Transport Of Photogenerated Electrons Research Articles

Electronic metal-support interaction via defective-induced platinum modified BiOBr for photocatalytic N2 fixation

Designing atomic-scale catalytic sites to facilitate N2 adsorption and transport of photogenerated electrons to the target active sites offers new opportunities to achieve highly-efficiently photocatalytic N2 reduction reactions. Herein, Pt was photodeposited on BiOBr along with formation of oxygen vacancies (OVs) under ultraviolet light. The modulation of chemical states of Pt and the formation of electron metal-support interactions (EMSI) between BOB and Pt facilitated the charge transfer between the modifiers (i.e. Pt and OVs) and the support (i.e. BiOBr). The production rate of ammonia on Pt and OVs co-modified BiOBr reached 23.8 μmol g−1 h−1, which was much higher than that either on OVs-BiOBr or pristine BiOBr. Density functional theory (DFT) calculations showed that EMSI effect led to a significant charge redistribution between Pt and BOBr carriers, whereby Pt doping could significantly reduce energy barrier of N2 hydrogenation process to facilitate photocatalytic N2 reduction.

Ultrahigh Detectivity Broad Spectrum UV Photodetector with Rapid Response Speed Based on p-β Ga2 O3 /n-GaN Heterojunction Fabricated by a Reversed Substitution Doping Method.

An excellent broad-spectrum (220-380nm) UV photodetector, covering the UVA-UVC wavelength range, with an ultrahigh detectivity of ≈1015 cm Hz1/2 W-1 , is reported. It is based on a p-β Ga2 O3 /n-GaN heterojunction, in which p-β Ga2 O3 is synthesized by thermal oxidation of GaN and a heterostructure is constructed with the bottom n-GaN. XRD shows the oxide layer is (-201) preferred oriented β-phase Ga2 O3 films. SIMS and XPS indicate that the residual N atoms as dopants remain in β Ga2 O3 . XPS also demonstrates that the Fermi level is 0.2eV lower than the central level of the band gap, indicating that the dominant carriers are holes and the β Ga2 O3 is p-type conductive. Under a bias of -5V, the photoresponsivity is 56 and 22 A W-1 for 255 and 360nm, respectively. Correspondingly, the detectivities reach an ultrahigh value of 2.7 × 1015 cm Hz1/2 W-1 (255nm) and 1.1 × 1015 cm Hz1/2 W-1 (360nm). The high performance of this UV photodetector is attributed mainly to the continuous conduction band of the p-β Ga2 O3 /n-GaN heterojunction without a potential energy barrier, which is more helpful for photogenerated electron transport from the space charge region to the n-type GaN layer.

Co-P bond effect on an MOF-derived Co9S8 hollow polyhedron supported Ni2P co-catalyst for efficient photocatalytic hydrogen evolution.

The development of new, efficient noble-metal-free photocatalysts is of great significance for the photocatalytic hydrogen evolution reaction. Herein, Co9S8 with a hollow polyhedral structure was synthesized by in situ sulfurization of ZIF-67, and subsequently, Co9S8@Ni2P composite photocatalytic materials were prepared by loading Ni2P on the surface of Co9S8 through a solvothermal method based on a morphology regulation strategy. The design of the 3D@0D spatial structure of Co9S8@Ni2P is favorable for the formation of photocatalytic hydrogen evolution active sites. Due to the excellent metal conductivity of Ni2P, Ni2P as a cocatalyst can accelerate the separation of photogenerated electrons from holes in Co9S8, thus providing a large number of available photogenerated electrons for photocatalytic reactions. It is worth mentioning that a Co-P chemical bond is formed between Co9S8 and Ni2P, which plays an active role in the transport of photogenerated electrons. The densities of states of Co9S8 and Ni2P were determined by density functional theory (DFT) calculations. The reduction of the hydrogen evolution overpotential and the formation of efficient charge-carrier transport channels on Co9S8@Ni2P were confirmed by a series of electrochemical and fluorescence tests. This study provides a new idea for the design of highly active noble-metal-free materials for the photocatalytic hydrogen evolution reaction.

Photocatalyst: To Be Dispersed or To Be Immobilized? The Crucial Role of Electron Transport in Photocatalytic Fixed Bed Reaction.

