Materials Today Nano最新文献

{"title":"Bismuth nanoparticles-enhanced proton therapy: Concept and biological assessment","authors":"Irina N. Zavestovskaya ,&nbsp;Marina V. Filimonova ,&nbsp;Anton L. Popov ,&nbsp;Ivan V. Zelepukin ,&nbsp;Alexander E. Shemyakov ,&nbsp;Gleb V. Tikhonowski ,&nbsp;Maxim Savinov ,&nbsp;Alexander S. Filimonov ,&nbsp;Anna A. Shitova ,&nbsp;Olga V. Soldatova ,&nbsp;Danil D. Kolmanovich ,&nbsp;Pavel V. Shakhov ,&nbsp;Polina A. Kotelnikova ,&nbsp;Anton A. Popov ,&nbsp;Nikita N. Chukavin ,&nbsp;Nikita A. Pivovarov ,&nbsp;Alexander V. Syuy ,&nbsp;Sergey M. Klimentov ,&nbsp;Vladimir A. Ryabov ,&nbsp;Sergey A. Ivanov ,&nbsp;Andrei V. Kabashin","doi":"10.1016/j.mtnano.2024.100508","DOIUrl":"10.1016/j.mtnano.2024.100508","url":null,"abstract":"<div><p>Proton therapy presents an appealing radiotherapy modality for the treatment of deeply-seated and unresectable tumors, but it still needs additional means to enhance the localization and efficiency of therapeutic action. Here we explore the use of elemental bismuth nanoparticles (Bi NPs) as sensitizers for proton therapy enhancement. Spherical Bi NPs were prepared by the method of pulsed laser ablation, followed by their coating with Pluronic polymer to stabilize them in a physiological environment. We observed efficient apoptotic cell death after proton irradiation at the Bragg peak, which was explained by high proton stopping power and low work function of Bi. The maximal effect was observed for 3 Gy radiation and 50 μg/mL NPs dose with 97 % inhibition of tumor cell clonogenic activity. The strong therapeutic effect was confirmed <em>in vivo</em> using aggressive Sa37 sarcoma tumors in mice. We observed 60 % inhibition of primary tumor growth with a decrease of metastatic potential in popliteal and axillary lymph nodes. Combined with X-ray contrast properties and radiosensitizing functionalities, the proposed concept of Bi NPs-enhanced proton therapy promises a major upgrade for cancer therapy.</p></div>","PeriodicalId":48517,"journal":{"name":"Materials Today Nano","volume":"27 ","pages":"Article 100508"},"PeriodicalIF":8.2,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141985635","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Metal assisted chemical etching derived reusable and scalable production of large-area Ag nanowire-based flexible transparent electrodes for electrochromic Zn-ion battery","authors":"Sambedan Jena ,&nbsp;Somesh T.E. ,&nbsp;Anandarup Bhattacharyya ,&nbsp;Hoang Tuan Nguyen ,&nbsp;Duy Thanh Tran ,&nbsp;Nam Hoon Kim ,&nbsp;Joong Hee Lee","doi":"10.1016/j.mtnano.2024.100505","DOIUrl":"10.1016/j.mtnano.2024.100505","url":null,"abstract":"<div><p>To advance polydimethylsiloxane (PDMS)-supported silver nanowires (Ag NWs) based flexible and transparent electrodes (AgNWs/PDMS), innovative patterning techniques are essential for enabling large-area fabrication with cost-effective reusability features. Here, we introduce a metal assisted chemical etching (MACE) protocol for patterning Si wafers, allowing the repetitive fabrication of large-sized AgNWs/PDMS electrodes with controlled penetration depth for the first time. To the best of our knowledge, MACE technology has not previously been employed for fabricating AgNWs/PDMS electrodes. Through the careful selection of etchant, etching time, and suitably doped Si wafers (n-type and p-type), the resulting AgNWs/PDMS electrodes offer favorable optical, electrical and flexiblity characteristics. The electrodes deliver a sheet resistance of 18 Ω‧sq⁻¹ at 88 % transmittance (550 nm) while retaining 93.18 % transmittance with only a 7 Ω‧sq⁻¹ resistance increase after 10,000 bending cycles (3 mm). The penetration depth control offered by this method ensures impressive mechanical durability without additional post-processing. Moreover, the etched Si wafers can be reused multiple times, reducing overall costs. The sizes of AgNWs/PDMS electrodes produced using this method depend entirely on the Si wafer size, allowing scalability by employing larger wafers. As a proof-of-concept, we also demonstrate the fabrication of a robust, flexible, electrochromic zinc ion battery utilizing the AgNWs/PDMS electrodes developed in this study.