APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
·
2026
·
IF 3.5
Long Neng-Bing,Zhu Hong-Lin,Li Tian-Hua,Zhang Rui-Feng
A large-sized 3D microflow support was prepared by chemical liquid deposition of an epoxy-based porous polymer within a 3D melamine sponge. This novel support demonstrated advantages over traditional microfluidic reactors in terms of easier scalability, simplified enzyme loading, and superior multiphase dispersion. The resultant composite sponge was utilized as a microflow support for the immobilization of phospholipase D (PLD) through an adsorption and cross-linking method. Under optimal immobilization conditions, the loading capacity and specific activity of the immobilized PLD were 50.2 mg/g support and 14.5 U/mg protein, respectively. The PLD-immobilized microflow supports were positioned in a columnar reactor, where a biphasic transesterification reaction was conducted in a continuous circulation mode powered by two pumps. The PLD-catalyzed reaction yielded phosphatidylserine (PS) with high yields and reaction ratios. Under optimized conditions, the PS yield reached as high as 93.1% within 4 h at 45 °C, by using free PLD the PS yield reached only 61.5% within 12 h. After 10 cycles, the immobilized PLD retained 76% of its original activity.
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2026
·Vol. 61
·期 15
·10503-10517
·
IF 4.4
Chen Jiabing,Lu Zijing
Ostwald ripening (OR) and particle migration and coalescence (PMC)-induced sintering of metal nanoparticles remains a major challenge in heterogeneous catalysis. In the methoxycarbonylation of ethylene, noble metals such as Ru and Pd serve as active centers, yet inevitable metal aggregation during the reaction reduces both the number of active sites and catalyst lifetime. Herein, we report a highly efficient Ru catalyst supported on defect-rich TiO 2 with slight carbon coating for ethylene methoxycarbonylation. Systematic characterizations reveal that the thin carbon layer effectively suppresses OR, while appropriate metal–support interactions prevent PMC. The synergistic effect of these features maximizes the exposure of Ru 0 active sites, enhancing catalytic activity and stability. The catalyst achieves a remarkable reaction rate of 13.18 mol/mol Ru /h and a selectivity of 99% toward methyl propionate, outperforming previously reported Ru-based catalysts. Furthermore, the catalyst retains over 90% of its activity after five consecutive cycles. This work provides a new strategy for designing robust and highly active catalysts for heterogeneous ethylene methoxycarbonylation.
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ACS Nano
·
2025
·
IF 16
Yutian Lei,Yakun Shi,Ping Li,Jing Li,Wenqing Zhang,Si-Yang Liu,Yuzhi Xu,Zhaofan Luo,Xing Han,Yanfei Zhang,Jianhe Guo,Zong Dai
The reliable application of surface-enhanced Raman scattering (SERS) in bioanalysis is critically constrained by inherent trade-offs among sensitivity, chemical stability, and signal homogeneity of conventional substrate materials. Although silver–gold core–shell nanocubes (Ag@Au NCs) stand out for their high SERS activity and improved stability, preparing complete and uniform Ag@Au NCs remains challenging due to galvanic replacement-induced Ag core etching. To address this problem, this work reveals three distinct growth modes during Au shell deposition and proposes a size-determined growth rule to guide well-preserved Ag@Au NCs synthesis. We identified that larger Ag nanocubes (Ag NCs) with fewer unpassivated {111} facets preferentially form well-preserved Ag@Au NCs through layer epitaxial growth─an exclusive mode enabling intact ultrathin Au shells without Ag core etching. The resulting Ag@Au NCs exhibit exceptional batch-to-batch consistency and retain the high SERS activity of pristine Ag NCs, while achieving prolonged chemical stability (>180 days). Benefiting from their uniform morphology, these NCs can be assembled into highly ordered two-dimensional substrates with superior signal reproducibility (RSD = 4.96%) and plasmon activity (Raman enhancement factor >107). By integrating this substrate with a tetrahedral DNA-based detection method, a portable SERS biosensor cartridge was developed for multiplexed miRNA profiling in human plasma. Leveraging the superior performance, this platform demonstrates compelling potential for reliable cervical cancer diagnosis and staging. The modular cartridge design also makes it a versatile platform for diverse biomedical applications.
