Catalysis Science & Technology
·
2016
·Vol. 6
·期 12
·4337-4344
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IF 5.287
Xiaolong Liu,Junlin Zeng,Jian Wang,Wenbo Shi,Tingyu Zhu
Ruthenium-based catalysts Ru/TiO2, Ru/SiO2, Ru/γ-Al2O3, and Ru/ZrO2 were prepared and evaluated for CH3Br oxidation, and Ru/TiO2 showed better catalytic performance than the other samples. The product yields and selectivities were also studied. The thermal stability was examined with a 48 h on-stream test. The influence of water vapor on the catalytic oxidation of CH3Br was studied at 210 °C and 230 °C, and it was found that the inhibition effect weakened with the increase in temperature. Additionally, Ru/TiO2 was also employed in the catalytic oxidation of CO, benzene, methyl acetate, and multi-pollutants of simulated PTA offgas.
研究领域:
环境化学
·
催化科学
·
大气污染控制
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DOI
高影响因子
Separations
·
2023
·Vol. 10
·期 7
·387
·
IF 2.6
Kai Yao,Ruoke Jiang,Ping Wang,Jing Zhang,Bing Shao,Xiaojing Ding
A novel method utilizing non-aqueous capillary electrophoresis (NACE) with indirect ultraviolet detection (IUD) has been developed for the analysis of five quaternary ammonium compounds (QACs). The QACs analyzed in this study include dodecyl trimethyl ammonium bromide, tetradecyl trimethyl ammonium bromide, dioctyl dimethyl ammonium chloride, octyldecyl dimethyl ammonium chloride and didecyl dimethy ammonium bromide. The separation process was carried out on an uncoated fused quartz capillary with a total length of 50.2 cm (effective length 40.0 cm) and a diameter of 50 μm. The separation buffer consisted of a mixture of MeOH/ACN (90:10,v/v) containing 2 mmol/L sodium acetate, 2 mmol/L trifluoroacetic acid (TFA) and 16 mmol/L dodecyl dimethyl benzyl ammonium chloride. The sample buffer utilized a mixture of MeOH/ACN (20:80,v/v) containing 2 mmol/L TFA. During analysis, a separation voltage of 7 kV was applied, resulting in a current of approximately 2.3 μA. The detection wavelength was set at 214 nm to ensure optimal sensitivity. Under optimal conditions, the method exhibited excellent performance characteristics, with a limit of detection of 0.5 mg/L and a limit of quantitation of 5.0 mg/L for the five QACs. Linear calibration curves were obtained in a concentration range of 5.0 to 100.0 mg/L, with correlation coefficients exceeding 0.999 for all compounds. The recoveries of the five QACs ranged from 92.3% to 114.7%, with relative standard deviations below 7.4%. To assess the applicability of the NACE-IUD method, 17 commercially available samples were successfully analyzed. The results confirmed the suitability of the method for accurate determination of the five QACs in disinfectant products. Notably, this method offers an environmentally friendly approach for the analysis of these QACs.Keywords:non-aqueous capillary electrophoresis;indirect ultraviolet detection;quaternary ammonium compounds;dodecyl trimethyl ammonium bromide;tetradecyl trimethyl ammonium bromide;dimethyl dioctyl ammonium chloride;octyldecyl dimethyl ammonium chloride;didecyl dimethy ammonium bromide
研究领域:
分析化学
·
环境科学
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产品关联
DOI
高影响因子
Biomed Research International
·
2018
·
IF 2.583
Wenshu Lin,Bing Niu,Jialin Yi,Zhirui Deng,Jiang Song,Qin Chen
The wide use of disinfectants has prompted resistance from the microbiome which will in turn reduce the bactericidal effect of disinfectants. Hence, glutaraldehyde (GA) and didecyldimethylammonium bromide (DDAB) were used to develop a combination disinfectant with high stability and antimicrobial effects, which was named GA-DDAB combination disinfectant (GD). The bactericidal mechanism against Escherichia coli was studied in our earlier work. In this study, we focused on GD’s bactericidal efficacy in both the laboratory and environment, the genetic toxicity to mouse lymphoma L5178Y TK+/− cells, acute peroral toxicity in mice, and its metal corrosion properties with a view to providing theoretical support for developing a high-efficiency, low toxicity, and weakly corrosive disinfectant for general use.
