ACS Catalysis
·
2025
·
IF 13.1
Lei Wang,Yusen Yang,Shuyue Song,Yawen Shi,Weimin Da,Zhaowei Tian,Yuan Deng,Meng Zhang,Xin Zhang,Lirong Zheng,Tianwei Tan,Min Wei
Deoxygenation of biomass-derived fatty acids is a renewable and effective route for the production of diesel-range alkanes and fine chemicals; however, a high selectivity toward a single-target product is rather challenging. Herein, a Ni4Fe1 alloy catalyst was prepared via topological transformation of hydrotalcite precursor, which was featured with an interface structure (Niδ+–Feδ−) originating from electron transfer from Ni to Fe. The Ni4Fe1 catalyst shows a switchable product selectivity in hexadecanoic acid hydrogenation reaction by using different solvents: hexadecanol (yield: 97%) is obtained with dioxane as a solvent, whereas pentadecane (yield: 98%) is attained with dodecane as a solvent. In addition, in the presence of a physical mixture catalyst containing Ni4Fe1 and ZSM-5 (1:9, m/m) with dodecane as a solvent, hexadecane (yield: 94%) is obtained. A comprehensive study including temperature-programmed surface reaction with a mass spectrometer (TPSR-MS), in situ Fourier transform infrared (FT-IR), molecular dynamics simulations, and density functional theory (DFT) calculations reveals that hexadecanol serves as the key intermediate that determines the final product through different transformation pathways. High-binding energy between hexadecanol and dioxane solvent induces the desorption of hexadecanol from the Ni4Fe1 catalyst surface as the final product; in contrast, weak interaction between hexadecanol and dodecane solvent results in the subsequent decarbonylation (C–CO* bond cleavage) of intermediate on the surface of Ni4Fe1 with pentadecane as the final product (a cascade reaction on the same catalyst). In the case of the mixture catalyst, a cascade reaction on different catalysts is established: the hexadecanol intermediate undergoes desorption from Ni4Fe1, experiences activation adsorption, and C–O bond cleavage at the Brønsted acid site on ZSM-5, which leads to the final product hexadecane. This work provides an efficient product-switching strategy in biodiesel synthesis that is enabled by a subtle control over the pathway of key intermediate, which is expected to be applied in the catalytic conversion of biomass resources.
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Device
·
2025
·
IF 8
Engui Wang,Maosheng Wu,Lin Luo,Xi Cui,Lingling Xu,Ruizeng Luo,Yang Zou,Tian Le,Yizhu Shan,Yichang Quan,Yuan Bai,Li Wu,Yiran Hu,Sijing Cheng,Juwei Yang,Chang Zhu,Dengjie Yu,Jianying Ji,Yongfang Ren,Dongjie Jiang,Bojing Shi,Hongqing Feng,Wei Hua,Zhou Li,Han Ouyang
Biodegradable electronics dissolve in vivo , eliminating retention risks, but they are often not self-contained due to limited energy storage, relying on tethered or wireless power. Here, we report a biodegradable flexible supercapacitor (BFSC) that can be completely dissolved to achieve symbiosis with the body and modulate neural excitation and inhibition without external energy. Its low stiffness and favorable biocompatibility allow it to minimize interface mismatch and rejection to be integrated with the body like a biological tissue. The BFSC has a farad surface capacitance (0.36 F/cm 2 ), high energy density (73.1 μWh/cm 2 ), and 1-month operating life in vivo due to the MXene nanolayered electrode and solid-state hydrogel electrolyte. The BFSC can drive bioelectric stimulation circuits to enable neuromodulation and cardiac pacing in rats and pigs. The scaffold-like BFSC almost completely inhibits neural activity. These advances are expected to facilitate the development of self-contained biodegradable and symbiotic bioelectronics.
