POLYHEDRON
·
2021
·
IF 3.052
Aihong Li,Dongyang Li,Jianwei Mao,Zhimeng Ge,Jianping Guo,Bo Liu
Through a facile solvothermal method, the novel composites of cobalt(II) diphenylphosphinate/TiO 2 have been synthesized and used for photocatalytic hydrogen production in ethanol solution. The chemical composition and surface morphology were analyzed by XPS, XRD, ICP-OES, EA, IR and SEM. The composite CoTi10 showed high photocatalytic activity in H 2 evolution that the quantity is ca. 1155.86 μmol/g for 3 h in ethanol solution under the illumination of UV–visible light source, which is 12 times higher than the commercial P25. The composites also exhibited unique selectivity for converting ethanol to 1,1-diethoxyethane in the photocatalytic process. Moreover, their good stabilities were revealed in the recycling test. It is thus clear that the composite can effectively inhibit the recombination of electron-hole pairs in photocatalytic reactions and lead to the enhanced hydrogen production rate.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Kaidi Guo,Mei Hong,Jianzhong Jiang
C₁₄N-TCA, as a kind of carboxylate surfactant, could response to CO 2 below pH 8.6. • Unique bond cleavage mechanism enables faster and more efficient CO₂-induced demulsification. • Benefited from hydrogen bonds, C₁₄N-TCA possesses high solubility and surface activity Alkaline environments are widely encountered in fields such as metal cleaning, textiles and papermaking. However, it remains a challenge to develop temporarily stable emulsions that can not only maintain satisfactory stability in alkaline media but also achieve rapid demulsification under the similar alkaline conditions. In this paper, a cleavable carboxylate surfactant (sodium N-tetradecyl-1-carboxylate-1-hexylene-2-carboxamide, abbreviated as C 14 N-TCA) was synthesized. C 14 N-TCA stabilized O/W emulsions at only 0.03 mM and exhibited excellent foaming properties (initial volume 58 mL, half-life 40 h at 5 mM in 10 mL samples), owing to its intramolecular amide groups that formed intermolecular hydrogen bonds. Unlike other carboxylate surfactants that required a pH below 5 to convert from carboxylate to carboxylic acid, C 14 N-TCA underwent structural dissociation at approximately pH 8.6 upon brief CO₂ bubbling, thus enabling rapid demulsification. The CO₂ response rate of C 14 N-TCA was 5-fold and 30-fold faster than that of sodium palmitate (SP) and sodium 3,3′-(dodecylazanediyl) dipropionate (Di-NDBIa), respectively. C 14 N-TCA was applicable to the cleaning of oil-contaminated alkaline soil, as it not only exhibited superior washing efficiency to the conventional surfactant sodium dodecyl sulfate (SDS), but also allowed demulsification and surfactant recovery through CO₂ trigger post-cleaning. This study provided insights into the structural design of CO₂-responsive carboxylate surfactants and held potential applications in fields requiring the temporary stabilization of emulsions or foams under alkaline conditions. Download: Download high-res image (242KB) Download: Download full-size image
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高影响因子
ANALYST
·
2015
·Vol. 140
·期 13
·4626-4635
·
IF 4.107
Zian Lin,Ruifang Yu,Wenli Hu,Jiangnan Zheng,Ping Tong,Hongzhi Zhao,Zongwei Cai
Combining free radical polymerization with click chemistry via a copper-mediated azide/alkyne cycloaddition (CuAAC) reaction in a “one-pot” process, a facile approach was developed for the preparation of a poly(3′-azido-3′-deoxythymidine-co-propargyl methacrylate-co-pentaerythritol triacrylate) (AZT-co-PMA-co-PETA) monolithic column. The resulting poly(AZT-co-PMA-co-PETA) monolith showed a relatively homogeneous monolithic structure, good permeability and mechanical stability. Different ratios of monomers and porogens were used for optimizing the properties of a monolithic column. A series of alkylbenzenes, amides, anilines, and benzoic acids were used to evaluate the chromatographic properties of the polymer monolith in terms of hydrophobic, hydrophilic and cation-exchange interactions, and the results showed that the poly(AZT-co-PMA-co-PETA) monolith exhibited more flexible adjustment in chromatographic selectivity than that of the parent poly(PMA-co-PETA) and AZT-modified poly(PMA-co-PETA) monoliths. Column efficiencies for toluene, DMF, and formamide with 35 000–48 000 theoretical plates per m could be obtained at a linear velocity of 0.17 mm s−1. The run-to-run, column-to-column, and batch-to-batch repeatabilities of the retention factors were less than 4.2%. In addition, the proposed monolith was also applied to efficient separation of sulfonamides, nucleobases and nucleosides, anesthetics and proteins for demonstrating its potential.
