Adsorption of Aniline Using Novel Mesoporous Carbon Nitride

Abstract

Aniline is a toxic organic pollutant that is abundantly present in the environment. One of approaches to remove the aniline is by adsorption process. In this study, mesoporous carbon nitride (MCN) was proposed for the first time to be a potential adsorbent for aniline. The adsorption studies were carried out at room temperature on the aniline solution with various initial concentrations for both bulk carbon nitride (BCN) and MCN. Owing to its larger surface area, the MCN showed much higher adsorption capacity towards aniline compared to the BCN. This result indicated that adsorbent with large surface area is very crucial in the adsorption of aniline. Comparison study was also carried out using mesoporous silica, MCM-41, which was reported to act as a good adsorbent for aniline. The adsorption capability of MCN was found to be higher than that of MCM-41. It was suggested that the MCN with larger pore diameter might have more suitable and favourable adsorption sites for aniline compared to MCM-41. This study obviously showed that MCN would be a new potential adsorbent for removal of aniline.

Mesoporous carbon nitride as a metal-free catalyst for the removal of aniline

“…Fig. 6,13,18 Both materials have a graphite-like structure with an intense type of interlayer stacking peak (002) at 2q of 27.30 , corresponding to an interlayer distance of 0.33 nm, while the weak peak immersed at 2q of 13.10 was denoted as in-planar repeating units in distance of 0.68 nm. As shown in the Fig.…”

“…As shown in the Fig. 6,7,9,18,19,21 The BET specic surface areas of the materials and mesoscale textural properties of the MCN and the MCM-41 were obtained by nitrogen adsorption-desorption measurements. 6,13,18 Both materials have a graphite-like structure with an intense type of interlayer stacking peak (002) at 2q of 27.30 , corresponding to an interlayer distance of 0.33 nm, while the weak peak immersed at 2q of 13.10 was denoted as in-planar repeating units in distance of 0.68 nm.…”

“…It can be observed that the BCN exhibited higher intensity than the MCN. 6,13,16,18 It was observed that the MCN has larger capillary condensation than the MCM-41 due to the presence of combination of type H1 and H3 hysteresis loop with slit-shape pores present in the structure. The reduced graphitic order of the MCN might be due to introduction of porosity into the structure and formation of defects during the synthesis process.…”

“…6,13,15,16,18 Pale yellow powder of BCN was obtained when the cyanamide precursor was calcined at a rate of 2.2 K min À1 to reach the temperature of 823 K and it was held for 4 h. The MCN was synthesized by addition of an appropriate amount of cyanamide to the colloidal silica solution where mass ratio was xed to 1. 6,13,15,16,18 Pale yellow powder of BCN was obtained when the cyanamide precursor was calcined at a rate of 2.2 K min À1 to reach the temperature of 823 K and it was held for 4 h. The MCN was synthesized by addition of an appropriate amount of cyanamide to the colloidal silica solution where mass ratio was xed to 1.…”

“…The MCN was reported able to adsorb toxic aniline 6 and N-nitrosopyrrolidine (NPYR). The MCN was reported able to adsorb toxic aniline 6 and N-nitrosopyrrolidine (NPYR).…”