Text this: Incorporation of NiO into SiO<sub>2</sub>, TiO<sub>2</sub>, Al<sub>2</sub>O<sub>3</sub>, and Na<sub>4.2</sub>Ca<sub>2.8</sub>(Si<sub>6</sub>O<sub>18</sub>) Matrices: Medium Effect on the Optical Properties and Catalytic Degradation of Methylene Blue
