CHINESE JOURNAL OF CATALYSIS
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2025
·
IF 17.7
Jie Tuo,Zhenteng Sheng,Xianchen Gong,Qi Yang,Peng Wu,Hao Xu
Selective synthesis of value-added xylenes and para -xylene (PX) by CO 2 hydrogenation reduces the dependence on fossil resource and relieves the environment burden derived from the greenhouse gas CO 2 . Herein, modified MCM-22 zeolite combined with ZnCeZrO x solid solution is reported to catalyze the tandem CO 2 hydrogenation and toluene methylation reaction at a relatively low temperature (< 603 K), showing xylene selectivity of 92.4% and PX selectivity of 62% (PX/X, 67%) in total aromatics at a CO 2 conversion of 7.7%, toluene conversion of 23.6% and low CO selectivity of 11.6%, as well as giving high STY of xylene (302.0 mg·h –1 ·g cat –1 ) and PX (201.6 mg·h –1 ·g cat –1 ). The outstanding catalytic performances are closely related to decreased pore sizes and eliminated external surface acid sites in modified MCM-22, which promoted zeolite shape-selectivity and suppressed secondary reactions.
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DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2025
·
IF 17.7
Xinyue Tan,Minghui Zhang,Yang Bai,Xiaoyu Liu,Jianfang Jing,Yiguo Su
The major challenge in photocatalytic water splitting lies in water oxidation reactions, which still suffer from poor charge separation. This study overcame inefficient charge separation by establishing a robust interfacial electric field through the electrostatic-driven assembly of Co 3 O 4 nanoparticles with a perylene imide supramolecule (PDINH). The well-aligned band structures and intimate interfacial contact in the PDINH/Co 3 O 4 heterostructure create an enhanced interfacial electric field that is 4.1- and 53.2-fold stronger than those of individual PDINH and Co 3 O 4 , thus promoting directional charge separation and transfer. Moreover, S-scheme charge transfer strongly preserves the oxidative holes in PDINH to drive efficient water oxidation reactions. Consequently, PDINH/Co 3 O 4 composite achieves a photocatalytic oxygen evolution rate of 29.26 mmol g –1 h –1 under visible light irradiation, 8.2-fold improvement over pristine PDINH, with an apparent quantum yield of 6.66% at 420 nm. This study provides fundamental insights into interfacial electric field control for the development of high-performance organic photocatalysts for efficient water oxidation.
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高影响因子
Chinese Journal of Natural Medicines
·
2025
·
IF 4.9
Yang Liu,Quanwei Sun,Xuefei Xu,Mengmeng Li,Wenheng Gao,Yunlong Li,Ye Yang,Dengke Yin
Ulcerative colitis (UC) is a chronic inflammatory disorder with a complex etiology, characterized by intestinal inflammation and barrier dysfunction. Platycodon grandiflorus polysaccharides (PGP), the primary component of Platycodon grandiflorus , and hesperidin (Hesp), a prominent active component in Citrus aurantium L. (CAL), have both demonstrated anti-inflammatory properties. This study aims to elucidate the underlying mechanism of the synergistic effect of PGP combined with Hesp on UC, focusing on the coordinated interaction between the phosphatidylinositol 3-kinase (PI3K)/protein kinase B (AKT) and Janus kinase 2 (JAK2)/signal transducer and activator of transcription 3 (STAT3) signaling pathways. A mouse model of UC induced by dextran sulfate sodium (DSS) and a cell model using lipopolysaccharide (LPS)-induced RAW264.7/IEC6 cells were employed to investigate the in vitro and in vivo anti-inflammatory effects of PGP combined with Hesp on UC and its potential mechanism of action. The results indicated that compared to the effects of either drug alone, the combination of PGP and Hesp significantly modulated inflammatory factor levels, inhibited oxidative stress, regulated colonic mucosal immunity, suppressed apoptosis, and restored intestinal barrier function in vitro and in vivo . Further in vitro studies revealed that PGP significantly inhibited the PI3K/AKT signaling pathway, while Hesp significantly inhibited the JAK2/STAT3 signaling pathway. The use of inhibitors and activators targeting both pathways validated the synergistic effects of PGP combined with Hesp on the PI3K/AKT and JAK2/STAT3 signaling pathways. These findings suggest that PGP combined with Hesp exhibits a synergistic effect on DSS-induced colitis, potentially mediated through the phosphatase and tensin homolog (PTEN)/PI3K/AKT and interleukin-6 (IL-6)/JAK2/STAT3 signaling pathways.
