CANADIAN JOURNAL OF CHEMICAL ENGINEERING
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2022
·Vol. 100
·期 9
·2417-2431
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IF 2.5
Hsiwen Wu,Xijun Hu,Minhua Shao,Shuwei Zhang,Guohua Chen
The lithium–sulphur battery is a promising system for next-generation energy storage because of its high energy density and the abundant supply of sulphur. In this study, Magnéli phase Ti 4 O 7 nanotube arrays (NTA) were grown on titanium nitride mesh substrates via anodization of titanium mesh followed by high-temperature reduction under a hydrogen atmosphere. When prepared into a composite material with sulphur via electrodeposition, Ti 4 O 7 NTA provides sulphur with high electronic conductivity and strong polysulphide chemisorption during battery operation. The structure of NTA allows sufficient access of incorporated sulphur to the liquid electrolyte and supports high sulphur loadings per unit area of the electrode. The application of an additional layer of conductive carbon coating to confine electrodeposited sulphur inside the NTA further improved the cell cycling performance. Under sulphur loadings of around 2.0 mg/cm 2 , high values of specific capacity (1604 mAh/g at a 1/20 C rate), ultra-low capacity decay rate (0.03% per cycle for 1800 cycles), and versatile rate capability (660 mAh/g at 2 C and 500 mAh/g at 4 C) were achieved. Under high sulphur loadings of around 5.0 mg/cm 2 , stable cycling (decay rate below 0.10% per cycle) and high areal capacity (4.97 mAh/cm 2 ) were attained.
研究领域:
材料科学
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能源存储技术
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DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2023
·
IF 6.6
Jingjing Li,Longjiang Lian,Simin Chen,Bing Lei,Xin Yuan,Zhiyuan Feng,Guozhe Meng,Liang Jia,Zhi Long
Searching for an optimal material additive that can enhance both the cathodic protection and barrier properties of zinc-rich epoxy coatings (ZRE) simultaneously remains a significant challenge nowadays. In this study, mesoporous Ti 4 O 7 particles with high conductivity and chemical inertness were synthesised via the thermal reduction method and added to ZRE coating. The impact of different Ti 4 O 7 filler contents on the corrosion resistance of ZRE coating containing 70 wt% zinc was assessed by electrochemical analysis , water uptake measurements, salt spray test and material characterisation techniques . The results demonstrated that the incorporation of mesoporous Ti 4 O 7 significantly enhances the initial cathodic protection and long-term barrier properties of ZRE. The primary mechanism involves the conductive Ti 4 O 7 ameliorating the Zn isolation caused by non-conductive Zn corrosion products and fostering a more efficient network for conductive penetration between zinc particles to improve cathodic protection efficacy. Moreover, mesoporous Ti 4 O 7 promotes the uniform deposition and growth of ZnO/Zn(OH) 2 by adsorption and anchoring of Zn(OH) 4 2− and changes the shape of the corrosion product (columnar), thus improving the barrier performance of ZRE coating.
