CHEMICAL PHYSICS LETTERS
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2024
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IF 2.8
Yelin Ding,Yiwei Zhao,Zhihui Deng,Kai Lian,Zhengtong Wang,Xiaohui Liu,Chun Sun
Halide perovskites have attracted widespread attention in the fields of photovoltaics, LEDs, lasers, and photocatalysis due to their unique optoelectronic properties. Here, we proposed a method to synthesize CsPbBr 3 /TiO 2 composite material by embedding precursors into mesoporous titanium dioxide pores and inducing in-situ growth of the perovskites within the pores. Due to the encapsulation of mesoporous TiO 2 , CsPbBr 3 maintains its excellent luminescent characteristics in water, air, and at high temperatures. Furthermore, the Z-type heterojunction structure formed between mesoporous TiO 2 and internal CsPbBr 3 significantly enhances the photo-generated current, and the response time has increased by 1.7 times.
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高影响因子
CHEMISTRY OF MATERIALS
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2024
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IF 7.2
Huan Tian,Yi Liu,Feng-Lei Jiang
Perovskite nanocrystals attract growing interest owing to their unique optoelectronic properties. However, their chemical stability is relatively poor due to their ionic nature. In this work, we found that inorganic cations (e.g., Cs+) and ligands (e.g., didodecyldimethylammonium bromide, DDAB), used in the synthesis of CsPbBr3 nanocrystals (NCs) at ambient temperature, quickly converted CsPbBr3 NCs to Cs4PbBr6 NCs during the synthesis or postsynthetic treatment. These cations (Cs+, DDA+) were involved in both the chemical composition and dissociation of CsPbBr3 NCs. Nevertheless, DDA+ induced the generation of an impurity in addition to Cs4PbBr6 NCs due to its different nature from that of Cs+. The transformation process was observed by optical spectroscopy and transmission electron microscopy. The reverse transformation of Cs4PbBr6 NCs to CsPbBr3 NCs can be carried out completely by adding sufficient PbBr2 into Cs4PbBr6 NCs. Therefore, the forward and backward reactions were driven by Cs+ and Pb2+. With additional DDAB for passivation during the reverse transformation, the resulting product possessed a better photoluminescence quantum yield (PLQY, ∼90%) compared with that without the involvement of DDAB (∼69%). By considering the Cs4PbBr6 NCs as the Cs source, the reverse transformation can be analogized to the synthesis of CsPbBr3 NCs, providing a possible strategy for synthesizing luminescent perovskite NCs at room temperature with theoretical stoichiometry.
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FOOD CHEMISTRY
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2024
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IF 8.5
Xinmiao Wang,Qian Wang,Dong Cai,Jinghan Yu,Xuan Chen,Xu Guo,Peiyong Tong,Xiaoyang Liu,Fawen Yin,Dayong Zhou
HPLC-UV analysis was used to evaluate the enzymatic degradation characteristics of tyrosol acyl esters (TYr-Es) and alkyl gallates (A-GAs). Among various hydrolytic enzymes, TYr-Es can be hydrolyzed by pancrelipase, while A-GAs cannot be hydrolyzed by pancrelipase. Interestingly, carboxylesterase-1b (CES-1b), carboxylesterase-1c (CES-1c) and carboxylesterase-2 (CES-2) are able to hydrolyze TYr-Es and A-GAs, and thus to liberate tyrosol (TYr) and gallic acid (GA). By contrast, the degrees of hydrolysis (DHs) of TYr-Es and A-GAs by CES-1b and CES-1c were significantly higher than those by CES-2. Meanwhile, the DHs of TYr-Es were much higher than those of A-GAs. Especially, the DHs firstly increased and then decreased with the increasing alkyl chain length. Besides, DHs positively correlated with the unsaturation degree at the same chain length. Through regulating carbon length, unsaturation degree and the ester bond structure, controlled-release of phenolic compounds and fatty acids (or fatty alcohols) from phenolic esters will be easily achieved.
