SrTiO3 Content Research Articles

Nanocrystallization tuning of structural, thermoelectric and electrical properties of SrTiO3-doped vanadate glasses

Glass-ceramic nanocrystals (GCNs) were obtained by annealing parent SrTiO3-V2O5 (SV) glasses prepared using the melt-quenching technique at the crystallization temperature, Tc. The amorphous nature and glassy behavior of the quenched glasses were confirmed by XRD, DSC and FTIR spectroscopy. In the heat-treated samples, the crystal size was found to range from 40 to 80 nm for all studied samples. It was observed that as the SrTiO3 content in the GCNs increased, density (d) steadily rose. The change of vanadium ions concentration(C) has the predominant role for changing Seebeck coefficient in both glass and GCNs samples. The nanocrystallization process at temperatures close to the onset of Tc, lasting for one hour, notably increased the electronic conductivity of the initial glasses. Consequently, the modification in nanostructure resulted in enhanced conductivity. In comparison to the original glasses, the final materials demonstrated significantly improved electrical conductivity. The accumulation of V4+-V5+ pairs at the formed interlayer zones between nanocrystallites and the glassy phase is accountable for electron hopping in the current system, which is markedly higher than in the glassy matrix. The formed nanocrystallites play a crucial role in augmenting the conductivity of such nanomaterials. The maximum obtained value of the power factor (PF) is 0.9 × 10−4 mW/mk2 for the glass sample (x = 20) reflecting a very low thermoelectric power conversion efficiency while in GCNs, the PF values were well-enhanced to 0.6 mW/m.K2 at x = 20.

Simultaneously enhanced ferroelectric and magnetic properties of SrTiO3‐modified Bi0.88Sm0.12FeO3 ceramics

AbstractIn the present study, SrTiO3 was selected to enhance the multiferroic characteristics of Bi0.88Sm0.12FeO3 (BSF) ceramics. With increasing SrTiO3 content, the principal phase of BSF ceramic transitions from rhombohedral R3c to Pna21. Through DSC and dielectric analysis, it was observed that both the Curie temperature and Néel temperature decreased proportionally with the augmentation of SrTiO3 content. When x = .1, the optimal ferroelectric performance is achieved, and the highest remanent polarization value is 55.47 µC/cm2, significantly surpassing that of BSF ceramics. Moreover, the PFM test results showed that as the substitution content increased, the domains in the BSF ceramic gradually transformed from normal ferroelectric domains to polar nanomicro‐domains. Magnetic and magnetoelectric results show that when x = .1, the best magnetic properties are obtained, Mr = 59.7 emu/mol. The magnetoelectric coefficient αME initially increased and then decreased with the increasing SrTiO3 content, reaching its optimum magnetoelectric properties at x = .1, where αME = .47 mV cm–1 Oe–1. In summary, when the substitution amount of SrTiO3 reaches 10%, the ferroelectric, magnetic, and magnetoelectric properties of BSF ceramics are significantly improved.

Microstructure and properties of SrTiO3/ZrO2 ceramic composites prepared through pressureless sintering

Zirconia (ZrO2) ceramics have excellent mechanical properties; however, their electrical properties are poor, which significantly limits their applications in electronic communication devices. To broaden the application field of ZrO2 ceramics, SrTiO3 with excellent dielectric properties was added to ZrO2 in this study, and SrTiO3/ZrO2 ceramic composites were prepared through pressureless sintering. The effects of SrTiO3 contents on the microstructure and properties of SrTiO3/ZrO2 ceramics were studied. The results indicated that the sintered sample contained t-ZrO2 and SrTiO3 phases. The SrTiO3 phase was uniformly distributed in the ZrO2 matrix. Within certain temperature and frequency ranges, the SrTiO3/ZrO2 ceramic composites exhibited stable relative dielectric constant and dielectric loss. When the SrTiO3 content was 35 wt%, the SrTiO3/ZrO2 ceramic composites exhibited the best comprehensive properties, with the relative density, open porosity, fracture toughness, bending strength, Vickers hardness, relative dielectric constant, and dielectric loss being 98.7%, 0.21%, 7.27 MPa m1/2, 404 MPa, 11.8 GPa, 105, and 0.003, respectively.

