ADVANCED FUNCTIONAL MATERIALS
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2021
·Vol. 31
·期 37
·2102838
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IF 18.808
Jun Guo,Jianmin Yang,Zhen-Hua Ge,Binbin Jiang,Yang Qiu,Yu-Ke Zhu,Xiao Wang,Ju Rong,Xiaohua Yu,Jing Feng,Jiaqing He
Bi 2 S 3 -based thermoelectric materials without toxic and expensive elements have a high Seebeck coefficient and intrinsic low thermal conductivity. However, Bi 2 S 3 suffers from low electrical conductivity, which makes it a less-than-perfect thermoelectric material. In this work, halogen elements F, Cl, and Br from halogen acid are successfully introduced into the Bi 2 S 3 lattice using a hydrothermal procedure to efficiently improve the carrier concentration. Compared with the pure sample, the electron concentration of the Bi 2 S 3 sample treated with HCl is increased by two orders of magnitude. An optimal power factor of 470 µW m −1 K −2 for the Bi 2 S 2.96 Cl 0.04 sample at 673 K is obtained. Density functional theory calculations reveal that an effective delocalized electron conductive network forms after Cl doping, which raises the Fermi level into the conduction bands, thus generating more free electrons and improving the conductivity of the Bi 2 S 3 -based materials. Ultimately, an excellent ZT of ≈0.8 is achieved at 673 K for the Bi 2 S 2.96 Cl 0.04 sample, which is one of the highest values reported for a state-of-the-art Bi 2 S 3 system. The energy conversion efficiency of the module reaches 2.3% at 673 K with a temperature difference of 373 K. This study offers a new method for enhancing the thermoelectric properties of Bi 2 S 3 by adding halogen acid in the hydrothermal process for powder synthesis.
研究领域:
材料科学
·
物理学
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DOI
高影响因子
BMC PLANT BIOLOGY
·
2020
·Vol. 20
·期 1
·1-17
·
IF 3.497
Xue Cheng,Guan Si-Cong,Chen Jian-Qing,Wen Chen-Jin,Cai Jian-Fa,Chen Xu
Background Pectin methylesterase (PME) is a hydrolytic enzyme that catalyzes the demethylesterification of homogalacturonans and controls pectin reconstruction, being essential in regulation of cell wall modification. During fruit ripening stage, PME-mediated cell wall remodeling is an important process to determine fruit firmness and softening. Strawberry fruit is a soft fruit with a short postharvest life, due to a rapid loss of firm texture. Hence, preharvest improvement of strawberry fruit rigidity is a prerequisite for extension of fruit refreshing time. Although PME has been well characterized in model plants, knowledge regarding the functionality and evolutionary property of PME gene family in strawberry remain limited.Results A total of 54 PME genes (FvPMEs) were identified in woodland strawberry (Fragaria vesca ‘Hawaii 4’). Phylogeny and gene structure analysis divided these FvPME genes into four groups (Group 1–4). Duplicate events analysis suggested that tandem and dispersed duplications effectively contributed to the expansion of the PME family in strawberry. Through transcriptome analysis, we identified FvPME38 and FvPME39 as the most abundant-expressed PMEs at fruit ripening stages, and they were positively regulated by abscisic acid. Genetic manipulation of FvPME38 and FvPME39 by overexpression and RNAi-silencing significantly influences the fruit firmness, pectin content and cell wall structure, indicating a requirement of PME for strawberry fruit softening.Conclusion Our study globally analyzed strawberry pectin methylesterases by the approaches of phylogenetics, evolutionary prediction and genetic analysis. We verified the essential role of FvPME38 and FvPME39 in regulation of strawberry fruit softening process, which provided a guide for improving strawberry fruit firmness by modifying PME level.
