Functional Materials Letters
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2023
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IF 1.3
Chaoqian Qin,Jinghong Du,Jiaxing Chen,Jiarui Yang,Shengyang He
Titanium dioxide nanotube arrays doped with Mo 6 + , Gd 3 + , and Mo 6 + - Gd 3 + were prepared by anodic oxidation combined with a two-step electrochemical method. The crystalline structure, surface morphology, light absorption properties, and crystalline transformation process were characterized using XRD, SEM, UV–Vis, DSC, and FT-IR. The results show that Mo 6 + and Gd 3 + single doping of TiO 2 can promote the transformation of amorphous TiO 2 to anatase and inhibit the transformation of anatase phase to rutile, but Mo 6 + – Gd 3 + co-doping promotes both phase transformations, and the anatase compositions of the TiO 2 heat-treated at 450 ∘ C were all over 91%; The tube diameters of TiO 2 nanotubes were all around 60–70 nm; the Mo 6 + - and Gd 3 + -doped TiO 2 light absorption peaks were all significantly red-shifted, with the most obvious change in the Mo 6 + – Gd 3 + co-doping, where the forbidden bandwidth was reduced to 3.01 eV; The degradation rate of pure TiO 2 photocatalytic degradation of methylene blue for 8 h was only 41.9%, while the degradation rate of Mo 6 + – Gd 3 + co-doped TiO 2 was as high as 91.51%; Mo 6 + , Gd 3 + , single doping and co-doping could increase the amount of •OH, •OOH adsorbed on the surface of TiO 2 , which led to the improvement of catalytic performance.
研究领域:
材料科学
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纳米技术
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环境科学
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DOI
高影响因子
Environmental Science-Nano
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2021
·Vol. 8
·期 8
·2214-2222
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IF 8.131
Wenbin Liu,Leiming Lin,Ying Meng,Ziwang Zhao,Yahua Wang,Fubo Luan
Uranium is a common radionuclide contaminant in groundwater. Recovery of uranium from uranium-containing water can achieve the dual purposes of uranium remediation and uranium resource utilization. However, very few studies have successfully achieved this task. In this study, we developed a microbial fuel cell (MFC) system with a titanium dioxide nanotube array (TNTA) cathode, which could efficiently remove (over 95%) and recover (over 97%) uranium from uranium-containing water. Results demonstrated that the removal of U(VI) in the MFC was through an adsorption–reduction–deposition mechanism. U(VI) was adsorbed by the TNTA cathode, and the adsorbed U(VI) was further electroreduced to U(IV)O2 and deposited on the surface of the TNTA cathode. The reduction of adsorbed U(VI) initiated re-equilibration of the desorption reaction of adsorbed U(VI) and induced re-adsorption of U(VI). The re-adsorbed U(VI) could be further electroreduced to U(IV)O2, which resulted in the continuous removal of U(VI). Finally, 2.95 μmol U(VI) was reduced and deposited as U(IV)O2 on the surface of the TNTAs (1476.22 μmol m−2) without observing capacity saturation. Moreover, the deposited U(IV)O2 can be easily separated from the TNTA cathode with dilute nitric acid, and the TNTA cathode can be used repeatedly with stable performance.
研究领域:
环境科学
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微生物学
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材料科学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Xubin Qian,Lei Xu,Yunqing Zhu,Haiying Yu,Junfeng Niu
Removal of triclosan (TCS) in water has attracted increasing attention due to its high detection frequency and potential toxicity. In this study, porous TiO 2 nanotube arrays (TiO 2 NTA) was prepared as the reactive electrochemical membrane (REM) to adsorb aqueous TCS, and subsequently to degrade TCS in-situ (a regeneration process of TiO 2 NTA). Adsorption kinetics and thermodynamic of TCS followed pseudo-second-order model and Langmuir model, respectively. Compared with adsorption at 0 mL min −1 (static adsorption), the initial adsorption rate and the maximum adsorption capacity increased 18.8-fold and 73.8-fold at 300 mL min −1 , respectively. The optimal equilibrium absorption capacity (per projected area of TiO 2 NTA) and the initial adsorption rate were 2042.92 mg m −2 and 108.51 mg m −2 min −1 , respectively. In the subsequently electrochemical oxidation process, 99.8% of the adsorbed TCS was degraded in-situ and TiO 2 NTA was regenerated simultaneously. TiO 2 NTA electrode maintained the stable removal performance of TCS during four adsorption-degradation cycles. The adsorption process was a complex combination of the hydrophobic interaction and electrostatic interaction with/without applied voltage at different pH value. The electrochemical degradation pathways of TCS on TiO 2 NTA were hydroxylation, disproportionation, dichlorination and cleavage of ether bond under the attack of electrochemical generated OH and O 2 − . The flow-through sequential adsorption and electrochemical degradation (SAED) based on TiO 2 NTA REM were proved to be effective method to removal TCS in waters, especially for the water with low conductivity.
