研究目的
Synthesizing three different doped?titanium oxide nanoparticles (MxTiyOz; M = Ni, Co, and Mn) through decomposition of bimetallic titanium complex compound of salicylic acid (L1) and 1,2 dihydroxybenzene (L2) as phenol ligands with Ni, Co and Mn ions based titanium.
研究成果
The study successfully synthesized MxTiyOz nanoparticles with reduced energy band gaps (down to 1.8 eV), increased BET surface activity, and mesoporosity, enhancing photocatalytic degradation of bromophenol blue under visible and UV light, with higher efficiency under visible light. The method offers a novel approach for doped titanium catalysts with improved properties.
研究不足
High hygroscopicity of complexes affects mass loss in thermal analysis. Limited to specific ligands and metals; potential for optimization in decomposition temperature and economic factors.
1：Experimental Design and Method Selection:
Synthesis of bimetallic complexes via reaction of titanium butoxide with metal salts and phenolic ligands in THF, followed by thermal decomposition to nanoparticles. Characterization using UV-Vis, FT-IR, CHN analysis, quantum-chemical modelling, thermal analysis, XRD, FESEM, EDX, and BET surface analysis. Photocatalytic degradation experiments under UV and visible light.
2：Sample Selection and Data Sources:
Complexes synthesized from salicylic acid and 1,2 dihydroxybenzene ligands with Ni, Co, Mn salts. Nanoparticles obtained by thermal decomposition.
3：List of Experimental Equipment and Materials:
Titanium(IV) butoxide, tetrahydrofuran, 1,2 dihydroxybenzene, salicylic acid, Co(NO3)2·6H2O, Mn(NO3)2·4H2O, Ni(NO3)2·6H2O, dry argon, hexane, bromophenol blue, mercury lamp, filter paper, various spectrometers and analyzers.
4：Experimental Procedures and Operational Workflow:
Preparation of solutions, mixing, crystallization, thermal decomposition at 25-700°C. Photocatalytic tests with bpb under UV and visible light, sampling every 30 min for 120 min.
5：Data Analysis Methods:
UV-Vis spectroscopy for concentration measurement, Tauc plot for band gap calculation, Scherer equation for crystallite size, BET and BJH methods for surface analysis, pseudo-first-order kinetics for degradation rates.
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FT-IR spectrophotometer
FT 801
Recording FT-IR spectra from 400 to 4000 cm?1 at room temperature.
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Elemental analyser
Varian 735-OES
Varian
Carrying out chemical analysis.
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UV-Vis spectrophotometer
Cary-50 scan
Varian
Investigating UV-Vis spectroscopy in the range of 200-800 nm.
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X-ray diffraction tool
DORN-7
Studying X-ray diffraction of nanoparticles with Cu Kα radiation.
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Field Emission Scanning Electron Microscopy
TESCAN MIRA (II)
TESCAN
Carrying out microscopic images.
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Energy-dispersive x-ray analyzer
Studying the amount of elements.
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UV-Vis diffuse reflectance spectrometer
Varian
Studying UV-Vis spectroscopy.
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Thermo-analyser
SDT Q600
Performing differential-thermal analysis in air from 25-700°C.
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Surface area analyzer
ASAP 2000
Micromeritics
Measuring surface properties using nitrogen adsorption at 77 K.
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Mercury lamp
UV light source set at 370 W for photocatalytic experiments.
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Filter paper
0.4 nm
Separating catalyst from solution.
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