Influence of calcination temperature on the properties and photocatalytic efficiencies of BiFe<sub>0.9</sub>Cu<sub>0.1</sub>O<sub>3</sub> nanoparticles.

A clear trend is observed where the SSA decreases with increasing calcination temperature up to 700 °C, then increases at 800 °C.

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In contrast, both the dislocation density (δ) and micro-strain (ε) exhibited a decreasing trend with increasing temperature, which can be attributed to particle agglomeration and crystallite growth.

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