Energetic Materials Frontiers
·
2026
·
IF 3.9
Hui-jie Zhang,Jian-bin Li,Xin Yu,Su-hang Chen,Yu-qi Zhu,Shi-zhou Ma,Kai-chuang Zhang,Qi-hang Chen,Feng-qi Zhao,Kang-zhen Xu
The applications of boron-based (B) fuels in propulsion and weapon systems are hindered by inefficient combustion and harsh ignition conditions of B particles. Dual-functional energetic metal-organic frameworks (EMOFs) were synthesized on B surface by incorporating azide ligands as secondary ligands to improve the thermal and combustion properties of B particles. Polydopamine (PDA) interfacial layer was constructed between B and EMOFs to strengthen the interface interaction and facilitate the processes of mass and heat transfer. The mechanisms of EMOFs in eliminating the negative effects of oxide film and enhancing B combustion were analyzed. The results illustrate that the expansion of flame front is driven by the micro-explosion effect of azide ligands, and the flame height increases from 0.46 to 67.9 mm. Concurrently, the generated metal oxides alter the oxygen diffusion pathway by adhering to B surface, thereby significantly enhancing the oxidation process of B. The combustion efficiency of B increases from 60.7 % to 80.4 %, the oxidation temperature lowers by 77 °C, and the flame radiation intensity enhances by approximately 29 %. Crucially, the azide ligands and residual metal oxides exhibit different functions. The azide ligands exhibit the functions of ignition sensitization and micro-explosion at the combustion interface, while the adherent metal oxides promote the efficient oxidation of B particles along two distinct pathways. This innovative strategy of integrating azide ligands and metal oxides offers a novel direction for enhancing the energy release performance of B-based fuels.
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Surfaces and Interfaces
·
2025
·
IF 6.3
Chun Yu,Liangzhen Zhu,Yanjin Lu,Yi Zhao
CoCr-based alloys are widely utilized in dental implants and serve as metallic frameworks for porcelain-fused-to-metal (PFM) restorations, owing to their cost-effective, excellent wear and corrosion. However, interfacial failure between the base alloy and the porcelain arose over extended periods of use in oral environments. Therefore, establishing a reliable metal-porcelain interface is of critically importance. This study investigates how the addition of boron impacts the pre-oxidation scale and its mechanical properties of Co-Cr-W-Cu-Si-(0, 0.5, 1.1 wt.%) B alloys at 928 °C for 10 mins in air. Surface analysis indicated that Si and B stabilized Cr 2 O 3 scale grown on the surface of CoCr based alloys. As the B concentration increased, the scale became thinner, and its morphology transformed from Cr 2 O 3 to a combination of outer CoCr 2 O 4 spinel and inner Cr 2 O 3 . Amorphous SiO₂ was detected along the scale-alloy interface together with B 2 O 3. The mechanical stability of the scale along with its adhesion to the matrix increases with increasing B concentration. The synergistic impact of Si and B is probably due to the amorphous innerlayer playing as an effective barrier to the transportation of reactants and slow down the oxide scale growth. Meanwhile, the morphology of pining-like arrangement for amorphous SiO 2 layer increases the factual contact area between the oxide scale and matrix, rendering it less susceptible to fracture.
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Advanced Science
·
2025
·Vol. 12
·期 30
·e01908
·
IF 14.1
Ningqiang Shi,Xiaofei Xiao,Mingyu Zhang,Zhijun Li,Chuncheng Ban,Jinchang Meng,Nannan Shi,Mingyang Wu,Zebo Zheng,Ling Li
Boron nitride nanotubes (BNNTs) are an emerging mid-infrared optical material that exhibits significant potential in nanoscale resonators, lasers, detectors, and sensors due to the strong light-matter interactions induced by phonon polaritons (PhPs). However, the large-scale controllable synthesis and device applications of BNNTs still face huge challenges. In this study, a substrate-pretreated and boron source dual-catalyst infiltrated growth method, and a damage-free purification method toward the high-density and aligned BNNT (ABNNT) thin films is developed. The polarization sensitivity and linear dichroism characteristics of BNNTs with a maximum anisotropy ratio of 4.53 in the mid-infrared and near-infrared regions are comprehensively verified. The nanotube-alignment induced permittivity anisotropy outside RB and the near-isotropic PhP absorption within RB enable a wavelength-selective polarizer and absorber throughout a broad infrared range. Uniquely, the BNNT polarizer exhibits excellent stability of polarization dichroism under severe bending conditions, demonstrating great potential in flexible and wearable optical devices. This work can initiate the utilization of high-density BNNT thin films in quantum information processing and high-resolution infrared imaging applications.
