MICROPOROUS AND MESOPOROUS MATERIALS
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2025
·
IF 4.7
Zhang Yanting,Ding Yunlong,Guo Yunya,Wang Wenfeng,Li Xiaofeng,Dou Tao
The development of mesoporogen-free synthetic routes for hierarchical ZSM-5 zeolites is critical to advancing their application in diffusion-constrained catalytic processes such as heavy oil cracking. Here, we develop a mesoporogen-free strategy through synergistic control of seed solution temperature (70-170 °C) and addition amount (0.8-50 wt%). The synthesized zeolites were characterized using techniques such as X-ray Diffraction (XRD), Scanning electron microscope (SEM), Transmission electron microscopy (TEM), N 2 adsorption-desorption, ammonia temperature-programmed desorption (NH 3 -TPD), and pyridine-infrared (Py-IR). The results show that the sample is rich in mesopores and has well-preserved microporosity. Control experiments under TPAOH conditions equivalent to the seed solution addition amounts and with room-temperature-dried seed solids equivalent to the seed solution were conducted to highlight the critical role of seed solutions. Notably, seed solutions stored for three months retained their effectiveness in synthesizing phase-pure ZSM-5 zeolites, demonstrating exceptional stability. In tetralin (heavy oil model) cracking tests, the optimized zeolite (HZ-T100-A50) achieved 90 % conversion within 2 hours, which is 20 % higher than HZ-T100-A0.8, attributed to enhanced reactant accessibility. This study not only provides an eco-friendly method for synthesizing hierarchical ZSM-5 zeolites without mesoporous templates but also deepens the understanding of seed solution impacts, offering an important basis for optimizing zeolites synthesis and application.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Fang Guo,Ping Xiao,Bingyi Yan,Misun Hahn,Yuyu Kong,Wang Zhang,Yuanzhe Piao,Guowang Diao
A novel and simple strategy for one-pot preparation of supramolecular reduced graphene oxide (RGO) hybrid material based on pillar[5]arenes was developed by the redox reaction between graphene oxide (GO) and hydrazide-pillar[5]arene (HP5A, as the reducing agent and stabilizer) in aqueous solution. In this process, no additional reducing agents needed to be added, and no extra modification steps were required after reducing GO. The few-layer RGO-HP5A hybrids fabricated could be dispersed in the water easily and stably. When applied to supercapacitors, this nanocomposite showed a remarkable specific capacitance (331 F·g −1 at 0.5 A·g −1 ) and great rate capability in the three-electrode cell, which benefited from synergistic effect of RGO and HP5A in this nanocomposite. Moreover, the as-prepared symmetric supercapacitor with RGO-HP5A exhibited a high initial capacitance as well as an excellent cycling stability. Thus, the study provided a feasible electrode component for fabrication of supercapacitors with outstanding performance and a potential tool for expanding the development of supramolecular composite in energy storage.
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高影响因子
CATALYSIS LETTERS
·
2024
·Vol. 154
·期 7
·3494-3502
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IF 2.3
Zhou Shuolin,Wen Sha,Xu Qiong,Liu Xianxiang,Yin Dulin
5-Hydroxymethylfurfural (HMF) serves as a versatile platform compound bridging the realms of biomass resources and the fine chemicals industry, with its selective oxidation holding significant value. In this study, nitrogen-doped porous carbon (NDPC) materials were synthesized by using urea as the nitrogen source and sucrose as the carbon source via a hard-template approach. These materials were subsequently employed in the selective oxidation of HMF to produce 2,5-diformylfuran (DFF) under specific oxygen pressure conditions. The morphology and structure of NDPC were elucidated through SEM, XPS and XRD analyses. The impact of varying the molar ratio of N/C and nitrogen sources on the catalyst was examined, as well as the effects of different reaction conditions on HMF conversion and DFF selectivity were investigated. The results demonstrated an impressive 81.0% HMF conversion and a remarkable 97.9% DFF selectivity under the suitable conditions. Furthermore, the catalyst exhibited consistent catalytic performance throughout the recycling experiments. Graphical
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MATERIALS SCIENCE FORUM
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2019
·
IF 0
Ai Jia Wei,Wen Li,Li Hui Zhang,Zhen Fa Liu
Spinel powders of Nd-doped LiNi0.5NdxMn1.5−xO4 with different Nd3+ contents (x = 0, 0.01, and 0.02) have been synthesized by a solid-state ball milling method. The samples was characterized by XRD, SEM and EDS. XRD shows the doping of Nd3+ did not destroy the formation of spinel LNMO.The results show that LiNi0.5Nd0.01Mn1.49O4 sample exhibits a higher rate performance with specific discharge capacities of 134.8, 137.2, 136.5, 130.4, 123.8, 106.4, and 83.1 mAh g−1 at 0.2, 0.5, 1, 2, 3, 5, and 7 C (1 C = 140 mAh g−1), respectively. The results indicate that the Nd3+ doping could reduce the electrode polarization and enhance the rate capacities.
