CHEMICAL ENGINEERING JOURNAL
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2014
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IF 4.058
Nantong Zhang,Xuan Yang,Xinyao Yu,Yong Jia,Jin Wang,Lingtao Kong,Zhen Jin,Bai Sun,Tao Luo,Jinhuai Liu
In this study, adsorption potential of a typical aluminum-based metal–organic frameworks (MOFs), Al 12 O(OH) 18 (H 2 O) 3 (Al 2 (OH) 4 )(BTC) 6 ·24H 2 O (referred as MIL-96), was investigated for defluoridation of drinking water using batch experiment. The effects of different parameters such as pH, contact time, initial fluoride concentration, and competing anions were studied to understand the adsorption behavior of the adsorbent under various conditions. Optimum removal of fluoride ions occurred in a pH range of 3–10. The results indicated that the defluoridation efficiency and aluminum residual of MIL-96 were far superior to that of activated alumina (AA) or nano-alumina (NA). The Langmuir equilibrium model was found to be suitable for describing the fluoride sorption on MIL-96. The maximum fluoride uptake capacity for MIL-96 was calculated to be 31.69 mg g −1 at the temperature of 298 K. Moreover, there were no significant influence on fluoride removal by MIL-96 in the presence of chloride, nitrate, sulfate, bicarbonate and phosphate. Temperature study was carried out at 298 K, 308 K and 318 K revealed that the adsorption process was endothermic reactions. In column tests using real groundwater as influent, about 140 bed volumes (BVs) of groundwater were treated before breakthrough was reached under space velocities (SVs) of 4 h −1 . Results from this study demonstrated the MIL-96 is a promising adsorbent that can be potentially used into drinking water processes.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF LIGHTWAVE TECHNOLOGY
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2024
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IF 4.1
Guosheng Zhang,Zhiyu Wang,Jinhui Shi,Sheng Zhou,Benli Yu
Overcoming the impact of pH on the performance of random lasers (RLs) has emerged as a significant challenge in its application for biomedical therapy. To tackle this issue, this paper proposes a pH-insensitive hydrogel fiber RLs. The RLs consists of Rhodamine B dye-doped p(acrylamide-co-acrylic acid, AM-co-AA) hydrogel as the fiber core and calcium alginate (Ca-alginate) hydrogel as the cladding, termed as p(AM-co-AA)/Ca-alginate hydrogel fiber RLs. The prepared RLs not only operate reliably at different pH levels but also allow for tuning of its emission wavelength by adjusting the temperature, ensuring the reliability and safety of photothermal therapy. Experimental results demonstrate that the threshold of p(AM-co-AA)/Ca-alginate hydrogel fiber RLs is only 0.23 mJ/cm². Moreover, within the range of 20∼80°C, the random laser emission wavelength can be tuned by controlling the temperature, with a maximum tunable range of 5.6 nm and good reversibility. Most importantly, the random laser intensity and wavelength of the p(AM-co-AA)/Ca-alginate hydrogel fiber RLs exhibit excellent stability when the pH value changes within the range of 3.5 to 9.5, indicating its exceptional ability to resist pH interference. We believe that the hydrogel fiber RLs proposed in this paper, leveraging the porous structure of hydrogel to reduce the laser threshold and employing the “core-cladding” structure to enhance stability, holds broad potential applications in the biomedical field.
研究领域:
生物医学工程
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材料科学
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光学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
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IF 5.2
Feng Wang,Chao Li,Haohao Wang,Lu Yu,Fuming Zhang,Robert J. Linhardt
Natural amino acid polymers have been wide-used as bio-compatible emulsion stabilizers . In this study, Amphiphilic O(Phe- r -Glu)s were synthesized through the papain-catalyzed random polymerization of L -phenylalanine and L -glutamate with the major degree of polymerization value of 6–7. The polymerization yield was increased by more than 35 % using choline to reduce the energy barrier for the amino substrates to form the tetrahedral intermediate with the catalytic triad. The squalene/water emulsions stabilized by O(Phe- r -Glu) nanoparticles were pH-insensitive at pH 1–12. The investigation of mechanism found the combined effects of steric hindrance , electrostatic repulsion and the viscosity of the emulsion contributed to the stability of the emulsion droplets. Under acidic condition, the layers of O(Pho- r -Glu)s particle aggregates formed around the emulsion droplets and the higher viscosity of emulsion mainly contributed to the stability of emulsions . At basic condition, the strong electrostatic repulsion between emulsion droplets covered by the negatively charged O(Pho- r -Glu) particles and the steric hindrance contributed mainly to the prevention of the coalescence of emulsion droplets. The application of enzymatically synthesized amphiphilic peptides in emulsion, along with tunable performance through the polymerization of amino substrates, is in line with the sustainable development requirements in fields such as pharmaceuticals, food and cosmetics.
研究领域:
生物材料学
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食品科学
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制药工程
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
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2022
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IF 8.008
Caiping Ding,Shasha Cheng,Fang Yuan,Cuiling Zhang,Yuezhong Xian
Calcium and chloride levels are closely related to lysosome dysfunction. However, the simultaneous measurement of calcium (Ca2+) and chloride (Cl–) in acidic subcellular organelles, which is conducive to a deep understanding of lysosome-related biological events, remains a challenge. In this study, we developed a pH-insensitive, ratiometric NIR nanoprobe for the simultaneous detection of Ca2+ and Cl– in acidic lysosomes and determined the roles of the two ions in lysosome function. The upconversion nanoprobe with blue, green, and red emissions was modified with a Ca2+-sensitive dye (Rhod-5N) and Cl–-responsive fluorophore (10,10′-bis[3-carboxypropyl]-9,9′-biacridinium dinitrate, BAC). As a result of a dual-luminescence resonance energy transfer between upconversion nanoparticles (UCNPs) and Rhod-5N/BAC, the blue and green upconversion luminescence (UCL) of UCNPs were quenched and the red UCL was used as the reference signal. The ratiometric upconversion nanoprobe possesses a specific ability for the concurrent recognition of Ca2+ and Cl– ions independent of the influence of the environmental pH. To locate the probe in the lysosome, dextran was further modified with upconversion nanoparticles. Then, the nanoprobe with a high spatial resolution was constructed for the simultaneous monitoring of Ca2+ and Cl– in acidic lysosomes. Moreover, it was found that the reduction of lysosomal Cl– affects the release of lysosomal Ca2+, which further blocks the activities of specific lysosomal enzymes. The ratiometric NIR nanoprobe has great potential for decoding and evaluating lysosomal diseases.
研究领域:
纳米技术
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生物医学工程
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细胞生物学
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）