JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2026
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IF 14.3
Wanqi Chen,Ruolan Tang,Bo Yang,Wenzhao Sun,Bo Zhang,Peize Lv,Banghe Lv,Haile Yan,Zongbin Li,Song Li,Liang Zuo
The Magnéli-phase λ-Ti 3 O 5 , characterized by its unique flat-band electronic structure, is a promising photothermal conversion material for solar-driven interfacial evaporation. However, its intrinsic thermodynamic instability at ambient temperature severely constrains large-scale practical application. To overcome this challenge, we developed a scalable synthesis strategy for stabilizing λ-Ti 3 O 5 via arc-melting followed by high-energy ball milling, coupled with Lithium (Li) doping. Structural and surface analyses confirm that Li incorporation effectively stabilizes the λ-phase. Morphological studies reveal particle refinement (∼1–2 μm) with increased surface roughness and oxygen vacancies, further enhancing solar absorption with overall reflectivity < 6% in the range of 250–2500 nm. Incorporating 10 wt.% of Li 0.25 Ti 2.75 O 5 particles into a Polyvinyl alcohol/Polyvinylpyrrolidone (PVA/PVP) porous hydrogel evaporator yielded an evaporation rate of 5.22 kg m −2 h −1 under one sun irradiation. Remarkably, the evaporator demonstrated excellent resistance to salt crystallization, maintaining stable performance during a 24-h continuous operation in 3.5 wt.% saline water. This work not only provides a practical and scalable approach for stabilizing λ-Ti 3 O 5 but also offers valuable insights into the development of efficient, durable photothermal materials for solar desalination technologies.
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高影响因子
Materials Today Physics
·
2026
·
IF 9.3
Lijun Zhai,Feng Luo,Lingfang Liu,Xinyue Zhang,Jian Shi,Jian Wang,Yanli Li,Hongxia Liu,Wenjie Xie,Zhigang Sun
The 18-electron Ti 0.75 NiSb compound exhibits intrinsically low lattice thermal conductivity due to the presence of numerous Ti vacancies. However, the high carrier concentration limits further improvement of the thermoelectric performance. In this work, Co atoms are employed to substitute Ni atoms in Ti 0.75 Ni 1- x Co x Sb. The results show that Co substitution effectively tunes the valence electron count of Ti 0.75 NiSb and leads to the formation of a NiSb-based metallic impurity phase, which significantly reduces the carrier concentration from 8.04 × 10 21 cm −3 to 2.31 × 10 21 cm −3 . Consequently, the Seebeck coefficient increases significantly from −94 μV/K for the x = 0 sample to −189 μV/K for x = 0.5, while the electronic thermal conductivity drops substantially from 3.52 to 0.87 W/mK at 873 K. Meanwhile, the lattice thermal conductivity increases due to the reduced Ti vacancy concentration (to satisfy the 18-valence-electron rule) and the formation of the metallic impurity phases. Ultimately, a peak zT of ∼0.50 is achieved at 873 K, representing a ∼47% enhancement compared with the Ti 0.75 NiSb alloy. This work demonstrates that the combination of valence electron count modulation and interface engineering is an effective strategy to optimize the thermoelectric performance of half-Heusler systems. Download: Download high-res image (378KB) Download: Download full-size image
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CERAMICS INTERNATIONAL
·
2026
·
IF 6
Wei Feng,Jian Zhang,Yong Xiao,Peng Cao,Guoqiang Luo,Qiang Shen
Active metal brazing of Si 3 N 4 /Cu joints typically forms a rigid TiN/Ti 5 Si 3 interface that suffers from significant thermal mismatch. This study demonstrates an alternative strategy for engineering the interfacial reaction pathway using a (Cu20Sn) 100-x Ti x filler. A distinct Cu 2 Ti 4 O interfacial layer formed through oxygen participation in the interfacial reaction during brazing. Thermodynamic analysis reveals that the Ti-O reactions possess a significantly greater driving force than conventional Ti-N and Ti-Si reactions. The resulting Cu 2 Ti 4 O phase establishes a beneficial coefficient of thermal expansion (CTE) gradient across the joint, thereby effectively mitigating interfacial thermal stress. Joint brazed with 5 wt% Ti achieved the highest shear strength of 137.3 MPa, which is attributed to the optimized morphology of a discontinuous Cu 2 Ti 4 O layer and the reduced brittle CuSn 3 Ti 5 precipitation. These results demonstrate a new approach for interfacial engineering of non-oxide ceramic joints, confirming that trace oxygen can act as an effective microstructural modifier.
