Localized Surface Plasmon Resonance Research Articles

Radiation‐Enhanced Heat Pipe Radiator via Surface‐Engineered Hierarchical Resin‐Free Coating for Effective Passive Heat Dissipation of High‐Power Electronic Modules

AbstractEffective heat dissipation is critical for high‐power modules amid increasing demands for compact, lightweight, and high‐performance electronic devices. This study presents a passive cooling strategy employing a type of hierarchical resin‐free coating (HRC) on the etched surfaces of a heat pipe radiator for cooling high‐power modules. The HRC consists of graphene‐hybridized hexagonal boron nitride (h‐BN) nanosheet networks fabricated via a scalable three‐step chemical etching on substrate, ball‐milling exfoliation, and silane coupling process. It achieves an infrared emissivity of 0.97, owing to strong phonon vibrations within 2D nanosheets and localized surface plasmon resonance from hierarchical micro/nanostructures which induce electromagnetic field polarization, as confirmed by numerical simulation. Heat dissipation performance of a heat pipe radiator coated with the HRC, as compared to the uncoated one, is apparently improved due to the enhanced radiative cooling. Experimental and numerical results demonstrate that the radiator with coatings, relative to the uncoated one, yields a 3.1–9.9 °C temperature reduction at air velocities of 1–5 m s−1 and a decrease of total thermal resistance by up to 16.7% under 1.5 kW heat load. This work provides a new design concept for environmentally friendly, highly efficient, and sustainable thermal management solutions in high‐power electronic modules.

Hollow silver nanoparticle formation under ultrafast laser irradiation via single- and multiple-shots.

The morphological changes induced in metal nanoparticles by the interaction with laser pulses have an important impact on their optical response. In this work, by means of an atomistic model, we have studied the formation of cavities in spherical silver nanoparticles embedded in amorphous silica using one or more femtosecond laser pulses. The model allows us to identify the different processes that lead to cavity formation and how they affect the variation of the aspect ratio, i.e., the relationship between the size of the cavity and that of the metallic sphere. The model is used to explain experiments revealing the conditions necessary to produce hollow metal nanoparticles. New information on hollow nanoparticle formation both in single shot and multiple shot regimes is reported. The atomistic model in combination with an optical model constitutes a tool to tune the properties of hollow nanoparticles, as shown in this paper. This way, we can achieve a fine control over the aspect ratio and, thus, about the localized surface plasmon resonance of the hollow nanoparticles.

First-principles study of electronic and optical response properties of bimetallic-sulphide heterostructure supported dithiocarbonate complex for organic solar cells

The use of molecular complexes in improving the transport properties of active layer materials for organic solar cells has been enormous in the recent era. The current study focuses on the transport and optical properties of dithiocarbonate-based complexes on Tin sulphide/Cobalt sulphide heterostructure. The charge transfer properties show electronegativity features for the N-butylamine complex, whereas electropositive transport features are observed for the N-dodecyl amine and mixed (N-butylamine/N-dodecylamine) complex blend. This charge transfer behaviour is consistent with typical acceptor–donor features, which are associated with metal-thiocarbamate complex transport. The optical features for dithiocarbonate-based complexes supported metal sulphide heterostructure show increased absorption and reflective plasmonic features in comparison with pristine metal sulphide heterostructure. The study proposes the incorporation of a dithiocarbonate complex as support for metal sulphide heterostructure active layer material that can be used to drive improved charge transport and localized surface plasmon resonance, which is crucial for charge transport in organic solar cell devices.

Thermosensitive Light-Driven Smart Platform Induces Apoptosis of Fibroblast-like Synovial Cells and Macrophages for Enhanced Rheumatoid Arthritis Therapy.

Macrophage activation induces rapid proliferation and division of fibroblast-like synovial cells (FLSs), resulting in the degradation of cartilage matrix and bone destruction, which are the main pathological characteristics of rheumatoid arthritis (RA). Inducing apoptosis in these inflammatory cells to mitigate the inflammatory response and alleviate bone damage is a potential therapeutic strategy for RA. In this study, we developed a smart platform for synergistic photothermal therapy (PTT) and chemotherapy by utilizing hyaluronic acid (HA)-modified thermally sensitive liposomes loaded with celastrol (CEL) and gold nanorods (GNRs), termed HA/Lipo-CEL-GNRs, for application in a rat RA model. Under laser irradiation, GNRs exhibited excellent photothermal effects due to localized surface plasmon resonance. The resulting increase in temperature not only effectively eliminated hyperproliferative inflammatory cells in the joints but also triggered CEL release from the thermosensitive liposomes, significantly increasing its concentration in the synovium. The synergistic effect of PTT and chemotherapy significantly promoted the apoptosis of FLSs and macrophages and effectively suppressed the inflammatory response in the RA microenvironment. In summary, multifunctional thermosensitive HA/Lipo-CEL-GNRs represent promising nanotherapeutic platforms capable of achieving light-driven enrichment of heat and therapeutic agents, significantly preventing the progression of RA.

