Nanophotonics
·
2023
·Vol. 12
·期 21
·4117-4126
·
IF 7.5
Jinhao Zang,Fuhang Jiao,Jianyong Wei,Qing Lou,Guangsong Zheng,Chenglong Shen,Yuan Deng,Ehsan Soheyli,Reza Sahraei,Xun Yang,Huaping Zang,Weimin Zhou,Wei Fan,Shaoyi Wang,Lin Dong,Chong-Xin Shan
Luminescent solar concentrators (LSCs) are attractive for the easy operation and high compatibility with building integrated photovoltaics due to their low cost, large-scale and applicability. However, underutilized sunlight in visible wavelengths often impedes the advance of LSCs. Here, we demonstrate an orange-emitting carbon nanodots-based LSC (O-CDs) with excitation concentrated in the visible wavelengths. The orange-emitting carbon nanodots (O-CDs) with highly localized excitonic emission are prepared via atomic condensation of doped pyrrolic nitrogen, delivering a high photoluminescence quantum yield of 80 % and a suitable Stokes shift with absorption spectrum situated in the visible region. The O-CDs are embedded in polyvinylpyrrolidone to obtain a highly transparent, stable and environmentally friendly O-CDs-based LSC. Thanks to efficient utilization of solar radiation in visible areas and well match between the emission of O-CDs and the response bands of photovoltaic cells, the O-CDs-based LSC reveals an optical conversion efficiency of 5.17 %, superior to that of most carbon nanodots-based LSCs. These results provide an effective strategy to develop carbon-based luminescent concentrated materials for architectural integrated photovoltaic technology.
✓ 已验证
产品关联
DOI
高影响因子
THERMOCHIMICA ACTA
·
2023
·
IF 3.5
Xiang Cao,Fengqiang Nan,Jianwei Zhang,Ling Chen,Heng Gao,Weidong He
The acid remaining in the nitrocellulose (NC) during the production process have some influence on its structure and stability. Herein, physicochemical properties, thermal behavior, and decomposition kinetics of NC before and after sulfuric acid treatment were thoroughly investigated using a series of analytical instruments in this paper. It is found that the nitrogen content and relative molecular weight of NC-0.968% that undergoing impregnation with sulfuric acid and drying is decreased by 0.58% and 16% (decreasing rate), respectively, suggesting that the presence of excess sulfuric acid leads to denitrification of NC at room temperature as well as breakage of the glucoside bond, with a greater effect on the latter. Moreover, the results of X-ray diffraction (XRD), scanning electron microscopy (SEM), and dynamic vapor sorption (DVS) indicate that the presence of sulfuric acid did not cause significant changes in the crystalline structure of NC, but severely damage the microscopic morphology, resulting in a large number of micropores appearing on its fiber surface, which enhances the hygroscopicity of NC. In addition, the combined Model-based kinetic results indicate that the decomposition reaction process of NC- 0.968% has a step one more than that of pure NC, which is attributed to the acid-catalyzed denitrification of NC and the breaking of glucoside bonds. Combined with the experimental results of TG-DSC-FITR, it shows that the presence of acid mainly affects the initial decomposition process of NC, while the fracture of the glucose ring frame and oxygen bridge in the NC molecular structure is more dependent on the action of NO 2 and the decomposition temperature .