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JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2025
·
IF 2.1
Jingli Sun,Xuqiang Li,Lu Chen,Yujie Zhen,Siyu Zheng,Shaolong Dong,Yingmin Yu
In order to reduce the impact of nitrogen-containing compounds in oil products on the environment, this paper selected n-heptane as the oil product model and pyridine as the nitrogen-containing compound. Four inexpensive extractants (furfuryl alcohol, 1,4-butanediol, N,N-dimethylacetamide, and dimethyl sulfoxide) were selected as the extractants to separate pyridine from the oil model at 303.2 K, and the liquid–liquid equilibrium (LLE) data were measured. The partition coefficients (D) and separation coefficients (S) of the extractants were calculated and used to evaluate the extractants. Based on the LLE data, correlations were performed using NRTL and UNIQUAC models, and the interaction parameters of the corresponding optimization models were obtained. The root-mean-square deviation (RMSD) values of the NRTL and UNIQUAC models were 0.98% and 1.09%, respectively. The GUI-MATLAB tool was selected to evaluate the accuracy of the binary interaction parameter regression by a Gibbs energy topology analysis. To probe the underlying mechanism of the extraction process between the extractants and pyridine, the σ-profile was used to analyze the interaction patterns between the extractants and pyridine. Given their high extraction efficiency, the studied extractants can be considered as potential extractants for extractive denitrification processes.
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NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 16
·7930-7938
·
IF 3.3
Lingyun Wu,Liang Gao,JiaMing Li,Tianyu Wu,Dongli Chen,Zhou Manxi,Gang Sui
Adsorbent materials with high absorption capacity, stable mechanical properties, greenness and economy are highly desirable for efficient removal and recovery of oil from wastewater. Herein, an ultralight, low-cost and reusable hydrophobic aerogel of cellulose acetate/polyethylene oxide hybrid nanofibers was developed through thermal crosslinking and organosilicon modification. Through thermal crosslinking and an ice crystal template, a hierarchical pore structure was obtained which endowed the aerogel with mechanical stability and oil-absorption capacity. In addition, the structure was further strengthened after chemical vapor deposition of methyl trichlorosilane and good hydrophobicity (contact angle of 135.5°) can be realized. The surface-modified aerogel presented an ultralow density (8.74 mg cm−3), excellent resilience (completely recover to its original height after 50 compression cycles), high absorption capacity (weight gain of 63–128 g g−1) and reusability. Therefore, nanofibrous aerogels with outstanding compressive resilience and reusability make it promising to meet the increasing demand in the field of oil pollution cleaning.
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Membranes
·
2023
·Vol. 13
·期 3
·255
·
IF 4.2
Ruixian Zhang,Yuanbin Mo,Yanfei Gao,Zeguang Zhou,Xueyi Hou,Xiuxiu Ren,Junzhong Wang,Xiaokun Chu,Yanyue Lu
Oil/water mixtures from industrial and domestic wastewater adversely affect the environment and human beings. In this context, the development of a facile and improved separation method is crucial. Herein, dopamine was used as a bioadhesive to bind tea polyphenol (TP) onto the surface of a polyvinylidene fluoride (PVDF) membrane to form the first hydrophilic polymer network. Sodium periodate (NaIO4) is considered an oxidising agent for triggering self-polymerisation and can be used to introduce hydrophilic groups via surface manipulation to form the second hydrophilic network. In contrast to the individual polydopamine (PDA) and TP/NaIO4composite coatings for a hydrophobic PVDF microfiltration membrane, a combination of PDA, TP, and NaIO4has achieved the most facile treatment process for transforming the hydrophobic membrane into the hydrophilic state. The hierarchical superhydrophilic network structure with a simultaneous underwater superoleophobic membrane exhibited excellent performance in separating various oil-in-water emulsions, with a high water flux (1530 L.m−2h−1.bar) and improved rejection (98%). The water contact angle of the modified membrane was 0° in 1 s. Moreover, the steady polyphenol coating was applied onto the surface, which endowed the membrane with an adequate antifouling and recovery capability and a robust durability against immersion in an acid, alkali, or salt solution. This facile scale-up method depends on in situ plant-inspired chemistry and has remarkable potential for practical applications.Keywords:superior separation method;hierarchical superhydrophilic network;steady polyphenol coating;oil-in-water emulsion
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ANALYTICAL LETTERS
·
2023
·
IF 2
Zhengyu Wang,Yufeng Hu,Zhiduo Ding,Hao Zhou,Jianye Zhang,Jingjing Zhan,Minghuo Wu
For the identification of trace-level organic nitrogen compounds (NCs) in gasoline, a method consisting of water-assisted dispersive solid-phase extraction (DSPE) and high-performance liquid chromatography-high resolution mass spectrometry was developed in which mixed-mode cation exchange was used as the adsorbent. To increase the DSPE efficiency, water was dispersed into the gasoline to increase the pronation of NCs and enhance the ionic interaction with the adsorbent. After systematic optimization of DSPE conditions, including the adsorbent mass, sample volume, water to gasoline ratio, sample loading time, washing and elution solvents, sensitive determination of NCs (detection limits from 0.1 to 5 ng/L for the 14 analytes) was achieved by this method with a 100-fold enrichment. A number of unknown NC isomers were observed from the extracted ion chromatograms based on the accurate determination of mass-to-charge ratio (m/z), from which two sets of isomers at theoretical m/z of 122.09643 and 136.11208 were selected for identification. By careful elucidation of the product ion spectra of the selected ions, 16 NCs were putatively identified, in which six non-aniline homologs were reported for the first time.
