JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2015
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IF 2.037
Qiaobei Dong,Yan Sun,Wei Su,Jia Liu
The use of hydrate formation in porous media is an effective method for gas storage and separation. The equilibrium isotherms of CH4 and N2 in CMK-3, a mesoporous carbon material, were measured under different tetrahydrofuran (THF) concentrations and temperatures. The higher is the temperature required, the greater is the formation pressure needed, but the presence of THF significantly reduces the hydrate formation pressure. When THF exists, both CH4 and N2 form structure II (sII) hydrate; however, the amount of hydrate generation is lower than the theoretical value. As the operating pressure increases, some of the sII CH4 hydrate may transform into structure I (sI) and the amount of hydrate generation increases. The desorption isotherms showed that the gas hydrate decomposed completely when the operating pressure was below the hydrate decomposition pressure. In addition, it is feasible to separate gas mixtures via hydrate formation using the different gas hydrate formation pressures.
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JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2014
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IF 2.045
Kelei Zhuo,Hao Ren,Yujing Wei,Yujuan Chen,Jingjing Ma
Activity coefficients of the 1-alkyl-3-methylimidazolium bromide [Cnmim]Br (n = 3 to 8) ionic liquids (ILs) in fructose + water mixed solvents at 298.15 K were determined by cell potential measurements. The molalities of [Cnmim]Br ranged from (0.005 to 0.1) mol·kg–1 and those of fructose from (0.2 to 0.8) mol·kg–1. Gibbs free energy interaction parameters were also obtained together with salt constants. The interactions between [Cnmim]Br and fructose are mainly controlled by electrostatic interactions. Gibbs free energy interaction parameters (gES) and salting constants (kS) are negative for the ILs (n = 3 to 6), indicating fructose are salted-in by the ILs in water, whereas fructose are salted-out by the ILs (n = 7 and 8).
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Journal of Nanomaterials
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2014
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IF 1.611
Shifeng Li,Yanming Shen,Min Xiao,Dongbin Liu,Lihui Fan,Zhigang Zhang
Controlled release formulations have been shown to have potential in overcoming the drawbacks of conventional plant growth regulators formulations. A controlled-release formulation of 1-naphthylacetic acid (NAA) and indole-3-butyric acid (IBA) simultaneous intercalated MgAl-layered double hydroxides (LDHs) was prepared. The synthetic nanohybrid material was characterized by various techniques, and release kinetics was studied. NAA and IBA anions located in the gallery of MgAl-LDHs with bilayer arrangement, and the nanohybrids particles were of typical plate-like shape with the lateral size of 50–100 nm. The results revealed that NAA and IBA have been intercalated into the interlayer spaces of MgAl-LDHs. The release of NAA and IBA fits pseudo-second-order model and is dependent on temperature, pH value, and release medium. The nanohybrids of NAA and IBA simultaneously intercalated in LDHs possessed good controlled release properties.
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SOLAR ENERGY
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2024
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IF 6
Zhi-Ping Huang,Hui-Li,Wei-Ze Wang,Hu Li,Li-Mei Lin,Zhi-Gao Huang,Shui-Yuan Chen,Gui-Lin Chen
Sb 2 (S,Se) 3 is a promising photovoltaic material due to its tunable bandgap, high thermal stability, and low-cost production potential. However, films produced by close-spaced sublimation (CSS) often suffer from defects that reduce efficiency. In this work, lithium (Li) doping was introduced to improve crystal quality, carrier concentration, and conductivity. The lithium was incorporated into the sublimation source via molten salt treatment, resulting in a uniform Li-Sb 2 (S,Se) 3 thin film. The resulting ITO/CdS/Li-Sb 2 (S,Se) 3 /PbS/Carbon solar cell achieved a power conversion efficiency of 6.18%, a significant improvement over undoped devices. The study further investigates the optoelectronic properties, revealing that Li doping effectively reduces non-radiative recombination, improves carrier extraction, and increases the valence band maximum (VBM), optimizing energy level alignment for enhanced hole transport. Additionally, the improved surface conductivity and higher carrier concentration due to Li doping contributed to enhanced carrier transport and reduced recombination.This research demonstrates that alkali metal doping can enhance the optoelectronic properties of Sb 2 (S,Se) 3 films, providing a pathway for further efficiency improvements in antimony-based thin-film solar cells.