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DOI
PubMed
高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2025
·
IF 17.7
Ye Wang,Pan Gao,Dan Zhao,Tongrui Liu,Sitong Zhou,Miao Yang,Shiping Liu,Bing Li,Yida Zhou,Wenhao Cui,Guangjin Hou,Peng Tian,Zhongmin Liu
Silicoaluminophosphate (SAPO) molecular sieves possess diverse architectures and exceptional high-temperature hydrothermal stability, rendering them important acid catalysts. However, enhancing acid concentration of certain SAPO materials remains challenging, which limits their catalytic applications. Here, we report the synthesis of a series of SAPO materials using a developed SAPO precursor plus dual template (SPDT) strategy. A variety of SAPO materials characterized by high silica content and enhanced acidity, such as SAPO-34/56 intergrowths, SAPO-56, and SAPO-17, have been synthesized and thoroughly characterized using various techniques including integrated differential phase-contrast scanning transmission electron microscopy, two-dimensional solid-state nuclear magnetic resonance spectroscopy, and continuous rotation electron diffraction. The use of silica-enriched SAPO precursor combined with the flexible selection of the second template enables the crystalline phase regulation and improves the Si atoms incorporation into the framework. Notably, the synthesized SAPO-17 with abundant Si(4Al) species and unprecedentedly high acid density exhibits exceptional DeNO x activity after Cu loading, with NO x conversion exceeding 90% at 175–700 °C. This outstanding performance can be attributed to the unique ERI structure and the increased acidity of SAPO-17. This work not only presents an effective method for synthesizing SAPO molecular sieves with enhanced acidity but also offers a new perspective for expanding the active temperature range of the ammonia selective catalytic reduction reaction.
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高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2025
·
IF 17.7
Xianquan Li,Jifeng Pang,Yujia Zhao,Lin Li,Wenguang Yu,Feifei Xu,Yang Su,Xiaofeng Yang,Wenhao Luo,Mingyuan Zheng
The catalytic synthesis of 1,3-butadiene (1,3-BD) from bio-based ethanol offers an alternative and sustainable process beyond petroleum. However, the intrinsic active sites and corresponding mechanism of 1,3-BD formation have not been fully elucidated yet. By correlating systematic characterization results with catalytic performance, the open Zr species, i.e., Zr(OH)(OSi) 3 moieties, were identified as the active site over the Zr/MFI-BM catalysts for the catalytic transformation of ethanol-acetaldehyde into 1,3-BD. In conjunction with controlled experiments and theory calculations, ethanol and acetaldehyde are proposed to synergistically co-adsorb on the Zr(OH)(OSi) 3 species in a bi-molecular mode, which assists the acetaldehyde condensation and accelerates the critical Meerwein-Ponndorf-Verley-Oppenauer reduction, and accordingly promotes 1,3-BD formation. These findings will stimulate the search towards new metal-zeolite combinations for efficient production of value-added 1,3-BD via biomass-derived ethanol and beyond.
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高影响因子
Journal of Semiconductors
·
2021
·Vol. 42
·期 7
·072202
·
IF 0
Wenzhe Li,Naveed Ur Rahman,Yeming Xian,Hang Yin,Yunkai Bao,Yi Long,Songyang Yuan,Yangyi Zhang,Yaxuan Yuan,Jiandong Fan
Multifunctional lead-free double perovskites demonstrate remarkable potential towards applications in various fields. Herein, an environmentally-friendly, low-cost, high-throughput Cs2NaFeCl6 single crystal with exceedingly high thermal stability is designed and grown. It obtains a cubic lattice system in the temperature range of 80–500 K, accompanied by a completely reversible chromatic variation ranging from yellow to black. Importantly, the intriguing thermochromism is proved to own extremely high reproducibility (over 1000 cycles) without a hysteretic effect, originating from its structural flexibility that including (i) the noteworthy distortion/deformation of [NaCl6]5− and [FeCl6]3− octahedra; (ii) order–disorder arrangement transition of [NaCl6]5− and [FeCl6]3− octahedra as the function of temperature. This study paves the way towards a new class of smart windows and camouflage coatings with an unprecedented colour range based on a Cs2NaFeCl6 perovskite.
