JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2023
·
IF 4
Ting Zhao,Han Zhang,Hai-Hong Zhang,De-Qiang Yi,Jian-Feng Zhu,Yi Qin
The rapid development of communications technology has exacerbated the deterioration of the electromagnetic environment and therefore there is an urgent need to develop efficient electromagnetic wave absorbing materials. Based on the idea of constructing the ferrite-alloy-glass multiphase heterogeneous microstructure, core-shell-like NiFe 2 O 4 /Ni 3 Fe/LAS nanocomposites has been successfully prepared by using sol-gel, hydrothermal and in situ reduction methods. In which, NiFe 2 O 4 and Ni 3 Fe provide strong magnetic and dielectric losses , while the introduction of the LAS (Lithium aluminum silicate, Li 2 O–Al 2 O 3 –SiO 2 glass) wave-transparent phase modulates the complex dielectric constant, and effectively improving impedance matching. The multi-component nature of NiFe 2 O 4 /Ni 3 Fe/LAS produces abundant heterogeneous interfaces, and the strong interfacial polarization contributes to the attenuation of electromagnetic waves. At the thickness of 2.3 mm, the reflection loss (RL) of NiFe 2 O 4 /Ni 3 Fe/LAS reaches −50.7 dB at 11.36 GHz with an effective absorption bandwidth (EAB) of 5.04 GHz, while at 2.0 mm the EAB is up to 7 GHz. Importantly, the NiFe 2 O 4 /Ni 3 Fe/LAS nanocomposites achieve effective absorption (RL < −10 dB) in the C, X and Ku bands (5–18 GHz). This work is expected to offer prospects for high-performance and ultra-broadband composite microwave-absorbing materials.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NON-CRYSTALLINE SOLIDS
·
2024
·
IF 3.2
Shuo Tian,Man Zhou,Hao Yang Shen,Jun Jie Huang,Hao Zhang,Kai Ge Liu,Bin He,Ling Bing Kong
Li 2 O–Al 2 O 3 –SiO 2 (LAS) glass-ceramics have been explored for nearly 80 years, due to their special properties, such as low/negative thermal expansion and high ionic conductivity, thus having commercial significance in various fields. In this study, LAS glass-ceramics based on petalite crystals were developed, which have promising mechanical, thermal properties and compactness, making them potential for applications in hollowwares, tablewares, containers, and plate glass industries. With given ratios of Al 2 O 3 /SiO 2 , the crystalline phase is mainly affected by the concentration of Li 2 O, where the content of Li 2 O must be sufficiently low to form petalite LiAlSi 3 O 8 , thereby avoiding the formation of spodumene LiAlSi 2 O 6 . For this reason, CaF 2 was selected as a nucleating agent to increase the crystallinity of petalite, while the crystallization behavior of LiAlSi 3 O 8 crystals was analyzed in detail. The average transmittance of 3.0 ± 0.2 mm thick glass-ceramics in the visible light region and infrared light region (400–1200 nm) is higher than 85 %. After crystallization at about 770 °C, the crystal size in the glass-ceramics is 100–200 nm, which is relatively dense and has excellent near-zero expansion coefficient. The minimum CTE (25–325 °C) is 1.0992 ppm/ °C, while the mechanical properties such as Vickers hardness, elastic modulus and flexural strength are significantly improved.
研究领域:
材料科学
·
无机非金属材料
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2019
·
IF 7.65
Nan Hu,Yanfei Li,Chunyan Yang,Zhaoliang Wu,Wei Liu
Linear alkylbenzene sulfonate (LAS) is a particular member of the emerging contaminants, because of its increasingly ubiquitous use and tremendous harm to the environment and wastewater treatment plant. Herein, we develop a novel two-stage foam separation to recover LAS (18.7–91.0 mg/L) from laundry wastewater. We first reported the fabrication of activated silica nanoparticle (SNP) via a facile and scalable in-situ approach. To obtain a desirable surface property, the key design element was the utilization of amphoteric surfactant, viz. cocamidopropyl betaine, as the modifier. In the first-stage, activated SNP could serve as an efficient foam stabilizer to improve the foam stability and the interfacial adsorption of LAS. Remarkably, LAS concentration in effluent decreased to very low levels of 1.9–2.9 mg/L with a proper enrichment ratio, and met the emission standard. In the second-stage, we originally adopted the intensification of liquid drainage to selectively recycle activated SNP from LAS. An inclined foam channel (IFC) covered by hydrophobic coating was constructed and the maximum recovery percentage of SNP reached 91.5%, indicating that the activated SNP was recyclable. This work definitely proves that the integration of nanotechnology in foam separation can make wastewater treatment more efficient and less expensive.