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RSC Advances
·
2017
·Vol. 7
·期 79
·49883-49889
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IF 3.108
Li-Jun Cui,Zhen-Hua Ge,Peng Qin,Jing Feng
Thermoelectric (TE) materials have a promising application as they can interconvert thermal energy to electrical energy directly. Oxide TE materials have attracted more attention for this application due to their high temperature stability. In this work, In2O3(ZnO)5 intrinsic superlattice ceramics with a layered structure were synthesized by reaction sintering a mixed powder of In2O3 and ZnO at 1200 °C for different holding times (t = 6, 8, 10, 12 and 15 h) in air. Their thermoelectric properties including the electrical conductivity, Seebeck coefficient and thermal conductivity, were measured from 323 to 973 K. The thermoelectric properties depended on the holding time. The highest ZT value of 0.19 at 973 K was obtained for the sample with a 12 h holding time.
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高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
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2026
·
IF 5.9
Haochen Zhou,Ting Chen,Qifei Xia,Renjie Zhou,Zhixiang Xie
A dual-shell hierarchical protection strategy combining non-hydrolytic sol-gel derived SnO x coating and mesoporous ZSM-5 encapsulation was proposed to simultaneously boost luminescence efficiency and environmental stability of CsPbBr 3 nanocrystals. • Conformal amorphous SnO x layer uniformly passivates surface defects of CsPbBr 3 , the optimized CsPbBr 3 @SnO x sample achieves a PLQY increase from 64% to 74%, and retains 55% and 47% initial PL intensity after 120 min immersion in water and ethanol, respectively. • Secondary encapsulation within hierarchical micro-mesoporous ZSM-5 further reinforces structural robustness, raising the maximum PLQY of CsPbBr 3 @SnO x @ZSM-5 composite up to 76%. The composite exhibits negligible emission shift after 120 min treatment in water, ethanol and tetrahydrofuran, with outstanding retention of luminescence signal. • White light-emitting diode (WLED) assembled with CsPbBr 3 @SnO x @ZSM-5 green phosphor and commercial red K 2 SiF 6 :Mn 4+ phosphor delivers balanced white emission with CIE coordinates of (0.310, 0.307), a color rendering index of 70, correlated color temperature of 6651 K and luminous efficiency of 26.76 lm W −1 , demonstrating great potential for solid-state lighting applications. All-inorganic CsPbBr 3 perovskite nanocrystals (NCs) exhibit excellent optoelectronic properties but suffer from severe instability against moisture, oxygen, heat, and polar solvents due to their ionic lattice, surface defects, and labile ligands, leading to rapid ion migration and photoluminescence quenching. In this work, a dual-shell engineering strategy based on a non-hydrolytic sol-gel (NHSG) route was developed to construct CsPbBr 3 @SnO x and CsPbBr 3 @SnO x @ZSM-5 composite nanostructures. An SnO x -rich interfacial layer was formed on the CsPbBr 3 NCs and subsequently coupled with hierarchical ZSM-5 confinement, contributing to surface-defect passivation and stabilization of the interfacial chemical environment while preserving the perovskite crystal structure and emissive centers. At an optimized Sn/Pb molar ratio of 0.5, the photoluminescence quantum yield (PLQY) increased from 64% to 74%, and an optimal reaction time of 10 min yielded the highest emission efficiency (PLQY≈70%). Moreover, the SnO x coating significantly enhanced environmental stability, with CsPbBr 3 @SnO x retaining 55% and 47% of its initial PL intensity after 120 min exposure to water and ethanol, respectively. Subsequently, hierarchical encapsulation within mesoporous ZSM-5 further reinforced structural robustness and optical stability. The resulting CsPbBr 3 @SnO x @ZSM-5 composite achieved an enhanced PLQY of 76% and exhibited negligible emission shift after immersion in water, ethanol, and tetrahydrofuran for 120 min. In addition, the composite demonstrated excellent stability under continuous UV irradiation, thermal treatment, and ambient storage conditions. Finally, a white light-emitting diode (WLED) device fabricated using CsPbBr 3 @SnO x @ZSM-5 delivered stable white emission with Commission Internationale de l'Éclairage (CIE) coordinates of (0.310, 0.307), a color rendering index (CRI) of 70, a correlated color temperature (CCT) of 6651 K, and a luminous efficiency of 26.76 lm W −1 . These results highlight the effectiveness of the dual encapsulation strategy in simultaneously enhancing the photoluminescence performance and environmental stability of perovskite nanocrystals, providing a viable route toward high-performance optoelectronic and solid-state lighting applications. Download: Download high-res image (303KB) Download: Download full-size image
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CHINESE JOURNAL OF CHEMISTRY
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2012
·Vol. 30
·期 7
·1571-1574
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IF 0.755
Jing Cao,Yang Li,Junxiang Feng
Two kinds of novel styryl chemosensory 2-FMNC and 3-FMNC, were designed and synthesized by an apporiate introduction of 9-benzylidene-9 H -fluorene group as fluorophore with the aim at avoiding photoisomerisation. These 9-benzylidene-9 H -fluorene derivatives showed the similar selectivity and sensitivity upon addition of metal ions. The sensitivity of FMNC to alkaline earth metal ions was Ba 2+ >Sr 2+ >Ca 2+ ≈Mg 2+ .
