COLLOIDS AND SURFACES B-BIOINTERFACES
·
2022
·
IF 5.999
Wenfeng Zhou,Xiaohong Zhou,Yuan Rao,Rijia Lin,Lei Ge,Pengpeng Yang,Hongman Zhang,Chenjie Zhu,Hanjie Ying,Wei Zhuang
Enzyme catalysis has clear advantages in the process of oxidizing glucose to produce gluconic acid . In the enzyme cascade, the improvement of the cascade efficiency is desired but challenging. Graphene oxide (GO) and ZIF-8 composites as enzyme support offer the promising opportunity that not only the cascade efficiency can be improved by control the distance between two enzymes, but also the stability can be improved. Here, a new strategy of GO assisted co-growth of ZIF-8 and enzyme was carried in a one-pot synthesis. Glucose oxidase&catalase immobilized in the ZIF-8/GO composites can obtain 98% residual activity after 15 days of storage with almost no enzyme shedding. The residual activity is still higher than 75% after 5 repeated uses. The presented method of controllable growth of metal organic frameworks on 2D nanosheet can also be extended for renewable energy devices, gas storage and separation of small molecules .
研究领域:
生物化学
·
材料科学
·
酶工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Water Process Engineering
·
2024
·
IF 6.3
Xu Meng,Chengzhi Song,Zhenglong Xing,Manuel J. Lis Arias,Junfeng Yan,Qiang Ren,Yanli Xiang,Liping Liang
An efficient hydrophobic and lipophilic cotton fabric was designed for oil/water separation. ZIF-8 (zeolitic imidazolate framework-8) nanocrystals were synthesized and subsequently uniformly mixed with a GO (graphene oxide) dispersion, and then the cotton fabric was immersed in a pre-crosslinked PDMS (polydimethylsiloxane) solution and the mixture of ZIF-8 and GO to form rough and dense surface morphology and to achieve hydrophobic modification. Its surface morphologies, chemical structures , contact angles, and oil/water separation performances were characterized. The ability of prepared fabric with a separation efficiency was better than 95 % on average for various types of oil/water mixtures demonstrated the hydrophobic/oleophilic property, meanwhile, demonstrated a noteworthy degree of durability. It holds significant practical implications for the development of environmentally friendly and highly efficient materials for oil/water separation.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2026
·
IF 8.3
Hui Jia,Bo Dong,Senpeng Zhang,Zhuojun Wang,Yulong Wang,Yankuan Li
Accurate detection of carbon dioxide (CO₂) is important in environmental monitoring and industrial process control. Optical fiber sensors have attracted considerable attention for CO₂ detection owing to their compact size, immunity to electromagnetic interference, and capability for remote sensing. However, achieving high sensitivity and adsorption affinity within practical CO₂ concentration ranges remains challenging. In this work, we propose a fiber interferometric CO₂ sensor based on a cascaded dual-sphere intermodal interferometer (IMI) functionalized with a ZIF-8/graphene oxide (GO) hybrid membrane. The dual-sphere interferometric structure enhances the interaction between cladding modes and the surrounding environment, while the ZIF-8/GO hybrid membrane provides a hierarchical adsorption–diffusion interface that improves CO₂ adsorption affinity and gas transport efficiency. Experimental results show that the sensor exhibits a high sensitivity of −286 pm/% CO₂ within the concentration range of 0.5–4.0%, together with excellent linearity (R² = 0.998), good repeatability, and negligible interference from temperature and humidity variations. Furthermore, the hierarchical micro-mesoporous architecture facilitates efficient gas diffusion, endowing the sensor with favorable response and recovery kinetics for continuous monitoring applications. These results indicate that the proposed sensing strategy provides an effective approach for high-performance optical fiber CO₂ sensing through the integration of an optimized interferometric structure and a hybrid MOF/2D sensing membrane.
