Sustainable Chemistry and Pharmacy
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2023
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IF 6
Qiuyun Zhang,Yanting Lei,Luyan Li,Jiao Lei,Mengmeng Hu,Taoli Deng,Yutao Zhang,Peihua Ma
A novel Bi-based metal-organic framework impregnated phosphomolybdic acid (PMA@Bi-MOF) catalyst has been fabricated via a simple hydrothermal procedure, and successfully applied in the preparation of biodiesel using oleic acid (OA) as the raw material. The PMA@Bi-MOF composites were exhaustively characterized with the help of FTIR , XRD, TPD-NH 3 , SEM-EDX, N 2 -physisorption, TGA , and XPS analyses. Experimental findings showed that the PMA@Bi-BTC exhibited a higher activity than that of PMA@Bi-BDC and Bi-BTC, attributed to its textural property, the presence of more acid sites with higher strength, and synergistic catalytic effects between PMA and Bi-BTC. The optimum conditions for esterification of OA, with a conversion of up to 92.5%, were found to be a molar ratio of methanol to OA of 20:1 and 0.15g PMA@Bi-BTC catalyst at 160 °C in 3 h. Meanwhile, reused studies indicated that the OA conversion reached more than 80% after seven reaction cycles. Furthermore, the activation energy of esterification catalyzed by PMA@Bi-BTC was also calculated as 54.8 kJ/mol. It is expected that our study provides an efficient route to biofuel production involving polyoxometalates/MOF synergistic catalysts.
研究领域:
催化化学
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能源科学
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材料科学
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DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2024
·
IF 5.7
Kuangjun Li,Chunxia Huang,Tianyou Chen,Suxing Jiao,Jing Wu
Background Chemiluminescence (CL) analysis, characterized by its simple instrumentation, high signal-to-noise ratio, wide linear range, and minimal background interference, has garnered increasing attention from researchers. Nanomaterials (NMs) have been explored to enhance CL intensity. Notably, sub-1 nanometer scale NMs are considered to hold significant untapped potential due to their size effects. The application of these sub-1 nanometer NMs in enhancing CL is anticipated to yield favorable results. Additionally, the low water solubility and bioavailability of quercetin glycosides lead to their presence in bodily fluids at only trace levels, highlighting the urgent need for efficient and rapid detection methods. Results In this work, phosphomolybdic acid (PMA) was incorporated into CuO to synthesize sub-1 nanometer CuO-PMA nanosheets (SNSs) using a cluster-core co-assembly strategy. Conformational and structural characterization confirmed the successful synthesis of these nanosheets. The CuO-PMA SNSs were employed to enhance the CL emission of the luminol-H 2 O 2 system, resulting in an increase of over 1000 times. The catalytic properties of CuO-PMA SNSs significantly facilitated the decomposition of H 2 O 2 , leading to an enhanced production of reactive oxygen species, which in turn induced the CL enhancement. Given that the antioxidant effect of quercetin would consume the reactive oxygen species generated during the catalysis, a decrease in CL intensity was anticipated. A CL sensor for quercetin detection was developed based on the CuO-PMA SNSs-luminol-H 2 O 2 system, demonstrating a strong linear relationship (R 2 = 0.9969) and a low detection limit of 0.31 nM. Significance This research provides a strategy to enhance the CL intensity of the luminol-H 2 O 2 system by using CuO-PMA SNSs, offering a highly sensitive assay for detecting quercetin concentrations. The method is characterized as a simple and cost-effective analytical strategy making CL analysis very attractive for chemical analysts.
