JOURNAL OF CATALYSIS
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2024
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IF 6.5
Liru Song,Wenyu Wang,Jun Tang,Xu Guo,Xiantai Zhou,Qingping Ke
Selective aerobic epoxidation of allylic alcohols and olefins presents a promising solution to the modern chemical industry. However, the development of non-noble metal catalysts with superior catalytic performance for this reaction remains a significant challenge. This study introduces a plasmonic photothermal-catalytic system centered around nano LaSrCoNiO 6 (LSCNi-N) catalyst, enabling the epoxidation of cinnamyl alcohol and styrene mediated by LSPR effect under visible light illumination (>420 nm). This catalyst exhibits superior epoxidation catalytic performance, with selectivities of up to 72.3 % in a 93.4 % conversion of cinnamyl alcohol and 91.8 % selectivity of styrene oxide at almost 100 % conversion of styrene. Mechanistic studies reveal that the high selectivity derives from the in-situ photochemical formation of H 2 O 2 mediated by the localized surface plasmon resonance effect of LSCNi-N and hole scavenger effect of cinnamyl alcohol. These findings highlight the potential of designing plasmonic transition-metal oxidic catalysts to overcome challenges in selectively synthesizing fine chemicals through visible light catalysis.
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INTERNATIONAL JOURNAL OF FOOD SCIENCE AND TECHNOLOGY
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2024
·Vol. 59
·期 7
·4880-4891
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IF 2.6
Meixu Chen,Liling Wang,Xinyi Huo,Qilin Xu,Yaofeng Ying,Linlin Wu,Yifeng Zhou,Jun Huang
Summary In this study, a full factorial design with three temperature levels (20, 30 and 40 °C), three moisture content (MC) levels (8%, 15% and 22%), and four storage times (7, 14, 21 and 28 days) was used to investigate the changes of aflatoxins (AFs), active constituents, and antioxidant activities in Hangbaiju (HBJ, Chrysanthemum morifolium ) after simulated inoculation with Aspergillus parasiticus. The results showed that AFs could be produced in the range of 20~30 °C and 8~22% MC after mould infection, but both mould growth and AFs production were inhibited under the tested MC condition at 40 °C. The analysis of variance ( anova ) indicated that the temperature, time, interaction between the temperature and time, and interaction between MC and time had significant effects on the total aflatoxins (AFTOT) accumulation. Under 20 and 30 °C, AFTOT in inoculated HBJ usually increased with the increase of MC and storage time, while its active constituents and antioxidant activities decreased with the increase of AFTOT under corresponding storage conditions. Pearson correlation analysis suggested that relatively stronger negative correlations were observed between luteolin-7-O-glucoside (LUT7G), total phenolic content (TPC), total flavonoid content (TFC), and AFTOT. Grey correlation analysis (GCA) showed that antioxidant activity was highly linked to the content of active constituents, and the characteristic flavonoid LUT7G exhibited the highest grey correlation degrees (GCDs) in the three antioxidant activities. The AFTOT reached the highest level (31.15 μg kg −1 ) after 28 days of storage at 30 °C and 22% MC; meanwhile, LUT7G, TPC and TFC decreased by 93.66%, 20.77% and 55.50%, respectively, and all the three antioxidant activities indicated more than 25% reduction. This is the first study about the changes and relationships of AFTOT, active constituents and bioactivities in the medicinal food influenced by A. parasiticus under different storage conditions. These results provide important references to prevent AFs production and quality control for HBJ and other medicinal foods influenced by A. parasiticus in storage strategy.
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MICROCHEMICAL JOURNAL
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2024
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IF 4.9
Jiadi Lian,Bifeng Chen,Qing Han,Hangqing Xie,Jing Xu
Cutting fluid (CF) ensures machining accuracy and improves tool life in machining, which is of great significance for its impurity content detection and life cycle evaluation. In this paper, citric acid and arginine were used as carbon and nitrogen sources, photoluminescent (PL) nitrogen-doped carbon quantum dots (N-CDs) with a particle size ranging from 8 to 14 nm and well dispersion in water-based CF were synthesized by a one-pot hydrothermal reaction method. The N-CDs have the best signal under 360 nm ultraviolet light excitation, which well avoids the autofluorescence of the CF. The N-CDs dispersion have good selectivity and linearity in the Fe 3+ concentration range of 2 to 80 μM, and the detection limit is 1.2 μM. The N-CDs were used to detect the concentration of Fe 3+ in CF with different working hours, and the results were consistent with the results of coupled plasma emission spectroscopy. This study provides an intelligent sensing platform for the highly sensitive and selective detection of Fe 3+ in the CF environment, and provides a promising strategy for the evaluation of the CF lifetime.
