CHEMICAL ENGINEERING JOURNAL
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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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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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Energy Technology
·
2021
·Vol. 9
·期 9
·2100396
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IF 3.631
Qinghua Ji,Chin Ping Tan,Abu ElGasim A. Yagoub,Li Chen,Dong Yan,Cunshan Zhou
Herein, a natural deep eutectic solvent (DES) is developed to deconstruct the recalcitrant structure of sugarcane bagasse (SCB) for further 5-hydroxymethylfurfural (5-HMF) production. The properties, structure of the DES, and the influence of pretreatment and reaction conditions on SCB are studied. The findings reveal that carboxylic acid DES pretreatment results in a substantial decrease of hemicelluloses and lignin. At the same time, carboxylic acid DES systems significantly improve the yield of 5-HMF at 110 °C. Under the optimum conditions (choline chloride (ChCl)–lactic acid (8.33 wt% H 2 O), SCB/DES (1:10/wt:wt), temperature 110 °C, and time 4 h), the 5-HMF yield obtained from SCB is 56.68 mol% (1.62 mg mL −1 ). This 5-HMF yield is significantly higher by 25.88, 16.43, and 9.87-folds compared to the 5-HMF yield from the SCB treated with ChCl–urea, ChCl–glycerin, and ChCl–ethylene glycol, respectively, under the same reaction conditions. In addition, component analysis and structural characteristics suggest that the content of lignin in the SCB decreases significantly, and the cellulose and hemicellulose are partially hydrolyzed after being treated with the DES composed of ChCl and carboxylic acids. Overall, this work shows that SCB pretreatment with a carboxylic acid DES is promising for low-cost biorefineries to achieve effective biomass fractionation and conversion.
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RSC Advances
·
2017
·Vol. 7
·期 79
·49883-49889
·
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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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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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
Nature Communications
·
2026
·
IF 15.7
Lai Dingbo,Yu Jia,Ma Zi-Ang,Ye Xiaolin,Wang Chaoxi,Zhang Junqing,Wang Tuo,Zhao Zhi-Jian,Zhang Peng,Gong Jinlong
The electrochemical C–N coupling of biomass-derived 5-hydroxymethylfurfural (HMF) with methylamine offers a promising sustainable route to value-added amines. However, achieving high selectivity remains challenging due to competing side reactions, including C = O hydrogenation and C–C dimerization. This paper describes tailoring the surface structure of Ag catalysts to modulate HMF adsorption and intermediate hydrogenation behavior and thus enhancing C–N coupling selectivity. Ag nanoparticles, predominantly exposing the (111) facet, exhibit higher selectivity compared with Ag nanocubes mainly enclosed by (100) planes. The Ag(111) facet favors the C–N coupling pathway by regulating both adsorption geometry and hydrogenation ability. In-situ Raman spectroscopy and density functional theory (DFT) calculations reveal that an η 1 (C)-aldehyde adsorption configuration, dominant on Ag(111), enhances carbonyl electrophilicity and facilitates C = O polarization, promoting nucleophilic attack by methylamine. In contrast, the η 2 (C,O)–aldehyde configuration, more common on Ag (100), stabilizes the C = O bond, limiting its reactivity. Moreover, Ag(111) shows enhanced imine hydrogenation activity, further improving amine selectivity. This study highlights the significance of facet-dependent adsorption modulation in steering reaction pathways and advancing sustainable electrochemical synthesis.
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PubMed
高影响因子
PETROLEUM CHEMISTRY
·
2025
·
IF 1.1
Jiang Ning,Mao Min,Wang Qingyin,Wang Gongying
MOF-5 is a classic metal-organic framework (MOF) crystal. However, synthesis of high-quality crystals usually requires an expensive N , N ′-diethylformamide (DEF) solvent, and a high molar ratio of a raw material (Zn 2+ : BDC 2– = 3‒5 : 1). More critically, its extreme instability against water vapor has caused researchers to do not use it. In this study, we achieved some important breakthroughs by using inexpensive N , N ′-dimethylformamide (DMF) solvent and meticulously optimizing synthesis parameters combined with a specialized micro-open solvothermal method. With a reduced molar ratio of a raw material (1.47 : 1), we successfully synthesized crystals exhibiting excellent phase structure and morphology, high surface area, out standing water vapor stability, and strong CO 2 adsorption capacity. The results show that the DEF replacement with DMF and reduction of the raw material molar ratio from 3 : 1 to 1.47 : 1 provides an increase of the BET surface area from ~935 to 2388 m 2 /g, and an improvement of the CO 2 adsorption capacity from ~0.8 to 2.5 mmol/g (298 K, 100 kPa). Breakthrough curves reveal that in simulated separation experiments for the flue gas and natural gas containing low CO 2 concentrations (10‒20%), the dynamic separation selectivity for CO 2 /N 2 reaches 22, while that for CO 2 /CH 4 remains stable at 4. Notably, the selectivity remained nearly unaffected by the pressure variation; this phenomenon is promising for enhancing the capture and purification of a low-concentration CO 2 from the flue gas and natural gas. It is important that the improved MOF-5 crystals prepared under optimal synthetic conditions maintained the stable phase structure and morphology even after 14-day exposure to humid air (relative humidity >70%), successfully overcoming the challenge posed by a water vapor.
