ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Peng Huang,Xinchun Chen,Wei Qi,Jisen Tian,Jianxun Xu,Kai Wang,Wenli Deng,Chenhui Zhang,Jianbin Luo
Hydrogenated diamond-like carbon (H-DLC) films are limited by their poor thermal stability, which significantly affects the tribological applications and needs improvement. Accordingly, nanodiamond (ND) and hexagonal boron nitride (h-BN) are used to address this issue. When the H-DLC surface is deposited using ND+h-BN mixture with mass ratio of 1:1 and a concentration of 0.1 mg mL −1 and vacuum-heated at 200 °C and 1 × 10 −5 Pa, a superlow friction coefficient of 0.0015 can be obtained, with a reduction of 98.33% as compared to pure H-DLC. Correspondingly, the wear rates of wear scar and wear track decreased by 81.95% and 24.83%, respectively. High vacuum thermal treatment can purify the adsorbed species on the surfaces of ND and h-BN, and produce newly-exposed dangling bonds. Simultaneously, new bonds of C-N are formed between ND and h-BN, and the nanoparticles adhere together to form a polymer-like structure under friction. Furthermore, the ND can support h-BN and reduce its agglomeration. Under the action of tribochemical reaction, the layer spacing of hexagonal boron nitride is increased to obtain a better shear slip. The combination of these factors resulted in ultra-low friction. This study paved the way for developing functional anti-friction additives for durable and high-performance lubrication.
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产品关联
DOI
高影响因子
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
·
2025
·
IF 6.4
Wei Yang,Yichao Lin,Yanqi Zhu,Chenxia Zhen,Weihao Tao,Yanlong Luo,Xiujuan Wang
This study aims to investigate the effect of the modification strategy of hexagonal boron nitride (h-BN) on the interfacial heat transfer behavior of the composite. Dual modification of h-BN, including covalent and non-covalent modifications, was achieved by combining 6-aminohexanoic acid (ACA)-assisted wet ball milling and tannic acid (TA) surface deposition. Molecular dynamics (MD) simulations show that the interfacial thermal resistance of the covalently modified and the non-covalently modified regions of the composite system is reduced by 19.7 % and 40.9 %, respectively, and the interfacial thermal conductivity is increased by 24.5 % and 88.0 %, respectively. Meanwhile, thermogravimetric analysis demonstrated a 9 °C and 23.7 °C increase in the maximum weight loss temperature of the dual-modified composites compared to that of the two single-modified composites. The synergistic mechanism of the dual modification strategy in improving the interfacial interaction and enhancing the phonon vibration power spectrum of the composites is revealed by MD simulations. This study contributes to a deep understanding of the thermal conductivity mechanism of filled thermal interface materials. It guides the design of modified filler-filled high thermal conductivity rubber-based composites.
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DOI
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Haijun Chen,Chunli Kang,Shiyi Zhao,Zhuowen Wang,Haiyang Liu,Deming Dong,Jiao Qu,Na Zheng,Xiuyi Hua
Ineffective separation of photo-carriers and slow photoreaction rates seriously limit the decontamination effectiveness of the photocatalyst. To overcome these limitations, herein, the oxygen vacancies modified Z-scheme Ag 3 PO 4 /FeSnO(OH) 5 heterojunction was designed with FeSnO(OH) 5 as a co-catalyst. In this photosystem, Ag 3 PO 4 and FeSnO(OH) 5 function as oxidation and reduction centers of Ag 3 PO 4 /FeSnO(OH) 5 photocatalysts, respectively. Importantly, oxygen vacancies in the Z-scheme heterojunction provide an effective charge transport pathway, which not only inhibits the photocorrosion of Ag 3 PO 4 but also reduces electron-hole recombination, significantly boosting the photocatalytic decontamination performance and long-term stability of the Ag 3 PO 4 /FeSnO(OH) 5 photocatalyst. Remarkably, the Ag 3 PO 4 /FeSnO(OH) 5 photocatalyst demonstrated outstanding photocatalytic performance, 100 % degrading indomethacin (IDM) under visible light in just 30 min through the main generation of h + that attacks the active atoms of IDM, prominently outperforming other counterparts. Besides, three principal degradation pathways were proposed, and the toxicity of the degradation products was significantly reduced. The Ag 3 PO 4 /FeSnO(OH) 5 exhibited high photocatalytic degradation efficacy across different qualities of water. This research offers an oxygen vacancy modified engineering combined with a Z-scheme heterojunction strategy for constructing extraordinary photocatalysts for environmental purification.
