MICROPOROUS AND MESOPOROUS MATERIALS
·
2016
·
IF 3.349
Xiaopeng Zhang,Hua Wang,Xiao Liu,Jinyu Han,Xinli Zhu,Qingfeng Ge
Co/NaY catalysts prepared by impregnation of NaY with a cobalt nitrate-ethanol solution were used to catalyze liquid-phase hydrogenation of ethyl lactate to 1,2-propanediol (1,2-PDO). To elucidate the effect of calcination conditions and cobalt loading, the catalysts were characterized using XRD , N 2 physical adsorption, H 2 -TPR, XPS , H 2 -TPD, and TEM . The results show that both high calcination temperature and high amount of Co loading result in relatively large Co 3 O 4 particles. The reduced cobalt catalysts consist of three cobalt species, including metallic Co, cobalt oxides and cobalt species interacting with zeolite (cobalt aluminate/silicate), due to incomplete reduction of cobalt species. The absence of the characteristic peak of metallic Co in the XRD pattern confirms its high dispersion on NaY, in agreement with the TEM results. H 2 -TPD effectively quantifies the number of surface metallic Co sites, which correlates linearly with the ethyl lactate conversion. This correlation indicates that metallic Co is the active site for ethyl lactate hydrogenation. A complete conversion of ethyl lactate with a selectivity of 96% to 1,2-PDO has been achieved over the 6Co/NaY-673-5 catalyst.
研究领域:
催化化学
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材料科学
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产品关联
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2018
·
IF 2.21
Hanyu Yao,Honglie Shen,Quntao Tang,Jiaqi Peng,Rui Liu
The fluorescence-based temperature sensor using temperature-dependent fluorescence properties is a great candidate to replace traditional temperature-measurement detector like thermocouple , because the latter is inaccessible to conquer some special circumstances such as a corrosive environment. In this study, the nano-sized Er 3+ doped NaY(WO 4 ) 2 phosphors were synthesized by solvothermal method. The origins of three emission peaks located at 527 nm, 549 nm and 665 nm were identified. The 2 H 11/2 → 4 I 15/2 (green emission 1) and 4 S 3/2 → 4 I 15/2 (green emission 2) transitions of the Er 3+ ion possessed a temperature dependent behavior over the range of 300–30 K and it was proposed for temperature sensing (optical thermometry) using the fluorescence intensity ratio (FIR) method. The FIR value of nano-sized phosphors decreased with the decrease of temperature, and the experimental data were well fitted with a theoretical function. A large energy difference (1048.5) was obtained from the fitting curve, which indicate that the sensitivity of nano-sized NaY(WO 4 ) 2 : Er is higher than that of micro-sized one prepared by high temperature solid state reaction. Particularly, at temperatures below 150 K, the sensitivity of nano-sized UC phosphors was enhanced obviously. The results suggested that this nano-sized phosphor could be a splendid option for next generation luminescence-based temperature sensing devices in cryogenic region.
研究领域:
材料科学
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光学
·
传感器技术
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DOI
高影响因子
Journal of Pharmaceutical Analysis
·
2023
·
IF 8.8
Congcong Ma,Yanwei Li,Jie Li,Lei Song,Liangyu Chen,Na Zhao,Xueping Li,Ning Chen,Lixia Long,Jin Zhao,Xin Hou,Li Ren,Xubo Yuan
Proteomic characterization of plasma is critical for the development of novel pharmacodynamic biomarkers. However, the vast dynamic range renders the profiling of proteomes extremely challenging. Here, we synthesized zeolite NaY and developed a simple and rapid method to achieve comprehensive and deep profiling of the plasma proteome using the plasma protein corona formed on zeolite NaY. Specifically, zeolite NaY and plasma were co-incubated to form plasma protein corona on zeolite NaY (NaY-PPC), followed by conventional protein identification using liquid chromatography-tandem mass spectrometry. NaY was able to significantly enhance the detection of low-abundance plasma proteins, minimizing the “masking” effect caused by high-abundance proteins. The relative abundance of middle- and low-abundance proteins increased substantially from 2.54% to 54.41%, and the top 20 high-abundance proteins decreased from 83.63% to 25.77%. Notably, our method can quantify approximately 4000 plasma proteins with sensitivity up to pg/mL, compared to only about 600 proteins identified from untreated plasma samples. A pilot study based on plasma samples from 30 lung adenocarcinoma patients and 15 healthy subjects demonstrated that our method could successfully distinguish between healthy and disease states. In summary, this work provides an advantageous tool for the exploration of plasma proteomics and its translational applications.
