JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Huying Yan,Yang Guo,Xingzhi Bai,Jiawei Qi,Haipeng Lu
Optimizing and enhancing the performance of electromagnetic wave (EMW) absorption materials relies on the modification of their composition and structure through heterogeneous interface engineering. Ti 3 C 2 T x ’s high conductivity results in an impedance mismatch, which hinders efficient EMW absorption. Herein, a one–step catalytic chemical vapor deposition (CCVD) method is used to construct the Ti 3 C 2 T x /TiO 2 @C heterogeneous structure. Upon annealing at 500 °C, amorphous carbon is uniformly deposited on the Ti 3 C 2 T x surface, thereby incorporating the scale–like TiO 2 generated during the process. The inclusion of the amorphous carbon layer and TiO 2 reduces the substrate’s conductivity, achieving optimized impedance matching. Additionally, building heterogeneous interfaces between Ti 3 C 2 T x , TiO 2 , and C enriches multiple loss mechanisms involving dipole and interfacial polarization, ultimately enabling optimal EMW absorption performance. The minimum reflection loss ( RL min ) value of Ti 3 C 2 T x /TiO 2 @C–500 is –53.12 dB when its thickness and frequency are 1.15 mm and 13.80 GHz, respectively. Moreover, thermal infrared imaging confirms that coatings fabricated using Ti 3 C 2 T x /TiO 2 @C–500 demonstrate a favorable heat dissipation rate, validating its effectiveness in addressing the challenge of efficient heat dissipation in electronic devices. This study significantly contributes to the progress of two–dimensional (2D) materials, enabling high–performance EMW absorption and expanding their applications in complex scenarios.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanoscale
·
2016
·Vol. 8
·期 21
·10928-10937
·
IF 7.76
Hai-Bo Huang,Yue Yang,Li-Hua Chen,Yun Wang,Shao-Zhuan Huang,Jia-Wei Tao,Xiao-Ting Ma,Tawfique Hasan,Yu Li,Yan Xu,Bao-Lian Su
Engineering hierarchical structures of electrode materials is a powerful strategy for optimizing the electrochemical performance of an anode material for lithium-ion batteries (LIBs). Herein, we report the fabrication of hierarchical TiO2/C nanocomposite monoliths by mediated mineralization and carbonization using bacterial cellulose (BC) as a scaffolding template as well as a carbon source. TiO2/C has a robust scaffolding architecture, a mesopore–macropore network and TiO2–C heterostructure. TiO2/C-500, obtained by calcination at 500 °C in nitrogen, contains an anatase TiO2–C heterostructure with a specific surface area of 66.5 m2 g−1. When evaluated as an anode material at 0.5 C, TiO2/C-500 exhibits a high and reversible lithium storage capacity of 188 mA h g−1, an excellent initial capacity of 283 mA h g−1, a long cycle life with a 94% coulombic efficiency preserved after 200 cycles, and a very low charge transfer resistance. The superior electrochemical performance of TiO2/C-500 is attributed to the synergistic effect of high electrical conductivity, anatase TiO2–C heterostructure, mesopore–macropore network and robust scaffolding architecture. The current material strategy affords a general approach for the design of complex inorganic nanocomposites with structural stability, and tunable and interconnected hierarchical porosity that may lead to the next generation of electrochemical supercapacitors with high energy efficiency and superior power density.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials
·
2025
·Vol. 18
·期 7
·1550
·
IF 3.2
Ke Wang,Weifeng Li,Yumei Long
As an environmentally friendly and clean energy technology, solar-driven interfacial evaporation technology has attracted wide attention. However, organic pollutants can easily pollute distilled water during the evaporation of wastewater. In this work, we report a strategy of N-TiO2/C solar absorption with a low bandgap (2.33 eV), excellent light absorption ability, and high photothermal conversion efficiency (48.2%). Black N-TiO2/C was prepared by the sol-gel method in the presence of hexamethylenetetramine as a source of nitrogen and carbon. The simultaneous N doping and C with superior photothermal effect rapidly increased the surface temperature of the material, reduced the recombination rate of electrons and holes, and improved the photocatalytic activity, showing great potential for solar thermal energy conversion. The prepared solar absorbent and polyurethane (PU) were mixed evenly to form a porous N-TiO2/C/PU (NTCP) foam for purifying water. The evaporator produced clean water at a rate of 1.73 kg m−2h−1under the simulated sunlight of 1 sun irradiation. Meanwhile, the evaporator simultaneously photodegraded methylene blue (MB) and rhodamine B (RhB) underwater at a removal rate > 90%. The bifunctional solar water evaporation device combining photocatalytic and photothermal effects holds great potential for water purification.
