FUEL PROCESSING TECHNOLOGY
·
2019
·
IF 4.507
Xiaoping Wu,Qiao Zhang,Lungang Chen,Qiying Liu,Xinghua Zhang,Qi Zhang,Longlong Ma,Chenguang Wang
The development of thermally stable Pt-based catalysts with superior performance for propane dehydrogenation reactions remains a daunting challenge. In this study, a series of PtSn-Mg(Zn)AlO catalysts with different Zn and Pt contents were synthesized by the anion-exchange method for the propane dehydrogenation reaction. To investigate the influence of Zn on the reaction performance and the catalyst structure, the prepared catalysts were characterized with several analytical techniques, including XRD , TEM, HRTEM, H 2 -TPD and CO pulse chemisorption . A good propane conversion (initially higher than 55% and averaging 45.2% over a period of 2 h) and propene selectivity (higher than 99%) were obtained experimentally with PtSn-Mg(3Zn)AlO at 550 °C. The results demonstrated that Pt provided the active sites and that Zn was a promoter. The HRTEM and CO pulse chemisorption results indicated that the addition of Zn to the PtSn-MgAlO catalyst can stabilize the dispersion of metal particles and thus inhibit the sintering of Pt particles. Furthermore, the activities of the used catalysts were almost recovered through reaction-regeneration cycles with the burning-off of coke during five cycles.
研究领域:
催化
·
化工
·
材料科学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Temitope Fausat Ajibade,Huali Tian,Kayode Hassan Lasisi,Qiang Xue,Weihao Yao,Kaisong Zhang
Despite advances in membrane technology, the separation of complex oily wastewater using membrane filtration remains a daunting challenge for the industry. Recent approaches including membrane modification with two-dimensional (2D) nanosheets, showed susceptibility to swelling, fouling, and instability during operation. As a game-changer approach, a polyacrylonitrile (PAN) UF membrane modified with 3D nanostructured composite of MXene and O-MWCNT was introduced for the first time to treat complex oily wastewater. The composite membrane showed high separation performance of soluble dye-oil-water emulsion while maintaining high water permeability. Moreover, during the operational period, the composite membrane exhibits excellent antifouling and anti-swelling properties due to the synergetic effects conferred by the 3D nanostructures. Furthermore, the composite membrane possesses remarkable chemical stability evidenced by its high corrosion resistance when exposed to a strong acid (3 M HCl) and oxidant (NaOCl) solution for a long-time period. Overall, the operational stability was maintained in terms of flux and high rejection of oil and dye over a 45 h long-term operation. Consequently, this work provides an innovative, stable, and highly facile process for fabricating scalable UF composite membrane for the treatment of complex oily wastewater in a harsh chemical environment.
研究领域:
环境工程
·
膜技术
·
废水处理
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Qibing Wang,Luman Liu,Jianlong Wang,Wanjing Luo,Ren Wang,Lili Chen,Jinsheng Sun,Jie Yang,Huicui Sun,Fulong Peng,Jianhua Guo
Deep and ultra-deep drilling operations face significant challenges such as high temperatures and salinity levels. Drilling fluids are prone to failure under these conditions, causing increased filtration loss and frequent downhole accidents. To address these critical issues, this study utilised the high-temperature-stable adsorption properties of siloxanes to synthesise a multi-target adsorption-type fluid filtrate reducer, PFS-1. The molecular structure and thermal stability of PFS-1 were characterised using 1 H NMR, Fourier transform infrared spectroscopy and thermogravimetric analysis. Its effects on the microstructure of drilling fluid were investigated using scanning electron microscopy, X-ray diffraction and zeta potential analysis, thereby elucidating the interaction mechanism between PFS-1 and clay particles. Experimental results demonstrate that PFS-1 possesses excellent thermal stability, with a decomposition onset temperature exceeding 318°C. After thermal ageing at 240°C for 16 h and 72 h, the filtration loss of drilling fluid containing 2 wt% PFS-1 was 9.1 mL and 9.7 mL, respectively. Additionally, in a 15 wt% NaCl brine-based drilling fluid system, the API filtration loss was just 5.6 mL after ageing at 220°C with 2 wt% PFS-1. Results confirm the superior high-temperature resistance and salt tolerance of the novel filtration reducer. Through the synergistic effect of Si–O–Si chemical adsorption and ionic bonding, PFS-1 forms a stable multi-point adsorption on the surface of the clay particles, inhibiting their hydration and aggregation and thereby reducing the fluid filtration loss. Furthermore, the performance of PFS-1 was improved by 18.75 % compared to that of commercial products, indicating its strong potential for application in demanding drilling environments characterised by ultra-high temperatures and high salinity.
