RSC Advances
·
2016
·Vol. 6
·期 62
·57009-57012
·
IF 3.289
Di Wu,Jing Ye,Lie Chen,Yongzheng Wang,Kai Fang,Mingjiang Xie,Luming Peng,Xuefeng Guo,Weiping Ding
Crystalline mesoporous γ-Fe2O3 with a high surface area was prepared by a novel solvent-free route. This material exhibits a high reversible capacity with superior cycle performance and an exceptional high-rate capability as an anode material for Li-ion batteries.
研究领域:
材料科学
·
电化学
·
纳米材料
·
能源存储
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固体化学
·
电池技术
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2025
·
IF 4.8
Tinghao Han,Zhongdi Liu,Lincai Peng,Weipeng Song,Huai Liu,Wenlong Jia,Rui Zhang
The efficient production of γ-valerolactone (GVL) with high yield directly from xylose is of particular interest but remains a great challenge due to the long reaction path. We herein developed a facile catalytic system to directly convert xylose to GVL with a record-high yield of 54.3 %, employing β-zeolite supported Zr-based catalyst in 1,4-dioxane/isopropanol co-solvent. Using Zr(NO 3 ) 4 ·5 H 2 O as the Zr sources resulting in well-retained β-zeolite structure, larger surface area and pore volume and better dispersion of Zr species, as well as balanced acidic sites where higher amount of Brønsted acid sites promoted the ring-opening of furfural alcohol for this cascade reaction. Notably, the introduction of 1,4-dioxane facilitated the in situ formation of furfural (i.e. yield-determining step) by diluting the competitive adsorption behavior between isopropanol and xylose, allowing more xylose molecules to access the active center, thus promoting the sequential production of GVL with unexpectedly high yield. The present work provides a efficient and straightforward preparation of GVL from xylose, paving the pathway towards higher atom economy.
研究领域:
催化
·
绿色化学
·
生物质转化
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ORGANIC CHEMISTRY
·
2020
·
IF 4.335
Ling Tang,Qin Yang,Jianfang Zhang,Guisheng Deng
A regioselective reverse strategy for the construction of eight-membered sulfur-containing heterocycle-fused γ-pyrones and 2-(1,4-dithianyl)-4-pyrones starting from 2-diazo-γ-pyrones and dithioacetals was achieved for the first time. The process combines C–S bond formation via sulfur ylides and C–C bond formation via electron transfer to afford the target molecules in a facile manner with 100% regioselectivity and in excellent isolated yields (up to 90%).
研究领域:
有机化学
·
合成化学
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2022
·
IF 6.14
Chengyan Wang,Yangsai Lyu,Jia Li,Li Li,Tingting Li,Jie Yang,Ningning Xing,Xiaolei Zhang
Excessive fluorine can cause a serious threat to human health. It is significant but challenging to develop a straightforward and rapid way to simultaneously detect and remove excess F– from water. Herein, we presented a three-dimensional (3D) hierarchical UiO-66-NH2 nanoparticle/γ-AlO(OH) nanowire hybrid synthesized by a facile biotemplate route for simultaneous detection and removal of F– from water. We elaborately assembled two kinds of materials in a bioinspired 3D hierarchical structure as a functional unit to achieve detection and removal of dual functions. The outer UiO-66-NH2 nanoparticles served as a fluorescent sensor to detect and capture F– via a strong fluorescence enhancement effect caused by the electron transfer from F– and γ-AlO(OH) and acted as the capture unit of F–. The inner γ-AlO(OH) nanowire layer served as a F– absorbent through ion exchange between F– and γ-AlO(OH). The resulting UiO-66-NH2 nanoparticle/γ-AlO(OH) nanowire hybrid displayed excellent selectivity and sensitivity for F– detection (the detection range was 0–5 mM and the limit of detection was as low as 0.77 μM) and high capacity for F– removal (the maximum equilibrium adsorption capacity qmax was as high as 87.0 mg g–1). This dual-function material provided a strategy for simultaneously selective sensing and efficient removal of anionic pollutants from water.