</p></div>","PeriodicalId":48517,"journal":{"name":"Materials Today Nano","volume":"27 ","pages":"Article 100505"},"PeriodicalIF":8.2,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141964292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Focus review on γ′ coarsening in theorical development and application in Ni-base superalloys and high/medium-entropy alloys","authors":"Yongan Chen ,&nbsp;Dazhao Li ,&nbsp;Zhijie Yan ,&nbsp;Shaobin Bai ,&nbsp;Ruofei Xie ,&nbsp;Jian Sheng","doi":"10.1016/j.mtnano.2024.100507","DOIUrl":"10.1016/j.mtnano.2024.100507","url":null,"abstract":"<div><p>Long-term thermal exposure-induced γ′ coarsening strongly influences the mechanical properties of Ni-base superalloys and high/medium entropy alloys (H/MEAs), which has long been of scientific and industrial concern. In revealing the coarsening behavior, a great deal of theorical research has been made over several decades. One major advance is the development of Ostwald ripening kinetics theories, which allows for a quantitative description of γ′ coarsening kinetics. Nowadays, there have been two types of theorical models in wide acceptance, which advocate the matrix-diffusion controlled (LSW-family models) and trans-interface-diffusion controlled (TIDC model) kinetics mechanisms, respectively. Both of them have been validated in experiments and computational simulations. Besides, another major advance is the theorical revelation of the particle morphology evolution as γ′ coarsening, by means of energetic calculations and phase-field simulations. It has been shown that the morphological evolution depends on the combined effects of interfacial energy, elastic strain energy, and elastic interaction energy. The latter two generally play a dominate role in particle shape changes and regular spatial rearrangements, respectively. Based on these theories, the γ′ coarsening kinetics and morphological evolution patterns in Ni-base superalloys and H/MEAs has been clearly revealed and compared in many studies. Herein, we present a review on the development of these γ′ coarsening theories and their applications. This is not only instructive for alloy design and failure prevention, but also informative for further theorical extensions.</p></div>","PeriodicalId":48517,"journal":{"name":"Materials Today Nano","volume":"27 ","pages":"Article 100507"},"PeriodicalIF":8.2,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141964293","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Metabolic regulating enhanced immunological activating nanocomposites for tumor microenvironment normalization and immunotherapy","authors":"Chen Wang ,&nbsp;Qiliner Feng ,&nbsp;Hongli Lu ,&nbsp;Qiubei He ,&nbsp;Peng Zhang ,&nbsp;Junjie Tang ,&nbsp;Zhuoyin Liu ,&nbsp;Jie Liu ,&nbsp;Baizhu Chen","doi":"10.1016/j.mtnano.2024.100509","DOIUrl":"10.1016/j.mtnano.2024.100509","url":null,"abstract":"<div><p>The mitochondrial energy metabolic reprogramming of tumors leads to the hypoxic, acidic, and immunosuppressive microenvironment. To regulate the reprogrammed mitochondrial energy metabolism and the abnormal tumor microenvironment (TME) intracellularly and extracellularly, herein, we purposely constructed the metabolic regulating and immunological activating nanocomposites (NCs) formed by the manganese dioxide (MnO₂) nanoparticles loaded with lactate oxidase (LOX), dichloroacetic acid (DCA) and SR-717, camouflaged by the cell membrane of tumors. After the NCs targeting to the tumors, the loaded DCA inhibited the glycolysis and triggered the produced pyruvate into mitochondria for further degradation. DCA also reduced the amount of CD39 and CD73, thereby promoting the accumulation of ATP intracellularly. The cascade of MnO₂ and LOX catalyzed the lactate to pyruvate together with oxygen for the relief of the hypoxic and immunosuppressive TME. The regulation of the mitochondrial metabolism together with the degradation of lactate contributed to activating the immune cells. Meanwhile, the loaded SR-717 together with the release of Mn²⁺ activated the cyclic guanosine monophosphate adenosine monophosphate synthase/interferon gene stimulator signaling pathway for efficient antitumor effects and immunotherapy. Taken together, the designed multifunctional nanocomposites realized an effective tumor immunotherapy by regulating the reprogrammed mitochondrial energy metabolism intracellularly, relieving the abnormal TME and activating the innate antitumor immunological effects extracellularly. Our work established an approach to the enhanced immunotherapy by regulating the reprogrammed metabolism for efficient cancer treatment.