✓ 已验证
产品关联
DOI
高影响因子
Foods
·
2023
·Vol. 12
·期 20
·3752
·
IF 5.2
Xue Qin,Jingqi Cheng,Xuehe Qi,Ning Guan,Qing Chen,Xiaoyan Pei,Yujun Jiang,Xinyan Yang,Chaoxin Man
Ultra-high temperature sterilized milk (UHT) is a popular dairy product known for its long shelf life and convenience. However, protein gel aging and fat quality defects like creaming and flavor deterioration may arise during storage. These problems are primarily caused by thermostable enzymes produced by psychrotrophic bacteria. In this study, four representative psychrotrophic bacteria strains which can produce thermostable enzymes were selected to contaminate UHT milk artificially. After 11, 11, 13, and 17 weeks of storage, the milk samples, which were contaminated withPseudomonas fluorescens,Chryseobacterium carnipullorum,Lactococcus raffinolactisandAcinetobacter guillouiae, respectively, demonstrated notable whey separation. The investigation included analyzing the protein and fat content in the upper and bottom layers of the milk, as well as examining the particle size, Zeta potential, and pH in four sample groups, indicating that the stability of UHT milk decreases over time. Moreover, the spoiled milk samples exhibited a bitter taste, with the dominant odor being attributed to ketones and acids. The metabolomics analysis revealed that three key metabolic pathways, namely ABC transporters, butanoate metabolism, and alanine, aspartate, and glutamate metabolism, were found to be involved in the production of thermostable enzymes by psychrotrophic bacteria. These enzymes greatly impact the taste and nutrient content of UHT milk. This finding provides a theoretical basis for further investigation into the mechanism of spoilage.Keywords:psychrotrophic bacteria;UHT milk;thermostable enzymes;quality
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL PAPERS
·
2023
·
IF 2.2
Zhang Lie-yuan,Liu Jie-guang,Han Ying,Zhang Shu-min,Jiang Long-fa,Zhan Chun-rui,Zeng Chen-hui,Wang Wen-jun
An automatic potentiometric setting dynamic pH titration method for the determination of sodium bicarbonate in compositions of smoke-type fireworks was developed. After wetting the sample with 0.1 mL ethanol, added 60 mL of deionized water for dissolution, ultrasound for 10 min, filtered and removed the insoluble matter, and then used a potentiometric titrator to drop 0.1 mol/L of hydrochloric acid. The experimental results showed that the limit of quantitation was 0.1%, the recoveries were 96.1–104.8% and the relative standard deviation was 0.56–3.11% when the sample weigh 0.2 g. The automatic potentiometric setting dynamic pH titration method is simple to operate and can accurately and quickly determine the content of sodium bicarbonate in compositions of smoke-type fireworks.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Keke Li,Sen Li,Wule Zhang,Zhifeng Shi,Di Wu,Xu Chen,Pei Lin,Yongtao Tian,Xinjian Li
Photocatalytic applications of halide perovskites have attracted increasing attention. However, lack of stability and lead toxicity of lead halide perovskites have hindered their applications. Metal halide double perovskite (DP) Cs 2 AgInCl 6 is a stable, environment-friendly semiconductor with direct band gap, and then the best promising alternative to lead halide perovskites. Here, the applications of Cs 2 AgInCl 6 DP to photocatalytic degradation of organic pollutants have been developed, in which the octahedral Cs 2 AgInCl 6 DP particles (~3.33 eV) were prepared by precipitation from acid solutions. The as-prepared samples exhibit high photocatalytic activity, which can degrade about 98.5% of water-insoluble carcinogen Sudan Red III in only 16 min, and have a good stability for 5 cycle operations. Furthermore, the Cs 2 AgInCl 6 DP also can degrade Rhodamine B, Methyl orange and Methyl red efficiently, demonstrating a highly-efficient and stable ethanol solvent-based photocatalytic system for organic pollutants degradation. The high photocatalytic activity could be attributed to direct band gap and long carrier lifetime of Cs 2 AgInCl 6 DP. These unique features of Cs 2 AgInCl 6 DP indicate that it could have a good application prospect for photocatalytic degradation of organic pollutants.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ULTRASONICS SONOCHEMISTRY
·
2021
·
IF 7.491
Okon Johnson Esua,Jun-Hu Cheng,Da-Wen Sun
