SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Peijing Shao,Yao Shen,Jiexu Ye,Jingkai Zhao,Lidong Wang,Shihan Zhang
Metal-organic frameworks (MOFs) have been extensively studied as candidate materials for enzyme immobilization over recent years. In this work, carbonic anhydrase was immobilized in ZIFs by “in situ” immobilization method. The growth state of ZIF-8 was adjusted by adjusting the ratio of Zn 2+ and 2-Hmim to obtain crystals with different morphologies (cubic-, dodecahedral- and leaf-shape). In addition, different surfactants (cationic surface-active agent, an-ionic surfactant, and non-ionic surface-active agent) were added as “shape-inducing agents” to further regulate the crystal shapes, thus affecting the activity of enzyme immobilization in ZIFs. Through CO 2 absorption test, it was found that the thick leaf-shaped CA/ZIF-L-(PVP) induced by PVP had a higher relative activity (150%) than other shapes (cubic, dodecahedral, “burr puzzle” shape, “interpenetration leaves” shape, etc.) of immobilized enzymes. In addition, CA/ZIF-L-(PVP) exhibited excellent reusability and stability, which maintained a relative activity of 131% after 5 cycles, and remained approximately 99% relative activity after 15 days at 40 °C in MDEA solution.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Linzhi Zuo,Yang Li,Long Cheng,Tao Yu,Yiting Che,Shitan Yan,Kiushkin Vladimir Yurievich,Ting Bian,Daifen Chen
Interfacial solar steam generation (ISSG) technology is considered to be one of the most promising approaches to alleviating the global shortage of clean water due to its high solar thermal conversion efficiency. However, achieving stable evaporation in high salinity solutions and preventing the occurrence of salt deposition phenomena remains a challenge. Here, an efficient and stable photothermal membrane-based evaporator has been developed, which consists of polydopamine (PDA) modified leaf-like zeolitic imidazolate framework (ZIF-L) implanted in sodium alginate (SA) membrane supported on a melamine sponge (S-ZIF-L/PDA sponge), providing more advantages for boosting the photothermal conversion performance and preventing salt deposition. This S-ZIF-L/PDA sponge displays an excellent light absorption (>95 %), and remarkable evaporation rate of 1.66 kg·m −2 ·h −1 with a solar-thermal efficiency of 91.06 % under 1.0 sun (1 kW·m −2 ) illumination. Benefiting from the super hydrophilic feature of the melamine sponge and the rejection properties of the SA membrane structure, the obtained sponge effectively prevents salt and contaminants from depositing on the surface. Particularly, the S-ZIF-L/PDA sponge achieves an evaporation efficiency of 86.17 % in 20 wt% NaCl solution, along with excellent resistance to salt deposition and marvelous stability in cycling tests. The salt ion concentration of the obtained fresh water is much lower than the World Health Organization (WHO) drinking water standard, and the organic removal rate exceeds 99 %. This work provides a competitive solution for high-salinity desalination and wastewater treatment.
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2022
·
IF 8.025
Guangye Ge,Lijuan Wu,Fenglan Zhang,Tianyi Wang,Lei Han,Xiaoying Kong,Jinsheng Shi
In recent years, photodynamic therapy (PDT) or chemodynamic therapy (CDT) based on the antimicrobial property or anti-biofilm property of reactive oxygen species (ROS) have been widely recognized for their low susceptibility to microbial resistance. However, due to the complication of the three-dimensional structure of the biofilm at the wound site and the high quenching rate of common ROS, the treatment with traditional ROS could not achieve satisfactory wound healing effects. Here, Na 2 S 2 O 8 @ZIF-67/GOx nanoparticles (NZG NPs) were prepared as a new high-toxic ROS nanogenerator for application of biofilm-infecting wound healing with the assistance of glucose oxidase (GOx) for amplified CDT and immune activation. When the NZG NPs entered the biofilm, Co-based metal organic frame (ZIF-67) ruptured in the acidic microenvironment, which induced the release of GOx and the production of gluconic acid and H 2 O 2 , further promoting the decrease of pH of the biofilm microenvironment and in turn accelerating the cleavage of ZIF-67 and the release of Na 2 S 2 O 8 . Then, S 2 O 8 2− could gradually transformed into high-toxic sulfate radical ( SO 4 − ), part of which further produced OH in situ with H 2 O, thereby inhibiting the proliferation of bacteria and biofilms. Interestingly, these two types of ROS not only caused direct damage to the biofilm, but also activated the immune system of the wound site as well as the body more effectively, which also played an indirect role in promoting biofilm destruction and wound healing. In vitro and in vivo results showed that, as a new high-toxic ROS nanogenerator, the NZG NPs supply amplified chemodynamic therapy and immune activation to destroy biofilms, but also achieve effective wound healing without causing bacterial tolerance, which provides a new strategy for the development of biofilm-infecting wound healing.
