Food Bioscience
·
2025
·
IF 5.9
Chenxi Gu,Liyan Yang,Susu Han,Dengfeng Yang,Xiaodong Xu,WenChao Zhang,Mingguo Jiang,Lixia Pan
Cold-active chitinases that maintain robust catalytic performance at low temperatures are gaining attention as eco-friendly biocatalysts for energy-saving bioprocesses. In this study, a novel multifunctional chitinase of GH18 ( Cm Chi18B) was successfully cloned from a newly identified mangrove-associated bacterium Chitinibacter mangrovi FCG-7 T in Escherichia coli . The enzyme Cm Chi18B demonstrated adaptability to cold environments, retaining 55% of its maximal activity at 0°C. It displayed optimal activity at 55°C and pH 5.5. Cm Chi18B demonstrated high activity across a broad pH range of 4.0-12.0. Substrate hydrolysis analysis indicated that Cm Chi18B possesses bi-functional capabilities, including exochitinase and N-acetyl-β-D-glucosaminidase activities. After 24 h of incubation with colloidal chitin at 30°C, the enzyme achieved a N-acetyl-D-glucosamine (GlcNAc) conversion rate of 91.15% with a purity exceeding 98%. Intriguingly, the hydrolysis time for GlcNAc production varied with temperatures, with 0°C significantly impairing N-acetyl-β-glucosaminidase activity. These attributes position Cm Chi18B as a promising, low-energy biocatalyst for the sustainable production of GlcNAc and the valorization of chitin waste streams.
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高影响因子
JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY
·
2018
·Vol. 29
·期 7
·1455-1463
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IF 1.444
Yang Aihong,Zhang Shun,Zhang Lei,Zhong Jingjing,Kou Xiaodi
Both Shuang-Huang-Lian and Xue-Bi-Jing injections are clinically proven efficient and low cost medicines. However, the studies of their chromatographic separation are limited. In this study, a column based on ionic liquid stationary phase was applied for the first time for the analysis of these two injections. For Shuang-Huang-Lian injection, U-shaped plots of retention factors vs. mobile phase constitutions were obtained. This unique kind of separation behavior allowed a flexible adjustment of retention by tuning the mobile phase constituents. Then acids group was analyzed with hydrophilic chromatography mode, while glycosides group was analyzed with reversed phase chromatography mode. Similarly, constituents in Xue-Bi-Jing injection were analyzed with mixed mode high performance liquid chromatography (HPLC). Higher, medium and lower polarity groups were analyzed with hydrophilic interaction, reversed phase and normal phase liquid chromatography modes, respectively. Results from this work provided valuable information for the separation of complicated systems such as traditional Chinese medicine injections.
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高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2021
·
IF 4.759
Tianpei Cai,Yanqiang Zhou,Huachun Liu,Jianmin Li,Xiaoxiao Wang,Shanwen Zhao,Bolin Gong
Monodisperse restricted-access media bi-functional monomers with molecularly imprinted polymers (RAM-MIPs) were constructed using surface-initiated atom transfer radical polymerization. They were used as solid-phase extraction (SPE) adsorbents to enrich sarafloxacin (SAR) residues from egg samples, and influences on their performance were investigated. Optimum synthesis of RAM-MIPs was achieved by combining a bi-functional monomer (4-vinylpyridine-co-methacrylic acid, 1:3) with an 8:1:32:8 ratio of a template molecule, cross-linker, and restricted-access functional monomer. The SAR imprinting factor of RAM-MIPs was 6.05 and the selectivity coefficient between SAR and other fluoroquinolones was 1.86–2.64. Compared with traditional MIPs, the RAM-MIPs showed better SAR enrichment and selectivity during extraction of a complex protein-containing solution. Empty SPE cartridges were filled with RAM-MIP microspheres as SPE adsorbents. The limit of quantitation for SAR was 4.23 ng g −1 (signal-to-noise ratio = 10) and the mean SAR recovery from spiked egg samples was 94.0–101.3%. Intra-day and inter-day relative standard deviations were 1.1–9% and 1.5–3.3%, respectively.
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高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2022
·Vol. 24
·期 45
·27812-27818
·
IF 3.945
Juan Li,Fei Jia,Kai Han,Bing Sun,Lianzhen Cao,Yingde Li,Shuai Zhang
Experimental results show an intriguing phenomenon that although Bi and Sb have the same number of valence electrons, Bi/Sb substitution increases the electron concentration of n-type Mg3Sb2-based materials. Using a combination of theoretical calculations and experimental synthesis, this work reveals the physical mechanism of the effect of Bi doping on carrier concentration. The increase in electron concentration mainly originates from the enhanced degree of ionization of donor impurity because of the decrease of conductivity effective mass and increase of dielectric constant caused by the narrowing of bandgap with Bi doping. Based on the collaborative optimization of the electrical and thermal transports, n-type Mg3.175Mn0.025Sb1.48Bi0.48Te0.04 exhibits the best thermoelectric performance with a peak zT of 1.85 at 725 K and an average zT of 1.21. This work demonstrates an effective strategy of bandgap engineering for the optimization of carrier concentration and provides insightful guidance for designing other thermoelectric materials.
