scholarly journals Fabrication of Co3O4/NiCo2O4 Nanocomposite for Detection of H2O2 and Dopamine

Biosensors ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 452
Author(s):  
Tianjiao Liu ◽  
Xiaoyuan Zhang ◽  
Kun Fu ◽  
Nan Zhou ◽  
Jinping Xiong ◽  
...  
Keyword(s):  
Metal Ion ◽  
High Selectivity ◽  
Metal Organic Framework ◽  
Accessible Surface Area ◽  
Detection Range ◽  
Calcination Process ◽  
Long Term Stability ◽  
Metal Organic ◽  
Accessible Surface

Herein, the Co3O4/NiCo2O4 nanocomposite has been prepared as a novel electrochemical sensor to accurately detect hydrogen peroxide (H2O2) and glucose. ZIF-67 is a metal-organic framework (MOF) with Co as the center metal ion. Co3O4 can be obtained by calcination of ZIF-67 at 700 °C, which can retain the structure of ZIF-67. The hollow Co3O4 nanocrystal was synthesized based on a calcination process of ZIF-67. This open structure can promote the whole Co3O4/NiCo2O4 nanocomposite larger accessible surface area and reactive sites. Co3O4 has good electrocatalytic performance, which has been applied in many fields. Moreover, H2O2 and dopamine sensing tests indicate that the as-prepared non-enzymatic electrochemical biosensor has good detection properties. The testing results indicate the as-prepared biosensor has a wide detection range, low detection limit, high selectivity, and long-term stability. These testing results suggest the potential application in food security, biomedicine, environmental detection, and pharmaceutical analysis.

scholarly journals Highly CO Selective Trimetallic Metal-Organic Framework Electrocatalyst for the Electrochemical Reduction of CO2

Catalysts ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 537
Author(s):  
Tran-Van Phuc ◽  
Jin-Suk Chung ◽  
Seung-Hyun Hur
Keyword(s):  
High Current Density ◽  
Metal Organic Framework ◽  
Faradaic Efficiency ◽  
Onset Potential ◽  
Long Term Stability ◽  
Metal Organic ◽  
Reduction Of Co2 ◽  
Electrocatalytic Reduction Of Co2 ◽  
Organic Framework

Pd, Cu, and Zn trimetallic metal-organic framework electrocatalysts (PCZs) based on benzene-1,3,5-tricarboxylic were synthesized using a simple solvothermal synthesis. The as-synthesized PCZ catalysts exhibited as much as 95% faradaic efficiency towards CO, with a high current density, low onset potential, and excellent long-term stability during the electrocatalytic reduction of CO2.

scholarly journals Facile one-pot solvothermal preparation of two-dimensional Ni-based metal–organic framework microsheets as a high-performance supercapacitor material

RSC Advances ◽  
2021 ◽  
Vol 11 (14) ◽  
pp. 8362-8366
Author(s):  
Zhaohua Li ◽  
Yuan Sun ◽  
Rui Hu ◽  
Shuai Ye ◽  
Jun Song ◽  
...  
Keyword(s):  
High Performance ◽  
Metal Organic Framework ◽  
Two Dimensional ◽  
Supercapacitor Electrode ◽  
One Pot ◽  
Long Term Stability ◽  
Metal Organic ◽  
Solvothermal Preparation ◽  
Organic Framework

Two-dimensional Ni-based metal–organic framework microsheets (Ni-MOFms) were synthesized via a facial one-pot solvothermal approach and exhibited good specific capacities and excellent long-term stability when used for a supercapacitor electrode.

scholarly journals Development of a pH-sensitive functionalized metal organic framework: in vitro study for simultaneous delivery of doxorubicin and cyclophosphamide in breast cancer

RSC Advances ◽  
2021 ◽  
Vol 11 (53) ◽  
pp. 33723-33733
Author(s):  
Ragini Singh ◽  
Binayak Kumar ◽  
Ram Krishna Sahu ◽  
Soni Kumari ◽  
Chandan Bhogendra Jha ◽  
...  
Keyword(s):  
Metal Organic Framework ◽  
Drug Loading ◽  
In Vitro Study ◽  
Long Term Stability ◽  
Specific Targeting ◽  
Metal Organic ◽  
High Drug Loading ◽  
Dual Drug

Exploration of an efficient dual-drug based nanocarrier with high drug loading capacity, specific targeting properties, and long-term stability is highly desirable in cancer therapy.