研究领域:
蛋白质组学
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生物标志物发现
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质谱分析
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癌症研究
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临床蛋白质组学
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Zhenwei Lu,Keqiang Zhang,Fuyuan Liu,Xingliang Gao,Zhongwei Zhai,Jiajia Li,Lianzhu Du
Currently, the closure of the nutrient circular loop and contaminant removal from wastewater are drawing widespread attention. In this study, a novel MgO/iron oxide-modified NaY zeolite (MNZ) was prepared and used for the integration of adsorption and struvite precipitation to simultaneously reclaim ammonium and phosphate from wastewater. The results proved that MgO and iron oxide nanoparticles were successfully embedded in the zeolite matrix, providing high adsorption performance for ammonium and phosphate, reaching 380.02 (as NH + 4) and 324.68 (as P T ) mg/g, respectively. The presence of NO 3 − , Cl − , SO 4 2− , and HCO 3 − did not significantly influence the adsorption of ammonium and phosphate. Struvite precipitation on the MNZ surface is the primary mechanism for the recovery of both ammonium and phosphate with electrostatic attraction and ion exchange also involved in ammonium uptake. These results indicate that optimized MNZ is promising for nutrient recovery from wastewater because of its high selectivity for targeted absorbates and its potential application as a slow-release eco-fertilizer.
研究领域:
环境工程
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水处理
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材料科学
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废物管理
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DOI
高影响因子
CHEMOSPHERE
·
2024
·
IF 8.1
Yalong Duan,Ruxia Zhang,Pengfei Han,Ngie Hing Wong,Jaka Sunarso,Shaomin Liu,Jiang Yu
This work reports the ion exchange fabrication of maghemite (γ-Fe 2 O 3 ) modified NaY zeolite (Fe 2 O 3 @Y) with bifunction of adsorption and catalysis. The Fe 3+ successfully replaced the Na + in the β cage of zeolite in the ion exchange process and coordinated with framework oxygens to form magnetic γ-Fe 2 O 3 . Therefore, most of the γ-Fe 2 O 3 particles were confined in the β cages, which resulted in the high dispersal and stability of the catalyst. The Fe 2 O 3 @Y could remove methylene blue (MB) model pollutants up to 59.02 and 61.47% through the adsorption and catalysis process, respectively. The hydrogen bond between the OH − ions around the Fe 2 O 3 @Y surface and the N and O presented in the MB molecules enabled the chemical adsorption to MB, which accorded with the pseudo-second-order kinetic model. Further, the H + existed in the solution and the β cage of zeolite promoted the collapse of micro-nano bubbles (MNBs). Then, the γ-Fe 2 O 3 catalyst would be activated by high temperature and oxidated OH − to produce hydroxyl radicals for pollutant degradation . Thus, pollutant removal was attributed to the combined effects of adsorption and catalysis in the Fe 2 O 3 @Y + MNB system. In this work, the Fe 2 O 3 @Y was demonstrated as a potentially magnetic adsorbent or MNB catalyst for wastewater treatment .
研究领域:
环境科学
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材料科学
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化学工程
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产品关联
DOI
PubMed
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2025
·
IF 4.7
Qiuyun Huang,Shiyu Liu,Weihua Shen,Yunjin Fang
A series of Pd/NaY catalyst with different Pd complexes (Pd(NH 3 ) 4 /NaY, Pd(en) 2 /NaY, Pd(py) 2 /NaY and Pd(NH 2 CH 2 COO) 2 /NaY) were prepared as catalysts for the indirect oxidative carbonylation of methanol to dimethyl carbonate (DMC). The Pd complex ([Pd(en) 2 ] 2+ , [Pd(py) 2 ] 2+ and Pd(NH 2 CH 2 COO) 2 ) were produced as new active components. Among them, the Pd(en) 2 /NaY catalyst performed best with the CO conversion of 41.7 %, the DMC selectivity based on CO of 99.8 % for a 100 h test. On the other hand, the CO conversion decreased from 41.9 % (1 h) to 22 % on Pd(NH 3 ) 4 /NaY catalyst within 56 h reaction. It was found that the Pd(en) 2 /NaY catalyst had homogeneous and steady clusters, which can be attributed to interactions between the ethylenediamine ligands and Pd clusters. This work not only explained the deactivation of Pd/NaY catalyst, but also provide a useful method to stabilize catalysts.