</p></div>","PeriodicalId":48517,"journal":{"name":"Materials Today Nano","volume":"27 ","pages":"Article 100509"},"PeriodicalIF":8.2,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141979107","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Simple preparation of multifunctional PEDOT-based composites for wearable smart textiles","authors":"Bibo Zhou ,&nbsp;Xiaoming Zhao ,&nbsp;Yuanjun Liu","doi":"10.1016/j.mtnano.2024.100502","DOIUrl":"10.1016/j.mtnano.2024.100502","url":null,"abstract":"<div><p>The manufacture of multifunctional flexible sensors has become a hot topic in the field of wearable technology. It has attracted the attention of many researchers. However, it is still difficult to prepare high-performance fabric-based flexible sensors through a simple process. We prepared PEDOT conductive polymer on cotton fabric by chemical in-situ polymerization. Through the analysis of FTIR and XPS test results, PEDOT was successfully loaded onto cotton fabrics. The SEM test results show that PEDOT has a good loading effect on cotton fabric. The surface resistance of the synthesized PEDOT/cotton fabric is 448 Ω, and the conductivity is 1.761 S/m. The highest sensitivity can reach 84.64 kPa⁻¹ at 0–70 kPa, and it still has good stability after 1000 times of compression, fast response/recovery time (90/100 ms), and low detection limit (48 Pa). At the same time, PEDOT/cotton fabric also has a good thermal insulation effect and electrothermal response effect. When the voltage is 12 V (within the safe voltage of the human body), the surface of the material can reach 50 °C, which is suitable for human physiotherapy (40 °C–55 °C). In addition, we also explored the application potential of PEDOT/cotton fabrics as other functional textiles. The test results show that PEDOT had excellent UV protection performance and good wave absorption performance. The UPF value can reach 566, which can absorb more than 99 % of ultraviolet light, which is much higher than the standard of ultraviolet protection products. The minimum reflection loss (RL_min) is −21.19 dB, which can absorb 99 % of the electromagnetic wave, and the effective absorbing bandwidth (EAB) is 5.1 GHz, which has good absorbing performance. The PEDOT/cotton fabric prepared in this study integrates pressure sensing, electrothermal physiotherapy, microwave absorption, and ultraviolet shielding. It can be applied to a variety of scenarios and is of great significance as a functional textile.</p></div>","PeriodicalId":48517,"journal":{"name":"Materials Today Nano","volume":"27 ","pages":"Article 100502"},"PeriodicalIF":8.2,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141844333","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Simultaneous improvements in energy density and thermal conductivity of PAN polymer nanocomposites enabled by core-shell structure BZCT@BNNS nanofibers","authors":"Dongyi Wu ,&nbsp;Haiping Xu ,&nbsp;Hongfei Li ,&nbsp;Ziyue Wang ,&nbsp;Wei Xiong ,&nbsp;Lihe Guo ,&nbsp;George Chen","doi":"10.1016/j.mtnano.2024.100501","DOIUrl":"10.1016/j.mtnano.2024.100501","url":null,"abstract":"<div><p>If the heat generated by electronic devices in high-power applications cannot be dissipated in a timely manner, it will not only affect the use of the equipment but also reduce its service life. Therefore, there is an urgent need to develop thin films of dielectric nanocomposites with high thermal conductivity, high energy storage, and excellent flexibility and electrical insulation performance. In this study, we reported the successful preparation of BZCT nanofibers (BZCT NFs) and core-shell structures BZCT@BNNS nanofibers using electrospinning and coaxial electrospinning techniques, respectively, and there were used to composite with polyacrylonitrile (PAN) polymer matrix to prepare BZCT NFs/PAN and BZCT@BNNS/PAN dielectric nanocomposites thin film. Research has found that when the shell thickness of BNNS is 15 nm and BZCT@BNNS (15 nm) volume fraction is 20 vol%, the comprehensive performance of the dielectric nanocomposites is the best, with thermal conductivity and energy storage performance of 3.36 W m⁻¹K⁻¹ and 12.23 J/cm³, respectively. Therefore, the nanocomposites thin film can be used as a potential high-performance dielectric material for thermal management applications in high-power density electronic devices.