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高影响因子
Materials Today Physics
·
2025
·
IF 9.7
Jisheng Liang,Qi Zhou,Zhengniu Pan,Zhongwei Zhang,Fengting Mao,Shiyuan Zhao,Sijing Zhu,Jun-liang Chen,Jie Gao,Lei Miao
N-type Mg 3 (Sb,Bi) 2 Zintl compounds have emerged as promising candidates for high-temperature energy applications due to their exceptional thermoelectric performance, making them pivotal in the development of sustainable energy technologies. Despite recent advancements, these materials suffer from low carrier mobility caused by polar covalent bonds , which degrade electrical conductivity and overall thermoelectric efficiency. In this study, we introduce beryllium , a bivalent homologous group element, as a cationic dopant to substitute for Mg in Mg 3.2 Sb 1.5 Bi 0.49 Te 0.01 . This substitution weakens the polarity of the chemical bonds, significantly enhancing carrier mobility from ∼62 to ∼138 cm 2 V −1 s −1 . Theoretical analysis using the single parabolic band model confirms that the effective mass decreases with increasing Be doping content. First-principles calculations further reveal that Be doping leads to stronger charge localization due to their higher electronegativity and shifts the Fermi level into the conduction band and narrows the band gap, strengthening the n-type semiconducting properties. This optimization yields an impressive power factor of ∼2022 μW m −1 K −2 at 523 K in Mg 3.12 Be 0.08 Sb 1.5 Bi 0.49 Te 0.01 , owing to the improved carrier mobility . Furthermore, the Be atoms as point defects induces significant lattice distortions and strains, effectively suppressing lattice thermal conductivity to ∼0.38 W m −1 K −1 at 573 K. Consequently, we achieve a remarkable ZT of 1.54 at 673 K and a high average ZT of 1.17 in n-type Mg 3.14 Be 0.06 Sb 1.5 Bi 0.49 Te 0.01 . Our work offers new strategies to enhance the thermoelectric properties of n-type Mg 3 (Sb,Bi) 2 materials, advancing high-temperature sustainable energy technologies.
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高影响因子
KEY ENGINEERING MATERIALS
·
2014
·
IF 0
Xin Feng Zhu,Jue Feng,Jun Wu Zhu,Bin Li,Qin Xu
Simultaneous determination of Pb2+ and Co2+ without separation has been successfully achieved by a bicolor quantumn dots mixture. This method takes advantage of the different degrees of the fluorescence quenching effects of Pb2+ and Co2+ to the bio-color quantum dots. Chemometrical approaches were applied to assist the discrimination and detection process. The construction of the multivariate calibration models, based on partial least squares (PLS), orthogonal projections to latent structures least squares (O-PLS) and kenel based orthogonal projections to latent structures (K-OPLS), allowed the simultaneous determination of Pb2+ (in the concentration range of 0-120 mM) and Co2+ (0-300 mM). The optimal number of factors in PLS and the optimal number of orthogonal components in O-PLS and K-OPLS were carefully selected. A comparison of prediction performances between these results was performed by relative prediction errors, square of the correlation coefficient and root mean squares error of prediction.
