Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Wen Leng,Jiaopeng Lai,Cao Yang,Yanpeng Zhu,Jian Wang,Lihui Yang,Sihao Lv
ABSTRACT Interface engineering is an effective strategy for improving the catalytic activity of electrocatalysts. Herein, an enhanced binder-free Ti 4 O 7 electrode doped with waste MOF-recycled N-doped carbon polyhedrons (Dr-CN) was developed and denoted as Dr-CN@Ti 4 O 7 . The chemical-bond formation at the interface of Ti 4 O 7 and Dr-CN led to a significant acceleration of charge transfer and higher •OH yield at 1.55-2.75 times rate in comparison with pristine Ti 4 O 7 . At 0.5%Dr-CN@Ti 4 O 7 electrode, the oxidation rate of tetracycline (TCH) was about 3 times that of pristine Ti 4 O 7 , especially when doped with 2 wt% Dr-CN, the kinetic rate can be comparable to that of BDD electrode. Furthermore, the 0.5%Dr-CN@Ti 4 O 7 anode exhibited desirable stability and durability in consecutive 20 cycle tests and was shown to effectively mineralize refractory organic matters in actual livestock and coking wastewater. Energy consumption for TCH removal by 0.5%Dr-CN@Ti 4 O 7 electrode was calculated as 3.02 kWh m -3 , with a 73.5-77.6% reduction compared to some previous electrodes. These results suggested that the interface chemical-bonded engineering strategy via doping MOF-derived carbon can effectively improve the Magnéli-phase Ti 4 O 7 electrode with satisfying electrochemical reactivity and stability.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2024
·
IF 4.3
Bei Wang,Weida Wang,Weidong Wu,Tingting Zhang,Changxiong Zou,Tan Wang
In this study, Ti 4 O 7 /PrFeO 3 particle electrodes were effectively synthesized through a sol-gel combined pyrolysis method and utilized as particle catalysts within an innovative 3D photo-electrochemical reactor (3D-PEC) to evaluate their efficacy in degrading yellow drugs present in mineral processing wastewater. The morphology, bonding characteristics, and crystalline phase composition of the Ti 4 O 7 /PrFeO 3 particle electrode were analyzed using X-ray diffraction (XRD), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS). The findings indicated that titanium suboxide was effectively integrated onto praseodymium ferrite, resulting in a Ti 4 O 7 /PrFeO 3 particle electrode exhibiting a hierarchical pore structure, substantial dimensions, reduced photoluminescence (PL) intensity, a wealth of active sites, and enhanced photoelectrocatalytic efficiency. At a dosage of 0.25 g/L, with an initial concentration of 50 mg/L, a starting pH of 7, an electrolyte concentration of 0.2 mol/L, a light intensity of 0.68 × 10 5 lux, and a 3 cm electrode distance. the degradation rate of the yellow drug achieved 98.90%, and the removal of COD and TOC reached 85.45% and 81.63%, respectively. The experimental findings indicate that the Ti 4 O 7 /PrFeO 3 particle electrode has good stability, exhibits excellent photoelectrocatalytic performance, and efficiently degrades wastewater containing the yellow drug.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Yang Li,Yuchang Qing,Biao Zhao,Pengwei Bai,Rui Zhang,Haoyang Yao,Fa Luo
There are few reports on the application of Magnéli Ti 4 O 7 in the field of electromagnetic wave absorption. Herein, we designed and prepared a Ti 4 O 7 /magnetic metal composite via an electrostatic assembly with in-situ reduction reaction. This system utilized distinct magnetic coupling deriving from the subtle designed structures and magnetic-dielectric synergy. The core-shell magnetic metallic nanoparticles/oxygen deficient Ti 4 O 7 are useful microwave absorbers in terms of wide broadband, strong absorption and ultra-low filler amount. The optimal reflection loss of Ti 4 O 7 @CoNi composite was −43.6 dB at 2.5 mm, meanwhile the effective absorbing band could reach over 5.12 GHz at only a 2.7 mm thickness. The results confirm that the dependence of the electromagnetic characteristics of the absorber on the filler ratio, frequency, and absorber thickness. Therefore, this work may be beneficial in constructing core-shell structured magnetic metal/Magnéli Ti 4 O 7 composites to tune electromagnetic parameters and strengthen electromagnetic absorption.
