Journal of Materials Chemistry C
·
2021
·Vol. 9
·期 25
·7976-7981
·
IF 7.393
Xiankai Fu,Wanqi Chen,Xiaowen Hao,Zhimin Zhang,Ruolan Tang,Bo Yang,Xiang Zhao,Liang Zuo
This paper reports a new candidate material λ-Ti3O5 for microwave absorption. λ-Ti3O5 has been proposed to be metastable and has emerged at room temperature only in the form of nanocrystals. To prepare high purity λ-Ti3O5, the formation energies of 27 different elements doped into λ-Ti3O5 were calculated by first-principles from the energy point of view. It was found that Li has the strongest stabilizing effect on λ-Ti3O5. The prepared λ-Ti3O5 and Li/λ-Ti3O5 show good microwave absorption properties: the efficient absorption bandwidth of λ-Ti3O5 can reach 7.9 GHz at 1.7 mm thickness, and the efficient absorption bandwidth of Li/λ-Ti3O5 can reach 7.4 GHz at 1.2 mm thickness. In addition, we propose a strategy of using the number of states of the micro-electric field to predict the microwave absorption properties of materials, which is helpful to the understanding of the origin and development of microwave absorption.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
NATURE
·
2023
·Vol. 622
·期 7983
·499-506
·
IF 64.8
Yang Bo,Zhang Zhiming,Liu Peitao,Fu Xiankai,Wang Jiantao,Cao Yu,Tang Ruolan,Du Xiran,Chen Wanqi,Li Song,Yan Haile,Li Zongbin,Zhao Xiang,Qin Gaowu,Chen Xing-Qiu,Zuo Liang
Solar steam interfacial evaporation represents a promising strategy for seawater desalination and wastewater purification owing to its environmentally friendly character 1 , 2 , 3 . To improve the solar-to-steam generation, most previous efforts have focused on effectively harvesting solar energy over the full solar spectrum 4 , 5 , 6 , 7 . However, the importance of tuning joint densities of states in enhancing solar absorption of photothermal materials is less emphasized. Here we propose a route to greatly elevate joint densities of states by introducing a flat-band electronic structure. Our study reveals that metallic λ-Ti 3 O 5 powders show a high solar absorptivity of 96.4% due to Ti–Ti dimer-induced flat bands around the Fermi level. By incorporating them into three-dimensional porous hydrogel-based evaporators with a conical cavity, an unprecedentedly high evaporation rate of roughly 6.09 kilograms per square metre per hour is achieved for 3.5 weight percent saline water under 1 sun of irradiation without salt precipitation. Fundamentally, the Ti–Ti dimers and U-shaped groove structure exposed on the λ-Ti 3 O 5 surface facilitate the dissociation of adsorbed water molecules and benefit the interfacial water evaporation in the form of small clusters. The present work highlights the crucial roles of Ti–Ti dimer-induced flat bands in enchaining solar absorption and peculiar U-shaped grooves in promoting water dissociation, offering insights into access to cost-effective solar-to-steam generation.
研究领域:
材料科学
·
环境科学
·
能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2024
·
IF 8.3
Sijia Sun,Shuai Zhang,Mingzhu Pan
Intelligent fire warning system is a crucial protective equipment reduce fire hazards . A recent increasing concern is the development of sensitive fire warning materials that can be integrated with combustible materials to provide real-time alarms in the fire. However, current research on improving the sensitivity of fire warning sensors based on temperature-resistance response focuses on constructing continuous conductive networks. The effect of the heat transfer process is ignored, which limits the further improvement of alarm sensitivity. Here, we developed a strategy to improve thermal conductivity . Based on the chitosan (CS) conductive network in Ti 3 O 5 -based fire sensing system, aminated 2D h-BN nanosheets with high temperature resistance and ultrahigh in-plane thermal conductivity were further introduced. The h-BN improves the thermal conductivity of the fire warning coating from 1.43 W/m·K to 2.29 W/m·K. Intelligent fire warning sensors with ultra-sensitivity (1.16 s), low response temperature (170 °C), duration time (12 min) and durability (100 cycles) were successfully prepared by improving thermal conductivity to rapidly transfer heat to Ti 3 O 5 , which leads to a rapid decrease in resistance as the core mechanism. This work proposed an ingenious strategy for the construction of high fire safety and thermal conduction fireproof coatings, which revealed enticing prospects in the field of intelligent coatings.
