NEW JOURNAL OF CHEMISTRY
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2025
·
IF 2.5
Sujing Zou,Xu Lu,Xiqiang Mao,Lei Wu,Jun Li,Shaoyi Li,Jian Yang,Ximei Fan
In photocatalysis, the construction of double Z-type heterojunction can effectively improve the photogenerated carrier separation efficiency, enhance the light absorption capacity and improve the photocatalytic reaction rate. Herein, a series of TiO2/KWO/BiOBr photocatalysts are successfully synthesized via hydrothermal and electrostatic self-assembly method. All the samples are investigated and characterized by X-ray diffraction, Scanning electron microscopy, Ultraviolet–visible spectroscopy and X-ray photoelectron spectroscopy to insight into the microstructures and optical properties. During the photocatalytic degradation of toluene experiments, the optimized TiO2/KWO/BiOBr sample exhibits the excellent photocatalytic performance. Under the irradiation of xenon lamp for 120 min, degradation rate of toluene reaches 95%, which is 10.75, 7.12 and 7.41 times higher than that of TiO2, KWO and BiOBr, respectively. The UV–vis diffuse reflectance, electrochemical impedance spectroscopy and transient photocurrent response of the TiO2/KWO/BiOBr photocatalyst verify that the enhanced photocatalytic activity is ascribed to its expanded light absorption range and the efficient separation efficiency of photogenerated carriers. In addition, the degradation experiments of toluene are also carried out in different atmospheres which could control the formation of different free radicals. It shows that superoxide anions and hydroxyl radicals play critical roles in the toluene degradation. The corresponding photocatalytic degradation mechanism is proposed that the excellent photocatalytic activity is attributed to providing more active sites and strong oxidation capacity for toluene.
研究领域:
材料科学
·
环境科学
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
·
IF 5.4
Niu Niu,Ying Zhang,Dong Sun,Jialong Zhang,Chuqi Zhang,Xiumin Li,Weiliang Tian,Feng Gao
The interfacial state of electrode materials critically governs catalytic analyte detection. This study introduces single-atom platinum (Pt) decorated tungsten trioxide (Pt-WO 3 ) nanomaterials for the ultrasensitive electrochemical detection of luteolin, a pharmacologically significant flavonoid. The atomic dispersion of Pt within the WO 3 lattice, achieved via oxygen vacancy anchoring, optimizes the interfacial state and catalytic performance, overcoming Pt nanoparticle agglomeration limitations. The optimized Pt-WO 3 modified electrode demonstrates exceptional performance with an ultra-low detection limit (0.13 nM), superior sensitivity (10.1 μA μM −1 ), and a broad linear range (0.0001–5.6 μM). Systematic mechanistic studies reveal a two-electron/double-proton reaction pathway for luteolin oxidation, with Pt single atoms synergistically accelerating interfacial electron transfer. The sensor exhibits outstanding selectivity, long-term stability, and reproducibility. Successful application in detecting luteolin in complex matrices (apple juice, lemon juice) validates its practical utility. This work highlights the significant potential of single-atom synergistic catalysis in advancing electrochemical sensor performance for pharmaceutical analysis and functional food quality control.