研究领域:
环境科学
·
材料科学
·
化学
✓ 已验证
DOI
高影响因子
RENEWABLE ENERGY
·
2024
·
IF 9
Hongjin Qu,Tianliang Lu,Xiaomei Yang,Lipeng Zhou
Tin-containing β zeolite exhibits excellent catalytic performance in various biomass conversions to high-value chemicals due to its strong Lewis (L) acidity produced by framework Sn 4+ sites. However, it is difficult to incorporate Sn species into the framework of β zeolite due to that the ionic radius of Sn (0.69 Å) is larger than that of Si (0.40 Å). Herein, organic additives with carbonyl, hydroxyl , aldehyde or amine groups were used to stabilize Sn species in the gel and framework Sn 4+ in the zeolite. Among all additives, acetone (AC) has the best stabilizing effect on Sn species. The stabilization effect between AC and Sn 4+ sites was observed by FT-IR. The characterization results indicate that more tin species were incorporated into β framework and the L acid density increased due to the complexation between carbonyl group and Sn species. Compared to Sn-β-3d synthesized without additive, the L acid density of Sn-β-AC-3d increased by ∼50% (from 21 μmol g −1 to 34 μmol g −1 ). For the conversion of ethyl levulinate to γ-valerolactone, the reaction reached equilibrium faster over Sn-β-AC-3d than over Sn-β-3d at the investigated reaction temperatures. A yield of 98% was obtained over Sn-β-AC-3d at 110 °C. Besides, Sn-β-AC-3d exhibited good stability and reusability.
研究领域:
催化化学
·
生物质转化
✓ 已验证
产品关联
DOI
高影响因子
Advanced Sensor Research
·
2025
·
IF 3.5
Jiahong Wen,Yaxin Wang,Ruoning Chu,Jinhai Li,Ze Chen,Yongjun Zhang,Xiaoyu Zhao,Qi-Qi Fu
Freon refrigerants, whose leakage will cause serious safety and environmental issues, have an urgent need of developing leakage detection technologies. Conventional metal oxide semiconductor (MOS) gas sensors exhibit limited efficacy in detecting halogenated Freons due to their chemical inertness and weak charge-transfer interactions. While recent innovations employing mesoporous γ-Al 2 O 3 overlayers have enabled Freon detection via catalytic decomposition sensing mechanism, the achieved sensing performance remains suboptimal. In this work, this issue is addressed by engineering a Pd-doped mesoporous γ-Al 2 O 3 /SnO 2 (Pd-γ-Al 2 O 3 /SnO 2 ) gas sensor. The doped Pd atoms not only accelerate the decomposition of Freon molecules on the catalytic layer but also induce the Schottky-barrier effect in the SnO 2 sensing layer. Benefiting from the synergistic effect, the Pd-γ-Al 2 O 3 /SnO 2 gas sensor shows outstanding response, good stability, repeatability, selectivity, and rarely-reported universality in sensing different Freon gases. Notably, a valuable solution is demonstrated in the leakage detection of next-generation refrigerants, Freon R1234yf. The sensing mechanism is deduced by exhaust gas components identification. These results highlight the promising potential for addressing the real-world needs of Freon refrigerant leakage detection technology.
研究领域:
材料科学
·
化学传感器
·
环境监测
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Nano
·
2024
·
IF 15.8
Hanchen Shen,Lidong Du,Changhuo Xu,Bingzhe Wang,Qingqing Zhou,Ruquan Ye,Ryan T. K. Kwok,Jacky W. Y. Lam,Guichuan Xing,Jianwei Sun,Tzu-Ming Liu,Ben Zhong Tang
Activity-based detection of γ-Glutamyltranspeptidase (GGT) using near-infrared (NIR) fluorescent probes is a promising strategy for early cancer diagnosis. Although NIR pyridinium probes show high performance in biochemical analysis, the aggregation of both the probes and parental fluorochromes in biological environments is prone to result in a low signal-to-noise ratio (SBR), thus affecting their clinical applications. Here, we develop a GGT-activatable aggregate probe called OTBP-G for two-photon fluorescence imaging in various biological environments under 1040 nm excitation. By rationally tunning the hydrophilicity and donor–acceptor strength, we enable a synergistic effect between twisted intramolecular charge transfer and intersystem crossing processes and realize a perfect dark state for OTBP-G before activation. After the enzymatic reaction, the parental fluorochrome exhibits bright aggregation-induced emission peaking at 670 nm. The fluorochrome-to-probe transformation can induce 1000-fold fluorescence ON/OFF ratio, realizing in vitro GGT detection with an SBR > 900. Activation of OTBP-G occurs within 1 min in vivo, showing an SBR > 400 in mouse ear blood vessels. OTBP-G can further enable the early detection of pulmonary metastasis in breast cancer by topically spraying, outperforming the clinical standard hematoxylin and eosin staining. We anticipate that the in-depth study of OTBP-G can prompt the development of early cancer diagnosis and tumor-related physiological research. Moreover, this work highlights the crucial role of hydrophilicity and donor–acceptor strength in maximizing the ON/OFF ratio of the TICT probes and showcases the potential of OTBP as a versatile platform for activity-based sensing.
