JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2018
·
IF 3.794
Lan Wang,Xiaoyan Shu,Facheng Yi,Dadong Shao,Kuibao Zhang,Haibin Zhang,Xirui Lu
A series of Nd and Ce co-doped Gd 2- x Nd x Zr 2- y Ce y O 7 (0.0 ≤ x , y ≤ 2.0) ceramics were rapidly fabricated through spark plasma sintering (SPS) within 3 min. The effects of Nd and Ce contents on the phase composition, lattice parameter , active modes, microtopography and microstructure have been investigated in detail. XRD studies reveal that the compositions corresponding to 0.0 ≤ y ≤ 1.0 show a single phase and beyond 1.0 exhibit multiphase. The lattice parameters increase with elevated Nd and Ce content. The grains are densely packed on each other with cube-like shape, and the elements are almost homogeneously distributed in the compound. This synthetic method provides a simple pathway for the preparation of highly densified single phase ceramic at 1600–1700 ℃ for 3 min under pressure of 80 MPa.
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2018
·
IF 3.141
Yuan Cai,Xiaofeng Xu,Hu Wang,Lei Wang,Lulu Chen,Rui Li,Jing Ding,Hui Wan,Guofeng Guan
Production of alternative, clean aviation fuel from biomass synthesis gas via Fischer–Tropsch (FT) synthesis has attracted much attention. In this paper, Al-SBA-15 supported cobalt catalysts with different Al/Si ratios were successfully prepared for the production of aviation fuel by FT synthesis. The physical and acidic properties of the Co/Al-SBA-15 catalysts were characterized by XRF, XRD, N2 adsorption–desorption, TEM, H2-TPR, 27Al NMR, NH3-TPD, and Py-FTIR. The formation of long-chain hydrocarbons was inhibited by the ordered mesoporous structure. Fischer–Tropsch activity and selectivity were demonstrated to be affected by the acidity of the Al-SBA-15 supports. The selectivity turned to lighter iso-paraffin products. Co-based catalyst with Al/Si ratio of 0.01 exhibited the highest selectivity (52.4%) for aviation fuel (C8–C18 products) and much higher ratio of iso-paraffin/normal-paraffin (iso/n) (20.2%). This study might provide useful information for the selective production of aviation fuel via FT synthesis.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Xiaotong Cao,Jianquan Luo,John M. Woodley,Yinhua Wan
In this study, the biocatalytic membranes were prepared by ‘reverse filtration’ of laccase and subsequently various mussel-inspired coating strategies: single dopamine (DA) deposition, DA/polyethyleneimine (PEI) co-deposition, and DA/Cu 2+ co-deposition, where nanofiltration (NF) membranes were used as the matrix to further exploit the potential of the biocatalytic membranes. Such prepared biocatalytic membranes were enzymatically active on both sides, making it possible to construct a bifacial enzymatic membrane reactor (EMR) for highly efficient micro-pollutants removal (taking bisphenol A (BPA) as an example). Compared with the single polydopamine (PDA) coated membrane, the biocatalytic membranes prepared by DA/PEI and DA/Cu 2+ co-depositions exhibited much better performances in terms of enzyme loading, activity and permeability as well as the stability of immobilized enzyme. The BPA removal efficiency was highest for the EMR with the PDA/Cu 2+ coated membrane attributed to copper-enhanced electron transfer, while it was lowest for the EMR with the PDA/PEI coated membrane due to the high diffusional resistance of the dense PDA/PEI layer. Meanwhile, the mechanism for performance deterioration of biocatalytic membrane during BPA treatment was revealed, and it was found that the trade-off between BPA removal efficiency and long-term stability could be broken by applying the bifacial EMR with PDA/Cu 2+ coated membrane in flow-through mode, since the pressure-induced convective mass transfer improved the substrate accessibility to enzyme together with products removal.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry B
·
2018
·Vol. 6
·期 15
·2217-2229
·
IF 4.776
Shengnan Huang,Ying Liu,Xin Xu,Mengfei Ji,Yuanmin Li,Chengjun Song,Shaofeng Duan,Yurong Hu