Quantifying Localized Surface Plasmon Resonance Induced Enhancement on Metal@Cu2O Composites for Photoelectrochemical Water Splitting.

The localized surface plasmon resonance (LSPR) of metal nanoparticles can substantially enhance the activity of photoelectrocatalytic (PEC) reactions. However, quantifying the respective contributions of different LSPR mechanisms to the enhancement of PEC performance remains an urgent challenge. In this work, Cu@Cu2O composites prepared by annealing Cu2O under an inert atmosphere and electrodeposited metal@Cu2O composites (MED@Cu2O, MED = CuED, AuED, AgED, PdED, PtED) are employed as platform materials to investigate the LSPR effect on the PEC hydrogen evolution reaction (HER). All the composites exhibited remarkably LSPR-enhanced activity toward PEC HER. The contributions of two LSPR mechanisms, plasmon induced resonance energy transfer (PIRET) and hot electron transfer (HET), to the photocurrent on Cu@Cu2O and CuED@Cu2O are quantified by using different bands of incident light. Moreover, using MED@Cu2O composites, the effects of both the metal species and the applied potential on HET are quantitatively investigated. The results reveal that a pronounced HET enhancement occurs only when the LSPR peak energy is lower than the semiconductor bandgap energy (Eg) and that HET strengthens as the applied potential becomes more negative for PEC HER. This work therefore provides a quantitative understanding of the roles of PIRET and HET in boosting PEC activity.

Rapid and sensitive detection of malachite green by multifunctional octahedron UiO- 66-NH2/Fe3O4/Ag SERS substrate.

Multifunctional nanocomposites have attracted extensive attention in the design of new SERS substrates. In this work, a metal-organic framework (MOF) modified with Ag nanoparticles (Ag NPs) and cysteine functionalized Fe3O4 (UiO-66-NH2/Fe3O4/Ag) was prepared as a SERS substrate (UFAs). The substrate combines the enrichment ability of UiO-66-NH2, the magnetic separation ability of Fe3O4, and the localized surface plasmon resonance (LSPR) effect of Ag NPs to achieve efficient detection of the target analyte. The results of adsorption kinetics showed that the adsorption process of malachite green (MG) was mainly dominated by chemical adsorption. In addition, we further explored the detection mechanism of UFAs for MG. UFAs enriched cation analytes such as MG through π-π stacking and electrostatic interaction and performed SERS detection. The UFA SERS substrate exhibits good detection sensitivity for MG, with a limit of detection (LOD) of 1.35 × 10-10 M (at 1619 cm-1), and the SERS substrate has good uniformity and stability. The SERS substrate was applied to the detection of MG in aquaculture water. The recovery of MG in the sample was 91.2-105%, and the relative standard deviation (RSD) was 3.76-6.06%. This high-performance UFA SERS substrate also has great potential for the detection of food and other environmental pollutants in practical applications.

Ultrafast Laser-Induced 1T'/2H-MoTe2 Nanopattern with Au-Nanoclusters for Raman Monitoring of Cellular Drug Metabolism.