研究领域:
材料科学
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腐蚀与防护
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DOI
高影响因子
Water Resources and Industry
·
2023
·
IF 5.1
Yonghao Zhang,Yating Song,Liu Liu,Jie Zhang,Zhaoyi Zhang,Qian Li,Jing Yang,Wen Li,Lulu Huang,Xue Li,Yulei Zhang,Qiangshun Wu,Xuejie Guo
In this study, porous Ti/Magnéli Ti 4 O 7 nanotube arrays (NTA) was fabricated to pretreat antibiotic wastewater. Characterization of the Ti 4 O 7 -NTA illustrated that highly ordered NTA was successfully generated on the porous Ti substrate, which enlarged the specific surface area by 1.67 times. The Ti 4 O 7 -NTA has a high oxygen evolution potential (2.60 V) as well as low interfacial charge transfer resistance (4.479 Ω cm −2 ). Ceftriaxone sodium (CRO) was completely removed from raw antibiotic wastewater after 3 h of treatment by the Ti 4 O 7 -NTA, under optimal operation conditions. The biodegradability and toxicity of the wastewater were also significantly enhanced and reduced, as the BOD/COD and EC 50,48h values were increased to 0.48 and 57.62 % ± 2.16 %, respectively. The possible degradation pathway of CRO was proposed by LC‒MS. Cathodic polarization was proven to be an effective way to ensure the long-term durability of the Ti 4 O 7 -NTA.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Sheng-Nan Li,Shu-Xian Zheng,Zi-Xuan Zheng,Yu Ling,Hai-Ming Wu,Hai Liu
The widespread use of chlorination prompts the selection of chlorine-resistant bacteria in drinking water, posing a great threat to public health. Herein, according to sequential electrochemical oxidation/reduction (Ox/Red) processes with a flow-through mode, electrochemical devices (ED) with sequential Ox-Red, Red-Ox and Ox-Red-Ox processes were coupled with chlorination (AC) to evaluate their synergistic effects and mechanisms for inactivation of chlorine-resistant bacteria in drinking water. ED/AC enabled ∼ 3.0 log of synergistic effect and ∼ 2.5 times lower energy consumption for inactivation of various chlorine-sensitive/-resistant bacteria and gram-positive/-negative bacteria in DI and tap waters. Especially, ED/AC with Ox-Red-Ox device exhibited the best disinfection performance with achieving over 6.7 log inactivation of Bacillus cereus at 4.0 V and 0.5 mg/L-Cl 2 as compared with ED alone (∼1.25 log) and AC (∼2.67 log) disinfection. The electrochemical oxidation on Ti 4 O 7 -based anode promoted the generation of free chlorine radicals and H + ions, which was accompanied with the formation of neutral HClO molecules. Characterizations of SEM and flow cytometer suggested that oxidative species of neutral HClO molecules and free chlorine radicals enhanced the bacterial inactivation via severe damages of cell structures. This work provided a promising strategy via coupling electrochemical oxidation and chlorination for eliminating chlorine-resistant bacteria in drinking water.
研究领域:
环境科学
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微生物学
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DOI
高影响因子
DESALINATION
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2024
·
IF 8.3
Xinye Xu,Qi Zhao,Qi Liu,Junxiao Qiu,Jinhao Li,Wenqian Zheng,Jie Cao,Lina Wang,Wen Wang,Shutong Yuan,Anni Fu,Hanjun Yang,Chuanyi Wang,Jingkun Xu,Baoyang Lu
Solar steam generation (SSG) via interfacial photothermal conversion has emerged in sustainable seawater desalination and sewage purification. One of the grand challenges is that low light absorption generally limits photothermal materials on water evaporation rates and insufficient on-board performance for real practice. Herein, we propose a “molecular/phase dual-locking” strategy to homogeneously composite Magnéli phases like Ti 4 O 7 nanoparticles and poly(vinyl alcohol) (PVA) by chemical-physical bi-crosslinking. As-obtained Ti 4 O 7 -PVA nanocomposite hydrogels (TPNHs) exhibit a narrow bandgap (~0.81 eV) for highly efficient sunlight absorption all through UV–vis–NIR full-spectrum wavelengths (up to ~99.56 %) and enable a record high evaporation rate of ∼4.45 kg m −2 h −1 with outstanding energy efficiency (~90.69 %) under one sun irradiation. A 20−day continuous test in real seawater manifests excellent long-term performance stability of TPNHs without salt accumulation. We further demonstrate the SSG efficacy of such hydrogels by applying them for efficient desalination/purification of varying seawater and sewage samples with low-to-high salinity, strong acids/bases, heavy metal ions, and organic dyes. This “molecular/phase dual-locking” design strategy and resultant Ti 4 O 7 -PVA nanocomposite hydrogels present a promising methodology to boost practical applications for seawater desalination and sewage purification.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
