JOURNAL OF NANOPARTICLE RESEARCH
·
2020
·Vol. 22
·期 2
·1-12
·
IF 2.132
Sun Xueying,Li Siqi,Liu Rongmei,Sun Xiulun,Liu Xinjie,Li Anran,Li Wen
In this work, we designed a simple hydrothermal synthetic method for a ZnCo-PBA@α-Co(OH) 2 nanosphere@nanosheet material with good electrochemical properties. The obtained material had a specific capacitance of 423.92 F g −1 at 1 A g −1 and a cycling retention ratio of 78.48% after 1000 cycles at 5 A g −1 . A hybrid supercapacitor device (ZnCo-PBA@α-Co(OH) 2 //AC) assembled with activated carbon as the negative electrode had a specific capacitance of 122.4 F g −1 at 1 A g −1 , a cycling retention rate of 73.53% after 5000 cycles at 5 A g −1 , and a very high energy density of 49.13 Wh kg −1 at power density of 1734.0 W kg −1 . The significantly improved electrochemical performance of the ZnCo-PBA@α-Co(OH) 2 nanocomposites can be attributed to the positive synergistic effects of the porous structure of the PBA material and the large specific surface area of the α-Co(OH) 2 nanosheets, on the ion permeability and number of active sites in the reinforcing material; thus, this composite is a potential material for use in future energy storage systems.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2025
·
IF 6.2
Zhuangzhuang Huang,Junru Zhou,Jialing Wang,Sheng Xu,Cheng Cheng,Jiangfeng Ma,Zhen Gao
The industrial applications of enzymes are limited due to the activity-stability trade-off, which implies that the improvement of thermostability often accompanies decreased activity. This study presents a dual-strategy approach to simultaneously improve the catalytic efficiency and thermostability of α-galactosidase galV from Anoxybacillus vitaminiphilus WMF1. Our integrated method combines computational analysis with enzyme property prediction to selectively target and modify the catalytic region and residues that are distant from the active site. We identified and experimentally validated mutations that improve activity without compromising stability and further increased thermostability through additional distant-site mutations. The resulting mutant enzyme variant N549Q/T550N/Y634F demonstrated a 6.2-fold increase in catalytic efficiency and a 3.2-fold improvement in the half-life at 65 °C. Molecular dynamics (MD) simulations supported the structural basis for the observed enhancements. This approach offers a refined strategy for engineering α-galactosidases with improved industrial applicability, overcoming the traditional trade-offs between enzyme activity and stability. Hydrolytic activity toward raffinose family oligosaccharides (RFOs) was validated using soymilk as a model substrate, demonstrating significant practical potential.
研究领域:
生物化学
·
酶工程
·
计算生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
AICHE JOURNAL
·
2025
·
IF 4
Xueqi Shi,Kai Liu,Na Wang,Qiuyan Ding,Zhenyu Zhao,Hong Li,Xin Gao
The actual applications of extraction methods for α -olefins separation are limited by their long time and high energy consumption. Hence, this study employs microwave technology to intensify the extraction process using Ag-based ionic liquid (Ag-IL), where the influence of microwave irradiation and the mechanism of microwave-assisted ionic liquid extraction (MAILE) are investigated, along with a comprehensive techno-economic analysis of process feasibility. The results of COSMO-RS and DFT simulations demonstrate the dominant role of π-complexation in identifying Ag-IL with high selectivity, indicating the possible enhancement caused by microwave irradiation. The subsequent kinetic experiments show that compared with conventional routes, the MAILE accelerated the extraction process by approximately 89.72%. As a result, the total annual cost of unit product of the overall process is reduced by 6.43% according to techno-economic analysis by Aspen Plus, indicating that MAILE is a cost-effective, scalable, and sustainable approach to α -olefin separation, offering process efficiency and environmental sustainability.
