrent of CQDs/TiO2 was higher than that of bare TiO2, revealing that the doping of CQDs accelerated the transfer of photoelectrons and restrained the recombination of photoinduced carriers. Simultaneous removal of Cr(VI) and organics with CQDs/TiO2 photocatalytic reaction was investigated and factors were optimized, and almost all Cr(VI) and organics were removed under the optimum conditions. Experimental results displayed that there was a distinct cooperation removal effect between Cr(VI) and organics in CQDs/TiO2 photocatalytic reaction. XPS analysis proved that Cr(VI) was reduced to Cr(III) in situ on CQDs/TiO2 surface. There were e-, h+,·OH and ·O2- active species which were detected with DMPO in ESR test during CQDs/TiO2 photocatalytic reaction, and scavenger experiment proved that e- and h+ were the substantial reactants for Cr(VI) and organics, respectively. The pathway of photocatalytic simultaneous removal of Cr(VI) and organics underwent four steps: adsorption of Cr(VI) and organics on CQDs/TiO2 surface; production of photo electrons and holes in visible light; reduction of Cr(VI) and oxidation of organics; desorption of Cr(III) and intermediates. Photocatalytic reaction kinetics of Cr(VI) and organics were both confirmed to pseudo first-order reaction. Life span and small scale real application tests both demonstrated that CQDs/TiO2 had a potential application to wastewater containing Cr(VI) and organics.
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Affiliation(s)
- Baoxiu Zhao
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, China.
| | - Hao Xu
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, China
| | - Keliu Zhang
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, China
| | - Bo Gao
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, China
| | - Yilin Wang
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, China
| | - Qi Wang
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, China
| | - Kaixin Zhang
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, China
| | - Yue Huang
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, China
| | - Jincheng Li
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, China
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Cluster-Assembled Nanoporous Super-Hydrophilic Smart Surfaces for On-Target Capturing and Processing of Biological Samples for Multi-Dimensional MALDI-MS. Molecules 2022; 27:molecules27134237. [PMID: 35807482 PMCID: PMC9268371 DOI: 10.3390/molecules27134237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Revised: 06/21/2022] [Accepted: 06/26/2022] [Indexed: 12/10/2022] Open
Abstract
Matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS) on cluster-assembled super-hydrophilic nanoporous titania films deposited on hydrophobic conductive-polymer substrates feature a unique combination of surface properties that significantly improve the possibilities of capturing and processing biological samples before and during the MALDI-MS analysis without changing the selected sample target (multi-dimensional MALDI-MS). In contrast to pure hydrophobic surfaces, such films promote a remarkable biologically active film porosity at the nanoscale due to the soft assembling of ultrafine atomic clusters. This unique combination of nanoscale porosity and super-hydrophilicity provides room for effective sample capturing, while the hydrophilic-hydrophobic discontinuity at the border of the dot-patterned film acts as a wettability-driven containment for sample/reagent droplets. In the present work, we evaluate the performance of such advanced surface engineered reactive containments for their benefit in protein sample processing and characterization. We shortly discuss the advantages resulting from the introduction of the described chips in the MALDI-MS workflow in the healthcare/clinical context and in MALDI-MS bioimaging (MALDI-MSI).
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Kurenkova AY, Kozlova EA, Kaichev VV. The Influence of Reaction Conditions on the Rate of Hydrogen Evolution in Aqueous Solutions of Glycerol over Pt/TiO2 Photocatalysts. KINETICS AND CATALYSIS 2021. [DOI: 10.1134/s002315842006004x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Determination of the small amount of proteins interacting with TiO2 nanotubes by AFM-measurement. Biomaterials 2019; 192:368-376. [DOI: 10.1016/j.biomaterials.2018.11.013] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Revised: 11/07/2018] [Accepted: 11/09/2018] [Indexed: 12/18/2022]
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Rouster P, Pavlovic M, Szilagyi I. Immobilization of Superoxide Dismutase on Polyelectrolyte-Functionalized Titania Nanosheets. Chembiochem 2017; 19:404-410. [DOI: 10.1002/cbic.201700502] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Indexed: 01/06/2023]
Affiliation(s)
- Paul Rouster
- Department of Inorganic and Analytical Chemistry; University of Geneva; 30 Quai Ernest-Ansermet 1205 Geneva Switzerland
| | - Marko Pavlovic
- Department of Inorganic and Analytical Chemistry; University of Geneva; 30 Quai Ernest-Ansermet 1205 Geneva Switzerland
| | - Istvan Szilagyi
- Department of Inorganic and Analytical Chemistry; University of Geneva; 30 Quai Ernest-Ansermet 1205 Geneva Switzerland
- MTA-SZTE Lendület Biocolloids Research Group; Department of Physical Chemistry and Materials Science; University of Szeged; 1 Aradi vértanúk tere 6720 Szeged Hungary
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RETRACTED: Magnetic Ce-doped TiO2/NiFe2O4/diatomite ternary composite: Enhanced visible-light-driven photocatalytic performance. POWDER TECHNOL 2017. [DOI: 10.1016/j.powtec.2017.03.005] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Lu J, Li H, Cui D, Zhang Y, Liu S. Enhanced Enzymatic Reactivity for Electrochemically Driven Drug Metabolism by Confining Cytochrome P450 Enzyme in TiO2 Nanotube Arrays. Anal Chem 2014; 86:8003-9. [DOI: 10.1021/ac502234x] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Jusheng Lu
- School of Chemistry and Chemical
Engineering, Southeast University, Nanjing 211189, People’s Republic of China
| | - Henan Li
- School of Chemistry and Chemical
Engineering, Southeast University, Nanjing 211189, People’s Republic of China
| | - Dongmei Cui
- School of Chemistry and Chemical
Engineering, Southeast University, Nanjing 211189, People’s Republic of China
| | - Yuanjian Zhang
- School of Chemistry and Chemical
Engineering, Southeast University, Nanjing 211189, People’s Republic of China
| | - Songqin Liu
- School of Chemistry and Chemical
Engineering, Southeast University, Nanjing 211189, People’s Republic of China
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Sheng R, Luo T, Li H, Sun J, Wang Z, Cao A. Cholesterol-based cationic lipids for gene delivery: Contribution of molecular structure factors to physico-chemical and biological properties. Colloids Surf B Biointerfaces 2014; 116:32-40. [DOI: 10.1016/j.colsurfb.2013.12.039] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2013] [Revised: 12/05/2013] [Accepted: 12/18/2013] [Indexed: 11/08/2022]
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Bioelectrocatalysis at mesoporous antimony doped tin oxide electrodes—Electrochemical characterization and direct enzyme communication. Electrochim Acta 2013. [DOI: 10.1016/j.electacta.2013.03.144] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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ITO electrode modified by a gold ion implantation technique for direct electrocatalytic sensing of hydrogen peroxide. Mikrochim Acta 2012. [DOI: 10.1007/s00604-012-0792-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Liang Y, Kong B, Zhu A, Wang Z, Tian Y. A facile and efficient strategy for photoelectrochemical detection of cadmium ions based on in situelectrodeposition of CdSe clusters on TiO2nanotubes. Chem Commun (Camb) 2012; 48:245-7. [DOI: 10.1039/c1cc16060e] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Liu L, Wang N, Guo L. Convertible electron transfer pathways of cytochrome c at TiO2 quantum electrode. RSC Adv 2012. [DOI: 10.1039/c2ra01049f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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