研究领域:
环境科学
·
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Energy Chemistry
·
2019
·
IF 5.162
Meng Zhang,Xuezhang Xiao,Bosang Luo,Meijia Liu,Man Chen,Lixin Chen
Magnesium hydride has been seen as a potential material for solid state hydrogen storage , but the kinetics and thermodynamics obstacles have hindered its development and application. Three-dimensional flower-like TiO 2 @C and TiO 2 were synthesized as the catalyst for MgH 2 system and great catalytic activities are acquired in the hydrogen sorption properties. Experiments also show that the flower-like TiO 2 @C is superior to flower-like TiO 2 in improving the hydrogen storage properties of MgH 2 . The hydrogen desorption onset and peak temperatures of flower-like TiO 2 doped MgH 2 is reduced to 199.2 °C and 245.4 °C, while the primitive MgH 2 starts to release hydrogen at 294.6 °C and the rapid dehydrogenation temperature is even as high as 362.6 °C. The onset and peak temperatures of flower-like TiO 2 @C doped MgH 2 are further reduced to 180.3 °C and 233.0 °C. The flower-like TiO 2 @C doped MgH 2 composite can release 6.0 wt% hydrogen at 250 °C within 7 min, and 4.86 wt% hydrogen at 225 °C within 60 min, while flower-like TiO 2 doped MgH 2 can release 6.0 wt% hydrogen at 250 °C within 8 min, and 3.89 wt% hydrogen at 225 °C within 60 min. Hydrogen absorption kinetics is also improved dramatically. Moreover, compared with primitive MgH 2 and the flower-like TiO 2 doped MgH 2 , the activation energy of flower-like TiO 2 @C doped MgH 2 is significantly decreased to 67.10 kJ/mol. All the improvement of hydrogen sorption properties can be ascribed to the flower-like structure and the two-phase coexistence of TiO 2 and amorphous carbon . Such phase composition and unique structure are proved to be the critical factor to improve the hydrogen sorption properties of MgH 2 , which can be considered as the new prospect for improving the kinetics of light-metal hydrogen storage materials.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
Catalysis Science & Technology
·
2023
·Vol. 13
·期 20
·5868-5879
·
IF 5
Guixiang Peng,Xueyang Qi,Wenbin Qu,Xiaoli Shao,Lixin Song,Pingfan Du,Jie Xiong
As a new type of pollutant, microplastics, especially microfibers in textiles, pose a great threat to the environment and human health. It remains challenging to remove such emerging organic pollutants. Photocatalytic technology is an effective strategy for H2 fuel production and pollutant reuse using solar energy due to its low cost and environmental friendliness. In this work, the flexible Ni5P4/TiO2/C nanofiber (NF) film photocatalysts were fabricated by electrospinning, hydrothermal treatment and low-temperature phosphating. With the addition of Ni5P4 onto TiO2/C NFs, the light absorption of composite nanofibers was improved, restraining the recombination of carriers simultaneously. Accordingly, the photocatalytic activity of the NFs was improved. The hydrogen evolution of the Ni5P4/TiO2/C NFs for photocatalytic degradation of PET microfibers reached 76.66 μmolH2 gsub−1 in 12 h, which is three times that of TiO2/C NFs. The weight loss rate of PET microfibers reached 6.23% after Ni5P4/TiO2/C NF catalysis, which was nearly 5 times higher than that without a catalyst (1.2%). In addition, the nanofiber film is easy to recycle and avoids secondary pollution. This work provides new ideas for achieving the goal of reducing microplastic fibers and microplastics in an efficient and environmentally friendly way.