研究领域:
材料科学
·
传感技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2025
·
IF 5.1
Tingting Yuan,Yudong Wang,Na Jin,Jinwen Ye
Solar steam generation has attracted wide interest in desalination and sewage purification due to its cost-effectiveness and environmental friendliness. However, the low evaporation rate and energy utilization efficiency limit the further application of the evaporation system. In order to solve the above problems, a lot of efforts have been made in the development of new materials. With excellent semiconductor properties and photothermal performance, titanium suboxides (TinO2n−1) are considered as promising materials used as the photothermal conversion materials (PTCMs). However, less emphasis is placed on how crucial it is to adjust the grain size of TinO2n−1 in order to design the bandgap and improve evaporation performance. Therefore, in this work, we report a pathway to modulate the grain size and morphology to prepare nanolamellar λ-Ti3O5 (NL-T3). The tuned λ-Ti3O5 has a narrower bandgap and can thus generate more electron–hole pairs under solar irradiation, with up to 92.2% solar absorptivity and 91.7% photothermal conversion efficiency. And the lamellar morphology has a remarkably high specific surface area of 131.3 m2 g−1, which makes NL-T3 have superior hydrophilicity. Its application in a structurally optimized 3D evaporation system achieved an evaporation rate of 6.41 kg m−2 h−1 and superior cycling performance under long-term use. This study emphasizes the importance of modulation of morphology for semiconductor PTCMs and provides a theoretical basis for their subsequent efficient application in the solar field.
研究领域:
材料科学
·
能源工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Anni Fu,Ziyang Qiu,Qiuxun Liu,Ye Chen,Yuxuan Hu,Ximei Liu
Solar-driven interfacial evaporation holds great promise for clean water production, particularly in seawater desalination and wastewater purification. However, the limited evaporation performance of evaporators and their incapability to degrade organic contaminants hinder their practical applications. Here, we develop a bifunctional frustum-array solar-driven evaporator with high efficiency in both seawater desalination and photocatalytic dye degradation. Our evaporator, designated as FATPE, is fabricated via a template-assisting method with Ti 3 O 5 /PVA/PAM hydrogels to create a frustum-array structure. Under 1 sun irradiance (1 kW m -2 ), FATPE achieves an exceptional evaporation rate of 4.34 kg m -2 h -1 , energy efficiency of 95.90%FATPE, as well as excellent desalination capability with a salt rejection rate exceeding 99.90% in simulated seawater with varying salinities. Furthermore, FATPE can realize efficient photocatalytic degradation of varying organic pollutants, exemplified with a methylene blue (MB) degradation rate of 85.37%. This work realizes the dual functional synergy of high-efficiency water purification and photocatalytic dye degradation, offering a promising strategy for producing clean water from seawater and dye-contaminated wastewater in coastal regions.
研究领域:
环境科学技术
·
材料科学
·
太阳能利用
·
水净化
·
光催化
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Shuai Zhang,Yin Zhang,Yanping Huang,Bingqun Lin,Shengjie Ling,Changtong Mei,Mingzhu Pan
With the acceleration of urbanization, energy-efficient, comfortable, and lightweight materials have been growing widely used. An ideal real-time monitoring strategy integrated with prominent fire sensing capability, flame retardancy, and embedded in communication network Internet of Things (IoT) remains a huge concern. Here, we develop a sensitive and durable fire alarm intelligent coating strategy based on a metal-insulator transitional Ti 3 O 5 via a layer-by-layer assembly (LBL). We elucidate the atomic structure, electronic band, and orbital structure of Ti 3 O 5 correlated from the charge-ordered β-phase (electrical insulation state) to valence-delocalized of α-phase (electrical conduction state) during switchable temperature by density functional theory (DFT) calculations. Accordingly, a thermally activated electron jump among the localized states facilitates the early fire alarm with a sensitive fire response time (∼3.78 s) and an excellent response repeatability. Moreover, the fire alarm coating also performs the remarkable flame retardancy, smoke suppression and weatherability. This work provides a promising routine to realize the condensed matter as advanced fire sensors, offering insights into fire alarm towards smart phones, cloud service, and a central control system through IoT for fire prevention and protection application.
