Materials
·
2021
·Vol. 14
·期 21
·6716
·
IF 3.623
Shiyu Ma,Yan Lu,Bo Wang,Jinkai Li
White LEDs were encapsulated using Cs4PbBr6quantum dots and Gd2O3:Eu red phosphor as lamp powder. Under the excitation of a GaN chip, the color coordinates of the W-LED were (0.33, 0.34), and the color temperature was 5752 K, which is close to the color coordinate and color temperature range of standard sunlight. The electric current stability was excellent with an increase in the electric current, voltage, and luminescence intensity of the quantum dots and phosphors by more than 10 times. However, the stability of the quantum dots was slightly insufficient over long working periods. The photocatalytic devices were constructed using TiO2, CsPbBr3, and NiO as an electron transport layer, light absorption layer, and catalyst, respectively. The Cs–Pb–Br-based perovskite quantum dot photocatalytic devices were constructed using a two-step spin coating method, one-step spin coating method, and full PLD technology. In order to improve the water stability of the device, a hydrophobic carbon paste and carbon film were selected as the hole transport layer. The TiO2layer and perovskite layer with different thicknesses and film forming qualities were obtained by changing the spin coating speed. The influence of the spin coating speed on the device’s performance was explored through SEM and a J–V curve to find the best spin coating process. The device constructed by the two-step spin coating method had a higher current density but no obvious increase in the current density under light, while the other two methods could obtain a more obvious light response, but the current density was very low.
研究领域:
材料科学
·
光电
·
光催化
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DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2020
·
IF 7.632
Heng Ban,Youdi Zhang,Shuaibo Chen,Youwei Cheng,Teng Pan,Lijun Wang,Xi Li
In this contribution, readily available 5-methyl furfural (MF) derived from biomass was used as an excellent substitute of the chemically unstable 5-hydroxymethylfurfural (HMF) for preparing the commercial precursor 2,5-furandicarboxylic acid (FDCA). MF was catalytically oxidized by air into FDCA in acetic acid over homogeneous Co/Mn/Br catalysts at 130–170 °C. It was found that both the substitute reactivity and the ring chemical stability have a remarkable impact on the yield of aromatic dicarboxylic acids. The effects of reaction temperature, pressure, catalyst composition and concentration, water concentration in the solvent, and substrate/solvent mass ratio on both the main reaction and the side reaction were investigated systematically and thoroughly using HPLC and an online tail gas monitoring system. Under optimized conditions, the oxidation of MF gave 100% conversion of MF and 75.8% yield of FDCA with 99.6% purity. It was also proven that the addition of 200 ppm cerium could work well at low temperatures (130–140 °C) for enhancing FDCA selectivity via suppressing the side reactions.
研究领域:
化学工程
·
催化
·
有机化学
·
绿色化学
·
材料科学
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Daqin Chen,Gaoliang Fang,Xiao Chen
Tunability of emitting colors of perovskite quantum dots (PQDs) was generally realized via composition/size modulation. Due to their bandgap absorption and ionic crystal features, the mixing of multiple PQDs inevitably suffers from reabsorption and anion-exchange effects. Herein, we address these issues with high-content Mn2+-doped CsPbCl3 PQDs that can yield blue-excitable orange Mn2+ emission benefited from exciton-to-Mn energy transfer and Cl-to-Br anion exchange. Silica-coating was applied to improve air stability of PQDs, suppress the loss of Mn2+, and avoid anion-exchange between different PQDs. As a direct benefit of intense multicolor emissions from Mn2+-doped PQD@SiO2 solid phosphors, a prototype white light-emitting diode with excellent optical performance and superior light stability was constructed using green CsPbBr3@SiO2 and orange Mn: CsPb(Cl/Br)3@SiO2 composites as color converters, verifying their potential applications in the field of optoelectronics.
