Journal of Environmental Chemical Engineering
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2024
·
IF 7.4
Mengyu Ren,Tianya Chen,Junxia Chang,Lin Ding,Feilong Hu,Yong Zhang,Shujuan Yang
The study focused on the preparation of spongy polyether sulfone (PES) ultrafiltration membrane and investigated the effects of N-vinylpyrrolidone (NVP) and air exposure time on membrane properties. NVP was used as a pore-forming additive to create interconnected pores in the membrane structure, leading to higher water permeability. Furthermore, longer air exposure generally improved membrane porosity and performance. However, excessive exposure led to membrane shrinkage and reduced mechanical strength . The incorporation of NVP and air exposure effectively mitigates the trade-off effect between permeability and selectivity. this work might provide an effective process for preparing spongy PES ultrafiltration membrane with outstanding antifouling performance, high throughput, and great stability. Therefore, an optimized composite membrane was confirmed by combining the addition of 10 wt% NVP with 40 s air exposure, referred to as M4. The water flux of the M4 membrane reached 797.62 L·m −2 ·h −1 , which was 1.9 times higher than that of a pure PES membrane. Additionally, the rejection rate of bovine serum albumin (BSA) increased from 57.97 % to 95.89 % compared to the pure PES membrane. The spongy PES ultrafiltration membrane exhibited desirable properties for protein separation and wastewater treatment , making them promising materials for various applications in the field.
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ChemCatChem
·
2024
·
IF 3.8
Shu-Jie Yang,Min-Jie Chen,Chao Liu,Yao Yao,Hong-Jian Xu,Xin-Yu Zhao,Ze-Lin Zhao,Jun-Sheng Li,Gang-Gang Chang,Xiao-Yu Yang
Graphical The hierarchical N-doped carbon nanosheets anchored bimetallic oxides were successfully fabricated through an in-situ carbonization of polymetallic MOF nanosheets (CoNiZn-ZIF NSs), which exhibited excellent performance and maintain selectivity stability. Selective hydrogenation of alkynes to alkenes using a low-cost non-noble metal catalyst is urgently desirable but challenging because of their over-hydrogenation to undesired alkanes. Herein, a series of hierarchical N-doped carbon nanosheets anchored bimetallic oxides were successfully fabricated. The resultant composite catalysts had advantages associated with not only two-dimensionality (2D) nanosheets with highly active sites and fast mass transfer, but also bimetallic oxides that dissociate and transfer hydrogen with the assistance of the oxygen vacancies. Furthermore, the bimetallic oxides combined with the advantages of high activity of Ni and the selectivity regulation of Co. Benefiting from these advantages, the catalytic performance of CoNiO 2 −ZnCo 2 O 4 /NC NSs can reach nearly full conversion with 92 % selectivity at moderate reaction conditions and can keep excellent selectivity even prolonging the reaction time to 12 h, outperforming CoNiO 2 −ZnCo 2 O 4 /NC NPs, CoO−ZnCo 2 O 4 /NC NSs, and the commercial Lindlar catalysts, which demonstrate the huge potential for selective hydrogenation applications.
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ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Chengzhi Chen,Zijian Liu,Liangchao Guo,Bingchen Huo,Qi Sun,Lirong Liang,Chunyu Du,Guangming Chen
Human body temperature is a critical physiological indicator, reflecting metabolism and temperature regulation. Biomimetic temperature sensors with high temporal and spatial resolution are highly desired to emulate human skin's temperature perception capabilities. Here, a selective filtration method is proposed to fabricate a jointless p-n thermoelectric module, integrating p-type and n-type materials with minimal interfacial barriers. The structure enables rapid response, minimal signal variation, and a robust linear relationship between open circuit voltage and temperature difference, making it suitable as a biomimetic thermoreceptor for enhancing humanoid robots with intelligent sensing capabilities. A smart thermoelectric sensing system with a high temporal and spatial resolution is developed using with jointless p-n module as the sensing element. In temporal thermal sensing, the sensing system can timely and effectively identify the heat source, with a fast response time of <0.1 s. In addition, in spatial thermal sensing, the system reliably detects thermal stimuli within discrete regions of each measuring area of <1 × 1 cm 2 . This study provides an effective strategy for temperature sensors in thermoelectric sensing and biomimetic thermoreceptor applications.