研究领域:
催化化学
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有机合成
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材料化学
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工业化学
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能源化学
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产品关联
DOI
高影响因子
Journal of Materials Chemistry B
·
2018
·Vol. 6
·期 21
·3586-3599
·
IF 4.776
Xiaoqin Chen,Jing Sun,Huan Zhao,Ke Yang,Yuda Zhu,Hongrong Luo,Kui Yu,Hongsong Fan,Xingdong Zhang
For synchronous theranostic systems, there are two areas of focus. These are: excellent in vivo imaging and a multi-drug resistance (MDR) reversing ability for chemotherapy. Upconversion nanoparticles (UCNPs) exhibiting bright red emission in the “optical window in biological tissue (600–1100 nm)” could be a very useful candidate, although there have only been a few reports on UCNP-based conjugates with a MDR reversal ability explored for chemotherapy. Herein, we report an innovative theranostic system (D-UNT) via binding of an antitumor drug (DOX) and a MDR reversal agent (TPGS) to NaY(Mn)F4:Yb/Er UCNPs (UN) with synthetic optimized red emission and properties. The in vitro study demonstrated that the D-UNT was uptaken into drug-resistant MCF-7/ADR cells via caveolin dependent endocytosis and overcame P-gp mediated efflux. The cytotoxicity was significantly promoted to be much higher than that of free DOX. Accordingly, our D-UNT illustrates an enhanced reversal ability for chemotherapy. Our in vivo study further indicated that the D-UNT had excellent therapeutic efficacy against MDR tumors with minimal organ toxicity detected. In vivo deep-tissue imaging showed that the D-UNT accurately diagnosed MDR tumors at a 1.5 cm depth with high-contrast luminescent signals. Thus, the D-UNT is an effective theranostic system for the diagnosis and therapeutic treatment of MDR tumors. The present work opens new pathways to engineering powerful theranostic agents to simultaneously target, image and kill deep-tissue MDR tumor cells.
研究领域:
纳米技术
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癌症研究
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药学科学
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2025
·
IF 3.7
Fu Rao,Wenkang Deng,Chenghao Liu,Xiaofeng Xie,Chunfa Liao,Tao Qi,Guoping Hu
Sodium Y (NaY) zeolite is a promising adsorbent for carbon capture. The template-free synthesis of NaY zeolite has gained considerable interests to minimize its costs and environmental effects. However, NaY zeolites synthesized through template-free methods exhibited lower CO 2 adsorption capacities (∼4.07 mmol·g –1 ) compared to template-assisted counterparts, often requiring longer crystallization time and higher energy penalty. This study systematically compared the microstructural characteristics and CO 2 adsorption performance of NaY zeolites synthesized with and without templates, including those from the commercial markets. Through process optimization, the CO 2 adsorption capacity of the template-free NaY zeolite was significantly enhanced, surpassing those template-assisted samples. Notably, it achieved CO 2 adsorption capacities of 6.51 mmol·g –1 at 25 °C and 0.1 MPa, and 7.40 mmol·g –1 at 0 °C and 0.1 MPa, outperforming both commercial NaY and template-assisted samples. The structural differences, including crystal integrity, pore size distribution and surface properties, were systematically discussed. The optimized synthesis method increased the specific surface area and the ratio of microporous structures. The template-free NaY also showed superior CO 2 capture capacity, moisture resistance, breakthrough performance and stability, indicating its application potential for carbon capture.
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DOI
高影响因子
Membranes
·
2023
·Vol. 13
·期 11
·858
·
IF 4.2
Qing Wang,Huiyuan Chen,Feiyang He,Qiao Liu,Nong Xu,Long Fan,Chuyan Wang,Lingyun Zhang,Rongfei Zhou
In this study, high-performance FAU (NaY type) zeolite membranes were successfully synthesized using small-sized seeds of 50 nm, and their gas separation performance was systematically evaluated. Employing nano-sized NaY seeds and an ultra-dilute reaction solution with a molar composition of 80 Na2O: 1Al2O3: 19 SiO2: 5000H2O, the effects of synthesis temperature, crystallization time, and porous support (α-Al2O3or mullite) on the formation of FAU membranes were investigated. The results illustrated that further extending the crystallization time or increasing the synthesis temperature led to the formation of a NaP impurity phase on the FAU membrane layer. The most promising FAU membrane with a thickness of 2.7 µm was synthesized on an α-Al2O3support at 368 K for 8 h and had good reproducibility. The H2permeance of the membrane was as high as 5.34 × 10−7mol/(m2s Pa), and the H2/C3H8and H2/i-C4H10selectivities were 183 and 315, respectively. The C3H6/C3H8selectivity of the membrane was as high as 46, with a remarkably high C3H6permeance of 1.35 × 10−7mol/(m2s Pa). The excellent separation performance of the membrane is mainly attributed to the thin, defect-free membrane layer and the relatively wide pore size (0.74 nm).
