Preparation of reduced graphene oxide by infrared irradiation induced photothermal reduction.
نویسندگان
چکیده
We present a green and scalable route toward the formation of reduced graphene oxide (r-GO) by photothermal reduction induced by infrared (IR) irradiation, utilizing a bathroom IR lamp as the source of IR light. Thermogravimetric analysis, Raman, Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy confirm the reduction of r-GO by IR light. Ultraviolet-visible-infrared spectra indicate that adsorption of IR light by original GO films is less than that of UV and visible light; but when GO is exposed to IR light, its adsorption of IR light increases very rapidly with time. The influence of the power density of the IR light on the structure and properties of r-GO was investigated. At high IR power density, the reduction reaction was so fierce that r-GO became highly porous due to the rapid degassing and exfoliation of GO sheets. The r-GO powder revealed good performance as the anode material for lithium ion batteries. At relatively low IR power density, the reduction process was found to be mild but relatively slow. Crack-free and uniform conductive r-GO thin films with a volume conductivity of 1670 S m(-1) were then prepared by two-step IR irradiation, i.e. first at low IR power density and then at high IR power density. Moreover, the r-GO films were also observed to exhibit obvious and reversible IR light-sensing behavior.
منابع مشابه
The preparation of reduced graphene oxide and its photothermal therapy of gliomas in vivo and in vitro
Objective: To investigate the preparation of reduced graphene oxide (reduced-NGO) and its photothermal therapy of gliomas in vivo and in vitro. Methods: Hydrazine hydrate reduction method was used to reduce graphene oxide (NGO). The morphology, diameter, stability and UV-VIS absorbance of reduced-NGO were detected firstly; and then, the photothermal conversion effect of reduced-NGO under 2 w/cm...
متن کاملIn vivo evaluation of the combination effect of near- infrared laser and PLGA polymer containing 5- fluorouracil – loaded Nano-graphene oxide
Introduction: Recently, nanographene oxide (NGO) is proven to be as a great candidate for drug delivery, and phototherapies cancer. Photothermal sensitivity of NGO and its optical absorption in the NIR region lead to photothermal ablation of tumors. Nevertheless, the major drawback of GO is its toxicity in biological systems, To overcome this problem, nanoscale GO prepare with...
متن کاملMicrobial Reduction of Graphene Oxide by Lactobacillus Plantarum
Here, we report that the reduced graphene oxide nanosheets were successfully synthesized using the Lactobacillus plantarum biomass in a simple, environmentally friendly and scalable manner. We produced graphene oxide by oxidization and exfoliation of graphite flakes with modified Hummer's method and then reduced to reduced graphene oxide by using Lactobacillus plantarum biomass as a ...
متن کاملPreparation and Characterization of Reduced Graphene Oxide Doped in Sol-Gel Derived Silica for Application in Electrochemical Double-Layer Capacitors
In this study, a new graphene ceramic composite (GCC) was prepared based on the reduced grapheneoxide (rGO) doped in sol-gel derived silica. The GCC was prepared by dispersing rGO nanosheets intothe sol-gel precursors containing methyl triethoxysilane, methanol and hydrochloric acid solution.During an acid catalyzed hydrolyze reaction and gelation proc...
متن کاملFacile and green reduction of covalently PEGylated nanographene oxide via a ‘water-only’ route for high-efficiency photothermal therapy
A facile and green strategy is reported for the fabrication of nanosized and reduced covalently PEGylated graphene oxide (nrGO-PEG) with great biocompatibility and high near-infrared (NIR) absorbance. Covalently PEGylated nGO (nGO-PEG) was synthesized by the reaction of nGO-COOH and methoxypolyethylene glycol amine (mPEG-NH2). The neutral and purified nGO-PEG solution was then directly bathed i...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Nanoscale
دوره 5 19 شماره
صفحات -
تاریخ انتشار 2013