研究领域:
化学工程
·
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Chunlin Wen,Zhenhua Tang,Tingsu Liu,Fan Qiu,Yan-Ping Jiang,Xin-Gui Tang,Yi-Chun Zhou,Xiangjun Xing,Ju Gao
Recently, Ga 2 O 3 -based devices with a wide bandgap have gained great attention in power semiconductor devices. However, Ga 2 O 3 -based devices with the substable crystalline phase and high performances need be further developed and discussed. In this work, the α-Ga 2 O 3 thin films and GQDs/α-Ga 2 O 3 heterojunctions were prepared by magnetron sputtering on the transparent FTO substrates with a buffer TiO 2 layer. And, the good self-powered deep-ultraviolet photodetection performance and mechanisms were discussed in the GQDs/α-Ga 2 O 3 /α-TiO 2 /FTO devices: its responsivity to 254 nm UV light can reach 1.72 mA/W at a bias voltage of 0 V, a normalized detection rate of 1.7 × 10 10 Jones and the light-to-dark current ratio (PDCR) of ∼1 were achieved due to the change of heterojunction energy band type from II to I. Moreover, the good self-powered deep UV photodetection for GQDs/α-Ga 2 O 3 /α-TiO 2 /FTO devices were demonstrated: a PDCR of 1.1 × 10 3 , a self-powered responsivity (R) improved by a factor of 5 to 8.7 mA/W, the rise time (τ r )/fall time (τ f ) of 86/39 ms, and a normalized detectivity (D*) with an improved magnitude of 1.3 to 2.3 × 10 11 Jones were achieved by constructing GQDs/α-Ga 2 O 3 heterojunctions on the outer surface of α-Ga 2 O 3 thin film. These results can provide a reference for the future development of Ga 2 O 3 thin film devices.
研究领域:
材料科学
·
光电子学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CATALYSIS
·
2025
·
IF 6.5
Huacheng Ying,Zeyu Wen,Jia Yao,Mowei Zhou,Yongtao Wang,Haoran Li
Constructing N−O bond in amines via aerobic oxidation is of high interest for producing cyclohexanone oxime; however, the mechanism remains disputed. Concerning TiO 2 /NHPI co-catalyzed aerobic oxidation of cyclohexylamine, here a convincing mechanism involving α-C radical and oxaziridine as key intermediates is demonstrated. All the evidences from electron paramagnetic resonance, mass spectrometry, and product analysis with methylated substrates lead to the same story about the mechanism, where both radical translocation of cyclohexylamino radical and epoxidation of 1-hydroperoxycyclohexylamine are mediated by double proton transfer and are the key to convert amine into oxime. Near IR analysis indicate that surface hydroxyl groups on TiO 2 facilitate the double proton transfer process. Here the unveiled role of surface hydroxyl on TiO 2 highlights its potential for broader applications in amine activation. Additionally, the well-established radical mechanism provides valuable insight into the construction of N−O bonds in amines.
研究领域:
化学
·
催化反应
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Zhiwei Xia,Yuhan Wang,Rujun Yang,Mengdi Xu,Cunjian Lin,Zhongyuan Li,Ying Lv,Xiaopeng Chi,Shihai You
The interstitial site engineering that purposely creates interstitial luminescent centers in suitable hosts has become an intriguing strategy in designing novel inorganic phosphors. However, effectively tuning the photoluminescence of interstitial activators remains tough challenging at this stage. Here, we demonstrate the effective modulation of interstitial luminescence in inorganic phosphor. In detail, the blue emission band ( λ em = 446 nm) of interstitial Eu 2+ doped α -cristobalite (SiO 2 :Eu 2+ ) is largely enhanced and broadened via a partial, aliovalent substitution of Si 4+ by Al 3+ . After introducing Al 3+ ions into SiO 2 lattice, the full width at half maximum of the blue emission band increase from 59 to 76 nm with a triple growth in quantum efficiency (10.82% → 35.56%). Moreover, the thermal stability improves significantly with a high emission retention of 60% at 325 °C (SiO 2 :0.06Al 3+ ,0.005Eu 2+ ), far higher than that of the parent SiO 2 :0.005Eu 2+ (30%). Encapsulating blue-emitting SiO 2 :Al 3+ ,Eu 2+ along with two commercial green and red phosphors on an ultraviolet LED chip ( λ em = 375 nm), a white LED device with high color rendering index (Ra > 90) was successful fabricated, showing the great potential of this phosphor for achieving high-quality white LED lighting. This study not only provides a promising bule emitter but also sheds light on modulating interstitial luminescence properties in inorganic phosphors.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
·
2018
·Vol. 27
·期 4
·1927-1935
·
IF 1.34
Zhang Xiaosheng,Xu Hong,Dong Jinxiang
Nickel-ion-exchanged α -zirconium phosphate (Ni- α -ZrP) was synthesized by a mild hydrothermal synthesis method. Different raw material ratios (NaF/H 3 PO 4 /Ni(CH 3 COO) 2 ·4H 2 O) influence the particle size of the Ni- α -ZrP samples. The grain size could be controlled and distributed from 20 to 600 nm. Ni- α -ZrP was evaluated as an additive in lithium grease in a four-ball test. A 3.0 wt.% addition of Ni- α -ZrP to lithium grease yielded maximum non-seizure load values of 1235 N, and the wear scar diameter on the lower balls is 0.42 mm at 294 N. Compared with smaller particles, the addition of Ni- α -ZrP with a larger particle size to grease yields a better load-carrying capacity.
