Electrochemically induced Ti3+ self-doping of TiO2 nanotube arrays for improved photoelectrochemical water splitting

Song, Jingnan; Zheng, Maojun; Yuan, Xiangwei; Li, Qiang; Wang, Faze; Ma, Liguo; You, Yuxiu; Liu, Shaohua; Liu, Pengjie; Jiang, Dongkai; Ma, Li; Shen, Wei

doi:10.1007/s10853-017-0930-z

Cited by 65 publications

(41 citation statements)

References 42 publications

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“…The electrochemical reduction method used has been previously reported as a safe and facile method of producing reduced (self-doped) TiO 2 . Electrochemically doped TiO 2 nanotube arrays has shown improved electrochemical performance as aqueous supercapacitor current collectors, while self-doped TiO 2 nano structures have demonstrated improved photocatalytic activity for water splitting [27,28]. Here, we report that this safe, facile and repeatable reduction treatment can be applied to composite TiO 2 electrodes in order to improve their performance as a negative electrode in aqueous AlCl 3 electrolyte, demonstrating high rate capability and stability during cycling.…”

Section: Introductionmentioning

confidence: 98%

Electrochemically Treated TiO2 for Enhanced Performance in Aqueous Al-Ion Batteries

et al. 2018

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The potential for low cost, environmentally friendly and high rate energy storage has led to the study of anatase-TiO2 as an electrode material in aqueous Al3+ electrolytes. This paper describes the improved performance from an electrochemically treated composite TiO2 electrode for use in aqueous Al-ion batteries. After application of the cathodic electrochemical treatment in 1 mol/dm3 KOH, Mott–Schottky analysis showed the treated electrode as having an increased electron density and an altered open circuit potential, which remained stable throughout cycling. The cathodic treatment also resulted in a change in colour of TiO2. Treated-TiO2 demonstrated improved capacity, coulombic efficiency and stability when galvanostatically cycled in 1 mol·dm−3AlCl3/1 mol·dm−3 KCl. A treated-TiO2 electrode produced a capacity of 15.3 mA·h·g−1 with 99.95% coulombic efficiency at the high specific current of 10 A/g. Additionally, X-ray diffraction, scanning electron microscopy and X-ray photoelectron spectroscopy were employed to elucidate the origin of this improved performance.

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Section: Introductionmentioning

confidence: 98%

Electrochemically Treated TiO2 for Enhanced Performance in Aqueous Al-Ion Batteries

et al. 2018

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“…Unlike zero‐dimensional NPs, one‐dimensional TNTs have more developed surface area. TNTs can be synthesized by the hydrothermal method, the soft chemical method or electrochemical oxidation of titanium foil . The former two methods allow one to produce TNTs with crystal structures of H 2 Ti 3 O 7 , H 2 Ti 4 O 9 ·H 2 O and lepidocrocite H x Ti 2− x /4 □ x /4 O 4 ( x ∼ 0.7; □: vacancy), while the latter allows the production of nanotubes with anatase TiO 2 structure.…”

Section: Introductionmentioning

confidence: 99%

Influence of Ag/titanate nanotubes on physicochemical, antifouling and antimicrobial properties of mixed‐matrix polyethersulfone ultrafiltration membranes

Mozia

Sienkiewicz

Szymański

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND: One of the main drawbacks of membrane processes is (bio)fouling. Recent attempts to overcome these phenomena focus on incorporation of nanoparticles into polymeric membrane matrices. This paper presents an investigation of the influence of modification of polyethersulfone (PES) ultrafiltration membranes with Ag/titanate nanotubes (Ag/TNTs) on physicochemical characteristics, water permeability and antifouling and antibacterial properties.RESULTS: The modified membranes were prepared via a wet phase inversion method by adding 0.1-1.5 wt% of Ag/TNTs relative to PES into the casting solution. An increase of water permeability with increasing Ag/TNTs content up to 1 wt% was found. The modification contributed to fouling mitigation during ultrafiltration of humic acids solution due to (i) improved hydrophilicity, (ii) presence of Ag/TNTs turbulence promoters and (iii) negative surface charge of the membranes. A correlation between membrane surface roughness, zeta potential and proneness to fouling is discussed. The highest inhibition of bacterial growth, reaching 99.8 and 99.3% for Escherichia coli and Staphylococcus epidermidis, respectively, was observed at the highest Ag/TNTs content. CONCLUSIONS:The introduction of Ag/TNTs into PES membrane structures improved membrane permeability, fouling resistance and antibacterial properties. The most significant improvement was observed in the case of membranes containing the largest quantities of Ag/TNTs. density of polyethersulfone (g mL −1 ) w density of water at 20 ∘ C (g mL −1 )

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“…In addition, the fast recombination rate of the photogenerated electron–hole pairs also restricts their photochemical applications. Therefore, great efforts have been made to expand its absorption range to the visible region, including decoration with precious metals [ 12 , 18 ], element doping [ 19 , 20 ], dye-sensitization [ 21 ], or coupling with other semiconductors to form a heterojunction [ 22 – 24 ].…”

Section: Introductionmentioning

confidence: 99%

Efficient Photoelectrochemical Water Splitting by g-C3N4/TiO2 Nanotube Array Heterostructures

et al. 2018

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Well-ordered TiO2 nanotube arrays (TNTAs) decorated with graphitic carbon nitride (g-C3N4) were fabricated by anodic oxidization and calcination process. First, TNTAs were prepared via the anodic oxidation of Ti foil in glycerol solution containing fluorinion and 20% deionized water. Subsequently, g-C3N4 film was hydrothermally grown on TNTAs via the hydrogen-bonded cyanuric acid melamine supramolecular complex. The results showed that g-C3N4 was successfully decorated on the TNTAs and the g-C3N4/TNTAs served as an efficient and stable photoanode for photoelectrochemical water splitting. The facile deposition method enables the fabrication of efficient and low-cost photoanodes for renewable energy applications.Electronic supplementary materialThe online version of this article (10.1007/s40820-018-0192-6) contains supplementary material, which is available to authorized users.

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Electrochemically induced Ti3+ self-doping of TiO2 nanotube arrays for improved photoelectrochemical water splitting

Cited by 65 publications

References 42 publications

Electrochemically Treated TiO2 for Enhanced Performance in Aqueous Al-Ion Batteries

Electrochemically Treated TiO2 for Enhanced Performance in Aqueous Al-Ion Batteries

Influence of Ag/titanate nanotubes on physicochemical, antifouling and antimicrobial properties of mixed‐matrix polyethersulfone ultrafiltration membranes

Efficient Photoelectrochemical Water Splitting by g-C3N4/TiO2 Nanotube Array Heterostructures

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