研究领域:
植物生物学
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基因组学
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分子遗传学
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农学
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DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Xingjie Lu,Zhen Liu,Xin Wang,Yuekun Liu,Hongchao Ma,Meiwen Cao,Wentao Wang,Taihong Yan
Novel MnO 2 @ZIF-8 nanocomposites were synthesized for efficient adsorptive removal of Sr 2+ from aqueous solution. ZIF-8 nanoparticles with controlled morphology and size were first synthesized by using amino acids to modulate the crystal nucleation and growth. Then, a layer of MnO 2 nanoparticles were deposited on ZIF-8 surface by using the adsorbed amino acid molecules as binding sites to mediate MnO 2 mineralization and by adjusting the reactive KMnO 4 concentration to control the size and surface density of the MnO 2 nanoparticles . The as-prepared MnO 2 @ZIF-8 nanocomposites showed a core-shell structure and displayed superior performance in Sr 2+ adsorption and removal from aqueous solution. The adsorption process can be described well by the pseudo-second-order equation. The adsorption isotherm accords well with the Langmuir model and the maximum adsorption capacity can reach 65.7 mg/g. The study paves a new way to develop novel inorganic nanocomposites as highly efficient and potential adsorbents for the treatment of radionuclide-containing wastewater.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Jianxing Liang,Yixin Xue,Jia-nan Gu,Jingdong Li,Feng Shi,Xin Guo,Mingming Guo,Xin Min,Kan Li,Tonghua Sun,Jinping Jia
A selective separation-recovery process based on tuning organic acid was proposed to the resource recycling of spent lithium-ion batteries (LIBs) for the first time. The low-cost preparation of CoFe 2 O 4 , reuse of waste acid and recovery of Li can be realized in this process, simultaneously. Li and Co in spent LIBs can be leached efficiently using citric acid as a leaching agent, and separated effectively from leaching solution by tuning oxalic acid content. The results from the characterizations of the prepared CoFe 2 O 4 (CoFe 2 O 4 -LIBs) show that it possesses higher ratio of Co(II)/Co(III) and Fe(II)/Fe(III), larger surface specific area and more number of acid sites in comparison with pure CoFe 2 O 4 . Besides, CoFe 2 O 4 -LIBs was used to activate peroxymonosulfate (PMS) for the degradation of bisphenol A (BPA). Interestingly, its degradation performance is superior to that of pure CoFe 2 O 4 and the related Co-based catalysts. The excellent degradation performance can be maintained in presence of inorganic ions (e.g., C l − , HC O 3 − , H 2 P O 4 − and N O 3 − ) with high concentration or humic acid . Moreover, surface-bound S O 4 ∙ − is considered as the main reactive species for the degradation of BPA. More importantly, CoFe 2 O 4 -LIBs can be readily recycled by using an external magnet and own superior ability of regeneration.
研究领域:
环境科学
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材料科学
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催化化学
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产品关联
DOI
PubMed
高影响因子
MOLECULES
·
2025
·Vol. 30
·期 3
·466
·
IF 4.6
Xianlu Lei,Shuang Li,Jian Zeng,Meiqi Huang,Miaomiao Ma,Xueyan Ran,Xiang Chen,Yuting Yin,Qi Sun,Tao Le
Zinc oxide (ZnO) semiconductors are renowned for their cost-effective synthesis and superior catalytic attributes, making them prominent in environmental remediation applications. This study presents the synthesis of ZnO nanoparticles (NPs) with distinct morphologies, achieved by modulating citric acid concentrations in an ultrasonic-assisted hydrothermal process. The photocatalytic efficacy of these ZnO NPs in degrading malachite green (MG), a persistent environmental pollutant, was thoroughly investigated. Our findings reveal a strong correlation between the morphological features of ZnO catalysts and their photodegradation performance. Among the synthesized NPs, the chrysanthemum-shaped ZnO (denoted as USZ-0.1) demonstrated exceptional photocatalytic activity, attributed to its enhanced surface area and optimized nano-crystal aggregation. This structure facilitated the generation of a higher concentration of reactive oxygen species, leading to over 96.5% degradation of MG within 40 min under simulated sunlight in an acidic medium. This study underscores the potential of morphological manipulation in enhancing the photocatalytic properties of ZnO NPs for environmental applications.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Xiaofeng Wei,Ying Chen,Shan He,Huiting Lian,Xuegong Cao,Bin Liu
Metal-organic framework (MOF)-based electrochemical interface presents a broad platform for the chiral recognition of amino acids , but the inferior conductivity of most MOFs limits the sensitivity in practical applications of electrochemical sensing. Therefore, the L-histidine-regulated zeolitic imidazolate framework (L-His-ZIF) was proposed as a novel electrochemical interface for simple, efficient, and enantioselective determination of L-glutamate (L-Glu) based on the electrochemical impedance spectroscopy (EIS). Based on the resistance change, the L-His-ZIF interface can be directly used for chiral recognition without the assistance of high-conductive substances, where multiple immobilizations are generally required in MOF-involved voltammetry . The stacked L-His-ZIF nano-polyhedrons provided numerous cavities and high specific surface area, thereby forming adequate chiral recognition sites. Based on the L-His-ZIF interface, the enantioselective detection of l -Glu-was successfully achieved with a good linear relationship with the impedance difference in the range from 0.1 nM to 50 nM with the detection limit of 0.06 nM. This prepared ZIF-functionalized electrode provided the desired enantioselectivity and reproducibility with robust chiral recognition in the real application. More importantly, MOF-modified EIS can be applied for more chiral recognition of enantiomers by various MOF interfaces, which has great potential for applications in pharmaceutical monitoring and biochemical analysis.
