Fabrication of ternary dual Z-Scheme AgI/ZnIn2S4/BiVO4 heterojunction photocatalyst with enhanced photocatalytic degradation of tetracycline under visible light

In this study, a novel ternary AgI/ZnIn₂S₄/BiVO₄(AZB) composite photocatalyst was successfully prepared by hydrothermal method and in-situ precipitation method. The as-synthesized samples were characterized by XRD, SEM, TEM, XPS and so on, and the photocatalytic activity was evaluated through photocatalytic degradation of tetracycline (TC) under visible light irradiation. When the molar ratio of Bi to Ag was 1:1, the degradation rate of TC can reach 91.44 % within 150 min. The AZB heterojunction demonstrated outstanding efficiency with the apparent reaction rate constants of 0.02118 min^?1 for TC removal, was 4.68, 3.27 and 3.27 times higher than that of pure BiVO₄, AgI and ZnIn₂S₄. Based on active species trapping experiments and ESR analysis, a dual Z-Scheme pathways among BiVO₄, AgI and ZnIn₂S₄ for effective separation of photogenerated charges was recommended. This work provided a promising insight for the design of ternary dual Z-scheme heterojunction with multilevel electron transfer to present greater photo-absorption, charge separation, and photodegradation for environmental decontamination.     

Dual II Heterojunctions Metallic Phase MoS2/ZnS/ZnO Ternary Composite with Superior Photocatalytic Performance for Removing Contaminants

Fabricating a high-performance photocatalyst to efficiently solve serious environmental problems is an urgent affair. Herein, a series of MoS₂/ZnO composites were successfully fabricated through a facile hydrothermal route using Na₂MoO₄, (NH₂)₂CS and urchin-like ZnO as precursors. According to the results of XRD and XPS, it was found that ZnS appeared in MoS₂/ZnO composite; meanwhile, the content was positively correlated with the weight of the precursor (NH₂)₂CS. It should be noted that the morphology and the metallic phase content of MoS₂ grown in situ on the surface of ZnO were affected by the molar ratio of Na₂MoO₄ and ZnO. Benefiting from the special dual II heterojunctions of MoS₂/ZnS/ZnO ternary composite, the material exhibited excellent charge separation and transfer performances. In the photocatalytic measurements, the MoS₂/ZnS/ZnO (Na₂MoO₄:ZnO 1:2 MZ2) composite not only exhibits excellent photocatalytic Cr^VI reduction activity of 42.3×10⁻³ min⁻¹, but also displays remarkable adsorption performance (nearly 32.1 %) for Cr₂ . In addition, the ternary composite shows dominant photocatalytic Cr^VI reduction activities compared to other photocatalysts. This work provides a high-efficient MoS₂/ZnS/ZnO ternary photocatalyst for environmental treatment.     

In Situ Synthesis of Cu3P/P-Doped g-C3N4 Tight 2D/2D Heterojunction Boosting Photocatalytic H2 Evolution†

Heterojunction design in a two-dimensional (2D) fashion has been deemed beneficial for improving the photocatalytic activity of g-C₃N₄ because of the promoted interfacial charge transfer, yet still facing challenges. Herein, we construct a novel 2D/2D Cu₃P nanosheet/P-doped g-C₃N₄ (PCN) nanosheet heterojunction photocatalyst (PCN/Cu₃P) through a simple in-situ phosphorization treatment of 2D/2D CuS/g-C₃N₄ composite for photocatalytic H₂ evolution. We demonstrate that the 2D lamellar structure of both CuS and g-C₃N₄ could be well reserved in the phosphorization process, while CuS and g-C₃N₄ in-situ transformed into Cu₃P and PCN, respectively, leading to the formation of PCN/Cu₃P tight 2D/2D heterojunction. Owing to the large contact area provided by intimate face-to-face 2D/2D structure, the PCN/Cu₃P photocatalyst exhibits significantly enhanced charge separation efficiency, thus achieving a boosted visible-light-driven photocatalytic behavior. The highest rate for H₂ evolution reaches 5.12 μmol·h^–1, nearly 24 times and 368 times higher than that of pristine PCN and g-C₃N₄, respectively. This work represents an excellent example in elaborately constructing g-C₃N₄-based 2D/2D heterostructure and could be extended to other photocatalyst/co-catalyst system.      

