Nitrogen-Enriched Carbon Nanobubbles and Nanospheres for Applications in Energy Harvesting, Storage, and CO2 Sequestration,ACS Applied Nano Materials

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Nitrogen-Enriched Carbon Nanobubbles and Nanospheres for Applications in Energy Harvesting, Storage, and CO2 Sequestration
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2020-03-24 , DOI: 10.1021/acsanm.0c00402
Devika Laishram ₁ , Kiran P. Shejale _{1,

2} , R. Krishnapriya ₁ , Rakesh K. Sharma ₁

Affiliation

Multifunctional carbon nanomaterials have attracted remarkable consideration for use in various energy conversion and storage devices because of their ultrahigh specific surface area, unique morphology, and excellent electrochemical properties. Herein, we report the synthesis of highly uniform and ordered nitrogen-enriched carbon nanospheres (CS) and nanobubbles (CNB) by a modified Stöber reaction using resorcinol and formaldehyde in the presence of ethylenediamine as a nitrogen source. A comparative study of the prepared CS and CNB nanomaterials is presented here with potential use in a wide variety of applications involving large surface area and electrical conductivity. As counter electrode materials in solar cells, CNB and CS showed enhanced photoelectrochemical activity for catalytically reducing I₃^– to I^– and improved capacitive behavior with a low charge transfer resistance and remarkable power conversion efficiency (PCE) of 10.40% with improved J_sc (20.20 mA/cm²) and V_oc (0.73 V). The enhanced performance of the fabricated photoelectrochemical cell is due to the excellent point contact and good conductivity that offered better charge transportation of electrons with minimum recombination. The enhanced adsorption upon increasing the pressure without an apparent saturation level signified the large CO₂ adsorption with 2 mmol/g for the CS. Additionally, the rectangular-shaped CV curve indicated the double-layer capacitive behavior, good electrochemical reversibility, and high-power characteristics, prerequisites for supercapacitor application. This study probes the practical possibility of nitrogen-enriched carbon nanostructures as a multifunctional material for prospective applications.

中文翻译：

富氮碳纳米气泡和纳米球，用于能量收集，存储和CO ₂隔离

多功能碳纳米材料因其超高的比表面积，独特的形貌和出色的电化学性能，已在各种能量转换和存储设备中引起广泛关注。本文中，我们报告了在乙二胺作为氮源的情况下，使用间苯二酚和甲醛通过改良的Stöber反应合成高度均匀且有序的富氮碳纳米球（CS）和纳米气泡（CNB）。本文介绍了制备的CS和CNB纳米材料的对比研究，在涉及大表面积和电导率的各种应用中具有潜在用途。作为反电极材料在太阳能电池中，CNB和CS表现出增强的光电化学活性催化还原我₃^-到I ^–和改善的电容性能，低的电荷转移电阻和显着的功率转换效率（PCE）为10.40％，J _sc（20.20 mA / cm ²）和V _oc（0.73 V）得到改善。所制造的光电化学电池的性能增强归因于出色的点接触和良好的导电性，从而以最小的重组提供了更好的电子电荷传输。在没有明显饱和度的情况下增加压力后吸附增强，表明CO ₂大CS的吸附量为2 mmol / g。此外，矩形CV曲线表示双层电容行为，良好的电化学可逆性和高功率特性，这是应用超级电容器的先决条件。这项研究探究了富氮碳纳米结构作为多功能材料在未来应用中的实际可能性。

更新日期：2020-03-24

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