CHEMOSPHERE
·
2019
·
IF 5.108
Chengzhi Zhou,Yanping Wang,Jie Chen,Lei Xu,Haiming Huang,Junfeng Niu
Electrochemical degradation of antiviral drug abacavir was investigated by using a penetration flux porous Ti/SnO 2 –Sb anode prepared by sol-gel method. The effects of applied current density, initial pH, and inorganic anions on the degradation kinetics were systematically studied. Degradation efficiency more than 97% was performed in only 10 min at a current density of 0.2 mA cm −2 . The corresponding degradation rate constant and the lowest electrical energy per order were calculated to be 0.36 min −1 and 6.5 mWh L −1 , respectively. Extending the reaction duration to 5 h, 53.3% of TOC removal was observed. The results indicated that effective degradation of abacavir appeared in the penetration flux porous Ti/SnO 2 –Sb anode with a very low energy consumption. Furthermore, the electrochemical intermediate products and the reaction site during abacavir degradation were detected and recognized. The quantitative structure-activity relationship model revealed that the potential risks of abacavir to the aquatic organism, such as fish, greatly decreased after flowing through the penetration flux porous Ti/SnO 2 –Sb anode.
研究领域:
环境科学
·
药学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2020
·
IF 6.155
Kun Wang,Xian Tong,Jixing Lin,Aiping Wei,Yuncang Li,Matthew Dargusch,Cuie Wen
Zinc (Zn) and its biocompatible and biodegradable alloys have substantial potential for use in orthopedic implants. Nevertheless, pure Zn with a hexagonal close-packed crystal structure has only two independent slip systems, therefore exhibiting extremely low elongation and yield strength in its as-cast condition, which restricts its clinical applications. In this study, as-cast Zn–xTi (titanium) (x = 0.05, 0.10, 0.20, and 0.30 wt.%) binary alloys were hot-rolled and their microstructures, mechanical properties , wear resistance, and cytocompatibility were comprehensively investigated for orthopedic implant applications. The microstructures of both as-cast and hot-rolled Zn–xTi alloys consisted of an α-Zn matrix phase and a TiZn 16 phase, while Zn–0.2Ti and Zn–0.3Ti exhibited a finer α-Zn phase due to the grain-refining effect of Ti. The hot-rolled Zn–0.2Ti alloy exhibited the highest yield strength (144.5 MPa), ultimate strength (218.7 MPa), and elongation (54.2%) among all the Zn–xTi alloys. The corrosion resistance of Zn–xTi alloys in Hanks’ solution decreased with increasing addition of Ti, and the hot-rolled Zn–0.3Ti alloy exhibited the highest corrosion rates of 432 μm/y as measured by electrochemical testing and 57.9 μm/y as measured by immersion testing. The as-cast Zn–xTi alloys showed lower wear losses than their hot-rolled counterparts. The extracts of hot-rolled Zn–xTi alloys at concentrations of ≤ 25% showed no cytotoxicity to MG-63 osteosarcoma cells and the extracts of Zn–xTi alloys exhibited enhanced cytocompatibility with increasing Ti content.
研究领域:
材料科学
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生物医学工程
·
骨科
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产品关联
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2022
·
IF 5.876
Haoyi Lin,Jiaqi Wang,Boxin Gao,Kaixuan Yang,Guojun Lv,Shixue Qi,Zhiguo Zhu,Hongying Lü
Solvent-free and low-template synthesis of zeolite materials is the future direction of zeolite production, which meets the requirements of green chemistry. Ti-Beta zeolite with opened channel systems of the 3-dimensional 12-membered ring is a promising industrial catalyst in the field of selective oxidations . Herein, nanosized Ti-Beta zeolites were successfully synthesized via interzeolite transformation of siliceous MOR zeolite using sample and commercially available tetraethylammonium hydroxide (TEAOH) as organic structure-directing agents under solvent-free and low-template-content (TEAOH/SiO 2 = 0.2) conditions within a short crystallization time. The crystallization mechanism and Ti coordinated state were thoroughly investigated by numerous characterization techniques. It was found that the hydrothermal synthesis of Ti-Beta-M zeolites obeyed a liquid crystallization mechanism, during which pre-dissolution of the silicon source MOR zeolite was a critical step in achieving successful crystallization. Ti 4+ ions mainly existed in the form of tetrahedrally coordinated states in zeolite framework. Thus Ti-Beta zeolites showed remarkable activity and reusability during the oxidative desulfurization of fuel oil. Moreover, the deactivated mechanism and regenerated method were also studied in detail. This work provides new guidance for solvent-free and low template content synthesis of metallosilicate zeolites.