研究领域:
材料科学
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电磁学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Shuting Guo,Qiongfang Zhuo,Gang Huang,Liying Lan,Tongyin Zhu,Wenlong Wang,Zehong Yang,Jiasheng Fang,Yongfu Qiu,Bo Yang
Imidacloprid (IMD) is a kind of neonicotinoid insecticide, which is widely used in the agricultural production. There are few reports on electrocatalytic degradation of IMD with the low concentration. In this study Ti 4 O 7 -C 3 N 4 electrode was employed for the first time to electrocatalytically degrade low concentration IMD. Compared with pure Ti 4 O 7 electrode, the oxygen evolution potential was increased from 1.84 V to 2.50 V, the charge transfer resistance (R ct ) was reduced by 66.05 %, and the oxygen vacancies were increased by 2.5 times compared to the original Ti 4 O 7 . Especially, the R ct for Ti 4 O 7 (5.45 Ω·cm 2 ) was only 1/7 of that for boron-doped diamond (BDD) (38.89 Ω·cm 2 ). IMD degradation ratio was up to 98 % in only 1.256 min (75.360 s) using a Ti 4 O 7 -C 3 N 4 . When SongShan Lake water, Wanjiang water, and secondary effluent were treated, the degradation radios of IMD were 70.30 %, 72.33 % and 81.12 %, respectively. In the presence of Cl − coexisting ions, no disinfection by-product of ClO 4 − was detected, which is an advantage for Ti 4 O 7 -C 3 N 4 compared with BDD. The first and 48th degradation ratios were 99 % and 97 %, respectively, indicating the good stability of Ti 4 O 7 -C 3 N 4 . The development of Ti 4 O 7 -C 3 N 4 provides a stable, low energy consumptions and no secondary pollution anode for the treatment of actual wastewater.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Energy Storage Materials
·
2021
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IF 17.789
Linlin Ma,Li-Juan Yu,Jingchong Liu,Ya-Qiong Su,Shuai Li,Xiaohuan Zang,Tao Meng,Shuaihua Zhang,Jianjun Song,Jiangyan Wang,Xiaoxian Zhao,Zhimin Cui,Nü Wang,Yong Zhao
As the desired sulfur host of lithium-sulfur battery, the strong polarity and fast electron migration capability are indispensable for achieving effective adsorption and conversion of lithium polysulfides (LiPSs), that is, restricting the shuttle effect. Herein a porous microdisk Ti 4 O 7 /TiN/C heterojunction with strong polar N-Ti-O covalent bonds is precisely constructed. Compared with O-Ti-O or N-Ti-N bond in single Ti 4 O 7 or TiN , the N-Ti-O bond with stronger polarity could adsorb and bond with S and Li atoms in LiPSs, which is beneficial for LiPSs adsorption. Beside, the Ti 4 O 7 /TiN heterostructure favors the electron transfer , which could promote the conversion of LiPSs. The design strategy is to construct abundant polar N-Ti-O bonds at Ti 4 O 7 /TiN heterogeneous interface that would realize the associative process of LiPSs adsorption, trapping, and conversion, thereby restraining the shuttle effect efficiently. In the current study, as the host of the sulfur cathode, the porous microdisk TiN/Ti 4 O 7 /C heterojunction exhibits a high specific capacity of 1204.5 mAh g −1 at 0.2 C, and a high specific capacity of 616.5 mAh g −1 at an ultrahigh current density of 4 C. In addition, 86.4% and 116.9% capacity are retained over 1000 cycles at 1 C and 2 C, respectively. This strategy provides an insight into developing lithium-sulfur battery with extraordinary performance, and opens promising routes to design the next-generation electrochemical energy storage devices.
研究领域:
材料科学
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电化学能源存储
✓ 已验证
DOI
高影响因子
Frontiers in Energy
·
2022
·Vol. 16
·期 5
·852-861
·
IF 2.964
Li Yonghuan,Song Wei,Jiang Guang,Yang Yue,Yu Hongmei,Shao Zhigang,Duan Fangwei,Yang Yingxuan
Fuel starvation can occur and cause damage to the cell when proton exchange membrane fuel cells operate under complex working conditions. In this case, carbon corrosion occurs. Oxygen evolution reaction (OER) catalysts can alleviate carbon corrosion by introducing water electrolysis at a lower potential at the anode in fuel shortage. The mixture of hydrogen oxidation reaction (HOR) and unsupported OER catalyst not only reduces the electrolysis efficiency, but also influences the initial performance of the fuel cell. Herein, Ti 4 O 7 supported IrO x is synthesized by utilizing the surfactant-assistant method and serves as reversal tolerant components in the anode. When the cell reverse time is less than 100 min, the cell voltage of the MEA added with IrO x /Ti 4 O 7 has almost no attenuation. Besides, the MEA has a longer reversal time (530 min) than IrO x (75 min), showing an excellent reversal tolerance. The results of electron microscopy spectroscopy show that IrO x particles have a good dispersity on the surface of Ti 4 O 7 and IrO x /Ti 4 O 7 particles are uniformly dispersed on the anode catalytic layer. After the stability test, the Ti 4 O 7 support has little decay, demonstrating a high electrochemical stability. IrO x /Ti 4 O 7 with a high dispersity has a great potential to the application on the reversal tolerance anode of the fuel cell.
