CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Kangjia Song,Jie Liu,Feifei Zhang,Chenduo Zhang
A high bio-based content (86.3 wt%) waterborne polyurethane was designed using renewable PLA, HCO, and PDI. • Oxime groups and UPy quadruple hydrogen bonds synergistically enhance mechanical properties and self-healing capability. • h-BN doping increases thermal conductivity by 112% and enables photothermal healing. To address the inherent conflict between the environmental sustainability and material durability of bio-based waterborne polyurethane (BWPU), this research proposes a synergistic strategy that integrates bio-based materials, functional nanofillers, and dual dynamic bonding networks. These networks consist of quadruple hydrogen-bonding arrays from 2-amino-6-methylpyrimidin-4(3H)-one (UPy) units and dynamic covalent oxime bonds. Firstly, a series of oxime-containing BWPUs was synthesized from bio-based polylactic acid polyol (PLA), hydrogenated castor oil (HCO), and 1,5-pentamethylene diisocyanate (PDI), with dimethylglyoxime (DMG) or 1,4-benzoquinone dioxime (BQDO) as chain extenders instead of conventional small-molecule diols, i.e., 1,4-Butanediol (BDO). Subsequently, a dual dynamic crosslinked network was established via end-capping modification with UPy. Finally, the hexagonal boron nitride (h-BN) was incorporated to enhance thermal conductivity of composite material. The experimental results showed that, compared with the single oxime-based system, the dual dynamic network constructed based on the oxime-urethane and UPy quadruple hydrogen bonds (BWPU-Q-U10) significantly enhances the comprehensive mechanical properties. The toughness of the BWPU-Q-U10 film increases from 1660.3 MJ/m 3 to 2907.4 MJ/m 3 . Furthermore, this material achieves a self-healing efficiency of 97.2% within 24 h at room temperature (25 °C), demonstrating an optimal synergy between mechanical properties and self-healing efficiency. On this basis, the introduction of 10 wt% h-BN, identified as the optimal loading, increases the thermal conductivity of the composite by 112%. Meanwhile, leveraging the photothermal effect of BQDO, this composite achieves a healing efficiency of 86.3% within 5 min under 365 nm UV irradiation. This research presents a durable, bio-based waterborne polyurethane for smart coatings that achieves rapid self-healing while maintaining environmental sustainability. Download: Download high-res image (168KB) Download: Download full-size image
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高影响因子
NANO
·
2026
·
IF 1.3
Jia Wang,Lin Gao,Chuanyao Dong,Kan Zhang
To enhance the service performance of titanium alloys for demanding high-end equipment applications, an h-BN/SiC-Ti-MAO composite coating was fabricated on Ti6Al4V via one-step micro-arc oxidation (MAO). Optimizing the SiC additive concentration offers an effective way to improve the overall performance of the composite coating in mechanical, tribological, oxidation resistance and anti-corrosion properties. The research results show that the coating prepared with 4 g/L SiC yielded superior multifunctional properties. It possessed a dense microstructure with the lowest porosity (6.45%), high hardness (712 HV) and excellent adhesion. This coating maintained a low friction coefficient of approximately 0.20 from RT to 5 0 0 ∘ C and exhibited the best oxidation resistance at 6 0 0 ∘ C, with a parabolic rate constant ( K P ) of 3 . 3 3 × 1 0 − 4 . Electrochemical tests in 3.5 wt.% NaCl solution further confirmed its optimal anti-corrosion, showing the lowest corrosion current density ( 3 . 3 2 5 × 1 0 − 9 A/cm 2 ) . In contrast, insufficient SiC concentration results in limited performance improvement of the composite coating, whereas excessive concentration introduces microstructural defects, ultimately degrading the overall performance. This study demonstrates that optimized h-BN/SiC co-doping represents an effective strategy for developing high-performance MAO protective coatings on titanium alloys.
