Bi2WO6 Microspheres Research Articles

Facile construction of Bi2WO6/TiO2 microspheres heterojunction for boosting photocatalytic degradation of organic dyes

Flower-like Bi2WO6 microspheres and TiO2 spherical particles were prepared by a facile hydrothermal method without any surfactant or template. A unique Z-Scheme Bi2WO6/TiO2 heterojunction was successfully synthesized via a simple physical mixing method. The effect of mass ratio on the structure, morphology, optical properties, BET surface area and photocatalytic performance evaluated by degradation of organic dyes including Rhodamine B (RhB), methylene blue (MB) and methyl orange (MO) under solar irradiation was systemically investigated. When the mass ratio of Bi2WO6 to TiO2 was 1:4, the Bi2WO6/TiO2 composites exhibited the highest photocatalytic degradation efficiency, the highest degradation efficiency of RhB and MB reached 95.2 % and 89.3 %, which could be attributed to the construction of heterojunction structure between TiO2 and Bi2WO6. The optical absorption capacity of Bi2WO6/TiO2 composites was stronger than pure TiO2. Furthermore, the radicalquenching experiments proved that ·O2– and h+ played crucial roles in the photocatalytic reaction. The suitable band structure of Bi2WO6 and TiO2 revealed the Z-Scheme pathway and possible photocatalytic mechanism of Bi2WO6/TiO2 composites for organic dyes degradation. Thus, the direct Z-scheme Bi2WO6/TiO2 heterojunction effectively promoted separation of photogenerated electron-hole pairs, resulting in higher photocatalytic activity.

Integrating BaFe2O4 nanoparticles onto N-doped Bi2WO6 microspheres for eminent visible light-driven photocatalytic performance towards aquaculture contaminants and pathogens

Constructing highly effective visible light-responsive photocatalysts with robust redox capability is of great significance for remediation of environmental contaminants. Herein, a novel Z-scheme 0D/3D BFO/NBWO composite was successfully fabricated via a facile precipitation-hydrothermal approach. The physicochemical and optoelectronic properties of the obtained photocatalysts were affirmed via different characterization techniques. Under visible light irradiation, the 2-BFO/NBWO composite demonstrated the top-flight photocatalytic degradation of tetracycline (TC), which was 10.6, 6.0, 4.2 and 4.6-fold greater than those of BFO, BWO, NBWO and 2-BFO + NBWO, respectively. Such photocatalytic enhancement was primarily attributed to the acceleration of charge separation and migration in Z-scheme heterojunction. Additionally, the 2-BFO/NBWO composite displayed good versatility to pH variation in the solution, resistance to coexisting anions and humic acid as well as satisfactory reusability after five-cycle experiments. More importantly, real aquaculture effluent-containing TC, bisphenol A (BPA), malachite green (MG) and hexavalent chromium (Cr(VI)) were also successfully treated. The toxicity findings also proved that the treated aquaculture effluent appeared to have no significant noxious effect on Danio rerio after 2-BFO/NBWO photocatalysis. In addition to the examination of organic contaminants degradation, the prepared 2-BFO/NBWO composite was also effectively used to eradicate Escherichia coli (E. coli) and Bacillus cereus (B. cereus). The hydroxyl radicals were found to make predominant contributions to the photocatalytic reactions. This work gives a new avenue for fabricating Z-scheme composite photocatalysts with effective interfacial charge migration to degrade various organics and to eradicate pathogens from effluents.

Cerium-substituted hierarchical Bi2WO6 microspheres for the effective removal of chloramphenicol and rhodamine B dye through photocatalysis

Cerium-substituted hierarchical Bi2WO6 microspheres for the effective removal of chloramphenicol and rhodamine B dye through photocatalysis

Construction of AgCl/Bi2WO6 heterojunction for effective removal of RhB dye

Flower-like Bi2WO6 microspheres were prepared by a facile hydrothermal method, and AgCl/Bi2WO6 heterojunction was successfully synthesized by in-situ precipitation method. The samples were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and UV-vis diffuse reflectance spectroscopy (DRS). The effect of AgCl loading in AgCl/Bi2WO6 composites on the degradation of Rhodamine B (RhB) was also investigated. When the mass ratio of AgCl to Bi2WO6 was 4:1, AgCl/Bi2WO6 composites exhibited the highest photocatalytic degradation efficiency of 87.9% within 30 min, which could be attributed to the construction of heterojunction structure that effectively promoted the separation of photogenerated electron-hole pairs.