BIOMASS & BIOENERGY
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2026
·
IF 7
Dongxin Jin,Linhan He,Yao Chen,Yongming Fan
Green synthesis of high-purity Ti 4 O 7 with ultrahigh surface area using lignin. • Lignin inhibits sintering and endows Ti 4 O 7 with hierarchical porous structure. • Ti 4 O 7 @Co(OH) 2 shows excellent lignin electrocatalytic oxidation performance. • Lignin flow fuel cell reaches 5.19 mW/cm 2 peak power density. • This work promotes lignin valorization and green electrode preparation. Ti 4 O 7 is a highly promising electrode material for lignin electrocatalytic conversion and fuel cells owing to its high electrical conductivity, excellent electrochemical stability, and acid–alkali resistance. However, Ti 4 O 7 synthesized by conventional carbothermal reduction suffers from severe sintering, low specific surface area, and insufficient active sites, which hardly meet the requirements for high-efficiency electrocatalysis. This work employs lignin as both a carbon source and a pore-forming precursor. The in-situ pore generation and steric hindrance effect during lignin pyrolysis and carbonization suppress particle agglomeration in high-temperature reduction, enabling the preparation of Ti 4 O 7 with high purity and large specific surface area. Transition metal hydroxides were loaded via electrochemical deposition to construct transition metal hydroxide-modified Ti 4 O 7 -based composite electrodes, which significantly optimize surface active sites and electrocatalytic reaction kinetics. The results demonstrate that the as-prepared Ti 4 O 7 exhibits a purity of 96% and a specific surface area as high as 226.7 m 2 /g, far exceeding the product reduced by traditional carbon black. Among all Ti 4 O 7 -based composite electrodes, the Co(OH) 2 -modified sample displays the optimal lignin electrocatalytic oxidation performance, with an oxidation onset potential of 0.12 V (vs Hg/HgO) and a Tafel slope as low as 173.57 mV/dec. The assembled lignin flow fuel cell delivers a peak power density of 5.19 mW/cm 2 and a limiting current density of 25.2 mA/cm 2 , showing no obvious performance degradation after 8 h of continuous operation. This work provides experimental evidence for the green and controllable preparation of high-specific-surface-area Ti 4 O 7 , high-value utilization of lignin, and development of high-performance biomass fuel cells. Download: Download high-res image (414KB) Download: Download full-size image
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DOI
高影响因子
Catalysis Science & Technology
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2026
·
IF 4
Qingqing Ye,Jiahao Wang,Feifei Fang,Yinglong Yu,Jun Man,Yufeng Qin,Yanfei Wang,Meiling Dou,Feng Wang
Exploring efficient oxygen evolution reaction (OER) electrocatalysts is critical for improving the performance of alkaline water electrolyzers (AWEs). Nickel–iron layered double hydroxide (NiFe-LDH) is regarded as a promising candidate but suffers from intrinsically low electrical conductivity that restricts charge transfer during OER catalysis. Herein, we present a facile and scalable strategy to fabricate a NiFe-LDH/Ti4O7 composite OER catalyst by integrating highly conductive Magnéli-phase Ti4O7 with NiFe-LDH, serving as the anode of AWE. The resulting composite preserves the flower-like morphology of pristine NiFe-LDH while achieving a high electrical conductivity of 0.81 S cm−1. Electronic structure analysis shows that the work function difference between NiFe-LDH and Ti4O7 generates a built-in electric field at the heterointerface, driving electron transfer from NiFe-LDH to Ti4O7, which induces band gap narrowing for NiFe-LDH/Ti4O7, thereby accelerating charge transport and thus boosting OER kinetics. The optimal composite displays a high OER activity with an overpotential of 262 mV at 10 mA cm−2, outperforming pure NiFe-LDH (290 mV). When directly spray-coated onto a Zirfon membrane to form the catalyst-coated membrane (CCM), the assembled AWE operates a cell voltage of 1.66 V at a current density of 0.5 A cm−2, which is 40 mV lower than that of pure NiFe-LDH (1.70 V), and maintains stable performance for over 351 h. This work demonstrates that the integration with conductive Ti4O7 facilitates charge transfer in NiFe-LDH-based anodes, providing a strategy for the fabrication of high-performance electrodes for AWE application.
