OPTICAL MATERIALS
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2026
·
IF 4.3
Shanxin Xiong,QingQing He,Xin Cui,Xicheng Lu,Chunxia Hua,Ming Gong,Jia Chu
Nickel oxide (NiO), as a typical anodic electrochromic material, has been widely employed in complementary electrochromic devices (CECDs) with tungsten oxide (WO 3 ) because of its excellent charge compensation capability and reversible redox behavior. However, its poor electrical conductivity and sluggish ion diffusion kinetics hinder further improvements in electrochromic performance. In this work, carbon quantum dots (CQDs) were introduced into the NiO electrochromic system to fabricate NiO/CQDs composite films, and the regulatory mechanism of CQDs on the electrochromic behavior of NiO was systematically investigated. The results demonstrate that the incorporation of CQDs preserves the intrinsic crystal structure of NiO while significantly improving its interfacial electrochemical properties. Specifically, CQDs reduce the charge-transfer resistance, accelerate electron transport, enhance redox activity and charge storage capability, promote Li + diffusion, and improve electrochemical reaction kinetics. Moreover, the increased proportion of electrochemically active Ni 3+ species enhances the pseudocapacitive behavior of NiO. Benefiting from these synergistic effects, the NiO/CQDs composite film exhibits a 20% increase in optical modulation, 53%/10% faster coloration/bleaching response, and a 28% improvement in cycling stability compared with pristine NiO. Furthermore, the assembled WO 3 -NiO CECD delivers an areal charge capacity of 58.75 mC cm −2 , a coloration efficiency of 157.72 cm 2 C −1 , rapid response times of 2.7 s/1.6 s, and superior cycling stability. This work elucidates the enhancement mechanism of CQDs from the perspectives of electron transport, Ni valence regulation, and ion diffusion kinetics, providing a theoretical basis for the design of high-performance CECDs.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2026
·
IF 8.3
Chen Chen,Sijie Chen,Yu Zhang,Jinhong Liu,Shenghui Xia,Vishal Chaudhary,Praveen Sekhar,Larry Nagahara,Chao Wang,Hui Zhang,Pengfei Cheng,Pradeep Bhadola,Wei Liu,Thomas Thundat,Zhimin Li,Ajit Khosla
Pristine metal oxide gas sensors often suffer from poor selectivity and limited polarizability. The objective of this work is to overcome these bottlenecks by developing an advanced material tailored specifically for highly sensitive and intelligent NO 2 sensing applications. Consequently, oxygen vacancy-rich 2D ultrathin Cs-doped WO 3-x nanosheets were synthesized via a solvothermal method. KPFM, UPS, and TAS confirmed that optimal Cs doping (0.08 mol%) optimizes the surface work function and drastically prolongs the photo-generated carrier lifetime (
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ACS Sensors
·
2023
·
IF 8.9
Siqi Xie,Cheng Zhao,Jiabin Shen,Jing Wei,Haiquan Liu,Yingjie Pan,Yong Zhao,Yongheng Zhu
Listeria monocytogenes, which is abundant in environment, can lead to many kinds of serious illnesses and even death. Nowadays, indirectly detecting the metabolite biomarker of L. monocytogenes, 3-hydroxy-2-butanone, has been verified to be an effective way to evaluate the contamination of L. monocytogenes. However, this detection approach is still limited by sensitivity, selectivity, and ppb-level detection limit. Herein, low-cost and highly sensitive and selective 3-hydroxy-2-butanone sensors have been proposed based on the bimetallic AuPd decorated hierarchical flower-like WO3 nanospheres. Notably, the 1.0 wt % AuPd-WO3 based sensors displayed the highest sensitivity (Ra/Rg = 84 @ 1 ppm) at 250 °C. In addition, the sensors showed outstanding selectivity, rapid response/recovery (8/4 s @ 10 ppm), and low detection limit (100 ppb). Furthermore, the evaluation of L. monocytogenes with high sensitivity and specificity has been achieved using 1.0 wt % AuPd-WO3 based sensors. Such a marvelous sensing performance benefits from the synergistic effect of bimetallic AuPd nanoparticles, which lead to thicker electron depletion layer and increased adsorbed oxygen species. Meanwhile, the unique hierarchical nanostructure of the flower-like WO3 nanospheres benefits the gas-sensing performance. The AuPd-WO3 nanosphere-based sensors exhibit a particular and highly selective method to detect 3-hydroxy-2-butanone, foreseeing a feasible route for the rapid and nondestructive evaluation of foodborne pathogens.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Dongfeng Sun,Min Zhang,Luo Huang,Yanning Qu,Yuan Yu,Beibei Lou,Huayun Du,Bingshe Xu,Kai Wang
One-pot in-situ method was one of crucial industrial techniques to construct heterojunctions , while some intermediate reaction mechanisms of photocatalysts in this procedure were not specific enough. Herein, a new intermediate products driven one-pot in-situ method was investigated for construction of BiOCl/WO 3 that applied in photocatalytic water splitting. According to some characterizations, the hydrochloric acid and water were recognized as important intermediates controlling on growth of BiOCl/WO 3 heterojunction. Under significant effects of Z-scheme structure and internal electric fields, the BiOCl/WO 3 showed enlarged light absorption and enhanced photo-induced carriers separation ability that its O 2 and H 2 evolution rates were improved effectively, in which the optimal photocatalytic O 2 (994.5 µmol/g∙h) and H 2 evolution activity (83.4 µmol/g∙h) were ∼ 2.5 and 4.5 times higher than that of the single BiOCl , respectively. Due to compact interfacial connection between BiOCl and WO 3 after in-situ synthesis, the heterojunction showed a high stability and recyclability for potential industrial applications. We believe that the facile synthetic method was essential for more researches on heterojunction materials and their industrial applications.