研究领域:
材料科学
·
消防工程
·
电子与通信技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2026
·
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.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Magnesium and Alloys
·
2025
·
IF 13.8
Zexuan Yang,Zhendong Ma,Yongjin Zou,Cuili Xiang,Lixian Sun,Yongpeng Xia,Yong Shen Chua
Magnesium hydride serves as a promising solid-state hydrogen storage material owing to its high potential. However, its practical applications are constrained by the high enthalpy of hydrogen absorption and slow kinetics. In this study, we prepared a Ni/Ti 3 O 5 @graphene oxide (GO) dual-heterojunction composite material via solvent heating, electrostatic adsorption, and calcination to improve the hydrogen storage capabilities of MgH 2 . Adding Ni/Ti 3 O 5 @GO to MgH 2 lowered the initial dehydrogenation temperature of MgH 2 to 183 °C; at a dehydrogenation temperature of 275 °C, 6.4 wt.% of H 2 escaped from the MgH 2 bulk. In addition, the hydrogen storage material absorbed 1.8 wt.% H 2 at 30 °C for 30 min. The calculated activation energy of dehydrogenation was 48.221 ± 0.141 kJ·mol −1 , which was significantly lower than that of the ball-milled MgH 2 (112.63 ± 1.44 kJ·mol −1 ). Mechanistic analysis results revealed that the heterojunction constructed from the multiphase compound system provided a large number of active sites and hydrogen diffusion routes, resulting in a synergistic catalytic effect that enhanced the hydrogen storage capacity of MgH 2 . In this work, we clarified the compositions of fuzzy interfaces in heterostructured materials by conducting ultraviolet photoelectron spectroscopy tests and identified key composite materials for the formation of heterojunctions.
研究领域:
材料科学
·
储能
·
纳米技术
·
氢能
·
固态化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2026
·
IF 7.6
Qiang Yuanyuan,Wang Xuechuan,Zhou Yi,Yang Lei,Mao Haojie,He Bin,Zhu Xing
The promotion of cellulosic ethanol is highly significant for enhancing energy security, mitigating environmental challenges, and advancing sustainable development, with simultaneous saccharification and fermentation (SSF) being the most widely used method for its commercialization. However, the disparity between the optimal operating temperatures of yeast cells (∼35 ° C) and cellulase (∼48 ° C) poses a major constraint on the efficiency of SSF processes. To address this challenge, this study presents a strategy for constructing SSF systems based on photocontrolled localized thermal effects. Heterostructured Ti 3 O 5 nanospheres were surface-coated with polydopamine (PDA) to enhance photothermal performance, followed by grafting azobenzene-containing polymer brushes as a thermal energy reservoir to immobilize cellulase. By precisely modulating the microenvironmental temperature around the enzymes, this approach enables both cellulase and yeasts to operate near their respective optimal temperatures in the SSF reactor. Experimental results demonstrate that the ethanol yield achieved using the developed system is 23% higher than that obtained under conventional compromise temperature conditions. This method offers a promising and practical pathway to improve the production efficiency of cellulosic ethanol, with considerable potential for industrial application.
✓ 已验证
DOI
高影响因子
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
·
2025
·
IF 7
Chang-Chen Ji,Zhi-Bo Li,Yun-Tao Xi,Zhao-Wen Ren,Ming-Yang Li,Guo-Dong Sun
The grain boundary control is requisite in the development of high-performance molybdenum (Mo) composites in the field of high-temperature applications. Meanwhile, strengthening these Mo-based materials without sacrificing their plasticity has been a huge challenge. In this study, we introduced TiC nanoparticles into the Mo alloy system to break the development bottleneck of the mechanical alloying (MA) approach: a large amount of oxygen impurities and large-size second-phase particles at grain boundaries (GBs). Unlike traditional oxides, TiC could undergo a purification effect to absorb a large number of oxygen impurities to generate in-situ and dispersed Ti 3 O 5 nanoparticles during the high-temperature SPS process. First-principles calculations also elucidated that these semi-coherent Ti 3 O 5 nanoparticles could enhance the interface bonding strength of the Mo GBs on account of the stronger Mo-Ti-O bonds. As a result, the average grain size of Mo-Ti 3 O 5 composite fabricated via spark plasma sintering (SPS) technology at 1200 °C is only 1.3 μm owing to the uniform dispersion of nanoscale second-phase particles. Meanwhile, our prepared ultrafine-grained Mo-Ti 3 O 5 composites possess outstanding mechanical properties, where the compressive yield strength, total strain-to-failure, and hardness of the Mo-Ti 3 O 5 composite are 1340 MPa, greater than 50 %, and 362.8 HV 0.5 , respectively. Our strategy using core-shell composite powder as a raw material provides a novel perspective for the preparation of high-performance refractory metals and has potential to be applied to relevant engineering applications.
研究领域:
材料科学
·
纳米技术
✓ 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）