Bromine Ion-Intercalated Layered Bi2WO6 as an Efficient Catalyst for Advanced Oxidation Processes in Tetracycline Pollutant Degradation Reaction.

The visible-light-driven photocatalytic degradation of pharmaceutical pollutants in aquatic environments is a promising strategy for addressing water pollution problems. This work highlights the use of bromine-ion-doped layered Aurivillius oxide, Bi2WO6, to synergistically optimize the morphology and increase the formation of active sites on the photocatalyst's surface. The layered Bi2WO6 nanoplates were synthesized by a facile hydrothermal reaction in which bromine (Br-) ions were introduced by adding cetyltrimethylammonium bromide (CTAB)/tetrabutylammonium bromide (TBAB)/potassium bromide (KBr). The as-synthesized Bi2WO6 nanoplates displayed higher photocatalytic tetracycline degradation activity (~83.5%) than the Bi2WO6 microspheres (~48.2%), which were obtained without the addition of Br precursors in the reaction medium. The presence of Br- was verified experimentally, and the newly formed Bi2WO6 developed as nanoplates where the adsorbed Br- ions restricted the multilayer stacking. Considering the significant morphology change, increased specific surface area, and enhanced photocatalytic performance, using a synthesis approach mediated by Br- ions to design layered photocatalysts is expected to be a promising system for advancing water remediation.

S-scheme MIL-101(Fe) octahedrons modified Bi2WO6 microspheres for photocatalytic decontamination of Cr(VI) and tetracycline hydrochloride: Synergistic insights, reaction pathways, and toxicity analysis

Solar-driven elimination of refractory contaminants is an ideal route to tackle the environmental issues. Nevertheless, the photocatalytic performance of photocatalysts is heavily restrained due to the insufficient accessible reactive sites and fast electrons/holes reunion. Herein, a novel metal–organic framework-based S-scheme heterostructure of MIL-101(Fe)/Bi2WO6 was synthesized by a simple solvothermal approach. The optimized MIL-101(Fe)/Bi2WO6 (MIL/BWO-2) affords the highest photo-activities under visible light, which are 13.7, 6.7 folds greater for Cr(VI) reduction, and 0.8, 10.5 folds higher for tetracycline hydrochloride oxidation compared with individual Bi2WO6 and MIL-101(Fe), respectively. The preeminent catalytic capability lies in two aspects: 1) the introduction of MIL-101(Fe) substantially enlarges the surface area of the composites, offering ample reaction sites and fostering pollutant adsorption and mass transportation; 2) the novel S-scheme photo-carrier transport mechanism assisted by oxygen vacancies favors spatial segregation and transport of photoinduced electrons/holes with superior redox capacity. Reactive species identification experiments verify that O2– and e– dominantly contribute to Cr(VI) reduction, while O2–, h+ and OH account for tetracycline hydrochloride destruction. Furthermore, the tetracycline photo-decomposition pathway, eco-toxicity evaluation, and photocatalytic mechanism were investigated comprehensively. This research paves the way for building high-performance MOFs-based S-scheme heterojunctions toward photocatalytic water purification.

Dual modification based on electrostatic repulsion of bentonite and SPR effect of Bi facilitate charge transfer of Bi2WO6 for antibiotics degradation.

Development of efficient photocatalysts is vital for light-driven removal of refractory antibiotics. Herein, Bi2WO6 microspheres were successfully anchored on the surface of bentonite, and metallic Bi was reduced in-situ by a one-step solvothermal method. Notably, the Bi/Bi2WO6/BT with a mass ratio of 0.15:1:0.1 exhibited the best photocatalytic activity toward degradation of tetracycline (TC) and ciprofloxacin (CIP) after 120min of visible light irradiation, and their reaction rate constants were 8.0 and 5.5 folds higher than that of pristine Bi2WO6, respectively. The boosted photocatalytic activity over Bi/Bi2WO6/BT was ascribed to the establishment of electrostatic repulsion and SPR effect, which synergistically promoted charges transfer, thus achieving more h+ and ·O2- radical generation. Moreover, possible TC and CIP degradation pathways over Bi/Bi2WO6/BT were proposed based on the identified intermediates, and most of the intermediates were less toxic than TC and CIP. The study provides options to develop high-efficiency photocatalytic composites for contaminants elimination using semiconductors and readily available bentonite.