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Jie Huang,Lingjie Hu,Liuying Wang,Weichao Wang,Chaoqun Ge,Long Wang,Mengzhou Chen,Renbing Wu,Gu Liu,Bin Wang
The simultaneous achievement of controllable electromagnetic wave absorption and electrochromism through micro-nanostructure design holds significant importance for radar stealth and visible light compatibility in complex surveillance environments. However, the synergistic design of anion insertion/intercalation and dielectric loss coordination still face significant challenges. Herein, CPBs-VO NWs composites with excellent electromagnetic wave absorption and electrochromic performance are prepared by in situ growth of CsPbBr 3 quantum dots on the surface of V 2 O 5 nanowires leveraged by the chelation effect of Pb-O bonds. The loading concentration of CsPbBr 3 quantum dots on the surface of V 2 O 5 nanowires is designed to regulate the formation and breakdown of Pb-O bonds, facilitating the investigation of the energy transfer process at the interface. The analysis reveals that the formation of Pb-O bonds enhances electron transfer across multiscale heterogeneous interfaces, resulting in increased local charge density differences, polarization, and conductivity. Additionally, it aids in the valence state change of vanadium ions through bridging, thereby achieving efficient electromagnetic wave absorption and compatibility with electrochromic performance. This study provides an insight at the atomic-level into performance enhancement and compatibility of visible light and radar stealth by precisely controlling the interface sites.
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MICROCHEMICAL JOURNAL
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2024
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IF 4.9
Mengyao Gao,Chen Yan,Na Li,Yun Wei
Eugenol has many biological and pharmacological activities such as antioxidant, anticancer, anti-inflammatory, antibacterial and anesthetic. In view of its wide range of beneficial activities, it is crucial to establish a method for the separation and purification of active components from clove. In this study, an electroosmotic coupled with particle-assisted deep eutectic solvent flotation method was established for the enrichment of eugenol from clove. Ten deep eutectic solvent (DES) extraction systems based on menthol as the hydrogen bond acceptor (HBA) were screened, and butanol was determined as the hydrogen bond donor (HBD) to prepare the optimal DES as extractant for extracting eugenol. Under the optimum operating conditions including solid–liquid ratio of 1:30, flotation time of 50 min, nitrogen flow rate of 55 mL/min, salt content of 20 g, pH of the clove suspension of 5.2, applied voltage of 15 V, copper electrode at the bottom, the yield of eugenol was 45.89 ± 1.61 mg/g. Compared with other extraction methods, the extraction rate was greatly improved. The electroosmotic coupled with particle-assisted deep eutectic solvent flotation method provides a green and efficient enrichment strategy for natural product, which has broad application prospects.
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Molecular Catalysis
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2024
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IF 3.9
Jianwei Yuan,Kwame Nana Opoku,Pin Zhou,Jiaqing Cao,Yaorao Gao,Haoyang Peng,Baoliang Liu,Xiaohui Chen,Zhenwei Zhang,Fu Yang
The highly efficient green catalytic synthesis of jet fuel from low-chain biomass molecules is very attractive to afford sustainable development. Herein, ultrafine Ni nanoparticles assembled on Nb 2 O 5 nanofibers were constructed and effectively utilized in the reductive coupling of n-octanoic acid, offering a novel approach distinct from traditional hydrogenation methods for fatty acids. During the process, a synergistic effect was observed between the metallic Ni phase and the fibrous Nb 2 O 5 , facilitating immediate ketonization following reduction. This enabled the conversion of n-octanoic acid into pentadecane, a crucial component of aviation kerosene. The key factor driving this conversion was the attainment of a production rate of 8-pentadecanone higher than that of n-octane, particularly under optimal conditions, resulting in a significant yield of pentadecane. The catalytic assessment results show that adjusting Ni loading altered the performance of the catalyst in which 1.0 % Ni/Nb 2 O 5 afforded the best catalytic activity. By precisely controlling the reaction temperature at 300 °C and maintaining a hydrogen pressure of 1 MPa, an impressive pentadecane yield of 70.5 % was achieved. This innovative approach, which combines reduction with ketonization, offers a promising strategy for producing long-carbon chain alkanes from short-carbon chain fatty acids within a single reactor. This not only reduces economic costs but also streamlines overall processes, presenting a significant advancement in sustainable fuel production.