A combination of different therapy strategies has great potential to efficaciously treat malignant tumors, by virtue of their synergetic effects. Herein, a co-delivery system based on gold nanocages (AuNCs) was designed to deliver both doxorubicin (DOX) and microRNA-122 mimic (miR-122) for an enhanced cancer therapy. DOX was loaded into the AuNCs and miR-122 was condensed onto the surface of the functionalized AuNCs by an electrostatic interaction. Polyethyleneglycol (PEG) and hyaluronic acid (HA) were also introduced to the co-delivery system for targeted drug delivery. We evaluated the cellular uptake, biodistribution and anti-tumor effect in vitro and in vivo. Our results demonstrated an effective delivery of DOX and miR-122 into tumor cells and the tumor tissue. Importantly, the triple therapy, namely the combination of chemotherapy, gene therapy and photothermal therapy, mediated by this multifunctional drug delivery system, exhibited better anti-tumor effect than any single therapy, both in vitro and in vivo. Additionally, this drug delivery system caused insignificant toxicity to the major organs and had no obvious effect on the body weight of the mice. It could be concluded that multifunctional AuNCs are promising as a co-delivery vector for an enhanced anti-tumor effect.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Canyu Cui,Shihui Jiao,Wenwen Wang,Guangsheng Pang
It is essential to synthesize a versatile organic solvent/water separation material with excellent stability and durability. Superwetting materials, known for their multiple practical functionalities in everyday life and industrial production, have been receiving special concern for years. In this paper, the multifunctional superhydrophobic surface has been successfully prepared by coating polydimethylsiloxane (PDMS) onto three-dimensional nest-like Co-Ni layered double hydroxides (LDHs) using fabrics as a substrate (N Co-Ni LDHs/PDMS). The hierarchical nest-like structure of Co-Ni LDHs promotes the formation of abundant air cushions and enhances self-cleaning ability under liquid, which is beneficial to the efficient separation of organic solvent/water mixture. The results fabrics (superhydrophilic N Co-Ni LDHs and superhydrophobic N Co-Ni LDHs/PDMS) exhibit a high separation efficiency of 99.1 % and a flux of 11400 L m −2 h −1 for n-hexane, kerosene, cyclohexane, tetrachloroethylene and tetrachloromethane. The separation efficiency is above 99.0 % and flux is above 10200 L m −2 h −1 after 10 cycles of separation. The superhydrophobic N Co-Ni LDHs/PDMS can load 21 times its own weight and sail on water at a velocity of 60 cm s −1 . Additionally, the superhydrophobic fabrics display excellent chemical stability and mechanical durability. The as-fabricated fabrics are suitable for application in organic solvent/water separation.
✓ 已验证
产品关联
DOI
高影响因子
Advanced Sustainable Systems
·
2024
·Vol. 8
·期 12
·2400419
·
IF 6.5
Dongxu Han,Zhi Song,Boxia Liu,Bofei Liu,Xiayan Zhang,Jialu Liu,Yeqiong Huang,Chuhan Xing
Because of its excellent catalytic activity and stability, perovskite materials are widely used in advanced oxidation processes to remove refractory organic pollutants. In this study, a series of catalysts Pr 0.6 Sm 0.4 Co x Mn 1-x O 3 (x = 0, 0.2, 0.4, 0.5, 0.6,0.8 and 1) with limited range effect are prepared by sol–gel method with the regulation strategy of injecting active metal Co at B site in the crystal lattice of perovskite catalyst Pr 0.6 Sm 0.4 MnO 3 . Under the optimal conditions, the Pr 0.6 Sm 0.4 Co 0.8 Mn 0.2 O 3 /PMS/RhB system showed superior catalytic performance, and the removal rate of Rhodamine B (100 mg L −1 ) is close to 100% within 40 min. In addition, the Pr 0.6 Sm 0.4 Co 0.8 Mn 0.2 O 3 catalyst has a wider pH (2-10) tolerance range and still has outstanding catalytic properties after multiple cycle tests. The quenching experiment and EPR test confirmed that a variety of active species are produced in the system, and the singlet oxygen as the leading path of a variety of active substances assisted to promote the efficient degradation of Rhodamine B in wastewater. This study provides a new reaction system and regulatory strategy of active structural sites for the design of Fenton-like catalytic systems based on novel perovskite oxides.