研究领域:
分析化学
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纳米材料科学
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生物医学
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DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
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2022
·Vol. 29
·期 26
·39427-39440
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IF 5.19
Wang Cheng,Li Airong,Ma Yuling,Qing Shenglan
Due to the increasingly serious environmental problems caused by the combustion of sulfides in fuel, deep desulfurization of fuel became particularly urgent. Herein, the catalyst (PMA@MOF-808) of the Zr-based metal–organic framework (MOF-808) encapsulating phosphomolybdic acid (PMA) was prepared via a one-pot hydrothermal method. Besides, the formate ions of PMA@MOF-808 were removed by posttreatment with methanol, resulting in formate-free PMA@MOF-808-H catalysts with unsaturated open metal sites. The as-synthesized catalysts were systematically characterized by XRD, FT-IR, SEM, BET, TGA, 1 H NMR and XPS. The catalysts were also applied in catalytic oxidation desulfurization of fuel. The results indicated that the introduction of PMA and the removal of formate ions can improve the desulfurization performance of catalysts. Formate-free 0.2-PMA@MOF-808-H catalyst can reach 100% desulfurization rate for DBT. Besides, the kinetic properties were studied, and the apparent activation energy was 29.34 kJ/mol. Graphical abstract
研究领域:
材料科学
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环境科学
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DOI
PubMed
高影响因子
LWT-FOOD SCIENCE AND TECHNOLOGY
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2023
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IF 6
Junyan Liu,Tengyi Huang,Riyi Xu,Zhufang Xiang,Thanapop Soteyome,Xiangyi Chen,Qianfei Zhang,Qiurong Huang,Zixu Wu,Yunyi Huang,Gongliang Liu,Chunyun Qu,Gamini Seneviratne,Birthe V. Kjellerup,Zhenbo Xu
Escherichia coli O157:H7 is a major foodborne pathogen causing food poisoning. Standard detection method for foodborne E. coli is plate counting, which is time consuming and omits VBNC cells. PSR is an isothermal amplification technique identifying trace amount DNA. However, its effectiveness is influenced by residual DNA from dead cells. This study aimed at designing a PMA-PSR system for accurate determination of viable cells of E. coli O157:H7. Firstly, PSR was optimized in fluorescence indicator, betaine concentration and reaction time. The optimized system could successfully identify rfbE, stx1 and stx2 genes within 45 min at 65 °C. Secondly, sensitivity and specificity were tested in pure culture and different food samples. With 100% specificity, PSR could determine DNA amount as low as 1.12 pg/μL. Thirdly, a PMA-PSR system was designed for accurate determination of viable cells. Cells were treated with 5 μg/mL PMA to remove residual DNA from dead cells. Pretreated cells were adapted to PSR, thus viable cells were specifically detected. Fourthly, the system was applied in food samples with VBNC cells. Viable cells could be accurately determined in accordance with regular assay. In conclusion, the PMA-PSR system was an efficient tool for accurate determination of E. coli O157:H7 viable cells.
研究领域:
微生物学
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食品科学
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DOI
高影响因子
Nano Research
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2018
·Vol. 11
·期 12
·6244-6251
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IF 7.994
Zhang Xuejing,Wang Xingchao,Liu Shuang,Tao Zhanliang,Chen Jun
In recent years, development of all-solid-state batteries has become a promising approach to improve the safety of batteries. Herein, we report the preparation of a new composite polymer electrolyte (CPE) for use in all-solid-state sodium ion batteries. The CPE comprising of poly(methacrylate) (PMA), poly(ethylene glycol) (PEG), α -Al 2 O 3 with acidic surface sites, and NaClO 4 exhibited high ionic conductivity (1.46 × 10 -4 S·cm -1 at 70 °C), wide electrochemical stability window (4.5 V vs. Na + /Na), and good mechanical strength. With the introduction of the prepared CPE and Na 3 V 2 (PO 4 ) 3 , the final all-solid-state sodium ion batteries showed good rate and cycle performance, with a high reversible capacity of 85 mAh·g -1 when operated at 0.5 C (1 C = 118 mA·g –1 ) and 94.1% capacity retention rate after 350 cycles at 70 °C. Our work provides a novel solid electrolyte for the development of all-solid-state sodium ion batteries.
研究领域:
材料科学
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电化学
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能源存储
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DOI
高影响因子
Soft Matter
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2018
·Vol. 14
·期 35
·7107-7112
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IF 3.709
Ting Qu,Song Guan,Chen Zhang,Xiaoxiong Zheng,Yongbin Zhao,Aihua Chen
Block copolymer (BCP) films with perpendicularly aligned cylindrical domains of high aspect ratio have important applications in diverse fields. However, an aspect ratio of the cylinders as high as 200 has rarely been reported so far. Here we demonstrate an efficient route to the formation of normally aligned P4VP cylinders with high aspect ratio surrounded by a matrix of azobenzene-containing block (PMA(Az)) via hierarchical self-assembly. A crisscross structure, consisting of parallelly aligned liquid crystalline (LC) layers and normally aligned self-assembly domains, is expected to assist the formation of well-defined nanostructures. The LC layers in the cylindrical films self-assemble to form smectic phase after solvent annealing, as confirmed by WAXD and UV-vis spectra. We found that the aspect ratio of the vertical P4VP cylinders is up to 200 and the film thickness reaches 6 μm. P4VP is a functional polymer, making this P4VP-b-PMA(Az) film more suitable for advanced filters, multi-nanochannels, nanolithography, and high-density storage media, etc.