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DOI
CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
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2018
·
IF 0.824
Meng-Fei LAN,Ning AN,Ying ZHAO,Wei CAO,Heng LI,Lan ZHAO,Yong-Dong HUANG,Rong-Yue ZHANG
The macroporous microspheres were prepared through suspension polymerization based on a copolymer of glycidyl methacrylate and ethylene glycol dimethacrylate. The effect of porogen on the microspheres structure was evaluated in terms of pore size and surface area. Porogen contained dichloromethane ( δ = 9.7 (cal cm –3 ) 1/2 ) and N -octanol ( δ = 10.3 (cal cm –3 ) 1/2 ) which were correspond to a good and poor solvent, respectively. The solubility parameter of porogen was controlled in the range of 9.89–10.09 (cal cm –3 ) 1/2 . The pore size of microspheres increased with the increase of difference value of solubility parameter between the polymer and the porogen. On the contrary, the surface area of microspheres decreased. The anion exchange media was prepared through coupling poly(ethylene imine) in the microspheres and the proteins transport was determined by frontal analysis method. The macroporous microspheres with 257 nm pore size could still afford a high proteins capacity (45.1 mg mL –1 ). These macroporous supports showed great potential in rapid separation of proteins.
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高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2014
·
IF 1.552
Qiuhe Ren,Yizheng Huang,Hong Ma,Jin Gao,Jie Xu
The promotion effect of alkali metal halides toward the AlCl 3 -catalyzed conversion of glucose to 5-hydroxymethylfurfural (HMF) was investigated. The results show that NaF inhibited the reaction. However, NaI and NaBr promoted the reaction significantly, and the promotion effect of NaI was more obvious than that of NaBr. In N , N -dimethylacetamide (DMAC), when NaI was used as an additive for the AlCl 3 -catalyzed conversion of glucose at 130 °C for 15 min, glucose conversion increased from 71% to 86%, and the HMF yield increased from 36% to 62%. The AlCl 3 -NaI-DMAC system could also be used for the catalytic conversion of other carbohydrates such as fructose, mannose, sucrose, maltose , cellobiose, and inulin to HMF. When sucrose was used as the feedstock, a 63% HMF yield was achieved.
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高影响因子
Journal of Integrative Agriculture
·
2018
·
IF 1.042
Zhen YAN,Li-jing ZHENG,Ji-yun NIE,Zhi-xia LI,Yang CHENG
In order to establish grading standards of evaluation indices for sour flavor of apples, 10 indices of samples from 106 apple cultivars were tested, including: malic acid (Mal), oxalic acid (Oxa), citric acid (Cit), lactic acid (Lac), succinic acid (Suc), fumaric acid (Fum), total organic acids (ToA, the sum of the six organic acids tested), titratable acid (TiA), acidity value (AcV), and pH value. For most of the cultivars studied (85.8%), the order of the organic acid contents in apples was Mal>Oxa>Cit>Lac>Suc>Fum. Mal was the dominant organic acid, on average, accounting for 94.5% of ToA. Among the 10 indices, the dispersion of pH value was the smallest with a coefficient of variation of only 8.2%, while the coefficients of variation of the other nine indices were larger, ranging between 31 and 66%. There were significant linear relationships between Mal and two indices (ToA and AcV) as well as between ToA and AcV. There were significant logarithmic relationships between pH value and four indices: Mal, TiA, ToA, and AcV. All the equations had very high fitting accuracy and can be used to accurately predict related indices. According to this study, Mal, ToA, and AcV of apple were normally distributed, TiA was close to normally distributed, whereas pH value had a skewed distribution. Using the fitted normal distribution curves, the grading standards of Mal, TiA, ToA, and AcV were established. The grading node values of pH value were obtained using the logarithmic relationship between pH value and Mal. The grading standards of these five indices can be used to evaluate the sour flavor of apple. This study provides a scientific basis for evaluating apple flavor and selecting apple cultivars.
