JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
·
2024
·
IF 1.9
Rong Wang,Shuai Liu,Zhongying Li,Guanyi Peng,Ming Duan,Jinlong Pan,Hui Dong
The synergistic effect of ionic liquids (ILs) and anionic surfactants, ILs and cationic surfactants, and ILs and nonionic surfactants to form microemulsions has been studied by other researchers, while the synergistic effect of ionic liquids and zwitterionic surfactants to form microemulsions has not been reported. Here, we report the synergistic effect of imidazolium ionic liquid, 1-hexadecyl-3-methylimidazolium bromide [C16mim] [Br], and betaine-type zwitterionic surfactant, cocamidopropyl hydroxysultaine (CAHS), as surfactants, to form microemulsions with n-butanol, n-hexane and water. Phase behavior of the systems with different mass ratios of two surfactants, varied mass ratios of surfactant to cosurfactant (Km), and different temperatures are investigated by pseudo-ternary phase diagrams. The single-phase region of the microemulsion is maximized when the ratio of CAHS to [C16mim] [Br] is 1:4 and Km is 1.5, with little temperature dependence. The size and the polarity of microemulsions are explored. The synergistic effect of [C16mim] [Br] and CAHS is confirmed by surface tension and interface tension. A universal preparation method to form microemulsions by combining ionic liquids with zwitterionic betaine-type surfactants is provided and it play a pivotal role in broadening the potential uses of ILs in microemulsions.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Huizhen Sun,Xiuhua Chen,Zongdeng Wu,Wenhui Ma,Shaoyuan Li,Chen Li,Dandan Wu,Kaixin Fu,Kexiang Ding
Lead ions (Pb(II)) in industrial wastewater pose a serious threat to the ecological environment and human health due to their toxicity and persistence. Traditional treatment methods often struggle to achieve both efficient capture and sensitive detection of Pb(II). In this study, a novel bifunctional covalent organic framework (BTT-DHBD-COF) with ortho N-S/N-O dual sites was innovatively designed to enable highly selective adsorption and ultrasensitive detection of Pb(II). Adsorption studies revealed that the BTT-DHBD-COF exhibits a high adsorption capacity for Pb(II) (570.7 mg/g at pH 5) and rapid kinetics (equilibrium reached in 10 min). The BTT-DHBD-COF/GCE sensor demonstrated a wide linear detection range (0.0001–0.5 μM) and an ultralow detection limit (0.03 nM). In real water samples (lake water and tap water), it achieved high recovery rates of 96–108 % with relative standard deviations (RSDs) of 2.5–3.45 %. Experimental results and theoretical calculations confirmed that the N-S/N-O dual sites significantly enhance Pb(II) capture and detection through strong coordination (with Pb transferring 0.46 and 0.44 electrons to the N-S and N-O sites, respectively) and efficient electron conduction via the π-conjugated framework. Compared to single binding sites (S: 0.42 e, O: 0.40 e, N: 0.37 e), the significant charge transfer of the dual site highlights its key role. This work presents an innovative bifunctional “adsorption-detection” strategy for the remediation of Pb(II) pollution in industrial wastewater.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2021
·
IF 19.503
Dan Xu,Ruirui Liu,Jianfeng Li,Huacheng Zhao,Jiantai Ma,Zhengping Dong
Transfer hydrogenation reactions using non-noble metal-based nanocatalysts are extensively attractive due to their low-cost and green reaction conditions. But construction of such catalysts with maximum metal atom efficiency and high catalytic activity is still a challenging research goal. Here, atomically dispersed Co catalysts with Co-N 4 active sites were fabricated, which builds a bridge for transfer hydrogenation between nitroarenes and saturated N-heterocycles in aqueous solution. The TOF value of the transfer hydrogenation reaction is much higher than nanoparticle catalyst for this reaction. Density functional theory (DFT) calculations and control experiments reveal that the excellent performance origins from the Co-N 4 sites, which combines the dehydrogenation of 1,2,3,4-tetrahydroquinoline with hydrogenation of nitrobenzene in one-pot. This work not only has an in-depth understanding of active sites but also shows a unique activity to the challenging, highly efficient, and green transfer hydrogenation reaction.