研究领域:
材料科学
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绿色化学
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催化化学
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产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·
IF 5.8
Li Yang,Ma Hairun,Li Qianwei,Yan Guangxu,Guo Shaohui
Ti/SnO 2 -Sb electrodes possess high catalytic activity and efficiently degrade nitrobenzene (NB); however, their low service life limits their wide application. In this study, we used one-step hydrothermal synthesis to successfully prepare Pt-Nd co-doped Ti/SnO 2 -Sb nanosphere electrodes. Scanning electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy were applied to characterize the surface morphology, microstructure, and chemical composition of the electrodes, respectively. The electrochemical activity and stability of the electrodes were characterized via linear sweep and cyclic voltammetry, electrochemical impedance spectroscopy, and an accelerated service life test; their performance for NB degradation was also studied. An appropriate amount of Pt-Nd co-doping refined the average grain size of SnO 2 and formed a uniform and compact coating on the electrode surface. The oxygen evolution potential, total voltammetric charge, and electron transfer resistance of the Ti/SnO 2 -Sb-Nd-Pt electrodes were 1.88 V, 3.77 mC/cm 2 , and 11.50 Ω, respectively. Hydroxy radical was the main active radical species during the electrolytic degradation of nitrobenzene with Ti/SnO 2 -Sb-Nd-Pt. After Pt-Nd co-doping, the accelerated service life of the electrodes was extended from 8.0 min to 78.2 h (500 mA/cm 2 ); although the NB degradation rate decreased from 94.1 to 80.6%, the total amount of theoretical catalytic degradation of NB in the effective working time increased from 17.4 to 8754.1 mg/cm 2 . These findings reveal good application potential for the electrodes and provide a reference for developing efficient and stable electrode materials.
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 PHYSICS AND CHEMISTRY OF SOLIDS
·
2022
·
IF 4.383
Wenlong Li,Ludan Shang,Dafei You,Hao Li,Han Wang,Lijuan Ma,Xinna Wang,Yanwei Li,Yanhui Li
In this paper, we synthesized a core-shell structured Fe 3 O 4 @Ti-PDA nanoparticles as photocatalyst by a facile method in environmental friend mild reaction conditions without organic solvent . Firstly, Fe 3 O 4 was synthesized by solvothermal method, and Fe 3 O 4 @PDA was formed by dopamine (DA) self-polymerization to encapsulate Fe 3 O 4 to form polydopamine (PDA) lager. Then, the surface of Fe 3 O 4 @PDA was wrapped by coordinating bis(2-hydroxypropionic acid) diammonium dihydroxide(Ti-BALDH) with DA combined DA self-polymerizing to obtain Fe 3 O 4 @Ti-PDA. As control, we synthesized another photocatalyst Fe 3 O 4 @PDA@TiO 2 . Compared with Fe 3 O 4 @PDA@TiO 2 (band gap 3.0 eV), Fe 3 O 4 @Ti-PDA had a narrower band gap (2.5 eV) and a wider light absorption range (from ultraviolet to visible light to near-infrared light), as a photocatalyst, which can make full use of sunlight to improve photocatalytic efficiency. Meanwhile, magnetic core of Fe 3 O 4 @Ti-PDA made it was easy to separate from aqueous solution for convenient recovery. Using methylene blue (MB) as model pollutant, the degradation efficiency of Fe 3 O 4 @Ti-PDA on MB reached to 92.4% under visible light irradiation for 120 min without cocatalyst, while for Fe 3 O 4 @PDA@TiO 2 only to 32.5%. The result indicated Fe 3 O 4 @Ti-PDA enabled photocatalytic oxidation and rapid separation when photogenerated electron-hole pairs were generated. After three recycles, the degradation efficiency of Fe 3 O 4 @Ti-PDA on MB still remained at 86.47%, showing good recycle stability.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF CHEMISTRY
·
2017
·Vol. 35
·期 2
·203-208
·
IF 1.852
Hongxia Qin,Yingying Bian,Yaxi Zhang,Longfei Liu,Zhenfeng Bian
In this paper, the process of photocatalytic reduction of hexavalent chromium was investigated over Ti 3+ -modified TiO 2 photocatalysts. The Ti 3+ surface defects were repaired by annealing as-prepared sample at different temperatures to control the amount of Ti 3+ sites. The samples were characterized by SEM, XRD, BET, UV–vis absorption, EPR and XPS. The results showed Ti 3+ defects were successfully doped in TiO 2 . The surface selective adsorption of hexavalent chromium [Cr 2 O 7 2 − (Cr(VI))] and the desorption of trivalent chromium [Cr 3+ (Cr(III))] were investigated during the process of photocatalytic reduction. Zeta potential results presented that the increased positive charges due to more Ti 3+ defects on the surface show a significant improvement for adsorption of Cr(VI). Accordingly, the surface positive charges controlled by the Ti 3+ defects play important roles in the photocatalytic reduction of Cr(VI).
