Materials
·
2024
·Vol. 17
·期 5
·1214
·
IF 3.1
Jiabao Wu,Xinpeng Chen,Aijing Li,Tieling Xing,Guoqiang Chen
Synthetic dyes are prone to water pollution during use, jeopardizing biodiversity and human health. This study aimed to investigate the adsorption and photocatalytic assist potential of sodium lignosulfonate (LS) in in situ reduced silver nanoparticles (AgNPs) and chitosan (CS)-loaded silver nanoparticles (CS-LS/AgNPs) as adsorbents for Rhodamine B (RhB). The AgNPs were synthesized by doping LS on the surface of chitosan for modification. Fourier transform infrared (FT-IR) spectrometry, energy-dispersive spectroscopy (EDS), scanning electron microscopy (SEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) were used to confirm the synthesis of nanomaterials. The adsorption and photocatalytic removal experiments of RhB were carried out under optimal conditions (initial dye concentration of 20 mg/L, adsorbent dosage of 0.02 g, time of 60 min, and UV power of 250 W), and the kinetics of dye degradation was also investigated, which showed that the removal rate of RhB by AgNPs photocatalysis can reach 55%. The results indicated that LS was highly effective as a reducing agent for the large-scale production of metal nanoparticles and can be used for dye decolorization. This work provides a new catalyst for the effective removal of dye from wastewater, and can achieve high-value applications of chitosan and lignin.
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DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2023
·
IF 8.8
Yuanyuan Li,Bingxue Liu,Xiaoxue Zhang,Yanjie Liu,Siying Wang,Shujun Li,Xiuhua Zhao
A new amphiphilic oligosaccharide derivative, based on lutein modification onto the OH position of stachyose with facile and mild esterification, was prepared and used to improve the oral bioavailability of lutein. The structures of lutein–stachyose derivative (LS) were confirmed by Fourier transform infrared spectroscopy and hydrogen-1 nuclear magnetic resonance, indicating that one stachyose is connected to one lutein through succinic acid. The critical micelle concentration of LS was approximately 6.86 ± 0.24 mg/mL, corresponding to the free lutein concentration of approximately 2.96 mg/mL. LS has better digestive stability and free radical scavenging ability, and it could inhibit the degradation of lutein in the gastrointestinal tract. Importantly, LS is nontoxic to cells and zebrafish embryos. In terms of oral bioavailability in rats, the AUC 0-12h values of LS were 2.26 times higher than those of free lutein. Therefore, stachyose modification is a promising strategy for improving the oral bioavailability of fat-soluble lutein.
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PubMed
高影响因子
CHEMOSPHERE
·
2023
·
IF 8.8
Wenshan He,Run Jiang,Siqi Li,Minglu Zhang,Tingting Zhang,Xiaobiao Zhu,Xiaohui Wang
Chlortetracycline (CTC), a widely used typical tetracycline antibiotic, has raised increasing concerns due to its potential health and environmental risks. Biodegradation is considered an effective method to reduce CTC in environment. In this study, a strain Aspergillus sp. LS-1, which can efficiently degrade CTC, was isolated from CTC-rich activated sludge . Under optimal conditions, the maximum removal efficiency of CTC could reach 95.41%. Temperature was the most significant factor affecting the degradation efficiency of LS-1. The 19 products were identified in the CTC degradation by strain LS-1, and three degradation pathways were proposed. All the degradation pathways for CTC exhibited ring-cleaving, which may accelerate the mineralization of CTC. To gain more comprehensive insights into this strain, we obtained the genome of LS-1, which had high GC content (50.1%) and completeness (99.3%). The gene annotation revealed that LS-1 contains some vital enzymes and resistance genes that may carry functional genes involved in the CTC degradation. In addition, other antibiotic resistance genes were found in the genome of LS-1, indicating that LS-1 has the potential to degrade other antibiotics. This study provides a more theoretical basis for the investigation of CTC degradation by fungi and new insights into the biodegradation of CTC.