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FOOD CHEMISTRY
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2024
·
IF 8.5
Jiawei Xue,Changyao Ma,Shuqi Yang,Shuchang Guo,Xiaoyu Yin,Junfeng Fan,Xiuting Li,Mengze Wang,Guoxin Teng
In this study, we inserted a dynamic chemical reaction system that can generate CO 2 into Janus hydrogel (JH) to develop a multidimensional preservation platform that integrates hygroscopicity, antibacterial activity, and modified atmospheric capacity. The double gel system developed using sodium alginate/trehalose at a 1:1 ratio effectively encapsulated 90% of citric acid . Furthermore, CO 2 loss was avoided by separately embedding NaHCO 3 /cinnamon essential oil and citric acid microcapsules into a gelatin pad to develop JH. Freeze-dried JH exhibited a porous and asymmetric structure, very strongly absorbing moisture, conducting water, and rapidly releasing CO 2 and essential oils. Furthermore, when preserving various fruits and vegetables in practical settings, JH provided several preservation effects, including color protection, microbial inhibition, and antioxidant properties. Our study findings broaden the application of JH technology for developing chemical reaction systems, with the resulting JH holding substantial promise for cold chain logistics.
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Nature Communications
·
2025
·Vol. 16
·期 1
·1-11
·
IF 15.7
Shi Chenyang,Wang Jianan,Lei Xia,Zhou Qisen,Wang Weitao,Yang Zhichun,Liu Sanwan,Zhang Jiaqi,Zhu He,Chen Rui,Pan Yongyan,Tan Zhengtian,Liu Wenguang,Zhao Zhengjing,Cai Zihe,Qin Xiaojun,Zhao Zhiguo,Li Jingbai,Liu Zonghao,Chen Wei
The employment of self-assembled molecular hybrid could improve buried interface in perovskite solar cells (PSCs). However, the interplay among hybrid self-assembled monolayers (SAMs) during the deposition process has not been well-studied. Herein, we study the interaction between co-adsorbents and commonly used SAM material, [4-(3,6-dimethyl-9 H -carbazol-9-yl)butyl]phosphonic acid (Me-4PACz) for wide-bandgap (WBG) PSCs. It is found that the co-adsorbent, 6-aminohexane-1-sulfonic acid (SA) tends to fill the uncovered sites without interference with Me-4PACz, ensuring the formation of a dense hole selective layer. Moreover, the use of SA/Me-4PACz mixed SAMs could effectively reduce the interfacial non-radiative recombination loss, optimize the energy alignment at the buried interface and regulate the crystallization of WBG perovskite. As a result, the 1.77 eV WBG PSCs deliver a power conversion efficiency (PCE) of 20.67% (20.21% certified) and an impressive open-circuit voltage ( V OC ) of 1.332 V (1.313 V certified). By combining with a 1.26 eV narrow-bandgap (NBG) PSC, we further fabricate 2-terminal all-perovskite tandem solar cells (TSCs) with a PCE of 28.94% (28.78% certified) for 0.087 cm 2 and 23.92% for mini-module with an aperture area of 11.3 cm 2 .
