Preparation of heterostructured WO3/TiO2 catalysts from wood fibers and its versatile photodegradation abilities

Abstract

A facile route was adopted to synthesize heterostructured WO3/TiO2 photocatalysts from wood fibers through a two-steps hydrothermal method and a calcination process. The prepared WO3/TiO2-wood fibers were used as photocatalysts under UV irradiation for photodegradation of rhodamine B, methylene blue and methyl orange. In calcination process, the wood fibers acted as carbon substrates to prepare the WO3/TiO2 photocatalysts with high surface area and unique morphology. Thus, the significant enhanced photodegradation efficiency of the organic pollutants with the WO3/TiO2-wood fibers under UV irradiation was obtained. The photodegradation rates are measured which confirms the highest performance of the WO3/TiO2-wood fibers after calcination in comparison to the TiO2-wood fibers after calcination and the pure WO3/TiO2 after calcination. Moreover, the photodegradation efficiency of the WO3/TiO2-wood fibers after calcination under visible light is high. Our results demonstrated that the WO3/TiO2-wood fibers after calcination are a promising candidate for wastewater treatment in practical application.

Bioinspired C/TiO$lt;inf$gt;2$lt;/inf$gt; photocatalyst for rhodamine B degradation under visible light irradiation

“…Figure 5 shows the N 2 adsorption-desorption isotherms of the pure TiO 2 and the PP-C-TiO 2 . It could be seen the curve for the PP-C-TiO 2 exhibits a hysteresis loop, which is attributed to type IV isotherms and the representative of mesoporous materials, indicating the presence of mesopores (2-50 nm) [17,18] , while the curve for the pure TiO 2 shows a type III isotherm, which indicates that the absorption property of the material is weak.…”

2D black phosphorus and tungsten trioxide heterojunction for enhancing photocatalytic performance in visible light

“…1,2 Many investigations have been conducted to overcome these disadvantages and improve the photocatalytic performance, mainly including ion doping and the formation of heterojunction structures between two semiconductor materials. 5,8 Previous studies demonstrated that photocatalytic performance of semiconductor materials was signicantly enhanced due to the doping of non-metal elements N, 9 S, 5 and P, 10 or metal elements Cu, 11 Ag, 12 and Ce. 13 Liang et al proposed that Ag/TiO 2 and Ce/TiO 2 have high photocatalytic degradation performance for formaldehyde gas under UVlight.…”

“…13 The photocatalytic performance of catalyst can also be effectively improved by preparing a heterojunction structure between two semiconductor materials. 8 The formation of a heterojunction structure between two different semiconductors could broaden the spectral response range and reduce the recombination of photogenerated carriers. 14 Gao et al found that the photodegradation efficiency promoted for the WO 3 /TiO 2 heterojunction photocatalyst compared to WO 3 and TiO 2 under visible-light.…”

Valorización de residuos nanoestructuraods (nanoresiduos) provenientes del proceso HFCVD-CSVT: Uso como materiales adsorbentes, fotocatalíticos y para la oxidación catalítica del hollín

“…Los óxidos metálicos como ZnO, TiO 2 , Cu 2 O, MnO 2 , Fe 2 O 3 , WO 3 y CeO 2 son compuestos formados por oxígeno y un metal [1,2]. Dichos materiales pueden ser nanoestructurados y semiconductores, como el óxido de tungsteno (WO 3 ) [3][4][5][6].…”