INORGANIC CHEMISTRY
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2024
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IF 4.3
Shufang Wu,Yanli Ma,Yue Zhang,Yueyue He,Qi Wang,Ruifang Zhao,Dongying Fu
Ferroelectric materials with Curie temperature (Tc) below room temperature severely limit their practical applications. Although research on hybrid perovskite photoferroelectrics is ongoing, effective regulation of Tc still poses significant challenges. Herein, we utilized the cationic size effect to successfully regulate the Tc of hybrid perovskite photoferroelectric semiconductors. As the perovskitizer was replaced by a smaller-sized MA+ (methylammonium) with a larger-sized EA+ (ethylammonium), not only was the ferroelectricity of the hybrid perovskite well maintained but the Tc of (PA)2(MA)2Pb3Br10 (315 K) to (PA)2(EA)2Pb3Br10 (385 K) (PA is n-propylaminium) increased by 70 K, which was mainly due to the significant increase in the energy barriers that the system needed to overcome during the phase transition. Subsequently, we achieved efficient self-powered X-ray detection through the ferroelectric-induced bulk photovoltaic effect (BPVE) in (PA)2(EA)2Pb3Br10. The devices based on (PA)2(EA)2Pb3Br10 single crystals exhibit an outstanding sensitivity of 95 μC Gy–1 cm–2 and a low detection limit of 239 nGy s–1 at 0 V bias under X-ray radiation. This study provides an effective approach for designing and constructing high-temperature multilayer photoferroelectric semiconductors in the future.
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MICROCHEMICAL JOURNAL
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2025
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IF 5.1
Jianbin Ju,Yuji Ruan,Huifeng Deng,Xiaowen Huang,Guihua Ruan,Yipeng Huang
In this work, thiocyano-functionalized monodisperse dendritic mesoporous silica microspheres (DMS-SCN) were successfully synthesized and utilized as efficient solid-phase extraction adsorbents for the enrichment of eugenol anesthetics in aquatic products. The thiocyano functionalization significantly improves the adsorption capacity of the adsorbent for the four eugenol anesthetics from 723–1092 μg g −1 to 2180–3885 μg g −1 in virtue of the reinforced permanent dipole interactions, π-π stacking interactions, and electrostatic interactions. By coupling DMS-SCN based solid phase extraction with HPLC (SPE-HPLC) method, an analytical method for determination of eugenol anesthetics in tilapia, carp and shrimp was successfully developed. This method achieves low detection limits ranging from 0.32 ng mL −1 to 0.82 ng mL −1 and exhibits a wide linear range from 1 ng mL −1 to 200ng mL −1 . The recoveries for the four eugenol anesthetics range from 85.16 % to 109.1 %, with relative standard deviations between 1.18 % and 8.37 %. The method demonstrates minimal matrix effects and high accuracy. The DMS-SCN based SPE-HPLC method is anticipated to be a valuable tool for the analysis of eugenol anesthetics in complex sample matrices.
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DYES AND PIGMENTS
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2024
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IF 4.1
Song Wei,Xiang Luo,Shaofeng Shao,Lei Zhang
Machine learning-assisted synthesis of new materials has been an ongoing hot topic. Luminescent Ag–Zn–In–S quaternary semiconductor quantum dot thin films have great application potential in many fields because of their excellent photoelectric performance. In this study, an environmentally friendly ionic liquid-assisted approach was employed to prepare high-performance Ag–Zn–In–S luminescent thin films, and machine learning methods were applied to screen the optimal preparation conditions. The photoluminescence (PL) performance, crystal structure, and morphology of the thin films were also been studied. The initial data set was obtained by high-throughput experiments. By comparing machine learning algorithms of Xgboost, Random Forest, Bagging, SVM, Extra Tree, and Gradient Boosting, the Random Forest achieved the best accuracy (r = 0.84, R 2 = 0.847) and was selected to predict the optimal preparation conditions of Ag–Zn–In–S quaternary quantum dot thin films. The machine learning predicted results are in great agreement with the subsequent experimental results, which verifies the accuracy and effectiveness of the machine learning model. This study offers a theoretical foundation for preparing optimal inorganic quantum dot luminescent materials using machine learning.