研究领域:
环境科学
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材料科学
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化学工程
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产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2021
·
IF 5.097
Yuanjie Xiong,Xiang Liu,Tian Cheng Zhang,Shaojun Yuan
The conversion of As(III) to As(V) in groundwater is an urgent issue, owing to the higher mobility, stronger toxicity, and weaker binding ability of As(III). In this work, the electrocatalytic oxidation of As(III) was efficiently achieved with a facile and environmentally benign method by using hierarchical MnO2-deposited TiO2 nanotube arrays (MnO2/TNAs) as the anode. The electrocatalytic oxidation performance of the as-fabricated MnO2/TNA-coated anode was systematically investigated. The results exhibited that such as-fabricated MnO2/TNAs had a high oxidation efficiency of 90% at a low concentration of As(III) (1 mg L–1). Furthermore, the reaction mechanism was systematically studied by electron spin resonance and free radical capture experiments. The oxidation of As(III) was accomplished via both direct oxidation on the anode surface and indirect oxidation of the reactive oxygen species. The highly efficient TNA-based anode offers a potentially promising advanced material for electrochemical oxidation of trace As(III) in the practical field.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
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2021
·
IF 4.158
Junling Qin,Zhiguang Cao,Jieying He,Hui Li,Zixue Su
Due to their unique structures and physicochemical properties, porous anodic metal oxides including Al 2 O 3 , Fe 2 O 3 , TiO 2 , Ta 2 O 5 and so on, prepared by anodization of corresponding metal substrates in appropriate electrolytes have found applications in various fields. Pore diameter plays a significant role in applications of these anodic metal oxides. It is a common knowledge that the pore diameter of porous metal oxides increases with formation voltage despite of a vast variation of anodization parameters and electrolytes used. Here, we demonstrate that the pore diameter and cell size of anodic TiO 2 nanotube arrays can decrease dramatically under high voltage accompanied by high current density. Impact factors determining the formation of small pore TiO 2 nanotubes under high voltage were discussed. Typically, with the same electrolyte used, the average pore diameter of TiO 2 nanotube arrays changes from ca 26 nm at a formation voltage of 10 V to ca 13 nm at 200 V. It is also demonstrated that at high voltage, small pore TiO 2 nanotubes could be grown with a rate orders of magnitude faster than those grown in a classic way with low voltage and current density.
研究领域:
材料科学
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纳米技术
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产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
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2018
·Vol. 26
·期 33
·33847-33855
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IF 2.8
Wang He-xuan,Zhu Li-nan,Guo Fu-qiao
Atrazine, one of the most widespread herbicides in the world, is considered as an environmental estrogen and has potential carcinogenicity. In this study, atrazine was degraded on boron-fluorine co-doped TiO 2 nanotube arrays (B, F-TiO 2 NTAs), which had similar morphology with the pristine TiO 2 NTAs. The structure and morphology of TiO 2 nanotube samples were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), and UV-visible diffuse reflectance spectroscopy (DRS). It showed that the decoration of fluorine and boron made both the absorption in the visible region enhanced and the band edge absorption shifted. The efficiency of atrazine degradation by B, F-TiO 2 NTAs through photoelectrocatalysis was investigated by current, solution pH, and electrolyte concentration, respectively. The atrazine removal rate reached 76% through photoelectrocatalytic reaction by B, F-TiO 2 NTAs, which was 46% higher than that under the photocatalysis process. Moreover, the maximum degradation rate was achieved at pH of 6 in 0.01 M of Na 2 SO 4 electrolyte solution under a current of 0.02 A and visible light for 2 h in the presence of B, F-TiO 2 NTAs. These results showed that B, F-TiO 2 NTAs exhibit remarkable photoelectrocatalytic activity in degradation of atrazine.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2019
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IF 14.229
Xuelan Hou,Shaohong Jiang,Yongdan Li
A two-anode reduction (TAR) technique is adopted to prepare, in one step without the existence of gaseous hydrogen, black TiO 2 nanotubes co-doped with carbon and nitrogen. A sample prepared with the TAR technique for 2 min achieved the highest photocurrent response as 2.05 mA/cm 2 , which is 3 times as high as that of the pristine TiO 2 nanotubes. A synergistic effect between black hydrogenation and C, N co-doping is observed. The light absorption in the whole ultraviolet-visible (UV–vis) range is also greatly enhanced.