Enhanced photocatalytic degradation of sulfamethoxazole by stable hierarchical Fe2O3/Co3O4 heterojunction on nickel foam

A facile approach was successfully employed to prepare Fe₂O₃/Co₃O₄ nanosheet arrays on nickel foams (Fe₂O₃/Co₃O₄@NF), which owned such advantages as narrow band gap energies and high separation rate of photoexcited electron-hole pairs. The combination of Fe₂O₃ and Co₃O₄ dramatically enhanced the photocatalytic activity towards sulfamethoxazole (SMZ) degradation, with the highest catalytic efficiency of k = 0.0538 min⁻¹, which was much higher than that of Fe₂O₃@NF (0.0098 min⁻¹) and Co₃O₄@NF (0.0094 min⁻¹). The introduction of Ni foam could not only act as the support to anchor photocatalyst, but also work as the electron mediator to promote the transition of electron-hole pairs. Reactive species trapping experiments combined with electron paramagnetic resonance analysis confirmed ^•O₂⁻ was primarily responsible for SMZ degradation. Furthermore, Fe₂O₃/Co₃O₄@NF was effective and almost unaffected by inorganic cations and anions in aqueous solution. This study could provide a facile and promising path for the construction of self-supported metal oxide-based heterojunction with high efficiency and strong stability.     

Micelle‐Directing Synthesis of Ag‐Doped WO3 and MoO3 Composites for Photocatalytic Water Oxidation and Organic‐Dye Adsorption

In this paper, an Ag‐doped WO₃ (and MoO₃) composite has been prepared by following a simple micelle‐directed method and high‐temperature sintering route. The as‐prepared samples were characterized by X‐ray diffraction, inductively coupled plasma, transmission electron microscopy, X‐ray photoelectron spectroscopy, UV/Vis diffuse reflectance spectroscopy, Brunauer–Emmett–Teller, photoluminescence spectroscopy, and electrochemical impedance spectroscopy techniques. The photocatalytic experiments reveal that their oxygen‐production rates are up to 95.43 μmol (75.45 μmol) for Ag‐doped WO₃ (MoO₃), which is 9.5 (7.3) times higher than that of pure WO₃: 9.012 μmol (MoO₃: 9.00 μmol) under visible‐light illumination (λ ≥420 nm), respectively. The improvement of their photocatalytic activity is attributed to the enhancement of their visible‐light absorption and the separation efficiency of photogenerated carriers by Ag doping. Moreover, Ag‐doped WO₃ (MoO₃) also shows excellent adsorption of rhodamine B (RhB) and methylene blue (MB) in aqueous solution, with maximum adsorption capacities towards RhB and MB of 822 and 820 mg g⁻¹ for Ag‐doped WO₃, and 642 and 805 mg g⁻¹ for Ag‐doped MoO₃, respectively.     

AgI/h-MoO3异质结的构筑及其模拟燃油光催化氧化脱硫活性

利用沉积法获得了异质结AgI/h-MoO₃光催化剂,通过X射线衍射（XRD）、扫描电子显微镜（SEM）、光电子能谱（EDS）、X射线光电子能谱（XPS）、紫外-可见漫反射吸收光谱（UV-Vis-DRS）、光致发光（PL）、电化学阻抗（EIS）等方法对其物相组成、形貌、光吸收特性、光电化学性能等进行了表征。以噻吩的正辛烷溶液模拟催化裂化（FCC）汽油为探针考察了AgI/h-MoO₃光催化氧化脱硫活性,结果表明,AgI/h-MoO₃-18异质结在催化剂浓度为1.5 g·L^-1,可见光照射2 h后,光催化氧化脱硫活性达98%。利用XRD、XPS、UV-Vis-DRS揭示了AgI/h-MoO₃光照后生成少量的金属Ag,使其结构转变为Z型AgI/Ag/h-MoO₃,有利于光生电子（e^-）转移。利用活性物种捕获实验、循环实验研究了AgI/h-MoO₃光催化氧化脱硫机理及其稳定性,实验结果表明：AgI/h-MoO₃不仅具有较高的光催化氧化脱硫活性,而且还有良好的稳定性。     

