scholarly journals Preparation of magnetic imprinted graphene oxide composite for catalytic degradation of Congo red under dark ambient conditions

2017 ◽  
Vol 76 (7) ◽  
pp. 1676-1686 ◽  
Author(s):  
Xiaochao Yang ◽  
Xiaoxiao You ◽  
Bin Zhang ◽  
Chuigen Guo ◽  
Chaosheng Yu
Keyword(s):  
Graphene Oxide ◽  
Congo Red ◽  
High Performance ◽  
Degradation Products ◽  
Low Cost ◽  
Physical Property Measurement System ◽  
Physical Property ◽  
Catalytic Degradation ◽  
Degradation Efficiency ◽  
Ambient Conditions

Magnetic imprinted N-doped P25/Fe3O4-graphene oxide (MIGNT) was prepared with methyl orange as the dummy template and pyrrole as functional monomer for catalytic degradation of Congo red (CR). Hummers method and the hydrothermal method were used to synthesize Fe3O4-GO and N-doped P25, respectively. The results of adsorption and degradation experiments showed that the adsorption capacity and catalytic degradation ability of the imprinted composite for CR were obviously higher than those of a non-imprinted one. Moreover, the effect factors on degradation efficiency of CR, such as the initial concentration of CR, catalysis time, pH of the solution and temperature, were investigated. The MIGNT was characterized by X-ray diffraction, Fourier transform infrared spectroscopy, transmission electron microscopy, a physical property measurement system and a thermal gravimetric analyzer. The degradation products of CR were detected with high performance liquid chromatography and a mass spectrometer. The MIGNT was a brand-new imprinted composite and had high degradation efficiency for CR under dark ambient conditions. The MIGNT could be recycled conveniently, due to its magnetic property, and could be used as an effective, environmentally friendly and low-cost catalytic degradation material for the treatment of water contaminated by CR.

Metal-organic framework derived metal oxide/reduced graphene oxide nanocomposite, a new tool for the determination of dipyridamole

2021 ◽  
Author(s):  
Naeime Salandari-Jolge ◽  
Ali A. Ensafi ◽  
Behzad Rezaei
Keyword(s):  
Myocardial Infarction ◽  
Graphene Oxide ◽  
High Performance ◽  
High Selectivity ◽  
Low Cost ◽  
Metal Organic Framework ◽  
Heart Patients ◽  
Reduced Graphene ◽  
Metal Organic

Dipyridamole is a prescribed medication used to treat cardiovascular diseases, angina pectoris, imaging tests for heart patients, and myocardial infarction. Therefore, high selectivity and sensitivity, low cost, and high-performance speed...

scholarly journals Low Dark Current and Performance Enhanced Perovskite Photodetector by Graphene Oxide as an Interfacial Layer

Nanomaterials ◽  
2022 ◽  
Vol 12 (2) ◽  
pp. 190
Author(s):  
Ali Hassan ◽  
Muhammad Azam ◽  
Yeong Hwan Ahn ◽  
Muhammad Zubair ◽  
Yu Cao ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Dark Current ◽  
High Performance ◽  
Carrier Transport ◽  
Defect Density ◽  
Low Cost ◽  
Degradation Process ◽  
Device Performance ◽  
Interface Engineering ◽  
Defect Passivation

Organic–inorganic hybrid perovskite photodetectors are gaining much interest recently for their high performance in photodetection, due to excellent light absorption, low cost, and ease of fabrication. Lower defect density and large grain size are always favorable for efficient and stable devices. Herein, we applied the interface engineering technique for hybrid trilayer (TiO2/graphene oxide/perovskite) photodetector to attain better crystallinity and defect passivation. The graphene oxide (GO) sandwich layer has been introduced in the perovskite photodetector for improved crystallization, better charge extraction, low dark current, and enhanced carrier lifetime. Moreover, the trilayer photodetector exhibits improved device performance with a high on/off ratio of 1.3 × 104, high responsivity of 3.38 AW−1, and low dark current of 1.55 × 10−11 A. The insertion of the GO layer also suppressed the perovskite degradation process and consequently improved the device stability. The current study focuses on the significance of interface engineering to boost device performance by improving interfacial defect passivation and better carrier transport.

High performance dielectric composites by latex compounding of graphene oxide-encapsulated carbon nanosphere hybrids with XNBR

2014 ◽  
Vol 2 (29) ◽  
pp. 11144-11154 ◽  
Author(s):  
Ming Tian ◽  
Qin Ma ◽  
Xiaolin Li ◽  
Liqun Zhang ◽  
Toshio Nishi ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Graphene Oxide ◽  
Elastic Modulus ◽  
High Performance ◽  
High Dielectric Constant ◽  
Low Cost ◽  
Low Dielectric ◽  
Low Elastic Modulus ◽  
High Dielectric ◽  
Latex Compounding

A novel dielectric composite with high dielectric constant (k), low dielectric loss, low elastic modulus and large actuated strain at a low electric field was prepared by a simple, low-cost and efficient method.

