SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Xiaoxue Liu,Ailin Gao,Tao Dong,Jiaming Li,Jian Liu,Changchao Jia
The photocatalytic reduction of CO 2 and H 2 O to form formic acid (HCOOH) holds promise for meeting the carbon–neutral target. However, the reduced efficiency of carrier separation and the material’s vulnerability to photo-corrosion significantly impede its practical application. Herein, a 0D/1D Cu 2 O/W 18 O 49 S-scheme heterostructure is prepared by in situ growing Cu 2 O nanocrystals on W 18 O 49 ultrathin nanorods via the wet chemistry method. In situ irradiation X-ray photoelectron spectroscopy characterization uncovered the formation of a stable internal electric field (IEF) at the heterojunction interface between W 18 O 49 and Cu 2 O, which facilitates the separation of photon-generated carriers through an effective interfacial S-scheme transmission mechanism. Small-sized Cu 2 O (5–10 nm) anchored on the ultrathin W 18 O 49 nanorods exposes abundant active sites and enhances carrier separation while inducing electrons generated from W 18 O 49 to consume the holes in Cu 2 O, thus preventing the oxidation of Cu 2 O. The W 18 O 49 /Cu 2 O S-scheme heterostructure with the optimized composite ratio (40 % Cu:W) exhibited excellent performance in HCOOH production (56.42 μmol g −1 h −1 , 23.2-fold enhancement compared to pristine Cu 2 O) and 100 % selectivity for CO 2 photoreduction in water without any sacrificial reagents. This work provides a rational method for improving the stability of the catalyst and regulating charge carrier migration for highly selective CO 2 photoreduction in water.
研究领域:
材料科学
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环境科学
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化学工程
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DOI
高影响因子
Inorganic Chemistry Frontiers
·
2021
·Vol. 8
·期 14
·3566-3575
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IF 6.569
Libo Wang,Mohan Li,Qiu Zhang,Fengyan Li,Lin Xu
Global warming has caused us to seek a sensible strategy to replace the energy consumption of the Haber–Bosch approach in manufacturing ammonia. NH3 is utilized in agriculture to produce fertilizer to gratify the rapid increase of human food demand. Herein, we report the construction of a heterojunction that adopted g-C3N5 and Fe3+-doped W18O49 (Fe-W18O49) for photocatalytic nitrogen fixation for the first time. The surface of g-C3N5 was porous and fluffy, and its band gap energy was relatively narrow, which could adjust the absorption range of the hybrid and improve the utilization efficiency of light energy. Fe-W18O49 nanowires were rich in oxygen vacancies (OVs) that provided sufficient active sites for nitrogen adsorption and activation. The generated complex had excellent electron and hole separation ability, and the photogenerated carriers were successfully distributed to two different substances, which significantly elevated the nitrogen fixation capacity of the catalyst. The formation rate of ammonia reached 131.6 μmol g−1 h−1 when Fe-W18O49/g-C3N5 was employed as the catalyst for nitrogen fixation, which was obviously enhanced as compared with pure g-C3N5 or Fe-W18O49. This has provided the possibility to construct an inexpensive nitrogen fixation catalyst with outstanding catalytic properties.
研究领域:
材料科学
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环境科学
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化学工程
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DOI
高影响因子
Advanced Science
·
2025
·Vol. 12
·期 36
·e16805
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IF 14.1
Xiaoqing Sui,Weijing Yao,Jingyi Chen,Shilong Han,Dai Yang,Jingyang Li,Kaixi Wang,Wenzhuo Wu,Hongxing Pei,Qingyong Tian,Qun Xu
Light-driven materials have attracted great interest for their promising applications in next-generation smart devices. The incorporation of various photothermal materials into polymers has been developed for endowing composites with the capability of light harvesting and photothermal conversion, and management. However, their opaque appearance, vulnerability, and challenging processability limit their practical applications. Herein, it is successfully synthesized a series of versatile transparent films (PUMW) that combine photothermal self-healing function and mechanical strength through integrating polyurethane (PU) self-healing polymers with plasmonic enhanced MXene and W 18 O 49 hybrids (MXene@W 18 O 49 ). The resulting comprehensive film (PUMW4) maintained a visible-light transmittance of over 79% in 0.2 mm thickness, and could rapidly reach 102 °C within 5 min under light irradiation of 0.45 W cm −2 . Furthermore, it demonstrated a favorable ability for photothermal self-healing, with surface scratches disappearing in 2 min. Besides, the tensile strength of PUMW4 significantly increased from 22.7 to 30.7 MPa, in comparison with PUMW0 (pure PU). The proof of concept for an indoor thermal insulation test demonstrates that the organic glass house model covered with the film exhibited a temperature reduction of 10 °C compared to the naked model, highlighting the potential of as-prepared PUMW films in energy-saving applications for large-scale out-door buildings.