研究领域:
材料科学
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能源科学
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2021
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IF 5.316
Aghil Sabbaghi,Chi Ho Wong,Xijun Hu,Frank L.Y. Lam
Free-standing titanium nanotube arrays (TNTAs) interlayer has been developed and applied to improve the electrochemical performance of Li-S batteries. Results and DTF simulation confirmed that the strong electrochemical interaction of lithium polysulfides (LiPSs) with TNTAs supported by a carbon-coated separator (CCS), suppressed the shuttling effect significantly. The presence of TNTA resulted in stable cycling and superior rate performance by offering a specific discharge capacity of 1050 mA h g −1 after 300 cycles at 0.5 C with a low capacity-decay rate of 0.075% per cycle. The cathode with the loading of 6.8 mg S cm −2 delivered a discharge capacity of 729 mA h g −1 , corresponding to 4.95 mA cm −2 after 100 cycles at the rate of 0.2 C. The outperformance of the cell equipped with TNTAs became more attractive when the cathode with the loading of 3 mg S cm −2 has been fabricated with the simple blade-casting method using sulfur powder. The sulfur cathode delivered a superior discharge capacity of 905 mA h g −1 after 100 cycles with Coulombic efficiency> 97%. The results have demonstrated that the coexistence of TNTAs, CCS and sulfur cathode in the pure phase offers an efficient strategy to achieve a high-energy density for sustainable sulfur-based energy storage systems.
研究领域:
材料科学
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电化学
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能源存储
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产品关联
DOI
高影响因子
CHEMOSPHERE
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2022
·
IF 8.943
Danchen Zhao,Liushan Jiang,Ruochen Yang,Yue Zhang,Qingxiang Zhou
Polyaniline (PANI) is a useful conductive polymer material, and has good adsorption property, which makes it a good modification material. In this work, for the sake of highly enhancing the utilization of visible region in sunlight and accelerating photocatalytic degradation of tetrabromobisphenol A (TBBPA), a typical polybrominated flame retardant , titanium dioxide nanotube arrays (TiO 2 NTAs) were modified with PANI by chemical and electrochemical polymerization. The coated amount of PANI was controlled via adjusting the polymerization time and the amount of aniline in the electrochemical method . The results demonstrate that the EC-PANI/TiO 2 NTAs (synthesized electrochemically) exhibit higher catalytic activity than bare TiO 2 NTAs and C-PANI/TiO 2 NTAs (synthesized chemically) in photoelectrocatalytic degradation of TBBPA under visible light, and the degradation efficiency for TBBPA could reach 94.37% within 120 min. The improved performance was contributed to the synergetic effect of PANI modification which integrated the broad absorption of PANI in visible light region and high catalytic property of TiO 2 NTAs. Interestingly, it was also found that the degradation efficiency of TBBPA by EC-PANI/TiO 2 was further enhanced by up to 95.74% when the ethanol was present in the reaction system as the hole scavenger. Furthermore, the EC-PANI/TiO 2 exhibited excellent stability after 10 cycling experiments. All the results indicated that this new modified material presented strong potential as a photoelectrocatalyst and had great practical applications in the future.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2022
·
IF 4.598
Jia-Yan Pu,Xiu-Tong Wang,Jing-Quan Liu,Mei-Peng Ren,You-Bo Nan,Mao-Sheng Liu,Hui Xu,Li-Hui Yang,Yan-Liang Huang,Bao-Rong Hou
Polydopamine (PDA) coating was prepared on TiO 2 nanotubes array by dip-coating method to improve the photocathodic protection performance of TiO 2 . The morphology, crystal structure, valence state and elemental composition of the PDA@TiO 2 were characterized. The electrochemical tests of open-circuit potential (OCP) and photocurrent density curves were used to characterize their photocathodic protection effects for 304 stainless steels (304SS). The result shows that the TiO 2 combined with PDA can effectively prevent the corrosion of 304SS under visible light irradiation. Moreover, through stability test and immersion test, the sample has good stability and it also has protective effect for 304SS in the dark state.