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高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2026
·
IF 4.5
Linquan Li,Zongqiang Liu,Shanshan Zhang,Weijiong Dai,Yan Wang,Jiajun Zheng,Ruifeng Li
A low-cost seed-assisted route was developed to synthesize plate-like ZSM-5 zeolite. • The key factors governing the synthesis were systematically investigated. • The minimum thickness of the b -axis could reach ∼50 nm. • Reducing b -axis thickness of ZSM-5 zeolite improves its catalytic performance in 1-butene cracking. Plate-like ZSM-5 zeolites, featuring a shortened b -axis that effectively alleviates micropore diffusion limitations, display significant advantages in many catalytic reactions. However, current syntheses rely heavily on expensive organic structure-directing agents (OSDAs) and sometimes toxic fluoride reagents, making a low-cost synthesis route highly desirable. To fulfill this goal, we propose a seed-assisted strategy combined with γ-aminobutyric acid as an additive, which effectively reduces the consumption of OSDA. By tuning key parameters, the b -axis thickness can be precisely controlled during synthesis, the minimum thickness could reach ∼50 nm. Plate-like ZSM-5 zeolites with similar physicochemical properties but different b -axis thicknesses were tested in 1-butene catalytic cracking. Reducing the b -axis thickness could effectively enhance the catalytic activity and stability, the sample (P-6%) with the thinnest b -axis thickness exhibiting the best performance. TGA analysis of spent catalysts confirmed the superior coke tolerance of P-6%, and in situ UV-Vis spectroscopy investigation of organic intermediates formed during the reaction further confirmed its excellent activity and stability. Download: Download high-res image (256KB) Download: Download full-size image
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JOURNAL OF CATALYSIS
·
2026
·
IF 6
Wenfeng Zhang,Xiao Jiang,Xian Tang,Shiyu Wu,Jingcong Wei,Kairui Wei,Hao Xu,Kui Wang,Kaili Zhang,Jianchun Jiang
Developing precious-metal-free catalysts for the selective hydrodeoxygenation of biomass-derived 5-hydroxymethylfurfural (HMF) to 2,5-dimethylfuran (DMF) is critical yet challenging. Herein, a series of non-noble metal Co@CN-T catalysts were designed and fabricated, which can efficiently catalyze the selective hydrogenolysis of HMF to DMF under mild reaction conditions of 140 °C, with the selectivity of the target product reaching as high as 99%. The Co-N x coordination active sites serve as Lewis acid sites, which can preferentially activate the C=O bond in HMF. Such selective activation promotes the effective hydrogenolysis of the intermediate 2,5-bis(hydroxymethyl)furan (BHMF) to 5-methylfurfuryl alcohol (MFA), reduces intermediate accumulation, and thus guarantees high selectivity toward DMF. In addition, the Co@CN-T catalysts also exhibited excellent stability, and their catalytic activity remained stable without obvious attenuation after five consecutive cycles of reaction. This study offers theoretical insights into the use of non-noble metal catalysts for the hydrodeoxygenation of renewable biomass to produce chemical feedstocks.