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高影响因子
CEMENT & CONCRETE COMPOSITES
·
2023
·
IF 10.5
Zhongtao Luo,Tianyi Zhi,Xiaohai Liu,Kunpeng Yin,Han Pan,Hu Feng,Yatao Song,Yanfeng Su
The early hydration of UHPC can be retarded by the low water/binder ratio, the high polycarboxylate superplasticizers dosage, and the large supplementary cementitious materials (SCM) content. In this study, the effects of the prepared nanoscale C–S–H seeds and nano-silica (NS) on the early performance of UHPC were compared. The mechanism of nanomaterials influencing the early hydration of UHPC was further characterized by calorimetry , thermal analysis, nuclear magnetic resonance (NMR), and mercury intrusion porosimetry . The results showed that the 1-day compressive strength of UHPC samples with 0.3 wt% C–S–H seeds and NS increased by 457% and 25% respectively compared to the control sample. Compared to NS, C–S–H seeds were more effective in accelerating the early (before 3 d) hydration to produce hydrates and refine the pore structure of UHPC. The NMR results further implied that compared with the NS, the C–S–H seeds was 12% and 343% more efficient in accelerating the early hydration of cement and SCMs, respectively. However, the performance enhancement of nanomaterials was effective at 1 d and had little effect thereafter.
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高影响因子
Catalysts
·
2020
·Vol. 10
·期 6
·695
·
IF 3.52
Weiwei Fu,Zhiqiang Shi,Helong Bai,Jinyu Dai,Zhiming Lu,Feifei Lei,Deguang Zhang,Lun Zhao,Zongtao Zhang
Anatase nanoparticles (5–10 nm) generated on H-titanate nanotube surface (H-titanate/anatase) were prepared by an ingenious and simple method. H-titanate tubes were prepared by a hydrothermal reaction of Ti powder in concentrated NaOH solution and an ion exchange process with HNO3solution. After that, at a relatively low drying temperature (100 °C), a small quantity of anatase nanoparticles were in-situ formed on the H-titanate tubes surface by a surface dehydration reaction. In-situ transformation can form a strong interface coupling between H-titanate and anatase, which is conducive to accelerating charge transfer and improving its photocatalytic activity. In addition, the smaller average crystal size, the large specific surface areas (BET), the nanotubed and layered structure and the synergistic effect of dual phases would be beneficial to improving the photocatalytic efficiency.
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高影响因子
Materials
·
2019
·Vol. 12
·期 12
·1909
·
IF 2.972
Huilin Lun,Yi Zeng,Xiang Xiong,Lei Zhao,Dongling Li,Ziming Ye,Tianxiao Qian
Hexagonal boron nitride/silicon carbide (h-BN/SiC) ceramics were fabricated by a spark plasma sintering (SPS) method. Phase and microstructure of ceramics were characterized and observed, respectively, using the X-ray diffraction, scanning electron microscope and electron probe microanalysis. The effect of molar ratios of SiC toh-BN on the microstructure, relative density, hardness, thermal conductivity, and the heating rate by microwaves on the ceramics were investigated. The results showed that the orientation of flake-likeh-BN was significantly influenced by SiC content inh-BN/SiC ceramics. With the increasing of SiC content, theh-BN flakes gradually became an isotropic distribution from the preferred orientation aligning in a SPS pressure direction. The relative density ofh-BN/SiC ceramics was 97.6 ± 0.9% at a molar ratio of SiC toh-BN of 40/60 mol%. The preferential orientation ofh-BN flakes contributed to a relatively high thermal conductivity along the SPS pressure direction, which was beneficial to increasing the heating rate ofh-BN/SiC ceramics in microwave fields.
