CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Boyu Liu,Tengfei Wang,Qing Pang,Jun Yang,Haidong Liu,Hongyu Wang
To improve the energy density of s ingle-crystal LiNi 0.5 Co 0.2 Mn 0.3 O 2 (NMC523) by increasing the charging cut-off voltage presents a big challenge since the material degrades significantly at high voltage (>4.3V). A simple method to enhance the high-voltage electrochemical properties of single-crystal NMC523 was proposed by introducing a mesoporous TiO 2 coating and Ti doping. The specific discharge capacity for the modified NCM523-M-TiO 2 -0.5 sample achieves 182.81 mAh g −1 at a 0.1 C rate within the 3.0–4.5 V range. Furthermore, the capacity retention rate was 80.69 % after 200 cycles at a charge/discharge rate of 1 C, significantly higher than that of bare NCM523, which exhibited values of 181.36 mAh g −1 and 46.40 %. In detail, the mesoporous TiO 2 coating shields the cathode from the electrolyte, enhancing the stability at the interface and promoting the movement of lithium ions. Additionally, Ti doping increases lattice spacing and stabilizes the layered structure. This research will inform the design of high-performance cathode materials for Li-ion batteries.
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高影响因子
Journal of Energy Chemistry
·
2025
·
IF 14.9
Yinxuan Liang,Guohuang Kang,Yanru Liu,Jinhui Zhang,Yao Lv,Kangning Cai,Yilei Zhang,Feiyu Kang,Yidan Cao
Lithium-rich manganese-based cathode materials, as promising candidates for next-generation high-energy-density lithium-ion batteries due to their high specific capacity (>250 mAh g −1 ) and cost-effectiveness, are limited by severe capacity decay and voltage fade driven by irreversible structural transitions and oxygen release during cycling. Here, we report a Ti/Si dual-element modification strategy for cobalt-free Li 1.2 Ni 0.2 Mn 0.6 O 2 (LNMO) cathodes. The Ti/Si co-modified TS-LNMO cathode demonstrates superior structural stability and electrochemical performance. Bulk Ti 4+ doping stabilizes the oxygen framework via robust Ti–O bonds and enhances the lattice oxygen redox reversibility, while an in situ formed Li 2 SiO 3 layer suppresses interfacial side reactions, enhances lithium-ion diffusion, and prevents HF-induced erosion. As a result, the TS-LNMO cathode achieves 90% capacity retention after 200 cycles at 0.5 C and maintains ∼80% capacity in full cells cycled to 4.8 V. Additionally, the TS-LNMO cathode exhibits impressive rate performance even at a high rate of 5 C. This work offers an effective strategy for advancing cobalt-free, high-performance lithium-rich cathodes for sustainable energy applications.
研究领域:
材料科学
·
电化学
·
储能技术
·
锂离子电池
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高影响因子
Journal of Materials Chemistry A
·
2016
·Vol. 4
·期 30
·11949-11956
·
IF 8.262
Lian-Kui Wu,Xin-Yu Liu,Ji-Ming Hu
Ti-supported IrO2 or RuO2 oxide coated electrodes are widely used for the oxygen evolution reaction (OER) in acidic media. Electrocatalytic activity and long-term stability need to be further improved for these types of electrodes. A highly porous and well-adhered electrodeposited SiO2 (e-SiO2) film is proposed as the interlayer in this work to meet the above-mentioned requirements. The results show that the active oxide fully fills in the porous network throughout the whole thickness of the e-SiO2 film, to form “total-depth” highly porous oxide electrocatalytic coatings. For this reason, more than 1 order of magnitude higher apparent activity towards the OER at the Ti/e-SiO2/IrO2 (or RuO2) electrode is achieved compared to that of the conventional Ti/IrO2 or Ti/RuO2 electrode. Literature survey indicates that these novel electrodes are one of the most active Ti electrodes ever reported. The service life of this type of electrode is also obviously enhanced due to the “inter-locking” structure formed between the active oxide layer and e-SiO2 film.
研究领域:
电化学
·
材料科学
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高影响因子
CERAMICS INTERNATIONAL
·
2016
·
IF 2.758
Shunqin Luo,Chao Tang,Zhaohui Huang,Chen Liu,Jiawei Chen,Minghao Fang
In this study, bismuth oxyiodide/titanium dioxide (BiOI/TiO 2 ) heterostructures with different molar ratios of Bi and Ti were synthesized by electrospinning and hydrothermal methods . The samples thus synthesized were characterized by powder X-ray diffraction, scanning electron microscopy, transmission electron microscopy (TEM), high-resolution TEM, X-ray photoelectron spectroscopy, and ultraviolet–visible diffuse reflectance spectroscopy . The results confirmed the presence of the BiOI/TiO 2 heterojunction with Bi/Ti molar ratios of 0.20–1 by electrospinning and hydrothermal methods . Photocatalytic activity was also evaluated by the degradation of methylene blue (MB) under visible-light irradiation. The 80% BiOI/TiO 2 heterostructure exhibited the best photocatalytic activity for the degradation of MB under visible-light irradiation.