Composition design of BNBT-ST relaxor ferroelectric ceramics in superparaelectric state with ultrahigh energy density

BNT-6BT-based lead-free ceramics have gained significant attention due to their relatively large piezoelectric coefficients and tunable morphotropic phase boundary conditions. In this investigation, SrTiO3 (ST) was added to BNT-6BT ceramics to fabricate the BNT-6BT-xST (BNBT-xST) composition. The impact of ST content on the phase structure and dielectric permittivity of the BNBT-xST ceramics was studied. The XRD refinement data show that with increasing ST content, the crystal structure of BNBT-xST ceramics was transformed from the morphotropic phase structure (coexisting tetragonal (P4/mmm) and pseudo-cubic (Pmm) phase) to the pseudo-cubic phase. The dielectric permittivity data of the BNBT-80ST showed that the Tm (the maximum permittivity temperature) moved to −61.9 °C, which caused the room temperature to fall within the range of Tm < T < TB (the Burns temperature). This makes the BNBT-80ST a superparaelectric state in relaxor ferroelectrics (RFE). Furthermore, the maximum energy density and the charge-discharge efficiency of the BNBT-80ST achieved 5.48 J/cm3 and 87% at 495 kV/cm, respectively. The energy density of the BNBT-80ST was improved by 2.97-fold and 49% compared with that of the BNBT-30ST and BNBT-70ST. This is mostly attributed to weakened ferroelectricity and improved paraelectricity in the BNBT-80ST. This investigation demonstrates that BNBT-xST ceramics can be adjusted to a superparaelectric state with an ST content of 80%. This makes the material to possess both a large polarization and a high breakdown field. This material holds great promise for high energy density capacitor applications.

Layered SrTiO3/BaTiO3 composites with significantly enhanced dielectric permittivity and low loss

Ferroelectric ceramic materials are receiving increasing attention due to their extensive applications in electrical systems. In this work, three-layer BaTiO3/SrTiO3 ceramic composites consisting of one Ba1-xTiO3-SrxTiO3 (at x = 5, 10, 20 and 30) composite interlayer sandwiched by two BaTiO3 outer layers were fabricated. And the effects of SrTiO3 modification on their phase structures, microstructures and dielectric performance were studied in detail. A pure perovskite phase was observed in the Ba1-xTiO3-SrxTiO3 ceramic composites. The BaTiO3 ceramic doping by SrTiO3 exhibited refined grain size. With increased SrTiO3 content, both the permittivity and dielectric loss have increased. Furthermore, a layered structure was designed to enhance the dielectric properties. Consequently, a high permittivity of 7118 and low loss of 0.028 were achieved at 10 kHz in BaTiO3-30 w% SrTiO3–BaTiO3 three-layer ceramic composites. In summary, the introduction of SrTiO3 is believed to reduce the BaTiO3 Curie temperature and greatly improve its permittivity at room temperature. Furthermore, the accumulation of charge carriers at the interface significantly increases the permittivity, while preventing the transport of the charge carriers and reducing the loss. The ultrahigh permittivity and low loss make these composites promising candidates for microwave antennas, field effect transistors and dielectric capacitors.

Fabrication of Fe(Te,Se) films added with oxide or chalcogenide: Influence of added material on phase formation and superconducting properties

Incorporation of a dopant, an impurity, and a non-superconducting second phase in superconducting films is an important approach to control the superconducting property. In spite of extensive studies on the oxide superconducting nanocomposite films, the influence of additive materials on the phase formation and nanostructure is unclear in the iron based superconducting chalcogenide, Fe(Te,Se). Here, the incorporation of oxide or chalcogenide in Fe(Te,Se) films using pulsed laser deposition was investigated. When TiO2, Fe2O3, Yb2O3, CeO2, Nb2O5, SnSe, or SnTe was added, c axis oriented Fe(Te,Se) films were not formed. On the other hand, c axis oriented Fe(Te,Se) films were obtained when SrTiO3 was added at the content of 3–10 areal% and the deposition temperature of 400–550 °C. While a characteristic nanostructure originating from SrTiO3 was not observed for the small SrTiO3 content (3%), the nanocomposite structure comprising of nanocolumns was formed for the large SrTiO3 content (10%). The critical temperature was 8.2–8.6 K in the Fe(Te,Se) + SrTiO3(3%) thin films deposited at 500 °C, while the critical temperature was ∼10 K in the Fe(Te,Se) films. The irreversibility curve behavior was varied by the structural change in the natural pinning centers, which resulted from the SrTiO3 addition, while the pinning effect by the nanocomposite structure was concealed by the Tc degradation in the case of the large amount of SrTiO3 addition. Considering the dependence of the film structure on the additive material and the incorporation content, the superconducting properties of Fe(Te,Se) films should be designed.