研究领域:
生物医学工程
·
肿瘤学
·
分子影像学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER INTERNATIONAL
·
2022
·Vol. 71
·期 11
·1278-1286
·
IF 3.213
Miao Dai,Siyuan Li,Yan Cui,Wei Zhang,Hui Shi,Kai Pan,Wei Wei,Xiaoya Liu,Xiaojie Li
Although magnesium (Mg) and its alloys are promising biodegradable materials for orthopedic implants, rapid and uncontrollable degradation of Mg is still a challenge for clinical applications. In this work, electroactive polymer coatings were prepared to improve the corrosion resistance and cytocompatibility of Mg alloys. Amphiphilic electroactive tetraaniline (TANi)-conjugated poly( γ -glutamic acid) ( γ -PGA) with various TANi modification rates ( γ -PGA–TANi 10 , γ -PGA–TANi 20 , γ -PGA–TANi 27 ) were first synthesized. γ -PGA–TANi colloidal particles, prepared by a self-assembly method, were then coated on Mg alloys by electrophoretic deposition. The prepared γ -PGA–TANi coatings showed a homogeneous surface and good adhesion on AZ31 Mg alloys. Electrochemical analysis and in vitro immersion tests revealed that γ -PGA–TANi-coated Mg exhibited superior corrosion resistance, which was mainly attributed to the electroactivity of the γ -PGA–TANi coatings, leading to the rapid formation of a passivation layer to prevent the further corrosion of Mg alloys. Furthermore, the γ -PGA–TANi alloy coatings efficiently regulated Mg 2+ release and pH value of coated Mg alloy during immersion for 40 days. In comparison with bare Mg alloy, the coated Mg alloy also showed better cytocompatibility, where L929 cells emerged with a good cell adhesion and viability. These results indicate that electroactive γ -PGA–TANi coatings have promising potential for corrosion resistance of Mg alloys. © 2022 Society of Industrial Chemistry.
研究领域:
材料科学
·
生物医学工程
·
腐蚀科学
·
表面工程
✓ 已验证
DOI
高影响因子
JOURNAL OF CEREAL SCIENCE
·
2024
·
IF 3.9
Huiling Yan,Hongxu Chen,Juan Liu,Tian Yao,Mengying Xia,Qingxia Liao,Ludong Huang,Wanjie Li,Yu Song,Lianxin Peng,Jianglin Zhao,Liang Zou,Gang Zhao
s γ-Aminobutyric acid (GABA), a main inhibitory neurotransmitter, is essential for various biofunctions but is inadequately synthesized by the body. Tartary buckwheat (TB), with its medicinal and culinary uses, is a potential GABA source, yet its natural GABA content is low. Herein, the application of pyridoxal phosphate (PLP) led to a significant increase in GABA content, reaching 3.82 g kg -1 in PLP-treated germinated TB (PLP-GTB), which is a 9.67-fold increase compared to ungerminated TB (UTB). This elevation in GABA was associated with the activation of glutamate decarboxylase (GAD), an increase in the substrate glutamate (Glu), and the up-regulation of key gene expression ( GAD , GS1/2 and GOGAT ). Furthermore, PLP-GTB displayed the strongest inhibitory effect on angiotensin-converting enzyme (ACE) activity and exhibited the highest levels of DPPH and ABTS radical scavenging capabilities. Collectively, our findings present a strategy for GABA enrichment in TB, potentially enhancing its anti-hypertensive and antioxidant properties.