AgI/h-MoO_3异质结的构筑及其模拟燃油光催化氧化脱硫活性

利用沉积法获得了异质结AgI/h-MoO_3光催化剂,通过X射线衍射(XRD)、扫描电子显微镜(SEM)、光电子能谱(EDS)、X射线光电子能谱(XPS)、紫外-可见漫反射吸收光谱(UV-Vis-DRS)、光致发光(PL)、电化学阻抗(EIS)等方法对其物相组成、形貌、光吸收特性、光电化学性能等进行了表征。以噻吩的正辛烷溶液模拟催化裂化(FCC)汽油为探针考察了AgI/h-MoO_3光催化氧化脱硫活性,结果表明,AgI/h-MoO_3-18异质结在催化剂浓度为1.5 g·L~(-1),可见光照射2 h后,光催化氧化脱硫活性达98%。利用XRD、XPS、UV-Vis-DRS揭示了AgI/h-MoO_3光照后生成少量的金属Ag,使其结构转变为Z型AgI/Ag/h-MoO_3,有利于光生电子(e~-)转移。利用活性物种捕获实验、循环实验研究了AgI/h-MoO_3光催化氧化脱硫机理及其稳定性,实验结果表明:AgI/h-MoO_3不仅具有较高的光催化氧化脱硫活性,而且还有良好的稳定性。     

Z‐Scheme 2D/2D Heterojunction of Black Phosphorus/Monolayer Bi2WO6 Nanosheets with Enhanced Photocatalytic Activities

Black phosphorus (BP), a star‐shaped two‐dimensional material, has attracted considerable attention owing to its unique chemical and physical properties. BP shows great potential in photocatalysis area because of its excellent optical properties; however, its applications in this field have been limited to date. Now, a Z‐scheme heterojunction of 2D/2D BP/monolayer Bi₂WO₆ (MBWO) is fabricated by a simple and effective method. The BP/MBWO heterojunction exhibits enhanced photocatalytic performance in photocatalytic water splitting to produce H₂ and NO removal to purify air; the highest H₂ evolution rate of BP/MBWO is 21042 μmol g^?1, is 9.15 times that of pristine MBWO and the NO removal ratio was as high as 67 %. A Z‐scheme photocatalytic mechanism is proposed based on monitoring of ^.O₂^?, ^.OH, NO₂, and NO₃^? species in the reaction. This work broadens applications of BP and highlights its promise in the treatment of environmental pollution and renewable energy issues.     

Enhanced Photocatalytic Performance of ZnO Nanorods Coupled by Two‐Dimensional α‐MoO3 Nanoflakes under UV and Visible Light Irradiation

We exploit the utilization of two‐dimensional (2D) molybdenum oxide nanoflakes as a co‐catalyst for ZnO nanorods (NRs) to enhance their photocatalytic performance. The 2D nanoflakes of orthorhombic α‐MoO₃ were synthesized through a sonication‐aided exfoliation technique. The 2D MoO₃ nanoflakes can be further converted to substoichiometric quasi‐metallic MoO_3?x by using UV irradiation. Subsequently, 1D–2D MoO₃/ZnO NR and MoO_3?x/ZnO NR composite photocatalysts have been successfully synthesized. The photocatalytic performances of the novel nanosystems in the decomposition of methylene blue are studied by using UV‐ and visible‐illumination setup. The incorporated 2D nanoflakes show a positive influence on the photocatalytic activity of the ZnO. The obtained rate constant values follow the order of pristine ZnO NR<MoO₃/ZnO NR<MoO_3?x/ZnO NR composites. The enhancement of the photocatalytic efficiency can be ascribed to a fast charge carrier separation and transport within the heterojunctions of the MoO₃/ZnO NRs. In particular, the best photocatalytic performance of the MoO_3?x/ZnO NR composite can be additionally attributed to a quasi‐metallic conductivity and substoichiometry‐induced mid‐gap states, which extend the light absorption range. A tentative photocatalytic degradation mechanism was proposed. The strategy presented in this work not only demonstrates that coupling with nanoscale molybdenum oxide nanoflakes is a promising approach to significantly enhance the photocatalytic activity of ZnO but also hints at new type of composite catalyst with extended applications in energy conversion and environmental purification.     

