MATERIALS LETTERS
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2021
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IF 3.423
Daixiong Zhang,Qing Xiang
As one of most studied MOFs , extensive efforts have been devoted on the novel strategy for tailoring the size of zeolitic imidazolate framework (ZIF-8). We report here a facile and general method that enables the size-controllable engineering of zeolitic imidazolate framework (ZIF-8) by changing the addition order of Zn(NO 3 ) 2 ·6H 2 O (A) and 2-methylimidazole (B), which is very different from the all reported methods. Significant size difference for ZIF-8 s was observed between adding A-methanol solution to B-methanol solution and adding B-methanol solution to A-methanol solution under room temperature magnetic stirring. The influence of addition order on the crystal size was also applicable for preparing ZIF-8 encapsulating metal precursor (M-ZIF-8). We believe that this work not only pave a new way for efficient and general size-controllable design of ZIF-8 and M-ZIF-8, but can be also bridged with other size engineering methods (such as solvothermal method).
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION SCIENCE AND TECHNOLOGY
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2025
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IF 2.3
Yaxin Ren,Zhijun Zhang
An effective collector is crucial for enhancing coal flotation efficiency. The effect of a mixed collector based on petrochemical by-products on coal flotation was investigated. The investigation included various addition orders and was conducted using flotation tests, particle size distribution analysis, GC-MS, FTIR and contact angle measurements. The Mixed addition order exhibited superior performance in flotation compared to the K+Y and Y+K orders at all tested dosages. Particle size distribution analyses revealed that the mixed collector offered better dispersion in water than individual the Y-oil and K-oil, with droplet sizes below 100 µm. FTIR and contact angle measurements indicated that coal treated with the Mixed addition order demonstrated optimal reagent adsorption and the highest level of surface hydrophobicity. Aromatic compounds in the collector interacted with the hydrophobic areas of the coal surface, while partially covering some of the hydrophilic regions between these hydrophobic sites. Conversely, heteropolar components engaged with the hydrophilic regions on the coal surface to enhance adsorption. Despite these improvements, some hydrophilic sites remained after treatments with the Y+K and K+Y orders, which continued to affect the coal flotation properties.
研究领域:
矿物加工工程
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
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2016
·Vol. 6
·期 74
·70271-70276
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IF 3.289
Ying Huang,Zhaohui Wang,Changling Fang,Wenqian Liu,Xiaoyi Lou,Jianshe Liu
Addition order of reagents in the Acid Orange 7 (AO7) degradation process was investigated by varying the concentration of Fe(II), the Fe(II)/peroxymonosulfate (PMS) molar ratio and stepwise addition of Fe(II) and PMS. The importance of addition order of reagents was confirmed and an order of Fe(II)–PMS to improve the oxidation efficiency was recommended.
研究领域:
环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
LWT-FOOD SCIENCE AND TECHNOLOGY
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2023
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IF 6
Xiaolan Shang,Jie Qiao,Shimin Chang,Kexin Li
In this study, soybean protein isolate (SPI) and cellulose nanofibers (CNF) were used to prepare an oil-in-water emulsion. The effect of the sequence of adding SPI and CNF on the properties of the emulsion was examined by analyzing the emulsion index, microstructure, droplet size, zeta potential, rheological behavior, and in vitro gastrointestinal digestion characteristics of the emulsion. By using both SPI and CNF as emulsifiers, a better emulsification effect was obtained than using SPI or CNF alone. The particle size of the emulsion with SPI added first and CNF added later was smaller than that of the emulsion with CNF added first and SPI added later. And the emulsions with SPI added first had more cellulose nanofibers in the aqueous phase system. The emulsion with CNF added first and SPI added later was more likely to form a three-dimensional network structure; thus, it is more conducive to reducing the release of free fatty acids. When 50 mmol/L NaCl was added to the emulsion, the emulsion droplets gathered, and the viscosity increased, which was conducive to the formation of three-dimensional network gel structure of emulsion, but at the same time, the ability to release free fatty acids was improved.
研究领域:
食品科学
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生物化学
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DOI
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
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2022
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IF 8.91
Yinlong Xiao,Wei Tang,Willie J.G.M. Peijnenburg,Xiaohong Zhang,Jun Wu,Min Xu,Hong Xiao,Yan He,Ling Luo,Gang Yang,Chao Chen,Lihua Tu
Nanoparticles (NPs), heavy metals and natural organic matter may co-exist in the water bodies. Currently, knowledge on their interaction effects on the behaviors and fates of NPs and heavy metal ions is rather limited, which is critical to comprehensively understand their environmental risk. In this study, the aggregation, solubility and Cd-adsorption of CuO NPs co-existing with humic acid (HA) and Cd 2+ upon different solution pH and contact sequences were determined. In the ternary systems of CuO NPs, HA and Cd 2+ , pH was more important than the contact sequence of the components in affecting the NP aggregation, while the contact sequence was a predominant factor in determining the NP solubility. Pre-equilibration of CuO NPs and HA before addition of Cd 2+ resulted in the highest solubility and lowest aggregation of the NPs, relative to other sequences of addition of the components. The adsorption capacity of CuO NPs for Cd-ions increased with an increasing pH value from 5 to 9. HA significantly enhanced the Cd-adsorption capacity of CuO NPs at pH 7 and 9, while at pH 5 a non-significant effect was observed. The results are helpful to better estimate the behaviors and fates of CuO NPs and Cd 2+ when they coexisting in natural waters.
研究领域:
环境科学
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纳米技术
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水质
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Food Bioscience
·
2024
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IF 4.8
Zenghong Xing,Wenxin Han,Taotao Dai,Deming Gong,Guowen Zhang
In this study, the potato protein (PP)-pectin (PC) nanoparticles were constructed to encapsulate ferulic acid (FA). The effects of FA additive amount, addition order and pH value on the properties of PP-FA-PC/PP-PC-FA nanocomplexes were investigated. It was found that when the mass ratio of PP to FA was 25:1, the PP-FA-PC nanocomplex had the smallest particle size, turbidity and the highest FA encapsulation efficiency. At pH 5.0, the addition order of FA had an effect on the properties of the nanocomplexes, and the formed nanocomplexes had larger particle size, higher turbidity and better encapsulation efficiency than the nanocomplexes formed at pH 7.0. Additionally, the nanocomplexes formed at pH 5.0 also possessed lower ABTS + and DPPH free radical scavenging rates, indicating that FA was successfully encapsulated by PP-PC nanoparticles. The results of Z-average diameter and fourier transform infrared spectra confirmed PP-FA-PC nanocomplex at pH 5.0 encapsulated FA based on hydrogen bonding, hydrophobic and electrostatic interactions. The scanning electron microscopy showed that the PP-FA-PC nanocomplex exhibited irregular and segregated small particles at pH 5.0. Moreover, the PP-FA-PC nanocomplexes at pH 5.0 had the best encapsulation ability and protection effect on FA, and the environmental stability was the best. The release rate of FA loaded by PP-PC nanoparticles was greatly reduced in simulated gastric fluid, while increased in simulated intestinal fluid compared to free FA. This study may provide valuable information for PP-PC nanoparticles as a food-grade delivery system, signifying the potential application in the health food industry.
研究领域:
食品科学
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纳米技术
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生物技术
✓ 已验证
产品关联
DOI
高影响因子
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