Photocatalytic Removal Of Nitric Oxide Research Articles

Built-in electric field mediated S-scheme charge migration and Co-N4(II) sites in cobalt phthalocyanine/MIL-68(In)-NH2 heterojunction for boosting photocatalytic nitric oxide oxidation

The efficiency of photocatalytic Nitric Oxide(NO) oxidation is limited by the lack of oxygen(O2) active sites and poor charge carrier separation. To address this challenge, we developed a molecular Cobalt Phthalocyanine modified MIL-68(In)–NH2 photocatalyst with a robust Built-in electric field(BIEF). In the 2 % CoPc-MIN sample, the BIEF strength is increased by 3.54 times and 5.83 times compared to pristine CoPc and MIL-68(In)–NH2, respectively. This BIEF facilitates the efficient S-scheme charge transfer, thereby enhancing photogenerated carrier separation. Additionally, the Co-N4(II) sites in CoPc can effectively trap the separated photoexcited electrons in the S-scheme system. In addition, the Co-N4(II) sites can also serve as active sites for O2 adsorption and activation, promoting the generation of superoxide radical (O2–), thereby driving the direct conversion of NO to nitrate(NO3–). Consequently, the 2 % CoPc-MIN sample exhibits a remarkable photocatalytic NO removal efficiency of 79.37 % while effectively suppressing the formation of harmful by-product nitrogen dioxide(NO2) to below 3.5 ppb. This study provides a feasible strategy for designing high-efficiency O2 activation photocatalysts for NO oxidation.

Engineering the defect distribution via boron doping in amorphous TiO2 for robust photocatalytic NO removal

Nitric oxide (NO) pollutant can threaten the regional environment and human health. Solar-powered photocatalytic oxidation method is desirable for NO removal (ppb level) at ambient conditions, but suffers from the unsatisfactory activity and poor selectivity due to the sluggish molecular oxygen activation. Herein, we demonstrate that efficient photocatalytic NO removal can be realized by modulating the defects distribution of amorphous TiO2 via boron doping. Theoretical calculations and experimental results reveal that H3BO3 modification can refine the structure of surface oxygen vacancies, promoting electron-rich molecular oxygen activation to •OH. Meanwhile, bulk-phase oxygen defects can be filled by free-state B atoms, accelerating the electron transfer via Ti-O-B bonding. Homogeneous boron-doped amorphous TiO2 achieves about 5 times higher NO removal efficiency (∼50%) than that of amorphous TiO2 (∼9%) without releasing remarkable NO2 (selectivity, ∼97%). This study provides a state-of-the-art approach for robust photocatalytic NO removal by engineering the defect distribution.

Experimental and computational study on removal of nitric oxide using NH2-MIL-125: Revisiting removal mechanism

The NH2-MIL-125 (NM-125) or modified NM-125 materials are used for photocatalytic removal of nitric oxide (NO). Most researchers attributed few NO2 emission during NO photocatalysis to high selectivity towards the formation of nitrate ions due to the neglect of the principle of electroneutrality and pore structure of NM-125. This may cause misleading photocatalytic mechanism of NO removal. Herein, this work proposes a new mechanism behind NO removal using NM-125 based on experimental investigations and theoretical calculations. First, experimentally, the highest NO removal efficiency of 88.54 % with negligible NO2 emission occurs at the anhydrous condition. In addition, in-situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) measurements verify the presence and accumulation of NO2 as product during photocatalytic conversion of NO. Furthermore, density functional theory (DFT) calculations and grand canonical Monte Carlo (GCMC) computations demonstrate that there exist strong interactions between NO2 and -NH2 group within pores. Few NO2 is detected during experiments is probably due to its subsequent adsorption in the pores of NM-125. The new NO removal mechanism including photocatalytic conversion NO into NO2 and subsequent NO2 adsorption in the pores of NM-125 is thus proposed. This work provides a deeper insight into photocatalytic NO removal over NM-125 and its variants.