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PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2016
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IF 7.145
Xubo Zhao,Mingzhu Qi,Shuo Liang,Kun Tian,Tingting Zhou,Xu Jia,Jiagen Li,Peng Liu
Novel photo- and pH dual-sensitive amphiphilic copolymers containing photolabile o-nitrobenzyl (NB) groups were designed via combination of ATRP, hydrolyzation, and simple esterification reaction and self-assembled into stimuli-regulated amphiphilic micelles in aqueous solution. On the basis of the optimization of the morphology and particle size of the micelles via modulating the number of the photocleavable o-nitrobenzyl acrylate (NBA) units, the unique ones assembled from PEG43-b-P(AA76-co-NBA35-co-tBA9) with an average hydrodynamic diameter (Dh) of 163 nm was selected as a potential drug delivery system (DDS) for UV-triggered delivery of doxorubicin (DOX). The micelles possessed a favorable drug-loading capacity (DLC) of 27.5%, with the hydrodynamic diameter of 213 nm after DOX-loading. Most importantly, the DOX-loaded PEG43-b-P(AA76-co-NBA35-co-tBA9) micelles exhibited a cumulative DOX release ratio of only 3.69% in the simulated physiological medium within 6 days without UV-irradiation, indicating their potential as leakage-free DDS. As in the acidic media mimicking the tumor microenvironment, a high cumulative DOX release ratio of 74.70% was achieved within 6 days after UV-irradiation for 20 min, showing a sustained release behavior. Under UV-irradiation, the photolabile o-nitrobenzyl moieties were cleaved off, the amphiphilic copolymer transformed into a water-soluble polymer, favoring the metabolism of drug carriers, and the micelles were demicellized to accelerate the drug release in a triggered or on-demand manner.
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DOI
PubMed
高影响因子
FUEL
·
2025
·
IF 7.5
Guoyang Zhao,Yafei Guo,Pu Huang,Zhouzhou Zhang,Chuanwen Zhao
Developing highly efficient and robust catalysts for low-temperature CO oxidation is essential for CO abatement in sintering flue gas. CuO-Co 3 O 4 catalysts incorporated with transition metal oxides (TMOs) of CeO 2 , ZrO 2 , NiO or Fe 2 O 3 were synthesized using the sol–gel method. The crystalline structure, morphology, electronic structure, surface active sites and redox properties of the composite catalysts were characterized by X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), energy-dispersive X-ray spectroscopy (EDX), X-ray photoelectron spectroscopy (XPS), CO temperature-programmed desorption (CO-TPD), H 2 temperature-programmed reduction (H 2 -TPR), and O 2 temperature-programmed oxidation (O 2 -TPO). The influence of incorporating TMO on CO oxidation performance of the composite catalysts was thoroughly investigated. Results indicated that incorporating CeO 2 and ZrO 2 enhanced the CO oxidation activity of CuO-Co 3 O 4 significantly, achieving notably low T 100 temperatures of 134 °C and 150°C. The desired CuO-Co 3 O 4 -CeO 2 and CuO-Co 3 O 4 -ZrO 2 composite catalysts also showed outstanding CO oxidation kinetics performance with low activation energies of 25.36 and 26.41 kJ/mol, and remarkable time-on-stream stability, sustaining a near 100 % CO conversion rate for up to 25 h. The superior CO oxidation performance was associated with the smaller crystallite sizes, uniformly dispersed active sites, abundant oxygen vacancies, and enhanced redox properties, all of which stemmed from the strengthened interfacial interactions among the metal oxides upon CeO 2 and ZrO 2 incorporation. These findings offer valuable insights into the structure–property-activity relationships of the CuO-Co 3 O 4 -TMO composite catalysts, positioning the CuO-Co 3 O 4 -CeO 2 and CuO-Co 3 O 4 -ZrO 2 samples as promising candidates for low-temperature CO oxidation in sintering flue gas treatment.