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Journal of Materials Chemistry A
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2024
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IF 10.7
Jiarong Li,Shude Liu,Yuanzhao Xie,Fengluan Jiang,Xinyu Huang,Jianfeng Xia,Limin Wu,Yonghui Deng
Core–shell magnetic polymer microspheres with porous organic shells are highly desired for adsorption, separation, delivery/immobilization of guest objects in catalysis, and drug release. Herein, an amphiphilic block copolymer-directed interfacial assembly and polymerization strategy was reported to synthesize magnetic mesoporous 3-aminophenol–formaldehyde resin (MMAPF) microspheres. The uniform MMAPF microspheres exhibit well-defined core–shell structures, controllable porous shell thickness, high magnetization, and superparamagnetic properties. The abundant hydroxyl and amino groups in the porous shell offer the exceptional capability for stable immobilization of ultrafine Au nanoparticles, which can serve as a magnetically recoverable heterogeneous catalyst for catalyzing the hydrogenation of 4-nitrophenol with a fast reaction rate constant (0.59 min−1) and conversion rate (99%) at room temperature and good recycling stability.
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ELECTROCHIMICA ACTA
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2025
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IF 5.6
Hongdi Zheng,Liuyan Zhang,Yingying Li,Binkai Yuan,Shixuan Wang,Zeyi Guan,Gengzhe Shen,Guibin Tan,Yanmei Zhang
A honeycomb-like porous self-supporting Ni-Al(G) electrode was successfully prepared by low-pressure cold spraying combined with heat treatment. The main components of the electrode were Ni and NiAl. Graphene was uniformly dispersed throughout the electrode, exhibiting a 3-D distribution, which increased the active site of electrode and improved the electron exchange rate. The electrochemical properties of the Ni-Al(G) electrode were characterized using 6 M KOH. As a result, the Ni-Al(G) electrode requires only an overpotential of 130 mV to achieve a current density of 100 mA cm −2 , and a Tafel slope of 35.5 mV dec −1 . In addition, the electrode exhibited excellent stability. The addition of graphene and the honeycomb-like porous structure of the Ni-Al(G) electrode resulted in an excellent hydrogen evolution activity. This study provides a simple and rapid technique for building high-performance, low-cost, and industrially available electrodes for the efficient alkaline HER.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Hui Li,Rui Da,Li-Quan Yao,Hu Li,Peng Tang,Jin-Rui Cai,Li-Mei Lin,Shui-Yuan Chen,Dong Wei,Li-Ping Cai,Gui-Lin Chen
Sulfoselenide Sb 2 (S,Se) 3 , as a potential light-harvester, possesses a flexibly tunable bandgap of 1.1–1.7 eV to match solar radiation spectrum. However, the preparation of a homogenous Sb 2 (S,Se) 3 film is still challenging due to the different growth kinetics in sulfide and selenide compound, which consequentially leads to phase separation, lattice disorder and unfavored band level. This dilemma also occurs in the simple and well-established close space sublimation (CSS) method, and poses a devastating carrier recombination in Sb 2 (S,Se) 3 solar cells. Herein, alloyed powders of Sb 2 (S,Se) 3 are exquisitely synthesized by a thorough gas-solid reaction, delivering a uniform and single phase composition distribution as well as finely-tunable S/Se ratio. Compared with a physically mixed powder source (Sb 2 S 3 /Sb 2 Se 3 ), this alloyed Sb 2 (S,Se) 3 source allows for the fabrication of a homogeneous Sb 2 (S,Se) 3 thin film by CSS, rendering improved ( hk1 ) orientation, dense morphology, a more consistent longitudinal S/Se ratio, and enhanced energy level arrangement. These advancements contribute to enhance carrier transport and reduce carrier recombination. As a result, the efficiency of the solar cell is remarkably boosted from 2.59% to 5.46%, which is among of the highest PCE of full-inorganic Sb 2 (S,Se) 3 devices fabricated through the CSS method.