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Nanoscale
·
2017
·Vol. 10
·期 3
·1532-1539
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IF 7.367
Xiaolong Wu,Liling Ma,Shan Sun,Kai Jiang,Ling Zhang,Yuhui Wang,Haibo Zeng,Hengwei Lin
In this work, a versatile platform for the highly efficient preparation of graphene quantum dots (GQDs) with diverse properties was developed. First of all, an excess amount of oxidants and an additional high temperature step of the Hummers’ method for the synthesis of graphene oxide (GO) was applied to obtain nanosized graphene oxide (NGO). Then, high quality GQDs (quantum yields up to 18.2%) with different photoluminescence emission wavelengths, adjustable hydrophilicity–hydrophobicity, and selective cell organelle imaging capacity can be facilely achieved through a one-pot hydrothermal reaction between the NGO and ammonia, fatty primary amines, or amino-substituted organelle targetable compounds, respectively. The superior features of the as-developed method are extremely high conversion ratio (ca. 60 wt% from graphite to the functional GQDs) and great expandability. Such a high conversion ratio is deemed to be due to effectively decreasing aggregation of the NGO (in comparison with GO) during the post-treatment process. This work provides a robust strategy for the highly efficient preparation of GQDs with diverse properties and functions, and is believed to be beneficial for boosting their applications in the future.
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CHEMICAL ENGINEERING JOURNAL
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2017
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IF 6.216
Jing Ouyang,Chenghui Zheng,Wei Gu,Yi Zhang,Huaming Yang,Steven L. Suib
To understand the effect of porous parameters and chemical components on CO 2 capturing performance of solid state amine absorbents and their kinetic parameters, a clay mineral-based CO 2 absorbent was prepared by impregnating five different liquid amines onto SiO 2 nanowire clusters from fibrous sepiolite (Sep). Characterization was conducted by XRD, SEM, FTIR, and N 2 adsorption–desorption isotherm, CO 2 adsorption performances were measured by TGA. After acid treatment, the raw Sep mineral changed into amorphous silica nanowires, and the largest S BET of the obtained SiO 2 nanowires reached 320 m 2 /g, which was 8 times larger than the pristine mineral. Amongst the adapted amines, tetraethylenepentamine (TEPA) showed superiority in the CO 2 adsorption capacity. The optimized adsorption capacity reached 3.7 mmol/g at 75 °C from a CO 2 + N 2 mixture on a ∼50 wt% TEPA loaded SiO 2 sample, and the capacity remained 3.6 mmol/g after ten circles of adsorption/desorption tests. The pore size and pore structure of the matrix, rather than the surface area, will obviously affect the adsorption ability of the product. Kinetic parameters for the CO 2 adsorption process fitted well with a fractional-order model, confirming that the CO 2 adsorption process by the solid absorbent should be a combination of both physical and chemical reactions. Results in this article provide detailed parameters for preparing and understanding these clay mineral based solid state CO 2 absorbents.
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CHINESE JOURNAL OF CATALYSIS
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2018
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IF 3.525
Bing Zhang,Danping Hui,Yingxuan Li,He Zhao,Chuanyi Wang
The nickel-based complex Ni-CH 3 CH 2 NH 2 -intercalated niobate layered perovskite Ni-CH 3 CH 2 NH 2 /H 1.78 Sr 0.78 Bi 0.22 Nb 2 O 7 was synthesized via a facile in situ chemical reaction method. Using ultrathin H 1.78 Sr 0.78 Bi 0.22 Nb 2 O 7 nanosheets and nickel acetate as precursors. The composition, structure, photophysical properties, and photocatalytic activity for H 2 production of Ni-CH 3 CH 2 NH 2 /H 1.78 Sr 0.78 Bi 0.22 Nb 2 O 7 were studied systematically. The photocatalyst loaded with 0.5 wt% Ni exhibited the highest H 2 evolution rate of 372.67 μmo/h. This was 0.54 times higher than the activity of the H 1.78 Sr 0.78 Bi 0.22 Nb 2 O 7 nanosheets. The activity of the optimized Ni-CH 3 CH 2 NH 2 /H 1.78 Sr 0.78 Bi 0.22 Nb 2 O 7 was comparable to that of the Pt-loaded sample under the same reaction conditions. The photocatalytic activity of the Ni-CH 3 CH 2 NH 2 /H 1.78 Sr 0.78 Bi 0.22 Nb 2 O 7 was mainly attributed to the excellent separation of photogenerated carriers, after formation of the intercalated complex Ni-CH 3 CH 2 NH 2 . This study provides a facile strategy to synthesize a non-precious metal-loaded photocatalyst for H 2 production.
