Journal Article

Design and Synthesis of NTU-9/Csub.3Nsub.4 Photocatalysts: Effects of NTU-9 Content and Composite Preparation Method

Makowski, Damian, Klimczuk, Tomasz, Baluk, Mateusz A, Bajorowicz, Beata, Lisowski, Wojciech

2023

Overview

Hybrid materials based on graphitic carbon nitride (g-C[sub.3]N[sub.4]) and NTU-9 metal–organic frameworks (MOF) were designed and prepared via solvothermal synthesis and calcination in air. The as-prepared photocatalysts were subsequently characterized using Brunauer–Emmett–Teller (BET) analysis, UV-Vis diffuse reflectance spectroscopy (DRS), photoluminescence (PL) emission spectroscopy, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and scanning electron microscopy (SEM). The obtained NTU-9/C[sub.3]N[sub.4] composites showed a greatly improved photocatalytic performance for the degradation of toluene in the gas phase under LED visible-light irradiation (λ[sub.max] = 415 nm). The physicochemical properties and photocatalytic activities of the obtained NTU-9/C[sub.3]N[sub.4] materials were tuned by varying the NTU-9 content (5–15 wt%) and preparation method of the composite materials. For composites prepared by calcination, the photocatalytic activity increased with decreasing NTU-9 content as a result of the formation of TiO[sub.2] from the MOFs. The best photocatalytic performance (65% of toluene was photodegraded after 60 min) was achieved by the NTU-9/C[sub.3]N[sub.4] sample prepared via the solvothermal method and containing 15 wt% MOF, which can be attributed to the appropriate amount and stable combination of composite components, efficient charge separation, and enhanced visible-light absorption ability. The photocatalytic mechanisms of the prepared hybrid materials depending on the preparation method are also discussed.

• Publisher: MDPI AG
• Subject: Economic development / Poland