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高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Tian Tang,Kunlu Chen,Xing Wang,Yanggu Liu,Ziwen Zheng,Xiaoqiang Shen,Liya Li,Xueyan Zheng,Shuai Xiao,Yanrong Chen,Xuesen Du
Under technologically relevant oxygen-rich conditions, the reaction mechanism for CO oxidation over platinum group metals (PGMs) is often complicated by oxide formation. Ru, as a special PGM exhibiting "pressure gap" phenomenon, its optimal active state has been proved to be an ultrathin Ru oxide, rather than pure metal like other PGMs. Therefore, it is plausible to suspect that the sharp rise of CO oxidation rate within narrow temperature range for Ru-based catalysts is not solely controlled by the O 2 activation rate. In this study, we investigated this temperature-dependent sharp rise in the CO oxidation rate through experimental and theoretical calculations. In the rate mutation region, diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) detected a rapid increase in CO 2 production as the adsorbed CO species were annihilated, accompanied by a shift in the reaction orders of CO and O 2 from -0.29 and +0.59 (∼205 °C) to +0.94 and +0.15 (∼215 °C), respectively. The thermodynamic phase diagram indicates that the RuO 2 (110) surface consistently accommodates O* species, but fails to form a stable CO* phase when the temperature exceeds 580 K. Density functional theory (DFT) calculations suggest that initiating the Mars-van Krevelen ( M −vK) mechanism at low temperatures requires overcoming a relatively high activation energy (Ea 1 = 1.28 eV), hence CO prefers the Langmuir-Hinshelwood ( L − H ) mechanism on the Ru/TiO 2 surface. However, as the temperature rises, the M −vK mechanism, once initiated, the activation and reaction of O 2 assisted by oxygen vacancies are thermodynamically(△ H = -2.03 eV) and kinetically (Ea 2 = 0.37 eV) more favorable, respectively. This shift from the L − H to the M −vK mechanism significantly enhances the CO oxidation rate on RuO 2 /TiO 2 catalysts.
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高影响因子
International Journal of Polymeric Materials and Polymeric Biomaterials
·
2021
·
IF 2.604
Yan Zhang,Hai-Chao Zhao,Li-Jing Zhu
Mussel-inspired bionics technology has attracted extensive attention for the surface modification of porous materials. The adhesion effect of the mussel mucin comes is mainly from hydroxylation. Hence, polysulfone membrane was modified by co-deposition of catechol with hydroxyl and L-lysine with biocompatibility. Flux of the membrane exceeds 120 L m−2 h−1, the ultra-high rejection rate to bovine serum albumin and lysozyme. Moreover, the modified membranes exhibited enhanced antifouling ability, antibacterial property and adhesion resistance to E. coli with the synergy between catechol and L-lysine. The fabricated membranes can further lay the foundation for the industrial production of deposited membranes.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Linkun Liang,Xueping Zheng,Yifang Yao,Shenglin Liu,Jianzhong Wang,Wenshuai Liu,Chunxu Hu,Yuxuan He