研究领域:
微生物学
·
毒理学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
SENSORS
·
2013
·Vol. 13
·期 1
·758-768
·
IF 1.953
Qing Lu,Weina Zhang,Zhihui Wang,Guangxia Yu,Yuan Yuan,Yikai Zhou
A facile electrochemical sensor for the determination of nonylphenol (NP) was fabricated in this work. Cetyltrimethylammonium bromide (CTAB), which formed a bilayer on the surface of the carbon paste (CP) electrode, displayed a remarkable enhancement effect for the electrochemical oxidation of NP. Moreover, the oxidation peak current of NP at the CTAB/CP electrode demonstrated a linear relationship with NP concentration, which could be applied in the direct determination of NP. Some experimental parameters were investigated, such as external solution pH, mode and time of accumulation, concentration and modification time of CTAB and so on. Under optimized conditions, a wide linear range from 1.0 × 10−7mol·L−1to 2.5 × 10−5mol·L−1was obtained for the sensor, with a low limit of detection at 1.0 × 10−8mol·L−1. Several distinguishing advantages of the as-prepared sensor, including facile fabrication, easy operation, low cost and so on, suggest a great potential for its practical applications.Keywords:nonylphenol (NP);cetyltrimethylammonium bromide (CTAB);determination;electrochemical sensor
研究领域:
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CRYSTENGCOMM
·
2024
·
IF 2.6
Yuanlong Sun,Yundong Ma,Xiangting Li,Ziyu Hu,Guozong Zheng
As a new generation of photoelectric materials, organic–inorganic halide perovskites have been widely used in photodetectors, solar cells and other fields, but most of the current mainstream applications are thin film materials. Compared with polycrystalline thin films, perovskite single crystals have fewer grain boundaries and relatively stable electron and hole transport, and are ideal materials for optoelectronic devices. To realize the controllable growth of CH3NH3PbBr3 (MAPbBr3) crystals, understand their growth mechanism, and reflect the inherent physical and chemical properties of the material, a new type of internal growth temperature control and external circulation cooling growth system was developed in this paper, which can accurately control the temperature change during crystal growth. The size of the grown MAPbBr3 single crystal reaches 62 × 58 × 23 mm3, which is the largest single crystal reported to date. The measured single crystal absorption cut-off edge, optical band gap, and carrier lifetime are superior to the traditional simple inverse temperature crystallization (ITC) method, which will help its deep applications in photovoltaics, optoelectronics, and X-ray imaging.
研究领域:
材料科学
·
光电技术
·
晶体生长
✓ 已验证
产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2018
·
IF 2.88
Zhen Cheng,Lingling Du,Panpan Zhu,Qian Chen,Kejun Tan
Because of the serious harm to animals and the environment associated with perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA), a rapid, sensitive and low-cost method for detecting PFOS and PFOA is of great importance. In this paper, a novel sensing method has been proposed for the highly sensitive detection of PFOS and PFOA in environmental water samples based on the “turn-on” switch of erythrosine B (EB)-hexadecyltrimethylammonium bromide (CTAB) system. In pH 8.55 Britton-Robinson (BR) buffer, EB can react with CTAB by electrostatic attraction, resulting in a strong fluorescence quenching of EB. With a subsequent addition of the CTAB, a red-shift occurred (11 nm), followed by a significant increase in fluorescence at high surfactant concentrations. It was found that PFOS and PFOA can obviously enhance fluorescence intensity of EB-CTAB system. The enhanced fluorescence intensity is proportional to the concentration of PFOS and PFOA in the range of 0.05–10 μM with detection limit of 12.8 nM and 11.8 nM (3σ), respectively. The presented assay has been successfully applied to sensing PFOS and PFOA in real water samples with RSD ≤ 4.3% and 2.9%, respectively.