研究领域:
材料科学
·
光电技术
·
纳米技术
·
光子学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Qian Qu,Yan Hu,Jiahao Xiong,Yu Ding,Yuqi Tang,Lingrui Chen,Yajun Zhao,Yuanzhu Mi
Stabilized water-in-oil emulsions present significant challenges for oil production. However, current demulsifiers often face limitations such as high demulsification temperatures, low efficiencies, and complex synthesis processes, making the resolution of this challenge a demanding task. In this study, we successfully synthesized two ionic liquid demulsifiers, PEDA-Br and GEDA-Br, employing a straightforward two-step procedure. The objective was to enable effective treatment of water-in-oil emulsions at low temperatures with high efficiency. The structure of the demulsifiers was characterized utilizing Fourier-transform infrared spectroscopy (FT-IR) and nuclear magnetic resonance hydrogen spectra ( 1 H NMR). Bottle tests were then conducted to evaluate their demulsification efficiency (DE) in water-in-oil (W/O) emulsions. The results demonstrated that GEDA-Br achieved a DE of 98.92 % at a concentration of 500 mg/L and a temperature of 50 °C after 2 h. Additionally, both PEDA-Br and GEDA-Br exhibited DE values exceeding 95 % at a salinity level of 10,000 mg/L, and both proved effective across a broad pH range of 4 to 12. These findings highlight their robust resistance to high salinity and both acidic and alkaline conditions. The study also examined the demulsification mechanism in terms of interfacial tension (IFT), elastic modulus of the interfacial film, three-phase contact angle (TCA), and microscopic observations. The excellent interfacial activity, ability to reduce interfacial tension, and electrostatic neutralization capability are responsible for its outstanding demulsification performance.
研究领域:
化学工程
·
石油工程
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产品关联
DOI
高影响因子
Biomedical Reports
·
2024
·Vol. 21
·期 2
·1-8
·
IF 2.3
Naoki Nanashima,Kayo Horie,Indrawati Oey
Osteoporosis risk increases in menopausal individuals owing to the decrease in estrogen secretion. Blackcurrant extract (BCE) ameliorates osteoporosis; however, the underlying mechanisms are unclear. Furthermore, although BCE has phytoestrogenic activity, its effects on osteoblasts are unknown. In the present study, we investigated BCE‑mediated attenuation of osteoporosis using mouse MC3T3‑E1 pre‑osteoblasts, with a focus on osteogenesis. After treating MC3T3‑E1 cells with BCE for 48 h, cell proliferation was assessed using Cell Counting Kit‑8. Levels of osteoblast differentiation markers, namely alkaline phosphatase activity and total collagen content in the cells, were evaluated after 3 and 14 days of BCE treatment, respectively. The expression of genes encoding osteoblast differentiation markers, including collagen type I (Col‑I), alkaline phosphatase (Alp), bone γ‑carboxyglutamate protein (Bglap), and runt‑related transcription factor 2 (Runx2), was evaluated using reverse transcription‑quantitative polymerase chain reaction. Mineralization of the cells was evaluated using Alizarin Red staining. Femoral tissues of ovariectomized (OVX) rats with or without 3% BCE were stained using ALP to evaluate osteogenic differentiation in femoral tissue. After treating MC3T3‑E1 cells with BCE, cell proliferation had increased. BCE treatment increased Alp activity and total collagen content. Moreover, the expression of Col‑I, Alp, Bglap, and Runx2 increased in BCE‑treated cells. Furthermore, when MC3T3‑E1 cells were treated with BCE for 21 days, the levels of calcified nodules increased. Alp staining intensity was stronger in the epiphyses on femoral tissue of OVX rats treated with 3% BCE than in those of untreated OVX rats. The results suggest that BCE may promote osteogenesis by inducing osteoblast differentiation.