In-plane intergrowth CoS2/MoS2 nanosheets: binary metal–organic framework evolution and efficient alkaline HER electrocatalysis

2020 ◽  
Vol 8 (22) ◽  
pp. 11435-11441 ◽  
Author(s):  
Peng Liu ◽  
Jianyue Yan ◽  
Jianxin Mao ◽  
Jiawen Li ◽  
Dongxue Liang ◽  
...  
Keyword(s):  
Metal Organic Framework ◽  
Mos2 Nanosheets ◽  
Term Stability ◽  
Long Term Stability ◽  
Ultrathin Nanosheets ◽  
Binary Metal ◽  
Metal Organic ◽  
Organic Framework

Bi-metallic MOF-derived in-plane intergrowth CoS2/MoS2 ultrathin nanosheets exhibit ultralow overpotential and long-term stability for alkaline HER electrocatalysis.

scholarly journals Construction of a Luminescent Cadmium-Based Metal–Organic Framework for Highly Selective Discrimination of Ferric Ions

Molecules ◽  
2021 ◽  
Vol 26 (22) ◽  
pp. 6847
Author(s):  
Li-Li Xu ◽  
Qiu-Feng Zhang ◽  
Dong Wang ◽  
Guang-Wei Wu ◽  
Hong Cai
Keyword(s):  
Metal Ion ◽  
High Selectivity ◽  
Solvothermal Method ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Selective Recognition ◽  
Luminescent Intensity ◽  
Ferric Ions ◽  
Quenching Efficiency ◽  
Metal Organic

Fluorescent metal–organic frameworks (MOFs) are ideal materials for sensors because of their adjustable pore size and functional groups, which provide them with favorable metal ion selective recognition. In this paper, a new cadmium-based MOF was synthesized using Cd(NO3)2·4H2O and 3,3′,5,5′-biphenyltetracarboxylic acid by solvothermal method. CdBPTC owned three types of channels with dimensions of approximately 8.4 × 8.3 Å, 6.0 × 5.2 Å, 9.7 × 8.4 Å along a, b, and c axis, respectively. This MOF has high selectivity to ferric ions and shows excellent anti-inference ability toward many other cations. The results indicate that the fluorescence quenching efficiency of CdBPTC is close to 100% when the concentration of Fe3+ reaches 1.0 × 10−3 mol·L−1. Moreover, the luminescent intensity at 427 nm presents a linear relationship at a concentration range of 2.0 × 10−4~7.0 × 10−4 mol·L−1, which can be quantitatively expressed by the linear Stern–Volmer equation I0/I = 8489 [Fe3+] − 0.1400, which is comparable to the previously reported better-performing materials. Competitive energy absorption and ion exchange may be responsible for the variation in fluorescence intensity of CdBPTC in different Fe3+ concentrations.

Metal–organic-framework-derived porous 3D heterogeneous NiFex/NiFe2O4@NC nanoflowers as highly stable and efficient electrocatalysts for the oxygen-evolution reaction

2019 ◽  
Vol 7 (37) ◽  
pp. 21338-21348 ◽  
Author(s):  
Jia Zhao ◽  
Xu Zhang ◽  
Ming Liu ◽  
Yi-Zhan Jiang ◽  
Min Wang ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Metal Organic Framework ◽  
Term Stability ◽  
Long Term Stability ◽  
Metal Organic ◽  
Low Overpotential ◽  
Organic Framework

Metal–organic-framework-derived porous 3D heterogeneous NiFex/NiFe2O4@NC nanoflowers were prepared as an oxygen-evolution reaction electrocatalyst that exhibit a low overpotential of 262 mV and long-term stability of up to 150 h.

scholarly journals Leveraging Nanocrystal HKUST-1 in Mixed-Matrix Membranes for Ethylene/Ethane Separation

Membranes ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 74 ◽  
Author(s):  
Chong Yang Chuah ◽  
S.A.S.C. Samarasinghe ◽  
Wen Li ◽  
Kunli Goh ◽  
Tae-Hyun Bae
Keyword(s):  
Metal Organic Framework ◽  
Accessible Surface Area ◽  
Gas Permeation ◽  
Mixed Matrix Membranes ◽  
Mixed Matrix Membrane ◽  
Mixed Matrix ◽  
Membrane Fabrication ◽  
Metal Organic ◽  
Accessible Surface ◽  
Matrix Membranes

The energy-intensive ethylene/ethane separation process is a key challenge to the petrochemical industry. HKUST-1, a metal–organic framework (MOF) which possesses high accessible surface area and porosity, is utilized in mixed-matrix membrane fabrication to investigate its potential for improving the performance for C2H4/C2H6 separation. Prior to membrane fabrication and gas permeation analysis, nanocrystal HKUST-1 was first synthesized. This step is critical in order to ensure that defect-free mixed-matrix membranes can be formed. Then, polyimide-based polymers, ODPA-TMPDA and 6FDA-TMPDA, were chosen as the matrices. Our findings revealed that 20 wt% loading of HKUST-1 was capable of improving C2H4 permeability (155% for ODPA-TMPDA and 69% for 6FDA-TMPDA) without excessively sacrificing the C2H4/C2H6 selectivity. The C2H4 and C2H6 diffusivity, as well as solubility, were also improved substantially as compared to the pure polymeric membranes. Overall, our results edge near the upper bound, confirming the effectiveness of leveraging nanocrystal HKUST-1 filler for performance enhancements in mixed-matrix membranes for C2H4/C2H6 separation.

Sign in / Sign up

Export Citation Format

Share Document