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PubMed
高影响因子
Food Bioscience
·
2023
·
IF 5.2
Hongchi Zhou,Sixuan Wang,Weichao Liu,Lixuan Chang,Xuemei Zhu,Guangqing Mu,Fang Qian
This study aimed to investigate the safety and probiotic properties of Lactobacillus paraplantarum LS-5 isolated from traditional northeastern sauerkraut , and to assess the antioxidant capacity of different solvent extracts (ethanol, water, and hot water) of L. paraplantarum LS-5-inoculated sauerkraut. L. paraplantarum LS-5 was shown to have various probiotic characteristics, such as good survival ability under artificial gastrointestinal conditions, antagonistic activity of various pathogens, non-biogenic amines, antibiotic susceptibility , and non-hemolytic. The 2,2′-azino-bis-3-ethylbenzothiazoline-6-sulfonate (ABTS) radical scavenging activity of the L. paraplantarum LS-5-inoculated sauerkraut alcohol extract (71.13%) was significantly higher than water extract (59.59%) ( p < 0.05). The ferric reducing antioxidant power (FRAP) of sauerkraut alcohol extract (614.93 Trolox μmol L −1 ) exhibited a slightly stronger ability compared to water extract (388.53 Trolox μmol L −1 ) and the heated sauerkraut water extract (383.20 Trolox μmol L −1 ) at extract concentrations of 5.0 mg mL −1 . Its 1, 1-diphenyl1-2-picrylhydrazyl (DPPH) radical scavenging activity was also stronger. It was found by principal component analysis (PCA) and Pearson that the DPPH radical-scavenging activities of sauerkraut extracts were significantly correlated with the content of polyphenols and flavonoids ( p < 0.05). Unlike kimchi , Northeastern sauerkraut is consumed mainly by heating, so this study could contribute to understanding the antioxidant capacity of different solvent extracts of sauerkraut, and before and after heating water extracts.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2026
·
IF 9.2
Qiye Lu,Jing Liu,Guanyi Chen,Beibei Yan,Zhanjun Cheng,Weiming Yi
Conventional biodiesel production relies on external heating, requiring high temperatures and strict control over system water content. This work prepared a magnetic lignin-based heterogeneous acid catalyst Fe 3 O 4 -LS/100-Al using sodium lignosulfonate as support via co-precipitation and impregnation, with Lewis acid sites, and applied it in electrolysis-assisted esterification for biodiesel. The catalyst showed a specific surface area of 115.63 m 2 /g and saturation magnetization of 29.98 emu/g, enabling efficient acid loading and rapid magnetic separation. Under RSM-optimized conditions (catalyst of 6.8 wt%, MOAMR of 12.5:1, voltage of 45.4 V, water content of 4.7 wt%), oleic acid conversion reached 95.25%. Low activation energy (36.04 kJ/mol) confirmed high catalytic activity, and 71.38% conversion was retained after seven cycles. Results prove electrolysis assistance enables efficient, ambient-temperature biodiesel synthesis.
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高影响因子
JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY
·
2016
·
IF 3.031
Xiaobo Xie,Zhenpeng Wang,Yafeng Li,Lingpeng Zhan,Zongxiu Nie
A liquid sampling-atmospheric pressure afterglow microplasma ionization (LS-APAG) source is presented for the first time, which is embedded with both electrospray ionization (ESI) and atmospheric pressure afterglow microplasma ionization (APAG) techniques. This ion source is capable of analyzing compounds with diverse molecule weights and polarities. An unseparated mixture sample was detected as a proof-of-concept, giving complementary information (both polarities and non-polarities) with the two ionization modes. It should also be noted that molecular mass can be quickly identified by ESI with clean and simple spectra, while the structure can be directly studied using APAG with in-source oxidation. The ionization/oxidation mechanism and applications of the LS-APAG source have been further explored in the analysis of nonpolar alkanes and unsaturated fatty acids/esters. A unique [M + O – 3H]+ was observed in the case of individual alkanes (C5–C19) and complex hydrocarbons mixture under optimized conditions. Moreover, branched alkanes generated significant in-source fragments, which could be further applied to the discrimination of isomeric alkanes. The technique also facilitates facile determination of double bond positions in unsaturated fatty acids/esters due to diagnostic fragments (the acid/ester-containing aldehyde and acid oxidation products) generated by on-line ozonolysis in APAG mode. Finally, some examples of in situ APAG analysis by gas sampling and surface sampling were given as well.
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高影响因子
Lubrication Science
·
2026
·
IF 1.9
Runling Peng,Haohao Zhang,Wei Wang,Zequan Wu,Jinyue Liu,Gao Zhan,Junde Guo,Wei Cao
This study prepared graphene/molybdenum disulphide (RGO/MoS 2 ) composite additives via freeze-drying to enhance their dispersion stability and oxidation resistance. The tribological properties and lubrication mechanisms of these nano-additives in lubricating oils were systematically investigated through experimental characterisation and molecular dynamics simulations. Results demonstrated that MoS 2 's interlayer sliding intensifies with increasing load/speed, though excessive mechanical stress induces structural degradation; graphene provides stable support for MoS 2 , reducing atomic slippage and improving synergistic lubrication. A comparison between the experimental and molecular dynamics simulation results leads to the following conclusions: MoS 2 demonstrates superior friction performance under high-speed and light-load conditions compared to RGO/MoS 2 . Conversely, RGO/MoS 2 exhibits better friction performance under high-load and low-speed conditions than MoS 2 alone. Importantly, across various testing conditions, the trends in the friction coefficient curves obtained from molecular dynamics simulations align well with the experimental data.
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高影响因子
Lubrication Science
·
2022
·Vol. 34
·期 3
·210-223
·
IF 1.307
Xiang Rao,Chenxing Sheng,Zhiwei Guo,Xuecheng Zhang,Huabing Yin,Chang Xu,Chengqing Yuan
The performances of diesel cylinder liner-piston ring (CLPR) that works under harsh conditions are very important and affect the service life, reliability and economy of engines. This study aimed to gain insights into the anti-friction and self-repairing properties of lubricating oil with different silicate-based additives for marine diesel CLPR, and expect to find the types and concentrations of additives that are most appropriate for CLPR. Three kinds of silicates, including ultrafine serpentine, attapulgite and kaolin powders, were prepared and modified, and added to the lubricants with different concentrations. The tribological behaviours and worn surface features of the friction pairs were investigated after friction tests. Compared with original oil, it is found that all additives process anti-friction and self-repairing properties at appropriate concentration, and the ultrafine attapulgite powders additive presents the best performance. These findings will aid in understanding the anti-friction and self-repairing abilities of silicate-based additives to diesel CLPR, as well as its potential application to solve the wear failures of CLPR online.
