MOLECULES
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2024
·Vol. 29
·期 7
·1554
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IF 4.2
Haorui Gong,Sai An,Weilong Qin,Yongbo Kuang,Deyu Liu
In order to expand the application of bismuth vanadate (BiVO4) to the field of photoelectrochemistry, researchers have explored the potential of BiVO4in catalyzing or degrading organic substances, potentially presenting a green and eco-friendly solution. A study was conducted to investigate the impact of electrolytes on the photocatalysis of benzyl alcohol by BiVO4. The research discovered that, in an acetonitrile electrolyte (pH 9) with sodium bicarbonate, BiVO4catalyzed benzyl alcohol by introducing saturated V5+. This innovation addressed the issue of benzyl alcohol being susceptible to catalysis in an alkaline setting, as V5+was prone to dissolution in pH 9 on BiVO4. The concern of the photocorrosion of BiVO4was mitigated through two approaches. Firstly, the incorporation of a non-aqueous medium inhibited the formation of active material intermediates, reducing the susceptibility of the electrode surface to photocorrosion. Secondly, the presence of saturated V5+further deterred the leaching of V5+. Concurrently, the production of carbonate radicals by bicarbonate played a vital role in catalyzing benzyl alcohol. The results show that, in this system, BiVO4has the potential to oxidize benzyl alcohol by photocatalysis.
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Surfaces and Interfaces
·
2024
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IF 5.7
Hao Zhang,Zhengyuan Tao,Ziqi Yu,Tiantian Zhu,Hanlin Rao,Badusha Mohamad Ali,Jianli Wang
Pickering interfacial catalysts (PICs) have emerged as a promising solution for simultaneously enhancing and catalyzing liquid-liquid biphasic reactions. In this study, we successfully synthesized dumbbell-shaped Janus structured polymeric nanoparticles with one side anchored imidazolium-TEMPO (im-C 4 -TEMPO@JPP) as Pickering interfacial catalyst for the oxidation of alcohols using the Anelli-Montanari reaction system. In the Pickering emulsion system, the im-C 4 -TEMPO@JPPs particles are assembled at the W/O interface due to the hydrophilicity of imidazolium-TEMPO anchored lobe which enables excellent amphiphilic character of the polymeric Janus dumbbell. Moreover, the im-C 4 -TEMPO@JPPs particles reduce the interfacial tension from 27.82 to 18.43 mN/m. This excellent interfacial adsorption capacity of im-C 4 -TEMPO@JPPs strongly stabilizes the water/dichloromethane Pickering emulsion over two months (emulsion volume fraction >90 %), thus providing an efficient reaction platform for liquid-liquid biphasic reactions. As a result, the constructed Pickering emulsion system efficiently catalyzes the oxidation of cinnamyl alcohol to cinnamaldehyde under static conditions. After 1 hour of reaction, the conversion of cinnamyl alcohol achieved 97.1 % with a selectivity of 99 %, nearly the same level relative to stirring intensified biphasic reaction. Hence, this novel PIC effectively improves the efficiency and sustainability of liquid-liquid biphasic catalytic reactions .
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Food Bioscience
·
2025
·
IF 5.9
Ruirui Li,Dongyue Yang,Zhiyu Li,Xiaohong Tang,Ke Zhong,Yan Ding,Xiaomei Han,Xueqiang Guan,Yuxia Sun
Grapes grown in the Yantai wine region typically exhibit lower phenolic content and sugar levels, resulting in wines with relatively lower sensory quality. This study aims to assess the impact of stem-contact fermentation on the quality of wines from this region. Cabernet Sauvignon and Merlot grapes were selected winemaking, using three approaches: 100% destemming, and stem-contact fermentation with 10% and 20% grape stems, respectively. After alcoholic fermentation, the wines were analyzed for oenological parameters, phenolic compounds, color parameters, volatile compounds, and sensory evaluation. The results showed that stems did not negatively impact the oenological parameters. In Cabernet Sauvignon wines, stems resulted in a significant increase in total phenolics, anthocyanins, and tannins. In Merlot wines, stems caused a significant increase in total phenolics and a notable reduction in total anthocyanins. Stems primarily affected the anthocyanin content in both Cabernet Sauvignon and Merlot wines, with minimal effects on the proportions of individual anthocyanins. PLS-DA analysis further revealed that stems significantly affected the levels of total tannins, (−)-epigallocatechin, and total phenolic compounds in Cabernet Sauvignon wines, as well as the levels of (−)-epigallocatechin and total phenolics in Merlot wines. The presence of grape stems also significantly influenced the volatile compounds in the wine. When 20% of grapes retained their stems, there was a trend toward higher volatile content, resulting a more complex aroma profile. Overall, retaining some stems during fermentation is an effective strategy to enhance the quality of wines from the Yantai wine region.
