Manipulating the Structure and Characterization of Sr1−xLaxTiO3 Nanocubes toward the Photodegradation of 2-Naphthol under Artificial Solar Light

Abstract

Effective La-doped SrTiO3 (Sr1−xLaxTiO3, x = 0–0.1 mol.% La-doped) nanocubes were successfully synthesized by a hydrothermal method. The influence of different La dopant concentrations on the physicochemical properties of the host structure of SrTiO3 was fully characterized. X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD) revealed that the Sr2+ in the crystal lattice of SrTiO3 was substituted by La3+. As a result, the absorption region of the Sr1−xLaxTiO3 could be extended to visible light. Scanning electron microscopy (SEM) images confirmed that their morphologies are associated with an increased surface area and an increased La-doping concentration. The decrease in the photoluminescence (PL) intensity of the dopant samples showed more defect levels created by the dopant La+3 cations in the SrTiO3 structure. The photocatalytic activities of Sr1−xLaxTiO3 were evaluated with regard to the degradation of 2-naphthol at typical conditions under artificial solar light. Among the candidates, Sr0.95La0.05TiO3 exhibited the highest photocatalytic performance for the degradation of 2-naphthol, which reached 92% degradation efficiency, corresponding to a 0.0196 min−1 degradation rate constant, within 180 minutes of irradiation. Manipulating the structure of Sr1−xLaxTiO3 nanocubes could produce a more effective and stable degradation efficiency than their parent compound, SrTiO3. The parameters remarkably influence the Sr1−xLaxTiO3 nanocubes’ structure, and their degradation efficiencies were also studied. Undoubtedly, substantial breakthroughs of Sr1−xLaxTiO3 nanocube photocatalysts toward the treatment of organic contaminants from industrial wastewater are expected shortly.

Influence of Novel SrTiO3/MnO2 Hybrid Nanoparticles on Poly(methyl methacrylate) Thermal and Mechanical Behavior

“…The strongest peaks observed in the STO/MnO 2 are detected at angular positions of 32.4, 40.0, 46.3, 57.8, 67.8, and 77.0°. These peaks are attributed to the crystallographic planes of STO possessing cubic symmetry, specifically corresponding to (110), (111), (200), (211), (220), and (311) orientations [ 35 , 52 ]. Diffraction originating from MnO 2 also shows four peaks at 28.8, 37.2°, 56.7° and 72.4°attributed to the (110), (101), (211) and (112) planes of β -MnO 2 polycrystalline nanoparticles consisting of pure single tetragonal phase system [ 53 , 54 ].…”

Photoelectrochemical biosensing platform for the SARS‐CoV‐2 spike and nucleocapsid proteins

“…Figure 1 shows the XRD patterns for SrTiO 3 , BiVO 4 and the complete composite BiVO 4 /SrTiO 3 . For SrTiO 3 (Figure 1a), peaks are observed at 22.8°, 32.4°, 40.0°, 46.5°, 57.8°, 67.8°and 77.2°corresponding to the (1 0 0), (1 1 0), (1 1 1), (2 0 0), (2 1 1), (2 2 0), and (3 1 0) planes, which are characteristic of the SrTiO 3 cubic phase (JCPDS 00-35-0734) [39][40][41]. The XRD pattern for BiVO 4 (Figure 1b) contain peaks corresponding to the crystal planes (0 1 1), (1 1 2), (0 0 4), (0 2 0), (2 1 1), (0 1 5), (0 2 4), (À 2 2 0), (1 1 6) and (2 2 4), related to the monoclinic structure of BiVO 4 (JCPDS 01-083-1698) [22,38].…”

Synthesis and photocatalytic activity of BiOI particles: An efficient visible-light-driven degradation of organic pollutants in aqueous environments

“…The release of dyes into aquatic ecosystems leads to reduced water quality, disrupted food chains, and toxicity, posing significant threats to the health and balance of the ecosystem [2]. Dye 1340 (2024) 012009 IOP Publishing doi:10.1088/1755-1315/1340/1/012009 2 pollution, in addition, can have detrimental effects on human health, causing skin irritation, respiratory issues, hormonal disruption, and being associated with long-term health risks such as carcinogenicity and reproductive disorders [3]. In recent years, various alternative approaches have been employed to tackle this specific issue, including ozonation [4], electrochemical treatment [5], membrane filtration [6], adsorption method [7], coagulation [8], bioadsorption [9], photocatalysis [10,11], and ion exchange removal [12].…”