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2024
·
IF 5.3
Hui Shao,Bingqiao Yang,Huihua Luo,Ruiqi Ge,Jie Wu
In this study, N-OSS combined with DDA was examined as an novel collector. The collecting performances and their synergetic interaction mechanisms were investigated comprehensively. The micro-flotation results illustrated N-OSS/DDA exhibited excellent selectivity on separation without pre-activation. Contact angle tests revealed N-OSS/DDA could selectively enhance the hydrophobicity of spodumene, whereas, they barely affected that of albite. FTIR, SEM-EDS and Zeta potential revealed N-OSS/DDA might co-adsorb on spodumene surface rather than that of albite. XPS analysis and DFT calculations inferred the O 1 2p orbitals of -COO- within N-OSS could bond with Al 3s orbitals and the -NH 3 + groups of DDA adsorbed onto spodumene surface via hydrogen bonding and electrostatic attraction. Meanwhile, the hydrogen bonding between N-OSS and DDA promoted the co-adsorption on spodumene surface. While N-OSS/DDA weakly adsorbed on albite surface through physical adsorption. N-OSS/DDA exhibited outstanding floatability, which maybe a good substitute for conventional collectors in future.
✓ 已验证
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2019
·
IF 4.182
Xu Zhang,Yaquan Wang,Xiao Wang,Hengbao Chen,Hongyao Li,Chao Sun,Liying Sun,Chunyang Fan,Cui Wang
In this study, an efficient route was developed to prepare high quality erionite (ERI) zeolite by hydrothermal conversion of faujasite (FAU) zeolite as an aluminosilicate source in the presence of N,N -dimethylpiperidinium hydroxide (DMPOH). Pure ERI zeolite was successfully synthesized within only 8 h by carefully controlling the alkalinity (OH − /SiO 2 ) of the initial gel and the proportion of DMP + and K + . Compared with the conventional ERI zeolite synthesized via a Charge Density Mismatch method, the FAU-derived ERI zeolites show superior properties such as higher crystallinity , smaller crystal size, larger micropore volume and better hydrothermal stability. In addition, catalytic test in the ethanol dehydration reaction shows that the ERI zeolites obtained from FAU exhibit extraordinary performances to those of the conventional one. Finally, crystallization process from FAU to ERI was investigated in detail by UV Raman and XRD . The results show that the framework of ERI zeolite is formed by rearrangement of 4-rings generated from the initial FAU zeolite.
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2015
·Vol. 132
·期 18
·
IF 1.768
Yan-Ling Luo,Jun Zhang,Fang-Jie Han,Feng Xu,Ya-Shao Chen,Ru Liu
Thermoresponsive poly( N -isopropyl acrylamide) (PNIPAM)- block -hydroxy-terminated polybutadine- block -PNIPAM triblock copolymers were synthesized by atom transfer radical polymerization; this was followed by the in situ epoxidation reaction of peracetic acid. The copolymers were characterized by 1 H-NMR, Fourier transform infrared spectroscopy, and size exclusion chromatography measurements, and their physicochemical properties in aqueous solution were investigated by surface tension measurement, fluorescent spectrometry, ultraviolet–visible transmittance, transmission electron microscopy observations, dynamic light scattering, and so on. The experimental results indicate that the epoxidized copolymer micelle aggregates retained a spherical core–shell micelle structure similar to the control sample. However, they possessed a decreased critical aggregate concentration (CAC), increased hydrodynamic diameters, and a high aggregation number and cloud point because of the incorporation of epoxy groups and so on. In particular, the epoxidized copolymer micelles assumed an improved loading capacity and entrapment efficiency of the drug, a preferable drug-release profiles without an initial burst release, and a low cytotoxicity. Therefore, they were more suitable for the loading and delivery of the hydrophobic drug as a controlled release drug carrier. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 41877.
