The utilization of waste cooking palm oil as a green carbon source for the growth of multilayer graphene

Malek, M. F.; Robaiah, M.; Suriani, A. B.; Mamat, M. H.; Ahmad, Mohd Khairul; Soga, Tetsuo; Rusop, M.; Abdullah, Saifollah; Khusaimi, Z.; Aslam, Muhammad; Asli, N. A.

doi:10.1007/s41779-020-00539-0

Cited by 4 publications

(2 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Meanwhile, rGO has been reported to improve the humidity detection of other metal oxide-based humidity sensors. In addition, carbon nanostructures can be prepared using abundant organic precursor materials, including waste materials [ 21 , 22 ]. TiO 2 nanostructures with a high surface area exhibit excellent humidity-sensing ability.…”

Section: Introductionmentioning

confidence: 99%

Formation of a Nanorod-Assembled TiO2 Actinomorphic-Flower-like Microsphere Film via Ta Doping Using a Facile Solution Immersion Method for Humidity Sensing

et al. 2023

View full text Add to dashboard Cite

This study fabricated tantalum (Ta)-doped titanium dioxide with a unique nanorod-assembled actinomorphic-flower-like microsphere structured film . The Ta-doped TiO2 actinomorphic-flower-like microsphere (TAFM) was fabricated via the solution immersion method in a Schott bottle with a home-made improvised clamp. The samples were characterised using FESEM, HRTEM, XRD, Raman, XPS, and Hall effect measurements for their structural and electrical properties. Compared to the undoped sample, the rutile-phased TAFM sample had finer nanorods with an average 42 nm diameter assembled to form microsphere-like structures. It also had higher oxygen vacancy sites, electron concentration, and mobility. In addition, a reversed double-beam photoacoustic spectroscopy measurement was performed for TAFM, revealing that the sample had a high electron trap density of up to 2.5 μmolg−1. The TAFM showed promising results when employed as the resistive-type sensing film for a humidity sensor, with the highest sensor response of 53,909% obtained at 3 at.% Ta doping. Adding rGO to 3 at.% TAFM further improved the sensor response to 232,152%.

show abstract

Section: Introductionmentioning

confidence: 99%

Formation of a Nanorod-Assembled TiO2 Actinomorphic-Flower-like Microsphere Film via Ta Doping Using a Facile Solution Immersion Method for Humidity Sensing

et al. 2023

View full text Add to dashboard Cite

show abstract

“…Considerable attempts have been made to derive graphene from a wide range of natural resources, for example, food materials, botanical hydrocarbons, and biomass. [ 15 ] These include table sugar, honey, butter, [ 16 ] cookies, chocolate, [ 17 ] camphor, [ 18 ] tea tree essential oil, [ 19 ] Citrus sinensis oil, [ 20 ] soybean oil, [ 21 ] waste cooking palm oil, [ 22 ] nutshells, [ 21 ] Colocasia esculenta , and Nelumbo nucifera leaves. [ 23 ] However, the usage of these feedstocks is limited to certain methods, such as modified Hummers’ method, pyrolysis, and CVD or PE‐CVD techniques.…”

Section: Introductionmentioning

confidence: 99%

Plasma‐Based Synthesis of Freestanding Graphene from a Natural Resource for Sensing Application

Zafar

Liu

Hernández

et al. 2023

Adv Materials Inter

View full text Add to dashboard Cite

The bottomup approach, that is, modified Hummers' method, is a well-established chemical synthesis technique to synthesize graphene. However, this technique, not only utilizes strong acids and oxidants [4,5] but also entails numerous steps of synthesis such as dilution, mixing, oxidation, reduction, washing, centrifuging, and intense stirring. [6] On the other hand, some of the bottom-up methods, in particular, chemical vapor deposition (CVD) and plasma-enhanced chemical vapor deposition (PE-CVD) are expensive and laborious methodologies comprising pre-synthesis and post-synthesis requirements, that is, high vacuum, pre-heating, and subsequent transfer of graphene to other substrates. [7][8][9] Recently, a new bottom-up approach, so-called atmospheric pressure microwave plasma (APMP) is gaining popularity as it synthesizes graphene without the hassles of pre-heating, high vacuuming, and the need for a substrate. Most importantly, the graphene obtained through this method happens to be freestanding and scalable. [10,11] The precursors used for producing graphene have a significant role in determining the sustainability of the synthesis process. Often graphene is produced from commercially available graphite, [12] graphene oxide (GO), [13] methane, or other unreplenishable hydrocarbons. [14] These resources Atmospheric pressure microwave plasma has the lead in synthesizing freestanding and scalable graphene within seconds without the need for high vacuum and temperature. However, the process is limited in utilizing chemical sources for synthesis, such as methane and ethanol. Herein, the usage of an extract of a sustainable precursor, that is, Melaleuca alternifolia, commonly known as tea tree, is for the first time reported to synthesize graphene nanosheets in atmospheric pressure microwave plasma. The synthesis is carried out in a single step at a remarkably low microwave power of 200 W. The morphology, structure, and electrochemical properties of graphene are studied using state-of-the-art characterization techniques such as Raman spectroscopy, X-ray diffraction, transmission electron microscopy (TEM) and electrochemical impedance spectroscopy. The TEM images reveal the presence of a combination of nanostructures such as nano-horns, nano-rods, or nano-onions consisting of multi-layer graphitic architectures. An excellent sensing capability of as-synthesized graphene is demonstrated through the detection of diuron herbicide. A commendable linear range of 20 µm to 1 mm and a limit of detection of 5 µm of diuron is recorded.

show abstract

Challenges and opportunities for the graphene industry. Sustainable approaches for the circular economy

Vinci

Gobbi

Ruggieri

et al. 2023

Graphene Extraction From Waste

View full text Add to dashboard Cite

The utilization of waste cooking palm oil as a green carbon source for the growth of multilayer graphene

Cited by 4 publications

References 51 publications

Formation of a Nanorod-Assembled TiO2 Actinomorphic-Flower-like Microsphere Film via Ta Doping Using a Facile Solution Immersion Method for Humidity Sensing

Formation of a Nanorod-Assembled TiO2 Actinomorphic-Flower-like Microsphere Film via Ta Doping Using a Facile Solution Immersion Method for Humidity Sensing

Plasma‐Based Synthesis of Freestanding Graphene from a Natural Resource for Sensing Application

Challenges and opportunities for the graphene industry. Sustainable approaches for the circular economy

Contact Info

Product

Resources

About