研究领域:
材料科学
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纳米技术
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聚合物科学
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自组装
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DOI
高影响因子
INORGANIC CHEMISTRY
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2019
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IF 4.85
Da Chen,Shiqiang Hao,Guojun Zhou,Chenkai Deng,Quanlin Liu,Shulan Ma,Christopher Wolverton,Jing Zhao,Zhiguo Xia
Low-dimensional organic–inorganic hybrid metal halides have emerged as broadband light emitters for phosphor-converted white light-emitting diodes (WLEDs). Herein, we report a new zero-dimensional (0-D) lead-free metal halide (PMA)3InBr6 [PMA+: (C6H5CH2NH3)+] that crystallizes in the monoclinic system with P21/c space group. The structure consists of slightly distorted [InBr6]3– octahedra surrounded by organic PMA+ cations. The direct band gap characteristic of (PMA)3InBr6 was demonstrated by density functional theory calculation, and its relatively wide band gap of 3.78 eV was experimentally determined. Upon 365 nm ultraviolet light excitation, (PMA)3InBr6 exhibited strong broadband orange luminescence with a full-width at half-maximum of ∼132 nm resulting from self-trapped exciton emission, and the photoluminescence quantum yield was determined to be ∼35%. A WLED fabricated by combining the orange-emitting (PMA)3InBr6, a green phosphor Ba2SiO4:Eu2+, and a blue phosphor BaMgAl10O17:Eu2+ exhibited a high color-rendering index of 87.0. Our findings indicate that the organic–inorganic hybrid (PMA)3InBr6 may have potential for luminescence-based applications.
研究领域:
材料科学
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光学
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DOI
PubMed
高影响因子
ANALYTICA CHIMICA ACTA
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2024
·
IF 5.7
Li Li,Lin-Lin Zhang,Jin Zou,Jiamin Zou,Lu-Ying Duan,Yansha Gao,Guanwei Peng,Xigen Huang,Limin Lu
Background Lanthanide metal-organic frameworks (Ln-MOFs) are a kind of emerging crystalline porous materials with high fluorescence and easy-to-tunable properties, making them ideal for sensing applications. However, current Ln-MOFs based fluorescent probes are primarily single-emissive or fluorescence-quenched, which greatly limited the detection performances such as sensitivity, accuracy and repeatability, thereby hindering their applications in efficient target monitoring and related disease diagnosis. To address these issues, the reasonable design of Ln-MOFs equipped with dual fluorescence emissions and light-up mode is urgently needed for a high-performance biosensor . Results A dual-emissive europium doped UiO-66 (Eu@UiO-66-NH 2 -PMA)-based ratiometric fluorescent biosensing platform was constructed for highly sensitive and selective detection of the histidinemia biomarker-histidine (His). Eu@UiO-66-NH 2 -PMA (pyromellitic acid abbreviated as PMA) was synthesized utilizing a post-synthetic modification method via coordination interactions between the free –COOH of UiO-66-NH 2 -PMA and Eu 3+ , which exhibited characteristic peaks of broad ligand emission and sharp Eu 3+ emissions simultaneously. Considering that Cu 2+ had the excellent fluorescence quenching ability toward Eu 3+ and superior affinity with His, it was deliberately introduced into the Eu@UiO-66-NH 2 -PMA, acting as active sites for target His responsiveness. The Eu@UiO-66-NH 2 -PMA/Cu 2+ /His ternary competition system demonstrated a low detection limit of 74 nM, excellent selectivity and good anti-interference capability that allowed for sensitive analysis of His levels in milk and human serum samples. Significance Attributing to the superior luminescent properties, good stability and self-calibration capability of Eu@UiO-66-NH 2 -PMA, the developed ratiometric light-up sensing platform enabled sensitive, selective and credible analysis of His in complex practical samples, which might provide an available tool for food nutrition guideline and diagnostic applications of His related diseases.
研究领域:
生物化学
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医学诊断
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材料科学
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产品关联
DOI
PubMed
高影响因子
POLYMER
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2013
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IF 3.379
Bolin Li,Jie Zhou,Xin Xu,Jincheng Yu,Wei Shao,Yong Fang,Xiaolin Lu
The surface sum frequency generation (SFG) vibrational spectroscopic spectra of PMA and PMMA films prepared from solvents with different qualities were found different. This suggests that the surface molecular structures of PMA and PMMA films were affected by the solvent quality. A simple phenomenological model was used to describe the chain conformational order at the polymer surface by correlating the SFG resonant signals of the side chromophoric groups to the introduced chain arc included angle. This model is believed to be applicable for polymers with short and rigid side chromophores active for the SFG spectroscopy.
