JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
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2024
·Vol. 149
·期 23
·14449-14461
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IF 3
Ma Qianyu,Gao Wei
Phase change materials (PCMs) exhibit a promising application as a heat storage medium in battery thermal management. However, the flammability, low thermal conductivity, and leakage problems of organic PCMs constrain the development. In this study, a novel strategy based on inorganic hydrated salt with natural nonflammability was proposed. Sodium acetate trihydrate and disodium hydrogen phosphate dodecahydrate composite materials (SAT-DSP) were synthesized without affecting the properties. The prepared SD@SiO 2 with sodium silicate as the precursor, while SAT-DSP as the core material, possessed the dual heat storage performance of phase transition and thermochemical heat storage. The SiO 2 shell with a dense surface successfully realized the encapsulation of SAT-DSP, and the combined effect of heterogeneous nucleation and mesoporous confinement effectively inhibited the phase separation of phase change materials. The optimal ratio of SD@SiO 2 was determined through a comprehensive analysis of morphology, thermal stability, and thermal storage properties. The heat storage density was up to 509.18 J g −1 with a phase transition temperature of 78.78 °C. It improved the chemical instability and leakage of hydrated salts and centralized the dehydration process of SAT-DSP to achieve rapid response. Even after continuous heating on a 120 °C heating platform for 30 min, the surface temperature of SD@SiO 2 was maintained within a safe range (< 65 °C). This inorganic phase change material exhibited considerable potential for application in battery thermal runaway protection.
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JOURNAL OF ELECTRONIC MATERIALS
·
2024
·Vol. 54
·期 1
·598-608
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IF 2.2
Deng Wenqiang,Liao Runhua,Liang Boyu,Du Jie,Zhang Wenbin,Fu Xin,Li Shuyao,Hong Yan,Fu Lichun
In this research, a BiOI/C 3 N 5 heterostructure was synthesized using a solvothermal technique to prevent the recombination of photoexcited electrons and holes. The morphology, structure, and mechanism of the material were investigated using x-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution TEM (HRTEM), x-ray photoelectron spectroscopy (XPS), ultraviolet–visible diffuse reflectance spectroscopy (UV–Vis DRS), energy-dispersive x-ray spectroscopy (EDS), electron paramagnetic resonance (EPR), and photoluminescence (PL) spectroscopy, among other tests. The photocatalytic performance of the heterostructure was evaluated through the degradation of tetracycline hydrochloride (TCH). Results showed that compared to C 3 N 5 and BiOI alone, the formation of the heterostructure significantly enhanced the photocatalytic efficiency, achieving 1.5 times the degradation efficiency of pure C 3 N 5 and twice that of BiOI. Under optimal conditions, the composite material degraded nearly 90% of TCH within 180 min, and after five cycles, it still exhibited degradation efficiency of 76.19%, demonstrating its good recyclability and stability. The main active species involved in the photocatalytic degradation of TCH were found to be superoxide radicals (•O 2 − ) and holes (h + ). This work not only provides a new approach to the design of photocatalytic degradation materials but also offers a novel method for effectively degrading organic pollutants.
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npj Science of Food
·
2024
·Vol. 8
·期 1
·1-7
·
IF 6.3
Cai Shuangfeng,Xie Ningning,Zheng Ling,Li Quan,Zhang Siyu,Huang Qinghua,Luo Wei,Wu Mei,Wang Yidan,Du Yilun,Deng Shao-ping,Cai Lei
Sweet taste receptors found in oral and extra oral tissues play important roles in the regulation of many physiological functions. Studies have shown that urine volume increases during the lifetime exposure to artificial sweeteners. However, the detailed molecular mechanism and the general effects of different artificial sweeteners exposure on urine volume remain unclear. In this study, we investigated the relationship between urinary excretion and the sweet taste receptor expression in mice after three artificial sweeteners exposure in a higher or lower concentration via animal behavioral studies, western blotting, and real-time quantitative PCR experiment in rodent model. Our results showed that high dose of acesulfame potassium and saccharin can significantly enhance the urine output and there was a positive correlation between K + and urination volume. The acesulfame potassium administration assay of T1R3 knockout mice showed that artificial sweeteners may affect the urine output directly through the sweet taste signaling pathway. The expression of T1R3 encoding gene can be up-regulated specifically in bladder but not in kidney or other organs we tested. Through our study, the sweet taste receptors, distributing in many tissues as bladder, were indicated to function in the enhanced urine output. Different effects of long-term exposure to the three artificial sweeteners were shown and acesulfame potassium increased urine output even at a very low concentration.