研究领域:
材料科学
·
环境科学
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Xuefeng Sha,Xianyin Song,Qiwei Shangguan,Yawei Lv,Fan Zeng,Xingang Zhang,Xueli Wu,Minghao Yu,Changzhong Jiang
MXene has emerged as a promising alternative to carbon-based capacitor materials since its inception, however, the current practical implementation still faces dual challenges: environmentally hazardous, time-consuming synthesis procedures and intrinsically low-concentration pseudocapacitive active sites. Herein, a short-duration, eco-friendly and high-efficiency double fluoride salt hydrothermal strategy was proposed to fabricate Ti 3 C 2 MXene with unparalleled electrochemical properties. A comprehensive and good balance, including rapid MAX phase etching, just-right titanium terminal water oxidation, and ammonia reduction activation, is achieved via a one-step NH 4 HF 2 hydrothermal reaction at 160 °C for merely 1 h (TOR-MXene). It drastically outperforms conventional HF acid etching at 60 °C for 48 h (P-MXene). Systematic experimental characterizations (HRTEM, SAXS, XPS, EXAFS, EPR and in-situ XRD, in-situ Raman) and DFT calculations consistently reveal that instead of the generally believed pore expansion, the abundant highly-reduced titanium dioxide nanoclusters anchored on the surface of MXene exhibit substantial pseudocapacitive activation, accompanied by the threshold Bader charge of Ti atoms exceeding 10.5 |e|. Consequently, the prepared TOR-MXene delivers a remarkable specific capacitance of 446.1 F g −1 even at the ultrahigh current density of 30 A g −1 , a sixfold improvement over the P-MXene of 74.8 F g −1 . Moreover, the TOR-MXene electrode displays around 91.2% capacitance retention over 50,000 cycles, showing an extremely high cycling stability. This strategy establishes atomic-level design principles for MXene-based energy storage, advancing efficient synthesis and performance optimization.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Nianwen Song,Jiangtao Qu,Bo Feng,Keyi Lv,Yanfei Wei,Xiaofei Yu,Lanlan Li,Xinghua Zhang,Xiaojing Yang,Rongkun Zheng,Yahui Cheng,Zunming Lu
Among non-precious metal catalysts, non-oxide materials often undergo surface oxidation under high-anodic potentials during the oxygen evolution reaction (OER), forming hydroxyl oxides or oxyhydroxides that serve as the true active phases with intrinsically higher activity. However, this structural transformation is frequently accompanied by surface relaxation, lattice distortion, or even partial collapse, leading to progressive degradation of catalytic stability, particularly under high-current-density operation, where long-term structural integrity is severely challenged. Enhancing the operational stability of such non-oxide catalysts is therefore a critical and unresolved challenge. In this work, we rationally doped Ti atoms into the Ni 3 S 2 lattice via a one-step solvothermal synthesis. Ti incorporation introduces low-coordinated metal sites that function as highly dispersed, atomically efficient active centers. These sites promote rapid deprotonation kinetics and lower the energetic barrier for O O bond formation, thereby significantly boosting intrinsic OER activity. The resulting catalyst delivers an overpotential of only 238 mV to achieve a current density of 10 mA cm −2 in 1 M KOH. Crucially, during electrocatalysis, the oxyphilic Ti dopants undergo controlled, sacrificial dissolution and act as “voltage buffers” that mitigate lattice strain and suppress irreversible oxidation of the Ni S framework under high anodic bias. This dynamic stabilization mechanism preserves the structural coherence of the catalyst, enabling stable operation at relevant current densities for over 400 h. Density functional theory (DFT) calculations corroborate the mechanism that confirms the preferential adsorption of OH* and O* intermediates at bridge and top sites associated with low-coordinated Ni atoms, and quantitatively reveal how Ti doping modulates the adsorption strength and coverage of key intermediates across applied potentials. Collectively, this study demonstrates a scalable, rational design strategy integrating targeted dopant selection, mechanistic understanding, and operando stabilization that advances non-oxide, non-noble metal catalysts toward practical water electrolysis applications.