Photocatalytic fixed bed reactors allow a straightforward separation from the process stream and simplify the installation and operation in practical application. However, it is widely believed that the restriction on mass transport and volume activation severely slows the reaction. Here, we demonstrate that photocatalytic fixed bed reactors can deliver a superior reaction rate to the slurry suspension by rationally modulating the electronic process and the most concerning issue of mass transport occurring on a decisecond time scale does not retard the reaction. Although the long-distance transport of photogenerated electrons in porous semiconductor films toward catalytic sites encounters boundary scattering, this electronic process can be far faster than semiconductor-cocatalyst interfacial electron transfer occurring on the decisecond-second time scale. Besides, the fixed bed reaction can be freely amplified without losing photon utilization. Under irradiation provided by a 320 W Hg lamp, we realize a reaction rate of 0.262 mol/h with 65.2% quantum yield for anaerobic dehydrogenation of ethanol.

Deoxidation regulation of SiC surface and its effect on enhancing photocatalytic performance

In this study, the surface of SiC was deoxidized by a simple NaOH etching treatment at room temperature. The synthesized SiC catalysts were tested for the removal of MB dyes under UV irradiation. Strong alkali corrosion thinned the thickness of the blocking silicon oxide layer and also led to the presence of more electrophilic centers (consisting of polar > CO groups) on the surface. Compared with unetched SiC, the optimal photocatalytic efficiency of EC1T10-SiC was 43.11 % higher than the photocatalytic efficiency of EC0T10-SiC after UV irradiation for 75 min. Quenching experiments show that superoxide radicals (O2−) are the main reactive species in this process. A possible enhanced mechanism was proposed based upon oxidation layer thinning that favors photogenerated electron transport and polar centers (>Cδ+=Oδ-) favorable for photogenic electron migration. This study presents a simple method for controlling the surface structure of silicon carbide to achieve excellent photocatalytic performance. This method is environmentally friendly, easy to implement, and suitable for practical applications.

Fabrication of flower-like WO3/ZnIn2S4 composite with special electronic transmission channels to improve carrier separation for photoinduced cathodic protection and electron storage

In this paper, the WO3/ZnIn2S4 composite with special morphology of flower-like structures was prepared by hydrothermal method and its performance of photoinduced cathodic protection (CP) and continuous CP in the dark was studied. The construction of the WO3/ZnIn2S4 composite with special morphology is based on the following considerations. Firstly, the stacking connections of the nanoflakes of flower-like structured WO3 and ZnIn2S4 forms two-dimensional electron transport channels, which is beneficial to the directional transport of photogenerated electrons; Secondly, the heterojunction electric field formed at the WO3/ZnIn2S4 interface can accelerate the separation of photogenerated carriers; Finally, taking advantage of electron storage properties of WO3 and good photoinduced CP performance of ZnIn2S4 with a relatively negative conduction band potential, the WO3/ZnIn2S4 composite with excellent performance of photoinduced CP and continuous CP in the dark is obtained. The WO3/ZnIn2S4 system can negatively shift the potential of 304 SS by 332.8 mV, and can store 0.17 C of electricity when light illumination duration is 2 h, which is enough to provide 11.88 h continuous CP for 304 SS in dark state. This study realizes long-term CP in the dark, and provides the possibility for practical application of the photoinduced CP technology.

Photocatalytic destruction of stearic acid by TiO2 films: Evidence of highly efficient transport of photogenerated electrons and holes

The oxidation of stearic acid (SA) by ambient air, photocatalysed by a TiO2 film, a common test for self-cleaning glass, often exhibits a rate of stearic acid removal, rSA, which is proportional to the fraction of UV light absorbed, which suggests that the transport of both photogenerated electrons and holes from the bulk to the surface is very efficient. This electron, hole transport (EHT) model is tested to the extreme using highly absorbing, absorbance ≫ 2, mesoporous (sol-gel) and microporous (P25) TiO2 films, ca. 0.5–1 μm thick, coated with a layer of SA. Scanning electron micrographs of these films show them to comprise closely connected clusters, which themselves comprise a network of primary photocatalytic particles. Each film produced identical [SA] vs irradiation time decay profiles when irradiated from the front or the back, even though in the latter case the UV irradiance reaching the photocatalyst particles in contact with the SA layer is at least 1000 times lower than the incident irradiance. These results suggest the transport of the photogenerated holes, and most likely electrons too, in these films is very efficient. When the SA layer is replaced with an Ag photocatalyst indicator ink, Ag paii, on a P25 TiO2 film, and irradiated from the back, the ink changes colour quickly due to the reduction of Ag+ in the ink, indicating that the transport of photogenerated electrons through the film is also efficient. The same effect is demonstrated using highly absorbing, and scattering, films of rutile TiO2, ZnO and WO3, thereby suggesting the EHT model is a general feature of networked nanoparticle films. The limitations of the EHT model, and how it differs from the commonly cited antenna model, are discussed along with the relevance of these findings with regard to self-cleaning glass.

