Petroleum Science
·
2024
·
IF 6
Wei-Peng Wu,Min Yang,Dong-Chen Ma,Ji-Rui Hou,Tuo Liang,Ming Qu,Tao Tan,Biao Yang,Guo-Rui Ma
In-depth profile control is a crucial technique employed to enhance oil recovery in fractured-vuggy carbonate reservoirs. However, it is a challenge to achieve in-depth profile control. In this paper, two types of organic gel systems, namely s-MPG and MSRG, tailored for fractured-vuggy reservoirs with 140 °C and 22 × 10 4 mg/L have been developed. FTIR was used to analyze the functional groups of s-MPG and MSRG. Additionally, the quality retention rates of s-MPG and MSRG were assessed using TG-DSC, yielding results of 92.85% and 92.65%, respectively. The dilution rates of s-MPG and MSRG are found to be 18.69% and 26.69%, respectively, demonstrating excellent compatibility and adaptability. The enhancement performance depends on the synergistic effect that the anti-dilution s-MPG effectively separates bottom water, while high-strength MSRG separates the oil layer. Moreover, the EOR performances of s-MPG synergy with MSRG in various types of fractured-vuggy carbonate models were also evaluated. The highest oil recovery of 12% is achieved in fracture network model. Laboratory results indicate that the synergistic combination of s-MPG and MSRG for water plugging in fractured-vuggy carbonate reservoirs results in a more effective enhancement of oil recovery compared to using a single gel system for plugging. Finally, the s-MPG synergy with MSRG has been applied in actual fractured-vuggy carbonate reservoirs. As expected, the water cut of typical well is reduced from 100% to 30% and the increased oil production is 1142 t totally. Therefore, this study presents a novel approach to achieving in-depth profile control by leveraging the synergistic effect of s-MPG with MSRG in fractured-vuggy carbonate reservoirs.
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DOI
高影响因子
Molecular Catalysis
·
2024
·
IF 3.9
Qiao Liu,Meirong Kang,Weiguo Fang,Hailong Liu,Zhiwei Huang
A novel quaternization reagent of (1E,1′E)-1,1′-(1,4-phenylene)bis(N-(3-(1H-imidazol-1-yl)propyl)methanimine) (PP) was synthesized and used for the preparation of a series of poly(ionic liquid)s (PILs) via the quaternization reaction. These PILs were subsequently loaded with polyoxometalates (POMs) to create innovative catalysts for the oxidation of alkenes. Comprehensive structural analysis of the catalysts showed that these PILs exhibited a high loading amount ratio of up to 542 % for POMs, which were well-dispersed on the surface of PILs. The PILs loaded POMs catalysts, especially for PW-PIL-TB-2PP with H 3 PW 12 O 40 as the POMs, displayed remarkable activity and stability in oxidizing cyclooctene, achieving a conversion rate of 97 % and a selectivity of 99 % for 1,2-epoxycyclooctane over six consecutive runs without notable loss. Furthermore, the PW-PIL-TB-2PP catalyst could also be used for the oxidation of a wide range of cyclic, linear, and aromatic alkenes.
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高影响因子
CATALYSIS COMMUNICATIONS
·
2019
·
IF 3.674
Yuanmei Wen,Liaotian Peng,Yang Zhou,Tao Peng,Yu Chen,Xiaoling Cheng,Yongzheng Chen,Jiawei Yang
Here we report a methionine sulfoxide reductase B (MsrB) enzymatic system for the preparation of ( S )-sulfoxides through kinetic resolution of racemic ( rac ) sulfoxides. Eight MsrB homologue recombinant proteins were expressed and their activities on asymmetric reduction of rac -sulfoxides were analyzed. Among these MsrB homologue proteins, one protein from Acidovorax species showed good activity and enantioselectivity towards several aryl-alkyl sulfoxides. The ( S )-sulfoxides were prepared with 93–98% enantiomeric excess through kinetic resolution at initial substrate concentration up to 50 mM. The establishment of MsrB catalytic kinetic resolution system provides a new efficient green strategy for preparation of ( S )-sulfoxides.
