KOREAN JOURNAL OF CHEMICAL ENGINEERING
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2016
·Vol. 33
·期 5
·1692-1697
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IF 1.408
Yue Hongya,Liu Zhigang
Density and surface tension have been measured for mixtures of biodiesel+ n -butanol, biodiesel+diesel, and diesel+ n -butanol over the entire concentration range at 283.15 K and 293.15 K and atmospheric pressure, with the combined expanded uncertainties of 1.32 kg·m −3 and 1%, receptively. Densities were determined by a single-sinker densimeter; surface tensions were measured using the surface laser light scattering method. The experimental data showed that densities and surface tensions decreased as temperature increased. The excess surface tensions and excess densities were all negative, and further fitted to the Redlich-Kister equation.
研究领域:
物理化学
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能源科学
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Xiaowei Wu,Yuqin Li,Yu Li,Mingyu Peng,Zhengquan Yang,Tian Gui,Xiangshu Chen,Hidetoshi Kita
Highly hydrophilic and durable Beta zeolite membranes with high aluminum (Al) spatial distribution were synthesized on inexpensive α-alumina supports via an organic template-free synthesis gel. In the absence of organic templates, the Al spatial distribution of Beta zeolite membrane crystal was regulated by the synthesis parameters such as the Al 2 O 3 /SiO 2 ratio, alkalinity, H 2 O/SiO 2 ratio and crystallization temperature, and the crystal morphology, Si/Al ratio and dehydration performance of the membrane could be further effectively controlled. Under optimal synthesis conditions, the prepared Beta zeolite membrane had an excellent separation factor of over 22,000 and a high permeation flux of 3.02 kg m −2 h −1 in the case of a 90 wt% n-butanol/water mixture at 75 °C. The high-performance Beta zeolite membrane was applied for continuous dehydration to obtain anhydrous n-butanol (99.9 wt%) from a 90 wt% n-butanol/water mixture. Furthermore, Beta zeolite membranes showed long-term acid stability in pervaporation dehydration of a 90 wt% n-butanol/water mixture with a pH value of approximately 2.0 at 75 °C for 192 h, indicating that these membranes by adjusting Al spatial distribution exhibited excellent hydrophilicity and acid resistance, which had a broad promising prospect of industrial applications for dehydration separation of acid-containing organic solvents.
研究领域:
材料科学
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化学工程
✓ 已验证
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Wangchang Geng,Pengfei Song,Libing Duan,Tingyue Luan
Metal-organic frameworks (MOFs)-derived metal oxides have a high specific surface area and porous structure, making them promising for gas sensing applications. In this paper, MOFs-derived In 2 O 3 /ZnCo 2 O 4 composites were synthesized using a two-step solvothermal method. Through a series of characterization strategies, it is revealed that the morphology of the In 2 O 3 /ZnCo 2 O 4 composites consists of hollow microtubes and microflowers. The gas sensing performance of In 2 O 3 /ZnCo 2 O 4 composites was significantly enhanced compared to pure In 2 O 3 . Among them, the In 2 O 3 /ZnCo 2 O 4 -2 sensor exhibited superior performance towards 100 ppm n -butanol gas, with a lower operating temperature of 200℃, a higher response value of 208.7, a lower detection limit of 4.2 ppb, shorter response/recovery times of 152 s/223 s, higher selectivity, and better repeatability. Furthermore, the improved gas response can be attributed to the utilization of MOFs as self-sacrificial templates, the high specific surface area of the sensing materials, and the formation of p-n heterojunctions. This study provides a valuable reference for synthesizing n -butanol sensing materials with a high specific surface area, strong response, and excellent selectivity.
研究领域:
材料科学
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化学
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传感器技术
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产品关联
DOI
高影响因子
Nanomaterials
·
2019
·Vol. 9
·期 12
·1714
·
IF 4.034
Weiping Liu,Ximing Zhang,Zhaofeng Wang,Ruijian Wang,Chen Chen,Chengjun Dong
Cd/In-glycerate spheres are synthesized through a simple solvothermal method. After thermal treatment, these Cd/In-glycerates can be converted into CdIn2O4spheres. Many characterization methods were performed to reveal the microstructure and morphology of the CdIn2O4. It was found that pure CdIn2O4phase was obtained for the Cd/In starting materials at ratios of 1:1.6. The CdIn2O4spheres are composed by a large number of nanoparticles subunits. The CdIn2O4sphere-based sensor exhibited a low detection limit (1 ppm), high response (81.20 to 500 ppm n-butanol), fast response (4 s) and recovery (10 s) time, good selectivity, excellent repeatability, and stability at 280 °C. Our findings highlight the possibility to develop a novel gas sensor based on CdIn2O4for application in n-butanol detection with high performance.Keywords:gas sensor;n-butnaol;CdIn2O4;spheres;solvothermal method
研究领域:
材料科学
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化学传感器
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2017
·
IF 2.323
Qingsong Li,Midong Shi,Liping Wang,Gaoyin He,Fan Gan
The liquid–liquid equilibrium (LLE) experiments for n-butanol + n-hexane + ethylene glycol were carried out and LLE data were measured at 298.15, 303.15, 308.15, 313.15, and 323.15 K under atmospheric pressure. The analysis results of the effects of n-butanol content and temperature on extraction showed that high n-butanol content was not favorable for extraction, and temperature had little effect on extraction. Moreover, the NRTL and UNIQUAC models were applied to correlate the LLE data, and the correlated data indicated that the UNIQUAC model showed a better correlation performance.