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高影响因子
TRIBOLOGY INTERNATIONAL
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2026
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IF 7.6
Heng An,Xianjun Hou,Kangjun Tan,Danjiao Zhao,Weiwei Guan
： Hexagonal boron nitride (h-BN) is an environmentally friendly lubricant that shows great potential in lubrication applications. However, there is currently a lack of research on the synergistic mechanisms of carboxylic acid-modified h-BN at different friction interfaces. In this study, the tribological mechanism of carboxylic acid-modified h-BN across various contact interfaces was investigated through experimental and molecular dynamics simulations. At the steel-steel contact, wear reductions relative to the base oil were 21.74% for unmodified h-BN, 58.94% for oleic acid (OA)-modified h-BN, and 55.80% for stearic acid (SA)-modified h-BN. At the alumina-steel contact, the corresponding wear reductions were 8.50%, 25.30%, and 23.54%, respectively. Additionally, at the alumina-steel contact, OA-modified and SA-modified h-BN reduced the coefficients of friction by 35.18% and 23.32%, respectively, compared with the base oil. Simulations revealed the adsorption mechanism of carboxylic acids: the carboxyl group anchors to the metal or oxide surfaces, while the alkyl end is compatible with the base oil. Among these, the conformational flexibility of the C=C bond in the OA molecule enables the synergistic anti-wear effect between OA and h-BN. This research outcome can guide the development of high-performance nano-lubricants suitable for multiple interfaces.
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高影响因子
CHINESE JOURNAL OF CATALYSIS
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2026
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IF 17.2
Junbo Tian,Peng Zheng,Shuang Deng,Yongjun Ji,Tengfei Zhang,Zhiyi Sun,Wenxing Chen,Yi-Chi Wang,Lin Gu,Dong Su,Guangwen Xu,Ziyi Zhong,Fabing Su
Understanding reconstructed interfacial sites is crucial for enhancing the catalytic conversion efficiency, as these sites can facilitate reactant adsorption, transformation, and desorption. Herein, we report an unconventional interfacial structure of Pt σ + –O–Ti 4+ –H δ + –oxygen vacancy (OV), in which atomic hydrogen binds to Ti 4+ sites via a charge-compensation mechanism involving subsurface OVs. This restructuring induced by hydrogen creates electron-rich Pt centers and interfacial oxygen, resulting in spatial elongation of the Pt–O and O–Ti bonds. This Pt σ + –O site, stabilized by –Ti 4+ –(H–OV), promotes the activation of CO adsorption/interfacially absorbed oxygen and interfacial lattice oxygen, effectively coupling the Langmuir-Hinshelwood and Mars-van Krevelen pathways. These sites facilitate the rapid CO 2 formation and desorption. Consequently, this system achieves complete CO conversion at 120 °C with an ultralow Pt loading of 0.17 wt% (even in the presence of 0.005% SO 2 and 10% vol H 2 O) and a 59-fold increase in turnover frequency compared to the control sample lacking this interfacial structure.
