JOURNAL OF NANOPARTICLE RESEARCH
·
2015
·Vol. 17
·期 10
·1-11
·
IF 2.184
Hu Nan,Li Rui,Wu Zhao-liang,Huang Di,Li Hong Zhen
Foam flotation is a promising technique for recovering nanoparticles from their highly diluted suspensions. In this work, a novel S type internal was developed to intensify the foam flotation of CuO nanoparticles (357.6 nm in average particle size) from their suspension of 6.2 × 10 −2 mmol/L. By enhancing foam drainage, the S type internal increased the enrichment ratio of CuO nanoparticles by 139.3 ± 12.5 % without significantly affecting their recovery percentage. Under the optimal conditions of Cetyl trimethyl ammonium bromide (CTAB) concentration 0.45 mmol/L, superficial airflow rate 2.6 mm/s, and volumetric feed rate 1.0 mL/min, the enrichment ratio and recovery percentage of CuO nanoparticles reached 81.6 ± 4.1 and 95.4 ± 4.9 %, respectively, using the foam flotation column with the S type internal. Furthermore, about 95 % CTAB could be recycled by recovering CTAB from the foamate and the residual solution. The recovered CuO nanoparticles were associated with CTAB molecules, so they had better dispersity and dispersion stability than the starting CuO nanoparticles. Therefore, they would have good reusability.
研究领域:
化学工程
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纳米技术
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材料科学
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环境工程
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产品关联
DOI
高影响因子
Scientific Reports
·
2024
·Vol. 14
·期 1
·1-8
·
IF 3.8
Li Xiaolu,Zhao Zhongtao,Deng Yufeng,Ouyang Dongsheng,Yang Xianfeng,Chen Shuguang,Liu Peng
Tin dioxide is regarded as an alternative anode material rather than graphite due to its high theoretical specific capacity. Modification with carbon is a typical strategy to mitigate the volume expansion effect of SnO 2 during the charge process. Strengthening the interface bonding is crucial for improving the electrochemical performance of SnO 2 /C composites. Here, SnO 2 -embedded reduced graphene oxide (rGO) composite with a low graphene content of approximately 5 wt.% was in situ synthesized via a cetyltrimethylammonium bromide (CTAB)-assisted hydrothermal method. The structural integrity of the SnO 2 /rGO composite is significantly improved by optimizing the Sn–O–C electronic structure with CTAB, resulting a reversible capacity of 598 mAh g −1 after 200 cycles at a current density of 1 A g −1 . CTAB-assisted synthesis enhances the rate performance and cyclic stability of tin dioxide/graphene composites, and boosts their application as the anode materials for the next-generation lithium-ion batteries.
研究领域:
材料科学
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电化学
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纳米技术
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能源存储
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DOI
高影响因子
CORROSION SCIENCE
·
2018
·
IF 4.862
Jun-Bo Xu,Yun-Qing Cao,Lu Fang,Ji-Ming Hu
We present a simple one-step method of preparing inhibitor-loaded mesoporous silica nanocontainers without extra steps such as template removal or inhibitors loading. The synthetic method is based on the high solubility of organic inhibitors in hydrophobic cores of template micelles. The resultant inhibitor (benzotriazole) and cetyltrimethyl ammonium bromide (CTAB) co-loaded silica nanocontainers had high uptake of inhibitor (∼16 wt.%) and possessed H + ion-responsive inhibitor release property. When examined by scanning vibrating electrode technique, the coating doped with these nanocontainers exhibits effective corrosion protection property. These results suggest that the one-step synthetic method was efficient, energy-saving and organic solvents-free among others.