CdS Reinforced with CoSX/NiCo-LDH Core-shell Co-catalyst Demonstrate High Photocatalytic Hydrogen Evolution and Durability in Anhydrous Ethanol

At present, inefficient charge separation of single photocatalyst impedes the development of photocatalytic hydrogen evolution. In this work, the CoS_X/NiCo-LDH core-shell co-catalyst was cleverly designed, which exhibit high activity and high stability of hydrogen evolution in anhydrous ethanol system when coupled with CdS. Under visible light (λ≥420 nm) irradiation, the 3 %Co/NiCo/CdS composite photocatalyst exhibits a surprisingly high photocatalytic hydrogen evolution rate of 20.67 mmol g⁻¹ h⁻¹, which is 59 times than that of the original CdS. Continuous light for 20 h still showed good cycle stability. In addition, the 3 %Co/NiCo/CdS composite catalyst also shows good hydrogen evolution performance under the Na₂S/Na₂SO₃ and lactic acid system. The fluorescence (PL), ultraviolet-visible diffuse reflectance (UV-vis) and photoelectrochemical tests show that the coupling of CdS and CoS_X/NiCo-LDH not only accelerates the effective transfer of charges, but also greatly increases the absorption range of CdS to visible light. Therefore, the hydrogen evolution activity of the composite photocatalyst has been significantly improved. This work will provide new insights for the construction of new co-catalysts and the development of composite catalysts for hydrogen evolution in multiple systems.     

Boosting Charge Transport in a 2D/3D Perovskite Heterostructure by Selecting an Ordered 2D Perovskite as the Passivator

We demonstrate that an ordered 2D perovskite can significantly boost the photoelectric performance of 2D/3D perovskite heterostructures. Using selective fluorination of phenyl-ethyl ammonium (PEA) lead iodide to passivate 3D FA_0.8Cs_0.2PbI₃, we find that the 2D/3D perovskite heterostructures passivated by a higher ordered 2D perovskite have lower Urbach energy, yielding a remarkable increase in photoluminescence (PL) intensity, PL lifetime, charge-carrier mobilities (ϕμ), and carrier diffusion length (L_D) for a certain 2D perovskite content. High performance with an ultralong PL lifetime of ≈1.3 μs, high ϕμ of ≈18.56 cm² V⁻¹ s⁻¹, and long L_D of ≈7.85 μm is achieved in the 2D/3D films when passivated by 16.67 % para-fluoro-PEA₂PbI₄. This carrier diffusion length is comparable to that of some perovskite single crystals (>5 μm). These findings provide key missing information on how the organic cations of 2D perovskites influence the performance of 2D/3D perovskite heterostructures.     

Ce掺杂Bi2MoO6/TiO2纳米纤维异质结的制备及可见光催化性能

以静电纺丝技术制备的TiO₂纳米纤维为基质,通过溶剂热法制备了异质结型稀土Ce掺杂Bi₂MoO₆/TiO₂复合纳米纤维。利用X射线衍射（XRD）、扫描电子显微镜（SEM）、X射线光电子能谱（XPS）、透射电镜（TEM）、紫外-可见漫反射光谱（UV-Vis DRS）以及荧光光谱（PL）等分析测试手段对样品的物相、形貌和光学性能等进行表征。以罗丹明B为模拟有机污染物,研究了样品的可见光催化性能。结果表明：在稀土掺杂样品中,Ce离子进入Bi₂MoO₆晶格,部分取代Bi³⁺,导致晶胞膨胀,晶格畸变,形成缺陷;与TiO₂复合形成异质结,有利于光生电荷的产生、转移和有效分离,从而提高TiO₂纳米纤维的光催化活性。可见光照射180 min,罗丹明B的降解率达到95.1%。经5次循环光催化降解活性基本不变,样品具有良好的光催化稳定性。     

CeTiO4/g-C3N4复合材料的制备及其高效的光催化染料降解性能

采用简单固相法成功制备了CeTiO₄/g?C₃N₄?x(CTO/CN?x,x g为g?C₃N₄的添加量)复合材料,并通过X射线衍射(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)、X射线光电子能谱(XPS)、N₂吸附-脱附测试、紫外可见吸收光谱(UV?Vis)及电化学测试对材料进行表征。研究发现:CeTiO₄与g?C₃N₄层状纳米片紧密复合,并成功构建了界面异质结结构;形成CTO/CN?x复合相的光催化材料具有良好的可见光光响应性能,且光生空穴-电子对的分离和迁移率明显提高;通过太阳光模拟不同样品光催化降解有机污染物罗丹明B,降解140 min后复合材料CTO/CN?6表现出最高的光催化活性,反应速率常数为0.0202 min^-1。其活性增强的主要原因是异质结结构的构筑降低了CTO光生载流子的复合几率,提高了光生载流子的迁移速率。     