Enhanced activity of hydrothermal prepared Nd/Pr-codoped Bi2WO6 microspheres in photodegradation of Rhodamine B

Bi2WO6 has attracted much attention as a photocatalyst, but its photocatalytic activity still need be improved for future practical application. Herein, Nd/Pr-codoped Bi2WO6 was prepared by hydrothermal method. XRD and FESEM demonstrate that the sample is orthorhombic phase with flower-like microspheres. PL display that the recombination rate of photogenerated electrons and holes becomes lower. N2 adsorption-desorption isotherms indicate that the specific surface area is significantly enlarged. In addition, codoping can improve photocatalytic performance remarkably. The photodegradation percentage of RhB reaches up to about 95.7% after only 10 min of irradiation and about 99.9% after 20 min. The enhanced photocatalytic activity could be due to the largest specific surface area and the lowest recombination rate of photogenerated electrons and holes. Furthermore, after eight photodegradation cycles, there was no significant loss for the photocatalytic activity. Therefore, NPBWO can be used as an efficient and stable photocatalyst.

Excellent photocatalytic rhodamine B degradation for water remediation over Pr3+ doped Bi2WO6 microspheres

In this work, a series of Pr3+ doped Bi2WO6 had been successfully prepared by one-step hydrothermal method. The prepared Pr- Bi2WO6 were characterized by XRD, UV–Vis DRS, PL, SEM, TEM, XPS and N2 adsorption–desorption to study their physical–chemical properties. Rhodamine B (RhB) was photodegraded as a target organic pollutant to investigate the photocatalytic activity of the as-prepared samples. The results show that Pr doping retains the phase and morphology of Bi2WO6, enlarges the specific surface area and reduces the recombination rate of photogenerated electrons and holes, thus the removal efficiency of RhB under simulated solar irradiation was remarkably improved. The optimum molar ratio of Pr to Bi2WO6 was 1%, whose degradation efficiency of RhB reached 99.4% within 20 min. The improved photocatalytic activity can be ascribed to the optimum optical absorption activity, the larger specific surface area and the morphology of microspheres which resulted in the effective separation of the photogenerated electron hole pairs. In addition, the h+ plays a major role in the photodegradation of RhB by all Pr doped Bi2WO6 samples according to the radical-trapping experiments.

Effect of Bi2WO6 nanoflowers on the U(VI) removal from water: Roles of adsorption and photoreduction

The efficient, safe, low-cost and easy to treatment of uranium(U(VI))-containing wastewater is still an imminent problem. Herein, the hierarchical hollow-spherical bismuth tungstate (Bi2WO6) was prepared by hydrothermal method, and sufficiently characterized by morphology and photoelectrochemical properties. In this research, we not only discussed the adsorption performance of U(VI), but also investigated the photocatalytic reduction performance of U(VI), so as to provide technical support for the treatment of U(VI)-containing wastewater in the future. The adsorption procedure complied with the pseudo-second-order model, implying surface complexation or chemisorption. Besides, under visible-light irradiation lasting for 600 min, the photoreduction removal rate of U(VI) was 53% (just adding 2.0 mg Bi2WO6), without adding the h+ scavenger, due to the harvest absorption of solar energy, hierarchically porous structure and synergic effect of adsorption and photocatalysis. Furthermore, the adsorption mechanism and photocatalytic reduction mechanism of Bi2WO6 for U(VI) were revealed. The metal 3O and O3H bonds in Bi2WO6 crystal were the active coordination sites for U(VI) adsorption, while •O2− and e- were the main active species for U(VI) photocatalytic reduction. Although the mechanisms of adsorption and photocatalytic reactions were different, there was a synergistic effect in the process of practical for application removing U(VI) by Bi2WO6. Consequently, the hierarchical nanosheets-assembled Bi2WO6 microspheres could be considered as a good candidate for visible-light-responsive photocatalyst in radioactive wastewater treatment.