Nitric oxide removal by synergistic photooxidation and adsorption using Pd1/g-C3N4-UiO-66-NH2 P-A heterojunction

Simultaneous avoidance of secondary air pollution and catalyst deactivation remains a challenge for existing photocatalytic removal of nitric oxide (NO). Herein, a photocatalysis-adsorption (P-A) heterojunction is synthesized for eco-friendly NO removal by facilely grinding Pd single atoms (Pd1) anchored g-C3N4 (48CN/Pd) with UiO-66-NH2 (UION). Under visible-light irradiation, the 40UION-CN/Pd composite shows 93.91 % of NO removal efficiency with only 2.73 % of NO2 emissions and negligible catalyst deactivation. The DeNOx index increases remarkably from −0.66 for 48CN/Pd to 0.86 for 40UION-CN/Pd. Furthermore, the synthesized P-A heterojunction efficiently removes NO from real flue gases produced by a domestic coal-fired stove and from SO2-rich flue gases. The mechanism exploration based on experimental investigations and density functional theory (DFT) calculations reveals that UION captures the NO2 selectively produced by 48CN/Pd, simultaneously suppressing NO2 emissions and refreshing active sites for NO photooxidation. Moreover, the results of X-ray photoelectron spectroscopy (XPS), charge density difference calculation, energy-resolved distribution of electron traps (ERDT) and in-situ Kelvin probe force microscopy (KPFM) reveal that the built-in electric field and Type-II heterojunction formed between 48CN/Pd and UION promote the separation of photogenerated carriers, enhancing the catalytic activity of the composite. This work provides an innovative strategy to avoid NO2 emission and catalyst deactivation during photocatalytic NO removal.

Ti3C2 MXene-induced interface charge transferred in Z-scheme heterojunction for efficient photocatalytic removal of nitric oxide

Currently, NO pollution is an urgent challenge for us to face, and photocatalytic degradation has been recognized as one of the most promising methods to reduce it. As a representative photocatalyst, g-C3N4 has attracted researchers because of its low cost and excellent performance. In this work, a new triphasic Z-scheme heterostructure was built, TiO2/Ti3C2 MXene/g-C3N4, to improve the visible-light irradiation-induced NO removal efficiency of g-C3N4. In this Z-scheme heterostructure, Ti3C2 MXene could form a directional electron transfer thoroughfare between g-C3N4 and TiO2 to accelerate the electronic transmission rate, meanwhile, due to the specificity of the band structure, electrons on conduction band of g-C3N4 and holes on valence band of TiO2 can be well separated and react with the adsorbed species to achieve good photocatalytic performance. Because of the triphasic heterostructure formed by TiO2, Ti3C2 MXene and g-C3N4, the efficiency of this compound for visible-light irradiation-induced NO removal improves from 32% to 56%. This work provides a new strategy to improve NO removal efficiency and shows a broader application prospect of photocatalysts with a triphasic structure.

Photocatalytic NO removal based on TiO2 photonic crystals through slow photon effect

Photocatalysis based on TiO2 nanomaterials demonstrates great potential in low-concentration nitric oxide (NO) removal. The utilization of solar energy is critical for increasing the NO removal rate. Here, TiO2 photonic crystal (TiO2-PC) is synthesized for efficiently photocatalytic NO removal by improving the utilization of sunlight in the visible region. Under solar irradiation, the transient photocurrent response and NO removal ratio of TiO2-PC is ∼2.3 times and about double that of pristine TiO2-film. The slow photon effect, as verified by reflection and absorption spectra. This work provides a promising approach to fabricating TiO2-based photocatalysts for highly efficient NO removal.