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JOURNAL OF CONTROLLED RELEASE
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2025
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IF 11.5
Dengke Chen,Yuying Yang,Beibei Li,Yingjuan Yao,Junyi Xu,Rongyan Liu,Jiao Peng,Zhuangpeng Chang,Rui Zhao,Ruigang Hou,Min Lee,Xianghui Xu,Xiao Zhang
Discovering new tactics for healing bone defects becomes a worldwide challenge in osteoporosis patients. The disordered acidic microenvironment plays a pivotal role in driving the imbalance of bone homeostasis regulated by osteoblasts and osteoclasts. However, the scarcity of hydrogel materials developed to optimize local bone microenvironment has made osteoporotic defect healing more challenging. Herein, we present innovative nanocomposite hydrogels with precisely engineered microarchitectures designed to optimize the acidic microenvironment by facilitating crosstalk between exterior and interior spaces, aimed at enhancing the reconstruction of osteoporotic bone defects. The chlorogenic acid grafted chitosan as double-sided crosslinkers is specially designed to not only combine with acid-reversible Laponite® nanosheet via interfacial interactions but also integrate with gold nanorod (a typical photothermal agent) through catechol-Au bond. The supramolecular construction of nanocomposite hydrogels holds promise for achieving a highly continuous and homogeneous pore network microarchitecture. As expected, hydrogels display outstanding spatiotemporal local mild hyperthermia, which accelerates the neutralization reaction between OH − ions released from Laponite® and hydrogen ions (pH ∼ 4.0). The optimized microenvironment restores osteoclast/osteoblast homeostasis, resulting in the promotion of osteoblastogenesis and inhibition of osteoclastogenesis, thereby facilitating the healing of osteoporotic bone defects. This work is hoped to design versatile hydrogels for optimizing the microenvironment, displaying promising integrative substitute materials for clinically effective treatment of osteoporotic bone defects.
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MICROCHEMICAL JOURNAL
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2024
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IF 4.9
Yijie Wang,Xudong Wu,Dan Chen,Linqian Hou,Dezhi Yang,Hong Li,Yaling Yang
The rapid and sensitive detection of glyphosate herbicide in agricultural products is urgent need. Herein, we develop a photosensitive Fe 3 O v -Mo/P nanozyme with defect-rich rough surface by the co-precipitation method. In particular, the Fe 3 O v -Mo/P nanozyme with high-percentage oxygen vacancy (OV) defects and rough surface exhibited superior peroxidase (POD)-like activity and kinetics. More intriguingly, Fe 3 O v -Mo/P nanozyme with strong optical absorption in near-infrared (NIR) region showed excellent light-promoted POD-like activity. It was found that the defect-rich rough surface is conducive to the adsorption of glyphosate to inhibit the POD-like activity of Fe 3 O v -Mo/P. Under near-infrared laser irradiation, the inhibitory effect of glyphosate on the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB) by Fe 3 O v -Mo/P was increased by 2.64 times. A colorimetric platform was developed for the detection of glyphosate with a low detection limit of 0.032 mg L -1 and good selectivity. The method was used to determine the residual glyphosate in coffee, and the recovery efficiency was between 91.20–104.00 %. This work that combines the advantage of defect engineering and NIR provides a strategy for developing high-active nanozyme in pesticide assay.
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Journal of Environmental Chemical Engineering
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2024
·
IF 7.4
Zhaohui Fei,Chi Jiang,Qunwei Tang,Yingfei Hou
To solve the scarcity of fresh water, reverse osmosis (RO) technology for seawater desalination and wastewater reuse has been developed rapidly. However, the performance of RO is limited by poor selectivity towards certain harmful small molecule constituents (e.g., boron in seawater and N-nitrosodimethylamine in wastewater) and the permeability-selectivity trade-off. Herein, a metal polyphenol network interlayer including both hydrophobic zone and monomer adsorption zone is proposed to optimize interfacial polymerization (IP) process for fabrication of RO membrane . This heterogeneous characteristic is endowed by well-chosen phenol (i.e. TTSBI) and metal (Ni). The physicochemical properties of the substrate are also optimized. An ultra-selective RO membrane with thinner separation layer, higher crosslinking degree and larger surface area is obtained. The RO membranes exhibit separation performance beyond the upper selectivity limit for NaCl and hazardous small molecules. The membrane water permeance is 3.50 L m −2 h −1 bar −1 while the NaCl rejection is 99.5 %. Meanwhile, the mechanism of the interlayer influencing IP process is investigated by combining molecular simulation and experimental methods. Our work provides a novel design direction of substrate used for fabricating RO membrane with outstanding performance.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2024
·
IF 3.8
Han Zhang,Hanshu Sun,Yiping Zhao,Yang He,Li Chen
Grafting hyperbranched polymers on polymer membrane surfaces offers a promising route to desalination and boron removal. However, the functional modulation of hyperbranched polymers is still not fully realized, and the specific selective synthesis of terminal hydroxyl groups still needs further exploration. Here, we report a method to prepare high-performance adsorption membranes using hyperbranched polyglycerol (HPG) that can optimize the dendritic distribution of the terminal hydroxyl groups. Poly(caffeic acid) (PCA) was rapidly deposited on the surface of the poly(ether sulfone) (PES) membrane assisted by copper sulfate (CuSO4) and hydrogen peroxide (H2O2), and subsequently, HPG was grafted onto PCA coatings via a covalent bond. The prepared functional modified membrane exhibited excellent performance on salt and boron removal; especially, the maximum boron uptake was 1.661 mmol g–1 at an initial boron concentration of 5.0 mmol L–1, better than most of the traditional adsorption membranes reported. The boron adsorption on the membranes was fitted well with the pseudo-first-order adsorption kinetic model and Langmuir isothermal model. Strikingly, the regeneration efficiency could be recovered to 97% after 10 cycles of acid rinsing and desorption. The functional membrane had good application potential and research value in seawater desalination and boron removal.