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高影响因子
CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
·
2017
·
IF 0.795
Fu-Xing XU,Qian-Kun DANG,Hang-Yu DING,Zheng-Xu HUANG,Yuan-Yuan WANG,Zhen ZHOU,Chuan-Fan DING
Ion trap performances were investigated based on digital ion trap technology with different collision gases and their pressures. Collision gases of helium ( M = 4 amu), nitrogen ( M = 28 amu) and argon ( M = 40 amu) with various pressures were adopted in ion excitation and dissociation stages for comparing the ion trap performances, including mass resolution, signal intensity, analysis ability of tandem mass spectrometric and low-mass cut off (LMCO) effect. The results indicated that when argon was used, the kinetic energy could be efficiently transferred and the LMCO effect was improved with higher ion capture and dissociation efficiencies except lower mass resolution. Higher mass resolution was realized with helium as collision gas. Furthermore, at the same gas pressure, heavier gas was beneficial to abundant fragment ions and structural information of precursor ion.
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高影响因子
Materials Research Express
·
2016
·Vol. 3
·期 7
·075013
·
IF 0.968
Chunyuan Song,Yuhan Wei,Bingtao Da,Haiting Zhang,Xing Cong,Boyue Yang,Yanjun Yang,Lianhui Wang
Surface-enhanced Raman scattering (SERS) has recently received considerable attention as an ultrasensitive analytic technique. However, its wide application is limited by lack of excellent SERS-active substrates. In this work a SERS substrate with arrayed monolayer films of porous gold nanoparticles is prepared on a solid substrate by a facile, in situ and one-step growth approach. Specifically, the solid substrate was coated with a layer of dense positive charges first by layer-by-layer assembly, followed by patterned a PDMS film with arrayed wells on the substrate. Then the growth solution including chlorauric acid, cetyltrimethylammonium chloride, and ascorbic acid in a certain proportion was transferred into the wells for in situ and one-step growth of porous gold nanoparticles on the substrate. The growth time, feed ratio of the reagents, and repeat times of the in situ growth were studied systematically to obtain optimal parameters for preparing an optimal SERS substrate. The as-prepared optimal SERS substrate not only has good SERS performance with the enhancement factor up to ∼1.10 × 106, but also shows good uniformity and stability. The SERS substrate was further utilized to be ultrasensitive SERS-based chemical sensors for ppb-level detection of highly toxic dyfonate. The preliminary result indicates that the as-prepared SERS substrate has good SERS performance and shows a number of great potential applications in SERS-based sensors.
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高影响因子
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
·
2018
·
IF 1.795
Cai-xia WANG,Hui-ping HU,Xue-jing QIU,Ze-ying CHENG,Lu-jia MENG,Li ZHU
A novel silica-supported tert-butyl 2-picolyamino-N-acetate chelating resin (Si-AMPY-1) was successfully synthesized and characterized by elemental analysis, FT-IR, SEM and 13 C CP/MAS NMR. The adsorption behaviors of the Si-AMPY-1 resin for Cu(II) and Ni(II) were studied with batch and column methods. The batch experiments indicated that the Si-AMPY-1 resin adsorbed Ni(II) mainly via physisorption, while adsorbed Cu(II) via chemisorption. The column dynamic breakthrough curves revealed that the Si-AMPY-1 resin can efficiently separate Cu(II) from the simulated nickel electrolyte before the breakthrough point. Moreover, the concentration of Cu(II) in the column effluent was decreased to be less than 3 mg/L within the first 43 BV (bed volumes), and the mass ratio of Cu/Ni was 21:1 in the saturated resin, which completely satisfied the industrial requirements of the nickel electrorefining process. Therefore, it was concluded that the Si-AMPY-1 resin can be a promising candidate for the deep removal of Cu(II) from the nickel electrolyte.
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高影响因子
危险品化学品经营许可证（带存储）