研究领域:
环境科学
·
分析化学
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产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Fanghao Ye,Huijun Zhang,Pang Wang,Wei Li,Donghui Li,Baocai Du,Dan Liu,Tao Wang
Two-dimensional (2D)/three-dimensional (3D) perovskites have been successfully applied in high-efficiency light-emitting diodes (LEDs) because of their large exciton binding energy (Eb) caused by the quantum and dielectric confinements. Thermal annealing and antisolvent treatments are usually executed in order to promote the crystallization and film quality of perovskites, which add complexity to the device fabrication process. Here, the cesium-based 2D/3D perovskite was prepared by introducing ammonium halide benzamidine hydrochloride (BMCl) as the additive. By further introducing an appropriate amount of MABr and PbBr2, BM2(Cs1–xMAxPbBr3)n−1PbBr4 crystals can be formed rapidly without any additional treatments, while inhibiting the formation of the unfavorable Cs4PbBr6 phase. The optimized 2D/3D perovskite-based LEDs achieved a maximum luminance of 12 367 Cd/m2, a current efficiency of 17.4 Cd/A, and an external quantum efficiency of 5.2%. Our results suggest that appropriate perovskite crystallization can be achieved at room temperature by the regulation of precursor solution, making the perovskite crystallization process easier to control with reduced processing complexity.
研究领域:
材料科学
·
光电工程
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DOI
PubMed
高影响因子
Colloid and Interface Science Communications
·
2022
·
IF 5.633
Zhiguo Zhang,Zilong Guo,Wensheng Yang
Coating silica on Au particles has been known to be effective to improve their stability and performance. In this work, we demonstrated a cetyltrimethylammonium bromide (CTAB) assisted approach for preparation of Au@SiO 2 particles in ethanol/water mixtures. At ethanol content of 0.25, Au particles were well dispersed, while at ethanol content of 0.50, the aggregated Au particles were gradually dispersed with increasing CTAB concentration, attributed to the gradual formation of CTAB bilayer on the particle surface. When tetraethyl orthosilicate and ammonia were added directly to the Au particle dispersions, the Au@SiO 2 particles formed at the low ethanol content (0.25) were red in color and spherical in shape with a core composed of single Au particles, and these formed at the medium ethanol content (0.50) were purple in color and fractal-like in shape with a core composed of multiple Au particles.
研究领域:
材料科学
·
纳米技术
✓ 已验证
DOI
高影响因子
Materials Chemistry Frontiers
·
2021
·Vol. 6
·期 1
·103-116
·
IF 6.482
Li Yu,Tiantian He,Jia Yao,Wendi Xu,Shuping Peng,Pei Feng,Cijun Shuai
Developing a novel antibacterial material with highly effective and long-lasting antibacterial activity to prevent bacterial infection during or post bone scaffold transplantation is an urgent need for bone regeneration. In this study, a synergistic antibacterial system for a polyglycolic acid (PGA) scaffold was constructed by cation exchange of montmorillonite (MMT) with Cu2+ and then intercalation of cetyltrimethylammonium bromide (CTAB) into the interlayer of MMT. On one hand, the introduced Cu2+ enlarged the interlayer spacing of MMT, facilitating the intercalation of CTAB into the MMT interlayer to impart the antibacterial effect. On the other hand, the intercalation of CTAB into MMT shifted the surface potential of MMT from negative to positive, improving the bacterial adsorption capacity by electrostatic forces so that Cu2+ could act directly on the negatively charged bacteria. As a result, the bacterial adsorption rate of Cu2+ and CTAB modified MMT (Cu-CMMT) improved by 76.5% compared with that of MMT, which could be explained by the increased zeta potential from −26.1 to 19.7 mV. Besides, the scaffold with Cu-CMMT exhibited robust antibacterial activities against E. coli with an antibacterial rate of 98.1%, which was significantly higher than that of the scaffold with Cu2+ or CTAB modified MMT individually. The scaffold with Cu-CMMT exhibited the highest level of reactive oxygen species (ROS), which was attributed to the dilapidation of bacterial cells.