Synergistic effects of a TiNb2O7–reduced graphene oxide nanocomposite electrocatalyst for high-performance all-vanadium redox flow batteries

2018 ◽  
Vol 6 (28) ◽  
pp. 13908-13917 ◽  
Author(s):  
Anteneh Wodaje Bayeh ◽  
Daniel Manaye Kabtamu ◽  
Yu-Chung Chang ◽  
Guan-Cheng Chen ◽  
Hsueh-Yu Chen ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Graphene Oxide ◽  
High Performance ◽  
Freeze Drying ◽  
Synergistic Effects ◽  
Low Cost ◽  
Redox Flow Batteries ◽  
Reduced Graphene ◽  
Flow Batteries ◽  
Vanadium Redox

In this study, a simple, low-cost, and powerful titanium niobium oxidereduced graphene oxide (TiNb2O7–rGO) nanocomposite electrocatalyst was synthesized through dispersion and blending in aqueous solution followed by freeze-drying and annealing for all-vanadium redox flow batteries (VRFBs).

Low-cost, highly sensitive and stable pressure sensor based on glass fiber surfacing mat coated with graphene

2019 ◽  
Vol 13 (02) ◽  
pp. 2051002
Author(s):  
Shaowei Lu ◽  
Junchi Ma ◽  
Keming Ma ◽  
Shuai Wang ◽  
Xiangdong Yang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Glass Fiber ◽  
Pressure Sensor ◽  
High Performance ◽  
Low Cost ◽  
Epoxy Group ◽  
Pressure Sensors ◽  
Superior Performance ◽  
Filtration Method ◽  
Potential Applications

High-performance pressure sensors have caused widespread concern due to the potential applications in 3D-touch technology and wearable electronic devices. Herein, a new type of graphene pressure sensor based on the glass fiber surfacing mat coated with graphene oxide aqueous solution by a spray-vacuum filtration method and HI acid reduction method is reported. It is a simple and highly effective method to reduce graphene oxide films into highly conductive graphene films without destroying their integrity and flexibility at a low temperature based on the nucleophilic substitution reaction. The FTIR, SEM and conductivity tests indicate that the optimum time for graphene oxide to be reduced is 30[Formula: see text]min, under this condition enter the epoxy group has been reacted without damaging the regular sp2 hybrid C atom structure in graphene. The conductivity of the graphene pressure sensor is increased significantly to 23260[Formula: see text]S/m. The monotonic compressing test for 100[Formula: see text]Pa/s and the test of the metal block placement and removal demonstrate that the sensor exhibits relatively high linearity of 99.74% between the response and pressure, the advantage makes the sensor monitor pressure more accurately. More importantly, the pressure sensor based on the glass fiber surfacing mat coated with graphene shows extremely high sensitivity (0.169[Formula: see text][Formula: see text]), fast response time (251[Formula: see text]ms) and good stability for 1000 cycles. Based on its superior performance, it also demonstrates potential applications in measuring pressure and human body’s motions.

Versatile self-assembled graphene oxide membranes obtained under ambient conditions by using a water–ethanol suspension

2017 ◽  
Vol 5 (5) ◽  
pp. 2132-2142 ◽  
Author(s):  
Liviu Cosmin Cotet ◽  
Klára Magyari ◽  
Milica Todea ◽  
Mircea Cristian Dudescu ◽  
Virginia Danciu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Self Assembly ◽  
Low Cost ◽  
Assembly Process ◽  
Ambient Conditions ◽  
Free Standing ◽  
Air Liquid Interface ◽  
Oxide Membranes ◽  
Ethanol Fraction ◽  
Graphene Oxide Membranes

The study reports a low cost and scalable pathway for preparing free-standing GO membranes by a self-assembly process under ambient conditions at an air–liquid interface of an isopycnic sorted GO water–ethanol fraction.

A novel core-shell polyaniline/graphene oxide/copper nanocomposite for high performance and low-cost supercapacitors

2018 ◽  
Vol 73 (1) ◽  
pp. 119-129 ◽  
Author(s):  
Yu Ma ◽  
Dongyu Zhao ◽  
Yongheng Chen ◽  
Jing Huang ◽  
Zhixin Zhang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
High Performance ◽  
Low Cost ◽  
Core Shell

Fluorination-assisted dealloying synthesis of porous reduced graphene oxide-FeF2@carbon for high-performance lithium-ion battery and the exploration of its electrochemical mechanism

2021 ◽  
Author(s):  
Jianming Li ◽  
yan meng ◽  
Yujue Wang ◽  
Xiaopeng Li ◽  
Yingling Lai ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Lithium Ion Battery ◽  
Reduced Graphene Oxide ◽  
Volume Change ◽  
High Performance ◽  
Low Cost ◽  
Lithium Ion ◽  
Reduced Graphene ◽  
High Theoretical Capacity ◽  
Electrochemical Mechanism

With the high theoretical capacity and low cost, the FeF2 possesses great potential in the application of the next-generation lithium-ion battery. However, poor conductivity and dramatic volume change during the...

A MoS2 nanosheet–reduced graphene oxide hybrid: an efficient electrocatalyst for electrocatalytic N2 reduction to NH3 under ambient conditions

2019 ◽  
Vol 7 (6) ◽  
pp. 2524-2528 ◽  
Author(s):  
Xianghong Li ◽  
Xiang Ren ◽  
Xuejing Liu ◽  
Jinxiu Zhao ◽  
Xu Sun ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
High Performance ◽  
Ambient Conditions ◽  
Stable Catalyst ◽  
Reduced Graphene ◽  
Mos2 Nanosheet

A MoS2 nanosheet–reduced graphene oxide hybrid behaves as a high-performance and stable catalyst for ambient electrochemical N2-to-NH3 fixation.

Sign in / Sign up

Export Citation Format

Share Document