Effect of different pore formers on the performance of lead free piezoelectric ceramics

Ceramics based piezoelectric materials with unique porous microstructure and chemical compositions are regarded suitable for advanced applications due to their distinct properties. In this work, NKN-ST [(1-x) (Na0.5 K0.5 NbO3)—x (SrTiO3)] specimens were prepared by conventional solid-state method. Using different pore forming agents such as ammonium oxalate monohydrate and graphite, porous piezoelectric ceramics were processed to obtain different porous configuration by sacrificial foaming method. Scanning electron microscopy showed a continuous structure with interconnectivity. The phase structure, dielectric and piezoelectric properties of the samples were systematically investigated on the effects upon addition of SrTiO3 content and different porogens.

Self-organized formation of a-few-nanometer sized nanocolumns in chalcogenide-oxide nanocomposite film

Nanocomposite films are thin films with the addition of nano-sized second phases, and they are very promising for improving properties of chalcogenide films, such as superconducting vortex pinning. However, there are very few reports on the chalcogenide nanocomposite films, although many researchers are studying the oxide nanocomposite films. Since the process conditions for chalcogenide films are different from those for oxide films, the chalcogenide nanocomposite films are expected to have a characteristic structure. Here, we show fabrication of chalcogenide nanocomposite films containing self-organized oxide nanocolumns. FeSe+SrTiO3(STO) nanocomposite films were prepared using pulsed laser deposition, where the FeSe target with the STO sector was laser-ablated. The FeSe matrix kept the epitaxial relationship with LaAlO3 substrates even in the nanocomposite films, but the crystallinity and orientation of FeSe were degraded. Transmission electron microscopy observation clarified that Sr-Ti-O nanocolumns with the diameter of 2-5 nm and the spacing of <10 nm were formed at the deposition temperature of 450-550 ºC and the STO content of <25areal%. The formation of the FeSe+STO nanocomposite was affected by the low deposition temperature and interface instability. As a result, the nanocolumn diameter in the present chalcogenide-oxide nanocomposite was smaller than that in the oxide-oxide nanocomposites. This nanocolumn morphology (shape, diameter, and spacing) is expected to effectively influence the properties of chalcogenides.

Varistor performance of a SnO2-based system doped with low content of SrTiO3

The search and design of new SnO2-ceramics with non-linear current-voltage behavior is quite an important task due to the possibility of their practical application as varistors, devices for the protection of electrical circuits against voltage surges. This work reports the doping impact of the low content of SrTiO3 (0, 0.05, 0.1, 0.2, and 0.4 mol%) on the microstructure and non-ohmic properties of the SnO2-Co3O4-Cr2O3-Nb2O5 system which is frequently used in varistor design. It is found that the SrTiO3-addition results in the increase of activation energy of electrical conduction and the decrease of the leakage current in obtained materials compared with undoped ceramics. The reported materials with SrTiO3-addition possess a smaller average grain size, higher porosity, and their density is lower than that of unmodified SnO2-Co3O4-Cr2O3-Nb2O5 ceramics. The highest non-linear coefficient (α = 17.24) is observed for material with 0.05 mol% SrTiO3 while for undoped ceramics it reaches only 2.68. Energy dispersive spectroscopy (EDS) revealed agglomeration of SrTiO3 which was observed in materials with 0.1–0.4 mol% of SrTiO3. The obtained results are discussed in terms of the known barrier model for varistors based on the information from dc and ac electrical measurements, scanning electron microscopy, X-ray diffraction patterns, and EDS-data.

Synthesis, thermal and dielectric performance of PVA-SrTiO3 polymer nanocomposites

The paper considers PVA-SrTiO3 nanocomposite films produced successfully by the conventional solution-mixing route. Data for this study were collected using various experimental methods such as XRD, SEM, FTIR, TGA, as well as dielectric measurements. XRD analysis showed nanostructured SrTiO3 with cubic crystal structure and pure PVA has a semicrystalline structure. SEM images for the surface of nanocomposite films presented a uniform distribution of the nanoparticles. From the FTIR spectra, the addition of nano-SrTiO3 changed the position of PVA absorption bands. The thermal stability of these films was enhanced, as confirmed by the TGA analyses. There was a variation in the dielectric constant with SrTiO3 content and the sample containing 15.0 wt% had the highest value. All the PVA-SrTiO3 nanocomposite films revealed a lower energy density than the pure PVA polymer. Besides, the values of ε∞, εs and Δε decreased with increasing the SrTiO3 up to 10.0 wt%, but increased at 15.0 wt%. Finally, both AC and DC electrical conductivity showed a slight change with the variation in SrTiO3 concentration.

