SCIENCE OF THE TOTAL ENVIRONMENT
·
2022
·
IF 10.753
Chenxing Li,Xiaojiao Zhou,Yangyi Xiao,Tuqiao Zhang,Miaomiao Ye
Recently, solar-driven seawater desalination based on air-water interfacial heating has triggered significant research interest due to its high water evaporation rate, high photothermal conversion efficiency, low energy consumption, simple operation and low cost. However, as the air-water interface temperature reaches as high as 40–70 °C, volatile organic compounds (VOCs) will volatilize into the condensed desalinated water and results in the polluted freshwater. In this work, anionic, cationic, and nonionic surfactants were applied for the first time to inhibit the phenolic compounds such as phenol, p -methylphenol and p -chlorophenol entering into the condensed freshwater. Results showed that the concentration of phenol could be reduced by the addition of cetyl trimethyl ammonium bromide (CTAB). The phenol's distillation concentration ratio (R D ) reduced from 76% to 35% due to the electrostatic interaction and the micellar encapsulation between the CTAB and phenol. Moreover, parameters including CTAB dose, initial phenol concentration, solar intensity, pH, and salinity that affecting the R D were also investigated. Finally, a real seawater solar-driven distillation experiment also revealed that the water quality of freshwater was improved by the addition of CTAB. This work revealed that the surfactants such as CTAB can be potentially used to inhibit VOCs entering into the condensed freshwater during solar-driven seawater distillation.
研究领域:
环境科学
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化学工程
·
水处理
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产品关联
DOI
PubMed
高影响因子
NANOTECHNOLOGY
·
2023
·Vol. 34
·期 17
·175601
·
IF 3.5
Jing Fu,Qi-Yan Lv,Yan-Shuai Li,Xiaojie Song,Qi Zhu,Xueling Ren,Hui-Fang Cui
Near-infrared (NIR) persistent luminescence nanoparticles (PLNPs) with high brightness, small sizes, good hydro-dispersivity, and intrinsic surface-functional groups are desirable in biological applications. In this work, Cr3+-doped zinc gallogermanates Zn1+xGa2−2xGexO4:Cr (ZGGC) PLNPs were hydrothermally synthesized via 3-aminopropyltriethoxysilane (APTES) as an additive, or APTES and cetyltrimethylammonium bromide (CTAB) as two co-additives. Addition of APTES not only dramatically enhances the 696 nm NIR luminescence intensity, but also obviously decreases the particle size and introduces amino groups. In particular, the x = 0.1 series ZGGC (ZGGC0.1) with the addition of n moles equivalent APTES (ZGGC0.1-nA) had smaller particle sizes than the x = 0.2 counterpart (ZGGC0.2-nA). The NIR afterglow intensities increased with the APTES introduction. The ZGGC0.2-2.5A sample (also named as ZGGC, Si, -NH2) exhibited maximum luminescence intensities both in solid and aqueous states. With APTES, Si atom is doped and –NH2 groups are modified, the trap depth and density become larger, and the afterglow intensities and decay time are significantly enhanced. More notably, co-addition of CTAB (ZGGC0.2-2.5A-C) (also named as ZGGC, Si, −NH2') further enhances hydro-dispersivity and luminescence intensity, decreases particle sizes, and results in more prominent amino groups. The trap density is drastically higher than that without CTAB (i.e. ZGGC0.2-2.5A). Change of Cr3+ microenvironment in the crystal and more defects introduction contribute to the enhanced brightness. As expected, the ZGGC,Si,-NH2' PLNPs possess excellent biocompatibility, deep tissue penetration and distinguished bioimaging properties, and rechargeability with orange LED light. The ZGGC,Si,-NH2' PLNPs should provide to be an excellent nanomaterial for various functionalization and bioimaging applications.