Microwave‐Assisted Rapid Substitution of Ti for Zr to Produce Bimetallic (Zr/Ti)UiO‐66‐NH2 with Congenetic “Shell–Core” Structure for Enhancing Photocatalytic Removal of Nitric Oxide (Small 20/2023)

Bimetallic MOF Photocatalysts Ti atoms rapidly replace Zr atoms in UiO-66-NH2 crystal under microwave irradiation. The formed congenetic “shell-core” structure and the introduced electron acceptor, Ti, enhance the photocatalytic nitric oxide (NO) removal. Furthermore, the synergy of NO photooxidation and subsequent NO2 adsorption not only removes NO efficiently in an environmentally friendly fashion, but also provides raw NO2 safely and economically to industry. More details can be found in article number 2207198 by Hesheng Yu, Zhongchao Tan, and co-workers.

The electronic and optical properties, gas sensor and NO removal application investigations of noble metal-adsorbed MoSi2N4

In this paper, the electronic and optical properties, gas sensor behavior and photocatalytic nitric oxide (NO) removal applications of noble metal-adsorbed MoSi2N4 (NMs-MSN, NMs = Au, Ag, Cu, Pd and Pt) are investigated and screened based on first-principles calculations. The band gaps of MoSi2N4 decrease to different degrees after noble metals are adsorbed, especially when the band gap changes from intrinsic MoSi2N4 of 1.89 eV to Pd-MoSi2N4 of 1.59 eV. Based on density of states (DOS) analysis, new degenerate energy bands formed and combined with the valence band after Pd adsorbed, which resulted in a band gap decrease. The optical property calculations show that the light absorption range and coefficient of NMs-MSN significantly increase. Then, the sensor behaviors are investigated and screened based on the adsorption and recovery behaviors of gas molecules (including NO, CO, O2, CO2, NO2, H2O, H2S and NH3) on NMs-MSN. Based on the adsorption energy, recovery time and band gap changes after gas adsorption, it can be concluded that Ag-MSN is suitable for sensing SO2 molecules, that Au-MSN is suitable for sensing SO2, CO and O2 molecules, and that Pd-MSN is suitable for sensing N2, NO and NO2 molecules. The most suitable noble-metal atoms for the photocatalytic removal of NO are calculated and screened, and the Pd-MSN is determined to be most suitable for NO removal. The introduction of a Pd atom inhibits desorption of the toxic product nitrogen dioxide (NO2), inducing the main product to become a nitrate ion (NO3−). The mechanism indicates that the potential barrier is greatly reduced because electron-hole complexation is suppressed. In general, noble metal atom-adsorbed MoSi2N4 can effectively change the band gap, improve the light absorption coefficient, adjust the gas sensor behavior, and enhance the photocatalytic ability for NO removal.

Microwave-Assisted Rapid Substitution of Ti for Zr to Produce Bimetallic (Zr/Ti)UiO-66-NH2 with Congenetic "Shell-Core" Structure for Enhancing Photocatalytic Removal of Nitric Oxide.

Efficient nitric oxide (NO) removal without nitrogendioxide(NO2 )emission is desired for the control of air pollution. Herein, a series of (Zr/Ti)UiO-66-NH2 with congenetic shell-core structure, denoted as Ti-UION, are rapidly synthesized by microwave-assisted post-synthetic modification for NO removal. The optimal Ti-UION (i.e., 2.5Ti-UION) exhibits the highest activity of 80.74% without NO2 emission with moisture, which is 21.65% greater than that of the UiO-66-NH2 . The NO removal efficiency of 2.5Ti-UION further increases to 95.92% without photocatalyst deactivation under an anhydrous condition. This is because selectively produced NO2 in photocatalysis is completely adsorbed into micropores, refreshing active sites for subsequent reaction. In addition, the enhanced photocatalytic activity after Ti substitution is due to the presence of Ti electron acceptor, the potential difference between the shell and core of Ti-UION crystal, and the high conductivity of TiO units. Additionally, the improved adsorption of gas molecules not only favors NO oxidation, but also avoids the emission of NO2 . This work provides a feasible strategy for rapid metal substitution in metal-organic frameworks and insights into enhanced NO photodegradation.