研究领域:
材料科学
·
化学工程
·
机械工程
✓ 已验证
DOI
高影响因子
FOOD HYDROCOLLOIDS
·
2025
·
IF 12.4
Yutong Jiang,Xin Wen,Jiahui Guo,Hongyu Li,Zhanmei Jiang,Yun Chen
This study investigated how tea saponin (Ts), gypenoside (Gyp), mogroside V(Mog), glycyrrhizic acid (GA) and stevioside (STE) affected the heat-induced aggregates of α-lactalbumin (Ala), focusing on inhibition mechanisms of disulfide cross-linking and their impact on structural and physicochemical properties. SDS-PAGE and size exclusion chromatography (SEC) confirmed that saponins probably bound Ala monomers via hydrophobic forces and hydrogen bonds, inhibiting the formation of disulfide bonds in heat-induced Ala (H-Ala) and effectively decreasing polymer generation, with the inhibitory effect in the order of Gyp, GA, Ts, STE, Mog. LC-MS/MS analysis revealed that Ala (6), Ala (91), Ala (111) and Ala (120) were the most active sites for the disulfide crosslinking reaction in H-Ala. Specifically, the number of intramolecular disulfide cross-linked peptides of heat-induced Ala-Mog, Ala-STE, Ala-GA, Ala-Ts and Ala-Gyp complexes significantly decreased by 5, 6, 7, 8 and 10, respectively, compared with H-Ala. Notably, the heat-induced Ala-Gyp complex exhibited the highest absolute zeta potential, smallest particle size, lowest hydrophobicity, which correlated with its superior inhibition of aggregation. The study highlighted the potential of saponins as natural additives for the stabilization of heat-sensitive proteins during the thermal processing, offering new insights for food industry applications.
研究领域:
食品科学
·
分子生物学
·
生物物理化学
·
蛋白质工程
·
天然产物化学
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2024
·
IF 6.7
Yun-Dong Yin,Lei Yang,Xi-Tong Song,Jun Hu,Fang-Fang Chen,Ming Xu,Zhi-Yuan Gu
The high expression of Spermidine/spermine N1-acetyltransferase (SSAT-1) is an important indicator in early cancer diagnosis. Here, we developed a nanopore-based methodology with γ-cyclodextrin as an adaptor to detect and quantify acetylamantadine, the specific SSAT-1-catalyzed product from amantadine, to accordingly reflect the activity of SSAT-1. We employ γ-cyclodextrin and report that amantadine cannot cause any secondary signals in γ-cyclodextrin-assisted α-HL nanopore, while its acetylation product, acetylamantadine, does. This allows γ-cyclodextrin to practically detect acetylamantadine in the interference of excessive amantadine, superior to the previously reported β-cyclodextrin. The quantification of acetylamantadine was not interfered with even a 50-fold amantadine and displayed no interference in artificial urine sample analysis, which indicates the good feasibility of this nanopore-based methodology in painless cancer prediagnosis. In addition, the discrimination mechanism is also explored by 2-D nuclear magnetic resonance (NMR) and nanopore experiments with a series of adamantane derivatives with different hydrophilic and hydrophobic groups. We found that both the hydrophobic region matching effect and hydrophilic interactions play a synergistic effect in forming a host–guest complex to further generate the characteristic signals, which may provide insights for the subsequent design and study of drug-cyclodextrin complexes.