研究领域:
材料科学
·
生物医学工程
·
纳米技术
·
光学
·
生物学
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产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 47
·27156-27163
·
IF 10.733
Weifeng Zhang,Ruixiang Qu,Xiangyu Li,Yanan Liu,Yen Wei,Lin Feng
In the oil/water emulsion treatment field, the separation of dispersed tiny oil droplets and the removal of surfactants are both significant in order to obtain purified water. Superwetting materials have proved to be an ideal solution for stabilized emulsion separation. However, most of the previous studies only focus on the separation of oil from water while neglecting the removal of surfactants. With the purpose of realizing in situ emulsion separation and surfactant removal, a dual functional Janus membrane is designed inspired by mussel-inspired chemistry and an EDC/NHS coupling reaction. After modification, abundant amino groups and carboxyl groups are decorated on two sides of the microfiltration membrane substrate, respectively (denoted as the –NH2 side and –COOH side). Combining special wettability with electrostatic interaction, the as-prepared membrane is able to separate stabilized oil-in-water emulsions and remove anionic/cationic surfactants simultaneously. The –NH2 side is used for the treatment of anionic emulsions with the surfactant sodium dodecyl sulfate (SDS), while the –COOH side is used for the treatment of cationic emulsions with the surfactant hexadecyl trimethyl ammonium bromide (CTAB). More importantly, the separation efficiencies are all above 99.5% and the surfactant removal efficiencies are up to 95.7%. To our knowledge, this is the first time to treat both dispersed oil droplets and surfactants using superwetting materials. The excellent recyclability and stability of the Janus material make it a potential candidate for application in the industrial field.
研究领域:
环境科学
·
材料科学
·
化学工程
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DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2024
·Vol. 31
·期 2
·1-16
·
IF 2.6
Guo Liyun,Zhang Haichang,Hua Jing,Liu Jinhui
Cis-1,4 - polyisoprene latex (IRL) is the best alternative to natural rubber latex (NRL) because it is free from proteins and can avoid allergic reactions in the human body. Poor mechanical properties of IRL film are a major obstacle to replacing NRL. To address this issue, a novel strategy was developed by a simple one-pot method to prepare a composite latex introducing hexadecyltrimethylammonium bromide (CTAB) modified sodium montmorillonite (org-Mnt) into the IRL preparation process. The microstructures and morphology of the resulting org-Mnt were characterized by Fourier Transform Infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscope (SEM), and Energy Dispersive Spectrometer (EDS). In addition, the dispersion state of the org-Mnt in the composite latex and the morphology of the composite films were determined by transmission electron microscopy (TEM) and SEM. The properties of the composite latex were investigated. Crosslink density, thermogravimetric analysis (TGA), mechanical properties, and thermal oxygen aging properties of the composite latex films were also studied. Finally, the mechanism of org-Mnt reinforcement of IRL was described comprehensively. The results showed that the org-Mnt/IRL (1phr and 2phr) composite latexes had a stable state, excellent film-formation performance, and excellent mechanical properties. Compared with pure IRL films, the tensile strength of org-Mnt/IRL (2phr) composite films increased by 74%, and after thermal oxygen aging, property change rates of the tensile strength and elongation at break increased by 37.2% and 32.1%, respectively, which exceeded those of NRL. The current research provides an effective method for preparing high-performance composite films suitable for high-end medical applications.
研究领域:
高分子科学
·
材料工程
·
纳米复合材料
·
胶体与界面科学
·
生物医用材料
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DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Er-Ji Zhang,Tian-Song Deng,Yu-Chun Cheng,Li-Yong Liu,Jia-Fei Gao,Jiahong Wen,Xiaoyu Zhao,Jie Liu
Plasmonic multimetal materials, consisting of a plasmonic core and a catalytic shell in a core–shell structure, often exhibit excellent catalytic performances. Such excellent performances arise from the synergistic collaboration between the plasmonic core’s localized surface plasmon-excited hot electrons and the catalytically active sites of the catalytic shell. In this context, a trimetallic nanostructure was designed featuring gold nanobipyramids (AuNBP) with a silver–platinum alloy shell, serving as a plasmon-mediated photocatalyst for the degradation of methyl orange (MO) under visible and near-infrared light. By altering the concentrations of the surfactants hexadecyltrimethylammonium bromide (CTAB) and hexadecyltrimethylammonium chloride (CTAC), the resulting nanostructure can take on either island-like or shell-like morphology. In the model system of the photocatalytic reaction of MO, employing the synthesized nanoparticles as catalysts, the study investigated the reaction under xenon lamp illumination. The trimetallic nanostructure exhibited robust photocatalytic performances, surpassing AuNBP by a factor of 27.8. The transfer of plasmon resonance energy from AuNBP to the silver–platinum alloy layer, augmenting the generation of charge carriers, elucidates its outstanding photocatalytic performance. The obtained trimetallic nanostructure showcases promising potential applications in the realm of photocatalysis, contributing to the development of advanced plasmon-enhanced photocatalysts with enhanced efficiency and multifunctionality.
