In situ measurement of the specific surface area of reduced graphene oxide using time-resolved laser induced incandescence

IF 1.8 3区物理与天体物理 Q3 OPTICS

Applied Physics B Pub Date : 2026-04-11 DOI:10.1007/s00340-026-08633-0

Horace I. Looi, Sarah Jankhani, Michael Pope, Kyle J. Daun

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Abstract

Reduced graphene oxide (rGO) produced by the rapid thermal expansion of graphite oxide is a promising alternative to graphene for applications requiring large volumes and some chemical functionality on the graphene, since this approach offers potentially high yields and throughput. However, the surface area and single layer dispersibility of the resulting rGO powder depends heavily on precursor moisture content, chemistry and morphology, as well as and process parameters that include residence time and quenching rates. While large-scale commercial deployments have been demonstrated, there are currently no real-time diagnostics capable of assessing inline material quality. In this study, we propose time-resolved laser-induced incandescence (TiRe-LII) as a means to derive the real-time relative specific surface area (S_sp) of rGO particles which is expected to be a strong indicator of single sheet dispersibility. The TiRe-LII derived S_sp were found to be consistent in both magnitude and trend to those found through batch gas adsorption measurements analyzed by fitting the Brunauer-Emmett-Teller (BET) isotherm.

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利用时间分辨激光诱导白炽灯原位测量还原氧化石墨烯的比表面积

通过氧化石墨的快速热膨胀产生的还原氧化石墨烯（rGO）是石墨烯的一个很有前途的替代品，用于需要大体积和石墨烯上的一些化学功能的应用，因为这种方法具有潜在的高产量和吞吐量。然而，所得到的氧化石墨烯粉末的表面积和单层分散性在很大程度上取决于前驱体的含水量、化学和形态，以及包括停留时间和淬火速率在内的工艺参数。虽然大规模的商业应用已经得到证实，但目前还没有能够评估在线材料质量的实时诊断。在这项研究中，我们提出了时间分辨激光诱导白炽灯（TiRe-LII）作为一种手段来获得氧化石墨烯颗粒的实时相对比表面积（Ssp），这有望成为单片分散性的有力指标。通过拟合brunauer - emmet - teller （BET）等温线，发现TiRe-LII得到的Ssp在大小和趋势上与通过间歇气体吸附测量得到的结果一致。

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来源期刊

Applied Physics B 物理-光学

CiteScore

4.00

自引率

4.80%

发文量

202

审稿时长

3.0 months

期刊介绍： Features publication of experimental and theoretical investigations in applied physics Offers invited reviews in addition to regular papers Coverage includes laser physics, linear and nonlinear optics, ultrafast phenomena, photonic devices, optical and laser materials, quantum optics, laser spectroscopy of atoms, molecules and clusters, and more 94% of authors who answered a survey reported that they would definitely publish or probably publish in the journal again Publishing essential research results in two of the most important areas of applied physics, both Applied Physics sections figure among the top most cited journals in this field. In addition to regular papers Applied Physics B: Lasers and Optics features invited reviews. Fields of topical interest are covered by feature issues. The journal also includes a rapid communication section for the speedy publication of important and particularly interesting results.