研究领域:
环境化学
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材料科学
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光催化
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表面科学
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环境污染治理
✓ 已验证
DOI
高影响因子
Journal of Environmental Sciences
·
2023
·
IF 6.9
Lei Zheng,Lixia Sun,Jiangbo Qiu,Junling Song,Luyi Zou,Yue Teng,Yongzhong Zong,Hongyan Yu
The coexistence of inorganic and organic contaminants is a challenge for real-life water treatment applications. Therefore, in this research, we used NH 2 -MIL-125(Ti) to evaluate the single adsorption of hexavalent chromium (Cr(VI)) or Rhodamine B (RhB) in an aqueous solution and further investigate simultaneous adsorption experiments to compare the adsorption behavior changes. The main influencing factors, for example, reaction time, initial concentration, reaction temperature, and pH were studied in detail. In all reaction systems, the pseudo-second-order kinetic and Langmuir isotherm models were well illuminated the adsorption progress of Cr(VI) and RhB. Thermodynamic studies showed that the adsorption process was spontaneous and endothermic. As compared to the single system, the adsorption capacity of Cr(VI) in the binary system gradually decreased as the additive amount of RhB increased, whereas the adsorption capacity of RhB in the binary system was expanded brilliantly. When the binary reaction system contained 100 mg/L Cr(VI), the removal rate of RhB increased to 97.58%. The formation of Cr(VI)-RhB and Cr(III)-RhB complexes was the cause that provided facilitation for the adsorption of RhB. These findings prove that the interactions during the water treatment process between contaminants may obtain additional benefits, contributing to a better adsorption capacity of co-existing contaminant.
研究领域:
环境科学
·
化学工程
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DOI
高影响因子
OPTICAL MATERIALS
·
2021
·
IF 3.08
Yang Wang,Sheng Feng,Wei Wu,Yun Zhou,Zhiwei Ye,Xiaojun Dai,Xun Cao
In this article, we reported a method for synthesizing cluster-like NH 2 -MIL-125(Ti)/BiOBr (NMT/B) Z type heterojunction composite materials with different content by using ionic liquid as bromine source assisted solvothermal method. In visible light , the photocatalytic activity of the materials was analyzed by degradation of tetracycline. Characterize the prepared composite material by XRD , FTIR, SEM, TEM, XPS , UV–vis diffuse reflection spectra (DRS). The result proved that the NH2-MIL-125(Ti) (NMT) nanosheets were tightly loaded on the BiOBr surface. NMT/B composite materials showed higher catalytic activity than monomer materials. The removal rate of TC reached 88% in 90min, which was 3 times and 5.7 times that of the monomer NMT and BiOBr monomer materials, respectively. In the catalytic process, –O 2 - and h + are the main active substances that degrade pollutants. This is proved by free radical capture experiments. It could be inferred that the improved photocatalytic activity of NMT/B composites was contributed to the good energy band structure and the formation of Z-type heterojunctions in close contact, which greatly facilitates the photogenerated carrier and hole migration and dissociation. Cycle experiment proved that the prepared composite material has excellent stability, which indicated that it had a good prospect in practical applications.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2021
·
IF 5.302
Xiangzhao Zhang,Puhao Xu,Xinyue Wu,Xinyi Gui,Guiwu Liu,Mingfen Zhang,Haining Meng,Guanjun Qiao
The wetting of ZrB 2 ceramic by molten pure Cu, Cu-(20, 30, 40, 50 at.%)Ti alloys were performed by the sessile drop method under vacuum of ∼4 × 10 −4 Pa in the 1030−1070 °C temperature range. The wetting and interfacial behaviors of Cu-Ti/ZrB 2 systems were analyzed and discussed. Furthermore, the work of adhesion and electronic properties of the Cu(1 1 1)/ZrB 2 (0 0 0 1) and Ti(0 0 0 1)/ZrB 2 (0 0 0 1) atomic interfaces were quantitatively evaluated by first-principles method. The wettability is significantly improved with the Ti concentration or wetting temperature increasing as a result of the formation of (Ti) solid solution at interface. The calculated results show that the B-terminated ZrB 2 (0 0 0 1) surface is preferable to bond with Ti(0 0 0 1) surface, and the electronic structure reveals that the dominant interfacial bonding is the Ti-B ionic bond for the Ti/B-terminated ZrB 2 interface.