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DOI
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2025
·
IF 6.2
Rong Tian,Jia-Xin Li,Naihao Lu
Bisphenol S (BPS), a common replacement for bisphenol A (BPA) in packaging and food containers, has posed a threat to human health through dietary consumption. In this study, the effects of BPS binding on the redox states and stabilities of hemeproteins were investigated. Spectroscopy and molecular docking indicated that BPS could cause conformational alterations of hemoglobin (Hb) and the conversion of ferrous Hb to ferric Hb, which subsequently led to increased liberation of free hemin. Next, free hemin significantly caused cell membrane damage, reactive oxygen species formation, lipid peroxidation, and a decline of cell viability in endothelial cells. The selective inhibitors of ferroptosis significantly suppressed hemin-induced toxicity, indicating a hemin-mediated ferroptotic cell death mechanism. Our findings illustrate the binding mechanism of BPS with the hemeprotein as well as the cytotoxicity, which have important implications for the environmental and human health impacts of BPA replacements.
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产品关联
DOI
PubMed
高影响因子
Theranostics
·
2019
·
IF 8.063
Xiaolong Zhang,Guangming Li,Yichen Guo,Ying Song,Linlin Chen,Qinli Ruan,Yifan Wang,Lixia Sun,Yunfeng Hu,Jingwen Zhou,Bin Ren,Jun Guo
Cancer invasion and metastasis depend on accurate and rapid modulation of both chemical and mechanical activities. The S-nitrosylation (SNO) of membrane cytoskeletal cross-linker protein ezrin may regulate the malignant process in a tension-dependent manner. Methods : The level of nitrosylated ezrin in non-small cell lung cancer (NSCLC) tissues and A549 cell line were evaluated by biotin-switch assay. A few cysteine mutated plasmids of ezrin were used to identify active site for SNO. Newly designed ezrin or mutated-ezrin tension probes based on Förster resonance energy transfer (FRET) theory were applied to visually observe real-time tension changes. Cytoskeleton depolymerizing and motor molecular inhibiting experiments were performed to reveal the alternation of the mechanical property of ezrin after SNO. Transwell assays and xenograft mouse model were used to assess aggressiveness of A549 cells in different groups. Fluorescent staining was also applied to examine cellular location and structures. Results : High inducible nitric oxide synthase (iNOS) levels were observed to induce ezrin-SNO, and then promote malignant behaviors of NSCLC cells both in vitro and in vivo. Cys 117 was identified as the only active site for ezrin-SNO. Meanwhile, an increased level of ezrin tension was observed after iNOS-induced SNO. Enhanced ezrin tension was positively correlated with aggressiveness of NSCLC. Moreover, Microfilament (MF) forces instead of microtubule (MT) forces played dominant roles in modulating ezrin tension, especially after ezrin nitrosylation. Conclusion : This study revealed a SNO-associated mechanism underlying the mechanical tension of ezrin. Ezrin-SNO promotes NSCLC cells invasion and metastasis through facilitating mechanical transduction from the cytoskeleton to the membrane. These studies implicate the therapeutic potential by targeting ezrin in the inhibition NSCLC invasion and metastasis.
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PubMed
高影响因子
Small
·
2023
·Vol. 20
·期 13
·2308743
·
IF 13.3
Hui Yang,Lu Jia,Qitao Zhang,Saisai Yuan,Teruhisa Ohno,Bin Xu
Long-term exposure to low concentration indoor VOCs of acetaldehyde (CH 3 CHO) is harmful to human health. Thus, a novel isogenous heterojunction CeO 2 /Ce-MOF photocatalyst is synthesized via a one-step hydrothermal method for the effective elimination of CH 3 CHO in this work. This CeO 2 /Ce-MOF photocatalyst performs well in CH 3 CHO removal and achieves an apparent quantum efficiency of 7.15% at 420 nm, which presents ≈6.7 and 3.4 times superior to those generated by CeO 2 and Ce-MOF, respectively. The enhanced efficiency is due to two main aspects including i) an effective photocarrier separation ability and the prolonged reaction lifetime of excitons play crucial roles and ii) the formation of an internal electric field (IEF) is sufficient to overcome the considerable exciton binding energy, and increases the exciton dissociation efficiency by up to 50.4%. Moreover, the reasonable pathways and mechanisms of CH 3 CHO degradation are determined by in situ DRIFTS analysis and simulated DFT calculations. Those results demonstrated that S-scheme heterojunction successfully increases the efficiency of harmful volatile organic compounds elimination, and it offers essential guidance for designing rare earth-based MOF photocatalysts.
