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首页> 外文期刊>RSC Advances >A graphene titanium dioxide nanocomposite (GTNC): one pot green synthesis and its application in a solid rocket propellant
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A graphene titanium dioxide nanocomposite (GTNC): one pot green synthesis and its application in a solid rocket propellant

机译：石墨烯二氧化钛纳米复合材料（GTNC）：一种盆栽绿色合成及其在固体火箭推进剂中的应用

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摘要

A green process was developed for a graphene-titanium dioxide nanocomposite (GTNC) synthesis by dispersing titanium dioxide (TiO2) nanoparticles and graphene nano-sheets (GNSs) in ethanol via ultrasonication followed by microwave irradiation. The synthesized GTNC was well characterized by various tools: viz. XRD, HRTEM, FTIR and Raman spectroscopy. Also, Simultaneous Thermal Analysis (STA) and Differential Scanning Calorimetry (DSC) techniques have been employed to study the enhancement of the catalytic activity of the GTNC for the decomposition of Ammonium perchlroate (AP). The GTNC with 5 wt% in AP was found to be a highly effective catalyst for the AP decomposition. The decomposition temperature decreases from 412.87 degrees C to 372.50 degrees C and Delta H increases from 2053 to 3903 J g(-1). Furthermore, the GTNC was identified as an effective burn rate enhancer (i.e. combustion catalyst) for an AP based composite propellant for solid rocket propellants as confirmed by STA, DSC, activation energy calculations and burn rate measurements. The results show that the burn rate of the propellant increases by 24% for the TiO2 nanoparticle based composition compared to the base composition, whereas a significant increase of 50% is achieved in the presence of the GTNC. Hence, the performance is improved significantly for the solid rocket propellant.
机译：通过超声波分散在乙醇中分散二氧化钛（TiO 2）纳米颗粒和石墨烯纳米片（GNSS），为微波辐射分散在乙醇中的石墨烯 - 二氧化钛纳米复合材料（GTNC）合成而开发了绿色过程。合成的GTNC通过各种工具提供了很好的特征：VIZ。 XRD，HRTEM，FTIR和拉曼光谱。此外，已经采用同时热分析（STA）和差示扫描量热法（DSC）技术来研究GTNC催化活性的增强，用于百邻氨酸铵（AP）的分解。发现具有5wt％的AP中的GTNC是AP分解的高效催化剂。分解温度从412.87摄氏度降低至372.50℃，ΔH从2053增加到3903Jg（-1）。此外，对于由STA，DSC，激活能量计算和燃烧速率测量证实的固体火箭推进剂，将GTNC鉴定为用于基于AP的复合推进剂的有效烧伤率增强剂（即燃烧催化剂）。结果表明，与基础组合物相比，TiO2纳米粒子组合物的推进剂的烧伤率增加了24％，而在GTNC存在下，实现了50％的显着增加。因此，对于固体火箭推进剂，性能显着改善。

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