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JOURNAL OF CHEMICAL THERMODYNAMICS
·
2023
·
IF 2.6
Wenyang Fan,Chunliang Ge,Delong Ding,Liping Deng,Jun Gao,Dongmei Xu
Separation of sulfides from fuel oil is of great significance for environmental protection. In this paper, the organic solvent (sulfolane) was selected to separate sulfides (thiophene and 2-methylthiophene) from model fuel oil ( n -heptane). The liquid–liquid equilibrium data of the mixtures ( n -heptane + thiophene/2-methylthiophene + sulfolane) were measured at 303.15, 313.15 and 323.15 K under 101.3 kPa. The mass conservation of the experimental data were checked, and the reliability of the tie-lie data were evaluated by the Bachman, Hand and Othmer-Tobias equations. The extraction performance of sulfolane was assessed through the separation factor and partition coefficient, and compared with those for other reported solvents, indicating that sulfolane has better extraction performance for thiophene compared with 2-methylthiophene. Then, the quantum chemical calculation was applied to found the separation mechanism of sulfolane. The analysis of electrostatic potential, interaction energies, and reduced density gradient showed that the main interactions between sulfolane and thiophene (or 2-methylthiophene) were van der Waals and weak hydrogen bond forces. Finally, the non-random two-liquid theory (NRTL) and universal quasi-chemical theory (UNIQUAC) models were applied to fit the tie-line data of the investigated mixtures with the root-mean-square deviation (RMSD) lower than 0.01. The mixed surface analysis method based on Gibbs energy topology is used to verify the binary interaction parameters, which provides basic data for simulating the separation process of sulfide in fuel oil.
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JOURNAL OF CHROMATOGRAPHY A
·
2023
·
IF 4.1
Ziqi Sun,Meiling Qi
This work reports the investigation of a new poly(propylene-carbonate) copolymer terminated by the adamantane cages (APPC) as the stationary phase for gas chromatographic (GC) analyses. In GC, the selectivity of a stationary phase is the key factor that governs the column separation performance for analytes, particularly those of high similarity in structures and properties. As such, we employed more than a dozen of isomer mixtures of separation difficulty for investigating the separation performance of the APPC column, involving the isomers of alkanes, alkylbenzenes, halobenzenes phenols and anilines. Meanwhile, the column coated with poly(propylene carbonate) diol (PPCD) differing from APPC only in their terminal groups and two commercial columns coated with polyethylene glycol (PEG) and polysiloxane, respectively, were used as the reference columns. The separation results evidenced the distinctly advantageous performance of the APPC column over the reference columns. Moreover, the APPC column showed excellent repeatability and reproducibility with the relative standard deviation (RSD) values over the range of 0.01%–0.04% for run-to-run, 0.15%–0.28% for day-to-day and 3.4%–3.9% for column-to-column ( n = 4). Its application to GC–MS analysis of the verbena essential oil demonstrated its separation advantages for a wide range of components in practical samples. Up to date, the adamantyl-terminated poly(ether-carbonate) copolymers have not been reported in any fields. Its high-resolution performance demonstrates the feasibility of adamantyl-terminated block copolymers as highly selective stationary phases for GC analyses, which offers a vast room for fundamental researches and applications.