Structural, electrical properties and stability in microwave dielectric properties of (1−x) MgTiO3-x SrTiO3 composite ceramics

Development of (1−x) MgTiO3 (MTO)-x SrTiO3 (STO) (for x = 0.04, 0.1–0.5) composite ceramics and tuning of temperature coefficient of resonant frequency (τf) near to zero through solid state reaction method have been reported. The MTO and STO crystals physically diffused together to form a single crystal structure without any trace of chemical interaction. A gradual improvement in dielectric constant (18.74–85.55) with an increase in STO content is obtained for the composite ceramics. Further, the dielectric constant remained almost invariant for a broad frequency range (100 Hz–100 MHz). However, temperature-dependent dielectric constant exhibited significant dispersion. The perusal of Mott’s variable range hopping 3-d model revealed the dominance of short-range hopping (<3 nm) in the composite ceramics. The activation energies for conduction are found to be decreasing (172–83 meV) with STO content which might be attributed to the increase in density of states from 1.65 × 1019 eV−1 cm−3 to 3.413 × 1020 eV−1 cm−3. The (1-x) MgTiO3-x SrTiO3 (for x = 0.04) composite ceramics exhibited best microwave dielectric properties with moderate quality factor (Q × f0) ~26,154 GHz at 8.08 GHz and better thermal stability (τf ~1.76 ppm/K). All the physical parameters followed cubic relation with STO content. The obtained microwave dielectric properties of 0.96MTO-0.04STO composite ceramics are suitable for microwave communication applications as microwave filters, resonators.

On the performance of polymer-inorganic perovskite oxide composite light-emitting diodes: The effect of perovskite SrTiO3 additives

This study reports the performances of a single structured light-emitting diode (LED) devices based on polymer material poly(9,9-di- n-hexylfluorenyl-2,7-diyl) (PHF) mixed with various concentrations of perovskite oxide strontium titanate (SrTiO3) particles deposited as a composite PHF: SrTiO3 emitting layer. The performances of the single structured organic LED indium tin oxide (ITO)/PHF/aluminum (Al) device and the composite LED ITO/PHF: SrTiO3/Al devices were compared in terms of turn-on voltage and luminance intensity. By incorporating perovskite SrTiO3 particles into PHF emitting layer, the turn-on voltage of the device is significantly reduced from 11.25 V to 1.80 V and the luminance intensity increased from 57.7 cd/m2 to 609 cd/m2. The improvement of turn-on voltage and the electroluminescence spectrum of the composite devices were found to be dependent on the weight ratios of SrTiO3 content in the PHF emitting layer.

Internal-strain release and remarkably enhanced energy storage performance in PLZT–SrTiO3 multilayered films

The multilayered composite films combining antiferroelectric (AFE) Pb0.97La0.02(Zr0.95Ti0.05)O3 (PLZT) with paraelectric (PE) SrTiO3 (STO) have been fabricated by the sol–gel method, and their ferroelectric and energy storage performances were carefully investigated. It was revealed that both the dielectric breakdown strength (Eb) and the maximum polarization (Pm) in the multilayered composite films are increased. Consequently, an ultra-high and recoverable energy storage density (Wre) of ∼101 J/cm3 and a high efficiency (η) of ∼62% were achieved in the composite film with an 18 wt. % STO content. The enhanced Wre in the multilayered composite is attributed to the internal-strain release of the PLZT layers and charge blocking by the STO layers with significantly enhanced Eb. The results suggest an effective way of improving the energy storage performances by combining AFE PLZT and PE STO.