研究领域:
环境科学
·
纳米技术
·
废水处理
✓ 已验证
DOI
PubMed
高影响因子
ENERGY
·
2022
·
IF 8.857
Chen Shi,Xiangrong Liu,Hao Wu,Shunsheng Zhao,Zaiwen Yang
The use of surfactant to enhance the efficiency of coal biodegradation is a promising technology. In this paper, the effects of nonionic-anionic mixed surfactants TR-LAS and TW-LAS on Wucaiwan coal degradation by Nocardia mangyaensis ( N. mangyaensis ) were investigated, in which TR (octyl phenoxy poly ethoxy) and TW (polysorbate) were nonionic surfactants, and LAS (sodium dodecyl benzene sulfonate) was anionic surfactant . The results demonstrated the enhancement order of surfactant was TR-LAS > TW-LAS > TR > TW > LAS, and when the total mass of TR-LAS was 1000 mg/L and its ratio was 1200:800 ( m/m ), and the maximum biodegradation rate of Wucaiwan coal was 74.8% which increased by 23.6% than the control group (without surfactant). It was also found that nonionic surfactant TR was more effective than TW and LAS in promoting the growth of N. mangyaensis , meanwhile anionic surfactant LAS was more effective than TR and TW in increase the zeta potential of oxidized coal. The increase of bacterial growth will secrete more coal-degrading alkaline protease, and the increase of coal zata potential will make bacteria and coal contact easier, both of the above actions are conducive to biodegradation of coal. Thus, the mixed surfactants TR-LAS (1000 mg/L) achieved the strongest synergistic effect of nonionic and anionic surfactants, greatly promoting the biodegradation of coal. This study provides valuable information in designing the mixed surfactant to improve the efficiency of coal biodegradation process .
研究领域:
微生物学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
·
2018
·
IF 1.454
Xiu-mei Tai,Jin-yu Song,Zhi-ping Du,Xiaoying Liu,Tianzhuang Wang,Guoyong Wang
Hydrolytic stability, foaming power and foam stability, calcium soap dispersing ability and stability in hard water of fatty acid methyl ester sulfonate (MES) were measured by potentiometric titration, Ross-Miles foam instrument, improved acid titration and turbidimetric test, respectively. The dishwashing detergent formulations containing MES were designed and stability and detergency of dishwashing detergents have been tested. The results showed that when storage temperature was 45°C, MES in pH 4.5 ∼ 9 was stable, disodium α-sulfonated fatty acid esters content increased at pH 10, hydrolysis rate was accelerated; foaming power of MES was lower than sodium linear alkyl benzene sulfonate (LAS) and the foam stability was equivalent to that of LAS; MES showed very excellent calcium soap dispersing ability, calcium soap dispersing amount of MES was 2.5 g calcium soap /1 g MES and LAS was 0.34 g /1 g LAS; differential stability of MES in hard water was , and LAS was ; the performance test results of dishwashing detergent products partially substituted LAS by MES can both meet the requirements of the Chinese national standard.