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ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Huixiang Wang,Mingxing Tang,Fenglei Shi,Ruimin Ding,Liancheng Wang,Jianbo Wu,Xuekuan Li,Zhong Liu,Baoliang Lv
The oxidative desulfurization (ODS) of fuel oils is of great significance for environmental protection, and the development of efficient ODS heterogeneous catalysts is highly desired. Herein, we have designed and synthesized a novel material of amorphous Cr2WO6-modified WO3 (a-Cr2WO6/WO3) nanowires (3–6 nm) with a large specific surface area of 289.5 m2·g–1 and rich Lewis acid sites. The formation of such a unique nanowire is attributed to the adsorption of Cr3+ cations on non-(001) planes of WO3. In the ODS process, the a-Cr2WO6/WO3 nanowires can efficiently oxidize benzothiophene (BT), dibenzothiophene (DBT), and 4,6-dimethyldibenzothiophene (4,6-DMDBT) to their corresponding sulfones in a quasi-microemulsion reaction system and possess the highest activity (Ea = 55.4 kJ/mol) for DBT: 99.0% of 15,000 ppm DBT with 2600 ppm S can be removed (70 °C, H2O2 as the oxidant). The improvement in ODS activity from most of WO3 catalysts is owing to the sufficient active sites and enhanced adsorption of DBT on the basis of structural features of a-Cr2WO6/WO3 nanowires. Combined with free radical capture experiments, a possible ODS mechanism of W(O2) peroxotungstate route based on surface −OH groups is reasonably proposed. Moreover, the a-Cr2WO6/WO3 nanowires have good stability and can be synthesized on a large scale, suggesting its potential applications as an efficient heterogeneous catalyst.
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JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Zhenting Yuan,Huoshuai Huang,Najun Li,Dongyun Chen,Qingfeng Xu,Hua Li,Jinghui He,Jianmei Lu
Ti 3 C 2 quantum dots (TQDs) derived from ultrathin few-layered Ti 3 C 2 nanosheets were served as the low-cost solid electron mediator of photogenerated carriers at the semiconductor interfaces, which could greatly reserve the reductive and oxidative reaction sites on the surface of heterojunctions and accelerate the reduction and oxidation reactions. The all-solid-state TQDs-bridge WO 3 /TQDs/In 2 S 3 Z-scheme photocatalysts exhibited extremely promoted photocatalytic reduction of Cr (VI) and photocatalytic oxidation of Bisphenol A (BPA) under visible light irradiation, which are 4 and 3 times higher than that of WO 3 /In 2 S 3 heterojunctions, respectively. The favorable photocatalytic activities of WO 3 /TQDs/In 2 S 3 should attribute to the effective electron transfer and charges separation with introduction of TQDs as the electron mediators in the Z-scheme system. In addition, the stability of WO 3 /TQDs/In 2 S 3 was investigated and the possible mechanisms during photo-reduction of Cr (VI) and photo-oxidation of BPA were proposed. This work provides a new strategy for fabrication of all-solid-state Z-scheme heterojunctions using Ti 3 C 2 quantum dots as the low-cost solid electron mediator for efficient environmental remediation.
