The chemistry of graphene oxide is discussed in this critical review Particular emphasis is directed toward the synthesis of graphene oxide, as well as its structure Graphene oxide as a substrate for a variety of chemical transformations, including its reduction to graphene-like materials, is also discussed This review will be of value to synthetic chemists interested in this emerging field of materials science, as well as those investigating applications of graphene who would find a more thorough treatment of the chemistry of graphene oxide useful in understanding the scope and limitations of current approaches which utilize this material (91 references)

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The chemistry of graphene oxide

There is intense interest in graphene in fields such as physics, chemistry, and materials science, among others. Interest in graphene's exceptional physical properties, chemical tunability, and potential for applications has generated thousands of publications and an accelerating pace of research, making review of such research timely. Here is an overview of the synthesis, properties, and applications of graphene and related materials (primarily, graphite oxide and its colloidal suspensions and materials made from them), from a materials science perspective.

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Graphene and Graphene Oxide: Synthesis, Properties, and Applications

The richness of optical and electronic properties of graphene attracts enormous interest. Graphene has high mobility and optical transparency, in addition to flexibility, robustness and environmental stability. So far, the main focus has been on fundamental physics and electronic devices. However, we believe its true potential lies in photonics and optoelectronics, where the combination of its unique optical and electronic properties can be fully exploited, even in the absence of a bandgap, and the linear dispersion of the Dirac electrons enables ultrawideband tunability. The rise of graphene in photonics and optoelectronics is shown by several recent results, ranging from solar cells and light-emitting devices to touch screens, photodetectors and ultrafast lasers. Here we review the state-of-the-art in this emerging field.

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Graphene photonics and optoelectronics

Supercapacitors, also called ultracapacitors or electrochemical capacitors, store electrical charge on high-surface-area conducting materials. Their widespread use is limited by their low energy storage density and relatively high effective series resistance. Using chemical activation of exfoliated graphite oxide, we synthesized a porous carbon with a Brunauer-Emmett-Teller surface area of up to 3100 square meters per gram, a high electrical conductivity, and a low oxygen and hydrogen content. This sp 2 -bonded carbon has a continuous three-dimensional network of highly curved, atom-thick walls that form primarily 0.6- to 5-nanometer-width pores. Two-electrode supercapacitor cells constructed with this carbon yielded high values of gravimetric capacitance and energy density with organic and ionic liquid electrolytes. The processes used to make this carbon are readily scalable to industrial levels.

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Carbon-based Supercapacitors Produced by Activation of Graphene

Since the discovery of mechanically exfoliated graphene in 2004, research on ultrathin two-dimensional (2D) nanomaterials has grown exponentially in the fields of condensed matter physics, material science, chemistry, and nanotechnology. Highlighting their compelling physical, chemical, electronic, and optical properties, as well as their various potential applications, in this Review, we summarize the state-of-art progress on the ultrathin 2D nanomaterials with a particular emphasis on their recent advances. First, we introduce the unique advances on ultrathin 2D nanomaterials, followed by the description of their composition and crystal structures. The assortments of their synthetic methods are then summarized, including insights on their advantages and limitations, alongside some recommendations on suitable characterization techniques. We also discuss in detail the utilization of these ultrathin 2D nanomaterials for wide ranges of potential applications among the electronics/optoelectronics, electrocat...

Recent Advances in Ultrathin Two-Dimensional Nanomaterials

The invention relates to a control method for a robot used for on-site explosive mixing and loading operation. The control method comprises the following steps that 1 an instruction for loading explosive is received; 2 a running route is planned through an autonomous navigation system, the explosive-loading robot leaves for a blasting place after the running route is planned, and the step 3 is conducted when the explosive-loading robot arrives at the blasting place; 3 positioning is conducted; 4 measuring is conducted; 5 explosive loading is conducted; 6 whether the explosive is fully loaded or not is judged, if the explosive is fully loaded, the step 7 is conducted, whereas the step 3 is conducted; 7 a pipeline is cleaned; 8 equipment is homed; and 9 explosive loading is finished after the explosive-loading robot returns back to a starting point. The control method for the robot used for the on-site explosive mixing and loading operation has the beneficial effects that the explosive-loading robot is adopted for underground-mine on-site filling of the mixed and loaded explosive, the number of explosive-loading operation staff on an explosive-loading site can be decreased by 10 to 20, the production cost is reduced, and the security of blasting operation is improved.

Control method for robot used for on-site explosive mixing and loading operation

The utility model relates to a novel emulsified bases bin, including the emulsified bases workbin body, landing leg, drive arrangement, support, base, bearing, shaft coupling and spiral, workbin body lower part is convex, and upper portion is equipped with the feed inlet, and the bottom of lower part circular arc is equipped with the discharge gate, and the workbin body is fixed on the chassis through the landing leg, physically be equipped with the base in lower part circular arc center at the workbin, the base passes through bolt and workbin body coupling, and the bearing passes through the bolt and installs on the base, be provided with the relative coaxial arrangement's of levogyration dextrorotation spiral in workbin internal troops under one's command side, the spindle nose part of spiral is through the bearing of workbin body both sides and shaft coupling and drive arrangement's output shaft, and drive arrangement passes through the bolt fastening on the support, and the support passes through the bolt fastening on the chassis. The utility model discloses an advantage embodies: greatly reduced the remaining of the internal matrix of workbin, improved the utilization ratio of the emulsified bases workbin body.

Novel emulsified bases bin

A photo-induced shape memory composite comprises functionalized graphene and thermal-induced shape memory polymer material, wherein the functionalized grapheme is 01-10% of the weight of the thermal-induced shape memory polymer The preparation method of the photo-induced shape memory composite comprises dissolving or dispersing the functionalized grapheme into organic solvent or water, dispersing the thermal-induced shape memory polymer material into another organic solvent, mixing the two solutions, and processing the mixed solution to obtain the composite

Photo-induced shape memory composite and production thereof

The invention relates to a control method of a robot for mixed loading explosive operation on site. The control method comprises the following steps: (1) receiving an explosive loading command; (2) planning a driving path by an autonomous navigation system, after planning of the driving path is finished, causing the explosive loading robot to leave for an detonation site, and entering step (3) after the robot arrives at the detonation site; (3) positioning; (4) measuring; (5) loading explosive; (6) judging whether all explosive loading is finished, and entering step (7) if yes, otherwise entering step (3); (7) cleaning a pipeline; (8) returning devices; and (9) ending the explosive loading after returning back to a starting point. The control method of a robot for mixed loading explosive operation on site has the following beneficial effects: the explosive loading robot is adopted to perform mixed loading explosive filling on site under a shaft, 10-20 operators for explosive loading can be reduced on the explosive loading site, a production cost is reduced and safety of the detonation operation is improved.

Yan Wang

Papers

Control method for robot used for on-site explosive mixing and loading operation

Novel emulsified bases bin

Photo-induced shape memory composite and production thereof

Control method of robot for mixed loading explosive operation on site