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npj Clean Water
·
2024
·Vol. 7
·期 1
·1-10
·
IF 10.4
Li Wanxin,Shu Dawu,An Fangfang,Liu Ruigang,Shan Juchuan,Han Bo,Cao Shaolei
Rapid activation of sodium persulfate (SPS) for the degradation of C.I. Reactive Red 218 (RR218) was achieved using Ti 3 C 2 MXene reduction of trace Fe 3+ . The degradation rate of RR218 reached 97.7% using a mixture containing 3 g L −1 of SPS, 3.35 mg L −1 of Fe 3+ and 60 mg L −1 of MXene stirred at 25 °C for 30 min. The intense reduction of Ti 3 C 2 MXene triggers the Fe 3+ /Fe 2+ cycle thereby accelerating the activation of SPS. When reactive dyes were degraded by Fe 3+ /SPS/MXene process, ·OH played a major role. The dye degradation capacity of the Fe 3+ /SPS/MXene process decreased after 5 cycles of recycling. In addition, the wastewater treated under these conditions resulted in high dyeing efficiencies in reuse experiments. This study not only improves the understanding of the catalytic reaction of MXene but also provides a wastewater treatment and reuse process with low metal consumption and high efficiency.
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CHEMISTRY OF NATURAL COMPOUNDS
·
2025
·
IF 0.9
Popov S. A.,Qi Z.,Yang G.,Wang C.,Semenova M. D.,Shpatov A. V.,Shults E. E.
New conjugates of lupane triterpenoids bound through a 1,2,3-triazole linker with gallate derivatives were prepared via Cu-catalyzed cycloaddition reactions of [3 β ,28-diacetoxy-20(29)-lupen-30-yl]azide and 3 β -acetoxylup-20(29)-en-30-azido-28-oic acid with gallate derivatives with propargyl substituents in various positions. Conjugate 4 based on betulin with a modified gallate substituent containing a dioxolane moiety possessed potent antioxidant properties and anti-inflammatory activity (suppression of NO hyperexpression).
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Biomass Conversion and Biorefinery
·
2024
·
IF 3.5
He Li-Han,Mu Bo-Zhong,Yang Shi-Zhong
Amphiphilic polyamides represent a class of surfactants with vast potential for applications. In this work, fatty acid methyl esters (methyl oleate and methyl erucate) and biomass-derived 1,4-butanediamine were utilized as raw materials to synthesize two novel anionic polyamide surfactants (APSs, C18:1-PEA and C22:1-PEA). The structure of APSs was characterized via 1 H nuclear magnetic resonance ( 1 H NMR) spectra, Fourier transform infrared (FT-IR) spectra, and gel permeation chromatography (GPC). The physico-chemical properties of APSs were explored through thermal stability, surface activity, behavior of APSs molecules in aqueous solution, and the influence of pH on their emulsion stability. The results indicated that APSs could form stable oil-in-water emulsions under alkaline conditions (pH 11 and above). In addition, stable emulsions of liquid paraffin or simulated oil formed by the C18:1-PEA surfactant can be completely destabilized in the lower pH solution in 30 min. The pH-sensitive behavior of the emulsions could be attributed to the introduction of the polyether structure, which, under alkaline conditions, imparts additional electrostatic repulsion due to hydrogen bonding interactions. This study provides an alternative idea for designing novel pH-sensitive emulsifiers, with potential applications in scenarios where emulsions need to be formed under alkaline conditions and subsequently destabilized after use. Graphical Abstract
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JOURNAL OF FLUORESCENCE
·
2024
·
IF 2.6
Dai Zhengyuan,Liu Hao,Sun Xuyuan,Wang Ying,Fan Jie,Li Li,Ding Yaping
Using o-phenylenediamine as carbon source and phytic acid as phosphorus source, two P-rich carbon quantum dots RCDs and BCDs were synthesized successfully by changing the reaction temperature and time of hydrothermal method. It was found that RCDs with red emission could realize sensitive detection of 2-methylimidazole, and 2-methylimidazole had no obvious quenching effect on BCDs with blue emission, which made RCDs a sensitive, quick and selective fluorescence sensor for 2-methylimidazole detection. Under the optimal experimental conditions, the fluorescence intensity of RCDs decreased with the increasing of 2-methylimidazole concentration. The detection of 2-methylimidazole concentration by the carbon quantum dots sensor showed a good linear relationship in the range of 5 ~ 110 µM, and the low detection limit was 0.61 µM (S/N = 3). The sensor is able to detect 2-methylimidazole in lake water, enabling the application of real samples. The results show that this work provides a simple fluorescence method to detect 2-methylimidazole in water.