研究领域:
材料科学
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化学工程
·
腐蚀科学
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产品关联
DOI
高影响因子
Catalysis Science & Technology
·
2017
·Vol. 7
·期 6
·1415-1422
·
IF 5.773
Zheng Chen,Hongyan Pan,Qian Lin,Xin Zhang,Sheng Xiao,Shun He
Pd core–silica shell catalysts (PdX@SiO2, X = KBr, CTAB, SC) were prepared with and without the addition of three different functional molecules, potassium bromide (KBr), cetyltrimethyl ammonium bromide (CTAB) and sodium citrate dihydrate (SC), by the reverse micelle method, and then characterized by TEM, XRD, EDS, XPS and N2 adsorption/desorption. Results showed that the addition of functional molecules decreased the Pd particle size of the catalysts, and Br− of KBr and CTAB were selectively adsorbed on the surface of Pd particles. Among the prepared catalysts, the catalyst PdKBr@SiO2 had the highest H2O2 selectivity (98%) and productivity (716 mmol gPd−1 h−1). Compared with the catalyst Pd@SiO2 prepared without any additional functional molecules, whose H2O2 selectivity and productivity were 26% and 396 mmol gPd−1 h−1, respectively, the H2O2 selectivity and productivity of the catalyst PdKBr@SiO2 were 277% and 81% higher, respectively, than those of the catalyst Pd@SiO2. The reason for this was that the Br− of KBr can be easily selectively adsorbed on the coordinatively unsaturated sites of the Pd particle surface, which could decrease the energy of the Pd surface and restrain side reactions by inhibiting the O–O bond cleavage of O2 and H2O2. And the catalyst PdKBr@SiO2 has better stability and recyclability than the conventional supported catalyst Pd/SiO2. In contrast, the catalyst PdSC@SiO2 had the lowest H2O2 selectivity (23%) and productivity (395 mmol gPd−1 h−1) because the catalyst PdSC@SiO2 prepared with the functional molecule SC and without Br− had the smallest Pd particle size, which can lead to more coordinatively unsaturated sites and increase side reactions.
研究领域:
催化化学
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材料科学
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DOI
高影响因子
NANOTECHNOLOGY
·
2024
·Vol. 36
·期 6
·065101
·
IF 2.9
Xu Chen,Jian Yue,Xiongjun Xu,Jiajun Chen,Xuechan Huang,Yukai Huang,Yang Yang,Feng Li,Tianwang Li
Selenium-based nanoparticles exhibit antiviral activity by directly modulating immune function. Despite recent promising developments in utilizing selenium nanoparticles (Se NPs) against viral infections, the impact of surface ligand charge on the conformation and interaction with viral proteins, as well as the effectiveness of Se NPs in anti-Herpes simplex virus 1 (HSV-1) infection remains unexplored. In this study, three types of selenium nanoparticles (CTAB-Se, PVP-Se, SDS-Se) with distinct surface charges were synthesized by modifying the surface ligands. We found that apart from differences in surface charge, the size, morphology, and crystal structure of the three types of Se NPs were similar. Notably, although the lipophilicity and cellular uptake of SDS-Se with a negative charge were lower compared to positively charged CTAB-Se and neutrally charged PVP-Se, SDS-Se exhibited the strongest protein binding force during interaction with HSV-1. Consequently, SDS-Se demonstrated the most potent anti-HSV-1 activity and safeguarded normal cells from damage. The mechanistic investigation further revealed that SDS-Se NPs effectively inhibited the proliferation and assembly of HSV-1 by powerfully suppressing the key genes and proteins of HSV-1 at various stages of viral development. Hence, this study highlights the significant role of surface ligand engineering in the antiviral activity of Se NPs, presenting a viable approach for synthesizing Se NPs with tailored antiviral properties by modulating surface charge. This method holds promise for advancing research on the antiviral capabilities of Se NPs.
研究领域:
纳米技术
·
病毒学
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材料科学
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免疫学
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药学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Jingshuang Zhang,He Ding,Yixiao Zhang,Chuan Yu,Peng Bai,Xianghai Guo
Hierarchical aluminosilicate zeolites were simply synthesized by a temperature-gradient strategy using conventional CTAB as single structure directing agent. The as-synthesized zeolites were composed of an ordered two-dimensional hexagonal mesopores and crystallized MFI structure. Catalytic performance of the hierarchical aluminosilicate zeolites were explored by the Claisen-Schmidt condensation of bulky reactants (benzaldehyde and 2′-hydroxyacetophenone). The reaction results showed that the hierarchical zeolites exhibit outstanding catalytic performance with a conversion as high as 73%, which may be attributed to the combined advantage of framework acidity of zeolite and the significantly improved large molecule diffussion in mesoporosity. The higher hydrothermal stability and catalytic stability than those of MCM-41 samples were proved, which were ascribed to the presence of crystallized MFI structure.