Critical roles of H2O and O2 in H2O2 photoproduction over biomass derived metal-free catalyst

In this paper, in-situ transient photoinduced-voltage combined with the continuous wavelet transform was used for the first time to study the critical roles of H2O and O2 in the H2O2 photoproduction. A metal-free photocatalyst containing carbon dots was synthesized by a one-step hydrothermal method using hesperidin as raw material. The photocatalytic H2O2 yield of the catalyst can reach 4480 μmol·L−1 under visible light without sacrificial agent. In addition to being raw materials, we have proved that H2O and O2 can regulate the photogenerated electron transport kinetics, namely, O2 can decelerate low-frequency electron transport, while H2O can accelerate the low-frequency electron transport. This work provides an in-depth understanding on photocatalytic production of H2O2 over composite metal-free photocatalysts and new insight for their design.

Synthesis of Ag@AgCl/CA and Visible-Light Photocatalytic Degradation of Oxtetracycline.

Chemical coupling, in-situ deposition of supported AgCl, and photoreduction were used to create Ag@AgCl/CA. The morphology, structure, and surface area of the prepared Ag@AgCl/CA were characterized by SEM, TEM, FT-IR, and BET. The photogenerated electron transport efficiency and visible light absorption were analyzed by photocurrent and electrochemical impedance spectroscopy (EIS), respectively. The surface electrical properties and degradation stability were evaluated by zeta potential measurement and cyclic catalytic degradation experiments, and the photocatalytic mechanism was proposed in detail based on the ESR test and trapping experiment. The results showed that the cluster of Ag@AgCl nanoparticles were distributed on the CA crosslinking structure. The prepared Ag@ AgCl/CA photocatalytic material has a high Zeta potential, stable photocurrent, and small photogenerated electron transfer resistance. It has good adsorption and photocatalytic degradation stability for OTC. The material has a relatively strong absorption in the visible light range. Temperature and initial pH had significant effects on the degradation of OTC by photocatalytic materials. The photocatalytic degradation rate was the highest at 40°C and pH6, and the photocatalytic degradation process conformed to the quasi-first-order reaction kinetics. Holes (h+) and superoxide radicals (·O2－) were the main active species for the degradation of OTC.

Fabrication of MoS2/CdIn2S4 Z-scheme heterojunctions with fast interface electronic transfer for highly efficient photocatalytic degradations of multiple organic pollutants

In this work, a novel Z-scheme MoS2/CdIn2S4 (MS-CIS) face-to-face heterostructure with excellent photocatalytic activities for multiple organic pollutant degradation was designed and constructed by a green mild in-situ hydrothermal method, where CdIn2S4 nano-octahedra coated on the surfaces of ultra-thin MoS2 nanosheets to form a face-to-face interface contact. The photocatalytic performance was systematically evaluated by the degradation of Oxytetracycline (OTC) under simulated visible light condition. Compared to MoS2 and CdIn2S4, the as-obtained MS-CIS-3 sample showed significantly improved photocatalytic activities toward OTC degradation, and the rate constant of MS-CIS-3 was 1.29959 h−1, which was 2.31 and 34.16 times those of CdIn2S4 (0.56303 h−1) and MoS2 (0.03804 h−1). The reason for the improvement in photocatalytic performance was that the MS-CIS heterostructure possessed a larger face-to-face contact area which could provide more charge transfer nanochannels, effectively shorten the photogenerated electron transport path and increase the electron-hole separation efficiency. In addition, the possible reaction routes of OTC and the photocatalytic reaction mechanism of MS-CIS sample were also discussed in detail. Furthermore, the MS-CIS-3 heterostructure with excellent photostability and repeatability also possessed outstanding degradation activities for both tetracycline hydrochloride (TCH) and 2-Mercaptobenzothiazole (MBT). This work may provide a promising strategy to synthesize other Z-scheme face-to-face heterostructure photocatalysts with highly efficient photocatalytic activity to solve environmental pollution.

