Results in Chemistry最新文献_第10页

The investigations of photocatalytic degradation and defluorination of perfluorooctanoic acid using palm kernel shell activated carbon and Fe-Sn binary oxides nanocomposite under visible light irradiation 可见光下棕榈仁壳活性炭与铁锡二元氧化物纳米复合材料光催化全氟辛酸降解脱氟研究

IF 4.2

Results in Chemistry Pub Date : 2025-09-01 DOI: 10.1016/j.rechem.2025.102607

Bernard Barnor , Albert Eshun , Eswaran Prabakaran , Opeoluwa I. Adeiga , Chris Curtis , Kriveshini Pillay

{"title":"The investigations of photocatalytic degradation and defluorination of perfluorooctanoic acid using palm kernel shell activated carbon and Fe-Sn binary oxides nanocomposite under visible light irradiation","authors":"Bernard Barnor , Albert Eshun , Eswaran Prabakaran , Opeoluwa I. Adeiga , Chris Curtis , Kriveshini Pillay","doi":"10.1016/j.rechem.2025.102607","DOIUrl":"10.1016/j.rechem.2025.102607","url":null,"abstract":"<div><div>Perfluorooctanoic acid (PFOA) is a persistent pollutant in the environment that does not break down easily because its strong C<img>F bonds strong. Current methods for degrading organic pollutants such as PFOA often have low mineralization efficiency, need a lot of energy, and cause pollution in other ways. In response to these challenges, this study presents an innovative palm kernel shell activated carbon-supported binary oxide, Fe₂O₃/SnO₂ (PKSAC-Fe₂O₃/SnO₂), as a heterojunction and multifunctional photocatalyst for the decomposition of PFOA under visible light. This research presents an innovative PKSAC-Fe₂O₃/SnO₂ nanocomposite that used the synergistic interaction among the large surface area and adsorption capacity of bio-derived activated carbon, the redox reactivity of Fe₂O₃, and the potent oxidative characteristics of SnO₂. The photocatalytic degradation performance of PKSAC-Fe₂O₃/SnO₂ nanocomposite was tested by irradiation of visible light on it. The optimum conditions were found to be pH 5, a catalyst dose of 5.0 mg, and an initial PFOA concentration of 20 ppm. After 6 of irradiation, the nanocomposite reached an impressive PFOA degradation efficiency of 92.40 % and a defluorination rate of 51.23 %, showing that the fluorinated compound had been mineralized significantly. Mechanistic investigations showed that the hydroxyl radical (•OH) and direct electron were the main species involved in the partial mineralization of PFOA with five shorter-chain intermediates identified. The catalyst's potential reusability coupled with its low-cost, biomass-derived support, present a sustainable solution for PFAS remediation. This work advanced the design of efficient, solar-driven catalysts for persisting pollutant degradation, bridging critical gaps in energy efficiency, cost-effectiveness, and environmental safety.</div></div>","PeriodicalId":420,"journal":{"name":"Results in Chemistry","volume":"17 ","pages":"Article 102607"},"PeriodicalIF":4.2,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144931856","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Novel magnetic MgFe2O4/CAU-17 composites with improved photocatalytic degradation of the antibiotic tetracycline under natural sunlight 新型磁性MgFe2O4/CAU-17复合材料在自然光照下光催化降解抗生素四环素

IF 4.2

Results in Chemistry Pub Date : 2025-09-01 DOI: 10.1016/j.rechem.2025.102666

Thi Minh Nguyet Bui , The Ky Vo , Tran Minh Quang , Van Hung Nguyen , Van Minh Truong