</p></div>","PeriodicalId":48517,"journal":{"name":"Materials Today Nano","volume":"27 ","pages":"Article 100501"},"PeriodicalIF":8.2,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141841306","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Avoiding dust contamination by near-plasma chemical surface engineering","authors":"Dirk Hegemann ,&nbsp;Michał Góra ,&nbsp;Flaela Kalemi ,&nbsp;Paula Navascués","doi":"10.1016/j.mtnano.2024.100503","DOIUrl":"10.1016/j.mtnano.2024.100503","url":null,"abstract":"<div><p>Dust contamination is a frequent problem when processing materials at the nanoscale by plasma technology. Various approaches have thus been applied to protect samples, however, requiring to adjust plasma properties which also imposes limitations on the process window. We therefore propose near-plasma chemical (NPC) surface engineering as a way to avoid dust contamination during and after plasma operation without altering the plasma environment by simply locating a polymeric mesh above the samples in the plasma sheath. Because of the electric potential acquired by the mesh, heavy charged particles cannot pass the open area of the mesh, avoiding their contact with the samples positioned below. Samples fabricated by NPC surface engineering are dust-free independently on the size or the origin of the powder nanoparticles. This neat approach can support many high-precision, dust-free applications of plasma technology on an industrial scale.</p></div>","PeriodicalId":48517,"journal":{"name":"Materials Today Nano","volume":"27 ","pages":"Article 100503"},"PeriodicalIF":8.2,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2588842024000531/pdfft?md5=7ab1342e2d1fb03a04c16c65e1fb5ab6&pid=1-s2.0-S2588842024000531-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141844331","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electrons redistribution of palladium-copper nanoclusters boosting the direct oxidation of methane to methanol","authors":"Mangen Tang ,&nbsp;Linhui Tan ,&nbsp;Yi Shi ,&nbsp;Yueshan Xu ,&nbsp;Xue Zhang ,&nbsp;Shengtao Zhong ,&nbsp;Haiyan Zhang ,&nbsp;Jing Li ,&nbsp;Kai Zhang ,&nbsp;Ying Liang ,&nbsp;Qi Chen ,&nbsp;Xinlong Tian ,&nbsp;Peilin Deng","doi":"10.1016/j.mtnano.2024.100506","DOIUrl":"10.1016/j.mtnano.2024.100506","url":null,"abstract":"<div><p>The direct oxidation of methane to methanol (DOMM) at mild conditions is an enormous attractive yet highly challenging, which is known as the “Holy Grail” reaction. In this work, we prepare the Pd_xCu_y NCs supported on mesoporous sulfur-carbon materials and investigate their catalytic DOMM performance. The Pd₁₄Cu₁ NCs exhibits the excellent DOMM performance with the productivity of 34.3 mmol g⁻¹ h⁻¹ and the selectivity of 92.3 % at 150 °C when H₂/O₂ as active oxygen species, which was obviously superior to other PdCu catalysts. The enhanced performance of Pd₁₄Cu₁ NCs in DOMM is attributed to the non-crystalline atomic arrangement of tiny cluster structures and the synergistic electronic effect between Pd and Cu atoms, which can reduce the desorption temperature for methane, improve the in-situ generation of H₂O₂, and provide more active oxygen. The time-resolved in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) demonstrated that a radical-involved reaction pathway on Pd₁₄Cu₁ NC. This work provides the understanding for synergistic effect dual metallic and helps to design highly efficient and selective catalysts for the direct oxidation of CH₄.</p></div>","PeriodicalId":48517,"journal":{"name":"Materials Today Nano","volume":"27 ","pages":"Article 100506"},"PeriodicalIF":8.2,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141884266","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhancing thermal consistency and stability of quantum dots through encapsulation: A study on microscale-structured hybrid for WLEDs","authors":"Ha Trang Nguyen ,&nbsp;Thanh Thao Tran ,&nbsp;Manjeet Kumar ,&nbsp;Jinwon Song ,&nbsp;Seung Hee Choi ,&nbsp;Ho-Jung Jeong ,&nbsp;Young Hyun Song ,&nbsp;Ju-Hyung Yun","doi":"10.1016/j.mtnano.2024.100504","DOIUrl":"10.1016/j.mtnano.2024.100504","url":null,"abstract":"<div><p>Quantum