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PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
·
2025
·Vol. 122
·期 5
·e2417043122
·
IF 9.1
Danlong Li,Rogerio Manica,Zhixiang Chen,Shuo Wang,Qingxia Liu,Haijun Zhang
Bubbles present in saline water typically exhibit a prolonged lifetime, making them attractive for various engineering processes. Herein, we unveil a transition from delayed bubble coalescence to rapid bursting within about one millisecond in salty solutions. The key aspect in understanding this transition lies in the combined influences of surface deformation and ion surface excess instead of characterizing the ions alone. Only with a sufficiently deformed region trapped between the colliding bubble and fluid surfaces can the coalescence inhibition effect be maintained to cause the bouncing behavior. Thus, we quantify a consistent upper limit of ion transfer content required for instant coalescence under different salty conditions. Furthermore, we present numerical ranges associated with different bubble behaviors in terms of Eo, Re, and We and determine the critical values to predict bubble dynamics. Our findings shed light on the bubble coalescence principle in saline water and allow access to the regulation of coalescence time based on the requirement of technological applications.
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PHYSICA B-CONDENSED MATTER
·
2025
·
IF 2.8
Xiaobo Wang,Congmian Zhen,Jiaxuan Feng,Xiaoxu Zhang,Lu Liu,Li Ma,Guoke Li,Dewei Zhao,Denglu Hou
Pure phase Ni-doped Co 3 O 4 nanoparticles (Ni x Co 3-x O 4 , 0≤x ≤ 1) were prepared using a hydrothermal method . At low doping concentrations, Ni preferentially enters the octahedral sites to replace the non-magnetic Co 3+ , and a new superexchange interaction is created between tetrahedral Co 2+ and octahedral Ni 3+ . A spin glass state was observed. The magnetic transition temperature of the Ni x Co 3-x O 4 powders significantly increases from 36 K to 236 K, and the saturation magnetization increases to 2.239 μ B /f.u. As the Ni content continues to increase, and Ni ions unexpectedly enter tetrahedral sites and new superexchange interactions are emerged. However, the superexchange interaction between tetrahedral Ni 2+ and octahedral Ni 3+ is weaker than that between tetrahedral Co 2+ and octahedral Ni 3+ . Meanwhile, tetrahedral Ni 2+ makes octahedral Co 3+ transform from low spin to high spin, resulting in a decrease in the total magnetization of the sample.
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Science China-Technological Sciences
·
2022
·Vol. 65
·期 8
·1772-1779
·
IF 3.903
Li Cong,Tan Dan,Luo Cheng,Luo JunHui,Cao Ke,Yang Li,Zhou YiChun
Toughness enhancement of zirconium tantalum ceramics is conducive to the new generation of thermal barrier coatings (TBCs). The phase transformation toughening mechanism of zirconium tantalum ceramics has been explored through the Vickers indentation of YTaO 4 ceramic block, the phase transformation region is found near the indentation and the microcrack tip. The increased energy of stable phase Δ E M−M′ >0, and the volume expanded Δ V ≈1.9%, so, the phase transformation is a process of energy absorption. The additional stress α a restraining the crack propagation was generated in the shielding area at the crack tip. In addition, combined with the toughening of ferroelastic domains switch, the traditional microcrack toughening, and crack propagation toughening, we summarized the toughening mechanism of YTaO 4 ceramics with the increasing external load, which is followed by ferroelastic toughening, phase transformation, microcrack, and crack propagation. For the perspective of toughening, we found that Z 4+ doping in YTaO 4 ceramics could broaden the phase transformation range in phase transformation toughening, significantly improve the toughness and reduce the generation of cracks in microcrack toughening and crack propagation toughening. Therefore, toughening mechanism of zirconium tantalum ceramics has important guiding significance for the service of TBCs.