✓ 已验证
DOI
PubMed
高影响因子
Biomedical Reports
·
2025
·Vol. 23
·期 3
·1-10
·
IF 1.9
Yue Zhou,Yi-Ran Yao,Yan Xu,Xin Rong,Yue-Feng Qiu,Ting-Yue Qi
The present study developed a novel injectable, biocompatible, and thermosensitive hydrogel system for ultrasound‑triggered drug release, using a chitosan/sodium β‑glycerophosphate/titanium dioxide nanoparticle (CS/β‑GP/TiO2 NP) composite. The inclusion of TiO2 NPs aimed to enhance ultrasound sensitivity, enabling precise therapeutic release to targeted tissues. The hydrogels displayed excellent injectability (maximum injection force <6.5 N) and gelled effectively at body temperature. Biocompatibility was confirmed through Cell Counting Kit‑8, LIVE/DEAD, and western blot assays. The present study demonstrated that hydrogels with TiO2 NPs significantly increased the release rates of sodium fluorescein and bovine serum albumin, affirming the role of TiO2 NPs as a sensitizer. This establishes the CS/β‑GP/TiO2 NP hydrogel as a promising system for ultrasound‑responsive drug delivery. Potential applications include drug delivery, tissue engineering, and wound healing, with the system offering controlled and targeted therapy under ultrasound stimulation. Future research will optimize hydrogel properties, assess in vivo performance, and evaluate long‑term stability and effectiveness in clinical settings.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Biomedical Reports
·
2025
·Vol. 22
·期 4
·1-9
·
IF 1.9
Juan Lang,Zhongkui Xiong
Parkinson's disease (PD) is the second most common neurodegenerative disease after Alzheimer's disease. Currently, no radical treatment is available for this disease. Harpagoside is a proposed neuroprotective iridoid active ingredient that can be derived from Scrophulariae buergeriana, Scrophularia striata and Harpagophytum procumbens. The present study aimed to investigate the effects of harpagoside on mitochondrial functions in rotenone‑induced cell models of Parkinson's disease (PD). Neuro‑2A (N2A) cells were treated with rotenone to establish in vitro cell models of PD. Cell viability and survival were measured using a Cell Counting Kit‑8 assay. Biochemical assays with spectrophotometry were used to measure complex I activity, mitochondrial swelling and caspase 3 activity. The cell survival rate was first found to be significantly decreased by rotenone (20 nmol/l) treatment. However, intervention with harpagoside (10 µmol/l) was found to increase the cell survival rate of rotenone‑induced N2A cell models differentiated with 1 mmol/l of dibutyryl‑cAMP. At ≥0.1 µmol/l concentration, harpagoside significantly alleviated rotenone‑induced mitochondrial swelling, whereas at 1 µmol/l it significantly counteracted the inhibitory effects of rotenone on complex I activity. At 10 µmol/l harpagoside significantly inhibited rotenone‑induced caspase 3 activation. These results suggest that harpagoside has the potential to protect mitochondrial functions against rotenone‑induced injury in N2A cell models of PD.
研究领域:
神经科学
·
药理学
·
细胞生物学
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产品关联
DOI
PubMed
高影响因子
Biomedical Reports
·
2016
·Vol. 6
·期 1
·57-62
·
IF 0
Xiaoyang Yang,Mengjie Wan,Ting Liang,Minyuan Peng,Fangping Chen
Platelet-derived polyphosphate has previously been indicated to induce coagulation. However, industrially synthesized polyphosphate has been found to have different effects from those of the platelet-derived form. The present study investigated whether synthetic sodium polyphosphate inhibits coagulation using routine coagulation tests and thromboelastography. Synthetic polyphosphate was found to inhibit adenosine diphosphate-, epinephrine-, arachidonic acid-, ristocetin-, thrombin-, oxytocin- and pituitrin-induced platelet aggregation. The effects of synthetic polyphosphate in clotting inhibition were revealed by the analysis of clotting factor activity and platelet aggregation tests. Synthetic polyphosphate may inhibit platelet aggregation by reducing platelet calcium levels, as indicated by the results of flow cytometric analysis and high-throughput fluorescent screening. Furthermore, analysis of thromboxane (TX)B2 by ELISA indicated that synthetic polyphosphate reduces platelet aggregation by inhibiting the TXA2 signaling pathway. In conclusion, synthetic polyphosphate inhibits clotting factor activity and endogenous coagulation by reducing the levels of calcium ions and TXA2 to curb platelet aggregation.
研究领域:
血液学
·
药理学
✓ 已验证
DOI
PubMed
Biomedical Reports
·
2026
·Vol. 24
·期 6
·1-13
·
IF 2.5
Zhen Wang,Jinghua Ning,Hongyuan Zhang,Qingfen Ruan,Yanhong Zhao,Run Qu,Congcong Lv,Yutong Wu,Weidong Liu,Xiaoyin Yang,Ziming Li,Yi Liang,Yuzhe Zhang
Explores a wide range of biological and medical fields, including pharmacology, genetics, microbiology, neuroscience, and molecular cardiology.