{"title":"Novel magnetic MgFe2O4/CAU-17 composites with improved photocatalytic degradation of the antibiotic tetracycline under natural sunlight","authors":"Thi Minh Nguyet Bui , The Ky Vo , Tran Minh Quang , Van Hung Nguyen , Van Minh Truong","doi":"10.1016/j.rechem.2025.102666","DOIUrl":"10.1016/j.rechem.2025.102666","url":null,"abstract":"<div><div>The demand for effective structures that harness natural sunlight for photocatalytic water remediation remains a significant challenge. Here, hybrid MgFe<sub>2</sub>O<sub>4</sub>/CAU-17 (MFOCAU) materials with varied compositions were prepared by incorporating MgFe<sub>2</sub>O<sub>4</sub> into Bi-MOF CAU-17 during the MOF synthesis. Combining CAU-17 frameworks with ferrite nanocrystallites yielded heterostructures featuring a compatible bandgap combination, enhancing light absorption and improving the separation and migration efficiency of charge carriers. Under natural sunlight irradiation, the MFOCAU catalysts achieved a removal efficiency of approximately 91 % for tetracycline (TC), surpassing pure ferrite and CAU-17. Mechanism assessments, including radical scavenger tests and HPLC-LC/MS measurements, revealed the role of reactive species and the photodegradation pathways of TC. Notably, the produced MgFe<sub>2</sub>O<sub>4</sub>/CAU-17 exhibits magnetic properties, allowing for convenient recovery from the suspension using a magnet. The findings suggest that combining ferrite and MOF could be a potential strategy for producing effective materials for photocatalytic water decontamination.</div></div>","PeriodicalId":420,"journal":{"name":"Results in Chemistry","volume":"18 ","pages":"Article 102666"},"PeriodicalIF":4.2,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144997653","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A comparative study of the adsorption kinetics of AuCN2− and AuS2O323− by prepared activated carbon 活性炭对AuCN2−和AuS2O323−吸附动力学的比较研究

IF 4.2

Results in Chemistry Pub Date : 2025-09-01 DOI: 10.1016/j.rechem.2025.102641

Maâzou Siragi D. B. , Halidou I. Hima , Ibrahim Natatou , Vincent Dubois

{"title":"A comparative study of the adsorption kinetics of AuCN2− and AuS2O323− by prepared activated carbon","authors":"Maâzou Siragi D. B. , Halidou I. Hima , Ibrahim Natatou , Vincent Dubois","doi":"10.1016/j.rechem.2025.102641","DOIUrl":"10.1016/j.rechem.2025.102641","url":null,"abstract":"<div><div>The adsorption behaviour of two gold complexes, <span><math><msup><mfenced><mrow><mi>Au</mi><msub><mfenced><mi>CN</mi></mfenced><mn>2</mn></msub></mrow></mfenced><mo>−</mo></msup></math></span> and <span><math><msup><mfenced><mrow><mi>Au</mi><msub><mfenced><mrow><msub><mi>S</mi><mn>2</mn></msub><msub><mi>O</mi><mn>3</mn></msub></mrow></mfenced><mn>2</mn></msub></mrow></mfenced><mrow><mn>3</mn><mo>−</mo></mrow></msup></math></span>, was examined using activated carbon (AC) derived from <em>Parinari macrophylla</em> walnut shells. The AC samples were prepared by physical activation under N₂ or CO₂ atmospheres at a final pyrolysis temperature of 900 °C. Structural, chemical, and adsorption properties were characterized through N₂ adsorption isotherms, Boehm titration, infrared spectroscopy, and iodine and methylene blue indices. Adsorption experiments were conducted with 2 g·L<sup>−1</sup> of AC in 10 mg·L<sup>−1</sup> Au solutions, over an 8 h contact period, and kinetic modelling was performed using pseudo-first order and pseudo-second order equations. Activated carbons obtained under N₂ and CO₂ atmospheres exhibited specific surface areas of 596 and 1167 m<sup>2</sup>·g<sup>−1</sup>, respectively, with total pore volumes of 0.261 and 0.582 cm<sup>3</sup>·g<sup>−1</sup>, and microporosity exceeding 55 %. Surface chemistry analysis revealed a predominantly basic character, with aromatic C<img>C and carbonyl (C=O) functionalities as the main groups. Gold adsorption efficiencies ranged from 33.87 % to 99.49 %, confirming high aqueous-phase adsorption performance. For both complexes, adsorption kinetics were best described by the pseudo-second-order model, and particle size had a marked effect on adsorption rates.</div></div>","PeriodicalId":420,"journal":{"name":"Results in Chemistry","volume":"17 ","pages":"Article 102641"},"PeriodicalIF":4.2,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144931691","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthesis, antimalarial activity, and molecular docking of some novel pyridinone derivatives containing benzylpiperazine substituents 含苄哌嗪取代基的新型吡啶酮衍生物的合成、抗疟活性及分子对接