Ce掺杂Bi2MoO6/TiO2纳米纤维异质结的制备及可见光催化性能

以静电纺丝技术制备的TiO_2纳米纤维为基质,通过溶剂热法制备了异质结型稀土Ce掺杂Bi_2MoO_6/TiO_2复合纳米纤维。利用X射线衍射(XRD)、扫描电子显微镜(SEM)、X射线光电子能谱(XPS)、透射电镜(TEM)、紫外-可见漫反射光谱(UV-Vis DRS)以及荧光光谱(PL)等分析测试手段对样品的物相、形貌和光学性能等进行表征。以罗丹明B为模拟有机污染物,研究了样品的可见光催化性能。结果表明:在稀土掺杂样品中,Ce离子进入Bi_2MoO_6晶格,部分取代Bi3+,导致晶胞膨胀,晶格畸变,形成缺陷;与TiO_2复合形成异质结,有利于光生电荷的产生、转移和有效分离,从而提高TiO_2纳米纤维的光催化活性。可见光照射180 min,罗丹明B的降解率达到95.1%。经5次循环光催化降解活性基本不变,样品具有良好的光催化稳定性。     

Visible light-driven BiOI/ZIF-8 heterostructure and photocatalytic adsorption synergistic degradation of BPA

A novel binary photocatalytic composite (BiOI/ZIF-8) was successfully constructed by solvothermal method. Its crystal morphology, chemical state of the elements and electrochemical properties were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, transmission electron microscopy, scanning electron microscopy, X-ray photoelectron spectroscopy and photoluminescence analysis. Appropriate ZIF-8 doping enhanced the separation and utilization of photogenerated electrons, promoted the capture of contaminants and rapidly produces active species, thereby accelerating the photocatalytic degradation of contaminants. Degradation experiments on BPA showed that the photocatalytic property of BiOI/ZIF-8 (0.5) was significantly improved compared with the parent material. BiOI/ZIF-8 (0.5) showed the highest reaction rate constant (0.06061 min^?1), 9.2 times that of BiOI (0.00659 min^?1) and 23.3 times that of ZIF-8 (0.0026 min^?1). In addition, five cycle tests showed that BiOI/ZIF-8 was highly efficient in recycling and stability. Through capture experiments, superoxide free radicals ·OH, h^? and ·O₂^? play an important role in degrading BPA, among which superoxide free radicals h⁺ play a major role.

     

Graphene Oxide-Assisted Covalent Triazine Framework for Boosting Photocatalytic H2 Evolution

Covalent triazine frameworks (CTFs) with two-dimensional structures have exhibited promising visible-light-induced H₂ evolution performance. However, it is still a challenge to improve their activity. Herein, we report π-conjugation-linked CTF-1/GO for boosting photocatalytic H₂ evolution. The CTF-1/GO hybrid material was obtained by a facile low-temperature condensation of 1,4-dicyanobenzene in the presence of GO. The results of photocatalytic H₂ evolution indicate that the optimum hybrid, CTF-1/GO-3.0, exhibited an H₂ evolution rate of 2262.4 μmol ⋅ g⁻¹ ⋅ h⁻¹ under visible light irradiation, which was 9 times that of pure CTF-1. The enhanced photocatalytic performance could be attributed to the fact that GO in CTF-1/GO hybrids not only acts as an electron collector and transporter like a “bridge” to facilitate the separation and transfer of photogenerated charges but also shortens the electron migration path due to its thin sheet layer uniformly distribution over CTF-1. This work could help future development of novel conjugated CTF-based composite materials as high-efficiency photocatalyst for photocatalysis.     

2D/2D atomic double-layer WS2/Nb2O5 shell/core nanosheets with ultrafast interfacial charge transfer for boosting photocatalytic H2 evolution

Low-efficiency charge transfer is a critical factor to limit the photocatalytic H₂ evolution activity of semiconductor photocatalysts. The interface design is a promising approach to achieve high charge-transfer efficiency for photocatalysts. Herein, a new 2D/2D atomic double-layer WS₂/Nb₂O₅ shell/core photocatalyst (DLWS/Nb₂O₅) is designed. The atom-resolved HAADF-STEM results unravel the presence of an unusual 2D/2D shell/core interface in DLWS/Nb₂O₅. Taking advantage of the advanced femtosecond-resolved ultrafast TAS spectra, the average lifetime of charge carriers for DLWS/Nb₂O₅ (180.97 ps) is considerably shortened as compared to that of Nb₂O₅ (230.50 ps), strongly indicating that the 2D/2D shell/core interface enables DLWS/Nb₂O₅ to achieve ultrafast charge transfer from Nb₂O₅ to atomic double-layer WS₂, thus yielding a high photocatalytic H₂ evolution rate of 237.6 μmol/h, up to 10.8 times higher than that of pure Nb₂O₅ nanosheet. This study will open a new window for the development of high-efficient photocatalytic systems through the interface design.     