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NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 8
·3194-3205
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IF 3.288
Jiabin Liu,Bowen Yang,Minghuan Gao,Lisha You,Yuansen Zhang,Zhiying Li,Linna Guo,Tiesheng Li,Penglei Chen,Minghua Liu
A series of novel efficient polyhedron-like WO3/butterfly-like Ag2MoO4 p–n junction photocatalysts (denoted as AMW-x) were designed and synthesized. The exact phase structure, microscopic morphology, electrochemical properties, physical properties and optical properties of the prepared samples were characterized by XRD, SEM, EDS, TEM, HRTEM, UV-DRS, PL, FL, XPS, UPS, BET, MS (Mott–Schottky test), EIS and photocurrent measurements. The photocatalyst could effectively degrade rhodamine B (RhB) under UV/Solar region light illumination. In this system, a p–n junction structure formed by the two different materials effectively enhanced the generation rate of photo-induced electrons and reduced the transfer resistance. These results exhibited that enhanced photocatalytic performance of materials were prepared. The activity of AMW-20 was 548.2/496.8, 57.9/146.1, and 3.7/17 times higher than polyhedron-like WO3, butterfly-like Ag2MoO4, and commercial powder (P25) under UV/Solar region light illumination. The photocatalytic mechanism mode for the improved photocatalytic performance was also proposed.
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LANGMUIR
·
2025
·
IF 3.9
Denghui Huang,Xiaolan Fu,Kaixin Wang,Zicheng Zheng,Liyuan Zhang,Zhizhen Ye,Jie Jiang,Zhong-kang Han,Liping Zhu
Oxygen vacancies play a crucial role in charge transport and surface states in semiconductor metal oxides, significantly influencing various research fields, such as photocatalysis and gas sensor. Developing effective strategies to generate oxygen vacancies and thereby enhance device performance is highly desirable. In this study, we proposed a water-based one-step electrospinning method to introduce hydroxyl groups, leading to the synthesis of Pt-decorated WO3 nanofibers (Pt-WO3(H2O)) with increased oxygen vacancies. Density functional theory calculations revealed that the dissociation energy of W–OH is lower than that of the W–O bonds, promoting the formation of oxygen vacancies via W–OH bond cleavage. These vacancies reduced the adsorption energy of acetone on the WO3 surface, enhancing surface interactions. Consequently, the Pt-WO3(H2O) sensor exhibited an ultrahigh response of 82 to 1.8 ppm acetone at 300 °C, which was about 1 order of magnitude higher than the one fabricated by conventional electrospinning. These findings indicate that water-based electrospinning is an effective technique for generating oxygen vacancies in metal oxide nanofibers. Our high-performance acetone sensor, capable of detecting low concentrations, holds great potential for applications in noninvasive health screening.
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APPLIED CATALYSIS A-GENERAL
·
2024
·
IF 4.7
Sheng-Li Lv,Kuan Wang,Song-Song Li,Xin-Peng Li,Tong-Le Dang,Zhen-Hong He,Huan Wang,Weitao Wang,Yang Yang,Zhao-Tie Liu
Photothermal catalytic oxidation of cyclohexane was found to be an effective and green strategy for the production of cyclohexanol and cyclohexanone (KA oil). However, such strategy existed some obstacles, which hindered its application in the one-step synthesis of adipic acid (AA), necessitating further breakthroughs. Herein, a p-n heterojunction of Fe 8 Ce 2 O x /WO 3 was constructed by a simple combination of solvothermal and impregnation methods, enabling the one-step synthesis of AA via the photothermal cyclohexane oxidation under solvent-free and visible light conditions. Remarkably, the Fe 8 Ce 2 O x /WO 3 nanocomposites exhibited outstanding catalytic performance, achieving a conversion of cyclohexane reached 9.67% with the 92.45% selectivity towards AA (solid, 59.46%) and KA oil (liquid, 32.99%). The Fe 8 Ce 2 O x /WO 3 composites also demonstrated exceptional stability in the production of AA, further highlighting its potential as a catalyst for industrial applications. The exceptional catalytic properties of Fe 8 Ce 2 O x /WO 3 composites can be attributed to the promoted electronic excitation capability, enhanced separation and migration of electron-hole, suppressed charge complexation, broaden visible-light absorption, and effective photo-thermal co-catalytic effects. Furthermore, the Fe 8 Ce 2 O x /WO 3 composites possess a strong adsorption capacity for oxygen and suitable specific surface area, which can be effectively facilitate the interaction between O 2 and cyclohexane, enabling the full utilization of oxygen in the oxidation of cyclohexane to form AA. The proposed approach offers a novel methodology for the design and fabrication of photothermal catalysts to achieve the direct synthesis of AA via the cyclohexane oxidation under solvent-free and visible light conditions in industry.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Weishan Qin,Ting Su,Guodong Chai,Xinhong Wang,Weichao Qin,Hongbin Yu