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INORGANIC CHEMISTRY
·
2023
·
IF 4.6
Xia Yang,Wenbin Zhang,Xueting Pan,Xueling Hou,Shujuan Han
Borophosphates have become promising candidates for ultraviolet or deep-ultraviolet functional crystals. Through high-temperature solution method, four new borophosphates, K2B2P2O9, (NH4)2BP2O7(OH), K2BP2O7(OH), and P21/c-(NH4)2B2P3O11(OH), were acquired successfully. Single crystal X-ray diffraction suggests that K2B2P2O9, (NH4)2BP2O7(OH), and K2BP2O7(OH) belong to the noncentrosymmetric space group, while P21/c-(NH4)2B2P3O11(OH) belongs to the centrosymmetric compound. It is worth mentioning that K2B2P2O9, (NH4)2BP2O7(OH), and K2BP2O7(OH) present the new fundamental building blocks [B2P2O11], [BP2O10H], and [BP2O9(OH)], respectively, as far as we know. Compared with K2B2P2O9, (NH4)2BP2O7(OH), K2BP2O7(OH), and P21/c-(NH4)2B2P3O11(OH) exhibit a larger optical anisotropy, further confirming the positive effect of hydroxyl groups on birefringence. UV–vis–NIR diffuse reflectance spectra display that K2B2P2O9 and (NH4)2BP2O7(OH) have short UV cutoff edges. Meanwhile, theoretical calculations were conducted to comprehend their optical properties and electronic structures.
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BIOLOGY BULLETIN
·
2026
·Vol. 52
·期 11
·310
·
IF 0.5
Vilkov E. V.
The current decline in the number of waterfowl and semi-aquatic birds on a global scale is largely due to the reduction in the area of wetlands in the era of global warming. Using the example of transboundary populations of seagulls (order Charadriiformes, family Laridae), the data from long-term monitoring conducted in 1995–2020 in two key ornithological areas of international importance in Russia is presented: the Sulakskaya and Turalinskaya lagoons (Republic of Dagestan). The lagoons are located on one of the largest Western Caspian migratory route in Russia, which is arranged as a “bottleneck” where the flight paths of European and Asian migrants, which are part of the Black Sea-Mediterranean and West Siberian-East African flyways, are as close as possible. The Laridae model group, which includes 12 background taxa, was selected based on the regularity of their encounters during migration. Based on ring recovery data obtained from the Bird Ringing Center IEE RAS, the geographic dispersion of gull populations regularly migrating through the study areas was determined and the contour of their generalized flyway was designated. The share of each taxon was determined from the sum of all encountered individuals and the “core” of the species leading in numbers was identified. Correlation analysis showed that out of 12 gull taxa, 4 showed a significant increase in numbers, 3—decreased, and 5—remained at the same level. The obtained population trends were synchronized with the data from literary sources for the same species populations of Laridae, but in their nesting sites. The coincidence of the abundance trends obtained in the lagoons with the abundance trends of the same species/populations, but in their nesting sites, confirms the correctness of our assessment of the current state of the tested gull populations. Global warming affected the change in the timing of migration in 5 model taxa, while 5 species of gulls changed their migration routes in the Caspian region, changing their wintering range from African to Indian. A correlation between the abundance and intensity of Laridae migration with the average annual air temperature in the Caspian Lowland of Dagestan was found. It was shown that in warm years, the intensity of autumn migration and the abundance of gulls decreases, and in cold years it increases, while the population size themselves remains unchanged. Correlation analysis showed a reliable positive relationship between the increase in the number of common Caspian sprat, as one of the priority food items, with the increase in the number of 4 studied taxa. Correlation analysis also revealed a reliable link between the increase in the number of Laridae wintering in the study area and the regression of the Caspian Sea, in which shallow areas of the sea area improved the access of gulls to food resources (fish, benthos). Three key environmental factors that determine the dynamics of Laridae populations are discussed: hydroclimatic cycles, anthropogenic impact and foraging. The data obtained can serve as a basis for creating a Russian Laridae monitoring database with its subsequent integration with Eurasian databases. In order to preserve the biodiversity of the Turalinskaya Lagoon, including Laridae, it is recommended to create a regional protected area “Turalinskaya Lagoon.”