研究领域:
化学工程
·
表面活性剂科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Chenyao Chen,Yuchan Liu,Wenjing Gao,Huihuan Ouyang,Rongkai Ye,Jianqiang Hu
Conventional rechargeable zinc–air batteries (RZABs) are largely hindered by the sluggish reaction kinetics of oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) at the air cathode. Therefore, the rational design of highly active bifunctional electrocatalysts is crucial for advancing performance of the energy storage system. In this study, we synthesized uniform porous LaS/CoS2 heterojunction nanorods, in which LaS was introduced into transition metal sulfide to construct abundant sulfur vacancies and well-defined heterointerfaces. This not only effectively regulated the electronic structure of the LaS/CoS2 heterojunctions but also significantly enhanced their bifunctional catalytic activity, which possessed an ORR/OER voltage gap of as low as 0.72 V. The RZAB assembled with LaS/CoS2 as an air cathode had a high peak power density of ca. 190 mW cm–2, stable open-circuit voltage of ca. 1.54 V, and remarkable specific capacity of ca. 801.7 mAh gZn–1. The RZAB device maintained stable charge–discharge cycling over 480 h with negligible performance degradation, surpassing the performance of conventional Pt/C and RuO2-based counterparts across multiple evaluation metrics. This work elucidated the synergistic effect between sulfur vacancies and heterojunction interfaces and mechanistic insight into their role in promoting electrocatalytic activity. These findings provide a promising strategy for the design of efficient and durable bifunctional catalysts for next-generation metal–air batteries.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Zheng-Zhe Zhang,Yu Zhang,Ya-Fei Cheng,Ren-Cun Jin
The increase of emerging contaminants, such as surfactants, is one of the major challenges to biological wastewater treatment. However, the potential impact of linear alkylbenzene sulphonates (LAS), a major class of anionic surfactants, on anammox process is unclear. The long-term effects of sodium dodecyl benzene sulfonate (SDBS, as a model LAS) on reactor performance, microbial community and sludge properties were investigated in this study. The presence of 5 mg L −1 SDBS promoted the release of extracellular microbial products from anammox granules and the wash-out of anammox population via effluent. Despite sludge disaggregation, the reactor performance was robust to the exposure of 5 mg L −1 SDBS due to functional redundancy. With the further increase of SDBS to 10 mg L −1 , the metabolic activity of anammox biomass and the transcription and post-translation of hydrazine dehydrogenase were significantly decreased. The potential mechanism might be associated with the damage on cell membrane that induced the leakage of intracellular matrix. These results highlight the need to consider the potential risk of LAS to operation of anammox process in biological wastewater treatment plant.
研究领域:
环境工程
·
微生物学
·
水处理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Ting Zhao,Zhiyuan Liu,Shaowei Li,Zhaoqi Hu,Jinxiao Hou,Shaojun Yan,Jianfeng Zhu,Yi Qin
Lithium aluminosilicate (LAS) glass-ceramics are widely recognized for their low thermal expansion, good chemical stability, and favorable mechanical strength. However, their inherent low fracture toughness restricts applications in high-performance components. To address this, we propose a homogeneous fiber-toughening strategy by incorporating structurally compatible LiAlSi 2 O 6 nanofibers as a well-dispersed reinforcing phase to enhance the performance of LAS glass-ceramics. LiAlSi 2 O 6 gel fibers were successfully prepared via sol-gel-assisted electrospinning, based on the formation of Si-O-C covalent bonds between PVA and polysilicic acid. And it was found that under the optimized conditions of a PVA content of 10 wt%, a heating rate of 1 °C/min, and a sintering temperature of 850 °C, the well-dispersed and high density nanofibers could be obtained. By introducing 5 wt% of this fiber into the LAS sol-gel powder, the composite materials were successfully prepared through hot-pressing sintering, and the influence of sintering temperature on their mechanical properties was systematically studied. The composite containing 5 wt% fibers sintered at 950 °C (Z4) exhibited the optimal combination of mechanical performance, with a flexural strength of 167±8.29 MPa, a fracture toughness of 4.46±0.15 MPa·m 1 / 2 , and a Vickers hardness of 9.3±0.48 GPa. Notably, the fracture toughness was enhanced by 44% compared to the fiber-free baseline. This significant enhancement is attributed to the strong interfacial bonding between the fibers and the matrix, combined with the fiber pull-out mechanism. The developed homogeneous fiber-toughening strategy proves highly effective for achieving high-performance LAS glass-ceramics.