研究领域:
石油工程
·
材料科学
·
化学工程
·
应用化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SEPARATION SCIENCE
·
2022
·Vol. 45
·期 15
·3054-3062
·
IF 3.614
Qin Lei,Abduh Murshed,Anthony Chukwunonso Ogbuehi,Qian Peng,Yiqing Zhang,Fenyong Sun,Qi Zhong,Lei Jin,Hao Wang
Phosphorylation is one of the most important protein post-translational modifications, which possesses dramatic regulatory effects on the function of proteins. In consideration of the low abundance and low stoichiometry of phosphorylation and non-specific signal suppression, efficient capture of the phosphoproteins from complex biological samples is critical to meet the need for protein profiling. In this work, a facile preparation of titanium (IV)-immobilized O-phospho-L-tyrosine modified magnetic nanoparticles was developed for the enrichment of intact phosphoproteins. The prepared magnetic nanoparticles were characterized by various instruments and had a spherical shape with an average diameter of 300 nm. The adsorption isotherms were investigated and the maximum capacity for β-casein was calculated to be 961.5 mg/g. Standard protein mixtures and biological samples (non-fat milk and human serum) were selected to test the enrichment performance. Sodium dodecyl sulfate-polyacrylamide gel electrophoresis analysis demonstrated the excellent enrichment performance with high selectivity. With the superparamagnetic property, titanium (IV)-immobilized O-phospho-L-tyrosine modified magnetic nanoparticles were convenient for the practical application and clinical promotion, thus having a promising prospect in the field of phosphoprotein research.
研究领域:
生物化学
·
蛋白质组学
·
纳米技术
·
分析化学
✓ 已验证
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Xuan Xuan,Shuang Meng,Guozhe Sui,Ning Liu,Dongxuan Guo,Dantong Zhang,Xue Yang,Yue Li,Jinlong Li
The rational design of solid-solution-oxide heterostructure presents a promising pathway to synergize band structure engineering and interfacial charge dynamics in advanced photocatalysis. Herein, a novel S-scheme CeZnO/ZnO heterojunction was fabricated through solid-solution lattice engineering, where Ce-O-Zn covalent bonding networks are strategically constructed at phase boundaries via controlled exceedance of the Ce solubility limit in ZnO matrix. Coupled with Ag nanoparticle-induced localized surface plasmon resonance (LSPR), this hierarchical system achieves remarkable visible-light-driven tetracycline (TC) degradation (90.4 % within 60 min). The outstanding degradation performance can be attributed to the formation of a built-in electric field at the Ce-O-Zn interface, the presence of oxygen vacancies, and the synergistic catalytic effect of Ag nanoparticles. Density functional theory (DFT) calculations and experimental characterizations further reveal that the CeZnO/ZnO heterojunction facilitates S-scheme charge transfer via Ce-O-Zn bonds, improving charge transfer and separation efficiency while preserving the strong redox capability of photo-generated charge carriers. This study provides valuable insights into the design of high-performance heterojunction photocatalysts and carries significant implications for the development of photocatalysis.
研究领域:
材料科学
·
物理化学
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环境催化
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纳米材料
·
光催化
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表面科学
·
半导体异质结
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Guo Liu,Shuhao Tian,Chang Li,Yizhi Li,Zhiming Deng,Zhijun Zou,Jiayou Tao,Kun Tao,Hongcen Yang,Xiaoxiang Sun,Fen Li,Erqing Xie,Zhenxing Zhang
Catalytic conversion of polysulfides is regarded as a crucial approach to overcome the chronic challenges from polysulfides shuttling and sluggish redox kinetics. Heterostructure catalysts can synergistically combine the advantages of each component with an interfacial built-in electric field (BIEF), demonstrating outstanding adsorption and catalytic effects. However, the relationship between surface electronic structure and interfacial charge redistribution remains unclear. Here, surface-oxidized MXene/α-Fe 2 O 3 (MXTiO/α-Fe 2 O 3 ) heterostructure is developed as model catalyst to clarify the enhancement mechanism of polysulfides adsorption and conversion. Theoretical and experimental analysis confirms that the modified MXene as an electron acceptor steals partial electrons from α-Fe 2 O 3 through interfacial asymmetric Ti-O-Fe bridge bonds, inducing the spontaneous charge redistribution. The electrons transfer through Ti-O-Fe channels creates electron-deficient Fe sites on the surface, which not only reduces the antibonding orbital electron occupation, leading to strengthening the d -p orbital hybridization between surface Fe and polysulfides, providing a strong sulfur affinity, but also weakens S S bonds for accelerated cleavage. The resulting catalyst enables Li-S batteries with a capacity of 538 mAh g −1 at 5.0C. This investigation establishes a fundamental correlation between interfacial electron delocalization and surface electronic configuration modulation, thereby providing a rational insight for designing advanced heterostructured electrocatalysts in high-performance energy storage/conversion applications.