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MICROCHEMICAL JOURNAL
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2022
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IF 5.304
Mansoor Khan,Mustafa Soylak
Palladium is an important metal as it has a wide range of applications in different fields but can cause cancer in human beings. Therefore, precise quantification of palladium is important. For this purpose, new material Ti 3 AlC 2 max phase having unique properties like high stability, thermal conductivity and environmental friendly has been synthesized. To increase its surface area of Ti 3 AlC 2 max phase, graphene oxide (GO) has been incorporated to form Ti 3 AlC 2 max phase GO nanocomposite. Ti 3 AlC 2 max phase GO nanocomposite was used as solid phase extracting material for microextraction and preconcentration of Pd(II) in environmental samples and medical appliances. Characterization of the adsorbent was achieved by using fourier transform infrared spectroscopy (FT-IR), scanning electron microscope (SEM), X-ray diffraction (XRD), energy dispersive X-ray (EDX) and surface area analyzer (SAA). All the parameters that influence the extraction efficiency of the adsorbent like solution pH, amount of adsorbent, volume of sample, vortex time, desorption condition and interferences effect were determined and optimized. The limit of detection (0.327 µg/L) and limit of quantification (1.09 µg/L) show that the method is highly sensitive. The relative standard deviation was calculated as 5.48 % for five repeated measurements, which shows that the developed method is reproducible. The method is highly efficient with large values of preconcentration factor (20) and enhancement factors (20). The method was validated by applying the method to real water samples, soil samples and medical appliances with satisfied recovery results (94–106 %).
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Journal of Materials Research and Technology-JMR&T
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2022
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IF 6.267
Zeyun Cai,Xi Cheng,Jiayin Chen,Tao Xiang,Guoqiang Xie
Oxygen solid solution-strengthened titanium-oxygen (Ti–O) alloys with ultrahigh yield strength and large ductility were designed and synthesized via high-energy ball milling (BM) combined with spark plasma sintering (SPS) in compression. The morphology, dispersion state, and solid solution microstructure of the Ti–O alloys were optimized by regulating the mixing method, sintering temperature, and added oxygen content. Outstanding properties that include a compressive yield strength of 1220 MPa and large ductility of 36.3% were achieved after 1 h high-energy BM and 1000 °C SPS with the addition of about 1.8 at% oxygen. The grain refinement and oxygen solid solution strengthening indicate that the dense morphology, refined grain size, and oxygen solid solute atoms are responsible for the balance between the superior strength and ductility of the titanium alloys.
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CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Peilong Zhou,Dongxu Yao,Hanqin Liang,Yongfeng Xia,Yu-Ping Zeng
Lithium–Sulfur battery is deemed as one of the most promising next-generation energy storage systems. Identifying the reduction of soluble lithium polysulfides (LiPSs) is critical for rational material designs for Lithium–Sulfur batteries. In this work, a simple molten-salt method is applied to synthesize titanium nitride/silicon nitride (TiN–Si 3 N 4 ) core-shell nanoparticles to inhibit soluble polysulfides shuttling. This Ti-reacted strategy has outstanding advantages such as facile and recyclable preparation process, tunable TiN morphology, and good polysulfide adsorption. With the modified separator, Li–S cells exhibit an outstanding initial capacity of 1243 mA h g −1 at 0.5C, good rate capacity of 782 mA h g −1 at 2C, and high capacity retention of 49.2% after 500 cycles. This low-cost and eco-friendly Ti-reacted strategy provides a practical route for the actual application of separator modification in the field of lithium-sulfur battery.