IF 4.2

Results in Chemistry Pub Date : 2025-09-01 DOI: 10.1016/j.rechem.2025.102661

Armin Gudarzi , Lotfollah Saghaei , Neda Fayyazi , Mahboubeh Rostami , Parvin Asadi

{"title":"Synthesis, antimalarial activity, and molecular docking of some novel pyridinone derivatives containing benzylpiperazine substituents","authors":"Armin Gudarzi , Lotfollah Saghaei , Neda Fayyazi , Mahboubeh Rostami , Parvin Asadi","doi":"10.1016/j.rechem.2025.102661","DOIUrl":"10.1016/j.rechem.2025.102661","url":null,"abstract":"<div><div>In developing countries, malaria is still one of the major health problems. The resistance of the malaria parasite (<em>Plasmodium</em>) to existing drugs necessitates the introduction of novel antimalarial agents. In light of reports on several pyridinone-based compounds as antimalarial agents, this study presents new antimalarial derivatives of this heterocyclic ring containing benzylpiperazine substituents. The compounds were synthesized with appropriate chemical methods and structurally confirmed with different techniques. The antimalarial activity of the synthesized compounds was evaluated through β-hematin inhibition assay which showed satisfactory activity for 5-(benzyloxy)-2-((4-(4-cholrobenzyl)-1-piperazyl) methyl)-1-methyl-4-pyridinone (<strong>9e</strong>) with 84 % Heme inhibition activity compare to Chloroquine (90 %) as reference. In addition, the interaction of these compounds with the Heme sheet was evaluated through a docking study to identify the theoretical potential of the designed compounds to inhibit β-hematin formation, a key step in the malaria life cycle. The docking results showed good interactions between the compounds and the Heme sheet, particularly for the <strong>9d</strong> and <strong>9e</strong> compounds. The physicochemical properties of the synthesized compounds predicted by the SwissADME web server, were within acceptable limits. Finally, the MTT assay showed that compounds <strong>9d</strong> and <strong>9e</strong> did not display noteworthy cytotoxicity on the L929 fibroblast cell line. The obtained results suggest further study on the <strong>9e</strong> compound as a potential antimalarial agent.</div></div>","PeriodicalId":420,"journal":{"name":"Results in Chemistry","volume":"17 ","pages":"Article 102661"},"PeriodicalIF":4.2,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144931586","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of incorporating cellulose nanocrystals into ZnO/PVA nanocomposite for the production of electrochemical sensor to detect cadmium in water 纤维素纳米晶体加入ZnO/PVA纳米复合材料制备水中镉电化学传感器的效果

IF 4.2

Results in Chemistry Pub Date : 2025-09-01 DOI: 10.1016/j.rechem.2025.102626

Abrar Ismardi , Siti Ashila Farikha Mayundri , Asep Suhendi , Indra Wahyudin Fathona , Muh Zaidan Fauzan

{"title":"Effect of incorporating cellulose nanocrystals into ZnO/PVA nanocomposite for the production of electrochemical sensor to detect cadmium in water","authors":"Abrar Ismardi , Siti Ashila Farikha Mayundri , Asep Suhendi , Indra Wahyudin Fathona , Muh Zaidan Fauzan","doi":"10.1016/j.rechem.2025.102626","DOIUrl":"10.1016/j.rechem.2025.102626","url":null,"abstract":"<div><div>Nanocrystalline cellulose is observed to have excellent absorption benefits due to its low cost, biodegradability, and great biocompatibility. The existence of high content of hydroxyl group and large surface area ensures easy modification process. Therefore, changes were implemented to improve the capacity of heavy metal ions for adsorption with the expectation of developing a highly beneficial method of detecting the presence of harmful metal ions capable of harming all living organisms. In this study, cellulose nanocrystals (CNCs) were incorporated into the ZnO/PVA nanocomposites to improve their ability to adsorb metal ions. In the process of analysis, Glassy Carbon Electrode component used ZnO/PVA/CNC as the working material for the electrode. Moreover, X-ray diffraction (XRD), Field Emission Scanning Electron Microscopy (FE-SEM), Photoluminescence, UV–Vis, and I-V spectroscopy were used to analyze the nanocomposites. The results showed that the addition of CNCs enhanced the optical, mechanical, and electrical properties of the ZnO/PVA. Electrochemical measurements using cyclic voltammetry (CV) and square wave voltammetry (SWV) were carried out with varying Cd concentrations. The modified electrode showed enhanced redox activity and a significant increase in peak current response compared to ZnO/PVA without CNC. The sensor demonstrated a linear response toward Cd in the range of 0–80 ppm, with a limit of detection (LOD) of 12.07 ppm. Although the achieved LOD remains above the thresholds required for drinking water safety by regulatory bodies like the WHO, the results underscore the sensor's potential as a foundational platform for further optimization. This study highlights a proof-of-concept application for cadmium detection, particularly relevant in the context of industrial wastewater monitoring.</div></div>","PeriodicalId":420,"journal":{"name":"Results in Chemistry","volume":"17 ","pages":"Article 102626"},"PeriodicalIF":4.2,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144931709","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

