INTERNATIONAL JOURNAL OF FOOD SCIENCE AND TECHNOLOGY
·
2020
·Vol. 56
·期 5
·2492-2503
·
IF 2.773
Tian Li,Qin Guo,Yang Qu,Yujie Li,Xinping Wang,Zhigao Sun,Qiang Wang
Summary An improved gas chromatography-based analytical method for the simultaneous separation of seventy-two fatty acids was developed. Twenty-six types of trans fatty acids and conjugated linoleic acids were separated and identified with this method, especially trans C18 isomers. This method was confirmed to be high throughput and have high sensitivity and a low detection limit. It was successfully applied to separate and identify fatty acids in fresh basil seed oil. The linolenic acid content (51.67 g/100 g) was highest in basil seed oil, followed by linoleic acid (20.16 g/100 g) and oleic acid (12.70 g/100 g). These unsaturated fatty acids in fresh basil seed oil were transformed into trans fatty acids, conjugated linoleic acids and saturated fatty acids after heating to a certain temperature for an adequate duration, and the formation mechanisms were characterised.
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2017
·Vol. 135
·期 8
·45907
·
IF 1.86
Ge Shu,Chong Zhang,Yuda Li,Jia-Xing Jiang,Xunchang Wang,Hui Li,Feng Wang
Novel hypercrosslinked microporous organic polymers (MOPs) derived from N-functionalized siloles as basic building units have been designed and synthesized via Friedel–Crafts alkylation reaction. The resulting N-functional silole-containing polymer networks exhibit high thermal stabilities and moderate Brunauer–Emmett–Teller surface area ranging from 666 to 1137 m 2 g −1 . The incorporation of carbazole or triphenylamine moieties into the polymer skeleton increases the number of electron donating basic nitrogen sites in the porous frameworks. Thus, the corresponding polymer PDMCzS shows enhanced CO 2 adsorption capacities of 3.23 mmol g −1 at 273 K and 1.13 bar, and higher CO 2 /N 2 selectivity (43.99) at 273 K than the analogous silole-containing polymers P1–P3. These results demonstrated that the N-functionalized silole-containing polymer network is a very promising candidate for potential applications in post-combustion CO 2 capture and sequestration. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 45907.
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS RESEARCH
·
2023
·Vol. 38
·期 5
·1266-1281
·
IF 2.7
Zhou F. Y.,Xu J. C.,Hong B.,Peng X. L.,Zeng Y. X.,Li J.,Ge H. L.,Wang X. Q.
Mesoporous SnO 2 nanospheres are synthesized by template-free solvothermal method, and then reduced graphene oxide (rGO) nanosheets are anchored on SnO 2 nanospheres (SnO 2 @rGO nanocomposites) by hydrothermal method. The gas-sensing results indicate that rGO nanosheets greatly affect the formaldehyde (HCHO) gas-sensing properties, which the response to 100 ppm HCHO gas increases with the rGO content and reach the maximum of 113.56 at 190 °C for SnO 2 @0.5%rGO sensor. Owing to the huge surface area and conductivity, rGO nanosheets absorb more oxygen molecules and extract electrons from SnO 2 nanospheres, leading to the thicker electron depletion layer of SnO 2 nanospheres. Furthermore, p-n heterojunctions at the interface of rGO nanosheets and SnO 2 nanospheres further increase the thickness of electron depletion layer. However, SnO 2 @0.8%rGO sensor presents the lower response for the new conductive pathways between the surface rGO nanosheets due to the excess of rGO content.
