The combination of one-dimensional (1D) carbon nanotubes (CNTs) and two-dimensional (2D) graphene materials to generate three-dimensional (3D) carbon nanotube-graphene hybrid thin films (CNGHTFs) has attracted great attention owing to their intriguing properties via the synergistic effects of these two materials on their electrical, optical, and electrochemical properties in comparison with their individual components. This review aims to provide a brief introduction of recent trends in preparation methodologies and some outstanding applications of CNGHTFs. It contains two main scientific subjects. The first of these is the research on preparation techniques of CNGHTFs, including reduction agent-assisted mechanical blending of reduced graphene oxide (rGO) and CNTs, hybridization methods for layer-by-layer (LBL) assembly of CNTs and rGO sheets, multi-step methods using combinations of a solution and chemical vapor deposition (CVD) processing, onestep growth of CNGHTFs by the CVD method, and modified CVD methods via thermal deposition of carbon source on catalyst surfaces. The advantages and disadvantages of the preparation methods of CNGHTFs are presented and discussed in detail. The second scientific subject of the review is the research on some outstanding applications of CNGHTFs in various research fields, including transparent conductors, electron field emitters, field-effect transistors, biosensors and supercapacitors. In most cases, the CNGHTFs showed superior performances than those of the pristine GO/graphene or CNT materials. Therefore, the CNGHTFs exhibit as high-potential materials for various practical applications. Opportunites and challenges in the fields are also presented.
Magnetically separable core/shell Fe3O4/ZnO heteronanostructures (MSCSFZ) were synthesized by a facile approach, and their application for enhanced solar photodegradation of RhB was studied.
To investigate the effects on the slump and compressive strength, this paper produced the sample groups which have the contents of cement paste (composed of cement and water) and Polypropylene fiber were fluctuated within the levels close to the value corresponding to the fundamental composition. Research results show that: The slump of the concrete mixture was directly proportional to the cement paste content but inversely directly proportional to the fiber content. When the used contents of cement paste and fiber were not too high, the compressive strength of the concrete was directly proportional to them. However, when they exceed the limit value, the compressive strength of the concrete will decrease. Synthesizing the impact on the criteria, with B15 concrete, the optimal contents of cement paste and fiber by mass were in the range of 19.1-22.4% and 1-2 kg/m3, respectively.
There are a number of factors affecting on the high temperature and water stability of Stone Matrix Asphalt (SMA). However, under a concrete condition of traffic, climate and construction, together with reliable raw materials, the proportion of various raw materials are the main factors. SMA-16 is taken as an example, by using the Rutting test, Residential stability test and Freezing–thaw cycling test for analysing the impact of the modified asphalt, fiber and mineral filler proportion on SMA. The result shows that these three factors significantly impacted on the high temperature and water stability of SMA with the optimal values of 6.0-6.2%, 0.31% and 10-11%, respectively.
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