✓ 已验证
DOI
高影响因子
Green Chemical Engineering
·
2022
·
IF 0
Jianguo Liu,Jiangmin Sun,Thishana Singh,Shanshan Lin,Longlong Ma
Although precious transition metals such as palladium, platinum, and iridium are widely used in hydrogenation reactions, the earth-abundant transition metal-catalyzed highly selective semi-hydrogenation of terminal alkynes to terminal alkenes remains poorly developed and a challenge. Herein we demonstrate the excellent selective, cost-effective semi-hydrogenation of terminal alkynes via a novel graphene encapsulated Ni@N/C catalyst. The graphene layer encapsulated nano-catalyst Ni@N/C could significantly avoid metal leaching and improve the stability of the catalyst. The strong interaction of nitrogen with the Ni nanoparticles regulates the activity of Ni towards selective semi-hydrogenation of terminal alkynes. Substrates having un-functionalized as well as functionalized substituents, and substrates having sensitive functional groups (olefins, ketones) which pose a challenge to hydrogenate, were semi-hydrogenated with excellent conversion (up to 99%) and selectivity (up to 99%) under optimized reaction conditions.
✓ 已验证
DOI
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Yuanrong Zhang,Shuaitao Li,Xun Hu,Yanfen Fang,Ran Duan,Qifeng Chen
The construction of heterointerface in photocatalyst is an efficient approach to boost the separation and utilization efficiency of charge carriers, which is challenging and crucial in photocatalysis. Here, the construction of melon-structured carbon nitride/ N -doped WO 3 (MCN/NW x ) heterojunction photocatalyst was achieved by a method of prealcoholysis combined with thermal polymerization, where N -doping of WO 3 was achieved in-situ in the formation of heterojunction. The promoted charge separation efficiency was realized through the charge transfer from the conduction band of N -doped WO 3 to the valence band of the MCN. Density functional theory calculation results showed that the formation of the W–N heteroatom-interface led to the increase of density of states at the heterointerface and decrease of the band gap. The MCN/NW x nanocomposite featured a metallic band structure of the nanocomposite photocatalysts, resulting in the enhanced photocatalytic activity . The photocatalytic hydrogen evolution activity of the MCN/NW 2 was enhanced about 2.5 times than that of MCN. This research provides a novel insight into the construction of a novel heteroatom-junction that boosts the separation efficiency of charge carriers, and thereby improves the photocatalytic activity.
✓ 已验证
DOI
高影响因子
Environmental Science and Ecotechnology
·
2024
·
IF 14
Chang Liu,Lin Li,Linji Xu,Tanglong Zhang,Qiang He,Xiaodong Xin
N,N bis(carboxymethyl)- l -glutamate (GLDA) is an eco-friendly chelating agent that effectively extracts multivalent metal ions from waste activated sludge (WAS) flocs, which could potentially alter their structure. However, the effect of GLDA on the production of volatile fatty acids (VFAs) from WAS is not well known. Here, we demonstrate that pretreatment with GLDA at a concentration of 200 mmol per kg VSS results in a significant increase of 142 % in extractable extracellular polymeric substances and enhances the total VFAs yield by 64 % compared to untreated samples. We reveal GLDA's capability to mobilize organic-binding multivalent metal ions within sludge flocs. Specifically, post-pretreatment analyses showed the release of 69.1 mg L −1 of Ca and 109.8 mg L −1 of Fe ions from the flocs, leading to a more relaxed floc structure and a reduced apparent activation energy (10.6 versus 20 kJ mol −1 ) for WAS solubilization. Molecular dynamic simulations further demonstrate GLDA's preferential binding to Fe 3+ and Ca 2+ over Mg 2+ . Our study suggests that GLDA pretreatment causes minimal disruption to reactor stability, thereby indicating the stability of microbial community composition. GLDA has emerged as a viable pretreatment agent for enhancing volatile fatty acids production from waste activated sludge.