Graphical abstract
✓ 已验证
DOI
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2019
·
IF 3.571
Ning Yan,Xiao-Fang Wan,Xin-Sheng Chai
This study reported a new headspace gas chromatography (HS-GC) for simultaneously determining the degree of deacetylation (DD) and the degree of substitution (DS) in carboxymethyl chitosan (CMCS), which were based on HS-GC measuring the amounts of CO2 released from both the bicarbonate decomposition suppressed by -NH2 and the reaction between the bicarbonate and the acidified carboxymethyl and amino groups in CMCS. The results showed that the present method has a good measurement precision (RSD < 2.55%) and accuracy (relative differences <5.90%). Compared with the current titration-based method, the present HS-GC techniques provide a more reliable testing in the quantification of amino and carboxymethyl contents in CMCS. Moreover, since the HS-GC can perform an automated sample reaction equilibration and measurement, it could be much more efficient than the existing methods in the batch sample analysis.
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Weilong Rong,Yiqing Zeng,Shule Zhang,Qin Zhong
The technology of simultaneous ammonia selective catalytic reduction (NH 3 -SCR) denitration and carbon monoxide (CO) oxidation is a proposed approach for synergistic purification of nitrogen oxides (NO x ) and CO from flue gas. However, the lack of highly efficient catalysts has hindered the widespread adoption and application of this technology. Herein, a series of CuSO 4 /TiO 2 (denoted CuS/Ti-X, X means calcination temperature at 400, 500, and 600 °C) catalysts was prepared to investigate their performance for simultaneous NH 3 -SCR denitration and CO oxidation. The results show that dispersing CuSO 4 on TiO 2 carrier induces the formation of surface Cu-O defect structure and reduces the stability of the Cu-O-S structure, which gives CuS/Ti-X catalysts a good redox property. Hence, the CuS/Ti-500 catalyst exhibits good catalytic activity in simultaneous removal of NO and CO, even in the presence of SO 2 . Reaction process investigation demonstrated that the presence of NO and NH 3 inhibits the adsorption of CO and consumes active oxygen species, thereby suppressing the CO oxidation reaction. In contrast, CO can promote the activation of NH 3 via activating the redox sites, which is conducive to the NH 3 -SCR reaction via the E-R mechanism. This study provides new insights into the strategic design of dual-functional sulfur-resistant catalysts for flue gas purification.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Xin Wang,Tong Zou,Jiapan Lian,Yonglong Chen,Liping Cheng,Yasir Hamid,Zhenli He,Paramsothy Jeyakumar,Xiaoe Yang,Hailong Wang
Cadmium (Cd) contamination in agricultural soils is one of the major environmental challenges globally. Biochar is a promising material for mitigating Cd pollution, but it carries the risk of increasing greenhouse gas emissions . Herein, we incorporate iron-based materials into biochar to simultaneously enhance soil nutrients, mitigate heavy metal contamination, and reduce greenhouse gas emissions. The results showed that the iron-modified biochar (FeBC) increased soil available potassium , alkali-hydrolyzable nitrogen and soil organic carbon . All materials promoted the formation of strongly bound Cd (FMO-Cd), with FeBC outperforming standalone iron or biochar by reducing soil Cd bioavailability by 17.0–44.9 %. And the goethite-modified biochar (GBC) further enhanced iron plaque [FeO(OH)] formation, achieving the highest Cd reduction (80.4 %) in rice grains . In addition, except for biochar and zero-valent iron, the other treatments significantly suppressed CH 4 emission and stabilized CO 2 and N 2 O. Among them, GBC treatment reduced the relative abundance of the mcrA gene, a CH 4 emission-related gene, by 22.7 %, ultimately leading to the highest reduction in CH 4 emissions (26.3 %). These findings suggest the potential of FeBC as soil amendments to improve soil nutrients and food safety, while reducing greenhouse gas emissions.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Bang Lin,Bolang Cheng,Yong Zhang