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DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Tongyao Liu,Sitong Chen,Wei Jiang,Xudong Zhang,Xia Zhang,Xiaogang Zhang,Mingwei Shao,Riming Hu,Xuchuan Jiang
Rational regulation of the migration and separation of photogenerated charge carriers is a pivotal strategy for optimizing photocatalytic activity. To maximize the potential of piezoelectric and plasmonic properties, W 18 O 49 /BaTiO 3 heterostructures were fabricated via a straightforward solvothermal process. As anticipated, the W 18 O 49 /BaTiO 3 heterostructures demonstrated a significantly enhanced piezo-photocatalytic degradation of tetracycline under ultraviolet, visible, and near-infrared light irradiation combined with ultrasound stimulation, outperforming both bare BaTiO 3 and W 18 O 49 . In-depth investigations indicate that the remarkable piezo-photocatalytic performance of the W 18 O 49 /BaTiO 3 heterostructures arises from their exceptional photon energy harvesting across the ultraviolet (UV) to near infrared (NIR) spectrum driven by the localized surface plasmon resonance effect of W 18 O 49 , as well as the enhanced charge-carrier separation facilitated by the polarized electric field of BaTiO 3 and the built-in electric field of the heterojunction. Consequently, the hybrid W 18 O 49 /BaTiO 3 heterostructure, which exploits synergistic piezoelectric and plasmonic effects, demonstrates great potential for antibiotic pollutant treatment.
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 23
·10939-10946
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IF 9.931
Yuhong Chang,Zhenguang Wang,Yu-e Shi,Xicheng Ma,Long Ma,Yuqiang Zhang,Jinhua Zhan
Solar steam generation is a promising application for utilizing exhaustless solar energy for steam generation, desalination, sterilization, and water treatment. Over the past several decades, scientists have made many attempts to design rational structures to promote evaporation efficiency including optimizing optical absorption, photothermal conversion, heat localization, and water transportation. Here, an efficient solar steam generation device was fabricated through decorating a nonstoichiometric W18O49 mesocrystal, as a solar light-to-heat material, onto a hydrophilic PTFE membrane. Nonstoichiometric W18O49 mesocrystals were incorporated into the membrane, and confirmed by the XRD, SEM, TEM, and XPS characterizations, which can transfer light to heat after absorbing sunlight and lead to water evaporation on a local area of a membrane. The structure of the solar steam generation device was confirmed by the results of SEM and contact angle measurements, which insured the solar steam generation device self-floated on top of water, thereby providing a continuous water supply to the local area heated by the W18O49 mesocrystals from bulk water. Under one sun illumination, the evaporated water mass loss reached 1.13 kg m−2 for a membrane thickness of M/A = 9.83 g m−2 after 1 h irradiation, and the membrane showed a high efficiency of 80.7%. Limit of water evaporation rate for the W18O49@PDMS mesocrystal membrane was further calculated to be 1.15 kg m−2 after 1 h one-sun irradiation, with a limit of efficiency of 82.0%. The salinities of simulated seawater reduced to levels far below the World Health Organization's (WHO) standard after desalination. The rational design enhancing evaporation performance also provides enlightenment for further practical applications of solar steam generation technology.