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高影响因子
REACTIVE & FUNCTIONAL POLYMERS
·
2019
·
IF 3.074
Lijia Liu,Yaodong Wang,Fuqingyun Wang,Chunhong Zhang,Yanli Zhou,Zhengjin Zhou,Xudong Liu,Ruiqi Zhu,Hongxing Dong,Toshifumi Satoh
One-handed helical substituted polyacetylene has received extensive attention due to its potential in chiral stationary phases and molecular recognition . Here, three one-handed helical poly(phenylacetylene)s bearing proline or proline dipeptide as the pendants ( PPA-Pro, PPA-Pro-Pro and PPA-Pro-Hyp ) were synthesized. As the catalyst, the three helical polymers separately catalyzed the asymmetric aldol reaction of acetone with p -nitrobenzaldehyde in a various media. The results indicate that PPA-Pro-Pro and PPA-Pro-Hyp bearing dipeptide pendants showed the higher catalytic activity and enantioselectivity than the PPA-Pro bearing proline pendants and the corresponding monomer catalysts. This indicates the synergistic effect of the dipeptide pendants with the one-handed helical mainchain of the polymer catalyst. The polymer catalysts can be recycled and maintain the catalytic performance after four circles. When imidazole was added to the reaction system, the reaction yield could be efficiently improved without affecting the enantioselectivity.
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Minhui Zheng,Yang Liu,Qiang Ru,Jun Zhang,Zikang Pan,Yuqing Gao,Francis Chi-Chung Ling,Li Wei
The mesh-like hard carbon loaded SbPO 4 (SbPO 4 /NTC) was harvested and employed as anode material for sodium ion batteries. Profiting from prominent capacitance, porous structure, and sufficient buffering space, the composite realizes high electrochemical kinetics for sodium ion storage. The SbPO 4 /NTC composite gains impressive battery properties, such as high discharge capacity of 413.7 mAh g −1 under 0.5 A g −1 after 200 cycles and conspicuous rate performance of 365.7 mAh g −1 even at 6 A g −1 . In addition, the composite demonstrates a wide operation-temperature window with favorable capacities of 194.3–397.6 mAh g −1 from −10 °C to 60 °C at 0.1 A g −1 . The phase transition and sodium storage mechanism are elucidated by density functional theory (DFT) calculation. Therefore, the SbPO 4 /NTC composite has a great potential for high-efficient sodium ion storage.
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DOI
高影响因子
Journal of Materiomics
·
2024
·
IF 8.4
Huili Ran,Xue Liu,Jiajie Fan,Yun Yang,Lijie Zhang,Qin Guo,Bicheng Zhu,Quanlong Xu
The construction of heterojunction is an effective way to promote the photoinduced charge carrier separation in spatial, thus accelerating the photocatalytic reaction. However, the regulation of interface properties, as a crucial factor in affecting the charge carrier diffusion process, still remains a significant challenge. In this work, BiOBr/TpBD-COF heterojunction was successfully constructed via a novel phase transformation strategy. Specifically, perovskite Cs 3 Bi 2 Br 9 was first synthesized and then in-situ transformed into BiOBr during the preparation of TpBD-COF procedure, thus obtaining BiOBr/TpBD-COF heterojunction with favorable interface. According to the in-situ X-ray photoelectron spectroscopy (XPS) characterization and electron paramagnetic resonance (EPR) analysis, the photogenerated electrons with weak reduction power transfer from BiOBr to TpBD-COF driven by the internal electric field under irradiation, conforming S-scheme charge transfer mode. As a result, the photogenerated electrons and holes with strong redox abilities are spatially located on TpBD-COF and BiOBr surface, respectively, endowing the strong driving force toward the water splitting reaction. The optimized 10%BiOBr/TpBD-COF displayed remarkably enhanced photocatalytic hydrogen evolution rate (16.17 mmol·g −1 ·h −1 ) in comparison with TpBD-COF (5.18 mmol·g −1 ·h −1 ). This study will provide some novel inspirations for developing efficient COF-based S-scheme heterojunction photocatalysts.