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Scientific Reports
·
2024
·Vol. 14
·期 1
·1-14
·
IF 3.8
Liu Chao,Jia Xinlei,Wang Yonghui,Gu Yuxin,Liu Yanjuan,Wei Lixin,Xu Lanjuan
This paper aims to address the issue of environmental pollution resulting from marine oil spills by evaluating the oil adsorption performance of commonly used fence materials. Conventional oil adsorption materials exhibit limited rates and capacities for oil adsorption. Existing methods have proven insufficient in meeting the requirements for efficient and rapid oil–water separation. A new oil-absorbing barrier was developed by utilizing high oil adsorption resin as the primary material and hydroxypropyl methyl cellulose (HPMC) as the binder, leveraging the exceptional oil adsorption and hydrophobic properties of P(BMA-SMA-St)/MIL-101(Fe) resin. The oil-absorbing fence was characterized using scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA). The oil adsorption rates of carbon tetrachloride, toluene, diesel and gasoline by the oil adsorption fence with 25 g/L resin content were 101.26 g/m 2 , 68.12 g/m 2 , 35.19 g/m 2 , and 46.69 g/m 2 , respectively. After 120 h of UV irradiation, the coating’s oil absorption capacity remained nearly unchanged, and it demonstrated outstanding mechanical, chemical, and wear resistance. As a result, the oil adsorption fence possesses the capability to rapidly absorb oil from the water’s surface during the process of containing oil pollution, leading to positive social and economic impacts.
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RESEARCH ON CHEMICAL INTERMEDIATES
·
2024
·Vol. 50
·期 8
·3821-3841
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IF 2.8
Zhai Chenghan,Ma Zhengxiang,Wang Yanji
The preparation of caprolactam (CPL) from biomass as raw material is a very hot topic of current concern. In this paper, a new way to synthesize CPL from 5-hydroxymethylfurfural (HMF) was proposed, and the catalytic reaction of cyclization of the intermediate 6-hydroxycaproamide (6-HCM) was studied to provide a basis for the synthesis of bio-based CPL. A bimetallic catalyst, Ru–Co/TiO 2 , was prepared using the impregnation method and characterized using XRD, XPS, H 2 -TPR, and TEM. The investigation delves into the impact of various parameters, including metal loading, choice of solvent, solvent ratio, catalyst dosage, and reaction time, on the yield of the final product. The findings demonstrate a significant synergistic effect between Ru and Co in the bimetallic Ru 5 Co 6 /TiO 2 catalyst, leading to improved catalytic performance. Under the optimized reaction conditions (250 °C, 1 MPa N 2 , 1,4-dioxane: NH 3 ·H 2 O = 2:1 as the solvent ratio), the conversion rate of 6-HCM reaches 99.0%, with CPL yield of 62.2%.