研究领域:
生物化学
·
医学诊断
·
分子生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Nano
·
2025
·
IF 16
Wei Liu,Anyang Wang,Jihan Zhang,Shixiang Yu,Maolin Wang,Shuheng Tian,Haoyi Tang,Ziwen Zhao,Xiao Ren,Yuzheng Guo,Ding Ma
Constructing subnanometric electrocatalysts is an efficient method to synergistically accelerate H2O dissociation and H+ reduction for pH-universal hydrogen evolution reaction (HER) for industrial water electrolysis to produce green hydrogen. Here, we construct a subnanometric Pt/α-MoC catalyst, where the α-MoC component can dissociate water effectively, with the rapid proton release kinetics of Pt species on Pt/α-MoC to obtain a good HER performance at high current densities in all-pH electrolytes. Quasi-in situ X-ray photoelectron spectroscopy analyses and density functional theory calculations confirm the highly efficient water dissociation capability of α-MoC and the thermodynamically favorable desorption process of hydrolytically dissociated protons on Pt sites at the high current density. Consequently, Pt/α-MoC requires only a low overpotential of 125 mV to achieve a current density of 1000 mA cm–2. Moreover, a Pt/α-MoC-based proton exchange membrane water electrolysis device exhibits a low cell voltage (1.65 V) and promising stability over 300 h with no performance degradation at an industrial-level current density of 1 A cm–2. Notably, even at a current of 100 A, the cell voltage remains low at 2.15 V, demonstrating Pt/α-MoC’s promising potential as a scalable alternative for industrial hydrogen production. These findings elucidate the synergistic mechanism of α-MoC and atomically dispersed Pt in promoting efficient HER, offering valuable guidance for the design of electrocatalysts in high current density hydrogen.
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
DIAMOND AND RELATED MATERIALS
·
2022
·
IF 3.806
Jiwei Xie,Guijing Liu,Jia Sun,Rundou Zheng,Wenwen Zhao,Tongtong Chu,He Lin,Yanbin Xu,Shanmin Gao,Zhuyin Sui
MnO 2 as the cathode material of Zinc-ion batteries (ZIBs) has attracted great attention. In order to further improve the performance of ZIBs, MnO 2 hollow nanorobs and carbon nanotubes (CNTs) are compounded to obtain α-MnO 2 /CNTs nanocomposites in which robs and tubes are entangled with each other and present the cross-linked reticular structure. This structure of α-MnO 2 /CNTs electrode is obtained through hydrothermal strategy and provides large space for the volume variation of MnO 2 during the charge and discharge process. The α-MnO 2 /CNTs composite displays an excellent initial discharge capacity of 302 mAh·g −1 at 100 mA·g −1 , and keeps 116 mAh·g −1 at 2000 mA·g −1 (78.4% retention after 2000 cycles). This composite provides a new way for the further application of ZIBs.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Scientific Reports
·
2015
·Vol. 5
·期 1
·1-7
·
IF 5.578
Li Xiaodong,Wang Zhi,Zhang Zemin,Chen Lulu,Cheng Jianli,Ni Wei,Wang Bin,Xie Erqing
The photoelectrochemical (PEC) water splitting is hampered by strong bonds of H 2 O molecules and low ionic conductivity of pure water. The photocatalysts dispersed in pure water can serve as a water activation agent, which provides an alternative pathway to overcome such limitations. Here we report that the light illuminated α−Fe 2 O 3 /Pt nanoparticles may produce a reservoir of reactive intermediates including H 2 O 2 , ·OH, OH − and H + capable of promoting the pure water reduction/oxidation half−reactions at cathode and highly photocatalytic−active TiO 2 /In 2 S 3 /AgInS 2 photoanode, respectively. Remarkable photocurrent enhancement has been obtained with α−Fe 2 O 3 /Pt as water activation agent. The use of α−Fe 2 O 3 /Pt to promote the reactivity of pure water represents a new paradigm for reproducible hydrogen fuel provision by PEC water splitting, allowing efficient splitting of pure water without adding of corrosive chemicals or sacrificial agent.
研究领域:
材料科学
·
能源科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）