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高影响因子
GREEN CHEMISTRY
·
2014
·Vol. 16
·期 6
·3142-3148
·
IF 6.852
Hui Zheng,Xianting Cao,Kui Du,Jun Xu,Pengfei Zhang
The highly efficient transformation of CX2 (O, S) into valuable chemicals at atmospheric pressure is an attractive topic. A novel method of preparing quinazoline derivatives by capturing CX2 (O, S) in reusable, room-temperature, reversible ionic liquids (ReILs) with high yields (up to 98%) at 40 °C and atmospheric pressure was developed in this paper. The different reaction conditions were optimized and the products were easily separated from the ReILs which could be reused at least six times without considerable loss in yield. The plausible mechanism of capturing CX2 (O, S) in the ReILs was proposed and it provides a green, efficient protocol to capture CX2 (O, S) in ReILs to synthesize quinazoline derivatives.
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高影响因子
RSC Advances
·
2019
·Vol. 9
·期 11
·6221-6227
·
IF 3.049
Nuo Ji,Guang Hu,Jianbo Li,Jie Ren
The influence of the addition of linear and four-arm poly(lactide) (PLA) stereocomplexes (scPLAs) on the non-isothermal and isothermal crystallization behavior of poly(L-lactide) (PLLA) and poly(D-lactide) (PDLA) from the molten state was investigated. The linear PLAs and four-arm PLA with a similar chain length for each arm were synthesized by ring-opening polymerization. The linear and four-arm scPLAs were then prepared by solution blending and characterized by 1H-NMR, FTIR, and WAXD analysis. Various mass ratios of the scPLAs were subsequently added to PLLA and PDLA as nucleating agents and specimens were prepared by solution casting. The isothermal and non-isothermal crystallization behavior of the specimens was examined by differential scanning calorimetry and polarized optical microscopy. The SC crystallites effectively promoted the nucleation of the PLAs, thereby increasing the general crystallization rate of the matrix. A 10% content of stereocomplex nucleating agent increased the crystallization rate of PDLA and PLLA by more than 55% and 70%, respectively. Compared with the linear scPLA, the four-arm scPLA more strongly promoted crystallization at higher temperatures. This might be because the greater degree of branching and larger steric hindrance of the four-arm scPLA led to the formation of defective SC crystallites, which was more beneficial for adsorption of the matrix on the crystal surface and permitted the nucleation and growth at higher temperatures. These results demonstrate that scPLAs can potentially be used as nucleating agents to improve the performance and transparency of PLA films.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Aihui Chen,Haoran Ji,Zhifeng Xu,Ziyi Wang,Haijiao Xie,Lei Zhang
Perfluorinated compounds (PFCs), recognized as persistent organic pollutants, resist degradation in the environment due to the high bond energy of the C–F. Increasing carrier density via adopting electrostatic self-assembly strategy has been shown to effectively cleave C–F bonds. In this work, a unique S-scheme structure was fabricated by combining oppositely charged semiconductors, TiO 2 and ReS 2 , through electrostatic self-assembly. The resulting 2 % ReS 2 -TiO 2 composite achieved a photodegradation efficiency of 98 % for perfluorooctanoic acid (PFOA), considerably higher than the 62 % efficiency observed for pure TiO 2 . Additionally, the 2 % ReS 2 -TiO 2 composite demonstrated broad applicability for the removal of other PFCs. The introduction of ReS 2 , with a lower work function than TiO 2 , could generate an internal electric field (IEF) to facilitate electron transfer from TiO 2 to ReS 2 under continuous irradiation and thereby enhance charge separation efficiency.
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高影响因子
危险品化学品经营许可证（带存储）