MICROPOROUS AND MESOPOROUS MATERIALS
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2022
·
IF 5.876
Erjian Huang,Yueyang Xu,Yachun Ren,Peng Zhang,Yongping Zeng
Faujasite (FAU)-type zeolites are promising adsorbents for the removal of sulfides from fuels, but their micropores are not capable to accommodate the large-sized thiophenic compounds. FAU zeolites (NaX and NaY with the low and high Si:Al ratios, respectively) with hierarchical micro/mesoporous structures were synthesized by sequential acid-base treatment to enhance the adsorption capacity and reduce the limitations of diffusion for the sulfides. To further to improve the desulfurization performance, the hierarchical structure of FAU zeolites containing Cu + were prepared by ion-exchange and methanol vapor-induced reduction methods at a relatively low temperature (473 K). For the large-sized benzothiophene , both the HP-Cu(I)Y and HP-Cu(I)X zeolites with mesopores have a very high adsorption capacity, reaching 51.8 mg S/g and 56.1 mg S/g, respectively. In addition, the results show that HP-Cu(I)X has a higher adsorption capacity than that of some other FAU-type adsorbents reported.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2023
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IF 4.2
Qinglian Wang,Huaiyu Wang,Jintian Zhong,Zhaoyang Qi,Jie Chen,Changshen Ye,Ting Qiu
Deep desulfurization of fuel oil is always a highly challenging issue. In this work, ZrXPTA material was obtained by directly combining the ZrIV active site with PTA, and it was found that ZrXPTA has excellent catalytic activity in the oxidative desulfurization (ODS) process. Further, ZrXPTA was loaded on γ-Al2O3 by the two-step impregnation to obtain a granular Al2O3@ZrXPTA composite. The successful synthesis of the material was verified by X-ray diffraction (XRD), Fourier transform infrared (FT-IR), scanning electron microscopy (SEM), energy-dispersive spectrometry (EDS), and N2 adsorption–desorption. The results show that Al2O3@ZrXPTA maintains the high ODS activity of ZrXPTA and realizes the rapid and complete removal of dibenzothiophene under mild reaction conditions (T = 40 °C, O/S = 4, t = 30 min). The mechanism study shows that the ODS activity of Al2O3@ZrXPTA is wholly derived from the counterpart of ZrXPTA, which benefits from the synergistic catalytic effect between the ZrIV active site and PTA. The direct binding of these two active sites makes the synergistic effect fully exerted. In addition, the recovery of Al2O3@ZrXPTA can be easily realized by simple filtration or decantation, and no significant activity loss was observed after five times recycling. Therefore, Al2O3@ZrXPTA has high ODS activity, high catalytic stability, and great potential as an ODS catalyst in practical applications.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
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IF 5.2
Canyu Cui,Wenwen Wang,Xinyan Lv,Shihui Jiao,Guangsheng Pang
The cobalt carbonate hydroxide one-dimensional (1D) needle-like nanostructure is grown on the non-woven fabric via hydrothermal method . The 1D interlaced needle-like structure not only reduces the pore size of the non-woven fabric but also provides rough micro-nano structure of the superhydrophilic cobalt carbonate hydroxide/non-woven fabric, which is endowed with superhydrophobicity by coating with polydimethylsiloxane (PDMS). The resulting superwetting non-woven fabrics exhibit high separation efficiency for a series of surfactant-stabilized organic solvent/water emulsions (more than 99.3% for both W/O and O/W emulsions) and preferable recyclability (more than 10 cycles). The fluxes for all W/O and O/W emulsions are above 300 L m −2 h −1 . Meanwhile the superhydrophobic fabric exhibits outstanding chemical stability in acid, alkaline and salt solution, and good mechanical durability after abrasion test with sandpaper. The comprehensive performances of the superwetting fabrics based on 1D nanostructure make them possible to be promising material for the separation of organic solvent/water mixtures in polluted water in harsh environments.