研究领域:
环境科学
·
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
Nano-Micro Letters
·
2020
·Vol. 12
·期 1
·1-16
·
IF 12.264
Deng Baiwen,Xiang Zhen,Xiong Juan,Liu Zhicheng,Yu Lunzhou,Lu Wei
Sandwich-like laminated Fe&TiO 2 @C nanocomposites were successfully prepared from the MXene–MOFs hybrids.
A broad effective bandwidth of 6.5 GHz at a thickness of only 1.6 mm was achieved.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Rong Cheng,Xiaozhen Fang,Yulin Wang,Chengzhen Gu,Xinyu Zheng,Mingwei Yang
The electrooxidation of dopamine (DA) and uric acid (UA) suffers from significant signal overlapping due to their similar oxidative potentials. In this study, a composite material consisting of carbon film coating on the surface of anatase TiO 2 (TiO 2 @C) is proposed for the simultaneous detection of DA and UA. The synergistic effect of TiO 2 @C, which includes enhanced charge transfer efficiency and improved conductivity, significantly promotes the electrooxidation process. TiO 2 @C is prepared via a simple calcination approach by annealing MIL-125 at 750 °C under a nitrogen atmosphere. Systematic material characterization, including x-ray diffraction, high-resolution transmission electron microscopy, Raman spectroscopy, etc., is performed to confirm the structural properties and surface composition of TiO 2 @C. TiO 2 @C is then used to modify a glassy carbon electrode (GCE) via drop-coating. A series of electrochemical measurements are conducted for the detection of DA and UA. After optimizing the measurement procedure, simultaneous detection of DA and UA is achieved, with linear ranges of 0.2 to 200 μM for DA and 0.2 to 40 μM for UA, and detection limits of 0.11 μM for DA and 0.09 μM for UA (D = 3σ/k). Further evaluations, including anti-interference testing, stability, and reusability, provide a comprehensive understanding of TiO 2 @C’s performance. Finally, the TiO 2 @C/GCE is applied to determine DA and UA in human urine samples, yielding recoveries between 100.19–101.87 % for DA, and 93.09 %–105.30 % for UA. This study highlights the synergistic effect of TiO 2 @C in electrode modification, demonstrating its potential for the sensitive and selective electrochemical detection of DA and UA.
研究领域:
材料科学
·
分析化学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS LETTERS
·
2013
·
IF 2.224
Zhimin Ren,Chao Chen,Xinxin Fu,Jia Wang,Chenyao Fan,Guodong Qian,Zhiyu Wang
Anatase TiO 2 /C composites nanorods were prepared via a simple internal-reflux approach under atmospheric pressure and subsequent carbonization. The oleic acid, which was used as the surfactant and carbon source, played an important role in synthesis and carbonization process. The TiO 2 /C nanorods prepared have high surface area and mesoporous structure, which are ascribed to the small diameter (2–4 nm) of nanorods and in situ formation of amorphous carbon , and both of those characters can improve the electrochemical property of TiO 2 /C electrode. The nanorods exhibit a high reversible capacity and improved capacity retention. The initial discharge capacity of TiO 2 /C composites is 411 mAhg −1 and still remains about 164.2 mAhg −1 after 50 cycles at a current of 177 mAg −1 , when used as anode materials for lithium ion batteries .
