Abstract
The design and optimal synthesis of functional nanomaterials can meet the requirements of energy and environmental science. As a typical photocatalyst, TiO2 can be used to degrade dyes into non-toxic substances. In this work, we demonstrated the in-situ hydrothermal synthesis of carbon quantum dots (CQDs)-modified TiO2 (CQDs/TiO2) particles, and the subsequent fabrication of three-dimensional (3D) graphene oxide (GO) foam doped with CQDs/TiO2 via a facile strategy. By making full use of the up-conversion characteristics of CQDs, the synthesized CQDs/TiO2 exhibited high catalytic activity under visible light. In order to recover the photocatalyst conveniently, CQDs/TiO2 and GO were mixed by ultrasound and loaded on 3D polyurethane foam (PUF) by the multiple impregnation method. It was found that GO, CQDs/TiO2, and PUF reveal synergistic effects on the dye adsorption and photocatalytic degradation processes. The fabricated 3D CQDs/TiO2/GO foam system with a stable structure can maintain a high photocatalytic degradation efficiency after using at least five times. It is expected that the fabricated 3D materials will have potential applications in the fields of oil water separation, the removal of oils, and the photothermal desalination of seawater.
Highlights
Due to increasing environmental problems currently, a lot of studies have been performed to develop new materials to control environmental pollution, especially the high performance purification of polluted water and air [1,2,3,4,5]
We propose novel we propose novel 3D polyurethane foam (PUF)-supported graphene oxide (GO) foams that doped with carbon quantum dots (CQDs)-modified TiO2 particles
Particles for adsorption for graphene oxide (GO) foam that doped with carbon quantum dots (CQDs)/TiO2 particlesand photocatalytic degradation of dyes
Summary
Due to increasing environmental problems currently, a lot of studies have been performed to develop new materials to control environmental pollution, especially the high performance purification of polluted water and air [1,2,3,4,5]. Ji et al have immersed melamine melamine foams in the reduced GO solution to prepare super hydrophobic composites for oil foams in the[27] In another case, Nguyen andsuper co-workers have applied the dipping method to [27]. Foam that doped with carbon quantum dots (CQDs)/TiO particles for adsorption for graphene oxide (GO) foam that doped with carbon quantum dots (CQDs)/TiO2 particlesand photocatalytic degradation of dyes. The fabricated 3D CQDs/TiO2/GO exhibited a high performance for the adsorption and photocatalytic degradation of dyes, proving high of the PUF-based 3D materials in this work. The fabricated 3D CQDs/TiO2 /GO exhibited a high performance for the adsorption and photocatalytic degradation of dyes, proving high potentials in photocatalytic water decomposition, photothermal heating desalination and the development of inorganic photoelectric materials
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