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高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2026
·
IF 2.8
Zhang Fan,Zhang Jinshun,Li Xu,Wang Qingji
Polyaniline (PANI) is regarded as a prospective sensing material for room-temperature NH 3 detection owing to its high sensitivity and selectivity. In this study, WO 3 nanoflowers were prepared via a simple chemical bath deposition method, and PANI/WO 3 heterojunctions were subsequently fabricated through an in situ polymerization process. To evaluate the contribution of the heterojunction to gas-sensing performance, four sensors with different composite ratios were constructed. Among them, the optimized PW1-2 sensor exhibits a response of 3.8–100 ppm NH 3 at room temperature, which is 1.6 times higher than that of pure PANI. Notably, it achieves an ultrafast response time of only 26 s, representing an 8.8-fold improvement over pure PANI (230 s), along with near-complete desorption capability. Furthermore, PW1-2 demonstrates excellent humidity resistance, with stable responses ranging from 3.7 to 3.97 under 40–80% relative humidity. Comprehensive characterization by x-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy TEM, x-ray photoelectron spectroscopy (XPS), Raman spectroscopy, thermogravimetric analysis (TGA), and Brunauer–Emmett–Teller (BET) analysis reveals that PANI nanofibers uniformly wrap around WO 3 nanoflowers, forming p–n heterojunctions at the interface. XPS analysis shows that PW1-2 possesses the highest protonation degree (51.88%), which correlates with its superior sensing performance. Unlike conventional PANI/WO 3 composites, the enhanced performance is not primarily attributed to specific surface area or porosity but rather to the synergistic effect of morphological characteristics and heterojunction formation. Compared with previously reported PANI/WO 3 sensors, our PW1-2 sensor offers significantly faster response, better humidity tolerance, and complete desorption. This work provides a promising strategy for designing high-performance, humidity-resistant room-temperature NH 3 sensors. Graphical
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高影响因子
CHEMICAL GEOLOGY
·
2019
·
IF 3.618
Xiaolin Wang,Ye Qiu,Jianjun Lu,I-Ming Chou,Wenlan Zhang,Guanglai Li,Wenxuan Hu,Zhen Li,Richen Zhong
Knowledge on hydrothermal tungsten (W) species is vital towards a better understanding of tungsten transport and mineralization mechanisms. In this study, in situ Raman spectra of a 0.005 – 0.1 mol/kg ( m ) K 2 WO 4 solution containing CO 2 , HCl, and NaHCO 3 were collected at 50–400 °C and 20–60 MPa. The spectra for the symmetric stretching vibration mode of the W O bond, v 1 (W O), were analyzed to investigate the hydrothermal tungstate species. Results showed that carbonate/bicarbonate do not associate with tungstate to form carbonic tungstate species. Nevertheless, the presence of CO 2 can increase the fluid acidity, which favors the formation of polymeric tungstate species at <300 °C. Above about 300 °C, monomeric tungstates (e.g., WO 4 2- , HWO 4 -, H 2 WO 4 and alkali tungstate ion pairs) are responsible for the hydrothermal transport of tungsten, and the v 1 (W O) modes of these species are centered at ∼930 cm -1 and 950 cm -1 . Based on the above observations, we simulated the mineralization process in the context of fluid-rock interactions using tungstate and alkali tungstate ion pairs as the only aqueous W species. The thermodynamic simulations showed that (a) the timing of mineralization mainly depends on the W concentration in the initial mineralizing fluid and the availability of Ca 2+ , Fe 2+ and Mn 2+ , with higher W concentrations generally favoring higher temperature mineralization; (b) highly W-enriched fluid is not essential for W mineralization, while extremely low contents of Fe, Mn and Ca in the magma are useful to maintain the mobility of aqueous W until favorable host rocks are encountered; and (c) a “hydrogen reservoir” effect was identified for dissolved CO 2 . The presence of CO 2 can promote the extraction of Fe(II) from the pelitic host rocks, thereby facilitating a high-grade vein-type W mineralization. At <∼300 °C, polytungstate species, whose v 1 (W O) modes are centered at ∼965 – 995 cm -1 , are important hydrothermal W species along with monomeric tungstates. Therefore, polymeric tungstate species should be considered in future thermodynamic modeling of W transport and mineralization at <300 °C. An increase in fluid pH induced by CO 2 -escape and/or fluid-rock interactions will destabilize the polymeric tungstates to form WO 4 2- and other monomeric tungstate, which interacts with metal cations to form wolframite and/or scheelite.