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高影响因子
Lubrication Science
·
2026
·
IF 2.1
Wenjun Yu,Juan Du,Yao Tan,Xiaoqiang Fan
In view of the promising application potential of two-dimensional MXenes (Ti 3 C 2 T x ) in lubrication, along with the challenge of their poor dispersibility in non-polar base oil, this work reports the surface functionalisation of Ti 3 C 2 T x through the covalent grafting of alkylphosphonic acid (TDPA). TDPA grafting converts the surface properties of Ti 3 C 2 T x from polar to non-polar, significantly enhancing its dispersion stability in non-polar PAO20 base oil. Tribological performance tests showed that as an additive, TDPA-Ti 3 C 2 T x improved the anti-wear performance of PAO20 by 38.1%. Its excellent performance is mainly attributed to the high mechanical strength, easy interlayer shear characteristics of the modified nanosheets, and the synergistic effect of the protective tribochemical film formed in situ during the friction process. The TDPA functionalisation strategy is an effective way to realise the efficient application of Ti 3 C 2 T x in non-polar lubricating systems, and provides a new idea for the design of high-performance lubricating additives.
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高影响因子
Lubrication Science
·
2026
·
IF 2.1
Haiyang Ye,Yongxian Chen,Wen Zhong,Yueyang Jiang
To address the performance degradation of ductile iron for traction sheaves caused by long-term wear, this study innovatively proposes a soft-hard alternating surface design. By combining composite micro-textures with solid lubricant coatings, this study aims to synergistically optimise the tribological performance of the traction sheaves, achieving a stable friction coefficient within the range of 0.1 to 0.3 and significantly enhancing wear resistance. Laser processing technology was employed to fabricate four types of micro-textures—pit, groove, wave and biomimetic sea shell on the surface of ductile iron (QT600-3), followed by the application of a waterborne polyurethane (WPU)/polytetrafluoroethylene (PTFE)/molybdenum disulphide (MoS 2 ) solid lubricant coating. Various testing equipment is used to evaluate the friction coefficient, wear rate and surface morphology characteristics under different micro-texture parameters. This study is the first time to propose the integration of micro-texture with solid lubricant coatings on traction sheave materials, providing a feasible solution to enhance their service life. The results indicate that the composite of micro-texture and MoS 2 nanoparticles significantly improves the friction and wear properties of ductile iron. The pit 0.2–0.4 mm exhibited the optimal performance, reducing the friction coefficient to 0.234 and the wear rate to 0.40 × 10 −5 mm 3 /(N m).
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高影响因子
Lubrication Science
·
2022
·Vol. 34
·期 5
·347-355
·
IF 1.307
Yongliang Jin,Jian Li,Weimin Lee,Bingxue Cheng,Dan Jia,Jiesong Tu,Shengpeng Zhan,Tian Yang,Haitao Duan
This study aims to investigate a novel high-efficient antioxidant for synthetic ester oils. An ester-bridged antioxidant, phloroglucinol tris (3-[3,5-di-tert-butyl-4-hydroxyphenyl]) propionate (PTP), was successfully synthesised in high yield under relatively mild reaction conditions. Thermal stability and oxidation resistance of diisooctyl adipate (DOA) ester oil were determined and compared to the typical commercial phenol antioxidants, including its tribological properties. The results indicate that the prepared PTP antioxidant exhibits considerably higher thermal stability than commercial antioxidants, and it also improves the oxidation resistance of the synthetic ester oil more effectively. Moreover, the addition of PTP antioxidant enhanced the wear protection of DOA ester oil without deteriorating its lubricating performance. The ester-bridged antioxidant can be used as a multifunctional additive, which not only exerts excellent thermal stability and oxidation resistance, but can also act as an efficient anti-wear agent in synthetic ester oils.
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高影响因子
Lubrication Science
·
2022
·Vol. 34
·期 4
·275-289
·
IF 1.307
Jiju Guan,Jian Wu,Chao Gao,Yong Wang,Xuefeng Xu
Sulfurised isobutylene (T321) was filled into the cavity of multi-walled carbon nanotubes (MWCNTs) in order to synthesise MWCNT/T321 composites. Tribological properties of water-based nanofluids with composites as additives were systematically investigated using a four-ball configuration. The results showed that MWCNTs were filled by T321 with a filling rate of 22.5%. The nanofluids prepared by the composites produced a significantly lower coefficient of friction and wear loss, in comparison with the lubricants containing only MWCNTs or T321. Such improvement was attributed to the fact that during sliding the T321 filled into composites was released onto the rubbing surface to generate a lubricating film, resulting in a low resistance to shear, whilst the MWCNTs served as nano-bearings on the formed lubricating film.
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高影响因子
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