研究领域:
农业
·
食品科学
·
营养学
·
生物化学
✓ 已验证
产品关联
DOI
高影响因子
FOOD RESEARCH INTERNATIONAL
·
2025
·
IF 8
Kangyu Zhao,Mengfei Xie,Xin Long,Ping Lan,Zizhe Cai,Yong Wang
The Maillard reaction during the foods processing and hot-pressed oils period generates potential antioxidant compounds that, along with endogenous antioxidants, enhance oxidation stability of oil. This study specifically investigated the interaction between 1-(1 H -imidazole [4,5-C]pyridine-4-yl) ethenone (IMPE), a Maillard reaction product (MRP) isolated from a fructose-histidine system, and γ-tocopherol, the primary endogenous antioxidant in flaxseed oil. The results revealed a significant synergistic antioxidant effect between IMPE and γ-tocopherol. Accelerated oxidation tests (Schaal oven, Rancimat analyses) demonstrated that IMPE/γ-tocopherol mixture exhibited an extended oxidation induction period (7.84 h), substantially exceeding the additive effect expected from IMPE (4.12 h) and γ-tocopherol (5.01 h) individually, resulting in a synergistic degree (SD) of 1.25. Furthermore, density functional theory (DFT) calculations at the B3LYP/6–311+G(d,p) level revealed that the primary mechanism underlying this synergy is the regeneration of γ-tocopherol by IMPE, a finding corroborated by experimental degradation assays. These results elucidate a molecular mechanism for MRP-endogenous antioxidant interactions and provide valuable insights for designing effective composite antioxidant systems, particularly for enhancing the stability of hot-pressed oils.
研究领域:
食品化学
·
抗氧化研究
·
油脂科学
·
化学生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
·
2020
·
IF 3.905
Yanshuxian Liu,Yilei Fan,Zhongping Huang,Huijun Liu,Lili Wang,Zhenlu Shen,Ichi Watanabe
A novel method based on on-line pyrolytic methylation-gas chromatography/mass spectrometry was established and applied into rapid determination of γ-hydroxybutyric acid (GHB) in human hair. With the pyrolytic methylation by tetramethylammonium hydroxide (TMAH), GHB was converted into its corresponding methyl ester in the pyrolyzer at 500 °C. Thus, GHB in hair samples could be well determined by GC/MS on a capillary column in SIM mode. To obtain optimum methylation conditions, important factors were investigated and then applied to the following experiments. The results were obtained as following: 500 °C as reaction temperature, 2:1 as the proportion of TMAH to GHB. The achieved calibration curve exhibited good linearity with the correlation coefficient of 0.9997 at the concentraion range of 2−200 ng/mg, and relative standard deviation (n = 3) from 1.3 %–7.7 %. The limit of detection and the limit of quantification were down to 0.3 ng/mg and 1.0 ng/mg, respectively. The precision ranged from 2.0 %–7.9 % and the recovery ranged from 98.5 %–107.4 %. The results of on-line pyrolytic methylation-GC/MS were in agreement with those observed by the referenced off-line silylation-GC/MS method. The method was applied to a real case of a woman addicted to GHB, the drug concentration in hair segments of 0−5 cm and 5−10 cm from the root strand well correlated with the use of GHB in different periods of her life. The proposed method demonstrated significant potential in the application of rapid determination for GHB in human hair.
研究领域:
法医毒理学
·
药物代谢
·
分析化学
·
生物样本分析
·
临床化学
✓ 已验证
DOI
高影响因子
FUEL
·
2025
·
IF 7.5
Jianping Ding,Xiaoyan Zhou,Zhengzheng Yang,Changgeng Liu,Mingchao Sun,Congling Yang,Lu Fan
In this study, a novel strategy was proposed for synthesizing dual single-atom Ce-Ti catalysts supported on γ-Fe 2 O 3 via ball milling and calcination. Compared to γ-Fe 2 O 3 and single-atom Ce/γ-Fe 2 O 3 and Ti/γ-Fe 2 O 3 catalysts, the Ce-Ti/γ-Fe 2 O 3 catalyst exhibits superior NO conversion rates and significantly enhanced tolerance to H 2 O and SO 2 at 200–240 °C. These advancements are attributed to the synergistic interactions between Ce and Ti, which enhance redox properties, increase Lewis acid site density, and facilitate the Langmuir-Hinshelwood reaction pathway. In-situ DRIFTS and density functional theory (DFT) analyses revealed the mechanistic role of surface-active oxygen species and intermediate formation in promoting the SCR reaction. The findings provide valuable mechanistic insights and establish a scalable approach for the development of high-performance, environmentally friendly catalysts for industrial NO x removal.
研究领域:
催化化学
·
环境科学
·
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）