Influence from the types of surface functional groups of RGO on the performances of thermal interface materials

Abstract

RGO nanosheets-modified epoxy resin (ER) is a major research interest because of the high thermal performance of the resulting thermal interface materials (TIMs).

Selective adsorption and decomposition of pollutants using RGO-TiO2 with optimized surface functional groups

“…21,22 The major surface functional groups of the GO (h) and GO (x) were carboxyl and hydroxyl, respectively. 17 Two methods were used to reduce the GO samples and achieve the designated reduction degree and type of functional group in the resulting RGO. In the rst method, alcohol was used as the reduction agent to react with the GO (h) and GO (x).…”

Three-dimensional graphene networks and RGO-based counter electrode for DSSCs

“…19,33,34 By adjusting the oxidation and reduction processes, control of the identities and total amounts of surface functional groups can be achieved (as described in relatively high detail in our previous report). 42 Aer optimizing the mass fraction (6%) and reduction degree (C element /C functional ¼ 2.1 : 1, C element : C hydroxyl : C epoxy : C carboxyl ¼ 68 : 22 : 2 : 8) of the employed RGO, a h as high as 9.79% was obtained, comparable with 9.56% value for the device using a Pt electrode and higher than the values previously reported for DSSCs based on graphene CE (the specic photovoltaic performance measures are listed in Table 1 for comparison). [23][24][25][26][27][28]43,44 The detailed C 1s XPS curves of the original graphene oxide (GO) and resulting RGO specimens are shown in Fig.…”

“…45 And the two weaker signals at 287.4 eV and 285.9 eV were ascribed to the C]O and C-OH. 42 According to the integral intensities of these peaks, the relative amount of elemental carbon increased from 42% for the GO to 68% for the optimized RGO (and the relative amounts of the carbon atoms from various chemical states were abstracted). The sample with a high relative quantity of hydroxyl groups displayed a better performance, implying that this functional group improved the interface contact level between the graphene basal plane and electrolyte, and promoted the I 3 À / I À redox reaction.…”

Graphene based photoanode for DSSCs with high performances

“…Recently, the contact levels between the RGO and other materials (including inorganic matters and organic matters) were revealed by our group where the total amount and types of the functional groups on the RGO surface were found to be acting as the determinants. [40][41][42] Aer optimizing these two parameters, the C element : C hydroxyl : C epoxy : C carboxyl ¼ 63 : 16 : 3 : 18 and C element : C function ¼ 1.7 : 1 are recommended for adoption as the modier for the photoanode (the corresponding XPS curves and detailed preparation process are provided in the ESI †), and the resulting J SC and h increase to 26.0 mA cm À2 and 11.8% ($6% higher than the case without the optimization process). Moreover, a synergy between the mass fraction of the RGO in the work layer (as well as in the scattering layer) and the resulting photovoltaic performance is discovered.…”