Single Pd atoms anchored graphitic carbon nitride for highly selective and stable photocatalysis of nitric oxide

Efficient, stable, and selective photocatalytic conversion of nitric oxide (NO) into nitrogen dioxide (NO 2 ) is highly desirable but remains a big challenge. We prepare single atom catalyst (SAC) by anchoring single Pd atoms onto graphitic carbon nitride (CNPd) via chemical impregnation followed by calcination. The prepared CNPd SAC is confirmed by aberration-correction high-angle-annular-dark field scanning transmission electron microscopy and X-ray absorption fine structure spectroscopy. The synthesized SAC outperforms its competitors reported earlier for photocatalytic removal of NO under visible light and simulated sunlight irradiation in terms of selectivity and stability. The SAC maintains a NO removal efficiency of 83% and an instantaneous selectivity for NO 2 of 92.8% over 117.6 h under simulated sunlight with the inlet NO concentration of 12 ppm. This duration is about 23.5 times the longest duration tested for other catalysts in the literature. The experimental results and density functional theory (DFT) calculations reveal that single Pd atom promotes the photocatalytic degradation of NO. Moreover, the DFT calculations prove that the nitrate ions that accumulate on the surface of the SAC can react with NO to produce NO 2 . This reaction enhances the selectivity for NO 2 and stability of the SAC. The CNPd catalyst exhibits high photocatalytic activity, selectivity and stability for the removal of NO under visible light. • The CNPd SACs exhibit stable and high photocatalytic removal of NO. • The CNPd SACs show ultra-high selectivity for the conversion of NO into NO 2 which can be easily addressed by wet scrubbing. • NO removal efficiency of CNPd SACs remain 83% after solar irradiation over 117.6 h. • DFT calculations reveal the mechanism of photocatalytic over CNPd SACs. • DFT calculations explain the reason for selective conversion of NO to NO 2 .

Rapid fabrication of MgO@g-C3N4 heterojunctions for photocatalytic nitric oxide removal.

Nitric oxide (NO) is an air pollutant impacting the environment, human health, and other biotas. Among the technologies to treat NO pollution, photocatalytic oxidation under visible light is considered an effective means. This study describes photocatalytic oxidation to degrade NO under visible light with the support of a photocatalyst. MgO@g-C3N4 heterojunction photocatalysts were synthesized by one-step pyrolysis of MgO and urea at 550 °C for two hours. The photocatalytic NO removal efficiency of the MgO@g-C3N4 heterojunctions was significantly improved and reached a maximum value of 75.4% under visible light irradiation. Differential reflectance spectroscopy (DRS) was used to determine the optical properties and bandgap energies of the material. The bandgap of the material decreases with increasing amounts of MgO. The photoluminescence spectra indicate that the recombination of electron-hole pairs is hindered by doping MgO onto g-C3N4. Also, NO conversion, DeNOx index, apparent quantum efficiency, trapping tests, and electron spin resonance measurements were carried out to understand the photocatalytic mechanism of the materials. The high reusability of the MgO@g-C3N4 heterojunction was shown by a five-cycle recycling test. This study provides a simple way to synthesize photocatalytic heterojunction materials with high reusability and the potential of heterojunction photocatalysts in the field of environmental remediation.

Enhanced photocatalytic removal of nitric oxide over\xa0Ag-decorated ZnSn(OH)6 microcubes

Presently, most of the population has been facing a string of severe air pollution problems that include the intensive emission of nitric oxide (NO), which requires a practical approach to sustain our living conditions. Herein, Ag nanoparticles (Ag NPs)-decorated ZnSn(OH)6 microcubes (Ag:cZHS) photocatalysts are synthesized and used for photocatalytic NO removal under solar light activation. The properties of the newly obtained photocatalysts are comprehensively characterized by a series of typical methods. The NO removal performance over the c:ZHS photocatalysts was increased markedly upon being combined with Ag NPs because of the surface plasmon resonance effect. The contribution of electron (e−), hole (h+), hydroxyl radical (•OH), and oxygen radicals (•O2) was investigated through trapping tests and electron spin resonance analysis. Also, the by-products and apparent quantum efficiency of the photocatalysts were thoroughly studied.