BiOCl–CuO nanocomposite as a bifunctional material for glucose detection and energy storage BiOCl-CuO纳米复合材料作为葡萄糖检测和能量存储的双功能材料

IF 4.2

Results in Chemistry Pub Date : 2025-09-01 DOI: 10.1016/j.rechem.2025.102646

AnnieCanisius D , P. Joselene Suzan Jennifer , M. Gladys Joysi , S. Muthupandi , E. Kavitha , J. Madhavan , M. Victor Antony Raj

{"title":"BiOCl–CuO nanocomposite as a bifunctional material for glucose detection and energy storage","authors":"AnnieCanisius D , P. Joselene Suzan Jennifer , M. Gladys Joysi , S. Muthupandi , E. Kavitha , J. Madhavan , M. Victor Antony Raj","doi":"10.1016/j.rechem.2025.102646","DOIUrl":"10.1016/j.rechem.2025.102646","url":null,"abstract":"<div><div>A BiOCl–CuO (BCC) nanocomposite was synthesized via a solvothermal method and characterized for its dual electrochemical applications in glucose sensing and supercapacitors. High-resolution scanning electron microscopy (HR-SEM) revealed a nanosphere morphology, while electrochemical impedance spectroscopy (EIS) and Brunauer–Emmett–Teller (BET) analysis demonstrated a low charge transfer resistance (6.95 Ω) and a high specific surface area (124.5 m<sup>2</sup>/g), respectively. The synergistic interaction between BiOCl and CuO enhanced glucose adsorption and oxidation, yielding a sensitivity of 0.718 mA mM<sup>−1</sup> cm<sup>−2</sup> and a detection limit of 0.48 mM, as determined by chronoamperometry. In supercapacitor applications, BCC exhibited superior electrochemical performance compared to pure BiOCl, with a higher specific capacitance of 684.92 Fg<sup>−1</sup>, prolonged discharge time, and excellent cycling stability. These findings highlight the potential of BCC as a multifunctional material for high-performance glucose sensors and energy storage devices.</div></div>","PeriodicalId":420,"journal":{"name":"Results in Chemistry","volume":"17 ","pages":"Article 102646"},"PeriodicalIF":4.2,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144931710","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Advancing sustainable medical waste management: The role of pyrolysis in resource recovery and environmental protection 推进医疗废物可持续管理：热解在资源回收和环境保护中的作用

IF 4.2

Results in Chemistry Pub Date : 2025-09-01 DOI: 10.1016/j.rechem.2025.102639

C. Thiagarajan , Devarajan Yuvarajan , Manjunath Channappagoudra , Deepak Bhanot , Vijay J. Upadhye , Sasanka Choudhury , Krishna Kumar Shukla