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LANGMUIR
·
2024
·
IF 3.7
Jing Wu,Shuqing Xiang,Ming Zhang,Ninglin Zhou,Mingqian Wang,Li Li,Jian Shen
Wounds caused by bacterial infections have become a major challenge in the medical field; however, the overuse of antibiotics has led to increased resistance and bioaccumulation. Therefore, it is urgent to develop an antibacterial agent with excellent antibacterial properties and biosafety. Here, we designed an antibacterial platform that combines photothermal and chemical kinetics therapies. Platinum–cobalt (PtCo) bimetallic nanoparticles (NPs) were first prepared, and then PtCo@MnO2 nanoflowers were obtained by adding MES buffer solution and KMnO4 to the PtCo bimetallic nanoparticle suspension using ultrasound. When light strikes metal NPs, they can strongly absorb the photon energy, resulting in photothermal properties. In addition, Pt and Co were used as the oxidase mimics, and MnO2 was used as the catalase mimic. In summary, the photothermal capacity of PtCo@MnO2 nanoflowers with rough surfaces can effectively disrupt the permeability of the bacterial cell membranes. Further, by catalyzing H2O2, PtCo@MnO2 nanoflowers can generate large amounts of hydroxyl free radicals, which can damage bacterial cell membranes, proteins, and DNA. In addition, MnO2 can effectively alleviate the hypoxic environment of the bacterially infected areas and activate deep bacteria, thus achieving the goal of complete sterilization. The in vitro and in vivo results showed that PtCo@MnO2 displayed excellent antibacterial properties and good biocompatibility.
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Journal of CO2 Utilization
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2024
·
IF 7.2
Yiming Wang,Wensheng Wei,Yuxin Wang,Guangwen Xu,Jinggang Zhao,Lei Shi
In this study, a series of hydroxy-functionalized quaternary ammonium salt catalysts, i.e., NEt 3 (HE)Br, NEt 2 (HE) 2 Br, NEt 1 (HE) 3 Br, and N(HE) 4 Br, were successfully prepared by quantitatively grafting hydrogen-bond donors (HBDs) as electrophilic sites on quaternary ammonium salts and then used to catalyze the cycloaddition of propylene oxide (PO) and carbon dioxide (CO 2 ). The aim was to reveal the effects of different amounts of hydroxy-functionalized quaternary ammonium salts on their catalytic activities. The synergistic catalytic effect of NEt 3 (HE)Br and a biomass-based catalytic system (NEt 3 (HE)Br/Bio) on the cycloaddition reaction was systematically studied, and the influence mechanism of hydroxy-rich biomass on the cycloaddition reaction was elucidated. The promoting effects of the hydroxyl-group content, position and connection structure in different alcohol additives on the CO 2 cycloaddition reaction were further investigated and the results demonstrated that when the additive molecule contains an appropriate number of ortho-hydroxyl groups and these hydroxyl groups are connected to groups with strong electron-withdrawing ability and small steric hindrance, the cycloaddition efficiency between PO and CO₂ can be significantly enhanced. The reason is that these hydroxyl groups not only provide more hydrogen bonds, enhancing the intermolecular interactions, but also help to stabilize the transition state of the reaction. Notably, when 0.48 g of NEt 3 (HE)Br was mixed with 0.48 g of cellulose as HBDs to catalyze the cycloaddition reaction of CO 2 and PO, PO conversion reached 99.34 % within 2 h, exceeding that obtained with the catalytic reaction system without HBDs. In addition, the NEt 3 (HE)Br/cellulose catalytic system was demonstrated to be universal for catalyzing the cycloaddition reaction of different epoxides and CO 2 . This article provides theoretical guidance and new inspirations for the efficient utilization of hydroxy-containing biomass materials in CO 2 conversion.