研究领域:
材料科学
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能源技术
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环境科学
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DOI
高影响因子
CERAMICS INTERNATIONAL
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2019
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IF 3.45
Rui Wang,Jun Shen,Wenjing Zhang,Qinqin Liu,Mingyi Zhang,Zulfiqar,Hua Tang
Artificial Z-scheme heterostructure photocatalysts , inspired by the natural photosynthesis, have been explored for water contamination owing to the efficiency of charge carriers separation and enhanced redox capacity. Herein, a novel step-scheme TiO 2 /W 18 O 49 heterojunction integrating TiO 2 nanosheets and spindle-like W 18 O 49 was prepared via a two-step solvothermal method. The TiO 2 /W 18 O 49 heterojunction with the optimum ratio exhibited excellent photodegradation of RhB higher by a factor of 2.26 and TC degradation higher by a factor of 3.32 than the pristine TiO 2 when exposed to visible light. The reactive free radical trapping experiment indicated •O 2 − was determined to the dominant reactive species. Furthermore, XPS analysis and •O 2 − quantification measurements confirmed a build-in electric field induced step-scheme structure in TiO 2 /W 18 O 49 composites, which effectively enhanced the separation of carriers, thus improved photocatalytic activity. The present study will offer a new perception related to the formation of step-scheme heterostructure for photocatalytic degradation.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
NANO
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2019
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IF 1.293
Jianhua Ge,Jing Xu,Yujie Liu,Long Zhang,Lan Wang,Dehan Wu
Nitrogen photo fixation mediated by various photocatalysts has received extensive concerns in recent years. In this work, a general strategy is proposed to enhance nitrogen photo fixation performance with some W 1 8 O 4 9 -based photocatalysts under visible-light irradiation. A series of photocatalysts were successfully synthesized in the presence of some noble-metal-free transition metals (Fe, Co and Ni) to modify the urchin-like W 1 8 O 4 9 . The resulting photocatalysts were systematically characterized using XRD, SEM, EDS, XPS, PL, N 2 adsorption–desorption isotherms, and DRS. Structural characterization of the photocatalysts revealed that the crystal morphology features were preserved, optional harvesting properties were enhanced, BET specific surface area was extended, and migration efficiency of the photo-induced charge carriers was significantly improved in the modified-W 1 8 O 4 9 materials. Therefore, a progressed nitrogen photo fixation performance was observed. The maximum production of NH 4 + was approximately reached to 2752 μ g ⋅ g − 1 catal. under the optimum reaction conditions. Furthermore, a plausible nitrogen photo fixation mechanism in the presence of the synthesized composites is also proposed.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
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IF 6.3
Chuhan Huang,Yu Ma,Qian Cheng,Xiaohan Liu,Hongman Sun,Fazle Subhan,Xinyuan Zhao,Youhe Wang,Zifeng Yan
The fundamental insights into the reaction mechanism, especially the electron transfer mechanism, are highly promising yet challenging for W 18 O 49 /g-C 3 N 4 heterojunction catalysts during photocatalytic nitrogen fixation. Herein, the 1D/2D nanostructured S-scheme heterojunctions were designed by in situ growth of 1D W 18 O 49 nanowires on 2D g-C 3 N 4 nanosheets through solvothermal method using methanol as solvent. In situ XPS analysis revealed that electrons in the conduction band of W 18 O 49 recombine with holes in the valence band of g-C 3 N 4 under the conduction effect of internal electric field, band bending, and Coulombic attraction in the W 18 O 49 /g-C 3 N 4 heterojunction. The photogenerated electrons are retained in g-C 3 N 4 , where the negative reduction potential of its conduction band enhances the activation of N 2 . As a result, the ammonia generation rate employing the optimal W 18 O 49 /g-C 3 N 4 heterojunction is 64.8 μmol g cat −1 h −1 , approximately double that of W 18 O 49 alone and 2.3 times higher than that of g-C 3 N 4 . The enhanced activity and facile methodology make the current material exceedingly appealing for implementation in photocatalytic nitrogen fixation for the synthesis of ammonia.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2022
·
IF 6.371
Ya Xiong,Teng Liu,Xinyu Wang,Wendi Liu,Yanjun Xue,Xiaoli Zhang,Can Xiong,Jian Tian
Ultrathin CdS nanosheets (NSs) are intriguing in photocatalytic hydrogen evolution . Severe photo-corrosion and rapid recombination of electrons and holes, however, impair their applications. To solve this problem, a novel step-scheme (S-scheme) 2D CdS/W 18 O 49 heterostructure with strong interfacial interactions and large contact interface has been successfully designed. Due to the ultrathin structure of CdS, defect-rich W 18 O 49 NSs-assembled network, unique 2D heterostructure and state-of-the-art S-scheme mode, 40 wt% CdS/W 18 O 49 (CW40) shows a prominent photocatalytic H 2 production rate of 15.4 mmol g −1 h −1 . Besides, the apparent quantum efficiency of CW40 is up to 15.4 % under light at λ = 370 nm. Besides, the as-prepared CW40 can protect CdS from photo-corrosion, exhibiting outstanding stability over 24 h circular reaction. Our work provides an out-of-box solution to broaden the application potential of certain catalysts with inherent drawbacks and offers fresh insight into the design and preparation of highly-efficient 2D heterostructures for versatile applications.