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CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Xuesong Li,Xiaofei Ma,Huankai Zhang,Ni Xue,Qian Yao,Tao He,Yi Qu,Jian Zhang,Xutang Tao
MXenes, as attractive two-dimensional materials, have shown extraordinary potential for applications, however, their instability severely limits further research and applications on a large-scale and industrial level. Here, we overcome the environmental instability of MXene-Ti 3 C 2 T x by an optimized synthetic route, including the synthesis of high-quality MAX phase (Ti 3 AlC 2 ) and the post-treatment of Ti 3 C 2 T x . The optimized Ti 3 C 2 T x (O-Ti 3 C 2 T x ) achieves a dramatic improvement in stability. Even at low concentrations (∼0.1 mg/mL), the dark green aqueous dispersion of monolayer O-Ti 3 C 2 T x showed no oxidation and degradation when aged under ambient conditions for two months, while conventional Ti 3 C 2 T x required only ∼ 10 days for complete oxidative degradation under the same conditions. More importantly, compared with the conventional Ti 3 C 2 T x , O-Ti 3 C 2 T x exhibits higher conductivity, better nonlinear optical properties , excellent thermal stability, and comparable biocompatibility. In the application of pulsed laser with MXene as a saturable absorber, the conventional Ti 3 C 2 T x leads to severe degradation of Q-switching performance due to its instability, while O-Ti 3 C 2 T x shows excellent Q-switching performance in long-term operation. This work achieves a substantial solution to the instability problem of MXene-Ti 3 C 2 T x without compromising its excellent performance, paving the way for the development of its practical applications.
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CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Hao Ai,Siyu Jian,Yuan Yao,Kaifeng Du
Designing and tuning macropores into aligned structure is of considerable importance in promoting mass transfer, improving chromatographic performance and enhancing column efficiency. Herein, we have synthesized an innovative aligned porous Chitosan/Ti 3 C 2 MXenes monolith via a facile, versatile and reproducible unidirectional “freeze-casting” method. Typically, the accumulation of Ti 3 C 2 MXenes directs the formation of aligned structure during the unidirectional freezing process and thus aligned macropores are formed by a subsequent freeze-drying process. By various physical characterization, the distribution of aligned macropores, micropores and specific surface area are determined to be 21 μm, 2.53 nm and 103.09 m 2 ·g −1 , respectively. In addition, monolith bed permeability is calculated to be 1.94 × 10 -12 m 2 , approximately 10 times than conventional monolith. Batch adsorptive experiments confirm that adsorptive capacities to bovine serum albumin and bovine hemoglobin are remarkably elevated on account of the high affinity of proteins onto those imbedding Ti 3 C 2 MXenes. Meanwhile, continuous mass transfer equation describes the aligned macropores facilitate the film mass transfer factor ([ k L a ] f ) in a separation process thus driving the global mass transfer factor ([ k L a ] g ). It is expected that the aligned porous Chitosan/Ti 3 C 2 MXenes monolith promises great potential for a continuous separation of proteins when a wholesale production is required.
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ACS Applied Nano Materials
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2022
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IF 6.14
Bao Shi,Lu Chen,Tien-Chien Jen,Xinying Liu,La Li,Aibing Chen,Guozhen Shen
Freestanding and flexible MXene electrodes have exhibited great potential in wearable energy device design through over 10 years of rapid development but are yet limited by the restacking of nanosheets and the complex and lengthy ion transport paths that reduce their performance at high charge–discharge rates. Herein, we provide a molten salt method assisted by a selective etching process for the directional vertical growth of Ti2CTx MXene nanosheets on carbon fiber (CF) substrates, showing several advantages: (1) bifunctional CF, which acts as both a self-supported freestanding flexible substrate and carbon source during the synthesis of the Ti2AlC MAX phase, (2) eliminating the need for collecting the powder Ti2CTx MXene from the acid mixture after the selective etching process and filtration steps to obtain freestanding and flexible MXene films, and (3) the directional vertical arrangement of Ti2CTx shortens the ion diffusion path and the integrated structure of nanosheets and carbon fibers speeds up ion transport. As a result, the fabricated Ti2CTx MXene@CF//Zn@Cu@CF hybrid Zn-ion supercapacitor delivers a high areal capacitance of 380 mF/cm2, an energy density of 52.77 μWh/cm2 at 5 mV/s, excellent stability with 90.06% capacity retention after 10 000 cycles, and 89.76% capacity retention after storing in air for 30 days. The directional vertical Ti2CTx MXene nanosheets can be extended to other application areas, such as sensors, catalysts, detectors, electromagnetic shielding, etc.