研究领域:
化学工程
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物理化学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Lujiao Wang,Song Yang,Tao Zhou,Siyu Yang,Pengyu Bi,Jiangyi Zhou,Qi Wang,Hai Qiao
Extracellular vesicles, such as Escherichia coli outer membrane vesicles (OMVs), have been widely explored as carriers for contrast agents, yet their application in ultrasound imaging remains limited. In this study, heat-responsive nB-OMVs are developed by loading n-butanol into OMVs (nB-OMVs). Upon heating, the decreased solubility of n-butanol triggered phase separation within the vesicles, resulting in enhanced ultrasound signals, including fundamental, harmonic, and subharmonic components. Experimental results demonstrated that nB-OMVs retained the native morphology of OMVs, along with their tumor-targeting accumulation and tumor growth inhibition capabilities. nB-OMVs injection induces red blood cell extravasation into tumors, under near-infrared (NIR) irradiation, these extravasated RBCs acted as photothermal mediators, generating a localized thermal environment that activated intratumoral nB-OMVs and further amplified the ultrasound signal. In B-mode and contrast-enhanced ultrasound (CEUS) imaging, tumor grayscale intensities increased by 4.6- and 8.5-fold, respectively. This work provides a promising strategy for ultrasound-based tumor imaging using extracellular vesicles.
研究领域:
医学影像学
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生物材料学
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肿瘤学
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Xiaoshun Wei,Xuechun Yang,Yun Guo,Guohao Li,Yinzhong Liu,Lingli Cheng,Zheng Jiao
Being one of toxic and flammable volatile organic compounds (VOC), n-butanol has brought about many potential health risks, there is an urgent demand for highly sensitive detection techniques to monitor its concentration in occupational environments and the air. In this paper, Ce-doped MOF:ZnO sensors under UV activation for room-temperature detection of n-butanol were synthesized by the co-precipitation method and systemically characterized by XRD, SEM, HRTEM, and XPS. The sensitive performances were evaluated by the use of a WS-30A gas sensor measurement system. The results showed that Ce doping has significantly enhanced the sensitivity of the MOF:ZnO sensors, and the response value of the 0.08 % Ce-doped ZnO sensor has achieved to 397.30, which was 9.32 times higher than that of the pristine MOF:ZnO. And the response and recovery times were 17 and 117 s respectively, demonstrating a speedy detection capability. In addition, the sensor gained excellent stability and reproducibility with special selectivity for n-butanol. The comprehensive achievements of this research would be promising to promote the development of volatile organic compound detection technology and beneficial to the well application in the fields of environmental monitoring, industrial safety, and public health.
研究领域:
材料科学
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环境科学
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传感器技术
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Yujun Guo,Jiayi Qu,Zhenkai Zhang,Zhenyue Liu,Chen Yue,Qiuying Chen,Zhiguo Yang,Yang Mu,Xiaoning Wang,Davoud Dastan,Xi-Tao Yin,Xiaoguang Ma
In this paper, ZnS/NiO p-n heterojunction microspheres were fabricated via a two-step hydrothermal approach. The sensing properties of composites with different ZnS contents were investigated by regulating the ratio of Zn. When containing 25 mol% ZnS, the ZnS/NiO nanosphere sensor achieved a response of 125. The response was improved by a factor of about 83.3 compared to pure NiO. The sensor functions optimally at a temperature of 225 ℃, and it possesses excellent selectivity, a rapid response/recovery time (49/44 s), and long-term stability. Therefore, this paper provides a hydrothermal method to prepare ZnS/NiO nanocomposites with heterojunction, specifically designed to detect n-butanol. After performing a series of characterizations, it was determined that the enhancement of the gas-sensitive properties could be related to the construction of ZnS/NiO heterojunctions and the increase in oxygen vacancies.