A novel method of thermoultrasound-assisted plasma functionalized buffer (PFB) for decontaminating grass carp was evaluated using the Box–Behnken design (BBD) with processing variables including PFB generating voltage (P V ), ultrasound treatment time (U T ) and temperature (T P ). The predicted models were found to be significant ( p < 0.05) and displayed sufficient fitness with experimental data as indicated by non-significant ( p > 0.05) lack of fit and high coefficient of determination (R 2 ≥ 0.97) values. The optimum decontamination conditions for the responses of S. putrefaciens and S. Typhimurium were P V of 66 V, U T of 14.90 min and T P of 60 ℃, achieving reductions of 4.40 and 3.97 log CFU/g, respectively, with a desirability of 0.998. Among the variables, temperature presented higher significance for inactivating bacteria and the production of volatile basic nitrogen and lipid peroxidation under the optimized conditions were within the limits of freshness for grass carp. Additionally, the effects of PFB and the optimized thermoultrasound-assisted PFB decontamination were mild on the microstructure of grass carp with slight ruptures and loose myofibril structures, indicating the potential of thermoultrasound-assisted PFB for seafood products decontamination with reduced processing time.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CARBOHYDRATE POLYMERS
·
2020
·
IF 7.182
Peng Lu,Yang Yang,Ren Liu,Xin Liu,Jinxia Ma,Min Wu,Shuangfei Wang
A sugarcane bagasse nanocellulose-based hydrogel was developed as a colourimetric freshness indicator for monitoring spoilage of chicken breast. Nanocellulose was prepared from sugarcane bagasse cellulose filaments by TEMPO-mediated oxidation, and then used to form a strong self-standing hydrogel matrix through Zn 2+ cross-linking. The hydrogel worked as a carrier for pH-responsive dyes (bromothymol blue/methyl red), which changed colour according to the freshness of the chicken sample. CO 2 levels were found to increase with the spoilage of chicken, relative to rising levels of micro-organisms. The indicator hydrogel optical colour changed from green to red on the third day, as the log CFU/g passed the limit of acceptability for human consumption and emission of complicated volatiles. This new design of colourimetric freshness indicator made with a nanocellulose hydrogel has a quick response to chicken spoilage and is expected to facilitate the utilisation of bagasse nanocellulose as a value-added material in intelligent packaging.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2020
·
IF 7.1
Xiuying Liu,Yu Wang,Lijie Zhu,Yiwei Tang,Xue Gao,Lijun Tang,Xuepeng Li,Jianrong Li
A novel colorimetric and fluorescent dual-mode sensing label for the highly sensitive detection of fish freshness was developed based on the stimuli-responsive polymer polyaniline (PANI) and the aggregation-induced emission property of tetraphenylethylene (TPE). TPE was integrated into the PNAI matrix on the surface of a polyamide film and placed in the sample package. During fish spoilage trials, the PANI/TPE sensing label exhibited not only visible color changes from emerald green to peacock blue but, more importantly, a fluorescent signal that changed from black to bright blue under ultraviolet (UV) light. The color difference of the sensing label in terms of ΔE values reflected a linear response to the total volatile basic nitrogen (TVB-N) concentration within 25.2 mg/100 g (UV light, R 2 = 0.976, y = 3.4773x-18.281; natural light, R 2 = 0.961, y = 1.373x - 7.2152) at room temperature and within 29.63 mg/100 g (UV light, R 2 = 0.994, y = 1.7894x + 44.188; natural light, R 2 = 0.984, y = 0.5187x + 13.192) at chilled temperature. These results indicate that consumers can judge fish freshness with the naked eye. Moreover, fish producers can extract ΔE data from sensing label photos and calculate TVB-N to quantitatively assess the freshness of fish.
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2021
·
IF 4.821
Zeming Huang,Jiehao Lei,Hong Ruan,Yongyang Gong,Guan Wang,Li Zhou
Sulfur quantum dots (SQDs), the rising star in fluorescent nanomaterials, have captured increasing attention due to their unique attributes. However, the development of SQDs with targeted fluorescence response to analyte is still a challenge. Herein, we report a robust fluorescent SQDs material that possess both molecular recognition and fluorescence detection capability by employing hydroxypropyl-β-cyclodextrin (HP-β-CD) as ligand. The prepared SQDs simultaneously display fine aqueous dispersibility, stable and tunable fluorescence, and favorable biocompatibility, which enable them promising for applications in cellular imaging and sensing. Owing to the synergistic effect of inner filter effect (IFE) and host-guest interaction, the SQDs can be utilized as an effective fluorescent probe for tartrazine (TTZ) detection with excellent sensitivity and selectivity. The limit of detection can reach 82 nM with a wide linear range of 0–30 μM. Furthermore, the fluorescent SQDs were successfully utilized to detect TTZ in river water and food samples with satisfactory performance.