Decrypting the photocatalytic bacterial inactivation of hierarchical flower-like Bi2WO6 microspheres induced by surface properties: Experimental studies and ab initio calculations

Bi2WO6 is considered an effective photocatalyst, even under the visible part of the solar spectrum, and recent advances in the modification of its structure leave promise for harnessing its enhanced effectiveness. Our experimental E. coli disinfection results have shown that the flower-like morphology brought considerable enhancement to the overall performance over the nanoparticle form. To clarify the photocatalytic mechanism of Bi2WO6, a combination of experimental and computational methods has been employed to investigate the surface properties of Bi2WO6 nanosheets self-assembly flower-like architecture. Although experimental evidence has determined the band edge positions of the as-synthesized samples, so as to address the photocatalytic properties, the mechanistic basis of this concept remains unclear. The calculation results demonstrated here deepen our understanding and indicate the potential of surface configuration to considerably alter the electronic structure and related photocatalytic properties of Bi2WO6 nanosheets. Firstly, we consider a range of surface slab models of Bi2WO6 (010) facet and calculate their surface Gibbs free energies. Having determined that the bi-termination is energetically more favorable by ab initio atomistic thermodynamics, hydrogen passivated termination was proved to be most stable. Through the analysis of the electronic band structure within the DFT-1/2 scheme and work function of the most stable termination, excellent agreement of experimental and theoretical predictions provided a meaningful understanding on the kinetic dependence of photocatalytic bacterial inactivation.

Enhanced UV–Vis–NIR composite photocatalysis of NaBiF4:Yb3+, Tm3+ upconversion nanoparticles loaded on Bi2WO6 microspheres

NIR light accounts for 50% of total solar energy, but only a small amount of the energy is applied to photocatalytic reactions. The incorporation of upconversion nanoparticles with semiconductor materials is an effective tactics to exploit NIR-driven photocatalyst. In this work, we report a composite material that can convert NIR light into UV–Vis photons. The light conversion material is composed of NaBiF4: Yb3+, Tm3+ up-conversion nanocrystals. The petal-like Bi2WO6 is used as a semiconductor photocatalyst to directly degrade model pollutants, such as RhB. By controlling the morphology of Bi2WO6, the contact area between the semiconductor photocatalyst and the pollutant molecules is increased. The preparation of “double bismuth” composite material NaBiF4:Yb3+, Tm3+/Bi2WO6 provides the possibility to make full use of sunlight. Under the excitation of simulated sunlight, the photocatalyst of NaBiF4:Yb3+, Tm3+/Bi2WO6 reaches the highest degradation efficiency of 98% in 27 ​min. Compared with Bi2WO6, the prepared composite photocatalyst shows better photocatalytic performance, which is attributed to the effective energy transfer between NaBiF4:Yb3+,Tm3+ and Bi2WO6. The capture tests were used to detect active species used in the degradation process. After four continuous photocatalytic cycles, about 95% of RhB solution is degraded. Under the simulated solar light illumination, the photocatalytic mechanism of the composite photocatalyst is discussed. The results propose a promising system to improve the photocatalytic activity through the efficient use of sunlight.

One-step synthesis of metallic Bi deposited Bi2WO6 nanoclusters for enhanced photocatalytic performance: An experimental and DFT study

Non-noble metallic Bi/Bi2WO6 nanocomposites were synthesized by one-step semi-solvothermal method with water - N-N Dimethylformamide (DMF) under mild conditions. The DMF solvent not only prevents the formation of impurities [Bi6O6(OH)3(NO3)3·1.5H2O] from Bi(NO3)3·5H2O hydrolysis, but also in situ reduces Bi3+ ions to metallic Bi. The DMF percentage ranges from 0 to 100%, and the Bi/Bi2WO6 nanocomposites prepared in a 50% DMF precursor (50-BWO) solution were the most effective in the degradation of rhodamine B (RhB) under simulated sunlight irradiation. The RhB degradation efficiency was about 2.98 and 71.8 times higher than those of pristine Bi2WO6 and Bi microspheres, respectively. Then, the photocatalytic mechanisms of Bi/Bi2WO6 were proposed based on DFT calculations and experimental results. The enhanced photocatalytic activity of Bi/Bi2WO6 results mainly from two factors: the surface plasmonic resonance (SPR) of metallic Bi (which enhances light absorption) and the formation of Ohmic junction between Bi microspheres and Bi2WO6 nanosheets. The ohmic junction facilitates the effective separation of photogenerated carriers, enhancing efficiency. Additionally, the ·O2– and h+ radicals are the main active species in the degradation of RhB. Last, the durability and stability of Bi/Bi2WO6 were verified by cyclic experiments.