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CHEMICAL PHYSICS LETTERS
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2024
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IF 2.8
Lu Li,Weiyi Chen,Meng Wang,Xinjiang Shi,Shiming Zhang,Debao Xiao
In this paper, we present the first application of organic hole-transporting semiconductors 4,4′,4′'-tris(carbazol-9-yl)triphenylamine (TCTA) and 4,4′-cyclohexylbis[N,N-bis(4-methylphenyl) aniline] (TAPC) in electrochromism area, demonstrating that TCTA or TAPC is suitable for use as hole-transporting materials on the anode of 1,1′-bis(3-sulfopropyl) viologen (SPV)-based electrochromic devices. For such devices, we obtain a decreased driving voltage of SPV-based electrochromic devices down to −2.0 V in the presence of TCTA or TAPC with comparison to that of ca. −2.5 V in the absence of the hole-transporting material. The optical contrast of the device increased from 57.19 % (without hole-transport layer) to 66.41 % (TCTA) or 62.97 % (TAPC) at 533 nm. The response time of 66.2 s in the absence of hole-transporting layer can decrease to 30.6 s with TCTA and 62.7 s with TAPC, respectively. The coloration efficiency of the as-fabricated devices at 533 nm can reach from 67.3 cm 2 /C (SPV-only) up to 153.2 cm 2 /C (TCTA) and 80.5 cm 2 /C (TAPC). This work paved a new way for boosting electrochromic performances of viologen-based devices via electrode modification of anode by hole-transporting material TCTA and TAPC which have been used effectively and efficiently in organic electroluminescent devices and solar cells.
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INORGANIC CHEMISTRY
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2025
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IF 4.7
Miaomiao Chen,Huili Zhao,Han Xue,Yan Liang,Min Ji,Min Wang
B(C6F5)3-based frustrated Lewis pairs (FLPs) have made remarkable progress in metal-free catalytic reduction. However, the high affinity of B(C6F5)3 for oxygen makes it susceptible to irreversible poisoning when exposed to H2O, limiting its widespread application in reductive amination. To overcome the influence of H2O, a hydrophobic catalyst, B(C6F5)3@Rn–1-MIL-101 (n = 3, 5, 7), was developed by confining B(C6F5)3 within the nanocages of metal–organic frameworks (MOFs) modified with alkyl chains. The hydrophobic strength of the catalyst could be adjusted by varying the length of the alkyl chain. At n = 3, the alkyl chain was too short to be hydrophobic, while the excessively long alkyl chain blocked the pore channels and adversely affected the loading of B(C6F5)3 at n = 7. Only the catalyst B(C6F5)3@R4-MIL-101 synthesized at n = 5 could effectively facilitate the reductive amination of aldehydes or ketones with amines in a “wet solvent.” The strategy of combining hydrophobic MOFs with B(C6F5)3 to prepare heterogeneous catalysts for FLP catalysis not only provides a fresh avenue for investigating catalytic systems for reductive amination but also represents an innovative approach to advancing FLP chemistry.