Enhancing quantum efficiency at Ag/g-C3N4 interfaces for rapid removal of nitric oxide under visible light

Nitric oxide (NO) pollution presents a pressing issue in preserving the air quality for sustainable development. It is highly desirable to employ robust photocatalytic materials for addressing NO pollution in an energy-efficient fashion. Here, Ag/g-C3N4 heterojunctions are successfully fabricated via a photo-reduction approach. Ag nanoparticles are deposited on g-C3N4, having an average diameter of 8.45 nm. Upon incorporating Ag species, the energy band gap of g-C3N4 is reduced from 2.76 to 2.70 eV. Compared with g-C3N4, the photocatalytic NO removal efficiency of 20% Ag/g-C3N4 is increased to 80% because of the enhanced quantum efficiency (14 × 10−4%). After five recycling runs, the 20% Ag/g-C3N4 heterojunction still presents an excellent performance, representing a highly stable photocatalytic material. The critical contribution of •O2‾ and holes during the photocatalytic processes are also studied using radical trapping experiments. Our work offers a simple but scalable approach for generating high-performance photocatalytic materials, potentially enabling efficient removal of NO pollution without extensive energy consumption.

Facile ball-milling synthesis of TiO2 modified ZnO for efficient photocatalytic removal of atmospheric nitric oxide gas under solar light irradiation

In this study, ZnO/TiO2 composite is synthesized by a facile ball-milling process. The X-ray diffraction (XRD) patterns and Fourier transform infrared (FTIR) results of the composite sample indicate all properties of the two-component original materials including ZnO and TiO2. The as-prepared ZnO/TiO2 composite shows the highest photocatalytic nitric oxide (NO) oxidation efficiency under solar light irradiation which is higher than 2.8 times compared to pure ZnO nanoparticles (NPs). Especially, the NO2 conversion yield is decreased drastically from 12.78% to 7.18% when ZnO/TiO2 composites are used as a photocatalyst for the atmospheric NO gas removal under solar light. In addition, the photocatalytic NO removal performance of the ZnO/TiO2 composite is still high 33.17% and all the characteristic peaks and bonds remain in the material after many recycles.

Rapid and Scalable Fabrication of TiO2@g-C3N4 Heterojunction for Highly Efficient Photocatalytic NO Removal under Visible Light

ABSTRACT TiO2@g-C3N4 heterojunction composites were successfully synthesized via one-step pyrolysis using commercial TiO2 and urea. The photocatalytic performance of a composite was investigated by measuring the degradation of nitric oxide (NO) under visible light. The light absorption and bandgap of the selected materials were determined using diffuse reflectance spectroscopy (DRS), which confirmed the strong photocatalytic activity of the materials under visible light. The NO photodegradation efficiency of the composite was almost 90% under visible irradiation. The generation of by-products and nitrogen dioxide (NO2) was calculated to determine the conversion pathway of NO during the photocatalytic reaction. Furthermore, the results for recycling indicated that the TiO2@g-C3N4 composite exhibited excellent stability. Also, the morphology and the chemical compositions of the materials were observed using high-resolution transmission electron microscopy (HR-TEM) images and X-ray photoelectron spectroscopy (XPS). Raman spectroscopy was used to detect the structural vibrations in the materials. Through electron spin resonance (ESR) and trapping tests, the photocatalytic mechanism of the TiO2@g-C3N4 composite was also elucidated, in which superoxide radical anions were found to play a significant role in NO removal.