The development of surface-enhanced Raman spectroscopy (SERS) as an ultrasensitive fingerprint analysis technique in precision medicine requires high-performance SERS substrates with controllable nanostructure (hot-spot) distribution, simple fabrication, superior stability, biocompatibility, and extraordinary optical responses. Unfortunately, fabrication of arbitrary nanostructures with high homogeneity on a large scale for SERS is still challenging. Herein, we report an ultrafast laser parallel fabrication protocol for Au/2D-transition-metal dichalcogenide hybrid SERS biosensors. The leveraged photonic nanojets (PNJs) are generated by a micron-sized microsphere monolayer to simultaneously trigger localized phase transition in 2H-MoTe2, achieving a 1T'-MoTe2 nanopattern array with a density of 1 million per mm2 by a single laser shot. The Au nanoparticle clusters (AuNCs) are subsequently grown in situ from the 1T' regions, creating a AuNCs on 1T'/2H-MoTe2 (AuNCs@1T'/2H-MoTe2) hybrid SERS substrate. The fabricated feature diameter and overlay accuracy of the patterned AuNCs are 210.1 ± 3.4 and 9.2 ± 1.7 nm, respectively. To eliminate background noise, we designed dimer-AuNCs@1T'/2H-MoTe2 (dAuNCs@1T'/2H-MoTe2), achieving a detection limit of 10-13 M with an enhancement factor of 4.9 × 108 for the methylene blue (MB) analyte. The strong localized surface plasmon resonances in the dAuNCs as well as efficient charge transfers between Au, 2H-MoTe2, and MB contribute to the majority of Raman enhancement. The multiscale dAuNCs@1T'/2H-MoTe2 array provides a powerful SERSome (comprising multiple SERS spectra) platform for therapeutic drug monitoring, by which we successfully identified the metabolic behaviors of living gastric adenocarcinoma cells administered with two drugs, i.e., capecitabine, oxaliplatin, and their combination. The present work establishes opportunities for creating a highly ordered nanopattern array for ultrasensitive SERSome analysis of cell metabolism in cancer therapy.

Vibrational circular dichroism of plasmonic nanostructures embedding chiral drugs

We investigate the mid-infrared chiroptical response of plasmonic nanostructures based on Al-doped ZnO and layers of an aqueous solution of Ladarixin, a chiral pharmaceutical currently under clinical trial for the treatment of type 1 diabetes. We explore the possibilities offered by localised surface plasmon resonances (LSPRs) for the enhancement of vibrational circular dichroism (VCD) of the considered chiral drug solution. Focusing on diverse plasmonic nanoshell geometries, we find that LSPRs provide an amplification factor of VCD differential absorption cross-section ranging from to thanks to near-field intensity enhancement produced by LSPRs. Our results indicate that nanoshell LSPRs are promising for probing molecular chirality at the nanoscale.

Single-Crystal Diamond Nanowires Embedded with Platinum Nanoparticles for High-Temperature Solar-Blind Photodetector

Diamond, an ultrawide-bandgap semiconductor material, is promising for solar-blind ultraviolet photodetectors in extreme environments. However, when exposed to high-temperature conditions, diamond photodetector surfaces are unavoidably terminated with oxygen, leading to low photoresponsivity. To address this limitation, single-crystalline diamond nanowires (DNWs) embedded with platinum (Pt) nanoparticles were developed using Pt film deposition followed by chemical vapor deposition (CVD) homoepitaxial growth. During the CVD, Pt nanoparticles (approximately 20nm in diameter) undergo dewetting and become uniformly embedded within the single-crystalline DNWs. Photodetectors fabricated with these Ptnanoparticles-embedded DNWs achieve a responsivity of 68.5 A W-1 under 220nm illumination at room temperature, representing an improvement of approximately 2000 times compared to oxygen-terminated bulk diamond devices. Notably, the responsivity further increases with temperature, reaching an exceptional value of 3098.7 A W-1 at 275°C. This outstanding performance is attributed to the synergistic effects of the one-dimensional nanowire structure, deep-level defects, the localized surface plasmon resonance effects induced by embedded Pt nanoparticles, and localized Schottky junctions at the Pt/diamond interface, which enhance optical absorption, carrier generation, and separation efficiency. These results highlight the significant potential of Ptnanoparticles-embedded DNWs for advanced deep ultraviolet detection in harsh environments, including aerospace, industrial monitoring, and other applications.

Core-to-Shell Thickness-Regulated Ag@Au Nanocatalyst for LSPR-Improved In Situ Detection of Extracellular Peroxide: Response in a Cancer Cell.

In the current study, we designed a unique core-to-shell thickness-regulated Ag@Au nanocatalyst (CSNPs) for H2O2-induced selective oxidative etching of core silver. Synthesized CSNPs exhibit high colloidal stability and demonstrate a significant localized surface plasmon resonance (LSPR) effect in the biological window. These unique properties in turn allow us to formulate a unique CSNP-based LSPR-induced electrochemical detection assay for selective trace-level sensing of H2O2 in vitro. Conceptually, we utilized LSPR to amplify the electrochemical signals by inducing the generation of hot electrons and hot holes, which can be harnessed for catalytic purposes. Here, the Au shell acts as a supplier of the hot electron for enhanced catalytic reduction of H2O2 where the free electron of the Au shell is subsidized by the Ag core by its subsequent oxidation. The combination of high LSPR property, stability, and efficient binding property makes these NPs not only a surface-enhanced Raman scattering (SERS) enhancer but also a promising electrocatalyst for biomolecule detection, which emphasizes the significant potential of these engineered nanomaterials in various applications.