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高影响因子
ACS Applied Nano Materials
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2025
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IF 5.5
Qiangshuai Wang,Sengui Liang,Jinshuo Liu,Yuanyuan Xie,Qi Pang,Zhao-Qing Liu,Yibo Chen
Photocatalytic conversion of carbon dioxide (CO2) to carbon-based fuels is a promising approach to alleviating environmental and energy problems. Therefore, designing photocatalysts with morphological structures that favor gas–solid reactions and exhibit exceptional catalytic efficiencies is strongly demanded. In this work, a porous-framed heterostructure, constructed by anchoring Cs4PbBr6 perovskite nanocrystals on MnO2 hollow spheres, exhibits a 1.8-fold enhancement in the total electron consumption rate (95.3 μmol g–1 h–1) for CO2 photoreduction compared to the original Cs4PbBr6 nanocrystals. Detailed optoelectronic characterizations and theoretical calculations demonstrate that the electronic interactions in the heterointerface trigger disproportionation of Mn and help to expose active Mn sites that attract electrons, thus improving the CO2 activation and the following hydrogenation step to produce COOH*. The open and through porous structure also contributes to the enhanced reaction rate by accelerating mass transfer during the photoreduction reaction. This study provides valuable insights for the development of efficient catalysts for CO2 photoreduction in gas–solid reactions.
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高影响因子
Science China-Materials
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2024
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IF 6.8
Liang Chunxiao,Wang Dianyu,He Shaofan,Zhang Lu,Xia Fan,Tian Ye
Calcium-gated nanochannels in vivo play an important role in many life activities. Inspired by biological ion channels, artificial ion gating has been extensively studied. However, conventional ion gating relies on asymmetric charge structures and fixed nanochannel sizes, resulting in difficult channel blocking and low gating ratios. Herein, a dynamic liquid film nanochannel is constructed by inserting an oil droplet into a carboxylated glass capillary filled with ion solution. The liquid film between the oil and capillary is used as a nanochannel to transport ions and molecules, and the height of the nanochannel can be flexibly controlled by the electrostatic force between the oil–water and water–solid interfaces. The switching of the liquid film nanochannel depends on the ion valence. Compared to monovalent ions, the introduction of multivalent ions yields less negative zeta potential at both the oil–water and water–solid interfaces, which in turn reduces the electrostatic repulsion force between the oil–water and water–solid interfaces, resulting in the nanochannel changing from the “ON” state to the “OFF” state. The system shows good cyclic gating performance and high gating ratios up to ∼1000. Moreover, this cation-gated liquid film nanochannel enables controlled transport of molecules such as rhodamine 6G. In this paper, we present a convenient intelligent nanochannel capable of regulating the transport of ions and molecules within the liquid film simply by adjusting the electrostatic force between the oil–water and water–solid interfaces. This research holds promise for applications in drug delivery, biosensing, species separation, and beyond.
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FOOD HYDROCOLLOIDS
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2024
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IF 11
Ke Zhang,Lai Jiang,Ru-Kang Chen,Yu Shi,Yu-Gang Shi,Yue-Wen Chen,Rammile Ettelaie,Ping Li
This study aims to construct a versatile film fabricated by gallic acid/octanoic acid-grafted-chitosan (GA/OA- g -CS) for high photodynamic antibacterial and antibiofilm efficacy with blue light (BL, 420 nm) irradiation. First, the GA/OA- g -CS conjugates were synthesized by a green radical-induced grafting reaction in the redox system composed of ascorbic acid/hydroxyl peroxide (AA/H 2 O 2 ). Then, the molecular structural and physicochemical characteristics of the conjugates, as well as the mechanisms of the free radical grafting reaction were further studied. Ascorbate radical ( Asc • − ) and hydroxyl radical (•OH) were produced in the AA/H 2 O 2 system, and •OH reacted with CS to produce CS macro-radicals (•CS). UV–vis, Fourier transform infrared, nuclear magnetic resonance spectroscopy, X-ray diffraction (XRD), and thermogravimetric analysis confirmed that GA/OA was attached onto CS through •OH. Notably, the films constructed by GA/OA- g -CS exhibited robust multi-modal functionalities, including intriguing bacteria-capturing and contact-killing, as well as BL-driven photodynamic sterilization, ascribed to the inherent merits based on the massive photoactive GA, hydrophobic and high membrane affinity of OA within the CS chains. As a result, the GA/OA- g -CS (2:1) film plus BL irradiation can efficiently eradicate Escherichia coli ( E. coli ), Staphylococcus aureus ( S. aureus ) and their biofilms. After BL irradiation for 30 min, the GA/OA- g -CS (2:1) film showed a reduction of 5.2 Log CFU/mL against E. coli . More importantly, the film with BL irradiation can efficiently not only inhibit the formation of biofilms but also jeopardize the matured biofilms. This research provides a potential platform and promises for applications in active and intelligent food packaging.