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JOURNAL OF CHROMATOGRAPHY A
·
2023
·
IF 4.1
Xian Wang,ShiJiang Qin,Guocan Zheng,Weili Wei,Fang Li,Yao Luo,JinJing Tang,Kai Zhou
Surface-assisted laser desorption/ionization time-of-flight mass spectrometry (SALDI-TOF MS) is an effective method for detecting of low-mass molecules. In this study, two-dimensional boron nanosheets (2DBs) were fabricated through thermal oxidation etching and coupling liquid exfoliation technologies, and applied as a matrix and selective sorbent for detecting cis -diol compounds by SALDI-TOF MS. The outstanding nanostructure and boric acid active sites of 2DBs endow them with sensitivity for cis -diol compound detection, excellent selectivity, and low background interference for complex samples. The specific in-situ enrichment faculty of the 2DBs as a matrix was investigated by SALDI-TOF MS using glucose, arabinose, and lactose as model analytes. In the presence of 100 -fold more interfering substances, the 2DBs showed high selectivity against cis -diol compounds, and exhibited a better sensitivity and a reduced limit of detection through enrichment treatment than graphene oxide matrices. The linearity, limit of detection (LOD), reproducibility, and accuracy of the method were evaluated under optimized conditions. The results showed that the linear relationships of six saccharides remained in the range of 0.05–0.6 mM with a correlation coefficient r ≥0.98. The LODs of six saccharides were 1 nM (glucose, lactose, mannose, fructose) and 10 nM (galactose, arabinose). Sample-to-sample (n = 6) with relative standard deviations (RSDs) of 3.2% to 8.1% were observed. Recoveries (n = 5) of 87.9–104.6% were obtained at three spiked levels in the milk samples. The proposed strategy promoted the development of a matrix for use with SALDI-TOF MS detection, in which the UV absorption properties and enrichment capabilities of 2DBs were combined.
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JOURNAL OF CATALYSIS
·
2023
·
IF 7.3
Fan Wu,Zhankai Liu,Jian Sheng,Lihan Zhu,Wen-Duo Lu,Bin Qiu,Dongqi Wang,An-Hui Lu
Boron-based catalysts are active and selective in the oxidative dehydrogenation reaction of propane (ODHP) to propylene. Herein, the binary boron-based compounds (boron nitride, boron phosphide, boron carbide, and silicon boride) composed of boron elements and one type of other non-boron elements, and the elemental boron were systematically compared to elucidate how the non-boron elements of binary borides influence their catalytic activity in ODHP. By combined experimental and computational studies, we demonstrated that the non-boron elements can modulate the performance of catalysts by altering the ability of the B-OH site to activate dioxygen and the subsequent activation of propane. In particular, the turnover frequency (TOF) of the catalyst exhibited a high negative linear correlation with the electronegativity of the non-boron element, except for the boron phosphide. This study highlights the importance of the chemical environment around the active boron sites and provides insight into the design of efficient ODHP catalysts.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2023
·
IF 4.2
Min Li,Chenglong Qiu,Tulai Sun,Xiaosa Wang,Liwei Xia,Xinying Yang,Wei Zhao,Huaijie Shi,Lei Ding,Xing Zhong,Yihan Zhu,Jianguo Wang
A major challenge that limits the applications of nanostructured electrocatalysts is precise surface structure regulation. The critical performance-impeding factors for the important electrochemical ozone production (EOP) lie in the leaching-induced poor stability as well as the competing oxygen evolution and ozone production reactions over the most promising platinum-based electrocatalysts. Although composition diversification by alloying appears to be a prevailing strategy to optimize platinum-based electrocatalysts, a practical restriction turns out to be the inevitable surface segregation and termination of platinum-enriched structures due to their lower surface energies. In this work, we introduce the nanoconfinement of intermetallic platinum–nickel nanostructures encapsulated by boron carbide, which effectively frustrates the surface segregation of alloy nanostructures and well maintains the pristine termination of the alloy. Precise atomic-level structural elucidation and model construction of the encapsulated alloy nanostructures are achieved by quantitative electron microscopy. The composite nanoalloy with a unique surface termination evokes synergetic catalytic effects that promote the charge transfer between the surface and adsorbed oxygen intermediates, which entails outstanding EOP performance with a high Faraday efficiency of 14.8% in neutral media and long-term stability of up to 120 h as a qualified electrocatalyst for the EOP electrolyzer devices. More importantly, the current work paves a new route to overwhelm the thermodynamically limited surface structures of bare nanoalloy catalysts through diverse nanoconfinement strategies.
