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For problems 1 through 3, use the Zx charts provided | Chegg.com,Titanium niobium oxides (TiNb2O7): Design, fabrication and,Porphyrin-based MOFs for photocatalysis in water,For problems 1 through 3, use the Zx charts provided | Chegg.com,A review on applications and challenges of carbon nanotubes