研究领域:
化学
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催化
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材料科学
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DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2021
·
IF 10.618
Jiantao Ping,Lubin Qi,Quanbo Wang,Shuhua Liu,Yifei Jiang,Li Yu,Jin-Ming Lin,Qiongzheng Hu
The abnormal levels of trypsin in biological fluids can cause some acute illnesses, such as acute pancreatitis, cystic fibrosis and malnutrition. In this paper, we report the development of an integrated liquid crystal (LC) sensing device for simple, rapid and sensitive detection of trypsin assisted by the surfactant-embedded smart hydrogel. The gelatin hydrogel mixed with CTAB is added into the side channel of the LC sensing device. In the presence of trypsin, the gelatin hydrogel is decomposed, which triggers instant release of CTAB into the aqueous solution. The CTAB molecules are then captured by the LCs and form CTAB monolayers at the aqueous/LC interface, which leads to change of the LC images from the bright to the dark appearance under the crossed polarizers. The integrated LC sensing device has a remarkable detection limit of 3.4 × 10 −5 mg/mL. It is successfully employed to single-step detection of trypsin in human serum within 30 min. The integrated LC sensing device with use of the surfactant-embedded hydrogel takes advantages of single-step detection, high portability, remarkable sensitivity and fast response time, which provides a new perspective to facilitate development of user-friendly LC-based sensors.
研究领域:
生物医学工程
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分析化学
·
生物传感器
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产品关联
DOI
PubMed
高影响因子
AUSTRALIAN JOURNAL OF CHEMISTRY
·
2020
·Vol. 74
·期 4
·261-267
·
IF 1.073
Chaoqiang Pan,Jianmin Qiu,Lumei Wang,Zhiyu Yan,Weiwen Huang,Dongwei Zhang,Xuejia Zhan,Guoqing Shen,Chaoqiang Pan,Jianmin Qiu,Lumei Wang,Zhiyu Yan,Weiwen Huang,Dongwei Zhang,Xuejia Zhan,Guoqing Shen
This paper proposes a colorimetric aptasensor for the detection of testosterone (TES) in environmental water, using TES-specific aptamer (apT5) as a sensing probe, gold nanoparticles (AuNPs) as indicator, and hexadecyltrimethylammonium bromide (CTAB) as inducer, respectively. Based on competition between TES and CTAB for apT5, the aptamer can form an aptamer–TES complex, leaving CTAB free to aggregate AuNPs in the presence of TES. Dispersed and aggregated AuNPs have different absorption wavelengths and the signal of absorption intensity is associated with the concentration of TES, so TES can be detected quantitatively based on the signal absorption intensity. This sensitive aptasensor for TES detection has a wide linear range (R = 0.998) from 1.91–800 nM and a limit of detection (LOD) of 1.91 nM. In addition, this aptasensor has high selectivity over some interferents. The method detects TES in tap water samples with recoveries in the range of 98.9–102.6 % (RSD ≤ 7.35 %). This biosensor presents a good and potential application to rapidly detect TES in actual environmental water samples.
研究领域:
分析化学
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环境科学
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纳米技术
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生物传感器
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Qian Li,Xiaoyang Yu,Jin Lin,Ke Qiu,Huan Li,Shouxiang Lu
The effect of carboxylated cellulose nanofiber (CCNF) on the firefighting foam stability and stabilization mechanism is investigated. The results show that equilibrium surface tension of CTAB/FC1157 solution decreases when CCNF concentration increases to 0.5 wt%, while CCNF has little effect on that of SDS/FC1157 solution. Besides, when CCNF concentration increases to 1.0 wt%, the foam initial drainage of SDS/FC1157 solution is delayed for about 3 min. Increasing CCNF concentration can slow down foam coarsening process and liquid drainage process of SDS/FC1157 and CTAB/FC1157 solutions, improving the foam stability. The foam stability enhancement of CTAB/FC1157-CCNF solution is due to the formation of bulk aggregates and the increase of viscosity. However, the foam stability enhancement of SDS/FC1157-CCNF solution may be caused by the increase of viscosity. CCNF significantly reduces the foaming ability of CTAB/FC1157 solution when CCNF concentration is >0.5 wt%. Nevertheless, the foaming ability of SDS/FC1157 solution decreases significantly when CCNF concentration reaches 3.0 wt%, and its foaming ability remains higher than CTAB/FC1157 solution. The foaming ability of SDS/FC1157-CCNF solution is mainly dominated by viscosity, while that of CTAB/FC1157-CCNF solution is dominated by viscosity and adsorption kinetics . Adding CCNF is expected to enhance the stability of firefighting foam and increase the efficiency of extinguishing fire.