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JOURNAL OF SURFACTANTS AND DETERGENTS
·
2023
·Vol. 26
·期 5
·721-731
·
IF 1.6
Jian Zhang,Bo Huang,Chunhua Zhao,Wensheng Zhou,Yang Guang,Yizhuo Ge,Qiyao Shi,Minggui Chen
Low interfacial tension (IFT) drainage and imbibition are effective methods for improving oil recovery from reservoirs that have low levels of oil or are tight (i.e., exhibit low oil permeability). It is critical to prepare a high efficient imbibition formula. In this work, a novel 2,4,6-tris(1-phenylethyl)phenoxy polyoxyethylene ether hydroxypropyl sodium sulfonate (TPHS) surfactant was synthesized and evaluated for imbibition. Its structure was confirmed by Fourier transform infrared spectroscopy and the interfacial tension (IFT) of the crude oil/0.07% TPHS solution was 0.276 mN/m. When 0.1 wt% TPHS was mixed with 0.2 wt% alpha olefin sulfonate (AOS), the IFT was lowered to 6 × 10 −2 mN/m. The synergy between nanoparticles (NPs) and TPHS/AOS mixed surfactant was studied by IFT, contact angle on sandstone substrates, zeta potential, and spreading dynamics through microscopic methods. The results show that the surfactant likely adsorbs to the NP surface and that NP addition can help the surfactant desorb crude oil from the glass surface. With the addition of 0.05 wt% SiO 2 NPs (SNPs), the imbibition oil recovery rate increased dramatically from 0.32%/h to 0.87%/h. The spontaneous imbibition recovery increased by 4.47% for original oil in place (OOIP). Compared to flooding by TPHS/AOS surfactant solutions, the oil recovery of forced imbibition in the sand-pack increased by 12.7% OOIP, and the water breakthrough time was delayed by 0.13 pore volumes (PV) when 0.05% SNPs were added. This paper paves the way for enhanced oil recovery in low-permeability sandstone reservoirs using novel TPHS/AOS surfactants and SNPs.
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MATERIALS CHEMISTRY AND PHYSICS
·
2023
·
IF 4.6
Xiao Teng,Bo Zhang,Luxia Yin,Wanyi Tao,Zhang Wen,Zekai Zhang,Wensheng Ning
A series of PdO/CeO 2 /SiO 2 -z aerogel composites with different molar ratio of Si/Ce were facilely fabricated via sol-gel method combined with atmospheric drying technology, where a major of Ce 3+ species could be oxidized to Ce 4+ species by adding hydrogen peroxide. They were used to remove thiophenics from model fuels and aromatics, compared with PdO/SiO 2 and CeO 2 /SiO 2 aerogel composites. Adding Ce and Pd led to an appearance of weak Lewis acid centers on the surface of adsorbents. Compared with PdO/SiO 2 and CeO 2 /SiO 2 , the adsorption capacity of PdO/CeO 2 /SiO 2 -z significantly increased, in which PdO/CeO 2 /SiO 2 -100 performed best and the adsorption capacity for thiophene was 15.0 mg-S/g ads , which was about the sum of PdO/SiO 2 -636 and CeO 2 /SiO 2 -100. The case was attributed to π-complexation of Pd 2+ and S-M (Pd, Ce, acted as Lewis acid centers) bond (σ) with thiophenics, where the adsorption process was dominated by S–Ce bond. Combined with the same chemical state of Pd and Ce in single metal and bimetal adsorbents verified by XPS , it can be deduced that no synergistic interaction between Pd and Ce species was formed in the adsorption process. PdO/CeO 2 /SiO 2 -100 exhibited a higher resistance for competitive adsorption of aromatics and a good solvent washing regeneration performance. The adsorption process of PdO/CeO 2 /SiO 2 -100 for thiophene was well fitted by Langmuir isothermal and pseudo-secound-order model and were spontaneous and endothermic. The solvents (n-heptane, benzene and p-xylene) have no obvious effect on the adsorption thermodynamics and kinetics of PdO/CeO 2 /SiO 2 -100.
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Advanced Science
·
2023
·Vol. 10
·期 20
·2301341
·
IF 15.1
Chuanyang Ge,Xuyang An,Xinxin He,Zhan Duan,Jiatai Chen,PingAn Hu,Jie Zhao,Zhenlong Wang,Jia Zhang
Multifunctional capability and low coupling electronic skin (e-skin) is of great significance in advanced robot systems interacting with the human body or the external environment directly. Herein, a multifunctional e-skin system via vertical integrated different sensing materials and structures is presented. The multifunctional e-skin has capacity sensing the proximity, pressure, temperature, and relative humidity simultaneously, with scope of 100–0 mm, 0–30 N, 20–120 °C and 20–70%, respectively. The sensitivity of the four kinds of sensors can be achieved to 0.72 mm −1 , 16.34 N −1 , 0.0032 °C −1 , and 15.2 pF/%RH, respectively. The cross-coupling errors are less than 1.96%, 1.08%, 2.65%, and 1.64%, respectively, after temperature compensation. To be state-of-the-art, a commercial robot is accurately controlled via the multifunctional e-skin system in the complicated environment. The following and safety controlling exhibit both accuracy and high dynamic features. To improve the sensing performance to the insulating objects, machine learning is employed to classify the conductivity during the object approaching, leading to set the threshold in dynamic. The accuracy for isolating the insulator increases from 18% to 88%. Looking forward, the multifunctional e-skin system has broader applications in human–machine collaboration and industrial safety production technology.
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危险品化学品经营许可证（带存储）