光催化
碳纤维
亚甲蓝
孔雀绿
光降解
降级(电信)
光化学
材料科学
核化学
催化作用
化学工程
化学
有机化学
复合数
复合材料
吸附
工程类
电信
计算机科学
作者
Umairah Abd Rani,Law Yong Ng,Ching Yin Ng,Ebrahim Mahmoudi,Yee‐Sern Ng,Abdul Wahab Mohammad
标识
DOI:10.1016/j.jwpe.2020.101816
摘要
Abstract Empty fruit bunches (EFB) are the most abundant source of agricultural wastes in Malaysia but with limited applications. Due to their high content of carbon, oxygen and hydrogen, EFB can potentially be used to produce carbon-based nanoparticles. This study introduces a sustainable route to fabricate nitrogen-doped carbon quantum dots (NCQDs) through hydrothermal treatment using lignin that was extracted from EFB as a raw material. The NCQDs showed blue fluorescence under a UV lamp owing to their excellent optical properties. The optical properties of NCQDs remained unchanged after several hours of UV-light exposure and over eight months of storage, indicating an outstanding reactivity and stability. The average particle size of NCQDs was found to be 3.6 nm. The NCQDs degraded 97 % of methylene blue and 98 % of malachite green within 180 min and 120 min of sunlight irradiation, respectively. The photocatalytic degradation rate of these dyes followed first-order kinetics based on the Langmuir-Hinshelwood model. This research demonstrates an attractive way of producing a highly efficient photocatalyst towards the photocatalytic degradation of organic dyes in water treatment.
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