研究领域:
纳米技术
·
催化
·
材料科学
·
环境科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CATALYSIS
·
2020
·
IF 7.888
Lan Yuan,Yue-Hua Li,Zi-Rong Tang,Jinlong Gong,Yi-Jun Xu
Pairing CO 2 reduction with oxidative organic synthesis in one photoredox cycle opens a new avenue for cooperative utilization of excited electrons and holes towards efficient solar-to-chemical energy conversion. In this work, we demonstrate a facile cetyltrimethylammonium bromide (CTAB) surfactant functionalized ZnIn 2 S 4 (ZIS)-based dual-functional reaction system for efficient visible light-driven CO 2 -to-CO conversion pairing with selective oxidation of benzyl alcohol to value-added C C coupled products. Our research suggests that the markedly enhanced redox activities are mainly attributed to the unique structure of CTAB-ZIS featuring more crystalline and surface defects, which greatly promotes the interfacial charge carrier transfer, and in particular elevates CO 2 activation and electrons reducibility. It is anticipated that this work would inspire further establishment of efficient novel photocatalysts and cooperative reaction system coupling CO 2 reduction and organic synthesis in a cost-effective manner under ambient conditions to meet the economic and social sustainability goals.
研究领域:
光催化
·
太阳能转化
·
有机合成
·
环境化学
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产品关联
DOI
高影响因子
JOURNAL OF CONTROLLED RELEASE
·
2023
·
IF 10.8
Ying Chen,Sibu Wang,Qin Ma,Xingjie Wu,Qianqian Guo,Xinghong Luo,Ling Tao,Xiangchun Shen
Nanocarriers are easily captured by endosomes, where the abundant hydrolases inevitably destroy the nanocarriers and the drugs they carry, ultimately resulting in a compromised or lost therapeutic efficacy. Herein, we report a membrane-lytic mechanism-based Pickering emulsion that can in turn utilize this seemingly unfavorable endosomal capture behavior for tumor therapy. This Pickering emulsion is constructed as an oil-in-water (O/W) emulsion stabilized by the hybrid nanoparticles (HNPs) composed of two molecules with opposite charges, cetyl trimethylamine bromide (CTAB) and linoleic acid (LA), through electrostatic interaction (defined as [email protected] ). After [email protected] enters the lysosomes through macropinocytosis-mediated endocytosis, LA can be protonated in response to the acidic stimulus, and causing the swelling or disintegration of HNPs due to the disrupted electrostatic interaction. The released CTAB holds strong membrane-lytic activity and can directly damage the lysosomal membranes. Under the acidic condition and the participation of excessive iron ions (II) in lysosomes, LA induces lipid peroxidation and the resulting lipid peroxides (LPO) will oxidize the lysosomal membranes, collectively causing the leakage of lysosome membranes and the release of contents into cytoplasm. Subsequently, the diffused CTAB and LPO will continue to attack the mitochondrial membranes and cell membranes , resulting in the death of different types of tumor cells both in vitro and in vivo due to membrane damage. This Pickering emulsion with membrane-lytic ability represents a potential self-anticancer nanocarrier.