dots (QDs) are regarded as highly potential materials for color conversion in light-emitting diodes (LEDs) and display technologies owing to their distinctive and outstanding optical characteristics. Nevertheless, the energy transfer process occurring among various colored QDs, known as Förster resonance energy transfer (FRET), results in a notable redshift in fluorescence emission, restricting the precise control of photoluminescence spectra in fabricated devices. This study presents a dual-impact technique to enhance the stability of CdSe/ZnS colloidal QDs while also preventing the FRET process. This is achieved by encapsulating the QDs within silica (SiO₂) and ethylene-vinyl acetate (EVA) films. The research features two distinct encapsulation methods: enveloping multiple QDs within a SiO₂ matrix (MQD) and adsorbing QDs onto SiO₂ spheres as a shell (SQD and SQDS). Those hybrid structures are successfully fabricated with their nanostructure, chemical composition, and optical properties extensively analyzed. Moreover, the photo-physical properties of QDs/SiO₂/EVA hybrid composite films and their impact on blue lightemitting diodes (LEDs) and White-LEDs have been conducted. Among those formulations explored, the MQD/EVA films stand out, displaying natural sunlight color emission with a color temperature of 4214 K, a color coordinate at (0.37, 0.37), and significant improvements in chromatic and thermal stability under high driving power. The successful integration of high-molecular-weight polymers and SiO₂ coatings highlights the effectiveness of this approach in producing robust, high-quality QD-polymer film composites, making them ideal candidates for display technologies.</p></div>","PeriodicalId":48517,"journal":{"name":"Materials Today Nano","volume":"27 ","pages":"Article 100504"},"PeriodicalIF":8.2,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141848375","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The practical utility of nitrogen doped TiO2 as a photocatalyst for the oxidative removal of gaseous formaldehyde","authors":"Dae-Hwan Lim ,&nbsp;Hubdar Ali Maitlo ,&nbsp;Sherif A. Younis ,&nbsp;Ki-Hyun Kim","doi":"10.1016/j.mtnano.2024.100499","DOIUrl":"10.1016/j.mtnano.2024.100499","url":null,"abstract":"<div><p>This study reports the development of nitrogen-doped TiO₂ (N–TiO₂: N/Ti molar ratio = 1) photocatalyst with the enhanced photoelectronic properties for the phtocatalytic oxidation (PCO) of formaldehyde (FA). The N–TiO₂ photocatalyst is coated with ceramic beads and placed in a packed-bed tube reactor to examine the PCO-based mineralization of FA vapor (100 - 500 ppm) under ultraviolet (UV)-A illumination (32 W light source) with the control of flow rate (100–500 mL min⁻¹), O₂ (0–21%), and relative humidity (RH: 0–100%). Accordingly, the N-TiO₂ in dry conditions showcases 100% degradation of 100 ppm FA with high stability over 5 reuse cycles (compared to the P25 (75.9%) and bare TiO₂ (69.2%)) at a flow rate of 100 mL min⁻¹ and a 21 % O₂ level (quantum yield = 1.72.E−02 molecules photon⁻¹ and space-time yield = 3.44.E−03 molecules photon⁻¹ mg⁻¹). The superior performance of N–TiO₂ may reflect the combination of N/O atoms in the crystal structure to enhance the photo-redox reactivities with the heightened valence band enegry and prolonged lifespan of charge carrier (1.34 ns) relative to 1.04 ns of P25 and 1 ns of pure (anatase) TiO₂. The PCO efficiency of N–TiO₂ increases by around 1.6 times in slightly humid conditions (74.6%: RH 20%) compared to dry conditions (47%: RH 0%) while the absence of oxygen (at 0% O₂) reduces it significantly down to 13.6%. <em>In situ</em> diffuse reflectance infrared Fourier transform spectroscopy and electron paramagnetic resonance studies confirm the critical role of O₂ and H₂O vapor on the enhanced FA mineralization rate (CO₂ yield = 91 %) through the generation of ^•O₂^-/^•OH oxidative radicals. This study offers deep insights into the practical utility of N–TiO₂ for the photocatalytic mineralization of aldehyde VOCs.</p></div>","PeriodicalId":48517,"journal":{"name":"Materials Today Nano","volume":"27 ","pages":"Article 100499"},"PeriodicalIF":8.2,"publicationDate":"2024-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141623306","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}