研究领域:
电化学
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能源材料
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燃料电池
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催化化学
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电极工程
✓ 已验证
DOI
高影响因子
Water
·
2024
·Vol. 16
·期 24
·3579
·
IF 3
Qiujie Qian,Pingzhong Xiao,Tinghui Du,Demin Xu,Chuanshuo Guo,Yue Guan,Minxuan Yan,Feihong Wang,Yonghao Zhang,Yan Li
With the growing demand for high-quality discharge, reverse osmosis (RO) technology has been widely applied in landfill leachate treatment; however, the problem of reverse osmosis concentrates (ROCs) has worsened. In this work, a Ti4O7-nanotube reactive electrochemical membrane (Ti4O7-NT-REM) was employed to treat ROCs from landfill leachate treatment. The effects of current density, flow rate and pH on COD removal were evaluated, and the appropriate conditions were a current density of 20 mA cm−2, a flow rate of 10 mL s−1and a pH of 7. Under these conditions, COD, TOC, NH4+-N and NO3−-N were removed by 82%, 68%, 100% and 73%, respectively. In addition, the 3D-EEM fluorescence spectra and GC–MS results revealed that the organics significantly decreased after 120 min of treatment, and aliphatic compounds were the major organic compounds. The stable performance of the REM was illustrated by cyclic treatment (20 cycles) with the assistance of cathodic polarization. In addition, a long service lifetime of 267.3 h and a low energy consumption of 7.6 kWh·kg COD−1were obtained by related testing and evaluation. The excellent and stable performance confirmed that the Ti4O7-NT-REM has broad application prospects in the treatment of ROCs.
研究领域:
环境科学
·
废水处理
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Yuxiang Wei,Dekai Wu,Chaoyou Yong,Zhenni Wang,Peng Zhong,Jiajun Qiu,Jiatong Fan,Jie Sun,Yimin Lei,Xiaoqiang Wu
Electrocatalysts play an important role in the cathodic Oxygen Reduction Reaction (ORR) of fuel cells. Because of the high cost, poor cycle stability and methanol tolerance, the commercial Pt/C catalysts have been seriously restricted during large-scale application and development in electrochemical devices. The development of non-noble metal ORR catalysts is one of the effective ways to achieve fuel cell cost reduction and performance improvement at the same time. In this work, Ti 4 O 7 /MXene nanocomposites were synthesized through hydrothermal followed by carbothermal reduction reactions. Such catalysts exhibit large electrochemical active surface area (ECSA = 215.74 cm 2 ) and excellent ORR catalytic activity in alkaline media. The initial potential and half-wave potential were confirmed to be 0.91 V and 0.72 V with the electron transfer number of 3.3. In addition, the Ti 4 O 7 /MXene catalysts have better cyclic stability and methanol tolerance than commercial Pt/C catalyst. This study provides a new idea and method for the innovative preparation of MXene-based composite electrocatalysts.
研究领域:
材料科学
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电化学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Xiaopan Qiu,Haoran Kong,Yuting Li,Qinhuan Wang,Yu Wang
Solar-driven interfacial evaporation provides a feasible and sustainable way to solve the fresh water shortage using abundant solar energy and has recently attracted considerable attention. However, it has been limited by the evaporation rate and solar-heat conversion efficiency of the current materials. Herein, a novel Ti4O7 membrane with synergetic photothermal and electrothermal effects was developed using a straightforward in situ approach. Based on interface engineering, the interface between the surface of the membrane and water was hydrophobically modified, and a thermal insulation layer was added to the bottom of the membrane. The optimized self-floating membrane with excellent sunlight absorbability and conductivity achieved a remarkably high evaporation rate of 7.51 kg m–2 h–1 with a voltage of 3 V as compensation under one-sun irradiation (1 kW m–2). Moreover, the bilayered membrane displayed efficient salt ion rejection, and the collected water can meet the World Health Organization (WHO) standard required for potable water.