Textile-based wearable gas sensor technologies have attracted significant attention due to their large surface area, internal gas adsorption capability, and integrability . However, the rough and porous nature of textiles often leads to non-uniform material deposition, limiting sensor performance. Here, we propose a universal modification method using hydrophobic SiO 2 nanoparticles to reduce the capillary effect in textiles, enabling precise inkjet printing of electrodes and sensing materials. By minimizing the capillary effect, a wearable CO sensor with a highly uniform CuO nanosheets sensing layer and precise Ag interdigitated electrodes is fabricated. At room temperature, the sensor exhibits a response of 76.2 % to 10 ppm CO, with a detection limit as low as 200 ppb (14.42 % response). In conditions of high humidity (98 % RH) and significant bending (120° for 5000 cycles), the sensor still exhibits high sensitivity to 10 ppm CO. This work presents a universal method for minimizing the capillary effect in textiles, offering new possibilities for developing flexible electronics and wearable gas sensors.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2020
·Vol. 31
·期 14
·11870-11877
·
IF 2.22
Chen Weigang,Yang Pengyu,Shen Wenfeng,Zhu Chaoting,Lv Dawu,Tan Ruiqin,Song Weijie
Flexible room temperature sub-ppm ammonia (NH 3 ) gas-sensing films based on polyaniline (PANI) nanoparticles were successfully developed on porous polyvinylidene fluoride (PVDF) substrate by in suit chemical oxidative polymerization method. The fabricated PANI/PVDF film sensor, which was synthesized with 0.1 mol/L aniline, possesses the best response value of 24.5% and 2.6% to 1 ppm and 0.1 ppm NH 3 at room temperature, respectively. Furthermore, the PANI/PVDF film sensor shows excellent selectivity towards NH 3 compared with methanol, ethanol, acetone, toluene, and formaldehyde at room temperature. The improved sensing performance is related to the porous PVDF nanostructure and synergetic effects of PVDF and PANI. Finally, the effect of working temperature and relative humidity on the sensing properties of the PANI/PVDF thin film sensor was also discussed and analyzed. The results show the potential application of the flexible PANI/PVDF film sensor for monitoring sub-ppm NH 3 gas under ambient conditions.
✓ 已验证
DOI
高影响因子
FUEL
·
2021
·
IF 6.609
Lanlan Jiang,Zucheng Cheng,Shaohua Li,Nan Xu,Huazheng Xu,Jiafei Zhao,Yu Liu,Minghao Yu,Yongchen Song
Hydrate-based gas storage and transportation is limited by harsh hydrate formation conditions and low formation rate, which cannot be used in large-scale commercial applications. In this work, based on the good thermodynamic properties of tetrahydrofuran (THF), we systematically studied the hydrate formation kinetics of CH 4 –THF (5.56 mol%) hydrate under static conditions (4 MPa and 282.2–288.2 K). The experimental results showed that CH 4 storage was greatest at 288.2 K within 5 h, reaching a value of 0.0483 ± 0.005 mol/mol, which was 19.85% higher than that at 282.2 K. Based on the quantitative results of Raman spectroscopy, the proportion of CH 4 in the small cages of sII hydrates increased by approximately 11.63% with an increase in temperature from 282.2 to 288.2 K. In addition, by observing the growth behavior and morphology of CH 4 -THF hydrate, it was found that the morphology of CH 4 -THF hydrate became looser with the decrease of undercooling ( Δ T s u b ), which effectively promoted the formation of hydrate. Furthermore, the energy consumption during CH 4 -THF hydrate formation was greatly decreased with the increase of temperature, saving about 98.62% at 288.2 K. This study provides a theoretical basis for the storage and transportation of natural gas via the solid hydrate method.