研究领域:
材料科学
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能源化学
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DOI
高影响因子
RSC Advances
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2016
·Vol. 6
·期 18
·15234-15239
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IF 3.289
Weikun Zhang,Chong Lin,Shan Cong,Junyu Hou,Bin Liu,Fengxia Geng,Jian Jin,Minghong Wu,Zhigang Zhao
Li–S batteries are regarded as one of the most promising energy-storage devices due to their high theoretical energy density, five times higher than that of lithium-ion batteries (2600 vs. ∼500 W h kg−1). However, the polysulfide shuttle effect is the primary challenge for future applications of Li–S batteries. Herein, a novel barrier layer material, nonstoichiometric W18O49 nanowires, is reported to alleviate the undesirable shuttle effect, thereby largely boosting the specific capacity and cyclability of Li–S batteries. Without particular cathode design, the introduction of W18O49 nanowires enables the commercially available micro-sized sulfur cathode with 70% sulfur loading to deliver a respectable initial discharge capacity of 1142 mA h g−1 and retain a specific capacity of about 809 mA h g−1 after 50 cycles, even at a current density of 0.5 A g−1. To the best of our knowledge, such a capacity fading for Li–S batteries based on high loading of commercial micro-sized sulfur has been rarely reported.
研究领域:
材料科学
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能源存储技术
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DOI
高影响因子
Biomaterials Advances
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2022
·
IF 0
Zhihuan Zhao,Shasha Yang,Pengfei Yang,Jianying Lin,Jimin Fan,Bing Zhang
W 18 O 49 -mediated photothermal therapy (PTT) is affected by the easily oxidized property and its direct exposure to physiological environment can cause biological events, which limit its development in the biomedical field. Herein, a composite nanoparticle PVP-W 18 O 49 @C (PW@C), with significant antioxidant and excellent biocompatibility, was constructed to overcome the limitations of W 18 O 49 in the medical field. Oxygen-deficient W 18 O 49 , with irregular defect structure , was combined with hollow carbon nanospheres treated by reflux to obtain W 18 O 49 @C (W@C) similar to sea urchins. Compared with W 18 O 49 , W@C shows stronger antioxidant properties, and it still has the ability to convert light energy to heat energy after 6 months. In addition, polyvinyl pyrrolidone is coated on the surface of W@C to construct PW@C, which significantly improves biocompatibility of W@C. The photothermal conversion efficiency of PW@C was 42.9 ± 1.3. PWD (PW@C loaded with DOX·HCl) showed controllable drug release behavior under pH and NIR stimulation, and the drug release rate reached 69.1 ± 1.6% at pH = 5.0. Notably, PWD was readily absorbed by cells through clathrin/caveolae-mediated internalization channels, and the viability of HeLa cells treated with PWD + NIR was only 21.5 ± 1.0%. Through photothermal, drug delivery/release and cytotoxicity evaluation, PWD was proved to be an effective platform for chemo-/photothermal combinational tumor therapy.
研究领域:
纳米医学
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肿瘤学
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生物材料
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产品关联
DOI
PubMed
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Jing Li,Mingkun Wu,Rui Tu,Jiacheng Li,Keliang Wang,Ju Guo,Yi Xie
The limited narrow spectral absorption and rapid recombination of photogenerated carriers in photocatalytic materials result in inefficient molecular oxygen activation and insufficient generation of reactive oxygen species (ROS), severely restricting the degradation efficiency of organic pollutants. Herein, a composite catalyst with broad visible-light responsiveness was fabricated via a facile solvothermal and room-temperature stirring strategy, where sheet-like Bi 4 O 5 Br 2 was encapsulated with W 18 O 49 nanowires. The as-prepared catalyst exhibited high concentrations of h + and O 2 − active species, achieving a 92 % degradation rate of ciprofloxacin (20 mg/L) within 60 min, alongside exceptional environmental tolerance and stability. Experimental and computational investigations confirmed the S-scheme charge transfer mechanism, which enhances carrier separation while preserving electrons and holes with strong redox capabilities. The localized surface plasmon resonance (LSPR) effect of W 18 O 49 synergistically promoted hot electrons and photogenerated electrons to activate O 2 , generating abundant O 2 − . This work proposes a novel design paradigm for efficient and stable visible-light photocatalysts, advancing solutions to emerging antibiotic pollutants in aquatic systems.
研究领域:
环境科学
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材料科学
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光催化
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纳米技术
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化学工程
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）