✓ 已验证
产品关联
DOI
高影响因子
CATALYSIS TODAY
·
2024
·
IF 5.2
Ruiqi Wu,Ning Liu,Chengna Dai,Gangqiang Yu,Ruinian Xu,Biaohua Chen
The propane oxidation dehydrogenation assisted by CO 2 (CO 2 -ODHP) is currently a hot research topic, not only to meet growing demand of propylene but also to favor the CO 2 neutralization. In present work, a series of CrO x @S1-n-1.0 with different Cr contents (n= 2.2, 3.6 and 4.5 wt%) is synthesized based on a small gas molecule directing synthesis strategy, wherein the gaseous CO of 1.0 MPa was in situ introduced in the synthesis system to regulate the interaction and dispersion of CrO x over silicalite-1 (S1) support. The characterization results of XRD , XPS , H 2 -TPR, and Raman indicate that the CO can affect the oxidation state and dispersion of Cr species. As observed, the Cr species were highly dispersed over CrO x @S1–3.6 %-1.0 (in the form of Cr 6+ valance state), which however would aggregate to generate Cr 2 O 3 nanoparticles over the CrO x @S1–3.6 %-0 a prepared by impregnation method in absence of CO. The activity measurement indicates that the CrO x @S1–3.6 %-1.0 possesses the highest activity by displaying an average propane conversion of 50.4 % and CO 2 conversion of 23.6 % at 600 °C, which surpasses most of the literature reports. The CO 2 -ODHP reaction mechanism was further investigated by in situ DRIFTS , which indicates that dissociated H of propane can react with CO 2 to form formate (-COOH), in turn further reacts with H to produce byproducts CO and H 2 O, and the formate species can also react with the CrO 3 active site to form bicarbonate species (HCO - 3 ). Generally, present work has proposed a small gas molecule directing strategy to adjust the dispersions and chemical states of the loaded guest meals over catalytic support. The study of present work would contribute to other highly efficient catalyst design .
✓ 已验证
产品关联
DOI
高影响因子
BIOORGANIC CHEMISTRY
·
2024
·
IF 4.5
Dong Wu,Yamei Lin
Up to now, the biocatalytic activity of nanozymes has been extensively studied, while little research focus on their inhibitory behaviors. Here, Co-based carbon material (Co-DMOF) containing abundant carboxylic acid groups was prepared, with defects introduced by COx escape during pyrolysis to achieve controllable activity. As a result, Co-DMOF exhibited biocatalytic activity similar to cytochrome P450 3A4 (CYP3A4) in the metabolism of 1,4-Dihydropyridine (1,4-DHP, a calcium channel blocker). Excitingly, studies on IC 50 and drug-drug interaction (DDI) suggested that Co-DMOF had similar inhibitory behaviors to CYP3A4. Moreover, Co-DMOF displayed excellent stability even under high temperature (100 °C), organic solvents, and a wide range of pH (4–9). Additionally, it can be reused for at least 7 times with only slight loss of activity. Therefore, Co-DMOF has great potential to become a low-cost alternative to CYP3A4 for drug dosage guideline, drug metabolism and DDI. This work provides more possibilities for expanding the CYP3A4-like nanozyme library.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Scientific Reports
·
2024
·Vol. 14
·期 1
·1-15
·
IF 3.8
Yue Jiayuan,Zheng Qi,Ding Shushu,Yin Yujian,Zhang Xiaodan,Wang Liyun,Gu Yipeng,Li Jiejia,Zhang Yuhan,Shi Yurou,Dong Yuetan,Zhu Qing,Duo Huixiao
In this study, the removal effect of a new MOF-on MOF adsorbent based on Cu–Co bimetallic organic frameworks on tetracycline antibiotics (TCs) in water system was studied. The adsorbent (Cu-MOF@Co-MOF) were synthesized by solvothermal and self-assembly method at different concentrations of Co 2+ /Cu 2+ . The characterization results of SEM, XRD, XPS, FTIR and BET indicated that the MOF-on MOF structure of Cu-MOF@Co-MOF exhibited the best recombination and physicochemical properties when the molar ratio of Co 2+ : Cu 2+ is 5:1. In addition, the Cu-MOF@Co-MOF have a high specific surface area and bimetallic clusters, which can achieve multi-target synergistic adsorption of TCs. Based on above advantages, Cu-MOF@Co-MOF provided a strong affinity and could efficiently adsorb more than 80% of pollutants in just 5 to 15 min using only 10 mg of the adsorbent. The adsorption capacity of tetracycline and doxycycline was 434.78 and 476.19 mg/g, respectively, showing satisfactory adsorption performance. The fitting results of the experimental data were more consistent with the Langmuir isotherm model and pseudo-second-order kinetic model, indicating that the adsorption process of TC and DOX occurred at the homogeneous adsorption site and was mainly controlled by chemisorption. Thermodynamic experiments showed that Cu-MOF@Co-MOF was thermodynamically advantageous for the removal of TCs, and the whole process was spontaneous. The excellent adsorption capacity and rapid adsorption kinetics indicate the prepared MOF-on MOF adsorbent can adsorb TCs economically and quickly, and have satisfactory application prospects for removing TCs in practical environments. The results of the study pave a new way for preparing novel MOFs-based water treatment materials with great potential for efficient removal.