Z型异质结Cu2O/Bi2MoO6的构建及光催化降解性能

通过水热法制备出一系列Z型异质结Cu₂O/Bi₂MoO₆新型光催化剂。采用扫描电子显微镜、粉末X射线衍射、红外光谱、紫外可见吸收光谱等表征手段研究了催化剂的形貌、结构性质和光电化学性质,并以四环素(TC)为降解目标污染物,进一步探究了其催化效率。实验结果表明,Cu₂O的加入提高了复合催化剂的光催化性能,其中20% Cu₂O/Bi₂MoO₆复合催化剂(Cu₂O和Bi₂MoO₆的质量比为20%)降解效果最好,100 min内可降解95%的TC。Cu₂O与Bi₂MoO₆之间的协同作用使其可以吸收更多的可见光,所构建的Z型异质结改变了电子转移途径,提高了电子与空穴的分离效率,光催化活性显著提高。通过自由基捕获实验和能带结构,分析了Z型异质结Cu₂O/Bi₂MoO₆复合催化剂光催化降解TC可能的机理。     

Environmental remediation by an integrated microwave/UV illumination technique: VI. A simple modified domestic microwave oven integrating an electrodeless UV-Vis lamp to photodegrade environmental pollutants in aqueous media

A simple device is described based on a modified domestic microwave oven that incorporates an UV-Vis lamp encased in Teflon to photodegrade environmental pollutants in aqueous media. The performance of this device was examined using the photodegradation of the agrochemical pollutant 2,4-dichlorophenoxyacetic acid (2,4-D) as the test process driven by a coupled photocatalytic/microwave method in an aqueous TiO₂ dispersion. The aqueous dispersion was contained in a high-pressure Teflon batch (TB) reactor that also integrated a double glass cylindrical plasma lamp (DGCPL) as the source of the UV-Vis radiation. This DGCPL lamp contained mercury gas with a minute amount of neon gas and was powered solely by microwave radiation. The coupled microwave-UV-Vis irradiation of the TB-DGCPL reactor led to an enhancement of the decomposition of the 2,4-D target substrate in the modified microwave oven relative to the photocatalytic method alone. Specifically, the rates of degradation were 2×10⁻³ mM min⁻¹ (photocatalytic/microwave method (PD/MW)) and 1.1×10⁻³ mM min⁻¹ (photocatalytic method (PD)) even though the light irradiance was some six-fold greater in the latter method. That is, the coupled PD/MW method was about 10 times more efficient than the PD method alone.     

Effcient Removal Phenol Red over Ternary Heterostructured Ag-Bi2MoO6/BiPO4 Composite Photocatalyst

The fabrication of multicomponent composite systems may provide bene ts in terms of charge separation and the retardation of charge pair recombination. In this work, a ternary heterostructured Ag-Bi₂MoO₆/BiPO₄ composite was fabricated through a low-temperature solution-phase route for the rst time. The XRD, SEM, EDX and XPS results indicated the prepared sample is a three-phase composite of BiPO₄, Bi₂MoO₆, and Ag. Ag nanopar-ticles were photodeposited on the surface of Bi₂MoO₆/BiPO₄ nanosheets, which not only increase visible-light absorption via the surface plasmon resonance, but also serve as good electron acceptor for facilitating quick photoexcited electron transfer. The interface between Bi₂MoO₆ and BiPO₄ facilitates the migration of photoinduced electrons from Bi₂MoO₆ to BiPO₄, which is also conductive to reduce the recombination of electron-holes. Thus, the ternary heterostructured Ag-Bi₂MoO₆/BiPO₄ composite showed signi cant photocatalytic activity, higher than pure Bi₂MoO₆, BiPO₄, and Bi₂MoO₆/BiPO₄. Moreover, the possible photocatalytic mechanism of the Ag-Bi₂MoO₆/BiPO₄ heterostructure related to the band positions of the semiconductors was also discussed. In addition, the quenching effects of di erent scavengers revealed that the reactive ·OH and O₂^·- play a major role in the phenol red decolorization.