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DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Li Zhang,Xinxin Li,Ye Tian,Bin Hao,Jiufang Han,Hong Chen,Bingsuo Zou,Chunhua Du
Inorganic perovskites have received much attention due to their stability and high performance in luminescence, photoelectric conversion, and photodetection. However, perovskite optoelectronic devices prepared by the solution technique are still suffering from time-consuming and complex operations. In this paper, a single-crystal perovskite-based photodetector (PD) is prepared by very fast one-step deposition of synthesizing microplatelets (MPs) on the electrode directly. The saturated precursor is carefully optimized by adding appropriate antisolvent chlorobenzene (CB) to fabricate the MPs with their PL wavelength ranging from 418 to 600 nm. Furthermore, the PDs with a low dark current on order of nanoangstroms, high responsivity and detectivity of up to 10.7 A W–1 and 1012 Jones, respectively, and an ultrafast response rate featured by 278/287 μs (rise/decay time) are achieved. These all-inorganic perovskite PDs with a simple fabricating process and tunable detection wavelength meet the evolution tendency of PDs toward low cost and high performance, which is a high-profile strategy to realize high-performance perovskite PDs.
研究领域:
材料科学
·
光电子学
·
半导体物理
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR RECOGNITION
·
2020
·Vol. 33
·期 8
·e2844
·
IF 2.214
Lu Wang,Yanhong Wang,Binbin Zhou,Ming Zhong
A novel type of magnetic molecularly imprinted polymers (MMIP) as the solid-phase extraction sorbent was prepared, which can extract effectively the allocryptopine from the waster of Macleaya cordata (Willd) R . Br . In this study, MMIP was synthesized by using Fe 3 O 4 @SiO 2 , 4-vinyl-pyridine, ethylene glycol dimethacrylate, and allocryptopine, and these ingredients worked as magnetic core, functional monomer, cross-linker, and template, respectively. Concluded by the calculation of Gaussian 09 software, different ratio models of 4-vinyl-pyridine and allocryptopine were simulated, and the optimal ratio was 1:5 and the energy was −2205.34 kJ/mol. Transmission electron microscopy, vibration sample magnetometry, X-ray diffraction, Fourier transform infrared spectroscopy, and thermogravimetric analysis were used to determine the morphology and structure of MMIP. Furthermore, the results of adsorption experiments indicated that MMIP had high selectivity, excellent recyclability, and good adsorption performance (9.86 mg/g, 298 K). The adsorption process was consistent with the Langmuir adsorption isotherm ( R 2 > 0.98, 298 K) and pseudo-second-order kinetics model ( R 2 > 0.99, 298 K). After six times adsorption-desorption experiments, the adsorption amount of MMIP only reduced to 8.5%. In the experiments of selective adsorption, MMIP has better adsorption properties for allocryptopine (ALL, C 21 H 23 NO 5 ) than those having the same functional group. The limit of detection (LOD) was 0.4 μg/mL. The relative standard deviation ranged from 0.09% to 0.72%. The recovery of allocryptopine in samples ranged from 93.60% to 106.19%. In addition, the synthesized complex had a certain adsorption effect on allocryptopine separating from the wastewater of Macleaya cordata (Willd) R . Br .
研究领域:
环境科学
·
分析化学
·
材料科学
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 10
·4667-4673
·
IF 3.3
Yufei Lei,Yujie Li,Chen Liu,Liqiong He,Qian Li,Lifu Liao,Xilin Xiao
A convenient and portable smartphone-assisted method for the colorimetric detection of uranyl ions (UO22+) in aqueous solutions is proposed using rifampicin and 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol (Br-PADAP) as chromogenic agents. The addition of UO22+ would cause reaction with chromogenic agents to form complexes, changing the colour from orange to dark red in the rifampicin system and from yellow to light pink in the Br-PADAP system. To achieve the on-site estimation of the trace UO22+ concentration range, digital images of colour changes captured by the smartphone under fixed lighting conditions were imported into the built-in application named “Detect” to obtain HSV (hue, saturation, and value) and HSL (hue, saturation, lightness) information, which could be associated with the concentration of uranyl ions. For more precise laboratory-level detection, ultraviolet-visible (UV-vis) spectroscopy was employed as well. The absorbance of the rifampicin system exhibited strong linearity with the UO22+ concentration in the range from 4 to 50 μM at 375 nm with a method detection limit (MDL) of 3.17 μM by the UV-vis-based method, while that of Br-PADAP system had a linear relationship with the concentration from 0.9 to 7 μM at 562 nm with an MDL of 0.89 μM. The two strategies may be combined to detect UO22+ across a larger concentration range, and this method has been successfully used to analyze real samples including soil around uranium mines.
研究领域:
分析化学
·
环境科学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）