研究领域:
分析化学
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生物医学工程
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DOI
高影响因子
RENEWABLE ENERGY
·
2021
·
IF 8.001
Yuan Cheng,Yao Liu,Junhua Zhang,Rulu Huang,Yue Wang,Shuwan Cao,Liang He,Lincai Peng
The synthesis of porous material endowed with high Lewis acid-base sites for catalytic transfer hydrogenation (CTH) of carbonyl compounds to their corresponding alcohols has become a hot topic. Herein, a mesoporous metal-organic hybrid (Zr-FDCA) was prepared through facile self-assembly of biomass-based 2,5-furandicarboxylic acid (FDCA) and zirconium by using acetic acid as the modulator. Its catalytic activity was tested by CTH of furfural (FAL) to furfuryl alcohol (FOL) in isopropanol. The characterization results revealed that Zr-FDCA displayed higher Lewis acid-base sites due to the competition between acetic acid and FDCA , thus exhibiting an outstanding catalytic performance to give a FOL yield up to 100% at 150 °C in 3 h. Based on the experimental results, a kinetic model describing this reaction has been established and shown a good correlation between the measured and predicted data, which can provide an effective tool to monitor the process and tailor the process conditions to obtain the desired product. More gratifyingly, Zr-FDCA displayed good recyclability , which can be easily separated from the reaction mixture and repetitively used at least five runs without an obvious loss of activity.
研究领域:
催化化学
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材料科学
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产品关联
DOI
高影响因子
Small
·
2023
·Vol. 19
·期 45
·2304096
·
IF 13.3
Pei Jia,Qiushuang Wu,Boyang Sun,Li Wang
The elaborate defect-engineering of luminescent metal-organic frameworks (MOFs) allows them with enhanced sensing performance. A modulator-induced defect formation strategy is adopted in this paper, and the impact of the open-metal sites on sensing process is rationalized. It is demonstrated that the defect level can be tuned to a remarkable extent by controlling the amount of modulator. When a particular defect concentration is reached, the UiO-66-xFA can be acted as highly sensitive ratiometric fluorescence probes for chlortetracycline (CTE) determination with an ultralow detection limit of 9.9 n m . Furthermore, by virtue of the obvious variation in fluorescence chromaticity of probes from blue to yellow, a sensory hydrogels-based smartphone platform is proposed for visible quantitation of CTE by identifying the RGB values. A delicate device integrated with UV lamp and dark cavity has been developed for avoiding inconsistencies of ambient light and visual errors. Finally, the sensor obtains satisfactory results in the detection of actual seafood samples, with no significant differences from those of liquid chromatography−mass spectrometry. This approach anticipates a novel route to sensitize optical sensors through the design and synthesis of moderate defects in luminescent MOFs.
研究领域:
材料科学
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分析化学
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环境监测
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DOI
PubMed
高影响因子
Nanoscale
·
2018
·Vol. 10
·期 27
·13194-13201
·
IF 7.233
Ting Liu,Yongxin Liu,Lili Yao,Wenxiu Yang,Long Tian,Huiling Liu,Dan Liu,Cheng Wang
Citric acid (CA) is introduced to modulate the synthesis of octahedral HKUST-1 (also known as Cu3(BTC)2, BTC = benzene-1,3,5-tricarboxylate) particles with hierarchical micro, meso- and/or macropores (noted as HP-HKUST-1 particles) under mild conditions. The particle size of the resultant product could be tuned from 300 nm to 2.4 μm by varying the amount of CA added, solvents, reaction time and so on. The intrinsic microporous structure of HKUST-1 is maintained despite the strong chelation capability of CA towards Cu2+ while the larger pores’ size is in the range of 30 to 100 nm. The possible formation mechanism of these octahedral HP-HKUST-1 particles is proposed on the basis of our systematic investigations. The resulting micrometer HP-HKUST-1 particle is employed to encapsulate phosphomolybdic acid hydrate (HPMo), a catalyst for the methanolysis of styrene oxide. After encapsulation, a superior catalytic activity with a high conversion rate (99.6%) is achieved when the reaction is carried out at 40 °C for 20 min.