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高影响因子
CATALYSIS LETTERS
·
2026
·Vol. 156
·期 3
·80
·
IF 2.5
Li Xincheng,Huang Pengpeng,Fan Mingming,Zhang Pingbo
Isostearic acid, a bio-based and environmentally friendly chemical, has attracted considerable attention because of its high value as an oleic acid derivative. The synthesis of isostearic acid via oleic acid isomerization over commercial H-ZSM-5 zeolites is limited by low yield and acid value, mainly due to diffusion constraints. To address this issue, a hierarchical-pore H-ZSM-5 zeolite (Meso-5) was synthesized using Silicalite-1(S-1) as a seed crystal to enhance diffusion and catalytic performance. The catalyst was comprehensively characterized by XRD, SEM, BET, TGA, FT-IR, and Py-FTIR. Meso-5 efficiently catalyzed the isomerization of oleic acid, attributed to its abundant Brønsted and Lewis acid sites whose synergistic interaction significantly promoted the formation of branched-chain products. The catalyst delivered a selectivity of 87.3% with a 71.1% yield in the first run, and even after five reuse cycles it maintained 82.1% selectivity with a 55.6% yield. Evidently, the hierarchical pore structure of the catalyst significantly facilitated the diffusion of oleic acid molecules and their isomerized intermediates, thereby enhancing the overall catalytic activity. The resulting isostearic acid was purified via a simple recrystallization procedure to a purity of 83.4% and an acid value of 186.7 mg KOH/g, both meeting the standards of commercial isostearic acid. These findings provide a robust basis for further catalyst optimization and scale-up toward industrial isostearic acid production. Graphical A tandem catalytic route combining ZSM-5-driven isomerization with Ni/C-catalyzed hydrogenation enabled the efficient conversion of oleic acid to isostearic acid. The hierarchical H-ZSM-5 structure enhanced branched-chain formation, ensuring high selectivity and yield toward the desired product
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Shiqiang Xu,Ziyu Song,Haotian Zhang,Zepeng Hou,Xian Zhou,Yingjie Yang,Xiaofeng Gao,Lili Lin,Siyu Yao
Subsurface metal promoted boron-based catalysts (M@BO x ) have demonstrated excellent activity and olefin selectivity in the oxidative dehydrogenation of propane (ODHP) through the efficient regulation of the special radical pathways. In this study, we discovered convincing subsurface metal dependent kinetic behaviors of the M@BO x catalysts which serve as powerful evidence to interpret the function of subsurface metal promoters in the ODHP reaction. The dependence of reaction rate with the partial pressure of propane and oxygen was determined and significant change of kinetic behaviors was resolved with the change of metal promoters, including the propane reaction order ranging from 1.93 to 2.44 and the turning O 2 pressure in the rate- P O2 profiles. Based on the kinetic equations derived from the reaction mechanism and the steady-state approximation, subsurface metal promoters modulate the contributions of surface and gas-phase reactions by influencing the initiation of reactive radicals both on the surface and in the gas phase. The reaction order of propane is positively correlated with the ratio of BO-H dissociation/regeneration rates ( k 1 / k 2 ), but high catalytic ODHP performance can only be realized at an appropriate k 1 / k 2 ratio. Similar trend is also observed regarding the partial pressure of oxygen. Therefore, the kinetic studies experimentally demonstrate the strong ability of subsurface metal in changing the radical initiation behaviors of supported boron oxide active species, pointing out that balancing the O-H bond dissociation and regeneration rates are highly important to achieve high performance in ODHP reaction.
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高影响因子
CATALYSIS TODAY
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2022
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IF 6.562
Xinyi Xing,Ying Guan,Liping Zhang,Xian Shi,Han Wu,Hui Gao,Siquan Xu