In the context of hydrogen energy development, hydrogen production technology based on the hydrolysis of sodium borohydride (NaBH 4 ) has attracted considerable attention owing to its mild reaction conditions and the high-purity hydrogen generation. Nevertheless, the intrinsically sluggish hydrolysis kinetics of NaBH 4 require the development of non-noble metal catalysts that simultaneously achieve high catalytic activity and excellent durability. In this work, a molybdenum-doped cobalt hydroxide (MoO 2 -Co(OH) 2 ) catalyst was fabricated via a homogeneous urea precipitation approach, and its catalytic performance for H 2 generation from NaBH 4 hydrolysis was systematically evaluated. Concurrently, SEM, TEM, and XPS characterizations collectively elucidated the reaction pathway and electronic modulation mechanism involving Mo-doping-induced Co 2+ oxidation and oxygen vacancy generation. Additionally, this study demonstrates that the composite material possesses favorable surface hydrophilicity and exceptional synergistic catalytic activity. Through systematic modulation of the Mo/Co molar ratio, the MoO 2 -Co(OH) 2 catalyst achieved an exceptional hydrogen generation rate (HGR) of 9831.46 mL·min −1 ·g −1 at ambient temperature, concomitant with a markedly reduced activation energy (38.81 kJ·mol −1 ) relative to pristine Co(OH) 2 (68.97 kJ·mol −1 ). Furthermore, the catalytic performance of this system is comparable to, or even superior to, that of state-of-the-art Co-based catalysts. The superior catalytic performance was ascribed to the synergistic contributions of abundant defect sites afforded by the amorphous architecture, the intrinsically enhanced activity stemming from the electronic structure modulation, and the enhanced stability endowed by the compact microstructure.
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高影响因子
JOURNAL OF POWER SOURCES
·
2026
·
IF 8.4
Yongkang Luan,Linhao Fan,Chasen Tongsh,Siyuan Wu,Kui Jiao
Water flooding within catalyst layers (CLs) results in increased mass transfer loss and a significant performance degradation in proton exchange membrane fuel cells (PEMFCs). In this work, we leveraged the unique advantage of electrospinning to separately fabricate catalyst fibers and hydrophobic polyvinylidene fluoride (PVDF) fibers, thereby enhancing the consistency and controllability of CL fabrication. Using this approach, we developed a gradient hydrophobicity-modified nanofiber (GHM-NF) CL, in which the region close to the PEM exhibits relatively hydrophilic to maintain effective proton conduction, while the region adjacent to the gas diffusion layer is appropriately hydrophobic to enable efficient water expulsion. The power density of GHM-NF CL at 2.4 A cm −2 is 9.1% higher than that of the NF CL, accompanied by a 22.7% reduction in concentration resistance. The GHM-NF CL also demonstrates excellent drainage under higher Pt loading, where enhanced current densities and greater water production occur. Its power density at 3.5 A cm −2 reaches 1.239 W cm −2 , which is 8.9% higher than that of the NF CL. Meanwhile, at 3 A cm −2 , the concentration resistance of the GHM-NF CL is only 52.3 mΩ cm 2 , a 16.7% decrease compared to the NF CL (62.8 mΩ cm 2 ). Overall, this developed GHM-NF CL mitigates flooding and suppresses the sharp rise in mass transfer losses under high current densities and substantial water production, offering a promising new strategy for designing hydrophobic gradient CLs with high drainage capacity to meet the ever-increasing performance demands of commercial PEMFCs.
