研究目的
To develop a highly efficient TiO2 photocatalyst by heterostructuring a 3D nanostructured TiO2 monolith with graphene quantum dots (GQDs) through an APTES linker to enhance visible light absorption and charge separation for environmental remediation applications.
研究成果
The 3D TiO2/APTES/GQD heterostructure demonstrated significantly enhanced photocatalytic performance under both UV and visible light, attributed to improved visible light absorption and charge separation. The design shows great promise for efficient photocatalytic applications in environmental purification and sterilization.
研究不足
The study focuses on the enhancement of photocatalytic performance under controlled laboratory conditions. The scalability and long-term stability of the heterostructure under real environmental conditions were not extensively explored.
1：Experimental Design and Method Selection:
The study involved the fabrication of a monolithic 3D TiO2/APTES/GQD heterostructure using proximity-field nanopatterning (PnP) and atomic layer deposition (ALD) methods. The APTES linker was used to facilitate the chemical bonding between GQDs and TiO
2：Sample Selection and Data Sources:
The samples included pristine 3D TiO2, directly GQD attached 3D TiO2/GQD, and GQD attached 3D TiO2 with APTES linker.
3：List of Experimental Equipment and Materials:
Equipment included SEM, TEM, XRD, XPS, FT-IR, Raman spectroscopy, UV–vis absorption spectroscopy, and transient absorption spectroscopy. Materials included TiO2, GQDs, APTES, and MB for photocatalytic tests.
4：Experimental Procedures and Operational Workflow:
The 3D TiO2 was fabricated, hydroxylated, functionalized with APTES, and then chemically bonded with GQDs. Photocatalytic dye degradation tests were conducted under UV and visible light.
5：Data Analysis Methods:
The data were analyzed using various spectroscopic techniques to confirm the chemical bonding, absorption enhancement, and charge carrier dynamics.
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