✓ 已验证
DOI
高影响因子
ANALYTICAL BIOCHEMISTRY
·
2021
·
IF 3.365
Xin Liu,Jihong Fu,Lili Wang,Caijuan Wang
A novel microwave-assisted (MA) headspace solid-phase extraction (HS-SPE) based on polydimethylsiloxane (PDMS)/ZIF-8@GO sponge was developed for the simultaneous extraction and determination of essential oil constituents in lavender. The PDMS/ZIF-8@GO sponge with a high surface area and excellent adsorption capacity was successfully applied in the HS-SPE process. Microwave-assisted coupled with PDMS/ZIF-8@GO sponge headspace solid-phase extraction followed by GC-MS was proposed. Different experimental parameters were investigated. The optimal conditions were found to be as follows: 2:1 as the quality ratio of ZIF-8 to GO , ZIF-8@GO dosage of 30 mg, microwave power of 600 W, extraction time of 10 min and desorption solvent of n -hexane. This method was successfully applied to the analysis of 11 samples of lavender in different varieties. A total of 52 compounds were identified by the proposed method. A good linearity was observed from 14 to 800 ng with a correlation coefficient (R 2 ) value of >0.99. Multivariate statistical analysis was used to establish the relationship between the varieties and the volatile components for further discriminant analysis. These results demonstrated that the MA-PDMS/ZIF-8@GO is an efficient, sensitive and small sample consumption method for the determination of the essential oil in dried plant materials.
研究领域:
分析化学
·
精油
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DESALINATION
·
2025
·
IF 9.8
Yilin Wu,Yanke Xu,Faguang Ma,Jingjing Zhen,Yue Li,Fanlei Kong,Ming Yan
In this study, modified hollow e-ZIF-8 nanoparticles with a hollow structure and hydroxyl-rich surface were ingeniously synthesized through a one-step etching method, thereby increasing the contact area and addressing the issue of stacking imprinting sites, fundamentally enhancing selectivity. Among these, the hollow structure of the e-ZIF-8 nanoparticles not only increased the interlayer spacing of the graphene oxide (GO) nanosheets, providing additional pathways for water molecules, but also, through π-π interactions, cross-linked the phenol-modified nanoporous metal-organic frameworks (MOFs) with the GO nanosheets, significantly enhancing the structural stability and anti-fouling capability of the composite membrane. The effects of different e-ZIF-8 addition amounts on membrane flux and hydrophilicity were investigated, constructing a GO-based imprinting structure on the stacked e-ZIF-8/GO nanosheet surfaces, offering a novel strategy to improve the selectivity and stability of the membrane. The maximum adsorption capacity of e-MG-IMs reached 38.35 mg g −1 , demonstrating good selective separation factors ( α RBV/ACV = 3.24, α RBV/AZT = 2.41 and α RBV/LAM = 4.21), as well as excellent permeation selectivity ( β ACV/RBV = 4.75, β AZT/RBV = 4.42 and β LAM/RBV = 5.92). In this study, the optimized regulation of GO nanosheets extended the molecular transport channels, facilitating the construction of more molecular recognition sites, thus positively impacting the separation performance of the imprinting membrane.
研究领域:
材料科学
·
药物分离工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 11
·6099-6109
·
IF 2.936
Dandan Huang,Qingping Xin,Yazhou Ni,Yingqian Shuai,Shaofei Wang,Yifan Li,Hui Ye,Ligang Lin,Xiaoli Ding,Yuzhong Zhang
In this study, composite nanosheets (ZIF-8@GO) were prepared via an in situ growth method and then incorporated into a polyimide (PI) matrix to fabricate mixed matrix membranes (MMMs) for CO2 separation. The as-prepared MMMs were characterized by Fourier transform infrared (FT-IR) spectroscopy, scanning electron microscopy (SEM), X-ray diffraction (XRD), differential scanning calorimetry (DSC), thermogravimetric analyses (TGA) and water uptake measurements. Water uptake measurements establish the relationship between the gas permeability and water uptake of membranes and an increase in the water uptake contributes to the CO2 permeability owing to an increase in the CO2 transport channels. The MMMs exhibit excellent CO2 permeability in when compared with an unfilled PI membrane in a humidified state. The ZIF-8@GO filled membranes can separate CO2 efficiently due to the ZIF-8@GO nanocomposite materials combining the favorable attributes of GO and ZIF-8. First, the high-aspect ratio of the GO nanosheets enhances the diffusivity selectivity. Second, ZIF-8 with a high surface area and microporous structure is beneficial to the improvement of the CO2 permeability. Third, ZIF-8@GO possesses synergistic effects for efficient CO2 separation. The MMM with 20 wt% ZIF-8@GO exhibits the optimum gas separation performance with a CO2 permeability of 238 barrer, CO2/N2 selectivity of 65, thus surpassing the 2008 Robeson upper bound line.
研究领域:
材料科学
·
膜分离技术
·
高分子化学
·
环境工程
·
气体吸附与传输
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）