✓ 已验证
DOI
PubMed
高影响因子
CHROMATOGRAPHIA
·
2025
·
IF 1.3
Lou Doudou,Zhu Yuan,Fan Jingke,Fan Lin,Zhu Qingfu,Lu Yihong,Zhao Shuqiang
N-glycosylation heterogeneity has a significant impact on the clinical safety, efficacy, pharmacokinetics (PK), and pharmacodynamics of monoclonal antibody (mAb) drugs, thus becoming a critical quality attribute (CQA) of great concern. In the registration quality standards for bevacizumab produced by different manufacturers, either lacking supervision of N-glycosylation or the detection methods and criteria vary greatly among manufacturers, leading to compromised comparability of results. Besides, the existing quality control system pays insufficient attention to the correlation between glyco-relevant physicochemical properties and glycosylated modification. In this study, a standardized hydrophilic interaction liquid chromatography-fluorescence detection (HILIC-FLD) N-glycan profiling method was developed, which had been proven to be more time-saving and easier to operate and was used for the parallel analysis of N-glycan profiles in bevacizumab products provided by 8 different manufacturers. We also paid attention to the glycosylation-related CQAs including charge heterogeneity, isoelectric point, non-glycosylated heavy chain (NGHC) and aggregates. Results revealed obvious difference in N-glycosylation, NGHC and aggregates among manufacturers. Among all the mAbs, the abundance of major glycoforms showed similar order yet the percentage of the same glycoform varies greatly. In summary, the standardized method could offer a reliable, efficient and practical approach for the parallel analysis and comparison of glycosylation and related CQA heterogeneity among manufacturers, providing a reference for more effective quality control of mAb drugs.
✓ 已验证
产品关联
DOI
高影响因子
ZEITSCHRIFT FUR KRISTALLOGRAPHIE-NEW CRYSTAL STRUCTURES
·
2023
·Vol. 238
·期 6
·1069-1070
·
IF 0.3
Yan-Qing Wang,Wen-Qing Yan,Li-Xue Nie,Ping-Ping Luan,Chao-Qun Li
C 20 H 22 Cu 3 N 8 O 10 , monoclinic, C 2/ c (no. 15), a = 12.0766(11) Å, b = 16.2778(14) Å, c = 14.7605(13) Å, β = 97.8580(10) ∘ , V = 2874.4(4) Å 3 , Z = 4, R
gt ( F ) = 0.0420, wR
ref ( F
2 ) = 0.0988, T = 298.15 K.
✓ 已验证
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2014
·
IF 3.916
Xinyu Hu,Liandong Feng,Wei Wei,Aming Xie,Shiming Wang,Jianfa Zhang,Wei Dong
Salecan is a novel water-soluble, high molecular mass extracellular β-glucan produced by Agrobacterium sp. ZX09. Salecan has excellent physicochemical and biological properties, making it very suitable for hydrogel preparation. In this study, a series of novel semi-interpenetrating polymer network (semi-IPN) hydrogels containing Salecan and poly(N,N-dimethylacrylamide-co-2-hydroxyethylmethacrylate) (poly(DMAA-co-HEMA)) were synthesized by radical polymerization and semi-IPN technology. Structure and morphology of the hydrogels were characterized by FTIR, XRD, TGA and SEM. The semi-IPNs had a well-interconnected porous structure with tunable pore size ranging from 6 to 41 μm. Swelling capability of the hydrogels was improved by introducing the hydrophilic Salecan. Rheological results indicated that the incorporation of poly(DMAA-co-HEMA) into hydrogels enhanced the storage modulus. Compression tests revealed that these semi-IPNs were robust materials with compressive modulus between 13.3 and 90.5 kPa, the addition of Salecan increased the fracture strain from 71.1% to 88.8%. Degradation and cytotoxicity tests demonstrated that semi-IPNs were degradable and non-toxic.
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）