Filterless ultra-narrow-band perovskite photodetectors with high external quantum efficiency based on the charge collection narrowing mechanism enabled by electron blocking/hole transport layer

Narrow-band perovskite photodetectors based on the charge collection narrowing (CCN) mechanism have developed rapidly owing to their narrow-band spectral response in the visible and near-infrared range. However, they face problems such as low external quantum efficiency (EQE) and an insufficiently narrow bandwidth. To solve these problems, a new method that uses the barrier effect between the electron blocking/hole transport layer and the perovskite absorption layer is proposed to realize the CCN mechanism. Based on this new method, a new narrow-band perovskite photodetector is designed. In the device, the electron blocking/hole transport layer plays the dual role of blocking the transport of photogenerated electrons in perovskite absorber layer-1 to the cathode and promoting the transport of photogenerated holes in perovskite absorber layer-2 to the anode. By changing the thickness of the perovskite absorber layer, an ultra-narrow-band perovskite photodetector with a full width at half maximum of 9 nm was finally realized. The simulation results showed that the peak EQE of the device with the optimal performance under zero bias was as high as 59.13%, and the spectral responsivity reached as high as 0.376 A W−1. Both of these metrics were higher than those of other existing narrow-band perovskite photodetectors based on the CCN mechanism.

First-principles studies of monolayers MoSi2N4 decorated with transition metal single-atom for visible light-driven high-efficient CO2 reduction by strain and electronic engineering

Solar-driven CO2 reduction into value-added hydrocarbons could promote CO2 utilization and solve related environmental issues, while the key lies in the modulation of the active site’s orbital electronic state. By performing first-principles calculations, we systematically explore MoSi2N4 decorated with 3d and 4d period transition metal single atoms (TMSAs) as efficient CO2 reduction photocatalysts and find that product selectivity is highly correlated with the d-band center of TMSAs. Compressive and tensile strains in mutually perpendicular directions are introduced in the horizontal plane to improve the catalytic performance. After filtering, V, Mn, and Ni were found to be the best TMSAs for CO, HCOOH, and CH4 production, respectively. Ni/MoSi2N4 under −6% tensile strain exhibited the lowest CO2 reduction limiting potential (UL) of 0.24 V. Notably, the time-dependent ab initio nonadiabatic molecular dynamics simulations were carried out to elucidate the photogenerated electron transport properties, where the photo-generated electrons can be efficiently transferred from MoSi2N4 to TMSAs active sites. We also identify that the applied strains affect the CO2 reduction performance by modulating the d-band center and valence electrons. These findings provide pioneering design schemes of precisely tailored photocatalytic systems for CO2 reduction under visible light.

Horizontal and vertical stacked Ag/MoS2 nanostructure enabled excellent carrier mobility and optoelectronic properties

Amongst 2D materials, MoS2 with highly exposed atomic edges and large specific surface area are considered potentially strong candidates for optoelectronic devices such as photogenerated electron transport layer, saturated/reverse saturated light absorber. With these prospects in mind, doped nanohybrid system was employed as a “accelerator” for problems related to conductivity and field emission. Herein, the horizontal-vertical stacked Ag/MoS2 films including horizontal nanolayer and vertical nanosheets (NSs) was firstly presented, which exhibit excellent carrier mobility and luminescence characteristics. We have confirmed that the morphology of the Ag/MoS2 NSs (including microworm-like, worm-like, and sheet-like shape), Ag content, micro strain and crystallinity can be adjusted under the different substrate temperature. Base on anisotropy bonding and ultrafast chemical conversion effect of MoS2, the cross-layer diffusion of sputtered atoms is suppressed, thereby the subsequent deposited atoms preferring to diffuse along the van der Waals gap. The efficient light-matter interaction and surface plasmon resonance (SPR) effect is introduced by the abundant exposed S-edges of horizontal-vertical stacked Ag-MoS2 nanostructure, which lead to excellent Raman signal and linear absorption characteristic. The carrier mobility and concentration of Ag/MoS2 NSs with excellent electrical behavior has reached 4480 cm2 V-1S-1 and 3.272 × 1018 cm−2, which can be regarded as the unique ohmic contact and the electron injection effect. Further, the luminescence performance (visible light region) of horizontal-vertical stacked Ag/MoS2-350 °C NSs is 2.5 times higher than that of the original MoS2 NSs, which is dominated by the hot electron injection effect. Importantly, the carrier relaxation time guided by the nonradiative recombination behavior of Ag/MoS2-350 °C NSs was not significantly changed by the incorporation of Ag nanoparticles. The above phenomenon implies that the hot electron injection effect mainly promotes the photoluminescence behavior induced by radiative recombination. The homogeneous and controllable Ag/MoS2 NSs exhibits excellent multiple optoelectronic properties, which can provide a valuable reference strategy for the application of optoelectronic nano-film materials.