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BULLETIN OF MATERIALS SCIENCE
·
2024
·Vol. 48
·期 1
·1-11
·
IF 1.9
Wei D,Zhou Z F,Ma H H,Xu W B,Ren F M
Transition metal sulphides derived from metal–organic frameworks (MOFs) have gained increasing attention as promising electrode materials for energy storage, owing to their elevated theoretical capacitance and exceptional electrochemical features. Herein, a simple dual organic ligand strategy and controllable pyrolysis treatment were used to prepare porous micro-rods Co 9 S 8 /Ni 3 S 2 /NC-T (T denotes for temperature) composite materials. Their structure and composition can be precisely controlled by adjusting the pyrolysis temperature. Co 9 S 8 /Ni 3 S 2 /NC-T composite materials possess rich pore structures, unique three-dimensional carbon conductive networks and synergistic effects of Co 9 S 8 and Ni 3 S 2 . Experimental results of cyclic voltammetry revealed that the bimetal sulphides in Co 9 S 8 /Ni 3 S 2 /NC-T can provide substantial redox pseudocapacitance for electrochemical reactions. Electrochemical tests indicated that the optimal carbonization temperature was 700°C, and the Co 9 S 8 /Ni 3 S 2 /NC-700 electrode material has the highest specific capacity of 2288 F g −1 at a current density of 1 A g −1 and an excellent rate capability with retention of about 61.2% at a current density of 10 A g −1 . This study provides methodological guidance for the rational composition control and unique structure of MOF-derived materials for supercapacitors. Graphical
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Catalysts
·
2024
·Vol. 14
·期 10
·681
·
IF 3.8
Dezheng Li,Vilanculo Clesio Calebe,Yuqiao Li,Huimin Liu,Yiming Lei
Photocatalysis is a promising method for methylene blue (MB) degradation due to its effectiveness and environmental compatibility. Among the photocatalysts, titanium dioxide (TiO2) has been widely used for MB degradation due to its exceptional photocatalytic activity. However, the wide bandgap limits the degradation efficiency of TiO2under visible light. Here, an interstitial nitrogen-doped TiO2(5%NT/TiO2) used thiourea as the N source was fabricated for visible light-derived MB degradation. The 5%NT/TiO2exhibited an extended absorption range of visible light. Moreover, photoelectrochemical measurements showed an improvement in the photocurrent response and charge transfer behavior on N/TiO2. Thus, 5%NT/TiO2had enhanced photocatalytic activity compared with pristine TiO2and substitutive N-doped TiO2(5%NAB/TiO2). The accelerated photocatalytic MB degradation process on N/TiO2could be mainly attributed to the interstitial N doping, which caused the appearance of new energy states and extended optical properties. Through comparing the impact of interstitial and substitutive in TiO2activity, our work proposes a suitable form of element doping to enhance the optical properties and photocatalytic activity of TiO2and even other semiconductors, providing guidance for future work.
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CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Yan Wang,Kangqi Cao,Wenlong Sun,Xiangxi Lin,Jianwei Wang,Jessica Villarreal,Longzhi Li
Microwave catalytic pyrolysis of lignin is one of emerging technologies for efficiently converting lignin into fuels and chemicals. Molecular sieves (HZSM-5) are widely used as carriers to load metallic components for biomass pyrolysis but often encounter challenges such as high diffusion resistance and insufficient acidity of acidic sites. Traditionally, HZSM-5 is directly modified to enhance the activity of the acidic sites, but this modification is ineffective in improving the metallic components’ activity. Instead, we made nitrogen doping on Fe and then supported on HZSM-5 to construct Fe-N 25 /HZSM-5 catalysts for microwave catalytic pyrolysis of lignin. The N-doped Fe has the effect of “killing two birds with one stone” on enhancing the catalytic activity. The characterization results indicated that N replaced C of the graphitic carbon network to form carbon nitride structure, and further combined with Fe to generate Fe-N bonds, improving the electronegativity of the metallic component. Besides, the loading of N-doped Fe increased the acidity of the catalyst. The utilization of 1.00Fe-N 25 /HZSM-5 obtained the greatest bio-gas yield (35.2 wt%), a hydrogen yield of 27.8 mL/min, bio-oil yield (36.4 wt%) and phenol selectivity of 46.2 %. The likely pathway of microwave catalytic pyrolysis on Fe-N 25 /HZSM-5 was proposed through DFT calculation, using guaiacol as a model compound. The results suggested that N-doped Fe on HZSM-5 8 T tended to break the side-chain methoxy during pyrolysis of guaiacol, with energy barrier of 0.14 eV. This paper provides a promising strategy for modification of microwave pyrolysis catalysts.
