By a News Reporter-Staff News Editor at Journal of Engineering -- Investigators discuss new findings in Chemical Engineering. According to news originating from Chengdu, People's Republic of China, by VerticalNews correspondents, research stated, "We report a rapid, environmentally-friendly and cost-effective route for the preparation of a graphene-based nanomaterial, carboxyl graphene (aka. reduced graphene oxide, RGO) from graphene oxide (GO). Carboxyl graphene was prepared on the scale of several grams through the reduction of GO by thiourea dioxide (TUD) at a relatively low temperature (40 degrees C) in an alkaline medium (pH = 10)."
Our news journalists obtained a quote from the research from Sichuan University, "The reduction of GO was confirmed by FT-IR, UV-vis, X-ray photoelectron, and Raman spectroscopy. In addition, this reduction was also confirmed by thermal gravimetric analysis, X-ray diffraction, scanning electron microscopy (SEM), transmission electron microscopy (TEM) and atomic force microscopy (AFM). Characterizations of these materials demonstrated that selective reduction of the epoxy and carbonyl groups occurred on the surface of GO, while carboxyl groups were left behind. In addition, the conjugation of the carbons in the structure was restored through this reduction and a single-layer of carboxyl graphene (with a thickness of 0.80 nm, as observed by AFM) was obtained under these conditions. Carboxyl graphene had a high surface area (of 454.52 m(2) g(-1)) and contained approximately 6.9 +/- 1.6 mmol of carboxyl groups per gram of material, as determined via Boehm titration."
According to the news editors, the research concluded: "The mechanism for selective reduction of the epoxy and carbonyl groups on GO to form carboxyl graphene by TUD is proposed and discussed in detail."
For more information on this research see: A rapid low-temperature synthetic method leading to large-scale carboxyl graphene. Chemical Engineering Journal, 2014;236():471-479. Chemical Engineering Journal can be contacted at: Elsevier Science Sa, PO Box 564, 1001 Lausanne, Switzerland. (Elsevier - www.elsevier.com; Chemical Engineering Journal - www.elsevier.com/wps/product/cws_home/601273)
The news correspondents report that additional information may be obtained from N. Pan, Sichuan University, Inst Nucl Sci & Technol, MOE Key Lab Radiat Phys & Technol, Chengdu 610064, People's Republic of China. Additional authors for this research include D.B. Guan, Y.T. Yang, Z.L. Huang, R.B. Wang, Y.D. Jin and C.Q. Xia.
Keywords for this news article include: Asia, Chengdu, Chemical Engineering, People's Republic of China
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