Double is better: achieving an oxide solar-blind UV detector with ultrahigh detectivity and fast-refreshing capability

Oxygen vacancy (VO) defects are common in oxide semiconductors, which are generally believed to be double-edged in detectors. They contribute to a photo gain effect and consequently high responsivity. However, VO defects typically result in high dark current and long persistent photoconductivity (PPC), severely affecting the weak-light detecting and quick refreshing abilities. Here, a simple two-terminal architecture is constructed on amorphous Ga2O3 double layers. By adopting a periodic bias-switching working method, we found that the PPC is stably suppressed and a robustly high refresh rate is achieved, accompanied with the ultra-high photo-to-dark current ratio (>109), detectivity (8.7×1017 Jones) and UV-vis rejection ratio (>108). The combination of VO-gradient double-layer structure and new working method enables an unimpeded transportation of photo-generated electrons under light illumination and a swift block of the trap-released electrons in dark. The methodology may be hopefully extended to other oxide semiconductors for high-performance photodetection.

Efficient photocatalytic degradation of emerging ciprofloxacin under visible light irradiation using BiOBr/carbon quantum dot/saponite composite

The use of visible-driven photocatalysts has fascinated attention as a capable and sustainable approach for wastewater remediation. In this work, BiOBr/carbon quantum dot (CQDs)/saponite composites (CQDs/Clay@BiOBr) were fabricated via hydrothermally using two different CQDs/Clay precursors (in-situ synthesis (IS) and physical mixing (PM)). The obtained products were characterized, and the photocatalytic performances of the prepared samples were evaluated in the photocatalytic decomposition of emerging ciprofloxacin (CIP) pharmaceutical waste. The highest CIP mineralization performance was achieved when a combination of BiOBr and CQDs/Clay (IS) with the appropriate proportion because the strong adhesion between CQDs and clay generate a great heterojunction in the composite. The stronger interaction of CQDs and better distribution of CQDs on the surface of clay in the CQDs/Clay (IS) enhanced the interaction of BiOBr and CQDs, and avoided the re-agglomeration of excess of CQDs on surface of BiOBr which reduce the active surface to receive the light and react with CIP. The ultrafast degradation rate of the optimized CQDs/Clay@BiOBr composite was better compared to others. The significant improvement in the CIP degradation efficiency of the CQDs/Clay@BiOBr composite was attributed to the excellent separation and transportation of photogenerated electrons and holes, as confirmed by photoluminescence, photocurrent density, and electrochemical impedance spectroscopy results. Moreover, the photocatalytic degradation mechanism of CIP in the CQDs/Clay@BiOBr composite was proposed based on the electronic states of each material in the composite and on a scavenger test. Thus, the proposed CQDs/Clay@BiOBr composite can be employed as a potential visible-light-driven photocatalyst for the decomposition of organic contaminants in wastewater.

Slow Photon-Enhanced Heterojunction Accelerates Photocatalytic Hydrogen Evolution Reaction to Unprecedented Rates

Slow Photon-Enhanced Heterojunction Accelerates Photocatalytic Hydrogen Evolution Reaction to Unprecedented Rates

Fe–O–Zr in MOF for effective photo-Fenton Bisphenol A degradation: Boosting mechanism of electronic transmission

To enhance the efficiency of photogenerated electron transport in the photo-Fenton reaction, we report a Fe-doped UiO-66 containing Fe–O–Zr bonds for the photo-Fenton reaction system. The modulation changes the energy bandgap from 3.89 eV to 2.02 eV, and its absorption edge is red-shifted from the UV region to the visible range. Simultaneously, Fe–O–Zr reduces the redox internal resistance, enhances the photocurrent and catalytic process, and suppresses the compounding of photogenerated electrons and holes. These promote the valence cycling of Fe(III)/Fe(II) in the photo-Fenton reaction. Compared with UiO-66, the hydroxyl radical generation efficiency of this reaction system was increased by 5.8 times (UiO-66: 0.0009 mM/min, FeUiO-1: 0.0053 mM/min). The degradation efficiency of BPA was increased by 100.8 times (UiO-66: 0.0012 min−1, FeUiO-1: 0.121 min−1), and the removal rate of TOC also reached 69.55%. The removal rate of BPA was maintained at more than 85% through 5 cycles. The reaction system was able to maintain a removal rate more than 97% at pH:3–9. In the presence of anions, such as Cl−, SO42−, NO32− (10 mM), the degradation rates of BPA were still above 94%. The catalytic efficiency was 2.02 times higher under natural light than relative to dark conditions. It was demonstrated by EPR and inhibition experiments that the main active species in the reaction were hydroxyl radicals and vacancies. The HOMO energy level and LUMO energy level of the intermediates were analyzed, and the possible degradation pathways of the active species were speculated. Evaluation of the biological toxicity of intermediates demonstrated that the system can effectively detoxify BPA. This investigation provides a reference method to enhance the efficiency of the photo-Fenton reaction of MOFs.