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JOURNAL OF MOLECULAR STRUCTURE
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2024
·
IF 4
Wei He,Xiaohui Ren,Jinyan Liu
The corrosion inhibition behavior of glycine surfactants with different carbon chain lengths (RNC-n, n = 8, 12, 14) of AA2024-T3 aluminum alloy in 0.01 mol·L −1 NaOH solution was investigated. The weight loss and electrochemical methods, XPS, SEM/EDS techniques, quantum chemical calculations, and molecular dynamics simulations were used for studying the corrosion inhibition properties, adsorption behavior, and corrosion inhibition mechanism. When the maximum solubility of 0.01 mol·L −1 was achieved, the inhibition effectiveness of RNC-8 reached 90.55 %. Both RNC-12 and RNC-14 exhibited inhibitory efficiencies of 92.81 % at 0.005 mol· L −1 and 91.83 % at 0.0005 mol· L −1 . RNC-n was shown to be an anodic corrosion inhibitor, since its impact on the anodic reaction was larger than on the cathodic one. RNC-n was able to successfully adsorb on the aluminum surface and form a protective film, which hindered further corrosion damage of the aluminum by the alkaline solution. In addition, the adsorption sites of RNC-n molecules were analyzed, and it was found that the adsorption sites of the corrosion inhibitor were mainly in the carboxyl group. Therefore, this paper can provide some theoretical support for the protection of aluminum alloys against corrosion in alkaline medium.
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MOLECULAR DIVERSITY
·
2024
·
IF 3.9
Zhang Yuhao,Zhou Bohang,Wei Pengan,Liu Le,Bai Ruofei,Wang Yiwei,Zhou Le
Succinate dehydrogenase inhibitors (SDHIs) as one of the fastest-growing fungicide categories for plant protection. In this study, a series of N ′-phenyl pyridylcarbohydrazides as analogues of commercial SDHIs were designed and evaluated for inhibition activity on phytopathogenic fungi to search for potential novel SDHIs. The determination of antifungal activity in vitro and in vivo led to the discovery of a series of compounds with high activity and broad-spectrum property. Especially, N ′-(4-fluorophenyl)picolinohydrazide ( 1c ) and N ′-(3,4-fluorophenyl)picolinohydrazide ( 1ae ) showed 0.041–1.851 μg/mL of EC 50 values on twelve fungi, superior to positive controls carbendazim and boscalid. In vivo activity, 1c at 50 μg/mL showed 61% of control efficacy at the post-treatment 9th day for the infection of P. piricola on apples, slightly smaller than 70% of carbendazim. In terms of action mechanism, 1c showed strong inhibition activity with IC 50 of 0.107 μg/mL on SDH in Alternaria brassicae , superior to positive SDHI boscalid (IC 50 0.182 μg/mL). Molecular docking indicated that 1c can well bind with the ubiquinone-binding region of SDH mainly by hydrogen bond, carbon hydrogen bond, π-alkyl, amide- π stacking, F–N and F–H interactions. Furthermore, scanning and transmission electron micrographs showed that 1c was able to obviously change the structure of mycelia and cell membrane. Fluorescence staining analysis showed that 1c could increase both the intracellular reactive oxygen species level and mitochondrial membrane potential. Finally, seed germination test, seedling growth test and cytotoxicity assay showed that 1c had very low toxicity to plant growth and mammalian cells. Thus, N ′-phenyl pyridylcarbohydrazides especially 1c and 1ae can be considered promising fungicide alternatives for plant protection. Graphical abstract
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MICROCHEMICAL JOURNAL
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2024
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IF 4.9
Yongqiang Wang,Xingyu Hou,Yali Li,Xue Sun,Rui Hu,Yuguang Lv,Rui Jia,Lixin Ding
Luteolin (3′,4′,5,7-tetrahydroxyflavone, LTL) is a kind of hydrophobic flavonoid, which has a number of pharmacological actions. It has a number of pharmacological actions, including anti-inflammatory, antioxidant, anticancer, and antihepatic fibrosis properties. High-dose LTL, on the other hand, can cause oxidative DNA damage and hydroxyl radical generation. It is critical to create easy, sensitive, and dependable LTL detection technologies and delivery methods for LTL quality control, clinical drug monitoring and enhancing drug bioavailability. In this work, a novel phenylboronic acid derived quantum dots (P-QDs) were synthesized for LTL sensitive detection and pH-responsive delivery. It showed remarkable selectivity and a brilliant fluorescence with a quantum yield of 43.62 %. In vitro experiments reveal negligible cytotoxicity. P-QDs and LTL coupling (P-QDs/LTL) showed powerful proliferation inhibition and migration restriction effects on HepG2 cells. In addition, P-QDs/LTL could time-dependently release it to restore fluorescence in the microacidic environment of HepG2 cells, thus demonstrating satisfactory fluorescence imaging capability. This strategy demonstrated a favourable linear relationship between LTL concentration and the fluorescence intensity of P-QDs in the range of 0.02–200 μM ( R 2 = 0.9952), with a detection limit of 1.16 nM (S/N=3). The recoveries in different real samples were in the range of 85.23 %-108.04 % with RSDs ≤6.1 %. The material is both a new attempt at LTL detection methodology and has significant promise for providing pH-responsive intracellular release of drug monitoring and cancer therapies from naked QDs without the requirement for sophisticated modified grafting.