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高影响因子
INDUSTRIAL CROPS AND PRODUCTS
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2024
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IF 5.6
Xinlin Zhang,Xinyu Yan,Zihui Cai,Lina Fu,Xinyue Dong,Jihong Cui,Hangrong Zheng,Mingyue Xu,Yujie Fu
In the current work, a temperature-responsive system consisting of a fatty acid-based hydrophobic deep eutectic solvent and a choline chloride (ChCl)-based hydrophilic deep eutectic solvent was innovatively developed. It was used to extract and separate polar compounds (chlorogenic acid, rutin, hyperin, isoquercetin, hydroxy-α-sanshool) from Zanthoxylum bungeanum Maxim. peels (ZBMP). Different molar ratios of the hydrophobic deep eutectic solvent (DES) composed of decanoic acid (DA)-octanoic acid (OA) and hydrophilic DES composed of ChCl-levulinic acid (Lev) were chosen as the switching medium. Under the optimal extraction conditions, the TRBDES consisting of hydrophilic DES (ChCl: Lev/1:2): hydrophobic DES (OA: DA/2:1): H 2 O (v/v/v,5/5/1) demonstrated a greater total extraction rate and distributive efficiency than the conventional solvents. High DPPH radical scavenging capacity of target compounds (IC 50 = 0.29 mg/mL) from the bottom phase recovered by D101 macroporous resin. Hydrogels prepared by DES containing extracts in the top phase showed significant inhibition of E. coli (15.5 ± 0.7 mm). and S. aureus (21.0 ±1.4 mm). The solvent morphologies and the intrinsic switching mechanism were observed and illustrated. Moreover, density functional theory (DFT) calculations showed that hydrogen bond production is crucial for extraction. This work provides a resource for exploring and utilizing TRBDES for environmentally friendly extraction of various bioactive active ingredients from plant sources.
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高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2024
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IF 5.3
Liling Wang,Yanbin Wang,Yuchuan Qin,Liang He
U.S. pecan nuts are rich in oil and phenolic compounds with important biological functions. At present, the reports about simultaneous extraction of oil and phenolic compounds are limited, and the traditional procedure is complicated and the yield is low. In this study, a new emulsion formed by hydrophobic deep eutectic solvent (DES) and water was used as extractant for synchronous extraction of oil and phenolic components from U.S. pecans, and subsequently the two were recovered from the upper and lower phases based on the incompatibility of DES and water, respectively. The oil and phenolic compounds obtained by the optimization of extraction conditions were 615.29 mg/g and 82.11 mg/g, respectively, which were higher than those obtained by conventional methods. At the same time, the extraction mechanism is discussed through the extraction kinetics and thermodynamics. The extraction process conformed to the Fick’s second law, and it was an endothermic process. After directional recovery by macroporous resin and back-extraction, the effectiveness of the method was proved by the analysis of fatty acid composition of oil, spectral characterization of phenolic compounds and antioxidant activities.
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JOURNAL OF MEMBRANE SCIENCE
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2024
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IF 8.4
Miaomiao Zhang,Ziwen Liu,Zhuoyu Yin,Chao Yang,Mengying Long,Bohui Lyu,Xinda You,Runnan Zhang,Hong Wu,Lijuan Cheng,Zhongyi Jiang
Polyamide (PA) membranes prepared by interfacial polymerization (IP) provide an effective solution for efficient desalination. The IP reaction, as a diffusion-controlled polymerization reaction, regulates the storage and diffusion of monomers in the IP process to achieve effective regulation of the PA membrane structure. Higher initial monomer concentration and slower monomer release rate can effectively reduce the membrane thickness and enhance the permeance of the membrane. Herein, ionic covalent organic framework (iCOF) materials with well-developed and ordered pore channels bearing high-density –SO 3 H groups are used to construct a porous and charged interlayer to regulate the release process of monomers during the IP process. The well-ordered pore structure of iCOF provides sufficient storage space for amine monomers and uniform monomer distribution, accelerating the closure of the incipient film. Moreover, the electrostatic interactions between the high density of negatively charged anionic groups on iCOF and the positively charged amine monomer can reduce the diffusion coefficient of the amine monomer by a factor of two. The above two effects resulted in a nearly 10-fold reduction in the thickness of the PA separation layer and an increase in water permeance up to 24.8 L m −2 h −1 bar −1 , nearly three times improvement compared to unmodified PA membrane.
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