研究领域:
材料科学
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光谱学
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产品关联
DOI
高影响因子
POLYMER DEGRADATION AND STABILITY
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2026
·
IF 8.1
Zilu Wang,Meng Huang,Jiachi Feng,Hang Li,Bo Qi
A crosslinking modification method for cellulose pressboard via PMA is proposed. • Modification synergistically enhances electro-mechanical properties of pressboard. • Modified pressboard better retains multiple properties during thermal aging. • Structural evolution underlying PMA-induced performance improvement is revealed. Cellulose insulation pressboard serves as both electrical insulation and mechanical support in power transformers. Developing insulation pressboard with superior electrical, mechanical, and thermal stability properties is essential for reliable long-term transformer operation. This study proposes a crosslinking modification method using poly(maleic acid) (PMA) for cellulose insulation pressboard. Fourier transform infrared spectroscopy (FTIR) and dynamic mechanical analysis (DMA) confirm esterification between PMA and cellulose. This reaction forms a crosslinked network that restricts cellulose-chain mobility. After modification, the dielectric constant decreases by 10.60%, while the elongation at break increases by 9.21%. The modification also improves thermal stability of pressboard. After 30 days of accelerated thermal aging, the modified pressboard exhibits a 10.83% lower dielectric constant and a 13.54% higher elongation at break than the unmodified pressboard. Furthermore, the evolution of surface and pore structures is analyzed to elucidate the mechanisms underlying the enhanced electrical, mechanical, and thermal stability properties.
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DOI
高影响因子
LWT-FOOD SCIENCE AND TECHNOLOGY
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2024
·
IF 6
Junyan Liu,Zhufang Xiang,Tengyi Huang,Zhenbo Xu,Gongliang Liu,Chunyun Qu,Thanapop Soteyome,Yuting Luo,Qin Ma,Lei Yuan,Wei Hong,Xuejie Li,Yanrui Ye
Vibrio parahaemolyticus is a predominate cause of microbiological food safety. This study aimed to develop a polymerase spiral reaction (PSR) based assay for rapid and visual detection on V. parahaemolyticus . Firstly, the specificity and conservativity of species-specific target tlh gene were determined. Secondly, targeting tlh and virulence factors tdh and trh , PSR assay was developed and optimized using constructed positive plasmid controls and standard strain. Visualized result determination using fluorescent dye was applied to avoid false positive issues. Thirdly, 44 strains were used for specificity evaluation. Fourthly, pure and mixed species artificial contamination systems were included to test its applicability. In addition, a propidium monoazide (PMA)-PSR assay was set up to determine viable but non-culturable (VBNC) cells. Target tlh gene acquired high specificity and PSR assay was optimized to carry out at 65ᵒC for 1 h. Detection limit of PSR assay in purified genomic DNA, plasmid and artificially contaminated food samples were 5.31–53.1 pg/μL, 100 copies, and 10 3 CFU/mL, respectively, demonstrating the sensitivity as 100-fold higher than regular PCR. With PMA-PSR assay, VBNC cells were accurately determined without the disruption of dead cells and food compositions. Thus, PSR is applicable in detection of V. parahaemolyticus viable cells and virulence factors.
研究领域:
食品安全
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分子生物学
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微生物学
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产品关联
DOI
高影响因子
SOLID STATE SCIENCES
·
2026
·
IF 3.6
Feng-Jun Zhang,Zi-Chen Wang,Jun-Jie Zhang
MoS 2 and LDH were successfully integrated into a two-dimensional/two-dimensional (2D/2D) structure. • PMA with electron-capturing capability was successfully intercalated into the two-dimensional nanosheet layers. • 10% LDH-PMA/MoS 2 shows superior light harvesting capacity, 6.45-fold higher than ZnAl-LDH. Addressing urgent environmental remediation and sustainable energy needs, this study enhances photocatalytic H 2 evolution via rational design of an efficient composite catalyst. In-situ synthesis controllably grew MoS 2 onto LDH-PMA surface, constructing ZnAl-PMA/MoS 2 photocatalytic system. Photocatalytic tests show 10% MoS 2 -loaded composite exhibits optimal light harvesting, achieving 4498.59 μmol g −1 h −1 H 2 evolution, 6.45 times pristine ZnAl-LDH and 3.1 times LDH-PMA, and retaining 3890 μmol g −1 h −1 after six cycles (24 h total), confirming excellent stability. This enhanced performance arises from 2D/2D heterostructure and intercalated PMA's electron trapping capability, facilitating photogenerated carrier separation, suppressing recombination, and boosting. Download: Download high-res image (346KB) Download: Download full-size image
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DOI
高影响因子
危险品化学品经营许可证（带存储）