研究领域:
材料化学
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纳米科技
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多孔材料
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催化化学
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晶体工程
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DOI
高影响因子
Journal of Physical Chemistry C
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2015
·
IF 4.772
Rui Wang,Xiaohui Ji,Zhenzhen Huang,Yurui Xue,Dayang Wang,Wensheng Yang
In this work, SiO2@Au core–shell particles under ambient conditions were prepared by using 120 nm SiO2 spheres with ca. 4 nm Au nanoparticles decorated on the surfaces as seeds, the aqueous solutions of sodium citrate/HAuCl4 mixtures as growth solutions, and hydroxylamine as reducing agent. The morphology of the Au shells obtained on the SiO2 spheres was readily regulated only by the citrate-to-HAuCl4 molar ratio; no deliberate adjustment of the temperature and pH of the reaction media was needed. When the citrate-to-HAuCl4 molar ratio in the growth solution was below 4:1, the surfaces of the SiO2 spheres were covered with sparsely packed Au nanoparticles with sizes in the range of 20–40 nm, depending on the citrate-to-HAuCl4 molar ratio. When the citrate-to-HAuCl4 molar ratio in the growth solution was above 8:1, the surfaces of the SiO2 spheres were coated by complete, uniform Au nanoshells. Concomitant with this citrate-regulated morphology, the localized surface plasmon resonance peaks of the resulting SiO2@Au particles shifted from 611 nm for the sparse Au nanoparticle coating to 784 nm for the complete Au nanoshell coating. Furthermore, the sparsely packed Au nanoparticle coating showed stronger surface enhancement Raman spectroscopic signals than the uniform Au nanoshell coating, while the latter exhibit higher photothermal efficiency than the former.
研究领域:
材料科学
·
纳米技术
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产品关联
DOI
高影响因子
Journal of Materials Chemistry B
·
2019
·Vol. 7
·期 36
·5554-5562
·
IF 5.047
Jianing Zhang,Jing Jin,Yanqiu Du,Xiang Zhou,Haojun Liang,Wei Jiang
DNA-functionalized gold nanoparticles (DNA–AuNPs) have shown great potential and exciting opportunities for constructing machine-like nanodevices. Nonthiolated DNA can be grafted onto gold surfaces via DNA bases, such as polyadenine (polyA)–DNA. The colloidal stability of polyA–DNA–AuNPs has a significant dependency on salt and pH that affects the assembly of AuNPs and their application in polyA–DNA molecular machines. High salt and low pH value contribute to the stabilization of polyA–DNA–AuNPs. In acid conditions, adenine can be protonated and becomes positively-charged, thus enhancing the adsorption of polyA–DNA onto the gold surface by electrostatic interactions; coordination of multiple interactions achieves a high DNA grafting density and colloidal stability. In addition, the length of adenine has an important effect on the efficiency of the DNA machine, while the length of thymine has little effect when the thymine length is less than or equal to seven. The assembly of AuNPs driven by dynamic polyA–DNA molecular machines was successfully accomplished with A5-DNA and A9-DNA. A moderate concentration of catalyst oligomer (50 nM) could improve the DNA hybridization efficiency. The A9-DNA based molecular machine is more efficient than the A5-DNA based one because of the larger amount of A9-DNA on the AuNPs, which increases the probability of collisions between complementary DNA strands. Therefore, polyA–DNA functionalized nanoparticles can be used as a basic unit to construct assembly-ordering structures and achieve dynamic molecular machines to be applied in the molecular diagnostics field.
研究领域:
纳米技术
·
生物化学
·
分子诊断
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DOI
PubMed
高影响因子
FUEL
·
2025
·
IF 7.5
Shiyu Wang,Shuai Wang,Mingmei Ge,Yang Zhao,Hua Song,Huan Wang
This work introduces a template-free strategy for preparing three-dimensional (3D) honeycomb-like graphitic carbon nitride (g-C 3 N 4 ) with high specific surface area through phosphoric acid-regulated supramolecular self-assembly. By systematically tuning phosphoric acid dosage, the self-assembly process of melamine-cyanuric acid aggregates is precisely controlled, resulting in a hierarchically porous architecture with interconnected channels and abundant porosity. The optimized phosphoric acid-mediated support (SSCN-0.89) enables uniform dispersion and stabilization of ultrafine Pt nanoparticles (∼1.7 nm) via enhanced metal-support interactions. Under mild conditions (120 ℃, 0.5 MPa H 2 ), the resultant Pt/SSCN-0.89 catalyst achieves 94.1 % phenol conversion within 80 min with exclusive cyclohexanol selectivity (100 %). Mechanistic studies reveal that the hierarchical porous structure facilitates rapid mass transfer, while the tailored surface nitrogen species lower the reaction energy barrier. The catalyst retains robust stability over five cycles, demonstrating the pivotal role of 3D morphological engineering in designing high-performance carbon nitride-based catalytic supports for biomass upgrading.
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高影响因子
危险品化学品经营许可证（带存储）