Post-illumination activity of Bi2WO6 in the dark from the photocatalytic \u201cmemory\u201d effect

Photocatalysts with the photocatalytic “memory” effect could resolve the intrinsic activity loss of traditional photocatalysts when the light illumination is turned off. Due to the dual requirements of light absorption and energy storage/release functions, most previously reported photocatalysts with the photocatalytic “memory” effect were composite photocatalysts of two phase components, which may lose their performance due to gradually deteriorated interface conditions during their applications. In this work, a simple solvothermal process was developed to synthesize Bi2WO6 microspheres constructed by aggregated nanoflakes. The pure phase Bi2WO6 was found to possess the photocatalytic “memory” effect through the trapping and release of photogenerated electrons by the reversible chemical state change of W component in the (WO4)2− layers. When the illumination was switched off, Bi2WO6 microspheres continuously produced H2O2 in the dark as those trapped photogenerated electrons were gradually released to react with O2 through the two-electron O2 reduction process, resulting in the continuous disinfection of Escherichia coli bacteria in the dark through the photocatalytic “memory” effect. No deterioration of their cycling H2O2 production performance in the dark was observed, which verified their stable photocatalytic “memory” effect.

Visible-LED-light-driven photocatalytic degradation of ofloxacin and ciprofloxacin by magnetic biochar modified flower-like Bi2WO6: The synergistic effects, mechanism insights and degradation pathways

Bi2WO6 possesses good stability but poor photocatalytic activity under visible light. Herein, the coupling of Bi2WO6, Fe3O4 and biochar (Bi2WO6/Fe3O4/BC) was investigated to enhance the photocatalytic performance of Bi2WO6 through facile hydrothermal method, which almost completely degraded ofloxacin (OFL) and ciprofloxacin (CIP) within 30 min under energy-saving visible LED irradiation. The superior photocatalytic activity of Bi2WO6/Fe3O4/BC was ascribed to the stronger visible light adsorption capacity and the lower recombination of electron-hole pairs. O2− played a major role during the photocatalytic reaction. The characterization results suggested that the introduction of biochar avoided the agglomeration of Bi2WO6 microspheres and Fe3O4 nanoparticles, at the same time, the biochar participated in OFL and CIP photodegradation by consuming different oxygen-containing functional groups. In order to further evaluate the application potential of Bi2WO6/Fe3O4/BC, the effects of environment factors and the application in different actual water were carefully investigated. Various transformation products and the possible degradation pathways of OFL and CIP were analyzed based on high resolution mass spectrometry (HRMS) results, moreover, the toxicity evaluation results of Escherichia coli indicated these intermediates products were less toxic compared OFL and CIP. Overall, Bi2WO6/Fe3O4/BC can provide a potential way for the application of photocatalytic technology in ambient wastewater purification.

In situ construction of oxygen-vacancy-rich Bi0@Bi2WO6-x microspheres with enhanced visible light photocatalytic for NO removal

Surface oxygen vacancy defects and metal deposition on semiconductor photocatalysts play a critical role in photocatalytic reactions. In this work, oxygen-deficient Bi2WO6 microspheres have been prepared by a facile ethylene glycol-assisted solvothermal method. Bi0 nanoparticles were reduced by in situ thermal-treatment on Bi2WO6 microspheres to obtain Bi0@Bi2WO6-x as well as maintaining the oxygen vacancies (OVs) under N2 atmosphere. Afterwards, photocatalytic NO oxidation removal activities of these photocatalysts were investigated under visible light irradiation and Bi0@Bi2WO6-x shows the best NO removal activity than other samples. The photogenerated charge separation and transfer are promoted by Bi0 nanoparticles deposited on the surface of semiconductor catalysts. OVs defects promote the activation of reactants (H2O and O2), thereby enhancing the formation of the active substance. Moreover, both OVs defects and Bi0 metal have the characteristics of extending light absorption and enhancing the efficient utilization of solar energy. Besides, the photocatalytic NO oxidation mechanism of Bi0@Bi2WO6-x was investigated by in situ FTIR spectroscopy for reaction intermediates and final products. This work furnishes insight into the synthesis strategy and the underlying photocatalytic mechanism of the surface-modified Bi0@Bi2WO6-x composite for pollutants removal.