Tunable Plasmochromic Devices Using Gold Nanoislands Integrated with an Electropolymerized Organic Semiconductor.

The need for the reversible and on-demand reconfiguration of local surface plasmon resonances (LSPR) has driven the emerging field of active plasmonics. The overwhelming majority of electrochromic-polymer-mediated active plasmonic nanostructures consist of lithographically fabricated nanoarrays or colloidal nanoparticles embedded in conductive polymers, such as polyaniline (PANI). Herein, we introduce the semiconducting polymer poly(3-methylthiophene) (P3MT) as a novel tunable dielectric medium for active plasmon control. Likewise, we employ thermally dewetted gold nanoislands (AuNIs) as scalable, cost-effective, and robust plasmonic nanostructures. To date, active plasmonic devices based on P3MT or thermally dewetted nanostructures have yet to be explored. Active plasmonic devices consisting of AuNIs coated with ultrathin 12-15 nm P3MT shells were fabricated and tested. Modulation between reduced and oxidized P3MT resulted in a reversible average LSPR modulation of 22 nm, which compares to or even outperforms other electrochromic polymers at similar shell thicknesses. The plasmochromic performance of P3MT-coated Au nanoislands with various LSPRs and size distributions was evaluated in terms of modulation depth, response time, reversibility, chromaticity, and stability. Cyclic stability measurements reveal that plasmonic shifts can still be observed after 1000 cycles of repeated modulation. This work not only expands the current roster of tunable dielectric media and plasmonic nanostructures for use in active plasmonics but also lays the foundation for next-generation active plasmonic technologies such as tunable organic photovoltaics (OPVs), organic photodiodes (OPDs), and plasmonic field-effect transistors (FETs).

Influence of carrier localization on terahertz conductivity in Weyl semimetal Mn3Sn thin films

The topological semimetal Mn3Sn, known for its strong electronic correlation characteristics, is of significant importance for research into its optoelectronic properties within the terahertz (THz) frequency spectrum. Here, we systematically investigate THz response of nearly continuous and granular Mn3Sn by THz time-domain spectroscopy from 1.5 to 300 K. The results indicate that the THz response can be greatly modulated by the morphology of sample due to carrier localization. For nearly continuous samples, the transition from semiconductor to metal can be observed as the temperature increases, and the THz conductivity can be described by the Drude model within the range of 0.2–1 THz. For granular samples, the real part of the THz conductivity is an order of magnitude smaller than that of nearly continuous ones, and it exhibits temperature insensitivity and a negative imaginary part of THz conductivity. Moreover, we have observed two absorption peaks induced by localized surface plasmon resonance (LSPR) at ∼1.2 and ∼1.7 THz. The findings not only enhance our understanding of the photoelectric properties of Mn3Sn thin films but also pave the way for studying the THz conductivity of thin films.

Effects of Surface Plasmon and Catalytic Reactions on Capacitance in Metal-Semiconductor Schottky Diodes.

Capacitors, renowned for their high power and energy density attributed to their rapid discharge capabilities, hold significant promise as energy storage devices. While capacitors with various junctions have been the subject of extensive research, there remains a significant knowledge gap concerning the fundamental photoelectron dynamics within metal-semiconductor (MS) junction capacitance, which is crucial for the development of photodevices. Here, we demonstrate the effects of localized surface plasmon resonance (LSPR) on the capacitance behavior of Au/TiO2 Schottky diodes, one of the MS junction diode systems. We have confirmed that the plasmonic Au/TiO2 shows substantial photoresponsiveness, with an increase in net total capacitance under stronger plasmonic effects, as confirmed by wavelength- and power-dependent studies. To enhance our understanding of the electron transfer process occurring at the MS junction, we expand our investigation of capacitance within a catalytic reaction environment, specifically focusing on Pt/TiO2 Schottky diodes. We show the catalytic environment changes capacitance values of the Pt/TiO2, and more active catalytic reactions decrease net total capacitance due to catalytic electrons interfering with diffusion electrons. The LSPR effect and catalytic reaction significantly impact the net total capacitance with a predominant contribution associated with hot electrons, catalytic electrons, and diffusion effects. These findings provide valuable insights for designing and optimizing efficient optical and catalytic devices across diverse applications.