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IEEE SENSORS JOURNAL
·
2024
·
IF 4.3
Yu Wan,Qingsong Luo,Zhenxing Wang,Shuang Gao,Yuting Wang,Changhao Feng
The present study focuses on the synthesis of BiFeO
3
/Bi
2
Fe
4
O
9
composite nanofibers via electrospinning, which exhibit enhanced gas sensing properties towards n-butanol. Notably, the sensors based on 11.3-BFO nanofibers demonstrate a remarkable response of 40.8 to 100 ppm n-butanol, representing an approximately 3.4-fold improvement compared to pure BiFeO
3
nanofibers. Additionally, the 11.3-BFO gas sensor exhibits a rapid response time (18 s) and recovery time (37 s) when operated at a temperature of 150°C. It also exhibits excellent selectivity, good repeatability, and long-term stability. The improved gas sensing performance can be attributed to the formation of heterojunctions and a more textured surface, thereby indicating the potential application of BiFeO
3
/Bi
2
Fe
4
O
9
composite nanofibers as a gas sensor for n-butanol detection. This study further validates the efficacy of constructing heterojunctions in improving the gas-sensitive properties of metal-oxide semiconductor, thereby providing valuable insights for synthesizing and investigating heterojunctions.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Huai Tan,Qiaolin Li,Tiantian Cao,Gang Chen,Hongtao Guan,Chengjun Dong,Zongyou Yin
Controlling the morphology of metal–organic frameworks (MOFs) is critical for tailoring their transformation into metal oxides with unique microstructures and properties, particularly for gas sensing applications. In this study, a dual In-MOF-MF was developed using a mixed linker approach involving terephthalic acid and fumaric acid. These two linkers interact with In 3 + ions to produce nanofibers with a high aspect ratio. The resulting In 2 O 3 -MF exhibits superior acetone sensing properties compared to In 2 O 3 derived from single-linker MOFs. Furthermore, the n-type In 2 O 3 -MF was coupled with p-type PtO to create a p-n junction gas sensor. The combination of rich active sites and the well-defined coupling interfaces between PtO and In 2 O 3 -MF leads to remarkable acetone sensing performance, featuring a high response (347–100 ppm acetone), rapid response/recovery time (34/18 s), excellent selectivity, and a relatively low detection limit (300 ppb). This work highlights a mixed-linker strategy for MOF morphology manipulation, enabling the fabrication of a one-dimensional p-n junction for next-generation advanced acetone sensing applications.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2024
·
IF 4.3
Libo Yuan,Ke Wang,Lei Lei,Dongxin Zhao,Hongyan Yang,Yuan Fang,Kui Lu
A series of Andricin B derivatives were designed and synthesized using fatty acid modification at N-terminus of the antimicrobial peptides. The hydrophobicity of Andricin B was altered through fatty acid modification, and the bioactivity was investigated. The interaction between Andricin B and its derivatives with DNA was measured using multi-spectroscopy. Spectroscopic analysis revealed that Andricin B and its derivatives can interact with ct-DNA and G-quadruplexes DNA, and the interaction related with the length of fatty acid chain. Antimicrobial activity tests showed a significant increase using peptides with 8–10 carbons fatty acid chain. C10-Andricin B exhibited the highest antimicrobial activity, with up to a 16-fold enhancement compared to the original peptide Andricin B. Meanwhile, the protease hydrolysis stability test showed that fatty acid modification improved the stability of Andricin B against protease. Scanning electron microscopy results distinctly showed that C8-Andricin B could rupture the cell wall of bacteria. All results indicated that fatty acid modification peptides are an effective strategy for enhancing activity and stability of antimicrobial peptides. This research provides valuable insights for further research on antimicrobial peptides.
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