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PubMed
高影响因子
Sustainable Energy & Fuels
·
2023
·Vol. 7
·期 5
·1245-1255
·
IF 5.6
Furong Zhang,Kunpeng Jiang,Guisheng Zhu,Huarui Xu,Xiuyun Zhang,Yunyun Zhao,Yejun Zhang,Qiangbin Wang,Pengfei Pang,Aibing Yu
Solid-state lithium batteries (SSLBs) are promising energy-storage devices. However, the low ionic conductivity of solid electrolytes and poor interface stability are two challenges to their commercial application. To alleviate these problems, we investigated three different composite modes of ZIF-8 and SiO2: (1) mechanical mixing of ZIF-8 and mesoporous SiO2 (ZIF-8+SiO2); (2) mesoporous SiO2 spheres adsorbed on the surface of ZIF-8 (ZIF-8/SiO2); (3) mesoporous SiO2 shell deposited on the surface of ZIF-8 (ZIF-8@SiO2). In particular, ZIF-8@SiO2/IL was obtained when ZIF-8@SiO2 with a hierarchical pore structure was used as the host of the Li+-containing ionic liquid (IL). By combining ZIF-8@SiO2/IL as a filler with polyethylene oxide and lithium bis(trifluoromethanesulfonyl)imide, the composite electrolyte (PZS-3) showed excellent performance. PZS-3 showed a high ionic conductivity (2.35 × 10−4 S cm−1 at 30 °C), wide electrochemical stability window (5.5 V), and high Li+ transference number (0.6), and excellent compatibility with the Li metal and electrodes. An SSLB composed of LiFePO4/PZS-3/Li exhibited outstanding cycling stability with an initial discharge capacity of 155.6 mA h g−1 at 0.2 C and capacity retention of 96.5% after 100 cycles. This novel design strategy offers a promising approach for MOFs composited with other inorganic materials to construct prospective hierarchical Li+ channels.
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高影响因子
BIOELECTROCHEMISTRY
·
2022
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IF 5.76
Ya Zhang,Ning Li,Ying Xu,Xiaofang Liu,Yi Ma,Zhen Huang,Huibo Luo,Changjun Hou,Danqun Huo
Antimonene (AMNFs) is a new kind of sp 2 -bonded honeycomb lattice two-dimensional material with strong rod-rail coupling, stability and hydrophilicity. Compared with graphene, antimonene has better sensitivity in DNA molecular sensing. We developed a suitable biosensor-Cd 2+ [email protected] @ZIF-67 nanocomposite for HER2 biomarker detection. Two-dimensional antimonene can be grown on the surface of ZIF-67 to enhance stability and biocompatibility. The aptamer chain can also be adsorbed on the surface of antimonene, and the complexes of the aptamer and the marker can be detached analytically after targeting the biomarker. The detection limit (LOD) was 4.853 fg/mL within 60 min, the detection range was 0–1000 pg/mL, and the LOD was lower than the existing HER2 aptamer biosensors. The results show that the biosensor has certain applicability and potential, and is expected to be a powerful tool for breast cancer diagnosis in the future.
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PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Gangsheng Zhang,Jianyang Gao,Jing Wang,Haifeng Lin,Jixiang Xu,Lei Wang
A N-doped carbon-wrapped Co 9 S 8 catalyst (N-C/Co 9 S 8 ) was prepared in this work by pyrolysis sulfurized-ZIF-67 and melamine mixture. The prepared catalyst was used to degrade tetracycline (TC) with peroxymonosulfate (PMS) as oxidant. The optimized catalyst could remove 96.8 % TC in 15 min with a rate constant of 0.196 min –1 . The degradation mechanism, intermediates, and possible pathway were discussed. It was found that pyridinic N, Co-N, Co species, S 2– , C-S-C, and C-SO x were active sites to activate PMS. The N-doped carbon (N-C) could facilitate electron transfer . The surface-bound ·OH, SO 4 •− , and ⋅O 2 − radicals, especially 1 O 2 and electron transfer mechanism contributed to TC degradation . The effects of solution pH, inorganic ions and humic acid on TC degradation were discussed. This study might prompt the development of other ZIF-67-derived sulfides for environmental remediation.