{"title":"Advancing sustainable medical waste management: The role of pyrolysis in resource recovery and environmental protection","authors":"C. Thiagarajan , Devarajan Yuvarajan , Manjunath Channappagoudra , Deepak Bhanot , Vijay J. Upadhye , Sasanka Choudhury , Krishna Kumar Shukla","doi":"10.1016/j.rechem.2025.102639","DOIUrl":"10.1016/j.rechem.2025.102639","url":null,"abstract":"<div><div>Medical waste presents significant challenges for solid waste management, demanding solutions that are both economically viable and environmentally sustainable. Pyrolysis has emerged as a promising thermochemical method for converting this waste into valuable energy and chemical products. However, practical implementation is often hindered by inefficiencies and concerns related to environmental compliance. Medical waste, which is typically bulky and potentially contaminated, primarily comprises polymer-based materials. These materials pose critical environmental and public health risks if not properly treated. Pyrolysis offers an environmentally friendly alternative by breaking down medical plastics in a low-oxygen environment to yield valuable products such as liquid hydrocarbons, syngas, and char. Recent advancements in catalytic pyrolysis and co-pyrolysis have enhanced product selectivity and yield, improving the commercial viability of the process. This review explores the mechanisms of polymer degradation, the application of pyrolysis for recycling medical waste, and the technological innovations that improve its efficiency. Additionally, the review addresses the environmental and economic aspects of pyrolysis, including strategies for managing feedstock variability, reducing energy consumption, and controlling emissions. Overall, the findings highlight pyrolysis as a promising and sustainable approach for managing medical waste, while also stressing the importance of further research into process optimization and the development of supportive regulatory policies.</div></div>","PeriodicalId":420,"journal":{"name":"Results in Chemistry","volume":"17 ","pages":"Article 102639"},"PeriodicalIF":4.2,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144931711","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High-performance electrocatalytic degradation of crystal violet using graphene hydroxide-modified PbO2 electrode 氢氧化石墨烯修饰PbO2电极高效电催化降解结晶紫

IF 4.2

Results in Chemistry Pub Date : 2025-09-01 DOI: 10.1016/j.rechem.2025.102652

Titin Aryani , Roto Roto , Mudasir Mudasir

{"title":"High-performance electrocatalytic degradation of crystal violet using graphene hydroxide-modified PbO2 electrode","authors":"Titin Aryani , Roto Roto , Mudasir Mudasir","doi":"10.1016/j.rechem.2025.102652","DOIUrl":"10.1016/j.rechem.2025.102652","url":null,"abstract":"<div><div>Electrocatalytic degradation of crystal violet using PbO₂/GOH electrodes (GOH: graphene hydroxide) has been carried out. GOH was synthesized via exfoliation, hydrothermal, and ultrasonication, while the PbO₂/GOH electrode was prepared using EPD (electrophoretic deposition). GOH exhibits a single peak at 266 nm, high intensity of C<img>C and O<img>H stretching vibrations, and an I<sub>D</sub>/I<sub>G</sub> ratio of 0.55 in the Raman spectrum. The XRD pattern shows peak broadening and a 98.22 % decrease in intensity, while the SEM image shows aggregated graphene sheets, a slightly rough surface, and porosity in the form of gaps. The TEM image shows thin GOH layers, and SEM-EDX data indicate that GOH has a C/O ratio of 2.04. The interaction between PbO₂ and GOH is marked by new bands at 683, 843, and 1409 cm<sup>−1</sup>. The morphological change of PbO₂ from fine to coarse particles in PbO₂/GOH was observed via SEM-EDX, indicating interaction between PbO₂ and GOH. Based on SEM-EDX results, the C/O/Pb ratio in PbO₂/GOH is 79.36/17.72/1.46 %. The cyclic voltamogram of PbO₂/GOH shows that the current increases by 73.33 % and the voltage decreases by 23.53 %. The electrodegradation of the crystal violet using PbO₂/GOH within 10 min can remove 99 % of the dye, reduce BOD by 94.08 %, and COD by 95.79 %, while in actual wastewater, it can remove 96 % of the dye and reduce BOD and COD by 97 % and 98 %, respectively. The electrode can be reused up to 10 cycles, and the dissolution of Pb<sup>2+</sup> ions decreased by 71.66 % compared to unmodified PbO₂ electrodes.</div></div>","PeriodicalId":420,"journal":{"name":"Results in Chemistry","volume":"17 ","pages":"Article 102652"},"PeriodicalIF":4.2,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144931688","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sulfated modification, characterizations, anti-oxidant and immunostimulatory activities of a polysaccharide from Arnebia euchroma (Royle) Johnst. Roots 紫草多糖的磺化改性、表征、抗氧化和免疫刺激活性。根