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Omega
·
2024
·
IF 3.7
Qi Tao,Hang Yao,Feifei Wang,Zehao Gu,Xiaofei Yang,Yuchi Zhao,Huan Pang,Dong-An Wang,Hui Chong
Ulcerative colitis (UC) is a chronic inflammatory bowel disease characterized by the disruption of the intestinal epithelial barrier. This study described the synthesis and characterization of CCM-Co-ZIF-8, a novel composite material with enzyme-like activities similar to catalase, peroxidase, and superoxide dismutase. CCM-Co-ZIF-8 demonstrated the ability to scavenge reactive oxygen species that play a critical role in UC pathogenesis. In vitro studies using lipopolysaccharide-induced RAW264.7 cells showed that CCM-Co-ZIF-8 exhibited anti-inflammatory activity by promoting the transition of macrophages from an M1 to an M2 phenotype. In vivo experiments using a mouse model of UC demonstrated that CCM-Co-ZIF-8 suppressed the expression of proinflammatory cytokines. These findings suggested that CCM-Co-ZIF-8 might hold promise as a therapeutic strategy for the treatment of UC.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Water Process Engineering
·
2024
·
IF 6.3
Weiwei Zhang,Su Xu,Yuanjin Zhao,Huan Chen,HuaYing Li,Han Liu
Sulfamethazine (SMT), a sulfonamide antibiotic, is widely present in medical wastewater and is one kind of refractory organic pollutants that endanger the water environment. An efficient and environmentally friendly degradation method is crucial for treating antibiotic wastewater. Based on the strong activation capability of transition metal ions for peroxymonosulfate (PMS) and highly affinity of MoS 2 towards PMS, the decoration of MoS 2 with transition metal ions would be an effective activation of PMS for degradation of organic pollutants. In this work, Co@MoS 2 was synthesized by hydrothermal method and used as catalyst for the degradation of SMT with PMS. Almost 100 % of sulfamethazine (SMT) was removed within 10 min. The EPR and quenching experimental results suggested that 1 O 2 was the main active species for SMT degradation in the Co@MoS 2 /PMS system. The accelerated valence cycle between Co 2+ and Co 3+ was the key factor to PMS activation and SMT degradation. Further, the Co@MoS 2 /PMS system showed good applicability to different pollutants, excellent reusability for SMT removal. Therefore, the results demonstrated that the present study process was a promising strategy for antibiotic removal.
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2025
·
IF 12.1
Min Zhu,Ting Zhang,Jinlong Wu,Xiuli Wang,Jin Zhang,Feng Li,Jing Li
Lattice strain is widely recognized as an effective strategy for tuning transition metal catalytic activity, yet its direct impact on electrochemical CO₂ reduction (ECO₂RR) remains not fully understood. In this work, a strategy of Cu-doped Ag is employed to construct a series of AgCu nanosheet structures (NS) with varying lattice compression rates (from −1.90% to −2.75%). Density Functional Theory (DFT) calculations, along with in situ infrared spectroscopic analysis, demonstrate that Cu incorporation efficiently modulates the electronic structure of Ag, promoting enhanced charge transfer. Especially, the changed lattice compression rates can alter the charge density at adsorption sites, thereby ameliorating the surface coverage of CO and adsorption energy of the reaction intermediates ( * COOH and * CO). As a result, the AgCu 5% catalyst exhibits a maximum Faradaic efficiency (FE) of 95.5% for CO production in an H-cell and 98% in a flow cell at −0.8 V RHE , respectively. Simultaneously, the AgCu 5% catalyst achieves FE CO of above 86% in the ultrawide current range of 33–215 mA cm −2 . The work affords an effective way to use a strain compression strategy to improve the CO 2 reduction performance.
✓ 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）