Micro & Nano Letters
·
2018
·Vol. 13
·期 10
·1373-1377
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IF 0.841
Hui Zhao,Yuqing Miao
The Ni–W–S nanoparticles (NPs) were synthesised on Ti mesh through the typical hydrothermal method. The obtained Ti/Ni–W–S was characterised on morphology, composition and electrocatalytic property. It showed good electrocatalytic performance towards glucose oxidation in strong alkali electrolyte, exhibiting the potential application in the field of fuel cell. The excellent electrocatalytic activity of Ni–W–S NPs, the favourable electron transfer between electrode and catalysts, as well as the high conductivity of Ti contributed to its final catalytic performance of Ti/Ni–W–S.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2019
·Vol. 30
·期 16
·15097-15104
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IF 2.195
Mi Yijin,Zhao Hui,Jia Dongling,Miao Yuqing
Bosk-like Co–Sn–Se monocrystals are deposited on porous Ti plate through a hydrothermal method. The prepared Co–Sn–Se was characterized with morphology, composition and electrocatalytic properties. Electrochemical measurements revealed that the Ti/Co–Sn–Se electrodes exhibited great catalytic performance for hydrogen evolution reaction with the low onset overpotential of − 50 mV, the small Tafel slope of 83 mV/dec and good stability over an extended period of 34,000 s. The high electrocatalytic activity of bosk-like Co–Sn–Se monocrystals, the fast electron transfer between electrodes and catalysts, and the high conductivity of Ti contribute to their acceptable electrocatalytic performance.
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JOURNAL OF HAZARDOUS MATERIALS
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2024
·
IF 12.2
Xu Yin,Jiatian Yu,Zhifeng Gao,Wei Li,Kajia Wei,Yun Jiang,Yonghao Zhang,Haoming Chen,Weiqing Han
Bromate (BrO 3 – ) is a common by-product of advanced oxidation water treatment processes. In this study, a catalyst combining MXene and Pd was synthesized to eliminate BrO 3 – by electrochemical reduction in flow-through mode. The fabricated Ti/Pd@MXene filter showed superior activity for BrO 3 – reduction compared with Ti/MXene filter. A satisfactory BrO 3 − removal performance by Ti/Pd@MXene filter was obtained at pH values of 5–7 with a current density of 1.0–2.5 mA·cm –2 . The mechanism explored by quenching experiments and EPR analysis demonstrated that atomic hydrogen (H*)-mediated reduction was dominant in the Ti/Pd@MXene filter system and contributed to 84.2 % of the BrO 3 − removal, which was greater than that of Ti (7.1 %) and Ti/MXene (43.9 %). DFT calculations revealed the introduction of Pd nanoparticles on MXene lowered the energy barrier for generating H* from OH* -H* , thus boosting H* formation. Furthermore, the Ti/Pd@MXene filter had favorable stability and applicability, and nearly 90 % of BrO 3 − could be eliminated in different water matrices. Moreover, energy consumption of the Ti/Pd@MXene filter was more competitive than that previously reported (0.348 kWh·mmol −1 ), especially for high BrO 3 − removal (≥75 %). This work highlighted an effective flow-through electrocatalytic filter to induce H* -mediated electrochemical reduction of BrO 3 − .
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2012
·
IF 4.054
Ying Liu,Dong-Ping Wang,Yu-Xiang Yu,Wei-De Zhang
Functional carbon nanotubes (CNTs) were incorporated into Ti-doped Fe 2 O 3 thin films by a facile, one-step co-electrodeposition method. The films were characterized by X-ray diffraction, scanning electron microscopy, UV–visible absorption, and X-ray photoelectron spectroscopy. The introduction of CNTs results in a better absorption in visible region and greatly enhances the photoelectrochemical properties of the Ti–Fe 2 O 3 films. The improved photoelectrochemical properties of the CNTs and Ti co-doped Fe 2 O 3 films are due to the charge equilibration which interplays between the Ti–Fe 2 O 3 and CNTs. The effect of CNTs to mediate fast charge transfer and to retard charge recombination rate in the composites is also demonstrated by kinetics analysis and electrochemical impedance spectroscopy . The influence of different groups-modified CNTs and different content of CNTs was also studied. The highest photocurrent is 4.5 mA/cm 2 at 1.23 V (vs. RHE) obtained by incorporating 0.10 mg/mL amino-group modified CNTs in the Ti–Fe 2 O 3 film. The amino-functionalized CNTs doped film exhibits the highest photoelectric response compared with those doped by the pristine and acid-treated CNTs under the same conditions, which can be ascribed to the better hydrophilicity and dispersibility of the amino-functionalized CNTs.