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CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2026
·
IF 3.5
Qingmao Yang,Anyan He,Junyan Tan,Weichen Zhao,Haoyi Wu,Shengning Luan,Wei Feng,Chun Shen
Developing a novel EPCS combining GOase with Au/TiO 2 . • Achieving ∼92.3% DFF yield with ∼97.0% selectivity within 2 h in pure water. • The by-product H 2 O 2 is in-situ decomposed into O 2 by Au/TiO 2 . • •OH, •O 2 – and O 2 precisely required for GOase activation generated by Au/TiO 2 . 2,5-Diformylfuran (DFF), as the oxidation product of the biomass platform molecule 5-hydroxymethylfurfural (HMF), has attracted considerable attention because of its broad utility as a precursor for pharmaceuticals, renewable polymers, and other functional products. Efficient oxidation of HMF into DFF through biocatalysis in pure water is extremely desirable but still faces significant challenges: complex multi-enzyme systems and low reaction efficiency. Herein, we develop a novel enzyme-photo-coupled catalytic system (EPCS) combining GOase with Au/TiO 2 photocatalyst, achieving “waste-to-wealth”. The mechanism study reveals that the Au/TiO 2 acts as the role of “killing two birds with one stone”: in-situ decomposing inhibitory H 2 O 2 by-product into O 2 and H 2 O, thereby mitigating enzyme inhibition; and ingeniously generating reactive oxygen species (ROS) (hydroxyl radicals (·OH) and superoxide radicals ( )) and regenerative O 2 that precisely are required for GOase activation. Under visible light conditions, the EPCS achieves (92.3±1.4)% DFF yield with (97.0±0.8)% selectivity within 2 h, significantly outperforming the single enzyme system (DFF yield: (40.9±2.4)%). The “green chemistry” concept is implemented in the EPCS, which provides a generalizable strategy for developing efficient, green, and concise oxidation systems by turning a toxic by-product into catalytic promoters. Download: Download high-res image (335KB) Download: Download full-size image
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JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2020
·
IF 4.192
Niu Zhang,Jun-Peng Zeng,Yan-Ping Wu,Meng Wei,Hong Zhang,Liufeng Zheng,Ze-Yuan Deng,Jing Li
The digestion and absorption of different structural lipids in human milk may be different. Hence, by simulating in vitro infant digestion and Caco-2 cells to explore the effects of 1-oleoyl-2-palmitoyl-3-linoleoylglycerol (OPL)/1,3-dilinoleoyl-2-palmitoylglycerol (LPL)/1,3-dioleoyl-2-palmitoylglycerol (OPO) and their mixtures (M) (OPL/LPL/OPO in M1, M2, and M3 were 1.5/0.5/1, 1.2/1.2/1, and 0.5/0.2/1, respectively) on digestion and absorption. The digestibility of the OPO group was higher than those of the OPL and LPL groups, and the M3 group was higher than the M1 and M2 groups. The synthesis and transport of triglycerides in Caco-2 cells in OPL and LPL groups were higher than the OPO group, and the M1 group was significantly higher than that of M3. The expression of FABP1, PPARα, and MTT protein in OPL and M1 groups was significantly higher than OPO and M3, respectively. There are differences in the digestion and absorption of differently structured lipids from this study.
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Environmental Science-Water Research & Technology
·
2023
·Vol. 9
·期 5
·1480-1490
·
IF 5
Yalan Liu,Hui Zhang,Yang Ding,Nan Hu,Dexin Ding
Dissolved uranium in groundwater contaminated by acid in situ leaching poses a serious threat to human health and the ecosystem due to its toxicological properties. In this article, carboxy methyl cellulose (CMC) with high dispersity was used to stabilize nano zero-valent iron (nZVI), and highly dispersed CMC-stabilized nZVI (CMC-nZVI) was synthesized by a liquid-phase reduction method, characterized by multiple analysis techniques, and tested for its dispersal and antioxidizing properties. Compared with nZVI, CMC-nZVI showed great dispersal and resistance to oxidation. The effects of oxygen, pH, dosage, initial U(VI) concentration and HA concentration on U(VI) elimination by CMC-nZVI, and the U(VI) removal kinetics and mechanism were investigated. The removal capacity of U(VI) by CMC-nZVI was 400 mg g−1 at pH 3.0, and the dose of 0.1 g L−1 showed excellent uranium removal efficiency under acid conditions. Moreover, CMC-nZVI was used to treat groundwater from an area after acid in situ leach uranium mining, and CMC-nZVI was found to be capable of decreasing the concentration of uranium in the acidic groundwater (pH < 3) from 0.321 to 0.001 mg L−1. The results indicate that CMC-nZVI has potential application prospects in the in situ remediation of groundwater in areas after acid in situ leach uranium mining.