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JOURNAL OF ETHNOPHARMACOLOGY
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2026
·
IF 5.4
Meiyu Wan,Tiexin Sun,Yuying Diao,Saijin Huang,Yingying Tong,Ying Liu,Weijie Liu,Meijuan Liu,Shu Jiang,Erxin Shang,Jinao Duan
Ethnopharmacological relevance Dachengqi decoction (DCQ), a well-known Traditional Chinese Medicine (TCM) formula, has been widely applied for anti-constipation in clinical practice for thousands of years. Nevertheless, its pharmacological mechanisms remain not fully elucidated. Aim of the study This research employed a comprehensive approach integrating network pharmacology and metabolomics, supplemented with molecular docking techniques and both in vitro and in vivo experimental validation, to systematically elucidate the bioactive constituents, critical targets, and underlying mechanisms of DCQ in alleviating constipation. Materials and methods This investigation utilized a comprehensive pharmacology integration strategy to forecast the principal therapeutic pathways through which DCQ alleviates constipation. The establishment of a loperamide-induced constipation model in rats served to evaluate the interventive effects of orally administered DCQ. In addition, ultra-performance liquid chromatography quadrupole time-of-flight tandem mass spectrometry (UPLC-Q-TOF-MS/MS) was used to detect the changes of metabolites in plasma and urine of rats, and the metabolic related targets were analyzed. Combined with network pharmacology, the potential mechanism of DCQ in ameliorating constipation was revealed and further verified by molecular docking. According to the results of joint analysis, the intervention of DCQ mainly involved the serotonin (5-HT) pathway, including the inflammatory pathways of arachidonic acid and cAMP downstream of 5-HT. Therefore, the mRNA and protein expression levels of key factors associated with the 5-HT pathway, including phospholipaseA2 (PLA2), cAMP/PKA/AQPs, and PANoptosis, were detected. Furthermore, an inflammatory model of Caco-2 cells was induced to investigate the effect of DCQ on the 5-HT pathway. The expression of related targets (PLA2, PKA and ZBP1) was detected by reverse transcription quantitative PCR and immunofluorescence to further verify the molecular mechanism of DCQ. Results DCQ demonstrated efficacy in ameliorating constipation symptoms induced by loperamide in rats and reducing inflammatory responses in Caco-2 cells, while normalizing aberrant plasma and urinary metabolic profiles and regulating arachidonic acid metabolism in constipated rats. Integrated metabolomics and network pharmacology analyses revealed that DCQ mainly alleviated constipation via the 5-HT pathway, markedly suppressing the PLA2-mediated inflammation and PANoptosis while concurrently activating the cAMP-PKA-AQPs cascade to notably increase the expression of aquaporins (AQPs). Conclusions DCQ could restore the homeostasis of metabolic profiles in plasma and urine in model rats, activate the 5-HT pathway to alleviate inflammation, and may be involved in the regulation of PANoptosis-related mechanisms in intestinal epithelial cells, providing a new perspective for constipation treatment.
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 13.2
Akkammagari Putta Rangappa,Wei Xiong,Wenhua Xue,Xinxin Lu,Yiqi Geng,Yuchao Shao,Guohan Sun,Jun Zhao
Activation of molecular O 2 on catalytic surfaces to form reactive oxygen species (ROS) is a pivotal step in catalytic reactions. In this study, we synthesized a bimetallic Zn 3 In 2 S₆ (ZIS) catalyst enriched with Pd S interfaces via a straightforward cation exchange process between Pd 2+ and Zn 2+ . These interfaces function as electron reservoirs, and Pd incorporation significantly enhances photocatalytic performance by reorganizing the electronic structure of the ZIS matrix, thereby improving charge carrier dynamics and reaction kinetics. Additionally, Pd modification optimizes O 2 adsorption strength, preventing excessive population of the π* antibonding orbital that can lead to O O bond cleavage and reduce ROS generation. Theoretical calculations reveal that monodentate adsorption of O 2 on Pd-ZIS surfaces promotes efficient photo induced electron transfer across all excited states, enabling effective ROS activation. The combination of experimental findings and theoretical analysis identified the mechanisms underlying the improved selectivity of Pd-modified ZIS catalysts. As a result, the optimized Pd-ZIS-5 photocatalyst demonstrates a high photo-oxidation performance for HMF oxidation, achieving 92.4 % conversion, 86.3 % yield, and 93.4 % selectivity–representing a 1.7-fold improvement over prismatic ZIS. Overall, this work demonstrates how Pd doping and tailored O 2 adsorption strength enhance photocatalytic processes, offering valuable insights for advanced biomass conversion and sustainable chemical production.
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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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