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AQUACULTURE NUTRITION
·
2024
·Vol. 2024
·期 1
·6670740
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IF 3
Dingfei Ma,Qiangwei Li,Yuanyuan Xie,Youqin Kong,Zhili Ding,Jinyun Ye,Chenglong Wu,Yan Liu
Erucic acid (EA) in rapeseed oil has adverse effects on terrestrial animal and fish health. However, its antinutritional role in fish remains unclear due to the limited information on EA. Therefore, this study was conducted to assess the impact of EA on growth performance, antioxidative capacity, fatty acid profile, and lipid metabolism in tilapia. Six diets containing different amounts of EA (0, 3, 6, 12, 20, and 27 g/kg diet) were fed to tilapia (initial weight: 3.01 ± 0.01 g) for 8 weeks. The results exhibited that dietary EA did not affect growth performance but remarkedly increased the crude lipid contents (in the whole body, liver, and muscle). It also markedly increased the levels of low-density lipoprotein cholesterol, total cholesterol, nonesterified fatty acids, and triglyceride in the liver and serum in a dose-dependent manner. The EA groups had lower values of total superoxide dismutase, total antioxidant capacity, catalase, and higher activities of aspartate aminotransferase and alanine aminotransferase, as dietary EA levels increased. Feeding fish with diets containing EA (20 and 27 g/kg diet) significantly increased the malondialdehyde content. Moreover, dietary EA greatly altered the fatty acid profile in the liver and muscle. It especially elevated the percentages of C18 : 2n-6, C20 : 1n-9, and C22 : 1n-9 while decreasing the C18 : 0 and C16 : 0 levels. When the levels of EA in diets were 12, 20, and 27 g/kg, genes correlated with lipophagy, lipolysis, and β -oxidation were significantly reduced. Meanwhile, genes concerned in triglyceride synthesis were largely increased in the liver and muscle. In summary, high-dose EA (20 g/kg diet) in the diets significantly induced fat accumulation, hepatic oxidative damage, and abnormal lipid metabolism in tilapia. The current findings expand our understanding on the antinutritional role of EA in lipid homeostasis and fish health.
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Journal of Environmental Chemical Engineering
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2024
·
IF 7.4
Xiaoli Ren,Xiujun Wang,Jian Zhang,Ming Duan,Yan Xiong,Shenwen Fang
For the treatment of produced water from offshore oilfields, flotation is an essential process. In recent years, there has been an increase in the amount of produced water, resulting in the need of efficient flotation agents. Recent studies show that amphiphilic polymers perform well in oil removal by flotation, but current researches focus more on the influence of monomer type rather than that of copolymer sequence structure on the oil removal performance. In this study, acrylate and N-(3-dimethylaminopropyl) methacrylamide (DPM) were used as monomers to synthesize copolymers with different sequence structures via free radical polymerization and reversible addition-fragmentation chain transfer polymerization (RAFT). The effects of copolymer sequence structure and CO 2 absorption on the interfacial properties and flotation performance of the copolymer were investigated, meanwhile, the effect of CO 2 absorption on the flotation performance was explained by using molecular dynamics (MD) simulation. It was found that the flotation performance of random copolymers was close to that of diblock copolymers, while triblock copolymers had much better flotation performance. Especially, the ethyl acrylate-DPM-ethyl acrylate triblock copolymer (EDE) with hydrophobic groups on the outside and hydrophilic groups in the center had the best flotation performance, with a turbidity reduction rate of 95.4 %. After CO 2 absorption, the flotation performance of most copolymers decreased, while the flotation performance of triblock copolymers with hydrophilic groups on the outside and hydrophobic groups in the center increased. The MD simulation results showed that the introduction of CO 2 into DPM-ethyl acrylate-DPM triblock copolymer (DED) increased the extensibility of copolymer chain, which was helpful for the flotation. This study provides some theoretical guidance for the microstructural design of flotation agent and presents a new possibility for the reuse of CO 2 .