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高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Sihan Wang,Kai Yao,Zhiwei He,Bing Shao,Jianzhong Shen,Haiyang Jiang
ZIF-8 is a type of porous coordination metal-organic frameworks (MOFs) material with excellent adsorption properties. However, the inevitable acid-base sensitivity and low plasticity of ZIF-8 impede its application to the field of compound adsorption and separation. Here, a novel reusable monolithic MOFs foam material, polysaccharides (CMC & chitin) gels zeolitic imidazolate frameworks (PC-ZIF-8), has been developed to effectively adsorb five Phenolic Endocrine Disrupting Chemicals (PEDCs) from environmental water. In this study, the forming strategy of a continuous phase change sol-gel MOFs material was designed. The carboxymethyl cellulose and chitin hydrosol were used as the self-assembly medium for in-situ synthesizing sol-type MOFs by a one-step method. Several favorable characteristics of PC-ZIF-8 have been confirmed, including large surface area (619.47 m 2 /g), low density (<0.085 g/cm 3 ), high ZIF-8 loading rate (>80%, wt%), high structural strength, high acid, and alkali tolerance, and easy recyclability . The adsorption efficiency of PC-ZIF-8 for 5 BPs in water is 92.97%− 99.12%, and the maximum adsorption capacity is 120.1–172.9 mg/g. After simple regeneration treatment, PC-ZIF-8 has been recycled 5 times, and the overall recovery rate still remains above 80.0%. The results of this study indicate that PC-ZIF-8 is a reliable adsorbent for BPs in environmental water purification .
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 8
·4103-4112
·
IF 3.3
Ke Yang,Guoning Chen,Lu Wang,Miao Guo,Jiameng Xu,Yirong Ma,Zhimin Luo,Aiguo Zeng,Qiang Fu
Co-immobilization strategies are available to improve the catalytic activity, stability and reusability of enzymes. It has been frequently applied in recent year in reactions involving multi-step catalysis to optimize the performance. In this study, a zeolitic-imidazolate framework 8 (ZIF-8)-based nanoreactor (Chox&HRP@ZIF-8) including cholesterol oxidase (Chox) and horseradish peroxidase (HRP) was developed successfully. The Chox&HRP@ZIF-8 was characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction and Fourier transform infrared spectroscopy, respectively. The as-prepared materials were used as a biocatalytic system to realize the cascade reaction initiated by Chox and HRP. Next, the investigation of the catalytic activity and stability of Chox&HRP@ZIF-8 was performed in extreme environments. The results showed that the stability of the prepared Chox&HRP@ZIF-8 was significantly improved compared with that of free enzymes. In addition, the assay method for cholesterol detection developed based on Chox&HRP@ZIF-8 as the biocatalytic system showed high selectivity and good interference resistance. It was successfully applied to the determination of cholesterol in mice serum. It is worth mentioning that the relative activity of co-localized Chox&HRP remained above 60% after 5 cycles for cholesterol detection, confirming the feasibility of the multi-enzyme immobilization strategy using ZIF-8 as a carrier in the cascade reaction.
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高影响因子
FUEL
·
2023
·
IF 7.4
Qi Rong,Wenkai Huang,Fuhua Xu,Yanlan Wang,Changlong Wang,Xiang Liu
In spite of significant developments are accomplished in the exploration of H 2 and O 2 evolution upon water electrolysis/photolysis, this remains a challenge to design and develop ideal catalytic systems for this reaction and to isolate H 2 from H 2 -O 2 mixture with membranes. Herein, a series of ZIF-67-supported transition metal nanoparticles (TMNPs/ZIF-67), including Pt, Ir, Pd, Rh, Au and Ag, via immobilization of ultrafine TMNPs at the surface of ZIF-67, have been designed and developed for the selective H 2 generation from NH 3 BH 3 hydrolysis and O 2 evolution upon H 2 O 2 decomposition. In particular, the optimized nanocatalyst Pt/ZIF-67 presents the super-high catalytic property in the both H 2 evolution upon NH 3 BH 3 hydrolysis (689 mol(H 2 )·mol Pt -1 ·min −1 ) and O 2 evolution upon H 2 O 2 decomposition (979 mol(O 2 )·mol Pt -1 ·min −1) at 30 °C. Importantly, the selective “on–off” control for demand-based H 2 generation from NH 3 BH 3 hydrolysis was successfully realized by Zn 2+ /EDTA-2Na system. This highly efficient Pt/ZIF-67 proposed a new method for the promising potential application of ammonia borane and hydrogen peroxide as an economic and safe H 2 resp. O 2 carrier for fuel cell.