研究领域:
药学
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纳米技术
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癌症治疗
·
生物医学工程
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产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2016
·Vol. 23
·期 19
·19450-19460
·
IF 2.76
Zhou Qiongzhi,Li Feng,Ge Fei,Liu Na,Kuang Yangduo
Toxicants are generally harmful to biotechnology in wastewater treatment. However, trace toxicant can induce microbial hormesis, but to date, it is still unknown how this phenomenon affects nutrient removal during municipal wastewater treatment process. Therefore, this study focused on the effects of hormesis induced by cetyltrimethyl ammonium bromide (CTAB), a representative quaternary ammonium cationic surfactant, on nutrient removal by Chlorella vulgaris F1068. Results showed that when the concentration of CTAB was less than 10 ng/L, the cellular components chlorophyll a , proteins, polysaccharides, and total lipids increased by 10.11, 58.17, 38.78, and 11.87 %, respectively, and some enzymes in nutrient metabolism of algal cells, such as glutamine synthetase (GS), acid phosphatase (ACP), H + -ATPase, and esterase, were also enhanced. As a result, the removal efficiencies of ammonia nitrogen (NH 4
+ ) and total phosphorus (TP) increased by 14.66 and 8.51 %, respectively, compared to the control during a 7-day test period. The underlying mechanism was mainly due to an enhanced photosynthetic activity of C. vulgaris F1068 indicated by the increase in chlorophyll fluorescence parameters (the value of Fv / Fm , ΦII, Fv / Fo , and rETR increased by 12.99, 7.56, 25.59, and 8.11 %, respectively) and adenylate energy charge (AEC) (from 0.68 to 0.72). These results suggest that hormesis induced by trace toxicants could enhance the nutrient removal, which would be further considered in the design of municipal wastewater treatment processes.
The schematic mechanism of C. vulgaris F1068 under CTAB induced hormesis. Green arrows ( ) represent the increase and the red arrow ( ) represents the decrease.
研究领域:
环境科学
·
微生物学
·
生物技术
·
废水处理
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产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2018
·
IF 2.829
Yue Zhang,Caili Dai,Yao Qian,Xiqun Fan,Jianfeng Jiang,Yining Wu,Xuepeng Wu,Yongping Huang,Mingwei Zhao
A novel nanoparticle-enhanced VES fracturing system was proposed based on the conventional viscoelastic surfactant (VES) fracturing fluid composed of cetyltrimethylammonium bromide (CTAB) and sodium salicylate (NaSal). Hydrophilic silica nanoparticles were used as the addition agent in this system for enhancing properties of VES fracturing fluid. The formation of wormlike micelles by CTAB and NaSal was investigated by cryogenic transmission electron microscopy (cryo-TEM). Rheological properties of the nanoparticle-enhanced VES fracturing system were discussed in detail. With the addition of nanoparticles, the nanoparticle-enhanced VES fracturing system has higher viscosity and viscoelasticity than conventional VES fracturing fluid without nanoparticles. Constant shearing and variable shearing measurements showed the shear-resistant and restoration properties of nanoparticle-enhanced VES fracturing system. This enhancement was due to the formation of newly micelle-nanoparticle junctions and a mechanism was proposed. Formation dynamic filtration damage (DFD) measurement was conducted to study damage effects of the nanoparticle-enhanced VES fracturing system on the core. In addition, cores before and after DFD were characterized by scanning electron microscopy (SEM), showing the formation of nano-filter cake. The contact angle of water on the core surface decreased after DFD, showing stronger hydrophilicity . This work could further develop the application of nanotechnology and colloid on reservoir fracturing system.