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Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Jiepeng Zhao,Yifei Ma,Zhaomin Tong,Mei Wang,Liantuan Xiao,Suotang Jia,Xuyuan Chen
Engineering photocatalyst crystal facets and constructing heterojunctions are effective strategies to improve photocatalytic activity. The amino-modified titanium-based metal–organic framework (MOF) NH 2 -MIL-125(Ti) (NM) has drawn extensive attention as a photocatalyst by virtue of its high specific surface area, abundant pore structure, and narrow bandgap. However, its catalytic activity is hindered by fast electron-hole recombination and limited light absorption. This study synthesizes NM with engineered crystal facets and Co 3 O 4 @NH 2 -MIL-125(Ti) (C-NM) composites with varying Co 3 O 4 loadings using a facile hydrothermal method. The impact of heterojunctions and facet design on photocatalytic CO 2 reduction under visible light is also studied. Results show that the C-NM, with exposed {111} facets and optimal Co 3 O 4 loading, demonstrates superior photocatalytic CO and CH 4 production rates of 21.64 μmol h −1 g −1 and 3.99 μmol h −1 g −1 , 2.1 and 1.6 times higher than those of NM {001} , respectively. Experimental characterization and density functional theory (DFT) analyses attribute the improved photocatalytic activity to several mechanisms. First, crystal facet modulation can optimize the active sites and specific surface area of the photocatalysts. Second, by loading the narrow-bandgap Co 3 O 4 nanoparticles, bandgap of the C-NM photocatalyst is further reduced, thereby enhancing the absorption and utilization of visible light. Finally, the NM/Co 3 O 4 heterostructure minimizes electron-hole recombination, significantly boosting CO 2 reduction efficiency.
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NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Dan Wang,Wenjing Cai,Qiuxiang Feng,Feng Cao,Qianli Zhang,Qiang Xu,Li Li,Jie Liu
To develop porous solid-state materials for effective capture of radioactive iodine in both vapor and solution phases is of great importance. In this work, a Zr/Ti-based bimetallic metal-organic framework (AO-UiO-66-ZrTi11) was synthesized via a simple solvothermal method using 2, 5-bis (allyloxy)terephthalic acid, ZrCl4 and Cp2TiCl2. This MOF solid was fully characterized and extensively evaluated for its I2 capturing performance. AO-UiO-66-ZrTi11 demonstrated significantly enhanced I2 uptake capacity, achieving as high as 2.46 g·g-1 for iodine vapor and 1084.4 mg·g-1 for iodine/cyclohexane solution. Kinetic studies of iodine adsorption from solution revealed rapid kinetics, with the process fitting well to the pseudo-second order kinetic model. The superior adsorption performance of AO-UiO-66-ZrTi11 for iodine can be attributed to its unique bimetallic structural features and functional groups. This work provides valuable insights for the further development of efficient adsorbents towards capturing radioactive iodine.
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2015
·
IF 2.729
Yapeng He,Yujie Dong,Weimin Huang,Xuqing Tang,Honghong Liu,Haibo Lin,Hongdong Li
The electrochemical oxidation of acetaminophen, a kind of potentially dangerous pharmaceutical compound, is conducted on planar and porous Ti/boron-doped diamond (BDD) electrodes to investigate the effect of electrode structure on the electrochemical oxidation behavior. Oxidative peak corresponding to the electron transfer of acetaminophen could be observed around 0.90 V (versus saturated calomel electrode, SCE) on BDD electrodes. The current response from a chronoamperometric curve is proportionally linear in the concentration range from 0 to 3 mmol L − 1 and higher response slope could be obtained on porous Ti/BDD electrode. Complete mineralization can be realized on Ti/BDD electrodes while porous Ti/BDD presents higher COD removal rate and current efficiency compared with planar BDD. The decay kinetics of acetaminophen on BDD electrodes follows a pseudo-first-order behavior, and the corresponding apparent rate constants are 0.208 and 0.344 h − 1 for planar and porous Ti/BDD electrodes at 30 mA cm − 2 . From the detection of hydroxyl radicals , higher generation rate and amount can be obtained on porous Ti/BDD electrode. The enhancement for electrochemical oxidation is related to the porous structure of porous Ti/BDD electrode, which provides more active sites for hydroxyl radicals ( OH) generation. The discrepancy between the COD removal and amount of OH could be explained by the utilization rate of OH.