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Small
·
2022
·Vol. 18
·期 51
·2204611
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IF 15.153
Yi Rao,Yutong Wu,Xueya Dai,Ya-Wen Zhang,Gaowu Qin,Wei Qi,Song Li
Single-atom catalysts (SACs) exhibit distinct catalytic behavior compared with nano-catalysts because of their unique atomic coordination environment without the direct bonding between identical metal centers. How these single atom sites interact with each other and influence the catalytic performance remains unveiled as designing densely populated but stable SACs is still an enormous challenge to date. Here, a fabrication strategy for embedding high areal density single-atom Pt sites via a defect engineering approach is demonstrated. Similar to the synergistic mechanism in binuclear homogeneous catalysts, from both experimental and theoretical results, it is proved that electrons would redistribute between the two oxo-bridged paired Pt sites after hydrogen adsorption on one site, which enables the other Pt site to have high CO oxidation activity at mild-temperature. The dynamic electronic interaction between neighboring Pt sites is found to be distance dependent. These new SACs with abundant Pt-O-Pt paired structures can improve the efficiency of CO chemical purification.
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Fei Long,Qixiang Zhang,Junjie Shi,Li Wen,Yonghui Wu,Ziqi Ren,Zunyu Liu,Yixin Hou,Ke Mao,Ke Niu,Nishuang Liu,Zhi Zhang,Luying Li,Jun Su,Fei Long,Yihua Gao
Aqueous zinc-ion batteries (AZIBs) are a green, low-cost and high-safety energy storage technology. Although MoS 2 is a promising electrode material, low conductivity and poor stability still limit their application in AZIBs. Constructing conductive heterostructures is an effective strategy to overcome these problems. Herein, metallic 1 T-MoS 2 nanosheets are innovatively combined with conductive Ti 3 C 2 MXene, resulting in enlarged 1 T-MoS 2 interlayers (from 9.5 to 9.9 Å) and enhanced hydrophilicity. This novel 1 T-MoS 2 /Ti 3 C 2 MXene heterostructure exhibits exceptional high-rate capability (284.3 mAh/g at 0.10 A/g with 105.2 mAh/g at 10.00 A/g) and long-term cycling stability (93.2 % capacity retention after 3000 cycles). High capacity comes from the expanded ion storage space caused by the extended layer spacing of the metallic 1 T-MoS 2 . Outstanding rate capability thanks to ultrafast electrons and ions transport from Ti 3 C 2 MXene. Prominent long-term cycling stability is attributed to the efficient synergistic effect of 1 T-MoS 2 and Ti 3 C 2 MXene in the 3D interconnected networks. As a proof of concept, the wearable quasi-solid-state Zn-ion battery employing the 1 T-MoS 2 /Ti 3 C 2 MXene cathode exhibits stable electrochemical performance under different bending conditions. This work explores a new route to design high-performance layered cathode materials for AZIBs.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2022
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IF 6.371
Jiaxi Sui,Dongdong Liu,Chunyu Wang,Lijuan Wang,Bo Zhong,Yuanyuan Ma
Non-metallic Surface-Enhanced Raman Scattering (SERS) substrate materials with unique structures are considered as promising candidates for detection of dyes in the environment. In this work, a sea urchin-like K 2 Ti 8 O 17 (KTO) nanomaterial was prepared by a facile and efficient hydrothermal method . The enhancement factors of the sea urchin-like KTO for crystal violet and methylene blue are 3.8 × 10 5 and 2.45 × 10 5 respectively, and the minimum detection limits of both can reach 10 −8 M, which means the sea urchin-like KTO a promising non-metallic SERS substrate for detecting dyes in the environment. The excellent SERS performance of the sea urchin KTO was attributed to the excellent charge transfer and probe adsorption capability of KTO by energy band and zeta potential analysis. Finally, the excellent application potential of the sea urchin KTO was verified by simulating a practical use scenario.
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