研究领域:
材料科学
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电化学
·
腐蚀防护
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产品关联
DOI
高影响因子
WATER RESEARCH
·
2025
·
IF 12.4
Delong Yu,Guoquan Zhang,Xiaoli Lv,Xiaochen Xu,Fenglin Yang
Achieving efficient NH 4 + -N degradation into harmless N 2 and simultaneous harvesting hydrogen energy is of great significance for protecting aquatic ecosystems and alleviating energy shortages. Herein, a photoelectrochemical-chlorine (PEC-Cl) system was developed aiming to selective converting ammonia to N 2 with simultaneous H 2 evolution in a wide pH range of 3–13. The Pt decorated black TiO 2 nanotube arrays (Pt/BTNAs) with sufficient oxygen vacancies defects and the enhanced PEC properties were synthesized as the bifunctional electrode. The parameters optimization illustrated high N 2 selectivity (88 %) and H 2 yield rate (67.5 μmol cm -2 h -1 ) at pH 9. The ClO • derived from the cross reactions between active chlorine and HO • plays a predominant role in oxidizing ammonia. More importantly, the Gibbs free energy calculation indicated that Pt decorating can also significantly promote the direct electrochemical ammonia oxidation reaction (AOR) on Pt/BTNAs anode. Under alkaline conditions (pH 9–13), the efficient removal and conversion of ammonia into N 2 in the PEC-Cl system was achieved primarily through the direct anodic AOR, with N 2 selectivity (89 %-93 %) and H 2 yield rate (60.9–68.6 μmol cm -2 h -1 ) comparable to those of the ClO • -mediated indirect AOR. This study presents a flexible method for treating high and medium-concentration NH 4 + -N and simultaneously producing H 2 through the synergistic PEC-Cl and direct electrochemical AOR processes, across a wide pH range.
研究领域:
环境科学
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材料科学
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化学工程
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2021
·
IF 3.196
Zhufeng Shao,Wenhao Liu,Yufeng Zhang,Xiujuan Yang,Min Zhong
Novel MoS 2 nanobelts (NBs) decorated highly ordered alignment TiO 2 nanotubes arrays (TiO 2 -NTAs) with promoted photoelectrocatalytic (PEC) photodegradation and sensing performance under UV-Visible light irradiation were successfully synthesized via a facile combination of anodization and electrodeposition procedure. Simultaneously, the MoS 2 /TiO 2 -NTAs nanohybrids presented a significantly enhanced for PEC activity tests, which were mainly ascribed to the synergistic effect between MoS 2 NBs and TiO 2 -NTAs for the efficient separation of photogenerated carriers induced by the enlarged staggered band offset associated with sulfur vacancies defects. Furthermore, self-consistent interfacial charge transfer mechanism and convincing quantitative dynamic process (i.e. rate constant of charge transfer) for MoS 2 /TiO 2 -NTAs type-II nanoheterojunctions mediated with the p -type doping effect are proposed, which were evaluated by nanosecond time-resolved transient photoluminescence (NTRT-PL) and time-resolved photoluminescence (TRPL) spectra, respectively. Following this scheme, the photodegradation rate (η) toward degradation of methyl orange for optimum MoS 2 /TiO 2 -NTAs-2 nanocomplex was 96% irradiated by UV-Visible light, which are 1.2 and 1.1 times than that of MoS 2 /TiO 2 -NTAs-1 and MoS 2 /TiO 2 -NTAs-5, respectively. Furthermore, the PEC biosensing analysis of MoS 2 /TiO 2 -NTAs-2 was performed for detecting the glutathione, leading to an excellent detect limit of 1.6 μM and the sensitivity of 930 mA cm -2 M -1 . Additionally, the sensitivity of gas-sensing for MoS 2 /TiO 2 -NTAs-2 is 3.1, which are 1.3 and 1.1 folds than that of MoS 2 /TiO 2 -NTAs with MoS 2 deposited times 1 min and 5 min, respectively. It is distinctly manifested that the gas sensing performance of MoS 2 /TiO 2 -NTAs-2 toward ammonia gas is superior than that of MoS 2 /TiO 2 -NTAs-1 and MoS 2 /TiO 2 -NTAs-5 in terms of higher sensitivity degree and faster response speed.
研究领域:
材料科学
·
环境科学
·
传感器技术
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）