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Journal of Energy Chemistry
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2023
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IF 13.1
Baoyu Wang,Peng Zhou,Ximing Yan,Hu Li,Hongguo Wu,Zehui Zhang
In this work, a dual-size MOF-derived Co catalyst (0.2Co 1-NPs @NC) composed of single atoms (Co 1 ) and highly dispersed nanoparticles (Co NPs) was prepared by in-situ Zn evaporation for the high-performance conversion of lignin-derived o- methoxyphenols (lignin oil) to cyclohexanols (up to 97% yield) via cascade demethoxylation and dearomatization. Theoretical calculations elaborated that the dual-size Co catalyst exhibited a cooperative effect in the selective demethoxylation process, in which the Co NPs could initially dissociate hydrogen at lower energies while Co 1 remarkably facilitated the cleavage of the C Ar − OCH 3 bond. Moreover, the intramolecular hydrogen bonds formed in the o -methoxy-containing phenols were found to result in a decrease in the bond energy of the C Ar − OCH 3 bond, which was more prone to be activated by the dual-size Co sites. Notably, the pre-hydrogenated intermediate (e.g., 2-methoxycyclohexanol from guaiacol) is difficult to undergo demethoxylation, indicating that the selective C Ar − OCH 3 bond cleavage is a prerequisite for the synthesis of cyclohexanols. The 0.2Co 1-NPs @NC catalyst was highly recyclable with a neglect decline in activity during five consecutive cycles. This cooperative catalytic strategy based on the metal size effect opens new avenues for biomass upgrading via enhanced C O bond cleavage of high selectivity.
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JOURNAL OF MOLECULAR LIQUIDS
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2023
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IF 6
Li Wang,Yi Zeng,Hongsheng Lu,Zhiyu Huang,Ya Liu
Organogelators and hydrogelators which belong to low-molecular-weight gelators (LMWGs) have attracted considerable attention due to various practical applications. Whether organogelators or hydrogelators, they can congeal single oil or water phase. However, gelators capable of gelation at oil/water interface have thus far remained unexplored. Herein, we report a class of surface-active ionic liquids (SAILs) based on dimethylcyclohexylamine and fatty acids. They can form high-strength gels at the oil/water interface instead of in single oil or water phase. These molecules spontaneously aggregate at oil/water interface, and then self-assemble into lamellar liquid crystalline structure, as evident from POM and SAXS analysis. Rheology analysis shows that these gels are of very high viscosity, strength and stability. These unique characters make these SAILs can effectively block the oil–water interface, which has potential application in oilfield development or oil leaks from underwater tubes.
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Carbohydrate Polymer Technologies and Applications
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2022
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IF 0
Kun Hou,Hu Zhou,Ke Zhu,Chunye Xie,Simin Liu,Yingxiang He,Xingyi Zhu,Ming Wu,Tiefan Huang
Oily wastewater seriously endangers human health. Ti 3 C 2 T x MXene has attracted extensive attention as a building block for separating membranes because of its unique two-dimensional structure and excellent hydrophilicity. In this study, we constructed a superwetting Ti 3 C 2 T x MXene membrane intercalated with sodium alginate. The hydrophilic sodium alginate not only enlarged the nanochannel of the MXene membrane but also decorated the membrane surface and endowed the membrane with excellent surface superwetting properties. The underwater oil contact angle (OCA) was about 151°, indicating an extremely low adhesion between oil and membrane surface. The membrane could also separate a series of oil-water emulsions with high separation efficiency and flux. Due to its excellent underwater superoleophobicity, the membrane demonstrated outstanding antifouling property. Excellent separation performance was maintained even after separation cycles. This work provides insights into the rational use of MXene-based membranes design and demonstrates its potential in the field of membrane separation.