IF 4.2

Results in Chemistry Pub Date : 2025-09-01 DOI: 10.1016/j.rechem.2025.102624

Man Zhang , Peng Zhao , Sarangua Ochir , Wenming Bai , Jingkun Lu , Mu Dan , Surina Bo , Chen Chen

{"title":"Sulfated modification, characterizations, anti-oxidant and immunostimulatory activities of a polysaccharide from Arnebia euchroma (Royle) Johnst. Roots","authors":"Man Zhang , Peng Zhao , Sarangua Ochir , Wenming Bai , Jingkun Lu , Mu Dan , Surina Bo , Chen Chen","doi":"10.1016/j.rechem.2025.102624","DOIUrl":"10.1016/j.rechem.2025.102624","url":null,"abstract":"<div><div>Chinese Zicao, also known as <em>A. euchroma (Royle) Johnst</em>., is a valuable agricultural product with roots in traditional Chinese medicine. A polysaccharide was taken from the <em>A. euchroma (Royle) Johnst.</em> Roots, called ARP, produced immunomodulatory effect by activating spleen lymphocyte and RAW264.7 cells. The chemical modification of natural polysaccharide enhanced its physicochemical and functional aspects. The ARP here is modified by sulfation. The total amounts of sugar and protein of the sulfated derivative (S1-ARP and S2-ARP) were decreased, but the molecular weight were increased. The structural analysis illustrated that the conformation of ARP was altered to a triple-helix structure after sulfation. The immunomodulatory and antioxidant activities of S1-ARP with high degree of substitution (DS = 0.24) were evidently enhanced by sulfated modification than unmodified polysaccharide and S2-ARP with low degree of substitution (DS = 0.028), especially the functional activation of macrophage was strengthened. As such, S1-ARP may be developed as an immunomodulatory drug has possible uses in the pharmaceutical and food industries.</div></div>","PeriodicalId":420,"journal":{"name":"Results in Chemistry","volume":"17 ","pages":"Article 102624"},"PeriodicalIF":4.2,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144931706","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Recent advances in chemical crosslinking of ceramic-coated carbon nanotubes for enhanced electromagnetic interference shielding 陶瓷涂层碳纳米管化学交联增强电磁干扰屏蔽的研究进展

IF 4.2

Results in Chemistry Pub Date : 2025-09-01 DOI: 10.1016/j.rechem.2025.102654

Sarah Abdulrazzag Hosawi , Zahra M. Al-amshany , Katabathini Narasimharao , Khalid A. Alamry , Mahmoud A. Hussein

{"title":"Recent advances in chemical crosslinking of ceramic-coated carbon nanotubes for enhanced electromagnetic interference shielding","authors":"Sarah Abdulrazzag Hosawi , Zahra M. Al-amshany , Katabathini Narasimharao , Khalid A. Alamry , Mahmoud A. Hussein","doi":"10.1016/j.rechem.2025.102654","DOIUrl":"10.1016/j.rechem.2025.102654","url":null,"abstract":"<div><div>Electromagnetic interference (EMI) shielding is critical for the safety and stability of aircraft and defense system operations. Ineffective EMI shielding can lead to malfunctions and catastrophic failures. This review focuses on advances in chemical crosslinking strategies for carbon nanotube (CNT)–ceramic composites, which enhance mechanical strength and EMI shielding efficiency. By optimizing interfacial interactions through various techniques, a uniform ceramic coating on CNTs is achieved, overcoming challenges related to CNTs' inertness and tendency to agglomerate. Appropriate crosslinking significantly improves CNT composite strength and durability by forming strong intermolecular bonds, ensuring stable structural integrity under extreme conditions. Additionally, integrating CNTs with magnetic particles and MXenes yields multilayered coatings with superior EMI shielding, minimal electromagnetic wave reflection, lighter weight, and enhanced reliability. The lightweight, thermally stable, and chemically resistant nature of these composites makes them ideal for aerospace and defense applications, demonstrating the importance of chemical crosslinking in developing advanced EMI shielding solutions.</div></div>","PeriodicalId":420,"journal":{"name":"Results in Chemistry","volume":"17 ","pages":"Article 102654"},"PeriodicalIF":4.2,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144931707","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0