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CATALYSIS LETTERS
·
2022
·Vol. 153
·期 10
·2927-2935
·
IF 2.936
Ri Chol-Nam,Hwang Kuk-Jin,Kim Tu-Nam,Ro Yong-Hak,Ri Jong-Su
Herein, a novel ternary Bi/Bi 2 WO 6 /amorphous Bi 4 V 2 O 11 heterojunction photocatalyst was first synthesized via a facile one-pot solvothermal approach using ethylene glycol as a reaction medium. In this ternary heterojunction system, highly homogeneous-dispersed metal Bi and Bi 2 WO 6 nanoparticles were supported on amorphous Bi 4 V 2 O 11 flakes. Because of the Surface Plasmon Resonance (SPR) efficiency of metal Bi nanoparticles, as-fabricated Bi/Bi 2 WO 6 /amorphous Bi 4 V 2 O 11 heterojunction photocatalyst exhibited a strong light absorbance capacity in the visible-light and near-infrared light range, which can be verified by UV–vis diffuse reflectance spectra measurements. The Bi/Bi 2 WO 6 /amorphous Bi 4 V 2 O 11 heterojunction photocatalyst showed remarkably enhanced photocatalytic activity toward the photoreduction of heavy metal ion Cr(VI) and the photodegradation of MB under visible-light irradiation. The drastically enhanced photocatalytic activity in the ternary Bi/Bi 2 WO 6 /amorphous Bi 4 V 2 O 11 system could be attributed to the SPR effect of metal Bi and the promoted separation and transport efficiency of photo-induced charge carriers stemming from the construction of ternary heterojunction. Moreover, Bi/Bi 2 WO 6 /amorphous Bi 4 V 2 O 11 heterojunctions exhibited a good cycling stability for Cr(VI) reduction after 5 cycles. This study may be supply new insight into the fabrication of highly efficient and stable Bi 4 V 2 O 11 -based photocatalysts, and it is expected to have certain theoretical and experimental value in the design and exploitation of novel heterojunction photocatalyst. Graphical Abstract
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高影响因子
Journal of Materiomics
·
2025
·
IF 9.6
Jiang-Hu Yu,Yu Wang,Chong-Yu Wang,Hao Liang,Yi-Lin Liu,Ze-Yuan Yang,Yi-Xin Zhang,Jing Feng,Zhen-Hua Ge
The extensive utilization of thermoelectric (TE) conversion technology necessitates stricter performance requirements for bismuth telluride (Bi 2 Te 3 )-based commercial materials. Despite the numerous optimization methods available for Bi 2 Te 3 -based materials, each optimization method has a certain upper limitation, and combining multiple strategies can achieve the optimal thermoelectric figure of merit ( zT ). In this study, the thermoelectric properties of (Bi,Sb) 2 Te 3 materials are enhanced through the combined use of the heavy element Pb to regulate carrier concentration and the In element to optimize the band structure. Notably, indium (In) can suppress p-type antisite defects, which generate abundant Te vacancies, and help regulate the carrier concentration to its optimal level. This co-doping strategy achieves optimal carrier concentration, thereby enhancing the power factor (PF=4.57×10 3 μW⸱m –1 ⸱K –2 ), and generating abundant dislocations, the presence of the rich nano-second phase Sb 2 O 3 contributes to reduced lattice thermal conductivity. Consequently, a peak zT value of 1.41 at 323 K and a high average zT value of 1.23 between 300 K and 500 K are achieved. Additionally, two pairs of thermoelectric modules, composed of p-type (Bi 0.42 Sb 1.58 ) 0.994 (In, Pb) 0.006 Te 3 and zone-melted n-type Bi 2 Te 2.7 Se 0.3 , demonstrate a conversion efficiency of 7.3% at a temperature difference of 250 K. This underscores the promising potential of these thermoelectric modules in commercialization. Thus, this study demonstrates the feasibility of combining multiple strategies and is expected to provide a potential reference for other thermoelectric systems.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Xiushuai Guan,Xiaochao Zhang,Changming Zhang,Rui Li,Jianxin Liu,Yunfang Wang,Yawen Wang,Caimei Fan,Zhong Li
Photocatalysis CO 2 reduction into high-value-added chemical feedstocks is desirable for simultaneously addressing the solar energy storage, CO 2 excess and energy shortage issues. In this work, a kind of original S-scheme BiOBr-(0 0 1)/Bi 2 SiO 5 /Bi (OSB) heterostructure photocatalyst with rich oxygen vacancies is in-situ synthesized, which significantly promotes the photocatalytic CO 2 reduction performance. Interestingly, the lower formation energy of oxygen vacancy exhibits the easy feasibility on the BiOBr-(0 0 1) surface via the assistant of ultrasound. There exists the highest photocatalytic CO 2 reduction activity to CO of 234.05 μmol g -1 h −1 for OSB-20 sample (ultrasound time: 20 min), higher 3.3 times than OSB-0 sample (without ultrasound). Combined with experimental and calculated results, the significative formation mechanism, widened light-response range, highly-efficient separation/transfer paths and improved redox-reduction abilities of photogenerated electron-hole pairs for S-scheme OSB-20 heterostructure are investigated and proposed. Our findings provide new insights for the construction and synthesis of the S-scheme Bi-based heterojunction photocatalyst system.
