SOLAR ENERGY
·
2023
·
IF 6.7
Jie Yu,Dan Zhu,Cong Qi,Wenjie Zhang
In order to collect solar energy into vapor more efficiently, Ag@Fe 3 O 4 nanoparticles with good photothermal properties were prepared in this study, and nanoparticle films were prepared by vacuum filtration of nanofluids to load nanoparticles on filter membrane, which exhibit good evaporation performance. The effects of fluid depth, nanoparticle loading surface density and light intensity on the evaporation performance were investigated. The experiments showed that the evaporation performance is the best at a light intensity of 2 sun, a surface density of 1.0 g/m 2 and a fluid depth of 30 mm (evaporation efficiency of 0.599 and heat efficiency of 0.824). In addition, the surface density is not conducive to the increase of water temperature when it exceeds a certain range. The increase of nanoparticle film surface density is mainly beneficial to evaporation rather than heat storage.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 14
·8567-8574
·
IF 3.108
Jiachun Chai,Shanhui Zhu,Youliang Cen,Jing Guo,Jianguo Wang,Weibin Fan
One-pot hydrogenolysis of cellulose to ethylene glycol (EG) was carried out on WO3-based catalysts combined with Ru/C. To probe the active catalytic site for breaking the C–C bond of cellulose, a series of WO3–ZrO2 (WZr) catalysts were synthesized and systematically characterized with XRD, Raman, UV-Vis, H2-TPR, DRIFS and XPS techniques and N2 physisorption experiment. It was found that the WO3 crystallites became more easily reduced to W5+–OH species with increasing crystallite size or tungsten surface density of the WZr catalyst owing to the decrease of their absorption edge energy (AEE) originating from weakening their interaction with ZrO2 support. This, as a result, gave higher EG yield at higher tungsten surface density. The structure–activity relationship of the WZr catalyst reveals that the active catalytic site for cleaving the C2–C3 bond of the glucose molecule is the W5+–OH species.
研究领域:
催化化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2022
·Vol. 189
·期 4
·1-9
·
IF 6.408
Ye Tai,Zhu Dongdong,Hao Liling,Yuan Min,Cao Hui,Wu Xiuxiu,Yin Fengqin,Xu Fei
Kanamycin fluorescence aptasensors were created using a series of di-block oligonucleotide modified gold nanoparticles with various lengths of poly-adenine. In the presence of kanamycin, the double strand structure of the aptamer-reporter strand complex is disrupted, and the dye-labelled reporter strand detaches from the surface of gold nanoparticles, resulting in fluorescence recovery (Ex/Em = 485/520 nm). By adjusting the number of consecutive adenines, the programable aptamer density can be implemented on the gold nanoparticle surface, and the conformation of nucleic acid changed from lying-down to up-right. The apparent binding constant, binding kinetics, and limit of detection of the prepared aptasensors were carefully examined to explore the influence of surface density. Under the optimum condition, the aptasensor had a tenfold lower limit of detection than the thiolated aptamer modified one, as low as 23.6 nM, when a di-block oligonucleotide with twenty consecutive adenines tailed. In addition, satisfactory recoveries ranging from 96.33 to 99.47% were achieved in spiked milk samples with relative standard deviation of 1.2–6.9% ( n = 3). This surface density regulation strategy holds great promise in other aptamer-based interfacial recognition and sensing. Graphical abstract
Schematic presentation of di-block oligonucleotide modified gold nanoparticle with different surface densities and its kanamycin sensing application.
研究领域:
生物化学
·
纳米生物学
·
分析化学
✓ 已验证
DOI
PubMed
高影响因子
Biomaterials Science
·
2024
·
IF 5.8
Xiaoyu Yang,Jidong Zhang,Jitang Chen,Yunxuan Xie,Tianci Hu,Qin Luo,Tianhao Peng,Han Luo,Linlin Shi,Jiangling Wan,Jianxin Wang,Xiangliang Yang,Jianyong Sheng
Oral protein drugs’ delivery faces challenges due to multiple absorption barriers for macromolecules. Co-administration with permeation enhancers and encapsulation in nano-carriers are two promising strategies to enhance their oral absorption. Herein, the poly(lactic-co-glycolic acid) nanoparticles (PLGA NPs) are decorated with polyethylene glycol (PEG) and a traditional Chinese medicine-derived permeation enhancer borneol (BO) for oral insulin delivery. Compared with a physical mixture of BO and PEG-decorated PLGA NPs, PLGA–PEG–BO NPs significantly facilitate insulin permeation across intestinal epithelia through various transcytosis pathways. The relationship among the BO surface density, physico-chemical properties and multiple barriers penetration ability is further investigated. Increasing the BO density boosts penetration through the epithelial cell layer but reduces enzyme and mucus barrier penetration. When the surface PEG density is at 90% and BO density is at 10%, the NPs possess the strongest overall ability to overcome both the mucus layer barrier and epithelial cell barrier, as illustrated by the highest permeation efficiency through Caco-2/HT29-MTX cell co-cultural monolayers. In diabetic rodents, PLGA–PEG90%–BO10% NPs exhibit high intestinal safety and a substantial hypoglycemic effect, with insulin availability at 6.22 ± 2.30%, double that of orally delivered insulin PLGA–PEG NPs and far superior to a physical mixture with BO. This study reveals the importance of tailored absorption enhancer decoration for oral protein delivery.
研究领域:
药剂学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYTICAL BIOCHEMISTRY
·
2015
·
IF 2.219
Javier Batista Perez,Deependra Tyagi,Mo Yang,Loany Calvo,Rolando Perez,Ernesto Moreno,Jinsong Zhu
Self-assembled monolayers designed to immobilize capture antibodies are usually prepared using a mixture of functional and inactive linkers. Here, using low molar ratios (1:1 to 1:100) of the two linkers resulted in loss of binding capability of the anti-EGFR (epidermal growth factor receptor) antibody nimotuzumab, as assessed by surface plasmon resonance imaging. We then developed a simple theoretical model to predict the optimal surface density of the functional linker, taking into account the antibody size and linker diameter. A high (1:1000) dilution of the functional linker yielded the best results. As an advantage, this approach does not require chemical modification of the protein.
研究领域:
生物化学
·
分子生物学
·
生物物理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
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