Photo-catalysis for muliferroic nanostructures has pervasive applications to solve the existing environmental issues and green energy issues of society. In the present paper, we examined the effect of La³⁺ (x = 0.04, 0.08, 0.12) doping on photo-catalysis and multiferroic applications of Bi_1-xLa_xFeO₃ (L1, L2 & L3), which were synthesized via sol–gel methodology. The L1, L2 & L3 samples were characterized via XRD, FESEM (field emission scanning electron microscopy), UV–visible spectrometer, Impedance spectroscopy, Current-voltage characteristics, P-E, VSM, Photo-catalysis for degradation of MB dye. The surface area is found to be reasonably high in the range of 7.6–12.1 m²/g. The maximum value of current density is found to be 2.52, 2.12 and 1.56 µA-cm⁻², respectively, for L1, L2 & L3. The dielectric constant (ε′) was measured for all the samples with variation of frequency (10 Hz to 5 MHz) at selected temperatures (300 K to 573 K). The AC conductivities (σ_ac) of the samples are increasing with the function of frequency and temperature. The photocatalytic degradation efficiencies were enlarged from 60.81% to 78.82% with the substitution of La³⁺ in BFO. Additionally, the ferroelectric and magnetic responses were recorded which are to be significantly influenced via La³⁺ doping and saturation polarization (P_s) and saturation magnetization (M_s) values are found to be increased from 0.41 to 0.65 µC/Cm² and 0.66 to 1.14 emu/gm and, respectively.

多相纳米结构的光催化已广泛应用于解决社会现有的环境问题和绿色能源问题。在本文中，我们研究了La ³⁺（x = 0.04，0.08，0.12）掺杂对Bi _1-x La _x FeO ₃（L1，L2和L3）的光催化和多铁性应用的影响。通过溶胶凝胶法。通过XRD，FESEM（场发射扫描电子显微镜），紫外可见光谱仪，阻抗谱，电流-电压特性，PE，VSM，光催化降解MB染料对L1，L2和L3样品进行了表征。发现表面积在7.6-12.1 m ²的范围内相当高/G。对于L1，L2和L3 ，发现电流密度的最大值分别为2.52、2.12和1.56μA-cm ^-2。在选定的温度（300 K至573 K）下，测量所有样品的介电常数（ε'），其频率会发生变化（10 Hz至5 MHz）。交流电导率（σ_交流样品）与频率和温度的函数增加。用BFO中的La ³⁺取代，其光催化降解效率从60.81％提高到78.82％。此外，还记录了铁电和磁响应，这些响应会受到La ³⁺掺杂和饱和极化（P _s）和饱和磁化强度（M _s）的显着影响_。）值分别从0.41增至0.65 µC / Cm ²和从0.66增至1.14 emu / gm和。