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DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2021
·Vol. 10
·期 11
·6065-6072
·
IF 12.732
Junxiao Chen,Xue Fang,Zhouhong Ren,Weiye Qu,Xiaolei Hu,Zhen Ma,Liwei Chen,Xi Liu,Yaxin Chen,Xingfu Tang
Selective catalytic reduction (SCR) of NOx with NH3 has been widely used for NOx emission control, but commercial catalysts inevitably suffer severe deactivation in SO2-containing stack gases at low temperatures because the ammonium bisulfate (NH4HSO4, ABS) formed in SCR blocks the surface active sites. We resolve this issue by developing a TiO2-supported single-atom Mo catalyst (Mo1/TiO2) that decomposes ABS at ∼225 °C, far lower than the dew point of ABS (∼260 °C). Single Mo atoms paired with the neighboring surface Ti atoms function as Mo–Ti acid–base dual sites, which respectively adsorb the NH4+ and HSO4− of ABS. After the oxidation of NH4+ by surface lattice oxygen on the Mo sites, electrons left behind on the dual sites are localized around the Fermi level, which allows them to transfer to the adsorbed HSO4− on the Ti sites, thus releasing SO2 at low temperatures. The Mo1/TiO2 catalyst with Mo–Ti acid–base dual sites enables the decomposition of ABS at low temperatures, and thus this work provides a way to effectively control NOx emission particularly from industrial boilers.
研究领域:
环境科学
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催化化学
·
材料科学
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高影响因子
NANOTECHNOLOGY
·
2016
·Vol. 28
·期 5
·055403
·
IF 3.573
Aibin Huang,Jingting Zhu,Jianyun Zheng,Yu Yu,Yan Liu,Songwang Yang,Shanhu Bao,Lei Lei,Ping Jin
An anodized TiO2 interconnected network was fabricated and utilized as a mesoporous scaffold and electron transporter in perovskite solar cells. By modifying the synthesis parameters, the morphological features of the interconnected TiO2 nanostructures can be widely tuned and precisely controlled. The functional properties of the anodized TiO2 network are found to be severely influenced by morphology as well as the extent of oxidation. The device with the optimized TiO2 network exhibits superior electron extraction and transferability, resulting in conspicuous enhancement of the photocurrent and power conversion efficiency (PCE). This work proposes a promising and facile method for improving the performance of perovskite solar cells.
研究领域:
材料科学
·
能源技术
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高影响因子
International Journal of Nanomedicine
·
2023
·
IF 8
Yong Huang,Guiqin Song,Xiaotong Chang,Zhenhui Wang,Xuejiao Zhang,Shuguang Han,Zhuobin Su,Hejie Yang,Dongdong Yang,Xiaojun Zhang
Background Poor mechanical properties, undesirable fast dissolution rate, and lack of antibacterial activity limit the application of hydroxyapatite (HA) as an implant coating material. To overcome these limitations, a hybrid coating of Ag+-substituted fluorhydroxyapatite and titania nanotube (TNT) was prepared.Methods The incorporation of silver into the HA-TiO2 hybrid coating improves its antimicrobial properties. The addition of F as a second binary element increases the structural stability of the coating. The TNT/F-and-Ag-substituted HA (FAgHA) bilayer coating on the Ti substrate was confirmed by X-ray diffraction, scanning electron microscope, energy-dispersive X-ray spectroscopy (EDS), and X-ray photoelectron spectroscopy (XPS).Results The results indicate that the FAgHA/TNT nanocomposite coating has a dense and uniform morphology with a nano-rod-like structure. The solubility measurement result shows that the substitution of F− ions into the AgHA structure has a positive effect on the dissolution resistance of HA. The adhesion strength of FAgHA/TNT has significantly increased because of the interlocking of the roughened surface with nano-rod-like particles that entered into the voids of the TiO2 nanotubes. Compared with that of the bare Ti, the corrosion current density of FAgHA/TNT-coated Ti substrate decreased from 3.71 to 0.18 μA, and its corrosion resistance increased by almost two orders of magnitude. Moreover, despite pure HA, the FAgHA killed all viable Staphylococcus aureus after 24 hours of incubation. Although the fabricated FAgHA/TNT coating is hydrophobic, it induced deposition of the typical spherical apatite when immersed in a simulated body fluid (SBF); the osteoblasts spread very well on the surface of the coating. In addition, in vitro cell culture tests demonstrated cell viability and alkaline phosphatase (ALP) similar to pure HA, which indicated good cytocompatibility. Interestingly, compared with bare Ti, FAgHA/TNT-coated Ti surface was innocent for cell vitality and even more beneficial for cell osteogenesis in vitro.Conclusion Enhancing the osseointegration and preventing infection in implants, the FAgHA/TNT-coated Ti makes implants more successful.