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Chemical Science
·
2016
·Vol. 7
·期 8
·4966-4972
·
IF 9.144
Dan Zhou,Tianjun Zhang,Qinghua Xia,Yarong Zhao,Kexin Lv,Xinhuan Lu,Renfeng Nie
A hydrothermal rota-crystallization method is developed for the one-step synthesis of a hollownest-structured zeolite precursor with the shell composed of autogenously-intergrown MWW nanosheet crystals containing a large number of stacking-pores without using any porogen or hard scaffold. This material possesses a large external surface area. By simple acid washing, the resultant Ti-containing catalyst can be directly used in the epoxidation of alkenes with hydrogen peroxide. The excellent catalytic activity over the Ti-HSZ catalyst is assumed to be due to the exposure of more Ti active sites over the MWW nanosheet crystals in the shell of the catalyst. More importantly, this Ti-HSZ catalyst washed with H2O2/ethanol solution has been reused 6 times without an appreciable decrease in both the conversion of the allyl chloride and the selectivity of the epichlorohydrin, which is ascribed to the structural stability of the hollownest-structured zeolite.
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TETRAHEDRON
·
2016
·
IF 2.645
Yufei Wu,Jie Hou,Yuliang Liu,Mingfu Zhang,Chen-Ho Tung,Yifeng Wang
The highly efficient and chemoselective α,α′-bis-substitution of alkanones is important in organic synthesis. Herein, a dimeric titanium cluster, Ti 2 Cl 2 (OPr i ) 6 ·2HOPr i ( Ti 2 ), is used in the Claisen–Schmidt condensation reaction, for the selectively activation of symmetrical ketones containing α,α′-methylene groups and production of α,α′-bis-substituted alkanones in high efficiency and chemoselectivity. The high efficiency and chemoselectivity can be extended to a variety of typical alkanones and aromatic aldehydes . Both of the oxo-bridged dimeric motif of Ti 2 and the ionic Ti–Cl bond are responsible for the high efficiency and chemoselectivity.
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DALTON TRANSACTIONS
·
2015
·Vol. 45
·期 1
·265-270
·
IF 4.197
Ye Zhang,Zhen-An Qiao,Junmin Liu,Xue Wang,Shuo Yao,Tao Wang,Bing Liu,Yali Ma,Yunling Liu,Qisheng Huo
Ti(IV)-based complexes have been demonstrated as candidates for preparing hybrid and functional materials, and have received considerable attention. In this paper, hierarchical hollow titania materials with different surface nanostructures were synthesized successfully using a hydrothermal process via the transformation of a Ti(IV) oxalate complex as a precursor. Different concentrations of ammonia were used to adjust the morphologies and crystalline forms of the hydrothermal products. The hierarchical hollow anatase titania materials, HHTM-1 (cal) and HHTM-2 (cal), have high surface areas of up to 132 m2 g−1 and 84 m2 g−1, respectively, and show superior performance for dye degradation in water.
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PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2013
·Vol. 15
·期 47
·20698-20705
·
IF 3.829
Dongfang Hou,Xianluo Hu,Yanwei Wen,Bin Shan,Pei Hu,Xiaoqin Xiong,Yun Qiao,Yunhui Huang
Sillenite Bi12MO20 (M = Ti, Ge, Si) nanofibers have been fabricated through a facile electrospinning route for photocatalytic applications. Uniform Bi12MO20 (M = Ti, Ge, Si) nanofibers with diameters of 100–200 nm and lengths of up to several millimeters can be readily obtained by thermally treating the electrospun precursors. The photocatalytic activities of these nanofibers for degradation of rhodamine B (RhB) were explored under UV-visible light. The band structure and the degradation mechanisms were also discussed. The fibrous photocatalysts of Bi12TiO20, Bi12SiO20 and Bi12GeO20 exhibit different photocatalytic behaviours, which are attributed to the microstructure, band gap, and electronic structures.
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Materials Today
·
2017
·
IF 21.695
Donghui Wang,Feng Peng,Jinhua Li,Yuqin Qiao,Qianwen Li,Xuanyong Liu
The selective tumor- and bacteria-killing property is promising for biomedical implants in directly contact with tumor tissue but still presents a considerable challenge. In this study, a butyrate-inserted Ni–Ti layered double hydroxide film (LDH/Butyrate) is prepared on the surface of nitinol alloy via a simple hydrothermal treatment. The prepared film can selectively inhibit tumor growth and metastasis and bacterial infection by taking advantage of the overproduced H 2 O 2 in tumor and infection microenvironments: the pro-tumor and pro-infection molecule H 2 O 2 can be consumed by LDH/Butyrate, and cytotoxic butyrate inserted in LDH/Butyrate is subsequently exchanged out. Such a novel endogenous stimuli-responsive platform is expected to prevent tumor overgrowth, metastasis and bacterial infection and will find a promising application in the design of localized drug-eluting systems.
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