研究领域:
材料科学
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化学工程
·
消防安全
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产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 26
·12323-12333
·
IF 9.931
Yangyi Sun,Min Chen,Limin Wu
Hollow periodic mesoporous organosilica spheres (HPMOSs) have some important special applications owing to their unique properties, but current syntheses usually involve various template methods that are time-consuming. Herein, we report a highly efficient and controllable synthesis of HPMOSs with radial mesochannels, only through introducing a pre-hydrolysis process to the commercially available bissilylated organosilanes (R′O)3Si–R–Si(OR′)3 with CTAB. The HPMOSs are robust with a mean diameter as small as 45 nm and a shell thickness as thin as 14 nm. A cytotoxicity assay indicates that the obtained HPMOSs possess good biocompatibility, and the HPMOSs with thioether groups are degradable under a 10 mM glutathione microenvironment. The amphiphilic organosilica precursors derived from the pre-hydrolysis process, CTAB micelles, and ethanol contribute to the formation of the HPMOSs.
研究领域:
材料科学
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纳米技术
·
化学工程
·
生物医学工程
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产品关联
DOI
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2021
·Vol. 127
·期 10
·1-9
·
IF 2.584
Zhang Yu,Cao Ping,Lin Wei,Liu Qiang,Chen Ziyuan,Cao Jun,Yang Guannan,Cui Chengqiang
In this paper, a mixed sintering accelerator of colophony and cetyltrimethyl ammonium bromide (CTAB) was developed to improve the sintering properties of Cu nanoparticles (NPs) paste. With the synergy effect of the mixed sintering accelerator, Cu NPs paste could be well sintered at 260 °C for 30 min under a pressure of 2 MPa, and the shear strength was greatly improved from 15 to 33 MPa. The fracture morphology of the Cu NPs joint transformed from brittle interface failure features to ductile dimple features, and the porosity in the sintered layer was significantly reduced. XRD analysis further confirmed that the synergy of colophony and CTAB could effectively remove the oxides in the Cu NPs paste during sintering, and thereby improve the sintering properties. This work can provide an applicable approach to improve the sintering properties of metal NPs and help to understand the synergy effect of sintering accelerators on the bonding behaviors of metal nanoparticles at low temperatures. Graphic abstract
研究领域:
材料科学
·
纳米技术
·
化学工程
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Mengying Xu,Pier-Luc Tremblay,Muhammad Babur Joya,Abanchime Zenaba Hadja Kaka,Emmanuel Seneway Kollah,Blessings Kapungwe Mwansa,Wenhao Wang,Yang Liu,Xiaolin Xing,Feijun Qiu,Tian Zhang
Humic acids (HAs) in water react with chlorine disinfectants and form carcinogenic chemicals. These molecules also inhibit environmental engineering processes aiming at the removal of toxic metals and organic contaminants from wastewater. For these reasons, low-cost adsorption strategies are being developed to take out HAs from water. Here, the metal oxide Bi 2 MoO 6 with either exposed [001] (BMO-001-Br) or [010] (BMO-010-Br) facets prepared with the cetyltrimethylammonium bromide (CTAB) surfactant was evaluated for the adsorption of HAs. With a maximal adsorption capacity for HAs of 63.1 mg/g, BMO-001-Br nanosheets constituted a superior adsorbent capable of removing contaminants over a large pH range. BMO-001-Br was reusable and could separate HAs from multiple solutions including tap water, synthetic wastewater, and real pharmaceutical wastewater. The adsorption capacity of BMO-001-Br can be explained by its suitable specific surface area and its positive surface charge related to the presence of CTAB molecules attracting negatively charged HA molecules. A third feature of BMO-001-Br involved in HAs removal is a high abundance of oxygen vacancies, which are easier to form on a BMO surface with exposed crystal [001] facets. The notable performance of BMO-001-Br indicates that it can serve efficiently for the extraction of HAs from different aqueous solutions.
研究领域:
环境工程
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水处理
·
材料科学
✓ 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）