Nanoresonance Cavity and Localized Surface Plasmon Resonance Enhanced Broad-Spectral Photodetector for Versatile Applications.

To overcome the limitations inherent in traditional silicon (Si)-based photodetectors, particularly the low light absorption and complex carrier dynamics, this study proposes and fabricates in situ three-dimensional (3D) graphene/Si Schottky junctions integrated with WS2 quantum dots (QDs). The introduction of WS2 QDs enables the heterojunction to realize "double-enhanced absorption" by the synergistic effect of the natural nanoresonant cavity effect and the surface plasmon resonance effect (LSPR) of the WS2 QDs. Photodetectors constructed from the WS2 QDs/3D-graphene/Si heterojunction demonstrate a broadband, self-powered response from 440 to 1850 nm, maintaining stable operation at 1550 nm for 4 months. They exhibit high-frequency modulation (2 kHz), a responsivity of up to 83 A/W, a specific detectivity of 5.6 × 1011 Jones, rapid response/recovery times of 139 μs/145 μs with multifunctionality in image acquisition, information encryption, and logic operations. This research lays the foundation for high-performance, stable photodetectors and light-controlled logic circuits in communications and imaging.

Free carrier-enhanced Bi/Bi2S3 nanoparticles enable precise OCT catheter-guided interventional photothermal therapy for colorectal cancer.

Free carrier-enhanced Bi/Bi2S3 nanoparticles enable precise OCT catheter-guided interventional photothermal therapy for colorectal cancer.

Photothermal Effect of Carbon-Doped Carbon Nitride Synergized with Localized Surface Plasmon Resonance of Ag Nanoparticles for Efficient CO2 Photoreduction

Converting carbon dioxide (CO2) into high-value fuels through the photothermal effect offers an effective approach to enhancing the carbon cycle and reducing the greenhouse effect. In this study, we developed Ag/C-TCN-x, a carbon nitride-based photocatalyst that integrates both photothermal and localized surface plasmon resonance (LSPR) effects. This material was synthesized through a three-step process involving hydrothermal treatment, calcination, and photo-deposition. Real-time infrared thermography monitoring revealed that Ag/C-TCN-2 reached a surface stabilization temperature of approximately 176 °C, which was 1.5 times higher than C-TCN and 2.2 times higher than g-C3N4. Under the same experimental conditions, Ag/C-TCN demonstrated a carbon monoxide (CO) release rate 3.3 times greater than that of pure g-C3N4. The composite sample Ag/C-TCN-2 maintained good photocatalytic activity in five cycling tests. The structural stability of the sample after the cycling tests was confirmed by X-ray diffraction (XRD) test. The unique tubular structure of Ag/C-TCN increased its specific surface area, facilitating enhanced CO2 adsorption. Carbon doping not only triggered the photothermal effect but also accelerated the conversion of carriers. Additionally, the LSPR effect of Ag nanoparticles, combined with carbon doping, optimized charge carrier dynamics and promoted efficient CO2 photoreduction. The CO2 reduction mechanism over Ag/C-TCN was further examined using in situ Fourier Transform Infrared (FT-IR) spectroscopy. This research offers valuable insights into how photothermal and LSPR effects can be harnessed to enhance the efficiency of CO2 photoreduction.

Recent advances in gold nanoparticle-graphene hybrid nanoplatforms with visible to near-infrared response for photodynamic and photothermal therapy and bioimaging.

Photodynamic therapy (PDT) and photothermal therapy (PTT) are light-activated cancer treatments. PDT involves the administration of a photosensitizing agent, which is activated by light of a specific wavelength to generate reactive oxygen species. Alternatively, PTT involves the use of photothermal agents, which are materials that absorb light and convert it into heat. Gold nanoparticles are often used as photothermal agents owing to their localized surface plasmon resonance (LSPR), a key optical property, which allows them to efficiently absorb light and convert it into heat. Graphene, which is a 2D material with extraordinary optical and physical properties and a large surface area, shows great promise both in PDT and PTT as an intrinsic nanoheater or a versatile platform for the immobilization of gold nanoparticles and other functional molecules, including photosensitizers. Moreover, graphene-based derivatives, i.e. graphene oxide (GO) and reduced graphene oxide (rGO), exhibit intrinsic optical/spectroscopic signals, which can be used in fluorescence, Raman and thermal imaging. By combining gold nanoparticles with graphene derivatives, a higher increase in temperature can be achieved under light irradiation owing to the synergistic effect of these two materials and the drug delivery efficiency and multimodal imaging techniques can be enhanced. This review provides insights into graphene-based nanoplatforms, focusing on multimodal therapy and imaging techniques. Furthermore, future perspectives in the field of graphene-based- and hybrid-nanoplatforms are suggested.