A catalytic system that is both efficient and recyclable is desirable for production 5-hydroxymethylfurfural (HMF) from glucose. In this study, the catalytic system composed of H 2 O (NaCl) -tetrahydrofuran (THF) biphasic system and H-β zeolite was found to have excellent performance for the glucose conversion into HMF. The physicochemical properties of the H-β zeolite catalyst, the dosage of the system components, and the reaction parameters were investigated in detail to optimize the production efficiency of HMF. Under optimal reaction conditions, an advanced level of 84% HMF yield was obtained from glucose. After the reaction was completed, all components of the catalytic system can be recovered, realizing no waste of reagents. Moreover, the recycled H-β(30) zeolite catalyst maintained considerable catalytic stability after five consecutive cycles. Therefore, it is reasonable to believe that the efficient, inexpensive, and recyclable H 2 O (NaCl) -THF catalytic system containing H-β(30) zeolite is capable of showing promising application potential in the future.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2022
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IF 4.831
Kun Ge,Qiyue Wu,Yonghui Li,Ying Gu
In this work, a hexagonal boron nitride (h-BN)/AuAg nanoalloy hybrids (NAHs) was synthesized to fabricate h-BN/Au 1 Ag 3 membrane as a solid surface-enhanced Raman spectroscopy (SERS) substrate for sensitive SERS detection of melamine. The AuAg nanoalloys were in situ grown on h-BN by chemical reduction method, and the Au/Ag molar ratio was tuned to achieve optimal SERS performance. After the SERS performance of h-BN/AuAg NAHs with different Au/Ag ratios was analyzed, h-BN/Au 1 Ag 3 NAHs were chosen for SERS analysis. The h-BN/Au 1 Ag 3 membrane can be obtained through simple filtration of h-BN/Au 1 Ag 3 NAHs on chromatographic paper. As expected, the solid SERS substrates of h-BN/Au 1 Ag 3 membrane were uniform and demonstrated good selectivity, repeatability and reproducibility for SERS detection of melamine. The results demonstrate that h-BN/Au 1 Ag 3 membrane exhibited high SERS activity for 4-mercaptobenzoic acid (4-MBA) with limit of detection (LOD) at 1.0 ng L −1 , and its analytical enhancement factor (AEF) reached 3.6 × 10 8 . The possible enhancement mechanism, including electromagnetic mechanisms (EM) and chemical mechanisms (CM) were illustrated by finite-difference time-domain (FDTD) and density functional theory (DFT) simulations in detail, respectively. The concentration of melamine in the 0.05–5.0 mg L −1 range showed good linear relationship ( R 2 = 0.9940) with SERS intensity with LOD of 0.01 mg L −1 . Finally, the recoveries of melamine in liquid milk samples are 87.7–105.7% with relative standard deviations (RSDs) in range of 0.6–2.6%, providing precise safety evaluation of melamine in milk samples.
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PubMed
高影响因子
DYES AND PIGMENTS
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2022
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IF 5.122
Bing Liu,Jin Fan,Wenzhao Liu,Guannan Zhang,Zhaoyang Wu
The structural color of photonic crystals is usually whitish and has low saturation due to multiple incoherent scattering effects, limiting its application in practical visual observation. Herein, by controlling the calcination time of [email protected] 2 nanoparticles , we obtain hollow SiO 2 with different in situ generated carbon black contents and assemble them into photonic crystal inks (PCIs). PCIs have excellent saturation and high crystallinity due to the in-situ generated carbon black capable of absorbing incoherently scattered light without affecting particle assembly. PCIs are further converted into non-close-packed photonic crystal films with highly saturated structural colors by photopolymerization of resins. This photonic crystal film can be swollen by an ethanol-water mixture, resulting in structural color changes and shifts in reflection peaks. Moreover, the photonic crystal film can dynamically change from a dry opaque state to an ethanol-wetted translucent state. Such solvent-responsive photonic crystal films with highly saturated structural colors are expected to be used in alcohol sensors and color anti-counterfeiting labels.
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高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2022
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IF 5.141
Teng Du,Miao Cui,Yue Chao,Yuxuan Xiao,Ziqi Ren,Yonglin An,Changgong Meng