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ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Xiaoyu Cao,Xiaomin Qiu,Fan Zhang,Meng Xiao,Tingting Huang,Quanhong Zhu,Zhijie Shang,Hongbing Song
The development of affordable, intelligent dual-separation technology is crucial for the treatment of oil–water mixtures. Pyridinium-based poly(ionic liquid)s (PILs), designed using molecular theory, exhibit unique switching wettability properties, making them ideal for use in both aqueous and oily environments. By prewetting the material’s surface with water or oil, the targeted separation of these components becomes feasible. PILs are synthesized through the cross-linking of [Pyr]Cl with various cross-linkers and auxiliary agents. Studies on the wetting mechanism of these materials have identified bursting pressure and surface structure as key factors influencing their wetting properties. They exhibit hydrophilic and lipophilic properties in air, hydrophobic properties under oil, and oleophobic properties under water, achieving a 99% separation efficiency. A reusability study demonstrated maintenance of 90% efficiency after 10 cycles, highlighting their sustained high performance. This research presents promising avenues for the application of PIL-based materials in oil–water separation, environmental remediation, and industrial processing.
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Molecular Catalysis
·
2024
·
IF 3.9
Zhijiao Huang,Yong Liu,Lungang Chen,Xinghua Zhang,Jianguo Liu,Chenguang Wang,Qi Zhang,Longlong Ma
2,5-dimethylfuran (DMF), a promising biomass-derived fuel, is synthesized via the hydrodeoxygenation of 5-hydroxymethylfurfural (HMF). This study focuses on the inherent activity of a 5Pt5Fe/C catalyst for HMF hydrodeoxygenation to DMF. The catalyst exhibited exceptional performance, achieving a remarkable DMF yield of 99.6 %. It displayed specific selectivity for C = O bond hydrogenation and C O bond cleavage in diverse substrates, producing high yield of 2-methylfuran from furfural and furfury alcohol, and high yield of toluene from benzaldehyde, benzyl alcohol. In-depth characterizations unveiled valuable insights into the 5Pt5Fe/C catalyst's properties, emphasizing a harmonious balance between metal and acid sites due to the interactive synergy between Pt and Fe species, enhancing hydrodeoxygenation activity. Additionally, the catalyst demonstrated satisfactory stability, maintaining a commendable DMF yield over five reaction cycles despite observed changes.
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Nature Communications
·
2025
·Vol. 16
·期 1
·1-14
·
IF 15.7
Li Suiqin,Wang Shibin,Wang Yuhang,He Jiahui,Li Kai,Gerken James B.,Stahl Shannon S.,Zhong Xing,Wang Jianguo
Electrochemical alcohol oxidation (EAO) represents an effective method for the production of high-value carbonyl products. However, its industrial viability is hindered by suboptimal efficiency stemming from low reaction rates. Here, we present a synergistic electrocatalysis approach that integrates an active electrode and aminoxyl radical to enhance the performance of EAO. The optimal aminoxyl radical (4-acetamido-2,2,6,6-tetramethylpiperidine 1-oxyl) and Ni 0.67 V 0.33 -layered double hydroxide (LDH) are screen as cooperative electrocatalysts by integrating theoretical predictions and experiments. The Ni 0.67 V 0.33 -LDH facilitates the adsorption and activation of N -(1-hydroxy-2,2,6,6-tetramethylpiperidin-4-yl)acetamide (ACTH) via interactions with ketonic oxygen, thereby improving selectivity and yield at high current densities. The electrolysis process is scaled up to produce 200 g of the steroid carbonyl product 8b (19-Aldoandrostenedione), achieving a yield of 91% and a productivity of 243 g h -1 . These results represent a promising method for accelerating electron transfer to enhance alcohol oxidation, highlighting its potential for practical electrosynthesis applications.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Jinbo Hu,Wenbo Wang,Xinyan Liu,Yeqi Du,Hao Zhang,Ranlong Duan,Xinchao Bian,Yanlong Liu,Xuesi Chen
The lower melt strength of poly(lactide) (PLA) limits its broader applications. Here, a strategy combining copolymerization with multi-arm branching was propose to enhance the melt strength of PLA. Initially, stereoisomeric cyclic ester monomers (CEM) synthesized via zeolite catalysis were copolymerized into PLA chains. Subsequently, rheological testing revealed that the zero-shear viscosity ( η 0 ) of linear PLA increased by 467 % with only 1 mol% of CEM units. Our study further systematically explored the relationship between the side group structure and chirality of the comonomers and the rheological properties of the copolymers. CEMs with long-chain branched structures and opposite chirality had the best enhancement effect. In order to further enhance the melt strength, we successfully achieved alterations in polymer topology by employing trimethylolpropane as an initiator, corresponding three-arm copolymers achieve up to a 67-fold increase in η 0 (1.0 kPa∙s to 68.1 kPa∙s). Tensile tests indicated that the mechanical properties of the copolymers were comparable to those of PLA, with a tensile strength of approximately 65 MPa. Additionally, due to the high melt strength, we successfully produced closed-cell PLA-based foam materials with uniform pore sizes. In summary, this study furnishes a feasible method for designing polymer materials possessing the desired melt strength.