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Food Bioscience
·
2024
·
IF 4.8
Junfeng Li,Min Guo,Cuiping Yuan,Tiezhu Li,Jie Zhang,Li Ren
ABSTRACT Peroxisome proliferator-activated receptor γ (PPARγ) was a major transcription factor and performed an essential function in the regulation of lipid metabolism. Ellagic acid (EA) was a natural phytochemical extracted from berries and pomegranates, and research had demonstrated its ameliorative effects on lipid metabolism disorders. We intended to explore the interventional effect and mechanism of action of EA on hyperlipidemia. In vitro experiments revealed that EA could reduce lipid accumulation in HepG2 cells. EA was found to bind stably to PPARγ, suppressing its nuclear translocation as well as its luciferase activity. It could also down-regulate the expression of genes and proteins related to lipid metabolism upstream and downstream of PPARγ. To explore the impact of EA on hyperlipidemia in vivo from different levels and perspectives, we established hyperlipidemia mice and hyperlipidemia zebrafish models. Consistent with the in vitro results, in vivo experiments revealed that EA attenuated lipid accumulation in hyperlipidemia mice and reduced the levels of related inflammatory factors in their serum. EA also inhibited lipid accumulation by decreasing the expression of upstream and downstream lipid-associated genes of pparg in hyperlipidemia zebrafish. In conclusion, EA could effectively improve hyperlipidemia by regulating PPARγ.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2025
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IF 4.6
Shili Qin,Yu Gao,Dan Wang,Xingyu You,Fuquan Zhao,Hongtao Chu,Ming Zhao,Fenglong Jin
Luminescent covalent organic frameworks (LCOFs) with large π-conjugated system were a family of crystalline porous materials with promising applications. However, the actual application and quenching mechanisms of the LCOFs with dual-functionality remain poor understood. Here, a micro-mesoporous luminescent covalent organic framework (LCOF-DT) with high crystallinity and good stability was prepared by the solvothermal method using 1, 3, 5-tri-(4-aminophenyl) benzene and 2, 5-dihydroxyterephthalaldehyde as monomers through Schiff base condensation reaction. The LCOF-DT exhibited not only a good sensitivity and colorimetric visualization for water in conventional organic solvents over a relatively broad linear range (0 %–50 %) but also showed exceptional fluorescent recognition capability for vitamin K1, even in the presence of 17 different competing substrates. Additionally, a sensitive, specific, rapid, and practical fluorescent method for vitamin K1 detection in the commercially vitamin K1 tablets was developed. Based on the aforementioned research, designing covalent organic frameworks with multifunctional fluorescent response would be a tendency in the further application of detection technology.
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ADVANCED FUNCTIONAL MATERIALS
·
2012
·Vol. 22
·期 22
·4732-4740
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IF 10.179
Shoujun Zhu,Junhu Zhang,Shijia Tang,Chunyan Qiao,Lei Wang,Haiyu Wang,Xue Liu,Bo Li,Yunfeng Li,Weili Yu,Xingfeng Wang,Hongchen Sun,Bai Yang
The bandgap in graphene-based materials can be tuned from 0 eV to that of benzene by changing size and/or surface chemistry, making it a rising carbon-based fluorescent material. Here, the surface chemistry of small size graphene (graphene quantum dots, GQDs) is tuned programmably through modification or reduction and green luminescent GQDs are changed to blue luminescent GQDs. Several tools are employed to characterize the composition and morphology of resultants. More importantly, using this system, the luminescence mechanism (the competition between both the defect state emission and intrinsic state emission) is explored in detail. Experiments demonstrate that the chemical structure changes during modification or reduction suppresses non-radiative recombination of localized electron-hole pairs and/or enhances the integrity of surface π electron network. Therefore the intrinsic state emission plays a leading role, as opposed to defect state emission in GQDs. The results of time-resolved measurements are consistent with the suggested PL mechanism. Up-conversion PL of GQDs is successfully applied in near-IR excitation for bioimaging.
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TALANTA
·
2012
·
IF 3.794
Xiaoyu Mu,Li Qi,Haizhi Zhang,Ying Shen,Juan Qiao,Huimin Ma
Ionic liquids (ILs) with l -proline ( l -Pro) as cations have been developed for the novel chiral ligands coordinated with Cu(II) in chiral ligand exchange capillary electrophoresis (CLE-CE). Four kinds of amino acid ionic liquids (AAILs), including [ l -Pro][CF 3 COO], [ l -Pro][NO 3 ], [ l -Pro][BF 4 ] and [ l -Pro 2 ][SO 4 ], were successfully synthesized. Among them, [ l -Pro][CF 3 COO] was selected as the model ligand to optimize the separation conditions. The influences of AAIL concentration, pH, and methanol concentration on efficiency of chiral separation were investigated. Then it has been testified that the optimal buffer solution consisted of 25.0 mM Cu(Ac) 2 , 50.0 mM AAIL and 20% (v/v) methanol at pH 4.0. The interesting thing is well enantioresolution could be observed with [ l -Pro][CF 3 COO] as the new chiral ligand and nine pairs of labeled d , l -AAs were successfully separated with the resolution ranging from 0.93 to 6.72. Meanwhile, the baseline separation of labeled d , l -AAs could be achieved with the other three kinds of AAILs as ligands. The results have demonstrated the good applicability of AAILs with AAs as cations for chiral separation in CLE-CE system. In addition, comparative study was also conducted for exploring the mechanism of the AAILs as new ligands in CLE-CE.
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