研究领域:
材料科学
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环境科学
·
能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Xiang Liu,Mingxue Xiang,Peiduo Zhao,Zhixin Wang,Yu Wang
Osmotic energy is a promising clean and sustainable resource for osmotic power generation. However, scaling up reverse electrodialysis technology for osmotic energy harvesting is constrained by limited output power density, primarily due to the dependence of passive ion transport on the concentration gradient. Interfacial solar evaporators yield freshwater and highly concentrated brine. But inevitable heat losses reduce the solar energy utilization efficiency. This study was to construct a multilayer mesh composite membrane with tunable pore sizes via Ti 4 O 7 ceramic fibers and nanocellulose fibers, which adaptable to varying salt concentration environments. Solar radiation can be introduced for seawater desalination coupled with the osmotic energy conversion process to achieve more efficient solar energy utilization. The nanoconfined domains within the multilayer composite membrane enable an efficient interfacial solar water evaporation at a rate of 5.97 kg m −2 h −1 . The effective utilization of heat conduction energy losses elevates the osmosis power generation density to 7.60 W m −2 , which is increased by 198 % compared to conventional device models. This provides a novel design approach for applying ceramic fibers in osmosis power generation and for developing efficient, integrated freshwater-electricity cogeneration systems.
研究领域:
材料科学
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能源科学
·
环境工程
·
纳米技术
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可持续能源
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膜科学与技术
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Communications
·
2023
·
IF 3.8
Xinwei Geng,Yongfeng Xia,Hanqin Liang,Dongxu Yao,Yu-Ping Zeng
Magnéli phase ceramics have gained extensive attention in a variety of fields, including batteries, electrocatalysis , and wastewater treatment, due to their distinctive properties. In this study, high-performance Magnéli phase Ti 4 O 7 ceramics were synthesized by in-situ hot-pressed sintering of titanium (Ti) and titanium dioxide (TiO 2 ) in a single step. The effects of the sintering temperature and Ti content on the phase transformation and morphology of ceramics were investigated. Moreover, the mechanical properties and electrical conductivity of the samples were systematically characterized. Results show that the sample with the Ti/TiO 2 weight ratio of 0.09 sintered at 1000 °C has impressive comprehensive properties, including a high bulk density of 4.281 g·cm −1 , a mean value of flexural strength of 125.58 MPa, and an excellent conductivity of 1129 S·cm −1 . Furthermore, an evolution mechanism of the in-situ sintering for Ti/TiO 2 was discussed based on the experimental data, and the pattern of variation observed by samples can be reasonably explained.
研究领域:
材料科学
·
陶瓷
·
电化学
·
机械工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Catalysis
·
2024
·
IF 11.3
Yufeng Qin,Yifan Wang,Rou Wen,Longxiang Wang,Meiling Dou,Feng Wang
The need to use expensive and scarce Ir-based catalysts in the oxygen evolution reaction (OER) hinders the large-scale application of proton exchange membrane water electrolysis (PEMWE). Herein, we present an effective interface-engineering strategy to boost the efficacy of low-Ir catalysis of OER by means of electron transfer and lattice oxygen stabilization at the catalyst–support interface by utilizing a highly conductive (∼960 S cm–1) Ti4O7 support to strongly anchor IrO2 nanoparticles. Experimental and theoretical calculations suggest that Ti4O7 tailors the Ir electronic structure that results from the formation of Ir–O–Ti bonds at the IrO2–Ti4O7 interface, resulting in a lowered d-band center that weakens the adsorption of oxygen intermediates on Ir sites and thus boosts OER catalysis. The Ir–O–Ti bonds formed at the interface stabilize lattice oxygen in IrO2, facilitating a stable lattice oxygen mechanism path for OER catalysis. The interface effect results in superior OER activity with an overpotential of 244 mV at 10 mA cm–2 and a high mass activity of 1342.9 A gIr–1 (93.25× that of commercial IrO2), and the material also shows better durability than commercial IrO2. This interface-engineering strategy affords a strong catalyst–support interaction and should facilitate the design of high-performance catalysts for PEMWE applications.
研究领域:
催化
·
材料科学
·
电化学
·
能源材料
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）