Efficient hot carrier injection in plasmonic semiconductor heterojunction for artificial photosynthesis of ammonia

We developed a plasmonic semiconductor p-n junction byin situgrowing p-type Cu3BiS3in n-type Bi2S3nanorods by an ion exchange method. The formation of plasmonic semiconductor heterojunctions was verified through high-resolution transmission electron microscopy, Mott-Schottky tests, x-ray photoelectron spectroscopy-based valence band spectra, and powder x-ray diffraction. Additionally, the rapid transfer of hot carriers between the heterojunctions was investigated using ultrafast transient absorption spectroscopy (TAS). The plasmonic p-n junction shows strong localized surface plasmon resonance (LSPR) absorption in the near-infrared (IR) range and delivers a 61-fold enhancement of the ammonia production rate under full spectrum irradiation in pure water. It can achieve an apparent quantum efficiency of 0.45% at 400 nm and 0.16% at 1000 nm.In situFourier-transform IR reveals that the plasmonic semiconductor heterojunction promotes the nitrogen chemisorption and activation. Based on TAS measurements, we found that LSPR induced hot carriers can be efficiently injected from plasmonic Cu3BiS3to non-plasmonic Bi2S3, with sufficient energy to drive water oxidation reaction. We further confirmed that photothermal effects have negligible contribution to the photocatalytic performance in the water-particle suspension system. The present study shows a potential strategy utilizing plasmonic semiconductors made of earth-abundant elements for green ammonia synthesis.

Construction of Multistep Charge Transfer Pathways in Bi0@Bi3+‐KNbO3 for Significantly Accelerated Photoconversion of Waste Plastics

AbstractPhotoconversion of waste plastics into valuable CO and CH3COOH represents a ground‐breaking strategy for addressing plastic pollution issues. However, this process currently encounters significant challenges, primarily due to the limitation of catalyst activity and the difficulty in breaking C─C bonds. Herein, we present a novel approach that integrates multistep charge transfer pathways with photothermal‐driven reactions to improve photoconversion efficiency. By incorporating Bi0/Bi3+ metal as an electron transport mediator for multistep charge transfer, we markedly enhanced the separation and transport of photoelectrons, thereby accelerating the generation of active species. Meanwhile, the heat generated by the localized surface plasmon resonance effect of Bi0 drove the reactions related to the photoconversion of polypropylene. Subsequently, the photoconversion rates of PP into CO by Bi0@Bi3+‐KNbO3 reached 209.41 µmol gcat−1 h−1, which is 27.55 times higher than that achieved with KNbO3. Furthermore, the dual Bi–Nb sites effectively stabilize the key intermediate *COOH, thereby promoting the production of CH3COOH at a rate of 213.00 µmol gcat−1 h−1. This strategy of boosting photoconversion activity of PP into CO and CH3COOH offers an effective green solution to the serious issue of plastic pollution.

Construction of Multi-step Charge Transfer Pathways in Bi0@Bi3+-KNbO3 for Significantly Accelerated Photoconversion of Waste Plastics.

Photoconversion of waste plastics into valuable CO and CH3COOH represents a ground-breaking strategy for addressing plastic pollution issues. However, this process currently encounters significant challenges, primarily due to the limitation of catalyst activity and the difficulty in breaking C-C bonds. Herein, we present a novel approach that integrates multi-step charge transfer pathways with photothermal-driven reactions to improve photoconversion efficiency. By incorporating Bi0/Bi3+ metal as an electron transport mediator for multi-step charge transfer, we markedly enhanced the separation and transport of photoelectrons, thereby accelerating the generation of active species. Meanwhile, the heat generated by the localized surface plasmon resonance effect of Bi0 drove the reactions related to the photoconversion of polypropylene. Subsequently, the photo-conversion rates of PP into CO by Bi0@Bi3+-KNbO3 reached 209.41 μmol gcat-1 h-1, which is 27.55 times higher than that achieved with KNbO3. Furthermore, the dual Bi-Nb sites effectively stabilize the key intermediate *COOH, thereby promoting the production of CH3COOH at a rate of 213.00 μmol gcat-1 h-1. This strategy of boosting photoconversion activity of PP into CO and CH3COOH offers an effective green solution to the serious issue of plastic pollution.