研究目的
To prepare a nanostructured TiO2 coating on a large-scale titanium plate by a simple one-step surface mechanical alloying (SMA) treatment for photocatalytic degradation of organic dyes.
研究成果
A black nanostructured TiO2 coating was successfully fabricated on a titanium sheet by one-step SMA treatment, showing high photocatalytic activity comparable to raw TiO2 powder. This method is suitable for producing high-performance photocatalytic plates for environmental applications.
研究不足
The study does not address the long-term stability and recyclability of the nanostructured TiO2 coating under repeated photocatalytic cycles.
1：Experimental Design and Method Selection
A nanostructured TiO2 coating was prepared on a titanium plate using surface mechanical alloying (SMA) treatment. The coating's photocatalytic activity was evaluated by the decolorisation of aqueous rhodamine-B under UV–vis light irradiation.
2：Sample Selection and Data Sources
Commercial titanium sheets were used as substrates. TiO2 powder and rhodamine-B (RB) were of analytical grade.
3：List of Experimental Equipment and Materials
SPEX mill (SPEX/8000M, 230V/50 Hz), SEM (Zeiss Ultra 55), EDS (Oxford X-MaxN 50), XRD (X’Pert Pro PW3040/60), HRTEM (JEM-ARM200F), surface profilometer (Alpha-Step IQ), UV–vis diffuse reflectance spectroscopy (DRS) (Varian, CARY 100 Conc.), UV–vis spectrophotometer (Mapada, UV-1800).
4：Experimental Procedures and Operational Workflow
The titanium sheets were polished, then subjected to SMA treatment with TiO2 powder in a ball-milling chamber. The coating was characterized by SEM, EDS, XRD, HRTEM, and its photocatalytic activity was tested by UV–vis decolorisation of RB.
5：Data Analysis Methods
The photocatalytic degradation efficiency was determined by measuring the RB concentration under UV–vis light irradiation using a UV–vis spectrophotometer.
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SEM
Zeiss Ultra 55
Zeiss
Used to observe the microstructure of the TiO2 coating.
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EDS
Oxford X-MaxN 50
Oxford
Used for energy-dispersive X-ray spectrometry analysis of the coating.
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XRD
X’Pert Pro PW3040/60
PANalytical
Used for phase identification of the coating.
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HRTEM
JEM-ARM200F
JEOL
Used for high-resolution transmission electron microscopy observation of TiO2 particles.
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SPEX mill
SPEX/8000M
SPEX
Used for surface mechanical alloying (SMA) treatment to prepare nanostructured TiO2 coating.
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surface profilometer
Alpha-Step IQ
KLA-Tencor
Used to measure the surface roughness of the titanium plate.
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UV–vis diffuse reflectance spectroscopy
CARY 100 Conc.
Varian
Used for UV–vis diffuse reflectance spectroscopy analysis.
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UV–vis spectrophotometer
UV-1800
Mapada
Used to determine the RB concentration during photocatalytic degradation.
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