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Journal of Manufacturing Processes
·
2023
·
IF 6.2
Shuye Zhang,Jincheng Lin,Ce Wang,Peng He,Wei Wang,Xinfei Zhang,Tong Wu,Han Mei,Yue Liu,Panpan Lin,Tiesong Lin
The brazed joint of sapphire transparent ceramic and Kovar alloy was prepared using AgCuTi and AgCuTiB composite filler, and the main focus was the effect of B element on the wetting behavior, interface composition and joint mechanical performance. The reliable joint of sapphire transparent ceramic and Kovar alloy was obtained by vacuum brazing with AgCu28-6Ti-0.45B (wt%) composite filler. The typical interfacial structure of the joint brazed at 825 °C for 10 min was determined as sapphire/Ti 3 Cu 3 O/Ag(s,s) + Cu(s,s) + disperse TiB/TiFe 2 + TiNi 3 /Kovar. The results showed that the addition of B could contributed to an optimized interfacial structure via (i) in-situ forming fine TiB whisker reinforcement phase and refining the interface structure and (ii) reducing the diffusion degree of alloy side elements to inhibit the generation of brittle phase, and the maximum shear strength of the joint with AgCu28-6Ti-0.45B (wt%) reached 125 MPa more than twice the joint without B additive. On the other hand, the wetting experiment showed that the addition of B as a solid particle decreased the fluidity of the composite filler, and when the addition of B was excessive, no dense TiB whiskers were produced in the interface. This study provides ideas for the optimization and improvement of sapphire composite connection, and points out that the generation of reinforcing phase is accompanied by the reduction of fluidity, so it is necessary to reasonably control the proportion of reinforcing phase.
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Nature Communications
·
2022
·Vol. 13
·期 1
·1-16
·
IF 17.694
Meng Yun,Chen Lijie,Chen Yang,Shi Jieyun,Zhang Zheng,Wang Yiwen,Wu Fan,Jiang Xingwu,Yang Wei,Zhang Li,Wang Chaochao,Meng Xianfu,Wu Yelin,Bu Wenbo
Bacteria and excessive inflammation are two main factors causing non-healing wounds. However, current studies have mainly focused on the inhibition of bacteria survival for wound healing while ignoring the excessive inflammation induced by dead bacteria-released lipopolysaccharide (LPS) or peptidoglycan (PGN). Herein, a boron-trapping strategy has been proposed to prevent both infection and excessive inflammation by synthesizing a class of reactive metal boride nanoparticles (MB NPs). Our results show that the MB NPs are gradually hydrolyzed to generate boron dihydroxy groups and metal cations while generating a local alkaline microenvironment. This microenvironment greatly enhances boron dihydroxy groups to trap LPS or PGN through an esterification reaction, which not only enhances metal cation-induced bacterial death but also inhibits dead bacteria-induced excessive inflammation both in vitro and in vivo, finally accelerating wound healing. Taken together, this boron-trapping strategy provides an approach to the treatment of bacterial infection and the accompanying inflammation.
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ENVIRONMENTAL TECHNOLOGY
·
2023
·
IF 2.8
Ming Li,Yongqing Luan,Zhe Qin,Da Lu
In order to solve the complicated control of dissolved oxygen (DO) for partial nitrification in bioreactors treating high NH4+−N wastewater, a large height-diameter ratio anammox pre-reactor system was developed. And in this reactor, NO2−−N accumulation rate can reach 85.76% by alternate feeding with high NH4+−N wastewater (150 mg NH4+−N/L) and low NH4+−N wastewater (50 mg c) with low DO (0.19 mg/L–0.62 mg/L). Based on 16S rRNA identification technology, it was found that Nitrosomonas had a significant effect on NH4+−N oxidization in this study. And when the reactor treated higher concentration wastewater (250 mg NH4+−N/L), the growth rate of Nitrosomonas was higher than that of Nitrospira (nitrite-oxidizing bacteria, NOB), which was conducive to improving the NO2−−N accumulation rate and realizing partial nitrification stably. It was also found that the material exchange frequency of the microbial flora during alternate feeding with different NH4+−N concentration wastewaters was higher than that during feeding with higher NH4+−N concentration wastewater (250 mg/L) by Kyoto Encyclopedia of Genes and Genomes (KEGG) metabolism pathways analysis. This study can provide valuable insights and lay the foundation for building anammox pre-reactors.
