**Thanks**

*Perovskite and Piezoelectric Materials*

**Perovskite system Synthesis** 

SrTi0.1Fe0.9O3−δ SG Solar

SrFe0.5Co0.5O3−δ SG Solar

La0.8Ba0.2Fe0.9Mn0.1O3−<sup>x</sup> SG Solar

Bi5−xLaxTi3FeO15 SS Solar

SrBi2Nb2O9 SG

Bi5Ti3FeO15 HT

*Perovskite materials used as photocatalysts (ABO3, AAI*

Bi3SrTi2TaO12 Bi2LaSrTi2TaO12

**Table 1.**

*degradation of pollutants.*

**process**

LaFe0.5Ti0.5O3 SG UV Phenol [90] Bi(Mg3/8Fe2/8Ti3/8)O3 MS Visible MO [110] LaTi(ON)3 SG Visible Acetone [214] (Ag0.75Sr0.25)(Nb0.75Ti0.25)O3 SS Visible CH3CHO [215]

Cu-(Sr1−yNay)(Ti1−xMox)O3 HT Visible Propanol [118] BiFeO3–(Na0.5Bi0.5)TiO3 SG Visible RhB [120]

ABi2Nb2O9 (A = Sr, Ba) SG UV MO [147]

Ba5Ta4O15 HT UV RhB [154] N-doped Ln2Ti2O7 (Ln = La, Pr, Nd) HT Visible MO [217] CdS/Ag/Bi2MoO6 SG Visible RhB [218] *SS: solid state; HT: hydrothermal; SG: sol-gel; BM: ball-milling; ES: electronspun; MW: microwave; Comb.: combustion; US: ultrasonic; MS: molten salt; Imp.: impregnation; Ads.: adsorption; ST: solvothermal; RhB: rhodamine B; MO: methyl orange; MB: methylene blue; 4-cp: 4-chlorophenol; MG: malachite green; CR: congo red;* 

SS

SS

*NO: nitrogen monoxide; PA: isopropyl alcohol; TC: tetracycline; and PCP: pentachlorophenol.*

**Light source**

light

light

light

light

*BO3, AAI*

*SEM patterns of BiFeO3: (a) microspheres and (b) microcubes. The intensified pictures are revealed in the upper part inserts. Recopied with consent from Ref. [147]. Copyright © 2010, American Chemical Society.*

*BO3, ABBI*

**Pollutants References**

MO [103]

CR [213]

MO [115]

RhB [151]

*O3, AB(ON)3, and AAI*

[149, 150]

*BBIIO3) for* 

UV Aniline, RhB [145, 146]

Visible RhB, CH3CHO IPA

SS UV RhB [216]

**12**

**Figure 2.**

I am thankful to Department of Chemistry, University College of Science, Osmania University, for their continuous attention in this study and useful discussions, and to Prof. B. Manohar for her support in working on the chapter.