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高影响因子
Journal of Energy Storage
·
2023
·
IF 9.4
Xin Xu,Shang Wu,Yang Liu,Chaoyang Liu,Xin Sun,Shuo Tian,Lan Wu,Yuzhi Sun,Zhichao Wang,Quanlu Yang
The tubular microsphere structure is an effective structure for asymmetric supercapacitors due to its high specific surface area and porosity. It can slow down the volume shrinkage caused by redox process. In this paper, tubular-like NiMoO 4 ·xH 2 O microspheres were designed to reach a high specific capacity. The NiMoO 4 ·xH 2 O was prepared by hydrothermal method and subsequent annealing treatment showed a tubular microsphere structure with many particles uniformly distributed. And its specific capacity is 943 F g −1 at 1 A·g −1 and capacity retention is 73.4 % after 3000 cycles. The Bi 2 S 3 /C was selected as negative material to build an asymmetric supercapacitor (battery-type device). It exhibited an impressive specific capacity (419 F g −1 at 1 A g −1 ). It was worth noting that the battery-type devices built with NiMoO 4 ·xH 2 O and Bi 2 S 3 /C can achieve a specific energy of 27.1 Wh kg −1 at 2456.9 W kg −1 and capacity retention of 69.2 % after 5000 cycles. It was shown that NiMoO 4 -xH 2 O and Bi 2 S 3 /C as electrode materials have great potential and can enhance the energy storage application of supercapacitors.
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高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Na Yang,Hao Jiang,Longfei Zhang,Xiang Wang,Luhong Zhang,Yongli Sun,Bin Jiang
Spinel oxides can be considered effective heterogeneous catalysts in activating peroxymonosulfate (PMS) for wastewater decontamination . However, the intrinsic characteristics of agglomeration and metal ion leaching impede its further application. In this work, to further improve the catalytic efficiency and stability of the catalyst, ZIF-8 was employed as the candidate and further etched by tannic acid (TA) to obtain a core-shell structure with less mass transfer resistance. Following this, CoFe 2 O 4 was anchored on TA-ZIF-8 matrix via a hydrothermal method. Benefiting from the tailored core-shell structure and high activity of CoFe 2 O 4 , the as-prepared CoFe 2 O 4 @TA-ZIF-8 catalyst shortened the mass transfer distance of radical to target pollutant, thus realizing high radical utilization efficiency. Accordingly, 98.1% of tetracycline (TC) can be eliminated in 30 min with kinetic constants 3.15 times higher than pristine CoFe 2 O 4 . Besides, the TC degradation efficiency can still maintain 84.1% after five consecutive cycles with cobalt leaching lower than 0.306 mg/L, showing favorable stability compared with pristine CoFe 2 O 4 . Furthermore, electron paramagnetic resonance (EPR) and quenching experiments exhibited that singlet oxygen and sulfate radicals play dominant roles in TC degradation processes. This work fabricates an efficient CoFe 2 O 4 @TA-ZIF-8 heterogeneous catalyst for degrading refractory TC, which may possess potential applications in wastewater treatment .
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高影响因子
ChemNanoMat
·
2023
·Vol. 9
·期 10
·e202300310
·
IF 3.8
Xin Cui,Jiachen Zhang,Yitong Liu,Wen Shao,Yawen Tang,Hanjun Sun
Graphical A Ru-ZIF-8 nanozyme with both esterase like and peroxidase like activities were prepared for acetylcholine (ACh) detection. On the basis of the Ru-ZIF-8 nanozyme, a portable nanozyme strip was developed as a novel biosensor for detecting ACh, which was conducive to promoting the development of multiple enzyme cascade assays. In the present study, the incorporation of Ru into the framework of ZIF-8 resulted in that a Ru-ZIF-8 nanozyme with both esterase-like activity and peroxidase-like activity. Owing to the dual nanozymatic activities of Ru-ZIF-8 nanozyme, the acetylcholine (ACh) detection process utilized only one natural enzyme (choline oxidase), which greatly simplified the detection procedure. In the detection process, nanozyme Ru-ZIF-8 showed esterase-like activity to catalyze the hydrolysis of ACh to choline. Then the generated choline was oxidized by choline oxidase to generate H 2 O 2 . Finally, Ru-ZIF-8 with peroxidase-like activity was used to catalyze H 2 O 2 to oxidize 2,2′-azino-bis (3-ethylbenzothiazo-line-6-sulfonic acid) ammonium salt with a color change. As a result, the linear range for ACh was from 0.01 μM-22 μM with the detection limit (DL) of 5.5 nM. In addition, Ru-ZIF-8 was utilized to fabricate a portable detection test strip. Our work provided a simple, portable, low-cost, highly sensitive and selective assay for the detection of ACh, which paved the way for the development of multi enzyme cascade assays.
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高影响因子
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