Photocatalytic application is obstructed by the self-aggregation and low specific surface area of nano materials. High dispersion of SmVO 4 nanoparticles on HMOR zeolite (HMOR) were prepared by template-free method. Not only the agglomeration of nanomaterials is restrained, but also the combination of low-cost zeolite and semiconductor to prepare high-performance photocatalyst is conducive to the rational utilization of resources. Sm(NO 3 ) 3 ·6H 2 O and NH 4 VO 3 were used as precursors, and mixed with HMOR to prepare SmVO 4 /HMOR by precipitation method.. This method does not use any templates and surfactants, realizing the high dispersion of SmVO 4 nanoparticles on the surface of HMOR with the particle size are 17 ∼ 23 nm. The photocatalytic activity of SmVO 4 /HMOR was tested by degradation of rhodamine B (RhB). Compared with the monomer of SmVO 4 , the degradation rate of 29.81 wt% SmVO 4 /HMOR was increased from 33.12 % to 70.99 % under visible light irradiation for 2.5 h. The rate constant k (0.50 h −1 ) was boosted to 2.9 times as much as SmVO 4 monomer (0.17 h −1 ). When 3.7 wt% H 2 O 2 (30 %) was added into the photocatalytic system, the photocatalytic degradation rate could reach 93.26 % within 30 min. The synergistic effect of SmVO 4 and HMOR is critical on the improvement of the removal efficiency of RhB. SmVO 4 in the form of nanoparticles on the HMOR support has high photocatalytic activity. In addition, HMOR acted as electron acceptor to accelerate the transfer efficiency of photoelectrons, inhibiting the recombination of charges and improve the photocatalytic efficiency.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2022
·
IF 9.136
Yun-fei Zhang,Chun-hui Zhang,Yu-feng Liu,Dan Li,Jian-hui Xu,Lei Li,Qi Wu,Jin-hong Fan,Lu-ming Ma
Herein, the SiC-Fe 0 powders were mechanically synthesized and employed for activation of peroxymonosulfate (PMS) to remove florfenicol (FLO). Compared to Fe 0 /PMS system, up to a 3.97-fold increase in degradation rates of 20 mg/L FLO was observed by 25% ( w / w ) SiC-Fe 0 /PMS system in 5 mins, which could be attributed to the increased specific surface area and electron transfer rate of SiC-Fe 0 . Both the radical and non-radical processes were involved in the SiC-Fe 0 /PMS system, in which 1 O 2 and • O 2 − played the dominant role in the FLO degradation and SO 4 •− as well as • OH also participated in the system. ROSs investigation suggested that 1 O 2 , • O 2 − , SO 4 •− were mainly generated from the decomposition of PMS and • OH was mainly derived from the ZVI (or Fe 2+ )-catalyzed activation of O 2 . Meanwhile, H* has a nonnegligible role in PMS activation or the transformation of iron species. Five intermediates of FLO in SiC-Fe 0 /PMS system were identified and a significant removal of the overall toxicity was observed. The degradation pathways of FLO were proposed to be hydrolysis, hydroxylation and dechlorination. Besides, this SiC-Fe 0 /PMS system shows effective removal rate for 2-chlorophenol, acetaminophen, tetrabromobisphenol A and carbamazepine, and the FLO-polluted surface water and artificial wastewater. Overall, this study demonstrated that SiC-Fe 0 was promising in practical application and provided new insights into the generation mechanisms of ROSs in the ZVI/PMS system.
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2021
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IF 6.953
Xiaoyu Xia,Xiaoyi Tan,Chao Wu,Yao Li,Guanghua Zhao,Ming Du
The aggregation-induced emission (AIE) material has been widely used in biological detection due to their unique property of fluorescing in aggregation state. However, the poor dispersion and biocompatibility limit its application in in vivo real-time imaging. Here, a novel strategy is designed to obtain pH-responsive AIE nanomaterials, working through 4-Undecoxy Tetraphenyl Ethylene Methacrylate (PM1) block, with excellent features (dispersion, biocompatibility, self-reconstruction and cancer specific recognition). The recombinant human H-ferritin (rHuHF) was used to prepare rHuHF-PM1 nanocomposites which effectively supported the dispersion and transfer of PM1 in the biological environment, even making it target tumor cells due to the overexpression of ferritin receptors on tumor cells. To simulate the changes of rHuHF in intracellular lysosomes, particle size and fluorescence of rHuHF-PM1 were analyzed, which reflected the loose structural changes of rHuHF nanocages in weak acid system that facilitated the degradation of macromolecular rHuHF in intracellular lysosomes and following release of PM1. The released PM1 molecules aggregated and emitted brilliant blue fluorescence. Several cell lines, Hela, HT-29, HepG2, L-O2 and HUVEC have all been sensitively detected and distinguished. Accordingly, this nanocage has a potential to be applied to disease diagnosis and provides a novel sensing platform for the identification of cancer.
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PubMed
高影响因子
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