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Ming-Yue Wang,Hai Liu
Electrochemical oxidation and chlorination were integrated for i-phage inactivation. • The integrated ED/Cl 2 exhibited obvious synergistic effects for phage inactivation. • ED/Cl 2 lowered the required chlorine dosage and DBPs formation for phage inactivation. • Ti 4 O 7 -anode dominated phage inactivation via producing free radicals and neutral HClO. • ED/Cl 2 enhanced i-phage leakage and subsequent inactivation via damaging host cells. The presence of intracellular bacteriophages (i-phages) trapped inside host bacteria presents a formidable obstacle to drinking water disinfection, primarily because they exhibit markedly higher resistance than cell-free extracellular phages (e-phages). This work studied the inactivation of i-phages with an integrated electrochemical oxidation and chlorination (ED/Cl 2 ) system employing Magnéli phase Ti 4 O 7 -based anodes in a flow-through configuration that implemented a sequential oxidation-reduction-oxidation process. The results demonstrated that ED/Cl 2 system significantly promoted the inactivation of both e-phages and i-phages with obvious synergistic effects, especially achieving 3.8-log i-T4 inactivation and 2.7-log of synergistic effect at 5.0 V and 1.5 mg/L-Cl 2 as compared with the insignificant inactivation by the individual ED (0.3-log) and Cl 2 (0.8-log). Furthermore, this integrated approach reduced energy consumption by approximately 8.4–16.5 times compared to electrochemical treatment alone, and significantly lowered the chlorine dosage required to achieve phage inactivation levels comparable to chlorination alone, thereby reducing formation of disinfection by-products. The disinfection mechanisms were involved the generation of reactive chlorine radicals and neutral hypochlorous acid at the anode, which facilitated the oxidative injury to bacterial cellular structures for releasing i-phage and subsequent inactivation, as evidenced by flow cytometry, SEM and TEM analyses. The application potentials of the integrated ED/Cl 2 system were further validated in contaminated tap water, confirming it as a promising, energy-efficient strategy for controlling i-phages in drinking water treatment systems. Download: Download high-res image (116KB) Download: Download full-size image
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Peize Lyu,Wenzhao Sun,Bo Yang,Wanqi Chen,Ruolan Tang,Haile Yan,Zongbin Li,Song Li,Liang Zuo
Magnéli-phase Ti 4 O 7 exhibits broadband photothermal conversion but suffers from rapid oxidation to optically inactive TiO 2 , severely restricting its deployment in high-temperature solar-thermal systems. Here, we demonstrate that Al doping provides an effective dual-function strategy to simultaneously enhance the oxidation resistance and optical stability of Ti 4 O 7 while maintaining its intrinsic photothermal performance. Al-doped Ti 4 O 7 powders (0–10 at. %) were synthesized via hydrogen reduction, and their structural evolution, oxidation kinetics, and spectral responses were systematically evaluated under controlled oxidative environments (300–500 °C, 2–10 h). Al 3+ incorporation induces lattice distortion and electronic localization, which increase oxygen migration barriers and suppress electron-assisted oxidation. During annealing, Al–O–Ti species progressively transform into Al–O–Al–enriched surface layers, forming a robust diffusion barrier that significantly retards the Ti 4 O 7 → TiO 2 conversion. As a result, the 10 at. % Al-doped sample retains a high solar absorptance of 95.8% after 400 °C/10 h oxidation, outperforming undoped Ti 4 O 7 (92.2%). Moreover, controlled oxidation produces Ti 4 O 7 @TiO 2 core–shell structures with statistically enhanced near-infrared absorption arising from multiple interfacial reflections and scattering–induced phase accumulation. Kinetic analysis confirms reduced oxidation rates and increased activation barriers across the full temperature window. These results establish Al-doped Ti 4 O 7 as a durable, thermally stable photothermal material suitable for solar selective absorbing coatings, concentrated solar power receivers, and other high-temperature chemical engineering processes requiring long-term optical and structural robustness.