研究领域:
材料科学
·
生物医学工程
·
微生物学
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Weiliang Pan,Xun Zhang,Rui Deng,Li Gu,Xiuqing Tan,Shanji Yan,Ruihao Zhang,Qiang He
Waste activated sludge (WAS) is produced by urban sewage treatment plants, which contains pathogenic microorganisms, chemical elements, wiht high moisture content (>99%). To mitigate environmental pollution and reduce the volume of WAS, sludge dewatering are widely needed. The main objective of this study is to investigate the improvement in sludge dewaterability through the combined efficacy of tannic acid (TA) and cetyltrimethylammonium bromide (CTAB). Significant reductions in Capillary Suction Time (CST), Specific Resistance to Filtration (SRF), and moisture content of vacuum-filtered sludge cake (WC) were observed as experimental findings demonstrated the combined use of TA and CTAB. Specifically, CST decreased from 78.6 s to 15 s, SRF reduced from 1.12×10 13 m/kg to 2.23×10 12 m/kg, and WC decreased from 97.98% to 74.80%. The levels of polysaccharides and proteins present in various layers of the extracellular polymeric substances (EPS) within the sludge were reduced due to the interaction and formation of protein complexes with TA and CTAB. Additionally, these additives neutralized surface with a negative electrical potential of EPS, decreasing repulsion among sediment particles. This led to a decrease in the Zeta potential , while the contact angle and particle size of the sludge increased. Additionally, the hydrophobicity of the sludge particles was enhanced. As a result, intracellular moisture was released by disrupting the sludge cells. The findings presented here may assist in the development of sustainable and productive strategies for the management of sludge, ultimately promoting environmental protection and the well-being of urban communities.
研究领域:
环境科学
·
污水处理
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产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2021
·Vol. 28
·期 28
·37182-37194
·
IF 4.223
Wang Youqun,Xie Yinghui,Zheng Zhiyang,Zeng Dejun,Dai Ying,Zhang Zhibin,Cao Xiaohong,Zou Rong,Liu Yunhai
In this work, hexadecyltrimethylammonium-bromide (HTAB)-modified polythiophene (PTh)/TiO 2 nanocomposite (HTAB/PTh/TiO 2 ) was applied to remove uranyl ions (UO 2 2+ ). FT-IR, XRD, ζ potential, TGA, SEM, and XPS were utilized to obtain the chemical and physical properties of HTAB/PTh/TiO 2 . The effects of HTAB content, preparation temperature, and adsorption conditions on UO 2 2+ removal were investigated comprehensively. And the UO 2 2+ adsorption process on HTAB/PTh/TiO 2 was fitted to the Sips model with a saturated adsorption capacity of 234.74 mg/g, which was 6 times over TiO 2 . The results suggested that the surfactant of HTAB can significantly improve the adsorption ability of TiO 2 for UO 2 2+ ions. This work provides a strategy of surfactant modification for enhancing the separation and recovery ability of adsorbent toward UO 2 2+ in the radioactive wastewater.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
ENVIRONMENTAL POLLUTION
·
2020
·
IF 6.793
Dan Li,Yin Zhong,Xifen Zhu,Heli Wang,Weiqiang Yang,Yirong Deng,Weilin Huang,Ping’an Peng
Tris(2-chloroethyl) phosphate (TCEP) is a widely found emerging pollutant due to its heavy usage as a flame retardant . It is chemically stable and is very difficult to removal from water. The goal of this study was to explore whether iron monosulfide (FeS) can be used for reductive transformation of TCEP as FeS can react with a variety of halogenated organic contaminants . We used batch reactor systems to quantify the transformation reactions in the absence and presence of cetyltrimethylammonium bromide (CTAB, a common surfactant in aquatic environments). The results showed that, in the presence of CTAB (100 mg L −1 ), FeS exhibited much greater reactivity towards TCEP as 93% of initial TCEP had been transformed within 14 d of reaction. In the absence of CTAB, it required 710 d of reaction to achieve 97.3% reduction of initial TCEP. The enhancement of CTAB on TCEP transformation rate could be due to the facts that CTAB could stabilize FeS suspension against aggregation, protect FeS from rapid oxidation, and increase surface adsorption of TCEP on FeS. XPS analysis showed that both Fe(II) and S(-II) species on the FeS surface were involved in the reductive transformation of TCEP. Analysis of transformation products revealed that TCEP was reductively transformed into bis(2-chloroethyl) phosphate (BCEP), Cl − and C 2 H 4 . These findings showed that FeS may play an important role in the reductive transformation of TCEP when TCEP coexisting with CTAB in aquatic environments.
研究领域:
环境科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）