Ti3C2 MXene modified g-C3N4 with enhanced visible-light photocatalytic performance for NO purification

As for photocatalytic oxidation of nitric oxide (NO), the low NO oxidation activity and generation of by-products (cf. NO2) are the urgent challenge. To tackle these issues, a simple in-situ growing stragegy was employed to constructe Ti3C2/g-C3N4 system. The fabricated Ti3C2/g-C3N4 composite (TC-CN) presented enhanced photocatalytic NO removal efficiency and inhibited toxic NO2 generation. Density functional theory (DFT) calculations and experimental characterizations were combined to demonstrate the presence of strong interface effect between Ti3C2 and g-C3N4, which could greatly improve photo-generated charge carrier separation via the construction of electron transfer channels, and further activate oxygen molecules adsorbed on the side of Ti3C2 layer. As a result, nitrite and nitrate instead of NO2 were the final products during the photocatalytic reaction process through the monitoring by in situ diffuse reflectance infrared spectroscopy (DRIFTS).

Development of photocatalytic chip seal for nitric oxide removal on the surface of pavement using g-C3N4/TiO2 composite

Nitric oxide (NO) emitted from vehicle exhausts are associated with adverse health effects on the public. This study prepared a graphitic carbon nitride (g-C3N4)/TiO2 composite using melamine and titanium dioxide (TiO2) and then applied the composite on chip seal for the photocatalytic removal of NO. The g-C3N4/TiO2 composite was synthesised by an ultrasonic-assisted solid-phase synthetic method. The results of X-ray powder diffraction, Fourier-transform infrared spectroscopy, and a scanning electron microscope indicated that g-C3N4 and TiO2 were successfully synthesised and most of the sheet structures of g-C3N4 were attached by approximately spherical TiO2 particles. The UV–Vis and PL characterisation suggested that optical absorption range of TiO2 was broadened and the separation of electronic-holes was hindered, which contributed significantly to the enhancement of the visible-light photocatalytic activity. The loading capacity of 0.0092 kg/m2 g-C3N4/TiO2 composite on chip seal specimens had the highest NO removal efficiency of 31.41% within 30 min.

Time-resolved characterization of non-thermal plasma-assisted photocatalytic removal of nitric oxide

We performed time-resolved characterization of plasma-photocatalytic removal of nitric oxide (NO) in a ceramic foam packing double dielectric barrier discharge reactor using mid-infrared laser absorption spectroscopy. Non-thermal plasma (NTP) was generated in the porous ceramic foam coated with mesoporous TiO2 thin film. Real-time NO monitoring was performed using a quantum cascade laser at 5.26 µm combined with a custom-designed multipass gas cell, leading to a sub-ppm detection limit at 0.1 s measurement time. By analyzing the feed gas of 90 ppm NO/1% O2 balanced in N2, the plasma treatment without TiO2 photocatalyst had no effect on NO removal when the discharge power was below 45 W. In comparison, the NTP-TiO2 system achieved an efficiency of 49% for NO removal even at the relatively low discharge power of 18 W. The synergy between NTP and TiO2 photocatalyst effectively promotes the NO removal at low plasma discharge powers. However, we also observed a negative effect of TiO2 photocatalyst on NO removal at a relatively high discharge power of 135 W.

Ceramic tiles for photocatalytic removal of NO in indoor and outdoor air under visible light

The photo-catalytic oxidation is a promising air-cleaning technology in the decomposition of volatile organic compounds and mineralization of undesired chemical substances in indoor or outdoor environment. Recently, nitrogen oxides are often present in indoor and outdoor air due to burning activities, among which nitric oxide (NO) is the main pollutant. Based on the post-treatment technology, ceramic tiles for removal of NO in indoor and outdoor air under visible light were prepared by coating a photo-catalytic functional layer of TiO2 tri-doped with N, F and Fe ions via sol-gel method. Considering the effects of the reaction temperature, the light intensity and NO initial concentration, these photocatalytic tiles possessed superior photocatalytic activities to remove nitric oxide. The morphology and crystal structure of the photocatalytic surfaces were characterized by atomic force microscopy (AFM) and X-ray diffraction analysis (XRD). Tri-doping N, F and Fe with TiO2 enlarged the crystal form aberration rate and defect, resulting in more impurity energy levels introduced into TiO2. Besides inorganic NO air pollutants, the organic compounds could also be purified on the optimal ceramic tiles under visible light. The modified films kept the ceramic tiles with the enhanced photocatalytic efficiency, low water adsorption performance, good fastness and antibacterial capability to reduce the risk of bacterial infection. Hence, they are the promising candidates for practical applications in both indoor and outdoor environmental improvement.