✓ 已验证
产品关联
DOI
高影响因子
Advanced Energy Materials
·
2025
·Vol. 15
·期 34
·2502226
·
IF 26
Mengting Guo,Changping Wang,Yize Niu,Mingyue Ruan,Dong Yang,Fei Wang,Haonan Wang,Nankai Wang,Ying Jiang,Tianyi Li,Yan He,Qiang Li
The high-voltage spinel LiNi 0.5 Mn 1.5 O 4 (LNMO) is a promising cathode material for lithium-ion batteries due to its high energy and power densities, excellent thermal stability, low cost, and environmental benignity. However, the presence of Mn 3+ induces Jahn─Teller (J─T) distortion, leading to Mn─O bond elongation, lattice stress, and degradation of both structural and electrochemical stability during cycling. To address this,a bond-length engineering strategy is proposed by co-doping Fe at the Mn 16d sites and Sb at the vacant 16c positions to suppress the J─T effect and stabilize the crystal structure. Electron paramagnetic resonance (EPR), in situ X-ray diffraction (XRD), and density functional theory (DFT) calculations confirm that the Mn─O bond regulation strategy effectively mitigates MnO 6 octahedral distortion, reduces phase transitions, and enhances structural robustness. Moreover, Sb incorporation expands the lattice, facilitating Li + diffusion. As a result, the optimized FeSb-LNMO delivers remarkable electrochemical performance, retaining 98% of its initial capacity after 200 cycles at 1C, and achieving 85.6% capacity retention over 1000 cycles at 5C. This work introduces a novel bond-length engineering approach via multi-site doping to overcome degradation in high-voltage LNMO, enabling ultra-fast charging and long-term cycling stability.
研究领域:
材料科学
·
电化学
·
储能
·
电池技术
·
固态化学
✓ 已验证
产品关联
DOI
高影响因子
AICHE JOURNAL
·
2025
·
IF 4
Xiao-Ling Tang,Kang Zhao,Teng-Kun Huang,Bai-Hua He,Xu-Gang Zhang,Zhi-Qiang Liu,Yu-Guo Zheng
O -Succinyl- L -homoserine mercaptotransferase (MetZ) is a key enzyme for the synthesis of L -methionine. However, the limited tolerance to high concentrations of substrate methyl mercaptan sodium restricts its industrial applications, while the “trade-off” between activity and stability has always been a challenge for protein engineering. To address this problem, a strategy of dynamic network rigidification-local flexibility regulation was applied in this study to engineer the enzyme from Chromobacterium violaceum ( Cv MetZ). Through consensus sequence analysis and structure-guided design, the hotspot amino acid residues were anchored for mutagenesis. The best mutant T59I/T119Y/A241T was obtained with synergistic enhancement of activity and stability. The half-life ( t 1/2 ) of whole cells harboring the mutant was increased from 3.3 and 1.3 h to 20.6 and 7.2 h, in the presence of 5% and 10% methyl mercaptan sodium, respectively. The engineered enzyme was successfully immobilized with ideal usability, which laid the foundation for efficient and scale-up bioproduction of L -methionine.
研究领域:
酶工程
·
蛋白质设计
·
结构生物学
·
工业生物技术
·
生物催化
·
代谢工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Agriculture and Food Research
·
2024
·
IF 4.8
Minghao Jiang,Qiongfang Jiang,Huimin Yang,Yue Zhang
W/O/W double emulsion systems offer the ability to co-deliver water-soluble and oil-soluble bioactives, making them a promising choice for multifunctional delivery applications. This study focused on the development of a whey protein isolate-based W/O/W emulsion encapsulating fish oil and anthocyanins, with the addition of sodium alginate (SA) into the external aqueous phase. The physicochemical properties, emulsion stability, anthocyanins encapsulation efficiency (EE), and anthocyanins release during simulated gastrointestinal digestion were studied. The results indicated that the physical stability of W/O/W emulsions improved with increasing SA, attributed to the higher viscosity and the protective coating of SA on the WPI-stabilized interface. However, the EE of anthocyanins in SA-reinforced W/O/W emulsions was found to be lower. Excessive SA concentration, such as 1.0%, was observed to be unfavorable to maintaining the internal W 1 /O interface integrity. Overall, the double emulsion structure effectively regulated the release of anthocyanins throughout the digestion process. The study concluded that W/O/W emulsions containing 0.75% SA achieved optimal stability and controlled-release characteristics. These findings offer valuable insights into fabricating double emulsions for multifunctional delivery purposes, showcasing their potential applications in the food and pharmaceutical industries.