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
Materials Today Sustainability
·
2024
·
IF 7.1
Guilu Qin,Yifan Liu,Ruhumuriza Jonathan,Baoshan Wu,Xian Jian
TiO 2 semiconductor has the disadvantages of energy bandwidth, low photo-quantum efficiency, and electron-hole pair easy recombination, which makes TiO 2 semiconductor photocatalytic materials cannot be widely used efficiently. Here, a simple and low-cost method is used to prepare TiO 2 /C/Cu hybrid by in-situ carbon reduction by chemical vapor deposition. During high-temperature calcination, an amorphous carbon is formed on the surface of anatase TiO 2 , and CuO is reduced by in-situ carbon to obtain Cu. Partial Cu-doping into TiO 2 introduces defects, and in-situ Cu and C loads act as electron traps to reduce photogenerated electron/hole recombination. Compared with the original TiO 2 , the TiO 2 /C/Cu hybrids have a narrow band gap (2.77 eV) and abundant defect active sites and have excellent photocatalytic activity to improve the degradation of formaldehyde (HCHO) and methyl orange (MO) under visible light. In addition, after 4 cycles, the degradation of HCHO and MO still maintained excellent stability. This innovation has many potential applications in the future, including air purification and industry.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Xinle Wang,Jin Chen,Yuzhao Ma,Jianye Shi,Yueying Wang,Xiaofeng Yang,Meidan Que,Yuxi Zhou,Yanjun Li
Two-dimensional (2D) transition metal carbide MXene (Ti 3 C 2 T x ) exhibits great potential in electromagnetic wave (EMW) absorbing materials due to its abundant surface functional groups and defects, tunable conductivity and high specific surface area. The Co@NC/TiO 2 /C composites were successfully synthesized through a solvothermal method and carbonization process using Ti 3 C 2 T x /Co-BTC as precursor. The incorporation of magnetic metal Co nanoparticles and Rutile-TiO 2 effectively addresses the issue of single loss mechanism in Ti 3 C 2 T x . The results show that CTC-100 exhibits excellent EMW absorption performance with a minimum reflection loss (RL) value of −51.3 dB at a thickness of only 1.48 mm, and the corresponding effective absorption bandwidth is (EAB, RL < −10 dB) 4.3 GHz. Simultaneously, by adjusting the matching thickness of the material from 1.29 mm to 5.0 mm, the EAB can achieve 15.42 GHz (from 2.85 GHz to 18 GHz). The excellent EMW absorption performance of CTC-100 composite is primarily attributed to the synergistic effect of magnetic loss and dielectric loss. This study provided an effective strategy for the design of Ti 3 C 2 T x -based EMW absorbing materials with high absorption intensity, reduced thickness, and broad effective absorption bandwidth (EAB).
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
COLLOID AND POLYMER SCIENCE
·
2014
·Vol. 292
·期 12
·3085-3093
·
IF 2.41
Huang Haibin,Chen Qinhui,He Junhui,Zheng Longhui,Chen Baoling,Lin Jinhuo
Janus materials with anisotropic chemical structures and physical properties have attracted increasing attention due to their diversified potential applications. In this paper, titanium dioxide/3-(trimethoxysilyl) propylmethacrylate (TiO 2 /MPS) was obtained by swelling assisted with extrusion of PS@TiO 2 . Then, the phenolic resin (PF) was coated on the surface of MPS lobe. Finally, TiO 2 /C Janus composite particles were obtained by sintering at the atmosphere of nitrogen. The middle objects during reactive process and the final product were systematically characterized. Results showed that the Janus porous particles of TiO 2 /C were snowman-like structure, in which the average diameter of the carbon lobe was 178 nm and that of TiO 2 lobe was 226 nm. When used as photocatalysts for Rhodamine B degradation in aqueous solution under UV irradiation, the resulted Janus product exhibited more efficient photocatalytic activity than TiO 2 hollow microspheres.
Schematic illustration of swelling polymerization approach to synthesize TiO 2 /C Janus composite particles and its photocatalytic activity for the degradation of rhodamine B
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Fei Dou,Yuehua Weng,Guorong Chen,Liyi Shi,Hongjiang Liu,Dengsong Zhang
In this work, novel SiO x anode materials with low volume expansion and high ionic/electrical conductivity are designed by combining internal buffer space and external super thick TiO 2 /C hybrid shell of 200–400 nm. An electrochemical reaction visualizing confocal system is originally developed for characterizing electrode thickness changes, and the real-time quantitative change of electrode thickness during charging and discharging is realized. Surprisingly, the maximum thickness expansion of designed anodes with the specific capacity of 1006.2 mA h g −1 is only 37% in the first lithiation process. Subsequently, the designed anodes present stable cycle life of the capacity attenuation of 7.83% after 100 cycles compared with the capacity of 5 th cycle. It demonstrates that the designed thick TiO 2 /C hybrid coatings effectively swing the expansion stress of micro-sized SiO x to internal space. This work proves that the huge volume expansion of micro-sized SiO x particles can be controlled by reasonable design of surface hybrid coatings and bulk structure, and the long lifespan can be maintained. This strategy paves a way for the development of micro-sized SiO x anode materials with long cycle life and good process ability for high energy density lithium-ion batteries.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）