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JOURNAL OF MOLECULAR LIQUIDS
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2022
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IF 6.633
Bingying Wang,Zaisheng Zhu,Jiayu Yin,Xiaoxing Lu
The intensive use of ionic liquid (IL) in various researches and applications induces the imperative need of specific functional ILs. Present work introduces a novel piperazinium-based surface-active IL (SAIL) which shows great potential for the preparation of microemulsion (ME), namely 1-(2-hydroxyethyl)piperazinium laurate ([HEP][C 11 CO 2 ]). Important fundamental physicochemical properties have been investigated, revealing higher surface activity for the SAIL than common surfactants. [HEP][C 11 CO 2 ] is able to solubilize different oil components and water with short-chain alcohol as cosurfactant, forming stable ME in a wide range of ratio of water to oil, and a broad microemulsion region covering over 50 % of the pseudo-ternary phase diagram can be found. The structural transition of water-in-oil to bicontinuous occurs at the water content of 0.60 to 0.65 for the SAIL/1-butanol/ n -heptane/water systems at the ratios of SAIL to 1-butanol of 1:1 and 1:2, as confirmed by electrical conductivity measurements. Moreover, the solubilization of oil and water was investigated in the presence of NaCl, KCl or MgCl 2 , and the optimal salinity was determined. While Mg 2+ induces formation of emulsion probably due to the poor solubility of Mg 2+ /[C 11 CO 2 ] − complexes, the ME system is much more stable with the presence of monovalent ions like Na + and K + . For the NaCl-contained system, the salinity window of the bicontinuous phase changes from 0.030 to 0.025 and 0.020 when the temperature rises from 15 °C to 25 °C and 35 °C, which mainly results from the enhanced hydrophobic interactions and the weakened electrostatic interactions. Present studies elucidate that [HEP][C 11 CO 2 ] is feasible to form various microemulsion systems which may have extensive potential in further applications like size-controlled syntheses and oil recovery.
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Biosensors-Basel
·
2023
·Vol. 13
·期 2
·255
·
IF 5.4
Yanbing Tao,Yunong Zhao,Le Wang,Jing Huang,Yan Chen,Qing Huang,Boxiang Song,Hua-Yao Li,Jianjun Chen,Huan Liu
Myeloperoxidase (MPO) has been demonstrated to be a biomarker of neutrophilic inflammation in various diseases. Rapid detection and quantitative analysis of MPO are of great significance for human health. Herein, an MPO protein flexible amperometric immunosensor based on a colloidal quantum dot (CQD)-modified electrode was demonstrated. The remarkable surface activity of CQDs allows them to bind directly and stably to the surface of proteins and to convert antigen–antibody specific binding reactions into significant currents. The flexible amperometric immunosensor provides quantitative analysis of MPO protein with an ultra-low limit of detection (LOD) (31.6 fg mL−1), as well as good reproducibility and stability. The detection method is expected to be applied in clinical examination, POCT (bedside test), community physical examination, home self-examination and other practical scenarios.Keywords:myeloperoxidase;colloidal quantum dot;flexible immunosensor;inflammatory disease;amperometric sensor
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PubMed
高影响因子
EUROPEAN POLYMER JOURNAL
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2022
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IF 5.546
Jieke Ye,Chen Qian,Yubing Dong,Yaofeng Zhu,Yaqin Fu
In this work, organic solvent-induced shape memory poly(ethylene- co -vinyl acetate) (EVA) monoliths are developed based on a facile thermally induced phase separation (TIPS) method. The obtained EVA monoliths show three-dimensional (3D) interconnected porous structures with tunable porosities from 54.52 % to 73.01 %, average pore sizes from 4.8 to 17.5 μm, and satisfactory shape memory properties. Utilizing the hydrophobic nature of EVA, the porous monoliths effectively separate oil/water by selective oil absorption. Moreover, the EVA monoliths exhibiting oil-triggered shape recovery are designed to be expandable oil absorbers, which shows doubled volumetric absorption capacities of 1.96–2.48 g/cm 3 for pentane, hexane, and octane with a prefixed compression strain of 70 %. The uniform porous structures of monolithic materials and shape memory properties of semi-crystalline elastomers are well combined in this work, which will provide new possibilities for the design of smart porous materials or structures for novel oil absorbers, thermal insulators, and flow reactors.