研究领域:
生物材料
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生物医学工程
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材料科学
·
表面工程
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DOI
PubMed
高影响因子
Surfaces and Interfaces
·
2026
·
IF 6
Lihuan Feng,Yulin Wang,Hao He,Chunyu Li,Peng Chen,Qiang Liu,Xing’an Dong,Wenjie He,Jiazhen Liao,Wendong Zhang
Solar-driven photocatalytic CO 2 reduction provides a sustainable pathway for carbon-neutral fuel production, yet its efficiency is fundamentally limited by the chemical inertness of linear CO 2 and inefficient utilization of photogenerated charge carriers. Effective activation of CO 2 requires electron injection into its antibonding π* orbitals, a process that is poorly matched with conventional oxide photocatalysts. Herein, we construct chemically defined Ti-O-Fe interfacial bonds in TiO 2 /Fe 2 O 3 heterojunctions to establish a directional d→π* electron-transfer channel for CO 2 activation. The optimized TiO 2 /Fe 2 O 3 photocatalyst, synthesized via a one-step hydrothermal method, exhibits broadened visible-light absorption and delivers a CO formation rate of 17.56 μmol·g −1 ·h −1 , over three times higher than that of pristine TiO 2 . Spectroscopic analyses and density functional theory calculations reveal that interfacial electron transfer shifts Fe 3d states toward the Fermi level, enabling strong hybridization with the CO 2 π* orbitals and significantly lowering the free-energy barrier for *COOH formation. This bond-mediated electronic coupling not only suppresses charge recombination but also directs photogenerated electrons toward the CO 2 activation pathway. These results demonstrate that interfacial d-band engineering through chemically specific oxide–oxide bonds provide a powerful strategy to program elementary reaction steps in solar-driven CO 2 reduction beyond conventional band-alignment design.
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高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2021
·Vol. 35
·期 10
·e6342
·
IF 4.105
Yue Dai,Tangtong Ju,Hailong Tang,Meiling Wang,Min Wang,Yongqing Ma,Ganhong Zheng
A novel composite of N-doped TiO 2 -quantum dots tightly anchored on graphene (denoted as N-doped TiO 2 -QDs@GP) with superior interfacial contact via C–Ti bond was synthesized via the simple one-pot vapor-thermal method. The as-obtained N-doped TiO 2 -QDs@GP includes TiO 2 QDs with an average size of 3.28 nm uniformly distributed on the surface of GP. The large specific area and superior interfacial contact via C–Ti bond ensured its potential photocatalytic application. Except for the effective interfacial charge transfer achieved via C–Ti chemical bond between TiO 2 QDs and GP, its enhanced visible light absorption and larger oxygen vacancy ratio also make contributions. Electron spin resonance spectra (ESR) were used to study the photocatalytic mechanism, which proved the participation of both superoxide radical (·O 2 − ) and hydroxyl radical (·OH) in the photocatalytic reactions. This work provides a promising one-pot method for constructing intimately contacted N-doped TiO 2 /GP composite with superior interfacial contact via C–Ti bond and excellent photocatalytic activities.
研究领域:
材料科学
·
纳米技术
·
光催化
·
复合材料
·
环境化学
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Kai Lv,Yong Zhu,Lei Wang,Zhang Chen,Zongtao Zhang,Yanfeng Gao
To reduce carcinogenic cobalt content in pigments, a series of near-infrared reflective pigments based on CaAl 12-x-y Co x Ti y O 19 (x = 0–0.5 and y = 0-(x+0.3)) were prepared via solid state reactions. Although the cobalt content in the pigment CaAl 11.7 Co 0.1 Ti 0.2 O 19 is only 0.87% by mass, the resulting pigment still has excellent color properties (64.89, 3.88, −40.30) and near-infrared reflectance (∼70%). The structural information of the obtained pigments were analyzed by XRD refinement, and the results revealed that the doping concentration of titanium relative to cobalt significantly affected the coordination structure of cobalt in hibonite, which in turn apparently influenced the optical properties of the obtained samples. The actual cooling effect of the CaAl 11.7 Co 0.1 Ti 0.2 O 19 coating was tested using a model house and the annual energy consumption was simulated by using EnergyPlus software. For a warm city (Haikou), using this CaAl 11.7 Co 0.1 Ti 0.2 O 19 coating can reduce energy consumption for cooling by 24.75%.
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高影响因子
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