✓ 已验证
产品关联
DOI
高影响因子
CELLULOSE
·
2019
·Vol. 26
·期 18
·9863-9875
·
IF 3.917
Wang Jinran,Wan Jinquan,Ma Yongwen,Wang Yan
Abstract The deinking of mixed office waste paper by cellulase, M/Las (modification of laccase aspartic acid system), and C-M/Las (cellulase synergistic modification of laccase aspartic acid system) was investigated. The fiber morphology parameters, hydrogen bond patterns, cellulose crystallinity, and fiber microstructure were observed via fiber quality analyzer (FQA), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and scanning electron microscopy (SEM). The results showed that the effective residual ink concentration of enzyme deinked pulp decreased compared with blank pulp (pulp without enzymatic treatment). The deinking efficiencies of C-M/Las, cellulase, and M/Las were 18.17%, 14.01%, and 12.31%, respectively. FQA analysis indicated that the fiber length and curl index decreased, while the fiber width slightly increased. FTIR analysis revealed that after cellulase, M/Las, and C-M/Las treatment, the content of intermolecular hydrogen bonds increased by 14.65%, 13.37%, and 19.80%, respectively. This indicates that there is a synergistic effect between cellulase and M/Las. XRD showed that the cellulose crystallinity decreased after enzymatic deinking. SEM micrographs of fibers treated with enzymes revealed that the fiber surface became rough and more fibrils appeared. The water retention value was increased after enzymatic deinking. Graphic abstract
研究领域:
制浆造纸技术
·
生物技术
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Sugui Fang,Li Fan,Yulian Niu,Guoshuai Jiao,Haidong Jia,Feng Wang,Haifeng Yang,Yan Kang
Pesticide residues on vegetables could be removed by commercial detergents to guarantee food safety, but the removal efficiencies of different formulations of detergents need to be further investigated. In this work, surface enhanced Raman scattering (SERS) imaging method due to its good space resolution as well as high sensitivity is used to track the thiram residue, and evaluate the pesticide removing efficiencies by mixtures of several surfactants at different ratios. Sodium linear alkylbenzene sulphonate-alkyl glycoside (LAS-APG) with the ratio at 5:5 and the concentration at 0.2 % show the best removing effect. In addition, HPLC method is employed to validate the results of SERS imaging. Furthermore, LAS-APG mixture could be efficiently washed out from the leaves through simple household cleaning, meaning no secondary contamination. It is perspective that SERS imaging is an effective technique to explore the effect of fruit and vegetable detergents in removing pesticide residues.
研究领域:
食品安全
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2024
·
IF 4.1
Xiaohong Wang,Jialian Li,Chen Chen,Xu Li,Lei Liu,Jinxiang Dong
Benzene sulfonate surfactants are crucial anionic surfactants, commonly derived from petrochemical sources. Herein, we present a new method for synthesizing alkyl-tetralin sulfonate anionic surfactants using α-olefins (n-hexene, n-octene, n-decene) and tetralin sourced from the coal chemical industry as raw materials. The three-resulting alkyl-tetralin sulfonates (C6-THNS, C8-THNS and C10-THNS), obtained by alkylation and sulfonation of tetralin were characterized through HPLC, FTIR, LCMS and 1 H NMR techniques. Their surfactant properties were also investigated and compared with commercially applied linear alkylbenzene sulfonate (LAS). We observed that C6 alkyl-tetralin sulfonate (C6-THNS) exhibited smaller critical micelle concentration ( CMC =0.60 mM) and lower equilibrium surface tension ( γ CMC =33.43 mN/m). Similarly, C6-THNS also showed comparable foaming, wetting and emulsifying properties with LAS, which can be used as a substitute for LAS surfactants. This study shows that the synthesized alkyl-tetralin sulfonates is a potential surfactant, providing a route for efficiently using coal-based chemicals to synthesize surfactants.
研究领域:
化学工程
·
表面活性剂合成
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Jing Wang,Dian Jiao,Siliang Yuan,Han Chen,Jingcheng Dai,Xin Wang,Yao Guo,Dongru Qiu
Linear alkylbenzene sulfonate (LAS) is one of the most widely used anionic surfactants and a common toxic pollutant in wastewater. This study employed high throughput sequencing to explore the microbial community structure within activated sludge exposed to a high concentration of LAS. Genera such as Pseudomonas , Aeromonas, Thauera and Klebsiella exhibited a significant positive correlation with LAS concentrations. Furthermore, Comamonas and Klebsiella were significantly enriched under the stress of LAS. Moreover, bacterial strains with LAS-degrading capability were isolated and characterized to elucidate the degradation pathways. The Klebsiella pneumoniae isolate L1 could effectively transform more than 60 % of 25 mg/L of LAS within 72 h. Chemical analyses revealed that L1 utilized the LAS sulfonyl group as a sulfur source to support its growth. Genomic and transcriptomic analyses suggested that strain L1 may uptake LAS through the sulfate ABC transport system and remove sulfonate with sulfate and sulfite reductases.
研究领域:
环境微生物学
·
废水处理
·
生物降解
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）