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高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
·
2017
·Vol. 36
·期 3
·406-416
·
IF 1.692
Bai Yang,Xie Fang-Yuan,Tian Wei
Despite the fact that some progress has been made in the self-assembly of H-shaped polymers, the corresponding self-assemblies that respond to external stimulus and are further utilized to adjust the release of drugs are still deficient. The stimuli-responsive segments with amphiphilic H-shaped structure are generally expected to enhance the controllability of self-assembly process. The synthesis and self-assembly behavior of thermo-responsive amphiphilic H-shaped polymers with poly(ethylene glycol) (PEG), polytetrahydrofuran (PTHF) and poly(N-isopropyl acrylamide) (PNIPAM) as building blocks are reported in this paper. The inner architecture structure and size of complex micelles formed by H-shaped self-assemblies were effectively adjusted when the solution temperature was increased above the lower critical solution temperature of PNIPAM segments. Furthermore, it was found that the architecture of self-assemblies underwent a transition from the complex micelles based on primary micelles with hybrid PEG/PNIPAM shells to large complex micelles based on primary micelles with hybrid PTHF/PNIPAM cores and PEG shells during the thermal-induced self-assembly process. The adjustable release rate of doxorubicin (DOX) from the DOX-loaded complex micelles and basic cell experiments further proved the feasibility of these self-assemblies as the thermal-responsive drug delivery system.
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高影响因子
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
·
2024
·Vol. 149
·期 23
·13759-13771
·
IF 3
Li Wenjie,Long Jiangfeng,Liu Sijia,Wang Peng,Xu Linglin,Lai Yong
To assess the feasibility of using C-S–H seeds to boost the anti-mechanical vibration capabilities of concrete, this work evaluated the mechanical properties, hydration kinetics, phase assemblage of hydrates, and pore structure of Portland cement (PC) and slag cement mortars, at varying dosages of C-S–H seeds. Results reveal that the incorporation of C-S–H seeds negatively affects the vibration resistance of neat PC, while it effectively enhances the vibration resistance of slag cement. The addition of these seeds facilitates cement hydration and improves the early mechanical properties, which is evident in the shortened appearance time of the hydration exothermic peak by almost 50%. The remarkable vibration resistance observed in slag cement primarily stems from the synergistic effect between C-S–H seeds and slag. However, the premature formation of the internal microstructure in neat PC due to C-S–H seeds disrupts the stability of mutual construction between hydration products. The findings indicate that C-S–H seeds can be used in engineering to enhance concrete lifespan, reduce road repair expenses, and enhance construction efficiency.
研究领域:
土木工程
·
建筑材料
·
胶凝材料
·
混凝土技术
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DOI
高影响因子
ACS Nano
·
2026
·
IF 17.3
Dongfang Shen,Yumeng Zhou,Ru Li,Shengkai Xia,Lingshuo Meng,Liang Zhang,Mingjia Zhang
The memtransistor constructed using the emerging two-dimensional tellurene material has demonstrated significant potential for application in artificial synaptic devices and image recognition. However, conventional device fabrication processes, such as dry transfer, restrict tellurene’s further application in flexibility and wearable electronics. Here, a fully printed, flexible tellurene field-effect transistor (FET) is demonstrated, consisting of a channel, gate dielectric layer, and contact electrodes, all of which are prepared using functional inks that include tellurene, h-BN, and graphene, respectively. Such a device integrates scalable ink formulations and neuromorphic functionality for advanced electronics, exhibiting relatively stable electrical performance even after 10,000 bending cycles at a curvature radius of 11.05 mm. Applying electric stimulation to the h-BN layer enables the realization of a bioinspired memtransistor, achieving paired-pulse facilitation, reconfigurable short-term plasticity to long-term plasticity transitions, and synaptic weight updates. Moreover, image recognition simulation using an artificial neural network achieves 93.91% accuracy on the Modified National Institute of Standards and Technology database, which can maintain 78.33% accuracy after introducing σ = 0.7 Gaussian noise. These results position printed tellurene FETs as promising, noise-resilient building blocks for scalable, flexible neuromorphic systems.