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PROPELLANTS EXPLOSIVES PYROTECHNICS
·
2022
·Vol. 48
·期 3
·e202200277
·
IF 2.134
Yang-Fan Cheng,Yu-Le Yao,Dan-Yi Li,Zi-Han Li,Ying-Kang Yao
To study the effects of boron powders on the detonation performance of emulsion explosives, the explosion temperature field, shock wave parameters and explosion heat of emulsion explosives were studied. The differences of boron powders with and without microcapsule cladding on improving the explosion performance were also discussed. Experimental results showed that, when the mass ratio of boron powders increased from 0 to 20 mass %, the average explosion temperature, explosion pressure, positive impulse and explosion heat of boron-containing emulsion explosives increased at first and then decreased. When the content of boron powders was 16 mass %, the average explosion temperature, explosion pressure, positive impulse and explosion heat of emulsion explosives reached their maximum values of 2521 K, 0.0385 MPa, 7.11 Pa ⋅ s and 6335 kJ/kg, which were 22.2 %, 30.1 %, 43.0 % and 42.1 % higher than those of the pure emulsion explosive (Sample A), respectively. Furthermore, the explosion temperature, positive impulse and explosion heat of emulsion explosive with boron powder-microcapsule (Sample B5) were up to 2648 K, 7.65 Pa ⋅ s and 6694 kJ/kg, increased by 5.0 %, 7.6 % and 5.7 % when compared with those of emulsion explosive with 16 mass % boron powders (Sample B3). Therefore, micro-encapsulation technology could improve the detonation performance of boron-containing emulsion explosives, which would be helpful to the formula design of high energy emulsion explosives.
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Small
·
2023
·Vol. 19
·期 14
·2206933
·
IF 13.3
Nanyang Wang,Liping Ding,Taotao Li,Kai Zhang,Liyun Wu,Zhengyang Zhou,Qian He,Xuhua He,Xuebin Wang,Yue Hu,Feng Ding,Jin Zhang,Yagang Yao
The large-scale synthesis of high-quality boron nitride nanotubes (BNNTs) has attracted considerable interests due to their applications in nanocomposites, thermal management, and so on. Despite decades of development, efficient preparation of high-quality BNNTs, which relies on the effective design of precursors and catalysts and deep insights into the catalytic mechanisms, is still urgently needed. Here, a self-catalytic process is designed to grow high-quality BNNTs using ternary W–B–Li compounds. W–B–Li compounds provide boron source and catalyst for BNNTs growth. High-quality BNNTs are successfully obtained via this approach. Density functional theory-based molecular dynamics (DFT-MD) simulations demonstrate that the Li intercalation into the lattice of W 2 B 5 promotes the formation of W–B–Li liquid and facilitates the compound evaporation for efficient BNNTs growth. This work demonstrates a high-efficient self-catalytic growth of high-quality BNNTs via ternary W–B–Li compounds, providing a new understanding of high-quality BNNTs growth.
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ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 33
·期 48
·2304450
·
IF 19
Zhengyang Zhou,Kai Zhang,Guang Xiao,Ying Wang,Qian He,Nanyang Wang,Liyun Wu,Yagang Yao
Boron nitride nanotubes (BNNTs) are promising materials due to their unique physical and chemical properties. Fabrication technologies based on gas-phase reactions reduce the control and collection efficiency of BNNTs due to reactant and product dispersion within the reaction vessel. A surface growth method that allows for controllable growth of BNNTs in certain regions using a preburied boron source is introduced. This work leverages the high solubility of boron in metals to create a boronized layer on the surface which serves as the boron source to confine the growth of BNNTs. Dense and uniform BNNTs are obtained after loading catalysts onto the boronized substrate and annealing under ammonia. Confirmatory experiments demonstrate that the boride layer provides boron for BNNTs growth. Furthermore, the patterned growth of BNNTs is realized by patterning the boronizing region, demonstrating the controllability of this method. In addition, the Ni substrate with BNNTs growth exhibits better performance in corrosion resistance and thermal conductivity than pure Ni. This study introduces an alternative strategy for the surface growth of BNNTs based on boron source design, which offers new possibilities for the controllable preparation of BNNTs for various applications.
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