研究领域:
地球化学
·
矿物学
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DOI
高影响因子
GEOFLUIDS
·
2020
·
IF 1.534
Xiaolin Wang,Ye Qiu,I-Ming Chou,Rongqing Zhang,Guanglai Li,Richen Zhong
In situ Raman spectra of aqueous K2WO4-HCl, K2WO4-HCl-NaCl, and K2WO4-CO2-NaCl solutions were collected at elevated temperature (, 100–400°C) and constant pressure () of 30 MPa. The stretching vibration band of the W=O bond () was analyzed to reveal the species of tungsten (W) responsible for the hydrothermal transport of W during mineralization. Results showed that monomeric tungstates with (W=O) bands at ~930 and 950 cm-1 are the dominant W species in weakly alkaline (room temperature, ) to near-neutral (room temperature, ) solutions under the investigated conditions. Overall, the stability of polymeric tungstate species with (W=O) bands at ~965–995 cm-1 decreases with rising temperature and was not detected at ≥300°C in moderately acidic solution (room temperature, ). However, increased fluid acidity and salinity obviously enlarged the temperature stability field of polymeric tungstate species. In highly acidic solution (room temperature, ), polymeric tungstates are the only stable W species even at 400°C. In the presence of 1.9 mol/kg NaCl, polymeric tungstate(s) can persist to at least 350°C in moderately acidic solution. Considering that 300–350°C is the major W-mineralizing range and W-mineralizing fluid is generally characterized by a moderately acidic nature, we propose that, in addition to monomeric tungstates, polymeric tungstates can also be important W species in some natural geological fluids that are responsible for the mineralization of W. Future studies of the W mineralization mechanism should take this issue into account.
研究领域:
地球化学
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矿物学
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DOI
高影响因子
PLoS One
·
2014
·Vol. 9
·期 6
·e100743
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IF 3.534
Zhanwei Ma,Wenyan Wang,Ying Wu,Yiming He,Tinghua Wu
Low molecular water-soluble chitosan was prepared by the depolymerization of chitosan in the presence of a series of catalysts with active W(O 2 ) sites. Both the peroxo species [W 2 O 3 (O 2 ) 4 ] 2- and {PO 4 [WO(O 2 ) 2 ] 4 } 3- showed high efficiency in the degradation of chitosan, indicating that the degradation mechanism did not follow the radical mechanism. That means •OH is not the active species, which has been proven by the fluorescence spectra. H 2 O 2 acted as an oxidant to regenerate the active W(O 2 ) sites in the depolymerization of chitosan. The developed catalyst (TBA) 3 {PO 4 [WO(O 2 ) 2 ] 4 } is recoverable.
研究领域:
生物化学
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材料科学
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DOI
PubMed
高影响因子
Science Advances
·
2022
·Vol. 8
·期 18
·
IF 14.957
Xinyu Wang,Jicong Zhang,Ke Li,Bolin An,Yanyi Wang,Chao Zhong
There is an increasing trend of combining living cells with inorganic semiconductors to construct semi-artificial photosynthesis systems. Creating a robust and benign bio-abiotic interface is key to the success of such solar-to-chemical conversions but often faces a variety of challenges, including biocompatibility and the susceptibility of cell membrane to high-energy damage arising from direct interfacial contact. Here, we report living mineralized biofilms as an ultrastable and biocompatible bio-abiotic interface to implement single enzyme to whole-cell photocatalytic applications. These photocatalyst-mineralized biofilms exhibited efficient photoelectrical responses and were further exploited for diverse photocatalytic reaction systems including a whole-cell photocatalytic CO2 reduction system enabled by the same biofilm-producing strain. Segregated from the extracellularly mineralized semiconductors, the bacteria remained alive even after 5 cycles of photocatalytic NADH regeneration reactions, and the biofilms could be easily regenerated. Our work thus demonstrates the construction of biocompatible interfaces using biofilm matrices and establishes proof of concept for future sustainable photocatalytic applications.
研究领域:
生物技术
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材料科学
·
环境科学
·
光化学
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）