研究领域:
材料科学
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表面科学
·
计算材料学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2016
·
IF 8.328
Yanghe Fu,Long Sun,Huan Yang,Lai Xu,Fumin Zhang,Weidong Zhu
The Ni-doped NH 2 -MIL-125(Ti) catalyst was developed for the photocatalytic aerobic oxidation of aromatic alcohols upon visible light irradiation. The results show that different aromatic alcohols can be effectively transformed to their corresponding aldehydes with almost absolute selectivity using O 2 as the oxidant over Ni-doped NH 2 -MIL-125(Ti) upon visible light irradiation. Compared with the parent catalyst NH 2 -MIL-125(Ti), Ni-doped NH 2 -MIL-125(Ti) exhibits a significantly enhanced photocatalytic activity for the selective oxidation of aromatic alcohols. Preliminary studies indicate that the doping of Ni nanoparticles into NH 2 -MIL-125(Ti) could improve the visible-light harvesting, charge-separation, and electron-transport of the resultant catalyst, leading to the enhanced photocatalytic activity. The current work provides some guidance in the development of MOF-based photocatalysts for organic syntheses.
研究领域:
材料化学
·
有机合成
·
光催化
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Lu Wen,Chaojie Li,Houqun Xiao,Huazhou Hu,Chaobin Lai,Luocai Yi,Qingjun Chen
The ZrCo alloy stands out as one of the most promising candidates for hydrogen isotope storage materials in nuclear fusion, owing to its extremely low equilibrium hydrogen pressure (10 −3 Pa, 20 ℃). However, ZrCo experiences severe disproportionation reactions during dehydrogenation/hydrogenation processes, which lead to significant performance degradation. To address this, we have introduced V and Ti into the ZrCo alloy, resulting in the Zr 0.8 V x Ti 0.2-x Co (x = 0–0.15) series. Our research indicates that the addition of V and Ti reduces the lattice parameters, thereby increasing the platform pressure for hydrogen desorption and decreasing the enthalpy and entropy of the desorption reaction. This modification allows for a lower desorption temperature and enhances the alloy's resistance to hydrogen-induced degradation. Remarkably, the hydrogen storage capacity of the Zr 0.8 V x Ti 0.2-x Co(x = 0–0.15) alloys remains stable after 19 h of desorption. Furthermore, the Zr 0.8 V 0.05 Ti 0.15 Co alloy demonstrates exceptional cycling stability, retaining over 99 % of its hydrogen storage capacity after 50 cycles. First-principles calculations have clarified the adsorption energies of hydrogen at different binding sites, revealing the following order of stability: E b(Ti-V) < E b(Zr-Ti) < E b(V-Zr) < E b(Zr-Zr) . The hydrogen absorption and desorption kinetics of the Zr 0.8 V x Ti 0.2-x Co alloys follow the trend: Zr 0.8 V 0.15 Ti 0.05 Co > Zr 0.8 V 0.1 Ti 0.1 Co > Zr 0.8 V 0.05 Ti 0.15 Co > ZrCo, indicating optimized performance with the introduction of V and Ti. This study not only provides a viable solution to the disproportionation issue in ZrCo alloys but also offers valuable insights into the design of high-performance hydrogen isotope storage materials for nuclear fusion applications.
研究领域:
材料科学
·
核聚变工程
·
金属氢化物
·
储氢材料
·
物理化学
·
计算材料学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Cleaner Production
·
2020
·
IF 7.246
Bao Liu,Kexuan Lyu,Yongqiang Chen,Baozhong Ma,Chengyan Wang
Manganese electrodeposition experiments were performed in an anion-exchange membrane (AEM) electrolysis reactor using Ti/IrO 2 –RuO 2 –SiO 2 anode. The influence of Mn 2+ concentration, cathode current density (CCD), (NH 4 ) 2 SO 4 concentration, SeO 2 concentration and electrolysis time on the cell voltage (CV), cathode current efficiency (CE) and specific energy consumption (SEC) of manganese electrodeposition was investigated. The crystalline structure, chemical composition and morphology of the deposited manganese metal and the generated dark mass were analyzed using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscopy (FESEM) and energy dispersive spectroscopy (EDS) measurements. The obtained results reveal that the crystalline structure of the deposited manganese metal was α-Mn. The dark mass of MnOOH would be generated and precipitated on the surface of the cathode, inhibiting the electrodeposition of manganese metal when the operating condition was not well controlled. Considering the CE, SEC and environmental aspect, the operating condition of Mn 2+ concentration = 30 g L −1 , CCD = 350 A m −2 , (NH 4 ) 2 SO 4 concentration = 110 g L −1 and SeO 2 concentration = 0.03 g L −1 was regarded as the best condition for manganese electrodeposition. Under this condition, the CE was 78.3% and the SEC was 4346–4433 kW h t −1 after electrolyzing for 24 h. Compared with the traditional approach, the CE increased by about 10% and the SEC decreased by about 27%. In addition, the electrolytic manganese anode slime was not generated during the manganese electrodeposition process . This approach is recommended as it will reduce the energy consumption and the quantities of solid waste discharge of manganese electrodeposition.
研究领域:
材料科学
·
电化学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）