Ultrasound-assisted construction of a Z-scheme heterojunction with g-C3N4 nanosheets and flower-like Bi2WO6 microspheres and the photocatalytic activity in the coupling reaction between alcohols and amines under visible light irradiation

Flower-like Bi2WO6 microspheres and bulk g-C3N4 were prepared by the hydrothermal method and high-temperature calcining method, respectively. A new method based on the combination of ultrasonic stripping and mechanical stirring was used to obtain uniform composite x-Bi2WO6/g-C3N4 (x is the Bi2WO6 mass ratio) photocatalysts with a Z-scheme heterojunction. In the reaction of benzyl alcohol and aniline to form imine, the optimal composite, 30%-Bi2WO6/g-C3N4, showed a conversion rate of 87.6%, which is much higher than that of pure Bi2WO6 and g-C3N4. Characterization by SEM and TEM showed that the ultrasonically stripped g-C3N4 significantly reduced the radial dimension compared to bulk g-C3N4. A uniformly dispersed photocatalytic material was formed, and it maintained a flower-like microsphere structure. Materials characterized by N2 adsorption–desorption isotherms (BET) showed that the specific surface area of the g-C3N4 nanosheets increased by approximately ten times after ultrasonic stripping. The photostability of the composite was verified by cyclic experiments. Under visible light irradiation, the activation energy of the coupling reaction between benzyl alcohol and aniline was found to be decreased by 29.8 kJ mol−1. A capture experiment was used to verify the active species in the photocatalytic system, with the reaction found to be mainly completed through the synergistic action of h+, e− and •O2−.

A facile preparation strategy for Bi2O4/Bi2WO6 heterojunction with excellent visible light photocatalytic activity

In this work, we provide a facile method to synthesize Bi2O4/Bi2WO6 heterojunction by a two-step hydrothermal. Bi2O4 micro-rods are in-situ generated on the surface of Bi2WO6 microspheres. Compared to pure Bi2WO6, the photocatalytic activity for the Bi2O4/Bi2WO6 heterojunction was enhanced 5 folds in degradation of Rhodamine B. In the degradation of Methyl Orange, the enhanced factor could reach to 90 folds under visible light. The superior activity could be attributed to the rapid separation and transfer of photogenerated charge carries, which could be proved by photocurrent test and electrochemical impedance spectroscopy (EIS). Moreover, the active material trapping experiments proved that ·O2− and h+ are the main active species in the degradation process. The present work provides a new sight for the fabricating of visible light-driven photocatalyst with high efficiency.

A spherical TiO2-Bi2WO6 composite photocatalyst for visible-light photocatalytic degradation of ethylene

In this paper, Bi2WO6 porous microspheres were prepared via a hydrothermal method and nano-TiO2 uniformly dotted on the surface of the Bi2WO6 microspheres using deposition technology to self-assemble a porous layer spherical TiO2-Bi2WO6 (TB) composite photocatalyst. The photocatalytic activity of the composite photocatalyst was evaluated using ethylene as the target degradation product. The results show that the photocatalytic degradation of ethylene by the TB composite photocatalyst was significantly improved, especially 10 % TB. Samples containing 10 % titanium dioxide had the highest photocatalytic activity for ethylene degradation. In addition, the degradation rate of ethylene was as high as 20.90 %, which was 1.53 times higher than that of Bi2WO6 microspheres. The spherical structure of the porous layer gives the composite photocatalyst a high specific surface area, which can effectively promote the rapid migration of photogenerated carriers between TiO2 and Bi2WO6, and prevent the recombination of photogenerated electrons and photogenerated holes, thereby effectively improving the photocatalytic performance.

Construction of NH2-MIL-125(Ti) nanoplates modified Bi2WO6 microspheres with boosted visible-light photocatalytic activity

Photoactive metal–organic frameworks (MOFs) have proven to be a promising porous material in the field of catalysis. Controllable integration of these MOFs with inorganic semiconductor materials may endow new multifunctional hybrid materials with preferable photocatalytic properties. In this research, NH2-MIL-125(Ti) nanoplates modified Bi2WO6 microspheres was prepared via a simple solvothermal method. The photocatalytic behaviors of the acquired catalysts was evaluated via the degradation of tetracycline hydrochloride (TC) under visible light. The experimental results showed that NH2-MIL-125(Ti)/Bi2WO6 composites display higher photocatalytic activity than that of single Bi2WO6, and the ideal incorporation amount of NH2-MIL-125(Ti) was around 5 wt%. The steady state fluorescence spectrum, transient photocurrents and electrochemical impedance spectroscopy verified that the introduction of NH2-MIL-125(Ti) could accelerate the separation and transfer of photogenerated carriers and thus improve the photocatalytic activity of Bi2WO6. The photocatalytic mechanism was explored in detail. This work extends the knowledge of integrating MOFs with traditional photocatalysts to form new composite materials in the area of environmental purification.