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APPLIED SURFACE SCIENCE
·
2024
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IF 6.3
Huiyuan Cheng,Jingwei Hu,Zihan Liu,Guangping Lei,Guojun Xi,Yayun Zhang,Hantao Liu,Xuhuan Guo,Huiyun Ren
Developing novel adsorbents for CO 2 capture and separation offers an efficient approach to relieving global environmental problems. To promote CO 2 capture from flue gas, novel Cr 3 O@MIL-101(Cr) composites was synthesized through packing [Cr 3 O(HCOO) 6 (H 2 O) 3 ]NO 3 into MIL-101(Cr) cages. The resultant composite Cr 3 O@MIL-101(Cr) presents higher CO 2 uptakes at lower pressure ranges, benefiting from the increased content of unsaturated Cr(III) ions and micropores relative to MIL-101(Cr). Meanwhile, IAST selectivity for CO 2 /N 2 mixture reached 50.2 under standard temperature and pressure, outperforming most of the reported materials. Further GCMC simulations reveal that the synergistic effect of [Cr 3 O(HCOO) 6 (H 2 O) 3 ] + , NO 3 − and MIL-101 (Cr) could effectively facilitate the interactions with CO 2 molecules and hinder N 2 molecules from approaching the optimal adsorption sites. Thus the [Cr 3 O(HCOO) 6 (H 2 O) 3 ]NO 3 encapsulated MIL-101(Cr) can be recommended as a promising adsorbent for superior CO 2 /N 2 separation.
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LWT-FOOD SCIENCE AND TECHNOLOGY
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2025
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IF 6.6
Yongqiang Xu,Menglin Guo,Chenge Zhang,Keyu Meng,Fuqiang Liang,Jiayi Shi
Pumpkin seed protein (PSP), a valuable byproduct of pumpkin seed oil extraction, is abundant in essential amino acids but exhibits weak functional properties, limiting its processing and application potential. This study aimed to evaluate the effects of covalent modification with epigallocatechin-3-gallate (EGCG) at varying concentrations on the structural, functional and in vitro digestion properties of PSP. Sulfhydryl and free amino acid content analyses, combined with sodium dodecyl sulfate-polyacrylamide gel electrophoresis, confirmed the formation of covalent complexes through C-S and C-N bond formation between EGCG and PSP. Upon binding with EGCG, the secondary structure of PSP was predominantly shifted from a β-sheet (from 40.70 % to 11.70 %) to a random coil (from 23.70 % to 46.80 %), accompanied by enhanced flexibility and a 52.59 % reduction in surface hydrophobicity. The solubility of the PSP-EGCG covalent complexes increased by 66.07 %, while the maximum emulsifying activity reached 421.91 m 2 /g. However, protein digestibility decreased by up to 25.50 % with higher EGCG concentrations. These findings provide a theoretical foundation for improving PSP properties and applying its complexes in specialised functional foods.
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EUROPEAN JOURNAL OF MEDICINAL CHEMISTRY
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2024
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IF 6
Chao Yang,Haojie Cai,Xinying Zhu,Lei Zhang,Jing Li
Xanthine oxidoreductase (XOR) and uric acid transporter 1 (URAT1) are two most widely studied targets involved in production and reabsorption of uric acid, respectively. Marketed drugs almost target XOR or URAT1, but sometimes, single agents might not achieve aim of lowering uric acid to ideal value in clinic. Thus, therapeutic strategies of combining XOR inhibitors with uricosuric drugs were proposed and implemented. Based on our initial work of virtual screening, A and B were potential hits for dual-targeted inhibitors on XOR/URAT1. By docking A / B with XOR/URAT1 respectively, compounds I1-7 were designed to get different degree of inhibition effect on XOR and URAT1, and I7 showed the best inhibitory effect on XOR (IC 50 = 0.037 ± 0.001 μM) and URAT1 (IC 50 = 546.70 ± 32.60 μM). Further docking research on I7 with XOR/URAT1 led to the design of compounds II with the significantly improved inhibitory activity on XOR and URAT1, such as II11 and II15 . Especially, for II15 , the IC 50 of XOR is 0.006 ± 0.000 μM, superior to that of febuxostat (IC 50 = 0.008 ± 0.000 μM), IC 50 of URAT1 is 12.90 ± 2.30 μM, superior to that of benzbromarone (IC 50 = 27.04 ± 2.55 μM). In acute hyperuricemia mouse model, II15 showed significant uric acid lowering effect. The results suggest that II15 had good inhibitory effect on XOR/URAT1, with the possibility for further investigation in in-vivo models of hyperuricemia.
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