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DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 3
·123051
·
IF 7.5
Yonghao Wang,Shiying Li,Youmei Liu,Zhiwei Zou,Xiaomei Zheng,Yongjing Wang
Electrocatalytic nitrate reduction to ammonia (NO₃RR) offers a promising route for wastewater treatment and nitrogen resource recovery. In this work, a FeNi alloy-loaded carbon material (FeNi-C) was evaluated about NO 3 RR performance and the role of different active hydrogen (H*) was illustrated. FeNi(1:1)-C obtained at 700 °C exhibits a 96.6% NO 3 ⁻ -N removal and 99.6% NH₄ ⁺ -N selectivity at −1.5 V and it maintains excellent performance over 10 cycles without metal leaching. Furthermore, high-concentration nitrate can be converted to ammonium, recovered as struvite. Mechanism analysis indicate that a high surface coverage of adsorbed atomic hydrogen (H* ads ) is more crucial for enhancing the selectivity of nitrate-to-ammonia conversion compared with the free H*（H* free ）in the electrolyte. Tafel slope combined with verification experiments reveal that an optimal Ni 0 /Ni 2+ (≈2) facilitates water electrolysis to enables FeNi(1:1)-C forming a high surface coverage of H* ads . Thereby, FeNi(1:1)-C maintains an abundant H* ads -covered reductive-microenvironment surface, promoting fast conversion between H* ads and the adjacent nitrogen-containing intermediates and suppressing the competing hydrogen evolution reaction (HER). Furthermore, this reductive-microenvironment surface also helps protect the FeNi alloy from oxidation, endowing its superior stability. This work highlights the superior role of H* ads over H*（H* free ）in the electrolyte.
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高影响因子
Open Ceramics
·
2026
·
IF 3.4
Xingpu Hu,Zhaoran Li,Guoqi Liu,Fan Qian,Mao Chen,Yongqiang Chen
Side seal plates for thin-strip continuous casting require exceptional resistance to thermal shock, corrosion and wear, for which h-BN based ceramics serve as promising candidates. However, h-BN-ZrO 2 -SiC composites suffer from poor sintering densification. h-BN-ZrO 2 -SiC composites modified with varying amounts of B 2 O 3 as a single additive were prepared via vacuum hot-press sintering at 1550 °C, 1600 °C and 1650 °C. The phase composition, microstructure, relative density, flexural strength and thermal shock resistance were systematically investigated. The composite with 1 wt% B 2 O 3 sintered at 1650 °C achieved a flexural strength of 76.6 MPa, which was 42% higher than that of the additive‑free sample. The results revealed that B 2 O 3 facilitates the in-situ formation of ZrB 2 via a liquid‑phase sintering mechanism. This work clarified the modification mechanism of B 2 O 3 in h-BN-based composites, providing experimental basis and theoretical guidance for the development of h‑BN‑based ceramics used for side dams in thin‑strip continuous casting.
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高影响因子
Journal of Materials Chemistry A
·
2026
·
IF 9.2
Chenchen Xiong,Weihuan Li,Jiarui Xing,Shengjun Chen,Yulin Wang,Yang Zhou
Low toughness remains an enduring constraint to cementitious materials. Manipulating calcium silicate hydrate (C-S-H), the “genetic component” of cement, which determines mechanical properties of cementitious materials, presents an attractive strategy for intrinsic toughening. However, the modulation is constrained by small-length scale and limited enhancement. Herein, this work proposes an approach to fabricate nacre-mimetic C-S-H bulk composite with brick-mortar microstructure. The composite exhibits an excellent combination of high flexural strength, toughness and impact resistance, with toughness surpassing pure C-S-H and cement paste by factors of over 1000 times, and even outperforming that of natural nacre, reinforced cement-based materials and existing reported C-S-H-based materials. The nacre-mimetic C-S-H composite also exhibits a 20- to 30-fold increase in impact resistance and flexural strength compared to pure C-S-H, respectively. Multi-scale simulations reveal strengthening and toughening mechanisms, including molecular-scale coordination, nano-asperities, viscoplastic deformation, and crack deflection across micro-macro scales. The developed C-S-H nacre not only achieves remarkably high toughness and broadens the potential for scalable application, but also paves a way for designing advanced bioinspired cementitious and silicate-based materials in structural applications.
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