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Nature Communications
·
2018
·Vol. 9
·期 1
·1-8
·
IF 12.353
Li Qijun,Zhou Ming,Yang Mingyang,Yang Qingfeng,Zhang Zhixun,Shi Jing
Phosphorescence shows great potential for application in bioimaging and ion detection because of its long-lived luminescence and high signal-to-noise ratio, but establishing phosphorescence emission in aqueous environments remains a challenge. Herein, we present a general design strategy that effectively promotes phosphorescence by utilising water molecules to construct hydrogen-bonded networks between carbon dots (CDs) and cyanuric acid (CA). Interestingly, water molecules not only cause no phosphorescence quenching but also greatly enhance the phosphorescence emission. This enhancement behaviour can be explained by the fact that the highly ordered bound water on the CA particle surface can construct robust bridge-like hydrogen-bonded networks between the CDs and CA, which not only effectively rigidifies the C=O bonds of the CDs but also greatly enhances the rigidity of the entire system. In addition, the CD-CA suspension exhibits a high phosphorescence lifetime (687 ms) and is successfully applied in ion detection based on its visible phosphorescence.
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ACS Applied Materials & Interfaces
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2018
·
IF 8.097
Wen-Ze Qiu,Guang-Peng Wu,Zhi-Kang Xu
Bioinspired polyphenol/polyamine codeposition has been demonstrated by the competence for surface modification; however, the reaction processes including mechanism and kinetics remain superficially understood. In this work, the catechol (CA)–amine reaction has been thoroughly investigated by using CA and two amines m-phenylenediamine and piperazine. We verify that both primary and secondary amines are prone to link with CA through Michael addition to form polyphenol/polyamine oligomers under aerobic and mild-alkaline conditions. Molecular simulations indicate that the Michael addition products are dominant for both aromatic and aliphatic amines with CA, which supports the durable chem- and phystability of the codeposited coatings. The aggregation kinetics of polyphenol/polyamine is provided for the first time, and the formed aggregates show high-adhesive properties, which can be deposited as the skin layers for high-performance nanofiltration membranes.
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CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Jianliang Xiao,Weiyang Lv,Yihu Song,Qiang Zheng
The fabrication of multifunctional graphene-based aerogels is challenging due to the difficulty in controlling the structures and properties to satisfy various demands. Herein, we develop a versatile graphene oxide/nanofiber aerogel (GNA), in which cellulose acetate nanofibers are introduced in graphene aerogels for the first time to prevent the sheets from over-stacking and enhance connectivity of cell walls. This GNA exhibits excellent underwater stability and high adsorption capacity (>800 mg/g) towards cationic dyes. Its density, pore structure and mechanical properties are easily tuned by varying the composition as well as compression deformation. The reshaping ability of GNA combined with co-deposition of polydopamine and polyethyleneimine makes it a superhydrophilic/underwater superoleophobic and shape-stable material to quickly separate oil-in-water emulsions with an extremely high flux (>19,000 L m −2 h −1 bar −1 ). On the other hand, after chemical modification and crosslinking via vapor deposition of hexadecyltrimethoxysilane, GNA turns to be a superhydrophobic and superelastic material that can adsorb organic liquids with an adsorption capacity of 230–734 g/g, being superior to most of known adsorbents. The materials are mass-producible and combine mechanical robustness and easy regeneration, providing a simple strategy for fabrication of multifunctional graphene-based aerogels satisfying various applications in water treatment.
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