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry B
·
2024
·
IF 6.1
Wenbo Wang,Zhaoyi Cheng,Hui Xing,Shihao Zhou,Qiaozhang Ye,Guan-Hai Wang,Gaofei Xiong,Dong Ma
Nitric oxide (NO) gas molecules have demonstrated remarkable anti-tumor effects and minimal susceptibility to drug resistance, establishing as a promising modality for effective tumor treatment. However, how to realize its stable and efficient delivery in vivo is still a challenge. In this study, we have developed a heat-responsive biomimetic nano erythrocyte (M/B@R) by loading the NO donor (BNN6) onto the mesoporous Prussian blue (M-PB) and subsequently enveloping them with red blood cell membranes. The preserved integrity of the red blood cell membrane (RBCm) structure could ensure its excellent biosafety, prolong its circulation time within the bloodstream and then enhance the accumulation of BNN6 at tumor sites. When M/B@R is stimulated by near-infrared light (NIR-II, 808 nm) irradiation, the nanoparticle could generate significant heat for photothermal therapy (PTT) by the characteristic NIR absorption of M-PB and then NO also could be efficiently released. The generated NO further facilitates the formation of ONOO−, a highly toxic species to the tumor, while also alleviating tumor hypoxia. Remarkably, M/B@R, with NIR as the excitation source, induces the combined lethality through hyperthermia, DNA damage, and tumor hypoxia relief. This novel combination strategy provides a new avenue for PTT/NO-induced cancer therapy.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYTICA CHIMICA ACTA
·
2024
·
IF 5.7
Siyuan Jing,Yanting Wang,Jiaying Zheng,Xin Li,Yinjuan Chen,Minghuo Wu,Weiping Liu,Thomas C. Wanger
Particle size is an important indicator to evaluate the environmental risk and biotoxicity of nanoplastic (NP, particle diameter <1000 nm). The methods available to determine size classes of NP in environmental samples are few and are rare to achieve efficient separation and recycling of NP with close particle sizes. Here, we show that rate-zonal centrifugation (RZC) can quickly and efficiently collect NP of different sizes based on their sedimentation coefficients. When combined with cloud-point extraction (CPE) and pyrolysis−gas chromatography−mass spectrometry (Py-GC-MS), our method can quantify three NP particle-size classes separately (including 100 nm, 300 nm, and 600 nm) in aqueous samples with high recovery (81.4 %–89.4 %), limits of detections (LODs, 33.5–53.4 μg/L), and limits of quantifications (LOQs, 110.6–167.2 μg/L). Compared with the conventional sample pretreatment process, our method can effectively extract and determine the NP with different sizes. Our approach is highly scalable and can be effectively applied to NP in a wide range of aquatic environments . Meanwhile, our approach is highly scalable to incorporate diverse assays to study the environmental behaviours and ecological risks of NP.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF CATALYSIS
·
2025
·
IF 6.5
Jun-Fei Shen,Gui-Ming Wu,Na Tian,Hai-Wei Liang,Zhi-You Zhou,Shi-Gang Sun
Pt-based alloys demonstrate superior catalytic activity for the oxygen reduction reaction (ORR) in proton exchange membrane fuel cells (PEMFCs), yet their instability due to transition metal leaching poses a critical challenge. While structurally ordered PtM intermetallic compounds (IMCs) exhibit enhanced stability compared to disordered alloys, their conventional high-temperature synthesis often induces particle aggregation and diminished catalytic performance. Herein, we present a solvent-free gas-phase dispersion strategy leveraging the volatility of acetylacetonate precursors to synthesize ordered PtCo IMC nanoparticles (PtCo/C-IMC) with ultrasmall size (3.0 nm) and uniform compressive lattice strain. The PtCo/C-IMC catalyst delivers exceptional ORR activity (0.92 A mg Pt −1 at 0.9 V) and durability (6.8 % mass activity decay after 100,000 cycles). In H 2 -air PEMFCs, it achieves a peak power density of 1.53 W cm −2 at 0.6 V and demonstrates outstanding operational stability, with voltage losses of only 17 mV (0.8 A cm −2 ) and 21 mV (1.5 A cm −2 ) after 30,000 accelerated durability test (ADT) cycles, surpassing the DOE 2025 targets and outperforming most reported catalysts. Density functional theory (DFT) calculations and post-ADT characterization reveal that the engineered compressive strain strengthens Pt-Co atomic interactions, optimizes the electronic structure, and elevates the vacancy formation energy of Co. These effects enhance both catalytic activity and stability, offering a scalable pathway for the design of advanced PEMFC catalysts.
✓ 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）