研究领域:
材料科学
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化学传感器
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产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
·
2022
·
IF 3.269
Hengfei Zhang,Taotao Zhan,Junshuai Chen,Xin Li,Ying Zhang,Maogang He
The speed of sound of the (n-butanol + n-heptane) mixtures was measured by the Rayleigh-Brillouin light scattering method at temperatures ranging from 298.05 to 618.29 K and pressures up to 9.0 MPa. The relative expanded uncertainty of the speed of sound experimental system is 1.2% (coverage factor k = 2). The mixing effects were analyzed from molecular interactions: the trend that speed of sound rises first and then decreases with the n-butanol concentration mainly depends on the rupture of alkanol structures and the molecular association, respectively. Lacking other thermophysical properties of mixtures at high temperature and pressure, six classical speed-of-sound mixing rules only based on pure component properties were evaluated by experimental data, including Wood, Nomoto, Van Dael, Impedance dependence relations, and Time-average model and Volume-average model. It was found that the estimates by Wood’s relation (recognized as Junjie’s relation) agree best with experimental data. The applicability of mixing rules was further evaluated by 21 mixtures of (n-alkanol + n-alkane), where Wood’s relation still obtains great accuracy (average of rRMSDs = 0.91% and maximum = 1.84%). For these (n-alkanol + n-alkane) mixtures of weak interaction, Wood’s relation is expected to give reliable estimates for the under a wide temperature and pressure range, for just insignificant volume change being ignored.
研究领域:
物理化学
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热力学
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产品关联
DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2025
·
IF 2.5
Yue Lei,Wang Bo,Huang Yiheng,Feng Changhao
In this study, gas sensors based on Er-doped ZnFe 2 O 4 nanofibers (E-ZFO NFs) with varying ratios of Er doping were prepared by a facile electrospinning approach. The sensor based on 3% E-ZFO NFs demonstrated an enhanced response value of 30.3 for 100 ppm n -butanol at 175°C, with response and recovery times of 9 s and 94 s, respectively. This is approximately 3.1 times that of undoped ZFO NFs. Moreover, the sensor exhibited a minimum detection limit of 0.1 ppm, with excellent repeatability and selectivity. These results indicate that the sensors utilizing E-ZFO NFs are promising candidates for n -butanol gas sensors.
研究领域:
材料科学
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传感技术
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产品关联
DOI
高影响因子
RSC Advances
·
2024
·Vol. 14
·期 5
·3146-3157
·
IF 3.9
Yanlong Hu,Qiang Wang,Dingkai Hu,Yingshuang Zhang,Muhammad Furqan,Shijian Lu
Monoethanolamines (MEAs) are widely used for CO2 capture, but their regeneration energy consumption is very high. CO2 Phase change absorbents (CPCAs) can be converted into CO2-rich and CO2-lean phases after absorbing CO2, and the regeneration energy consumption can be reduced because only the CO2-rich phase is thermally desorbed. In this paper, a novel CPCA with the composition “MEA/n-butanol/H2O (MNBH)” is proposed. Compared with the reported MEA phase change absorbent, the MNBH absorbent has higher CO2 absorption capacity, smaller absorbent viscosity and CO2-rich phase volume. The MNBH absorbent has the highest CO2 absorption capacity of 2.5227 mol CO2 per mol amine at a mass ratio of 3 : 4 : 3. The CO2 desorption efficiency reaches 89.96% at 120 °C, and the CO2 regeneration energy consumption is 2.6 GJ tCO2−1, which is about 35% lower than that of the 30 wt% MEA absorbent. When the mass ratio of MNBH absorbent was 3 : 6 : 1, the CO2 recycling capacity was 4.1918 mol CO2 L−1, which is 76% higher than that of the conventional 30 wt% MEA absorbent. The phase change absorbent developed in this paper can reduce the desorbent volume by about 50% and has good absorption performance for CO2 in flue gas.
研究领域:
化学工程
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Qingsong Luo,Yan Chen,Changhao Feng,Shuang Gao,Tianyu Lan,Qiyuan Fu,Runduo Teng
For applications in environmental protection, industrial production, and personal health monitoring by breath exhalation, the sensitive and selective detection of n-butanol is of extreme importance. An n-butanol gas sensor has been developed utilizing LaFeO 3 nanofibers doped with Er 3+ by an electrospinning technique. Compared to the pure sample, the gas sensor shows an improved response of 58.97 to 30 ppm n-butanol, which was boosted by 5.99-fold due to the smaller average grain sizes (21.2 nm), porosity of the nanofiber, and abundant chemical-absorbed oxygen species (38.5%) at an Er doping level of 3 at%. It has excellent selectivity to n-butanol, a fast response/recovery time (17 s/27 s), superior stability during 30 days, and a low detection limit (100 ppb), which indicates that Er-doped LaFeO 3 nanofibers have excellent sensing capabilities for real-time n-butanol detection.
研究领域:
材料科学
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环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
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