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2020
·
IF 3.99
Wenbo Liu,Chuanbin Fan,Ziao Zong,Nana Li,Kaixuan Ma,Bin Zhu,Xia Zhang,Yuhua Fan
Two novel Co(Ⅱ)-MOFs synthesized under solvothermal conditions, namely [Co 3 (L) 2 (bimb) 2 (H2O) 2 ] n ( OUC-1 ) and [Co 2 (L)(OH)(H 2 O) 2 ] n ( OUC-2 ) (bimb = 1,4-bis(lmidazol)butane, H 3 L = 3-(3,5-dicarboxylphenoxy)-5-carboxylpyridine), were used to remove Congo Red and Orange Ⅳ from aqueous environment, respectively. The influential parameters of the temperature and pH of solution, initial dye concentration, the structure and charge of dye on the adsorption performance were investigated. It is found that the dye with proper structure (i.e. organic groups favorable for adsorption, such as -NH 2 , -SO 3 H, etc, proper distance between the groups, linear structure and more benzene rings), richer negative charges, smaller molecular weight facilitates faster adsorbed. The intermittent operation experiments were adopted to make the adsorption isotherm and kinetics data of OUC-1 and OUC-2 accurately described by Langmuir isotherm and pseudo second-order kinetics. The intra-particle diffusion model indicates the adsorption process is controlled by the intra-particle diffusion and other adsorption stages. Two adsorbents release azo dyes easily through simple organic solutions and maintain high adsorption capacity after 8 cycles. Moreover, OUC-1 and OUC-2 also exhibit high adsorption performance in artificial seawater. The mechanism of selective adsorption involves pore filling, π-π stacking interaction, hydrogen bond and electrostatic interaction.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Ocean University of China
·
2019
·Vol. 19
·期 2
·439-445
·
IF 0.699
Zhang Meijian,Ma Yurong,Che Xinyi,Huang Zumei,Chen Peng,Xia Guanghua,Zhao Meihui
This study investigated the difference of nutrient composition in Caulerpa lentillifera collected from different regions. The nutrient compositions of C. lentillifera from China’s Hainan and Shandong provinces were determined and compared with those from Semporna (Malaysia), Sabah (Malaysia), Petchburi (Thailand), and two other species of seaweeds (Malaysia). The results showed that the polysaccharide and protein contents of C. lentillifera from Hainan (44.82%±0.98% and 12.5% ±0.70%), Shandong (43.22% ±1.42% and 14.7% ±0.72%), Petchburi (59.27%±2.31% and 12.49%±0.30%), and Sabah (44.02%±2.01% and 19.38%± 1.48%) were higher than those of Eucheuma cottonii (26.49%±3.01% and 9.76%±1.33%) and Sargassum polycystum (33.49%± 1.70% and 5.40% ± 0.07%), respectively. The polyunsaturated fatty acid contents in C. lentillifera from Hainan (29.98%) and Shandong (22.11%) were higher than that in Semporna (16.76% ± 0.27%), Sabah (9.49%), and S. polycystum (20.34% ±0.43%), but lower than that in E. cottonii (51.55% ± 0.57%). In Caulerpa lentillifera of Hainan and Shandong provinces, the essential amino acid (EAA)/total amino acid (TAA) ratios were 35.22% and 38.78%, respectively; and the EAA/ETAA ratios were 54.36% and 63.35%, respectively. The EAA composition of C. lentillifera was close to the ideal model of Food and Agriculture Organization/World Health Organization. C. lentillifera was rich in mineral elements, including calcium ((3315.85 ±127.55) mg (100 g) −1 and (3728.35 ±92.38) mg (100 g) −1 ), magnesium ((6715.74 ± 82.58) mg (100 g) −1 and (8128.59 ± 242.72) mg (100 g) −1 ), and trace elements, including iron ((510.65 ±5.47) mg (100 g) −1 and (1972.97 ±183.35) mg (100 g) −1 ), selenium ((1.04 ±0.08) mg (100 g) −1 and (0.83 ±0.15) mg (100 g) −1 ), and zinc ((33.90 ±0.13) mg (100 g) −1 and (11.75 ±2.05) mg (100 g) −1 ). These results showed that C. lentillifera was more nutritious than S. polycystum or E. cottonii in terms of polysaccharide, protein, and fatty acid contents. Furthermore, both C. lentillifera species collected from Hainan and Shandong provinces show more basic nutrients. Therefore, C. lentillifera has important development and application prospects.
✓ 已验证
产品关联
DOI
高影响因子
SOLID STATE SCIENCES
·
2019
·
IF 2.155
Jinyi Zhang,Jing Zuo,Yinshan Jiang,Dandan Zhu,Jiupeng Zhang,Cundi Wei
Coal gasification slag is abundant of unburned carbon and inorganic matters such as silica , alumina and calcium oxide. The mesoporous structure of coal gasification slag can be produced by acid leaching of metal ions. Therefore, it is very important to study the acid leaching process of coal gasification slag. At the same time, in order to broaden the application fields of coal gasification slag, the thermal stability of the as-prepared pore structure should meet the requirements of various occasions. Using coal gasification coarse slag (CS) and coal gasification fine slag (FS) as raw materials, this study investigated the kinetic characteristics of mesoporous formation and optimized the acid leaching conditions. The results of BET, BJH, SEM, XPS and chemical tests showed that under the condition of acid-ash ratio (molar ratio) of 1.0, liquid-solid ratio (volume/mass) of 4:1 and acid leaching temperature of 90 °C, the formation of mesoporous structure by acid leaching was a process of first-order kinetic reaction. According to the analysis of XRD , it was found that the thermal stability of both CS and FS had been greatly improved after acid leaching because of the siliceous enrichment.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）