Enhanced visible light photocatalytic performance and reaction mechanism on Ag/AgCl-LaCO<sub>3</sub>OH nanorods composite

Air pollution has become a focused issue worldwide with the rapid development of industry. As one of the major air pollutants, nitric oxide (NO) could cause to serious atmospheric problems, such as acid rain, haze and photochemical smog. Photocatalysis as a green technology has received increasing attention, because it has represented greatly potential application over the late decades. As a novel photocatalyst, LaCO3OH possesses relatively negative conduction band and positive valence band edges, which can be enable to sufficient potential for photocatalytic air decomposition. But the band gap of LaCO3OH (4.1 eV) allows only a small portion of solar spectrum in the ultraviolet (UV) light region to be absorbed. To extend the light absorption spectra into the visible light region, the combination of narrow band gap Ag/AgCl with the wide band gap LaCO3OH to build heterojunction could utilize abundant solar light. Noble metal nanoparticles (NPs) showed strong visible light absorption due to surface Plasmon resonance effect (SPR). In particular, silver NPs show SPR in the visible region, which has been utilized to develop efficient plasmonic photocatalysts. In this study, a three-component Ag/AgCl-LaCO3OH nanorod photocatalyst has been fabricated successfully through a chemical precipitation treatment and applied to photocatalytic NO removal. The as-prepared samples were characterized by XRD, SEM, TEM, XPS, UV-vis DRS, PL and ESR. The photocatalytic NO oxidation process was monitored by in situ DRIFTS. The results indicated that the visible-light harvesting and the photogenerated carrier separation can be enhanced simultaneously, which could result from introduction of Ag/AgCl into LaCO3OH (LCO) nanorod photocatalyst. Under visible-light irradiation, the photogenerated electron-hole pairs separation is promoted by the plasma resonance (SPR) effect of the metallic Ag0. The hot electrons would be transferred to the defect level endowed by the oxygen vacancies of the LCO. Subsequently, the electron can be transferred to the surface of LCO, captured by O2 to form ·O2− radicals, which plays a dominant role in the photocatalytic NO oxidation. In addition, the holes would be transferred to the surface of AgCl, and interact with Cl− to transform Cl0, which can directly participate in the oxidation of NO. Furthermore, Cl0 can be reduced to Cl− and react with Ag+ to forming AgCl, avoiding the photocorrosion of AgCl effectively. Meanwhile, the effect of the mol ratio of Ag/AgCl on the photocatalytic performance was also evaluated. The optimized Ag/AgCl-LCO (mol ratio at 75%) nanorods demonstrated a high NO removal ratio of 54.0%, which far exceeding that of the individual LCO (3.1%) or Ag/AgCl (18.0%) photocatalyst. Moreover, the in situ FT-IR spectra was used to dynamically monitor the intermediate toxic by-products, in combination with the active species, and further reveal the mechanism of photocatalytic NO oxidation from the molecular level. The reaction mechanism can be described as Ag + visible light → e−+h+, e−+O2→ ·O2−, h++AgCl→Cl0+Ag+, ·O2−+NO→NO3−, Cl0+ NO→NO3−+Cl−, NO+2·OH→NO2+H2O, NO2+·OH→NO3−+H+ and Cl−+Ag+→AgCl. The present work could provide navel perspectives for advancing the photocatalysis efficiency, offer a new insight of the photocatalytic reaction mechanism and promote large-scale environmental decontamination applications of plasma-based semiconductor composites.