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ORGANIC ELECTRONICS
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2022
·
IF 3.868
Songman Ju,Chaomin Mao,Yang Liu,Yangbin Zhu,Zhongwei Xu,Kaiyu Yang,Tailiang Guo,Hailong Hu,Fushan Li
Perovskite quantum dots light-emitting diodes (PQLEDs), due to the advantages of high luminous efficiency, high color purity, adjustable spectral range, etc., has an excellent prospect in the next generation of high-definition displays. As an indispensable part of displays, blue PQLEDs are usually achieved by mixing halogen, which, however, will lead to halogen ion migration and phase separation of perovskite material at high temperature and bias pressure, thus make the electroluminescent spectrum redshift. In this manuscript, we propose a strategy to inhibit phase separation of blue perovskite quantum dots (PQDs) by introducing alkali metal , and obtain stable perovskite quantum dot light-emitting diodes. The PQLEDs based on this strategy show an external quantum efficiency (EQE) of 1.87% and a brightness of 3757 cd m −2 , and can still guarantee stable electroluminescence (EL) spectra at a bias of up to 14 V. The work is beneficial for probing into the mechanism of suppressing the phase separation of mixed halogen blue PQDs and offer a promising strategy to enhance the color stability of blue PQLEDs.
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Advanced Optical Materials
·
2022
·Vol. 11
·期 4
·2202058
·
IF 10.05
Chaomin Mao,Songman Ju,Jinping Zheng,Yueting Zheng,Zhongwei Xu,Lihua Lin,Hailong Hu,Kaiyu Yang,Tailiang Guo,Fushan Li
Perovskite quantum dots (PQDs) have been widely used to realize light-emitting diodes (LEDs) with high color purity, efficiency, and wide color gamut. Due to the demand for huge amount of display information, development on high-resolution PQD LEDs (PQLEDs) with massive pixel density are highly desired. Herein, high-resolution PQLEDs are fabricated by using nanoimprint technique. By preparing a honeycomb-insulating polymer polymethyl methacrylate (PMMA) film, the high-resolution pixelated quantum dot emissive layer is formed. In addition, the leakage current of the device is significantly reduced because the direct contact between electron transport layer and hole transport layer is avoided. The PQLEDs based on nanoimprint technology show a resolution of 9072 pixels per inch (PPI), and a maximum external quantum efficiency (EQE) and brightness of 7.81% and 146 400 cd m −2 , respectively. The results demonstrate that high-resolution PQLEDs can be realized by using nanoimprint technology, holding great commercial potential for next-generation near-eye displays.
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Frontiers in Chemistry
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2022
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IF 5.545
Zang Shuaipu,Zhang Xuhui,Sun Yingying,Li Ning,Wang Lei,Li Lin Song
Harnessing environment-friendly and low-cost multinary Cu-In-Zn-S quantum dots (QDs) as emitters for light-emitting diodes (LEDs) has attracted great attention for display and lighting application. However, suboptimal QD structure is a huge obstacle, which results in serious non-radiative recombination and efficiency roll-off. Herein, we synthesized structure-tailored Cu-In-Zn-S/ZnS//ZnS QDs by improving the reactivity of shell growth by 2-ethylhexanoic acid (EHA) ligands. The EHA-assisted shell growth can boost an extended alloyed layer at the core-shell interface and a smoothed confinement barrier, which effectively passivate the interface defects and suppress Förster resonance energy transfer (FRET) process. These synthesized QDs display a bright photoluminescence emission (quantum yield of 83%) and a larger size of 8.4 nm. Moreover, the resulting LEDs based on the EHA-assisted QDs exhibit a maximum luminance of 8074 cd/m2, and a current efficiency of 7.3 cd/A with a low efficiency roll-off. Our results highlight a remarkable ligand strategy to tailor the QD structure for high performance QD-based LEDs.
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