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ACS Sensors
·
2025
·
IF 9.1
Renjun Si,Renminxi Ou,Jinbo Yang,Shaofeng Chen,Hongze Jiang,Xin Guo,Shunping Zhang
Drunk driving is a major threat to global traffic safety, accounting for 50% to 60% of traffic accidents. To address the bottleneck problem of insufficient selectivity of metal oxide gas sensors in drunk driving detection, this paper proposes an optimization strategy based on the principle of selective extraction and programmed temperature desorption technology. This strategy uses temperature modulation to control the adsorption processes of target gases, solving the cross-interference problem between ethanol and other volatile organic compounds in exhaled breath. A temperature-modulated on-chip programmed temperature desorption ethanol sensor was developed using ZSM-5 and Pt@SnO2 as the adsorption and desorption material and gas-sensitive material for ethanol, respectively. By optimizing the temperature modulation parameters (heating and cooling rates, adsorption time), the height of the ethanol desorption peak was precisely quantified. The maximum deviation of the desorption peak height of interfering gases and their mixtures with ethanol (40 ppm) in human exhaled breath from the detection instrument was only equivalent to 5.20 ppm ethanol. The highly selective ethanol sensor was integrated into the USB detection terminal to form a portable U-disk drunk driving detector, which has significantly better sensitivity and anti-interference ability than senior commercial products. The high selectivity is essentially due to the rapid extraction of ethanol from the environment by ZSM-5 in a short time.
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QUIMICA NOVA
·
2025
·
IF 0.7
Meng Shuangyan,Liu Bin,Xie Minglin,Yun Chaoxin,Qiang Jin,He Kaizhou,Yang Zhiwang,Wang Xiangqian
A composite photocatalyst, xTCN (xOTiO2/g-C3N4, where x represents the added quantity of graphite carbon nitride (g-C3N4)), was synthesized using a straightforward one-step hydrothermal method with H2O2 as an oxidant. The H2O2 incorporation into the xTCN composite facilitated the enrichment of oxygen (O) in titanium dioxide (TiO2). This synthesis process effectively reduced the bandgap energy, minimizing the recombination of photogenerated carriers. Concurrently, an O atom was integrated into the g-C3N4 molecule, which altered its bandgap structure and enhanced the photogenerated electron-hole separation efficiency. The dual modification effect was observed when 0.9TCN was used as the catalyst, which converted 77% of benzalcohol with a selectivity exceeding 99%. Additionally, five cycles of reuse only slightly decreased the benzalcohol conversion (by 16%) and selectivity (by 9%), indicating good reusability of the xTCN photocatalyst. The xTCN photocatalyst had an unchanged molecular structure before and after the photocatalytic reaction, demonstrating its superior light stability. The potential photocatalytic reaction mechanism was explored through an active species capture experiment and a Mott-Schottky (M-S) curve test. The results of these studies suggested that •O2- and •OH were the primary reactive species in the photocatalytic reaction.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Boyang Qin,Jiao Chen,Fan Xu,Jinxin Zou,Wenfang Wang,Yu Lv,Luyu Tian,Lan Zhou,Jun Feng
Developing efficient heterojunction structures is of critical importance for boosting solar energy conversion in photocatalysis. Herein, a ZnS-ZnO heterojunction is fabricated via pyrolysis of zeolitic imidazolate framework-8 (ZIF-8) followed by in-situ sulfidation. Due to the formation of heterojunction, the separation efficiency of photogenerated carriers can be efficiently enhanced. As a result, the as-fabricated ZnS-ZnO heterojunction exhibited a H 2 O 2 formation rate of 6.88 mmol g⁻¹ h⁻¹ , which is 3.75-fold that of ZnO. The mechanism revealed that •OH and •O 2 - were active species involved in the photocatalytic H 2 O 2 production process. Moreover, the as-prepared samples have been successfully applied to degrade norfloxacin and exhibited excellent removal efficiency. This work provides an efficient route to develop highly efficient photocatalyst based on metal-organic frameworks (MOF).
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