研究领域:
石油工程
·
纳米技术
·
胶体科学
·
材料科学
✓ 已验证
DOI
高影响因子
CATALYSIS LETTERS
·
2023
·
IF 2.8
Hao Runming,Du An,Zhu Qingling,Wu Xue,Liu Sijia,Wang Ke,Wang Yang
5-Hydroxymethylfurfural (HMF) is a high value-added platform compound, converted into bio-based polyesters and biofuels etc. In this paper, we used two commercially available hexamethylenimine and cetyltrimethylammonium bromide (CTAB) as the structure-directing agents to synthesize HMWW zeolite nanosheets via one step. A series of HMWW zeolite nanosheets with different disorder index ( DI ) were controllably prepared by adjusting the amount of CTAB, operating also as an in situ exfoliating agent, converting fructose into HMF in the tetrahydrofuran/NaCl-H 2 O biphasic solvent with low boiling point. Successful construction of disordered HMWW zeolite nanosheets was verified by PXRD. Further characterizations by BET, SEM and TEM etc. show that HMWW 4.0 with the optimum DI of 0.67 has a disordered network-like arrangement of layers with the external surface area of 224 m 2 /g and the mesoporous size of 3.5 nm. Catalytic evaluations showed that HMF selectivity was closely related to DI of the catalysts. Under the optimized DI , fructose molecules are readily accessible to acidic sites on the external surface while larger external surface area is exposed. The HMWW 4.0 zeolite catalyzed fructose dehydration in the biphasic solvent, producing 90% HMF selectivity with 93% fructose conversion at 140 °C for 6 h. In the reuses of the HMWW 4.0 catalyst, HMF selectivity was around 90% with fructose conversion decreasing by ca. 10% after six runs, indicating that it possesses the promising stability. Graphical Abstract
研究领域:
化学
·
材料科学
·
催化
·
纳米技术
·
生物化学
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
·
2023
·
IF 4.6
Liang Liu,Yunxin Chen,Chunxia Zhao,Min Guo,Yuanpeng Wu,Yuntao Li,Dong Xiang,Hui Li,Li Wang,Xiaoyan Zhang
Traditional hydrogel-based strain sensors do not work well under water due to extreme swelling and poor adhesion to substrates in water-rich conditions. Inspired by the jellyfish tentacles, a super stretchable dual crosslinked hydrogel was prepared as a motion sensor underwater. The hydrogel contained a cationic surfactant , hexadecyl trimethyl ammonium bromide (CTAB), that crosslinked with hydrophobic lauryl methacrylate (LMA) units in an AA-LMA copolymer . Al 3+ ions also coordinated with carboxyl groups in PAA chains and amino groups on chitosan (CS) to form ionic crosslink points. The formed hydrogel exhibited excellent anti-swelling characteristics, superior tensile properties (≈3000%), and rapid self-healing performance. Due to the complementary effects of electrostatic interactions and dynamic chemical bond formation, the hydrogel efficiently and repeatably adhered to various biological tissues, such as hogskin and shrimp, in aquatic environments. Moreover, the hydrogel-based strain sensor showed high sensitivity (GF = 2.04) over a wide sensing range from 0 to 1000% strain with high stability in air and water. The prepared materials' unique performance further expands their application prospects in flexible wearable devices , anti-counterfeiting recognition, and other fields in environmental conditions.
研究领域:
材料科学
·
生物医学工程
·
可穿戴技术
·
传感技术
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2020
·
IF 4.469
Chen Hua,Kaimin Chen,Zun Wang,Xuhong Guo
Cationic latexes have received wide attention due to their special properties and potential applications in wood coatings, fabric treatment, etc. However, the practical application of cationic latexes was hindered due to their poor stability, especially the alkali resistance stability. In this work, various stable cationic polyacrylate latexes were prepared by an efficient route. Three cationic comonomers, i.e., methacrylatoethyl trimethyl ammonium chloride (DMC), 2-(dimethylamino)ethyl methacrylate (DMAEMA), and 2-aminoethyl methacrylate hydrochloride (AEMH), were used in the aqueous semi-continuous seeded emulsion polymerization of methyl methacrylate (MMA) and butyl acrylate (BA) using cetyl trimethyl ammonium bromide (CTAB) and 2,2′-azobis[2-(2-imidazolin-2-yl)propane] dihydrochloride (AIBI) as the cationic emulsifier and initiator, respectively. The alkali resistance of the latex could be significantly improved by the addition of cationic monomer DMC and be simply tuned by adjusting DMC dosage. The improved stability of the latex might originate from the higher charge density on the surface of the latex by the introduction of DMC. Moreover, the effects of initiator dosage, emulsifier dosage and different cationic comonomers on the latex preparation and the film properties were also systematically investigated. This work not only introduces an efficient route to prepare cationic latexes with superior stability, but also paves the way for latexes to be used in applications such as textile finishing, paper industry, and biomedical field, etc.
研究领域:
材料科学
·
化学工程
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）