MOF etching-induced Co-doped hollow carbon nitride catalyst for efficient removal of antibiotic contaminants by enhanced perxymonosulfate activation

The low surface area, low porosity, weak charge transport, and metal species loss of conventional metal-based carbon materials are the main defects limiting their environmental application. In this study, a metal–organic framework (MOF)-supported Co-doped hollow carbon nitride (ZCCN) catalyst was constructed by etching zeolitic imidazolate framework-67 (ZIF-67). Excellent visible light capture and electron transfer performance of the catalyst were revealed, and 99% tetracycline (TC) degradation and 65.9% peroxymonosulfate (PMS) decomposition were achieved within 40 min. Efficient separation and transport of photogenerated electrons are the key to PMS activation and TC degradation. Meanwhile, the preserved skeleton structure of ZIF-67 and the triazine rings of carbon nitride endowed the catalyst with enhanced stability and lessened Co leaching. Density functional theory (DFT) was applied to investigate the internal effect of PMS activation on Co sites. The reduced toxicity of the intermediates revealed the potential of the ZCCN/PMS system on eliminating environmental risks caused by TC. This study provides new insights into the design of stable MOF-derived metal-based heterogeneous catalysts.

Efficient and stable TiO2 nanorod array structured perovskite solar cells in air: Co-passivation and synergistic mechanism

In recent years, single crystal TiO2 nanorod arrays (TNRAs) with fewer grain boundaries for photo-generated electron transport and ordered channel structures for perovskite filling have been employed as electron transport layers for efficient perovskite solar cells (PSCs). However, further improvements in TNRA-based PSC performance are urgently needed because defects in the perovskite layer seriously hinder device efficiency and stability. In this study, with TNRAs as the electron transport layer, CH3NH3PbI3 (MAPbI3) perovskite films were prepared in air by a two-step spin coating method. The grain boundary defects and surface defects of the MAPbI3 layer are co-passivated by octyl ammonium iodide (CH3(CH2)7NH3I, OAI) and choline chloride (HOCH2CH2N(CH3)3Cl, Ch), respectively, and the effects of the two passive materials on the power conversion efficiency (PCE) and stability of TNRA-based PSCs are systematically investigated. The results reveal that the introduction of OAI facilitates the formation of intermolecular valence bonds between crystalline MAPbI3 to enhance its structural stability, while Ch passivates the Pb–I antisite substitution defect and I− vacancy defect on the perovskite film surface. Compared with the pristine device, the optimal PCE of the passivated device increases from 18.86% to 20.08%, and the thermal, humid and long-term stability of the device is also improved.

Preparation of a Bi12O15Cl6@W18O49@g-C3N4/PDI heterojunction with dual charge transfer paths and its photocatalytic performance for phenolic pollutants

A novel plasmonic Bi12O15Cl6@W18O49@g-C3N4/PDI photocatalyst with dual charge transfer paths was prepared via a solvothermal method using W18O49 nanowires grown on Bi12O15Cl6 nanosheets, followed by loading graphitic carbon nitride/ pyromellitic acid dianhydride (g-C3N4/PDI) onto the resulting Bi12O15Cl6@W18O49 via simple calcination. The heterojunction displayed outstanding photocatalytic performance in the degradation of bisphenol A (BPA) under simulated sunlight illumination, achieving an efficiency of 100% with respect to the removal of BPA (10 ppm) within 30 min. The results of five recycling experiments and an X-ray diffraction analysis before and after degradation showed that the photocatalyst had a relatively stable structure and properties. The investigation of the mechanism regarding the enhanced activity of the plasmonic photocatalyst revealed that dual charge transfer paths and the localized surface plasma resonance effect significantly improved the photogenerated electron transport efficiency and light absorption capacity of the Bi12O15Cl6@W18O49@g-C3N4/PDI composite, which can effectively activate molecular oxygen, producing superoxide radicals and hydroxyl radicals. This study provides a novel platform for the application of the localized surface plasmon resonance effect in photocatalysis via the development of a photocatalyst with dual charge transfer paths.