Facile Construction of All-Solid-State Z-Scheme g-C3N4/TiO2 Thin Film for the Efficient Visible-Light Degradation of Organic Pollutant

Abstract

The increasing discharge of dyes and antibiotic pollutants in water has brought serious environmental problems. However, it is difficult to remove such pollutants effectively by traditional sewage treatment technologies. Semiconductor photocatalysis is a new environment-friendly technique and is widely used in aqueous pollution control. TiO2 is one of the most investigated photocatalysts; however, it still faces the main drawbacks of a poor visible-light response and a low charge-separation efficiency. Moreover, powder photocatalyst is difficult to be recovered, which is another obstacle limiting the practical application. In this article, g-C3N4/TiO2 heterojunction is simply immobilized on a glass substrate to form an all-solid-state Z-scheme heterojunction. The obtained thin-film photocatalyst was characterized and applied in the visible-light photodegradation of colored rhodamine B and tetracycline hydrochloride. The photocatalytic performance is related to the deposited layers, and the sample with five layers shows the best photocatalytic efficiency. The thin-film photocatalyst is easy to be recovered with stability. The active component responsible for the photodegradation is identified and a Z-scheme mechanism is proposed.

Synthesis of Novel 1T/2H-MoS2 from MoO3 Nanowires with Enhanced Photocatalytic Performance

“…In recent decades, numerous photocatalysts such as TiO 2 [ 9 , 10 , 11 ], ZnO [ 12 ], g-C 3 N 4 [ 13 , 14 ], CdS [ 15 ], and WS 2 [ 16 ] have been developed for the photocatalytic application. Among these photocatalysts, two-dimensional (2D) layered materials have attracted specific concern from academics and industry due to their prominent features, such as large specific surface area, strong electrical and thermal conductivity [ 17 ], high carrier mobility, and good transmittance [ 18 , 19 ].…”

Fabrication of a Novel AgBr/Ag2MoO4@InVO4 Composite with Excellent Visible Light Photocatalytic Property for Antibacterial Use

“…For composite materials, the degradation efficiency of AgBr/Ag 2 MoO 4 @InVO 4 for CIP was above 95.5%, and the degradation efficiency of 1.0 AgBr/Ag 2 MoO 4 @InVO 4 for CIP was the highest. In Figure 4 , a linear relationship between -ln(C/C 0 ) and reaction time (T) is displayed, which indicates that the reaction process conformed to the pseudo-first-order reaction kinetic process [ 31 ]. −ln (C/C 0 ) = K app T …”

Photocatalytic Degradation and Antibacterial Properties of Fe3+-Doped Alkalized Carbon Nitride

“…In the present study, kinetic analysis was performed to reveal the photodegradation of RhB under the function of g-C 3 N 4 -based catalysts. All photocatalytic degradation reactions followed the pseudo-first-order kinetics (Equation 7) [60].…”