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高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 5
·124383
·
IF 7.5
Zhengyan Liu,Xiaoli Su,Jie Li,Nan Jiang,Muhammad Imran,Yunxia Chen
A plasma-catalytic system coupled with floating electrode discharge with metal foam-supported catalysts was developed for efficient toluene degradation. The influences of different transition metal oxides (Co, Mn, Ce) loaded onto Fe foam (FF) substrates on the crystal structure, surface morphology and catalytic performance were systematically investigated. Catalysts were symmetrically placed on both sides of the floating electrode. Among the investigated metal oxides, Co was found to form a uniformly distributed CoFe 2 O 4 surface layer on the FF substrate, while Mn and Ce were heterogeneously dispersed as MnO 2 and CeO 2 , respectively. All metal-loaded catalysts enhanced the discharge power of the reactor, attributed to surface charge accumulation on metal oxides. The Co/FF catalyst exhibited the highest toluene degradation efficiency, CO 2 selectivity and O 3 decomposition capability. This plasma-Co/FF system significantly reduced the O 3 concentration from 112 ppm (plasma alone) to 26.2 ppm at a specific input energy (SIE) of 232 J/L. Density functional theory (DFT) calculations suggest that Co sites in CoFe 2 O 4 possess a lower O 3 adsorption energy and higher charge density potential to a higher oxygen vacancy formation tendency, promoting O 3 activation. This study provides an understanding of the mechanistic basis for the rational design of efficient plasma-catalytic systems for toluene removal.
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高影响因子
Environmental Chemistry and Ecotoxicology
·
2026
·
IF 12.3
Yingying Lu,Le Li,Xinyi Wu,Bo Lv,Qu Cai,Zhi Wang,Juan Wang
The widespread presence of heavy metals, particularly cadmium (Cd), in agroecosystems has long raised environmental concerns, while emerging contaminants such as microplastics further complicate risk assessment and management. In this study, we investigated the combined effects of Cd and polystyrene nanoplastics (PS-NPs) on the physiological and immune responses of the wolf spider Pardosa pseudoannulata . Our results revealed progressive accumulation of PS-NPs in spider tissues, while Cd concentrations increased over time and varied with PS-NPs levels. Histological analysis showed that Cd exposure alone caused elongation and disorganization of midgut epithelial cells with leakage of intracellular contents, whereas co-exposure induced cell swelling, blurred boundaries, and intracellular particle retention. In addition, an increase in wall thickness of the gut was observed in all exposed spiders. Consistently, cellular damage was more pronounced under combined exposure, as evidenced by significantly increased hemolymph apoptosis, which exhibited a non-monotonic dose-response pattern. Transcriptomic analysis revealed extensive gene expression changes, especially in the high-concentration group. A set of shared differentially expressed genes was primarily associated with energy metabolism, immune response, and protein synthesis pathways, with oxidative phosphorylation and ribosome functions identified as key modules. Moreover, immune-related genes in “Apoptosis” and “Necroptosis” pathways displayed consistent expression patterns with apoptosis rates. Overall, these results demonstrate that NPs modulate Cd accumulation and toxicity in a non-monotonic dose-response manner, leading to distinct physiological and transcriptional responses in P. pseudoannulata . This study provides new insights into the ecological risks of combined pollutants and highlights the importance of considering their interactions in agroecosystem management.
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高影响因子
JOURNAL OF POWER SOURCES
·
2026
·
IF 8.4
Shah Noor,Xiaoshuai Yu,Chunlin Li,Lei Sun,Zibo Zhao,Yan Liu,Chun Cheng Yang,Guoyong Wang
The rational design of high-performance electrocatalysts is essential for promoting the industrialization of electrocatalytic water-splitting technology. Herein, nitrogen-defects (Nd)-enriched g-C 3 N 4 (CN)-supported cobalt single-atom catalysts (Co-Nd/CN) are fabricated as high-efficiency bifunctional electrocatalysts for water splitting. Abundant Nd improves substrate conductivity and modulates the electronic structure of Co-N x active sites simultaneously. Benefiting from abundant coordination sites, lower charge transfer dynamics, and surface reactions, the optimized Co-Nd/CN exhibits the lowest overpotentials of 172 and 310 mV vs. RHE for HER and OER, respectively, at 10 mA cm −2 . Additionally, Co-Nd/CN delivers a full-cell voltage of 1.53 V at 10 mA cm −2 for overall water splitting with a Faradaic efficiency of 87.5%. Extended durability measurements demonstrate robust catalytic stability for Co-Nd/CN over 100 h of continuous operation. This work puts forward a novel approach based on elemental doping and defect engineering for the design of effective and enduring catalysts for water splitting.
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高影响因子
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