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高影响因子
Analytical Methods
·
2026
·
IF 3
Nan Zhang,Zhi Wang,Wanqi Qin,Yan Zhang,Si-Jia Ge,Zhen Yu,Xuejing Liu,Qin Wei
The early diagnosis and postoperative monitoring of ovarian cancer rely significantly on the sensitive detection of antigen CA12-5. In this work, a photoelectrochemical immunosensor was developed for the detection of CA12-5, utilizing a CdS/SrTiO3 heterojunction as the photoactive matrix and NiCo2O4 as a quencher probe. The Z-type heterojunction promotes the separation of photogenerated electrons and holes, suppresses the recombination of charge carriers, and thereby significantly enhances the initial photocurrent response. Furthermore, the introduced NiCo2O4 quencher generates steric hindrance and competes effectively with the photosensitive material for light absorption, leading to a reduction in the photocurrent signal. This quenching effect greatly enhances the detection sensitivity for CA12-5. The fabricated immunosensor exhibited excellent selectivity and stability under optimal conditions, achieving a wide linear detection range from 5 pg mL−1 to 50 ng mL−1 and a low detection limit of 1.3 pg mL−1.
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PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2026
·
IF 8.2
Tianlong Tan,Hai Liu,Wenlong Cao,Lei Yang,Shujing Ju,Caiyu Chen,Ewald Janssens,Guowei Han,Dachun Lu,Jue Wang,Qinfang Zhang
The electrochemical CO2 reduction reaction (CO2RR) is one of the most promising pathways to achieving carbon neutrality. However, in acidic electrolytes, the CO2RR tends to suffer from competitive hydrogen evolution side reactions. Alkaline electrolytes are typically employed to suppress side reactions and promote the formation of valuable multicarbon (C2+) products (e.g., ethylene(C2H4)). In this study, we fabricated surface-loaded copper cluster catalysts with particle sizes below 5 nm by magnetron sputtering and inert gas condensation in combination with cluster beam deposition. This approach enabled precise control over the catalyst surface structure, allowing for in-depth investigation of the synergistic effects between the catalyst microstructure and its catalytic microenvironment. We demonstrate that the Faradaic efficiency (FE) for CO2-to-C2H4 conversion exceeds 50% across a broad current density range of 50 to 180 mA cm–2 in a flow cell using 1 M KOH electrolyte. Compared with a pristine Cu/PTFE catalyst, the optimized Cu cluster catalyst not only exhibits a significant enhancement in FEC2H4 but also expands the effective current density range. Furthermore, finite element simulations combined with in situ Raman spectroscopy reveal synergistic interactions among interfacial species (e.g., *CO, OH–, and K+). Therefore, this study proposes a general strategy to regulate the dynamic evolution of catalytic interfaces through an initial nanostructure design, thereby opening a promising avenue for the selective conversion of CO2 to ethylene.
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PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 3
·122623
·
IF 7.5
Shan Yue,Xiangdong Ma,Hui Kan,Rui Liu,Jiayi Gao,Mingjing Zhao,Xiaohong Xia
For the electrocatalytic oxidation of 5-hydroxymethylfurfural (HMF), the precise regulation of the catalyst surface-interface structure and reactant adsorption is crucial for its activity. Here, a KOH-soaking assisted immersion–electrodeposition strategy is developed to construct a nickel–cobalt bimetallic hydroxide catalyst on nickel foam (NF), denoted as s-NiCo@NF. Importantly, KOH-soaked NF (s-NF) undergoes surface reconstruction and provides abundant nucleation sites, thereby guiding subsequent electrodeposition to form uniformly distributed crystalline-amorphous phases and a short-range ordered crystalline-amorphous interface. Characterization results reveal that the amorphous regions, via interfacial charge transfer, stabilize the high proportion of Ni³ ⁺ (Ni³⁺/Ni²⁺=1.05) and Co³ ⁺ active sites. Notably, s-NiCo@NF exhibits exceptional HMF oxidation reaction (HMFOR) with the low onset potential of 1.25 V ( vs. RHE) and high current density of 108 mA cm⁻² at 1.5 V( vs. RHE). In-situ Raman test shows that the dynamically formed MOOH (M = Ni/Co) crystalline-amorphous interface achieves the structure self-renewal and drives the adsorption-dehydrogenation oxidation mechanism. Moreover, HMF molecule adsorption forms a protective layer that significantly slows the reduction and deactivation of NiOOH during the reaction, offering new insights into active phase stability. Based on the structural regulation induced by the substrate, this work provides a high-performance nickel-based material for biomass electrocatalytic conversion.
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