Graphene – Exciting Insights into the Synthesis and Chemistry of the Miracle Material of the 21&lt;SUP&gt;st&lt;/SUP&gt; Century and Its Implementation in Chemistry Lessons for the First Time

Schedy, Andreas; Quarthal, Dominik; Oetken, Marco

doi:10.12691/wjce-6-1-8

Cited by 8 publications

(4 citation statements)

References 18 publications

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“…Although permanganate is a strong oxidizing agent, manganese heptoxide (Mn2O7) is a real active reagent that is built up during the reaction of permanganate and sulfuric acid. The temperature needs to be controlled during the synthesis, because manganese heptoxide tends to react explosively when exposed to temperature at 55 ℃ [12].…”

Section: Synthesis Of Graphene Oxidementioning

confidence: 99%

Synthesis of Graphene Oxide-Coated Mesoporous Silica with Cetyltrimethylammonium Bromide (CTAB) Template for Methylene Blue Adsorption

2023

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The synthesis of graphene oxide-coated mesoporous silica (MS_GO) with the template surfactant (Cetyltrimethylammonium Bromide) CTAB has been carried out. The effect of combining mesoporous silica and graphene oxide was studied by knowing the bonds, functional groups and crystalline structures. Functional groups C=O and C=C were formed at wave numbers 1,722, 1,617 and 1,647 cm−1, respectively, as a characteristic of GO compounds. XRD data showed that MS_GO has a more amorphous structure than graphite and GO due to the incorporation of silica onto the graphene oxide surface. The MS_GO synthesis was also applied as an adsorbent for methylene blue dye in water. The adsorption results showed that MS_GO was more effective than pure GO. The percent adorption efficiency (R %) of MS_GO against 10 ppm methylene blue was 93.1 % while that of pure GO was 91.5 %. The addition of mesoporous silica to graphene oxide makes MS_GO adsorbent more effective in adsorption dyes than pure GO, this is supported by the larger total surface area of BET MS_GO was 161.066 m2·g−1, while that of pure GO was 103.818 m2·g−1. HIGHLIGHTS Preparation of graphene oxide from graphite by the modified hummer method Mesoporous silica is synthesized with Graphene Oxide (GO) and occupies between GO layers in the GO interlayer space CTAB is used as a template and forms pores in the synthesis of layered Mesoporous Silica-Graphene Oxide (MS_GO) Graphene Oxide-Coated Mesoporous Silica will be applied for adsorption of methylene blue dye in water. The adsorption efficiency (% R) of GO against methylene blue is lower than % R of MS_GO against methylene blue GRAPHICAL ABSTRACT

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Section: Synthesis Of Graphene Oxidementioning

confidence: 99%

Synthesis of Graphene Oxide-Coated Mesoporous Silica with Cetyltrimethylammonium Bromide (CTAB) Template for Methylene Blue Adsorption

2023

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“…This clearly shows that MoSe 2 /MXene/C has the smallest high-frequency concave semicircle and the smaller interfacial resistance. The proposed design strategy provides a broad prospect for the development of more useful PIBs electrode materials [250] .…”

Section: Mxenesmentioning

confidence: 99%

“…The inset shows the corresponding equivalent circuits for data fitting, where Rct, Zw, RF, CPE and RS represent contact resistance, constant-phase element, electrolyte resistance, charge-transfer resistance and Warburg ion-diffusion resistance, respectively. Reproduced with permission from Ref [250]. (Copyright 2019, American Chemical Society).…”

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confidence: 99%

A review of the energy storage aspects of chemical elements for lithium-ion based batteries

Bashir¹,

Ismail²,

Song³

et al. 2022

Energy Mater

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Energy storage devices such as batteries hold great importance for society, owing to their high energy density, environmental benignity and low cost. However, critical issues related to their performance and safety still need to be resolved. The periodic table of elements is pivotal to chemistry, physics, biology and engineering and represents a remarkable scientific breakthrough that sheds light on the fundamental laws of nature. Here, we provide an overview of the role of the most prominent elements, including s-block, p-block, transition and inner-transition metals, as electrode materials for lithium-ion battery systems regarding their perspective applications and fundamental properties. We also outline hybrid materials, such as MXenes, transition metal oxides, alloys and graphene oxide. Finally, the challenges and prospects of each element and their derivatives and hybrids for future battery systems are discussed, which may provide guidance towards green, low-cost, versatile and sustainable energy storage devices.

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“…All these methods can be grouped in two major classes of top-down and bottom-up approaches. There are a number of methods for synthesis of 2D materials, as listed in Figure 3a, including: Hummer's method [48], micromechanical cleavage [1,49,50], liquid exfoliation [51] assisted by ion intercalation [52][53][54][55] and mechanical force [47,[56][57][58][59], oxidation assisted liquid exfoliation [17,49,60], chemical vapor deposition [61][62][63][64][65], wet chemical synthesis method [66][67][68][69], electrochemical exfoliation [70][71][72][73][74], ball milling [51,75], etching-assisted exfoliation etc. [76][77][78].…”

Section: Synthesis Of Two-dimensional Materialsmentioning

confidence: 99%

Graphene to Advanced MoS2: A Review of Structure, Synthesis, and Optoelectronic Device Application

et al. 2020

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In contrast to zero-dimensional (0D), one-dimensional (1D), and even their bulk equivalents, in two-dimensional (2D) layered materials, charge carriers are confined across thickness and are empowered to move across the planes. The features of 2D structures, such as quantum confinement, high absorption coefficient, high surface-to-volume ratio, and tunable bandgap, make them an encouraging contestant in various fields such as electronics, energy storage, catalysis, etc. In this review, we provide a gentle introduction to the 2D family, then a brief description of transition metal dichalcogenides (TMDCs), mainly focusing on MoS2, followed by the crystal structure and synthesis of MoS2, and finally wet chemistry methods. Later on, applications of MoS2 in dye-sensitized, organic, and perovskite solar cells are discussed. MoS2 has impressive optoelectronic properties; due to the fact of its tunable work function, it can be used as a transport layer, buffer layer, and as an absorber layer in heterojunction solar cells. A power conversion efficiency (PCE) of 8.40% as an absorber and 13.3% as carrier transfer layer have been reported for MoS2-based organic and perovskite solar cells, respectively. Moreover, MoS2 is a potential replacement for the platinum counter electrode in dye-sensitized solar cells with a PCE of 7.50%. This review also highlights the incorporation of MoS2 in silicon-based heterostructures where graphene/MoS2/n-Si-based heterojunction solar cell devices exhibit a PCE of 11.1%.

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Graphene – Exciting Insights into the Synthesis and Chemistry of the Miracle Material of the 21<SUP>st</SUP> Century and Its Implementation in Chemistry Lessons for the First Time

Cited by 8 publications

References 18 publications

Synthesis of Graphene Oxide-Coated Mesoporous Silica with Cetyltrimethylammonium Bromide (CTAB) Template for Methylene Blue Adsorption

Synthesis of Graphene Oxide-Coated Mesoporous Silica with Cetyltrimethylammonium Bromide (CTAB) Template for Methylene Blue Adsorption

A review of the energy storage aspects of chemical elements for lithium-ion based batteries

Graphene to Advanced MoS2: A Review of Structure, Synthesis, and Optoelectronic Device Application

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