scholarly journals One-Step Synthesis of Hierarchical Micro-Mesoporous SiO2/Reduced Graphene Oxide Nanocomposites for Adsorption of Aqueous Cr(VI)

2017 ◽  
Vol 2017 ◽  
pp. 1-10 ◽  
Author(s):  
Guiyun Yi ◽  
Baolin Xing ◽  
Huihui Zeng ◽  
Xiaodong Wang ◽  
Chuanxiang Zhang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Mesoporous Structure ◽  
Raw Material ◽  
Reduced Graphene ◽  
Composite Formation ◽  
One Step ◽  
Ft Ir ◽  
Acidic Conditions ◽  
Adsorption Desorption

A novel micro-mesostructured SiO2/reduced graphene oxide (RGO) nanocomposite was successfully synthesized by means of simple one-step hydrothermal method under acidic conditions using tetraethoxysilane (TEOS) and graphene oxide (GO) as the raw material. The nanocomposites were characterized by TEM, XRD, FT-IR, TG-DSC, and N2 adsorption-desorption. The results showed that GO was partially reduced to RGO without adding any reducing agent and SiO2 nanoparticles (ca. 10 nm) were uniformly anchored on the surface of RGO. The optimized composite contained 75 wt.% SiO2 and possessed hierarchical micro-mesoporous structure with surface area of 676 m2/g. The adsorption performance of synthesized SiO2/RGO samples was investigated by removal efficiency of Cr(VI) ions in wastewater. The Cr(VI) adsorption reached equilibrium in 30 min and 98.8% Cr(VI) adsorption efficiency was achieved at pH = 2 at 35°C. Stability tests showed that SiO2 nanoparticles effectively prevented RGO from the restacking. The mechanisms of composite formation and for Cr(VI) adsorption were suggested.

One-step hydrothermal treatment to fabricate Bi2WO6-reduced graphene oxide nanocomposites for enhanced visible light photoelectrochemical performance

2017 ◽  
Vol 5 (20) ◽  
pp. 3718-3727 ◽  
Author(s):  
Saibo Chen ◽  
Hao Nan ◽  
Xuan Zhang ◽  
Yuting Yan ◽  
Zhou Zhou ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Visible Light ◽  
Reduced Graphene Oxide ◽  
Hydrothermal Treatment ◽  
Solvothermal Method ◽  
Photoelectrochemical Performance ◽  
Reduced Graphene ◽  
One Step

Bi2WO6 functionalized reduced oxide nanocomposites were prepared by a one-step solvothermal method and their photoelectrochemical performance was greatly improved.

One-step Functionalization of Mildly and Strongly Reduced Graphene Oxide with Maleimide: An Experimental and Theoretical Investigation of the Diels-Alder [4+2] Cycloaddition Reaction

2021 ◽  
Author(s):  
Alfonso Ferretti ◽  
Sourab Sinha ◽  
Luca Sagresti ◽  
Esteban Araya-Hermosilla ◽  
Mirko Prato ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Large Scale ◽  
Cycloaddition Reaction ◽  
Diels Alder ◽  
Reduced Form ◽  
Graphene Nanocomposites ◽  
Exfoliated Graphene ◽  
Reduced Graphene ◽  
One Step

For large-scale graphene applications, such as the production of polymer-graphene nanocomposites, exfoliated graphene oxide (GO) and its reduced form (rGO) are presently considered very suitable starting material, showing enhanced chemical...

scholarly journals Simple synthesis of ZnO nanoparticles on N-doped reduced graphene oxide for the electrocatalytic sensing of l-cysteine

RSC Advances ◽  
2017 ◽  
Vol 7 (56) ◽  
pp. 35004-35011 ◽  
Author(s):  
Suling Yang ◽  
Gang Li ◽  
Chen Qu ◽  
Guifang Wang ◽  
Dan Wang
Keyword(s):  
Graphene Oxide ◽  
Low Temperature ◽  
Reduced Graphene Oxide ◽  
Zno Nanoparticles ◽  
Low Cost ◽  
Hydrothermal Process ◽  
Simple Synthesis ◽  
Zno Nanoparticle ◽  
Reduced Graphene ◽  
One Step

A new kind of ZnO nanoparticle/N-doped reduced graphene oxide nanocomposite (ZnONPs/N-rGO) was synthesized through a low temperature, low-cost and one step hydrothermal process.

One-step synthesis of reduced graphene oxide sheathed zinc oxide nanoclusters for the trace level detection of bisphenol A in tissue papers

2018 ◽  
Vol 161 ◽  
pp. 699-705 ◽  
Author(s):  
Muthumariappan Akilarasan ◽  
Sakthivel Kogularasu ◽  
Shen-Ming Chen ◽  
Tse-Wei Chen ◽  
Shih-Hao Lin
Keyword(s):  
Zinc Oxide ◽  
Graphene Oxide ◽  
Bisphenol A ◽  
Reduced Graphene Oxide ◽  
Trace Level ◽  
Reduced Graphene ◽  
One Step

Simultaneous Electrochemical Detection of Multiple Heavy-Metal Ions Based on Furfural/Reduced Graphene Oxide Composites

2021 ◽  
Author(s):  
Xiaoyun Xu ◽  
Xiaoyi Lv ◽  
Fei Tan ◽  
Yanping Li ◽  
Chao Geng ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Graphene Oxide ◽  
Metal Ions ◽  
Reduced Graphene Oxide ◽  
Heavy Metal Ions ◽  
Simultaneous Detection ◽  
Reduced Graphene ◽  
The Matrix ◽  
One Step ◽  
Oxide Composites

Abstract An efficient and sensitive electrochemical sensor for simultaneous detection of heavy metal ions was developed based on furfural/reduced graphene oxide composites (FF/RGO). The preparation of FF/RGO were performed through a one-step high-pressure assisted hydrothermal treatment, which is recommended as a green, convenient, and efficient way for the reduction of graphene oxide and the production of FF/RGO composites. RGO not only serves as the skeleton for furfural loading but also improves the conductivity of the composites in the matrix. FF/RGO with large specific surface area and abundant oxygen-containing functional groups was used to provide more binding sites for the effificient adsorption of heavy-metal ions due to the interaction between hydrophilic groups (-COOH, -OH, and -CHO) and metal cations. The developed sensor showed identifiable electrochemical response toward the heavy metal ions separately and simultaneously, exhibiting superior stability, outstanding sensitivity, selectivity and excellent analytical performance. Impressively, the sensor developed in this experiment has been successfully applied to the simultaneous determination of various heavy metal ions in actual samples, which has definitely exhibited a promising prospect in practical application.

scholarly journals Nano-inclusion in one step: spontaneous ice-templating of porous hierarchical nanocomposites for selective hydrogen release

2019 ◽  
Vol 3 (2) ◽  
pp. 396-400 ◽  
Author(s):  
Simon Champet ◽  
Jan van den Berg ◽  
Robert Szczesny ◽  
Agata Godula-Jopek ◽  
Duncan H. Gregory
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Ammonia Borane ◽  
Onset Temperature ◽  
Hydrogen Release ◽  
Aqueous Suspensions ◽  
Reduced Graphene ◽  
One Step ◽  
Ice Templating

3-D nanocomposites of (reduced) graphene oxide and ammonia borane can be fabricated in a one-step ice templating process from aqueous suspensions. The nanocomposites release hydrogen at a reduced onset temperature, suppressing the release of diborane, borazine and ammonia.

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