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PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Shan Chen,Yiping Zheng,Shijing Chen,Biao Huang,Xianzhao Tian,Yueqiu Gong
Dielectric capacitors are characterized by high power density, fast charge/discharge rates and long cycle life. However, their practical energy storage applications are severely limited by a high remnant polarization ( P r ) and an intrinsically low breakdown field strength ( E b ) To address these issues, SrTiO 3 /Bi x Ba(1- x )Zr 0.35 Ti 0.65 O 3 /SrTiO 3 (STO/B x BZT/STO) ( x = 0, 0.02, 0.04, 0.06) multilayer ferroelectric films, with SrTiO₃ (STO) as both buffer and capping layers, were fabricated via the sol-gel method. We found that appropriate Bi 3 + doping significantly promoted crystallization and simultaneously induced the formation of defect dipoles, resulting in a dense and uniform microstructure. Meanwhile the bilayer compressive stress from the STO interface layers optimized the domain structure, facilitating a faster response of the polar nanoregions to electric fields. These synergistic effects led to a higher maximum polarization and a lower P r . In particular, the STO/BBZT/STO-0.02 film exhibited excellent overall energy storage performance: under a E b of 4568 kV/cm, it achieved a high recoverable energy storage density ( W rec ) of 41.6 J/cm³ with an energy storage efficiency ( η ) of 71.36%. Notably, after 10 8 cycles of ferroelectric fatigue testing, the variation in W rec was only 8.15%, while maintaining an excellent efficiency ( η = 88.99%). The film also demonstrated good frequency stability (1∼10 kHz) and temperature stability (20∼120 °C). This synergistic optimization strategy holds great promise for providing a new approach to the development of next-generation high-performance dielectric capacitors.
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高影响因子
APPLIED SURFACE SCIENCE
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2026
·
IF 6.6
Qilong Zhang,Yajun Wang,Tursun Abdiryim,Ruxangul Jamal,Feng Xu,Yiming Liu,Jixuan Sun,Guangning Song,Yiwu Zhu
Advancements in wearable electronics have driven demand for flexible, self-powered UV photodetectors, yet the efficient separation and transport of carriers remain critical challenges to realizing their full potential. This study constructs a high-performance flexible self-powered UV detector based on an electrochemically doped Bi-ZnO nanoflowers/PEDOT-CH 2 OH p-n heterojunction, further modified with a Co(IO 3 ) 2 layer. Bi 3+ doping introduces oxygen vacancies to enhance carrier separation, synergizing with the built-in electric field within the heterojunction. The spontaneous polarization of Co(IO 3 ) 2 enhances this electric field, optimizing band alignment and suppressing recombination, while hydroxyl groups in PEDOT-CH 2 OH stabilize the oxygen vacancies. The piezoelectric response of ZnO is not prominent in this device, as its modulating effect is overshadowed by the dominant charge separation mechanism based on doping and interfacial polarization. Through synergistic bandgap engineering, defect control, and interface modification, the optimized device achieves a responsivity of 2.05 mA/W, a specific detection rate of 3.25 × 10 10 Jones, and an ultrafast response time of 54 ms under 365 nm UV illumination. The detector exhibits exceptional flexibility, stability, and selectivity, maintaining high performance through 2500 bending cycles, indicating significant potential for application in flexible, wearable UV sensing.
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2026
·
IF 8.3
Yuanhui Ma,Xi Liu,Minjie Yang,Ling Zha,Ying Huang,Dong Sun,Ruizhuo Ouyang,Yuqin Jiang,Yuqing Miao,Baolin Liu
MicroRNA-21 (miRNA-21) is a key oncogenic biomarker for early cancer diagnosis, yet its ultrasensitive detection in serum remains challenging due to limitations of conventional methods such as low sensitivity, high background, and poor biocompatibility. This study develops an electrochemical biosensor for femtomolar miRNA-21 detection by integrating Y-shaped DNA scaffold-enhanced catalytic hairpin assembly (Y-CHA) and Bi@PtAg nanoclusters (NCs). This design achieved an ultra-low detection limit, approximately 2.8-fold lower than that of the conventional sensor. The Y-CHA strategy spatially confines hairpin probes (H1 and H2) within a Y-DNA scaffold, significantly enhancing signal amplification and hybridization efficiency. Meanwhile, the core-shell structured Bi@PtAg NCs exhibit 2.1-fold higher H₂O₂ reduction catalytic activity than monometallic nanoparticles and demonstrate low cytotoxicity (approximately 80% cell viability at 200 μg·mL⁻¹). The biosensor achieves an ultra-low detection limit of 0.05 fM with a wide linear range from 1 fM to 100 pM (R² = 0.9982). It also displays excellent specificity in distinguishing miRNA-21 from mismatched and non-complementary RNAs, good stability (87.1% signal retention after 8 days), and reliable performance in serum samples (93.0–99.7% recovery, RSD < 5%). This study develops a versatile electrochemical biosensing platform for miRNA analysis and disease biomarker detection.
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高影响因子
危险品化学品经营许可证（带存储）