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高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2024
·Vol. 31
·期 32
·44983-44994
·
IF 0
Chen Junxia,He Xinyi,Lei Chongtian,Li Weigang,Yang Zhenzhen,Zhou Qing
Elemental doping is a promising way for enhancing the electrocatalytic activity of metal oxides. Herein, we fabricate Ti/ Ti 4 O 7 -CB-Ce anode materials by the modification means of carbon black and cerium co-doped Ti 4 O 7 , and this shift effectively improves the interfacial charge transfer rate of Ti 4 O 7 and •OH yield in the electrocatalytic process. Remarkably, the Ti 4 O 7 -CB-Ce anode exhibits excellent efficiency of minocycline (MNC) wastewater treatment (100% removal within 20 min), and the removal rate reduces from 100 to 98.5% after five cycles, which is comparable to BDD electrode. •OH and 1 O 2 are identified as the active species in the reaction. Meanwhile, it is discovered that Ti/ Ti 4 O 7 -CB-Ce anodes can effectively improve the biochemical properties of the non-biodegradable pharmaceutical wastewater (B/C values from 0.25 to 0.44) and significantly reduce the toxicity of the wastewater (luminescent bacteria inhibition rate from 100 to 26.6%). This work paves an effective strategy for designing superior metal oxides electrocatalysts.
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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DOI
PubMed
Journal of Materials Research and Technology-JMR&T
·
2024
·
IF 6.2
Yonglian Qiao,Lingxu Yang,Erwei Xie,Mengqi Luo,Le Wang,Chaoliu Zeng,Huijun Liu
Titanium alloy chemical milling wastewater contains a significant amount of ethylene glycol monobutyl ether (EGBE), which is toxic and difficult to be degraded by microorganisms, and the emission will lead to severe environmental pollution. To solve this problem, the electrocatalytic oxidation method was employed to remove EGBE in the wastewater, in which a porous Ti 4 O 7 /Ti electrode were prepared and employed as the anode, while stainless steel acted as the cathode. The effects of current density, interelectrode distance, and stirring mode on the COD removal rate were also investigated. Results show that the COD of the wastewater significantly decreases from 12410 to 15 mg L −1 after 16 h of electrolysis at 10 mA cm −2 and electrode spacing of 1.0 cm as well as aeration stirring at 100 mL min −1 . Moreover, pilot-plant scale testing reveals that the COD decreasing from 11980 to 183 mg L −1 after 24 h of electrolysis. Consequently, the utilization of porous Ti 4 O 7 /Ti electrode as anode in the electrocatalytic oxidation method presents significant potential in removal of EGBE in aviation industry wastewater.
研究领域:
环境科学
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电化学工程
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工业废水处理
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Jiaopeng Lai,Ruotao Zeng,Xinru Bian,Wen Leng,Cao Yang,Lihui Yang,Wei Li,Guangzhao Wang,Ganfeng He,Sihao Lv
Although the widely used dimensional stable anode (DSA) exhibits good activity and selectivity on chlorine evolution reaction (CER), the high content of precious metals and poor stability hinder the application. This work reported the use of interface engineering strategy to develop a cost-effective Ti 4 O 7 anode with ultralow Ru nanoparticles (NPs) loading (0.29 wt%) (Ru@Ti 4 O 7 ) via metal-support interactions. More oxygen vacancies were created by the interfacial Ru-O-Ti units and accelerated the reaction kinetics and charge transfer rate. 1 %Ru@Ti 4 O 7 displays superior CER activity, reaching a current density of 10 mA cm −2 at a low overpotential of 96.5 mV and a turnover frequency 16 times higher than DSA. The Ru@Ti 4 O 7 anode also achieved complete ammonia oxidation mainly mediated by chlorine radicals, with a high N 2 selectivity of 82 %. Particularly, the sustainable treatment for farm odor spray wastewater by the Ru@Ti 4 O 7 system was verified, in which the efficient purification of ammonia nitrogen and the good electrochemical stability of citric acid realized the recycling of water and deodorant. This work provides great opportunity to fabricate desirable Ti 4 O 7 –based CER electrodes and develops a good solution to the enormous challenges faced by the farm odor emission reduction industry.
研究领域:
材料科学
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环境工程
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电化学
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DOI
高影响因子
危险品化学品经营许可证（带存储）