Photoelectrocatalysis is a promising method for removing biorefractory organic pollutants. However, the inefficient utilization of light and electricity by photoanodes and the failure to effectively execute cathode functions typically lead to poor degradation performance. Therefore, in this study, a photoelectrocatalytic (PEC) system coupled with electro-activated persulfate (E-PS) was constructed using a 3D nanostructured PbO 2 /Sb-SnO 2 //blue-TiO 2 //WO 3 bifacial anode and a Mo-CuFeO 2 -modified carbon felt cathode. The results indicate that the bifacial anode could effectively implement electro-assisted photocatalysis on the irradiating side and electrocatalysis on the back side. This significantly accelerated acetaminophen degradation with a synergy index of 48.98 %. Additionally, the PEC/E-PS system was established by combining a bifacial anode with a persulfate-activated cathode, which promoted the efficient utilization of photogenerated electrons and increased the number of active species in the coupled system. Density functional theory calculations confirmed that Mo tended to dope the Fe sites and promote the adsorption of PS on Mo-CuFeO 2 , facilitating the continuous activation of persulfate. In the coupled system, the contribution order of different active species to acetaminophen degradation was h + > OH > SO 4 − > 1 O 2 > O 2 − . Their mutual conversion enabled the PEC/E-PS system to efficiently remove acetaminophen with a relatively high current efficiency (22.69 %) and low energy consumption (0.06 kWh⋅gCOD −1 ). The proposed PEC/E-PS system is an efficient and sustainable method for treating organic contaminants in wastewater.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yan-nan Wang,Jingfeng Li,Zhiqiang Yang,Zhenyu Yuan,Jin Li,Fanli Meng
In this study, a hollow malposition structure (HMS) optical fiber 2-butanone gas sensor based on double-layer WO 3 @CQDs porous film is proposed, and realizes the ppb detection of 2-butanone gas at room temperature. The HMS can excite the evanescent field and sense the gas adsorption on the fiber surface. The experimental results show sensitivity of 3.09 pm/ppm for this HMS optical fiber gas sensor based on double-layered WO 3 @CQDs porous film, which is 6.05 times higher than that of the sensor coated with single-layer WO 3 @CQDs porous film. In addition, a limit of detection (LOD) reaches 500 ppb. The response time is 11.7 s and the recovery time is 5.72 s. Density functional theory (DFT) results show that the modification of CQDs improves the adsorption capacity of WO 3 @CQDs for 2-butanone gas molecules and changes the refractive index of the material. The sensor has the advantages of small volume, high sensitivity and a low LOD, which is of great significance for the detection of trace 2-butanone gas.
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ENERGY & FUELS
·
2024
·
IF 5.2
Wenbo Jia,Yueyuan Wang,Shaohua Ling,Liren He,Binghe Chen,Songtao Liu,Chuanmin Chen,Yue Cao
Fast selective catalytic reduction (SCR) atmosphere can significantly improve the NOx removal activity of VWTi catalysts, while the catalytic performance and reaction pathway of Hg0 oxidation in a fast SCR atmosphere are still unclear. In this paper, the catalytic activity of simultaneous NOx removal and Hg0 oxidation over VWTi catalysts in a simulated fast SCR atmosphere was investigated for the first time. The results showed that VWTi catalysts possessed a wide NOx removal active temperature window and a high Hg0 oxidation activity in a fast SCR atmosphere. The X-ray photoelectron spectroscopy (XPS) and Hg temperature-programmed desorption (Hg-TPD) methods were used to investigate the Hg0 oxidation process over VWTi catalysts in a fast SCR atmosphere. Combined with the homogeneous Hg0 oxidation experiment results, two domination reaction routes of Hg0 oxidation over VWTi catalysts in a fast SCR atmosphere were proposed. One was that the adsorbed Hg0 could react with the surface active species to form HgO. The other reaction route was a gaseous homogeneous route that the gaseous Hg0 could be oxidized directly to Hg(NO3)2 by gaseous NO2. Particularly, the gaseous homogeneous Hg0 oxidation process could notably weaken the inhibition effect of NH3 on Hg0 oxidation, thus improving the Hg0 oxidation activity of VWTi catalysts in a fast SCR atmosphere.
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