研究领域:
材料科学
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化学工程
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产品关联
DOI
PubMed
高影响因子
Inorganic Chemistry Frontiers
·
2022
·Vol. 9
·期 10
·2182-2193
·
IF 7.779
Peng Liu,Tian Xia,Suofu Nie,Qiaoxia Guo,Chunming Xu,Baojian Shen
Y zeolite is presently used as an important active component in oil refining catalysts. The efficient synthesis of NaY zeolite still faces many huge challenges. Herein, a novel method for the rapid synthesis of nano-plate-like small crystal-sized NaY zeolite through an artificial-fish-reef-breeding negative crystal strategy is reported. It was discovered that cationic polyacrylamide (CPAM) could act as an artificial fish-reef to breed negative crystals, which promoted NaY zeolite nucleation and accelerated the crystallization of NaY zeolite. The crystallization time of NaY zeolite was shortened by 9 h. The relevant crystallization mechanism was investigated. Nano-plate-like (10–50 nm) small-sized (100–200 nm) NaY zeolite crystals with exceptional thermal stability and a large total volume (0.447 cm3 g−1) were synthesized. After steam treatment, the nano-plate-like small-sized USY-CPAM zeolites possessed reasonable acid sites distribution, endowing them with superior cracking activity for heavy reactant molecules.
研究领域:
材料科学
·
催化化学
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 27
·1-12
·
IF 2.8
Zhang Wei,Qin Lizhong,Qi Xiaohui,Na Liyan,Hua Ruinian
Photocatalytic hydrogen evolution on specific semiconductor material has been the most promising method to meet the future energy demands. To increase the efficiency of the photocatalysis, the β -NaY(Gd)F 4 :Yb 3+ ,Er 3+ @W 18 O 49 nanocomposites were successfully synthesized by a two-step hydrothermal method. It can be observed that the as-prepared nanocomposites have a layered structure; the inner layer is hexagonal-phase β -NaY(Gd)F 4 :Yb 3+ ,Er 3+ nanorods, and the outer layer is W 18 O 49 nanowires (NWs). Compared to the W 18 O 49 samples, the nanocomposites show 160% increase in hydrogen production efficiency in a BH 3 NH 3 aqueous solution under 980 nm irradiation. The enhanced photocatalytic activity of the nanocomposites can be attributed to their particular hierarchical structure. The effect of localized surface plasmon resonance (LSPR) on the surface of the W 18 O 49 NWs and the upconversion luminescence of nanorods in inner layer can be simultaneously triggered at 980 nm. Subsequently, the luminescence of the nanorods can be partially absorbed by the W 18 O 49 NWs to re-excite the LSPR oscillation of the nanocomposite. The reexcited LSPR effect improves the photocatalytic efficiency of the nanocomposite.
研究领域:
材料科学
·
化学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING & TECHNOLOGY
·
2026
·Vol. 49
·期 4
·e70205
·
IF 2
Yu-Qing Li,Yuwei Wang,Fei Wang,Hong Chen,Shenghao Yang,Lihong Zhao,Xu Liang,Yuanli Jiang,Feidong Xie,Liutao Hou,Zhenfeng Liu,Jiantang Sun
A structured, chloride-free Pd–Cu/NaY catalyst was developed for the direct synthesis of dimethyl carbonate (DMC) from syngas-derived methyl nitrite and CO. The NaY zeolite support stabilizes Pd(II) species via strong electrostatic interactions, while Cu addition enhances durability by suppressing Pd reduction and aggregation, as confirmed by H 2 -TPR and TEM. Using shaped spherical supports improves DMC selectivity by limiting methyl nitrite decomposition side reactions through diffusion constraints. Under optimized conditions (CO/MN = 1/6, 120°C), the catalyst achieves a DMC space-time yield of 669 g·kg −1 ·h −1 with high selectivity. A 1000 h stability test shows sustained activity above 550 g·kg −1 ·h −1 after an initial run-in period. In situ DRIFTS studies identify the ligand exchange step as rate-determining and elucidate the full reaction pathway. This robust catalytic system demonstrates strong potential for pilot-scale and industrial syngas-to-DMC processes.
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DOI
高影响因子
危险品化学品经营许可证（带存储）