Fabrication and characterization of composites of a perovskite and polymers with high dielectric permittivity

Composites of strontium titanate (SrTiO3) at loadings up to 50 vol.% with polar poly(butylene terephthalate) (PBT) and non-polar linear low density polyethylene (LLDPE) were prepared to investigate their dielectric responses in the wireless frequency range. The SrTiO3 particles were uniformly dispersed in the polymers at low loadings, but were more bead-like and agglomerated at higher SrTiO3 loadings. The SrTiO3 has a strong nucleating effect on both polymers, increasing the crystallization temperature and reducing the crystallinity of both polymers. Dielectric properties of composites were measured between 2.45−5 GHz. Dielectric permittivity (ε') of composites at 2.45 GHz increased with increasing SrTiO3 content. ε' increased by a factor of 5 for PBT, from 3.7 for unfilled PBT to 16.5 and by a factor of ∼8.5 for unfilled LLDPE, from 2.3 to 19.7 for maximum SrTiO3 loading. The composites had similar dissipation factor values as the unfilled polymers. The Lichtenecker model was in good agreement with the experimental data.

Effect of SrTiO3 Nanoparticles in Conductive Polymer on the Thermoelectric Performance for Efficient Thermoelectrics.

We present hybrid organic inorganic materials, namely, SrTiO3/polyaniline (PANI) composites, with high thermoelectric performance; samples with various SrTiO3 contents (10, 20, 30, and 50 wt.%) were prepared. The PANI component was obtained through the polymerization of aniline monomers, followed by camphosulfonic acid-doping to enhance its electrical conductivity. SrTiO3, with a high Seebeck coefficient, was used as the N-type inorganic componenet; it was synthesized via a one-pot solvothermal methods and, then, dispersed into the conductive PANI matrix. The SrTiO3 content influenced the Seebeck coefficient and electrical conductivity of the resulting composites. The variations in the thermoelectric properties of the SrTiO3/PANI composites consequently changed their power factor; at room temperature, the highest value was ~49.6 μW·m/K2, which is 17 times larger than that of pure PANI.

(Bi1/2K1/2)TiO3–SrTiO3 solid-solution ceramics for high-temperature capacitor applications

The relaxor state of (Bi1/2K1/2)TiO3 exhibits promising dielectric properties for high-temperature capacitor applications, but the spontaneous phase transition into the low-temperature ferroelectric state and the excessively high dielectric maximum temperature (Tm) at around 360 °C are the main drawback to this material. In this study we examined solid solutions of (Bi1/2K1/2)TiO3 with SrTiO3 to improve the temperature stability of the dielectric properties. As precursors to fabricate the sold-solution ceramics, fine powders of (Bi1/2K1/2)TiO3 and SrTiO3 were both synthesized by the hydrothermal method. Dense (1 − x)(Bi1/2K1/2)TiO3–xSrTiO3 ceramics with x up to 0.5 were then obtained by reaction sintering of the powders. A crystal structure analysis revealed that the average symmetry of the solid-solution ceramics changes from tetragonal to cubic with increasing the SrTiO3 content. Dielectric measurements showed that the incorporation of SrTiO3 into (Bi1/2K1/2)TiO3 stabilizes the relaxor state to shift Tm largely toward lower temperatures. As a result, the sample with x = 0.5 exhibited a temperature-stable dielectric permittivity of 1700 ± 15% over a wide temperature range from room temperature up to 260 °C. The electric-field and temperature dependences of the energy-storage properties of the sample were also investigated.

Мёссбауэровские исследования свойств твердых растворов xBiFeO-=SUB=-3-=/SUB=--(1-x)SrTiO-=SUB=-3-=/SUB=- (x=0.2/1.0; Delta x=0.1)

Systematic Mössbauer studies of the magnetic structure and phase transition in the xBiFeO3- (1-x) SrTiO3 solid solution, where x varies from 0 to 0.8 with a step of 0.1, have been carried out. The multiferroic BiFeO3 was modified by the introduction of SrTiO3 perovskite, and solid solutions xBiFeO3- (1-x) SrTiO3 were obtained, which simultaneously possess ferrimagnetic and ferroelectric properties at room temperature. In the obtained xBiFeO3- (1-x) SrTiO3 systems, according to X-ray diffraction studies, there are no additional phases, while the Mössbauer data indicate the presence of mullinite (Bi2Fe4O9) with a SrTiO3 content in the solid solution from x = 1.0 to x = 0.8. The Mössbauer spectra of the xBiFe3- (1-x) SrTi3 system at room temperature show that with a decrease in the amount of BiFeO3 in the solid solution, the magnetic hyperfine field values ​​decrease and the absorption line widths increase due to the weakening of the magnetic exchange interaction. For compositions with x &lt;0.5, the Mössbauer spectra indicate the paramagnetic state of the solid solution. Based on the dependence of the Zeeman line intensity on the BiFeO3 content in the xBiFeO3- (1-x) SrTiO3 solid solution, it was found that the transition to the paramagnetic state of the xBiFeO3- (1-x) SrTiO3 system at room temperature occurs near the value x = 0.4 (between x = 0.3 and x = 0.5).