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SCIENCE OF THE TOTAL ENVIRONMENT
·
2024
·
IF 8.2
Xin Jiang,Kaiwei Li,Yimin Tang,Xiuwen Wang,Wei Kan,Libin Yang,Bing Zhao
High-performance flexible semiconductor material can be used as an excellent multifunctional matrix for in-situ ultrasensitive surface-enhanced Raman scattering (SERS) detection and synchronous photocatalytic degradation of antibiotic residues in aquatic ecosystem. Here, a calcium-doped TiO 2 flexible matrix with double defects (surface oxygen vacancy defect and Ti 3+ energy level defect) was developed by its “in-situ one-step” hydrothermal synthesis on cotton fabric for the above purposes. Due to the joint contribution of double defects, a multi-channel charge transfer mode and a high-efficiency carrier separation are achieved, which endows flexible cotton fabric/Ca-doped TiO 2 (Cot/Ca-TiO 2 ) substrate with the greatly boosted SERS effect for in-situ detection of antibiotic residues on fish body surface and in fishpond water by a simple wiping or dipping sampling method, even for simultaneous identification of multi-component residues. The detection limits of three antibiotic residues (enrofloxacin, ciprofloxacin and enoxacin) are as low as 10 −9 M, which are far lower than the EU standard. More meaningfully, the flexible Cot/Ca-TiO 2 can be used as a multifunctional filter-membrane type photocatalyst for efficient on-site degradation of antibiotic residues in flowing fishpond water by a multi-grade photocatalysis means. Moreover, the flexible matrix exhibits good recyclability in both actual detection and photocatalysis.
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Brain Sciences
·
2025
·Vol. 15
·期 3
·236
·
IF 2.8
Xiaolin Fan,Hong Wang,Xiaoqiang Lv,Qi Wang,Boya Yu,Xiao Li,Liang Li,Yuhao Zhang,Ning Ma,Qing Lu,Airong Qian,Junhong Gao
Background: Blast traumatic brain injury (bTBI) can result in depression-like behaviors in the acute and chronic phases. SSRIs have been shown to significantly alleviate depression-like behaviors in animal models of traumatic brain injury (TBI) by increasing serotonin (5-HT) and brain-derived neurotrophic factor (BDNF) in the hippocampus. However, the therapeutic effects of SSRIs on depression caused by bTBI remain unclear. Objective: Therefore, this study was aimed at investigating the therapeutic effects of SSRIs on depression-like behaviors in bTBI models. Methods: We created a rat model to study mild TBI by subjecting rats to increased blast overpressures (BOP) and injecting fluoxetine and escitalopram SSRIs intraperitoneally for 28 days. Results: On day 14 post-BOP exposure, rats treated with SSRIs showed decreased depression-like behaviors. This finding was accompanied by higher 5-HT levels in the hippocampus and increased numbers of Nestin-positive cells in the dentate gyrus. Furthermore, rats treated with SSRIs exhibited increased pCREB and BDNF protein expression in the hippocampus on days 7, 14, and 28 after bTBI. Conclusions: Overall, our findings indicate that SSRI-induced recovery from depression-like behaviors after mild bTBI is associated with the upregulation of 5-HT levels, pCREB and BDNF expression, and neurogenesis in the hippocampus.
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