scholarly journals The pH dependent reactions of graphene oxide with small molecule thiols

RSC Advances ◽  
2018 ◽  
Vol 8 (33) ◽  
pp. 18388-18395 ◽  
Author(s):  
Al de Leon ◽  
Michael Mellon ◽  
Joey Mangadlao ◽  
Rigoberto Advincula ◽  
Emily Pentzer
Keyword(s):  
Graphene Oxide ◽  
Small Molecule ◽  
Solution Ph ◽  
Ph Dependent ◽  
Carbon Based

Graphene oxide (GO), a heterogenous 2D carbon-based material, is functionalized or reduced with ethane thiol depending on solution pH.

A new luminol chemiluminescence sensor for glucose based on pH-dependent graphene oxide

The Analyst ◽  
2013 ◽  
Vol 138 (15) ◽  
pp. 4393 ◽  
Author(s):  
Minjia Hao ◽  
Na Liu ◽  
Zhanfang Ma
Keyword(s):  
Graphene Oxide ◽  
Luminol Chemiluminescence ◽  
Ph Dependent

Graphene Oxide/Perylene-Aniline Electrochemiluminescence Platform for Protein Detection Based on Molecule Recognition

2021 ◽  
Author(s):  
Peng Yin ◽  
Wei Zhang ◽  
Lei Shang ◽  
Rong-Na Ma ◽  
Liping Jia ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Folic Acid ◽  
Small Molecule ◽  
Folate Receptor ◽  
Protein Detection ◽  
Single Strand ◽  
Molecule Recognition

Most biosensors for protein folate receptor(FR) detection based on small molecule folic acid(FA) recognition usually introduced FA linked single strand DNA(FA-ssDNA) and nuclease to promote sensitivity, which increased expenses and...

pH-Sensitive graphene oxide/sodium alginate/polyacrylamide nanocomposite semi-IPN hydrogel with improved mechanical strength

RSC Advances ◽  
2015 ◽  
Vol 5 (108) ◽  
pp. 89083-89091 ◽  
Author(s):  
Huijuan Zhang ◽  
Xianjuan Pang ◽  
Yuan Qi
Keyword(s):  
Graphene Oxide ◽  
Mechanical Strength ◽  
Sodium Alginate ◽  
Ph Sensitive ◽  
Swelling Behavior ◽  
Ph Dependent

A pH-sensitive and mechanically strong graphene oxide/sodium alginate/polyacrylamide nanocomposite semi-IPN hydrogel was designed and prepared. The composite semi-IPN hydrogel showed superior mechanical strength and pH-dependent swelling behavior.

Photocatalytic Activity of Reduced Graphene Oxide-SnSe Nanohybrids with Efficiency Interface Effect

NANO ◽  
2017 ◽  
Vol 12 (03) ◽  
pp. 1750032 ◽  
Author(s):  
H.-Y. He
Keyword(s):  
Photocatalytic Activity ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Malachite Green ◽  
Interface Effect ◽  
Solution Ph ◽  
Photodegradation Efficiency ◽  
Reduced Graphene ◽  
Narrow Bandgap ◽  
Photocatalytic Activities

Reduced graphene oxide-SnSe (rGO-SnSe) nanohybrids were synthesized with a solution chemical reaction at room temperature. The nanohybrids were characterized by various techniques for their microstructural and photocatalytic activities in photodegradation of alkaline dye malachite green in the water. The effects of rGO/SnSe ratio, initial solution pH, and H2O2 concentration on the photodegradation efficiency were studied. The SnSe nanocrystallines with nanoscale size and narrow bandgap were formed and uniformly adhered on the rGO surface. Raman analysis confirmed the reduction of GO. The experimental results indicated that the nanohybrids showed excellent sunlight-excited photocatalytic activity in degrading malachite green in the water. Significantly, the nanohybrids showed remarkable photo-Fenton-like catalytic activity. The photodegradation rates of the hybrids were greater than that of SnSe nanoparticles, increased with increasing rGO/SnSe ratio, and related to operation parameters. High photocatalytic activities were ascribed to the efficiency interface effect that was confirmed by the calculations of band energy level and photoconductivity. The TOC measurement further verified the photodegradation results. The nanoparticles and nanohybrids also showed excellent reusability.

scholarly journals The pH-dependent structural and tribological behaviour of aqueous graphene oxide suspensions

2017 ◽  
Vol 116 ◽  
pp. 460-469 ◽  
Author(s):  
Anshun He ◽  
Shuiquan Huang ◽  
Jung-Ho Yun ◽  
Zhengyi Jiang ◽  
Jason Stokes ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Tribological Behaviour ◽  
Ph Dependent

Surface modification by graphene oxide: An efficient strategy to improve the performance of activated carbon based supercapacitors

2017 ◽  
Vol 28 (12) ◽  
pp. 2285-2289 ◽  
Author(s):  
Weishi Du ◽  
Yaokang Lv ◽  
Hongliang Lu ◽  
Zaihua Chen ◽  
Dominic S. Wright ◽  
...  
Keyword(s):  
Surface Modification ◽  
Graphene Oxide ◽  
Activated Carbon ◽  
Efficient Strategy ◽  
Carbon Based

High-performance carbon-based CsPbI2Br perovskite solar cells via small molecule modification

2021 ◽  
Vol 516 ◽  
pp. 230676
Author(s):  
Qianji Han ◽  
Fengyang Yu ◽  
Liang Wang ◽  
Shuzhang Yang ◽  
Xiaoyong Cai ◽  
...  
Keyword(s):  
Solar Cells ◽  
Small Molecule ◽  
High Performance ◽  
Perovskite Solar Cells ◽  
Carbon Based

scholarly journals Breakthroughs in the Design of Novel Carbon-Based Metal Oxides Nanocomposites for VOCs Gas Sensing

Nanomaterials ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 1485 ◽  
Author(s):  
Eleonora Pargoletti ◽  
Giuseppe Cappelletti
Keyword(s):  
Graphene Oxide ◽  
Active Sites ◽  
Gas Sensing ◽  
Spillover Effect ◽  
Gas Diffusion ◽  
Hybrid Features ◽  
Multi Wall Carbon Nanotubes ◽  
Recovery Times ◽  
Electron Migration ◽  
Carbon Based

Nowadays, the detection of volatile organic compounds (VOCs) at trace levels (down to ppb) is feasible by exploiting ultra-sensitive and highly selective chemoresistors, especially in the field of medical diagnosis. By coupling metal oxide semiconductors (MOS e.g., SnO2, ZnO, WO3, CuO, TiO2 and Fe2O3) with innovative carbon-based materials (graphene, graphene oxide, reduced graphene oxide, single-wall and multi-wall carbon nanotubes), outstanding performances in terms of sensitivity, selectivity, limits of detection, response and recovery times towards specific gaseous targets (such as ethanol, acetone, formaldehyde and aromatic compounds) can be easily achieved. Notably, carbonaceous species, highly interconnected to MOS nanoparticles, enhance the sensor responses by (i) increasing the surface area and the pore content, (ii) favoring the electron migration, the transfer efficiency (spillover effect) and gas diffusion rate, (iii) promoting the active sites concomitantly limiting the nanopowders agglomeration; and (iv) forming nano-heterojunctions. Herein, the aim of the present review is to highlight the above-mentioned hybrid features in order to engineer novel flexible, miniaturized and low working temperature sensors, able to detect specific VOC biomarkers of a human’s disease.

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