研究领域:
食品科学
·
药学
·
生物技术
✓ 已验证
DOI
高影响因子
AICHE JOURNAL
·
2025
·
IF 4
Jinlin Mei,Zhentao Liu,Zhengkai Cao,Aocheng Wang,Xiaoyang Kong,Aijun Duan,Chunya Wang,Chunming Xu,Xilong Wang
Hierarchical Y/SBA-15 meso-microporous composites (YS- x ) and corresponding highly dispersed catalysts (Ni/YS- x ) were prepared and applied to the production of jet fuel range hydrocarbons by the selective hydrogenation of oleic acid. Small particle size and electron-deficient Ni δ+ are detrimental to the C C bond activation of the η 1 (C)-acyl conformation and inhibit the decarbonylation/decarboxylation pathway. Besides, the activation ability of the C C bond is regulated to avoid excessive cleavage by the acidity and diffusion properties of the hierarchical Ni/YS- x catalysts, thus affecting their hydroisomerization and hydrocracking properties. The abundant acid sites are beneficial to the selective activation of the C O bond of the η 2 (C, O)-aldehyde conformation and the promotion of the reductive deoxygenation pathway. The optimal Ni/YS-1 shows the highest iso / n -alkane ratio ( i / n = 6.26) and superior jet fuel range hydrocarbons yield (48.8%, 340°C), which is a benefit from its outstanding acid–metal balance and worthy diffusion property.
研究领域:
催化
·
多孔材料
·
化学反应工程
·
能量转换
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMISTRY & BIODIVERSITY
·
2021
·Vol. 18
·期 11
·e2100301
·
IF 2.408
Zhuojin Yang,Yi Zheng,Nafisa Tursumamat,Mingyan Zhu
Isorhamnetin is a natural flavonoid which shows a variety of biological activities such as antioxidant, anti-inflammatory and antitumor. In order to identify the cellular binding protein of isorhamnetin as potential anti-cancer target, we first synthesized 3′- O -substituted quercetin as isorhamnetin homologues and evaluated the growth inhibitory activity of these derivatives on breast, colon and prostate cancer cell lines. The preliminary results showed that the 3′- O modification did not affect the cytotoxic activity of the scaffold. Analysis of the co-crystal structure and the docking pose of isorhamnetin with reported binding protein of isorhamnetin or quercetin indicated the 3′- O -substitution groups located outside of the binding pocket, which is in accordance with activity of 3′- O derivatives. Then a biotin conjugate of isorhamnetin with a tetraethylene glycol (PEG) 4 linker at the 3′ position was synthesized and the resulting probe retained the anti-proliferative activity on cancer cell lines, while the cellular fluorescence analysis showed the distribution of probe inside the cells which indicated the probe had limited cell permeability. Finally, pull down assay both in situ inside cells and in the cell lysates indicated the isorhamnetin biotin probe was capable of protein labeling in cell lysates. These findings provide the isorhamnetin 3′- O -biotin probe as a tool to reveal the target proteins of isorhamnetin. Graphical
研究领域:
药理学
·
癌症研究
·
化学
·
分子生物学
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Ruifang Ma,Wenxing Yang,Zeqi Tong,Zongliang Yu,Yongjin Zou
This study synthesized a NiCo₂O₄–bacterial cellulose (BC)–reduced graphene oxide (GO) composite material suitable for flexible supercapacitors using a two-step hydrothermal method. The BC@GO framework consisted of two carbon-based materials: BC retained a 3D interconnected nanofiber network after carbonization, while GO provided a layered structure. This multi-scale porous structure enabled high specific capacitance, mechanical flexibility, and electrochemical stability in the composite. In a three-electrode system, the composite material exhibited a specific capacitance of 1386.4 F g −1 at a current density of 1 A g −1 , with a capacitance retention rate of 73.4 % from 1 to 10 A g −1 . Finally, this study fabricated a high-performance semi-solid flexible asymmetric supercapacitor (FASC) using NiCo₂O₄/BC@GO as the cathode, activated carbon (AC) as the anode, and polyacrylic acid gel as the electrolyte. The fabricated NiCo₂O₄/BC@GO//AC FASC achieved a high energy density of 29.6 Wh kg −1 (19.7 Wh m −2 ) at 7948 W kg −1 (53 kW m −2 ) and 54.8 Wh kg −1 (365 Wh m −2 ) at 836 W kg −1 (5.6 kW m −2 ), with a capacitance retention of 92.2 % after 10,000 cycles. Two fully charged FASCs devices connected in series simultaneously powered 18 LED lights for approximately 50 s. The FASC exhibited exceptional specific capacitance and cycling stability, surpassing other controls in flexible mechanical performance, indicating its potential for flexible semi-solid supercapacitor applications.
研究领域:
材料科学
·
电化学
·
纳米技术
·
储能
·
柔性电子
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）