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Chemical and Biological Technologies in Agriculture
·
2024
·Vol. 11
·期 1
·1-17
·
IF 5.2
Zhang Hongbao,Cai Liuti,Yuan Kai,Liu Zhongwei,Ran Maoyang,Chen Siang,Cai Wu,Rao Cheng,Cai Lin,Zhou Dong
Background As a vital soil-borne pathogenic bacterium, Ralstonia solanacearum can cause wilt disease in multiple Solanaceae plants. Several phages, such as ϕPB2, could infect R . solanacearum acting as a potential biological control agent in soil. In addition, some nanoparticles, especially copper preparation, also showed high toxicity on R. solanacearum with low toxicity on plant. However, whether they can be administered in combination and how effective they are in inhibiting the plant disease caused by R . solanacearum is known very little. Results In this work, the characterization of CuONPs using scanning electron microscope, transmission electron microscope, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, and X-ray diffraction ascertained the presence of CuONPs which were nanometer particle of 83 nm. Then it was found that combined application of CuONPs with phage (ϕPB2) was superior to that of ϕPB2 or CuONPs alone in controlling tobacco bacterial wilt, with the CuONPs (250 mg/mL) and phage (10 6 PFU/mL) ratio being the best, at 79.1%. The combination of CuONPs and ϕPB2 also showed no obvious toxicity on tobacco growth than control like single application of CuONPs or ϕPB2. Furthermore, the transcriptome changes of R . solanacearum analysis indicated that the combination application and single allocation of CuONPs could inhibit “biofilm formation”, molecular function, biological processes, cellular components, metabolic process, and so on. In addition, the combination application showed higher inhibition of motility and biofilm, and better enhancement of cell membrane permeability, protein leakage, MDA concentration, and enzyme activity of their respiratory chain dehydrogenase than single application of CuONPs or phage (ϕPB2). Transcriptomes analysis also supported that the addition of ϕPB2 enhanced the toxicity of CuONPs by influencing the ABC transporters and quorum sensing, metabolic processes, and cellular biosynthetic processes of R. solanacearum . Conclusion In total, our work not only proposed a novel way to increase the bactericidal effect of nanomaterials by adding phage, but also discovered the influence, synergistic effects, and mechanisms, which is useful to design novel way to combat phytopathogenic bacteria in the complicated environment. Graphical abstract
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Nature Communications
·
2024
·Vol. 15
·期 1
·1-9
·
IF 14.7
Guo Chenyue,Tang Huajie,Wang Pengfei,Xu Qihao,Pan Haodan,Zhao Xinyu,Fan Fan,Li Tingxian,Zhao Dongliang
Harvesting electricity from ubiquitous water vapor represents a promising route to alleviate the energy crisis. However, existing studies rarely comprehensively consider the impact of natural environmental fluctuations on electrical output. Here, we demonstrate a bilayer polymer enabling self-sustaining and highly efficient moisture-electric generation from the hydrological cycle by establishing a stable internal directed water/ion flow through thermal exchange with the ambient environment. Specifically, the radiative cooling effect of the hydrophobic top layer prevents the excessive daytime evaporation from solar absorption while accelerating nighttime moisture sorption. The introduction of LiCl into the bottom hygroscopic ionic hydrogel enhances moisture sorption capacity and facilitates ion transport, thus ensuring efficient energy conversion. A single device unit (1 cm 2 ) can continuously generate a voltage of ~0.88 V and a current of ~306 μA, delivering a maximum power density of ~51 μW cm −2 at 25 °C and 70% relative humidity (RH). The device has been demonstrated to operate steadily outdoors for continuous 6 days.
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Nature Energy
·
2024
·
IF 49.7
Xie Congxin,Wang Chao,Xu Yue,Li Tianyu,Fu Qiang,Li Xianfeng
The ever-increasing need for energy-dense batteries with high safety is fuelling global research and innovations in new redox chemistry and device design. Here we show an aqueous battery employing highly concentrated hetero-halogen electrolytes that contain I − and Br - , resulting in a multielectron transfer process of I − /IO 3 − . The intermediate bromide species IBr and Br 2 , generated during the electrochemical process, enhances the reaction kinetics and alleviates the potential gap between oxidation and reduction. When using a 6 M I − electrolyte to achieve over 30 M electron transfers, the I − /IO 3 − cathode displayed a high specific capacity of over 840 Ah l catholyte −1 . A battery with Cd/Cd 2+ as the anode demonstrated a high energy density of over 1,200 Wh l catholyte −1 . Even at an exceptionally high current density of 120 mA cm −2 , an energy efficiency of 72% was obtained. Our work demonstrates that safe aqueous batteries with high energy density are possible, offering a development option for grid-scale energy storage and even electric vehicles.
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