Study of the relaxation and resonance behaviors of ternary composites: Epoxy–strontium titanate–carbon black

The principal subject of the present article is the study of the phenomenon of dispersion as well as the effect of the concentration of strontium titanate (SrTiO3) and carbon black on the complex permittivity of ternary composites: epoxy resin–SrTiO3 –black carbon. The relative permittivity of the mixtures as a function of volume fraction of SrTiO3 was modeled by the modified Lichtenecker mixing law (MLL). A new dispersion model, based on the Lorentzian resonance model, has been proposed to describe the frequency behavior of complex permittivity. For these ternary composites, the frequency dispersion behavior of the complex permittivity that exhibits both relaxation and resonance spectra with increasing SrTiO3 concentration has been showed. The new empirical equation proposed in our work has been well describing the complex permittivity of resonance type for the SrTiO3 and carbon black composites. The effects of SrTiO3 content on the electromagnetic properties and absorption characteristics of electromagnetic waves of epoxy resin composites were studied. As the volume fraction of SrTiO3 increases, it was confirmed that the complex permittivity of the composites follows the MLL and the resonant frequency shifted toward the high frequency range. The resonance frequency of the composites was estimated in good agreement with the theoretical values calculated by the second new equation proposed in this article. Complex permittivity is measured using time domain spectroscopy in the frequency range direct current (DC) to 30 GHz.

SrTiO3/TiO2 heterostructure nanowires with enhanced electron-hole separation for efficient photocatalytic activity

Heterostructure is an effective strategy to facilitate the charge carrier separation and promote the photocatalytic performance. In this paper, uniform SrTiO3 nanocubes were in-situ grown on TiO2 nanowires to construct heterojunctions. The composites were prepared by a facile alkaline hydrothermal method and an in-situ deposition method. The obtained SrTiO3/TiO2 exhibits much better photocatalytic activity than those of pure TiO2 nanowires and commercial TiO2 (P25) evaluated by photocatalytic water splitting and decomposition of Rhodamine B (RB). The hydrogen generation rate of SrTiO3/TiO2 nanowires could reach 111.26 mmol·g−1·h−1 at room temperature, much better than those of pure TiO2 nanowires (44.18 mmol·g−1·h−1)and P25 (35.77 mmol·g−1·h−1). The RB decomposition rate of SrTiO3/TiO2 is 7.2 times of P25 and 2.4 times of pure TiO2 nanowires. The photocatalytic activity increases initially and then decreases with the rising content of SrTiO3, suggesting an optimum SrTiO3/TiO2 ratio that can further enhance the catalytic activity. The improved photocatalytic activity of SrTiO3/TiO2 is principally attributed to the enhanced charge separation deriving from the SrTiO3/TiO2 heterojunction.

Synthesis and Enhanced Photocatalytic Activity of Porous SrTiO₃/TiO₂ Composites.

Porous photocatalysts have attracted significant attention for their large specific surface area, numerous surface catalytic active sites, and high photocatalytic activity. In this study, porous SrTiO₃/TiO₂ composites were successfully fabricated through a hydrothermal approach utilizing porous TiO₂ as a substrate. The as-synthesized SrTiO₃/TiO₂ composites were then characterized by X-ray diffraction, scanning electron microscopy (SEM), transmission electron microscopy, Brunauer-Emmett-Teller (BET), and ultraviolet-visible spectroscopy (UV-Vis) analysis. The results of SEM and BET indicate that such composites have a porous structure and large surface area. Compared to unadulterated TiO₂, SrTiO₃ /TiO₂ composites exhibit higher photocatalytic performance for the photodegradation of rhodamine B under UV-Vis irradiation. Additionally, it was found that when the content of SrTiO₃ reaches 20%, it achieves the maximum photodegradation efficiency of 98.6% under UV-Vis irradiation over 60 min. These results demonstrate that SrTiO₃/TiO₂ composites are a promising material in terms of environmental cleanliness.