Asia-Pacific Journal of Chemical Engineering
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2024
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IF 1.4
Jianke Tang,Qiaoling Li,Rongqian Meng,Yanfeng Xue,Shengjian Zhang,Shengjuan Shao
Using the prepared Ag 3 PO 4 /WO 3 ·H 2 O composite as the matrix, AgI nanoparticles were introduced onto the surface of Ag 3 PO 4 to construct AgI/Ag 3 PO 4 /WO 3 ·H 2 O ternary heterojunction photocatalysts. The ternary composite photocatalysts exhibited higher photocatalytic degradation activities for rhodamine B (RhB) and tetracycline hydrochloride (TCH) than those of binary Ag 3 PO 4 /WO 3 ·H 2 O and AgI/WO 3 ·H 2 O photocatalysts and individual AgI, Ag 3 PO 4 , and WO 3 ·H 2 O photocatalysts. After exposure to visible light for 12 and 24 min, the removal efficiencies of RhB and TCH by the S2-50% photocatalyst (50% molar percentage of AgI to Ag 3 PO 4 ) reached 98.0% and 85.3%, respectively. After four degradation cycles, the removal efficiency of RhB by S2-50% remained at 93.2%, significantly surpassing that of the Ag 3 PO 4 /WO 3 ·H 2 O photocatalyst. The enhanced photocatalytic performance of the AgI/Ag 3 PO 4 /WO 3 ·H 2 O photocatalyst is primarily attributed to the formation of Z-scheme/conventional Type II heterojunctions, which facilitate spatial separation of the photogenerated electrons and holes while maintaining the strong reductive capabilities of electrons in the AgI conduction band.
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
CERAMICS INTERNATIONAL
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2024
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IF 5.1
Haiding Zhong,Zhiao Han,Jinde Ling,Genglu Li,Yinyu Chen,Zhen Wang,Changhong Wang,De Li,Xiaoyu Wang
The development of electrochromic materials with high optical modulation and good cycling stability is a key focus in dual-band electrochromism. Hydrated tungsten oxide exhibits dynamic and independent control over the near-infrared and visible transmittance within the solar spectrum, garnering widespread attention in electrochromic applications. However, its optical modulation and cycling stability need further enhancement due to limited ion diffusion kinetics. Herein, a simple photo-deposition method is developed for synthesizing mesoporous WO 3 ·H 2 O films, characterized by high porosity and large surface area, which facilitates ion and electron transport within the films. Experimental results show that mesoporous WO 3 ·H 2 O can achieve three functional modes under different voltages: “bright”, “cold”, and “dark”. Compared to WO 3 ·H 2 O nanoplates, mesoporous WO 3 ·H 2 O electrode enables a superior dual-band electrochromic performance, including high optical modulation (74.1 % at 700 nm and 65.9 % at 1150 nm), rapid response times (13.5 s for coloring and 11.5 s for bleaching), high coloring efficiencies (138.9 cm 2 /C), and excellent cycling stability (optical modulation retention rate of 88.2 % after 1000 cycles). This research provides a novel approach to enhancing dual-band electrochromic performance through the incorporation of mesoporosity in materials.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
Materials Today Communications
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2024
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IF 3.7
Ligang Ma,Yuqing Yang,Tianyu Zhu,Yihuan Ding,Chao Lin,Le Xu,Xiaoqian Ai
In this paper, hexagonal ZnIn 2 S 4 nanoflowers were grown in situ on tetragonal WO 3 ·H 2 O nanosheets, yielding a compact ZnIn 2 S 4 @WO 3 ·H 2 O (ZIS@WO) core-shell heterojunction. The formation of the ZIS@WO heterojunction was optimized by meticulously adjusting the quantity of WO 3 ·H 2 O nanosheets incorporated. The crystal structure and microstructure of ZIS@WO were comprehensively examined using XRD, TEM and EDS analyses. The photocatalytic properties of ZIS@WO heterojunctions were evaluated through the degradation of organic pollutants under visible light irradiation. The results demonstrated a marked enhancement in photocatalytic efficiency for the ZIS@WO heterojunction. Further investigation into the separation and transport of photogenerated carriers were performed using PL spectroscopy and photoelectrochemical measurement. Compared to the individual components of ZnIn 2 S 4 nanoflowers and WO 3 ·H 2 O nanosheets, the ZIS@WO heterojunction creates an internal electric field at the interface, along with a compact core-shell configuration. This internal electric field, in conjunction with the band structure of the heterojunction, effectively accelerates the separation of photogenerated electrons and holes. Additionally, a comprehensive analysis of the photocatalytic degradation mechanisms were presented, elucidating the intricate processes.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2016
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IF 5.31
Xin Xiao,Huan Zhong,Chunxia Zheng,Mingli Lu,Xiaoxi Zuo,Junmin Nan
Novel flower-like WO 3 ·H 2 O micro/nano-architectures are conveniently synthesized via a low-temperature oil bath route, and its catalytic oxidative desulfurization (ODS) activity for dibenzothiophene (DBT) in a model oil is systematically evaluated within an n-octane/acetonitrile (MeCN) biphasic system in the presence of H 2 O 2 as an oxidizing reagent. The results indicate that DBT can be effectively removed using the as-synthesized WO 3 ·H 2 O catalyst in the presence of H 2 O 2 and that the catalytic process follows pseudo-first-order kinetics. Under optimal conditions, i.e., n(S/catalyst) = 5 and n(H 2 O 2 /S) = 8 at 70 °C, the sulfur content is diminished from 4000 to approximately 220 μg g −1 after 60 min of reaction. The mechanistic study reveals that the desulfurization route is dominated by direct catalytic oxidation rather than indirect oxidation by radicals. The oxidation product is dibenzothiophene sulfone (DBTO 2 ) with almost 100% selectivity, and it can quickly migrate into the MeCN phase due to its highly polar nature, resulting in the removal of DBT from the oil phase. By combining the experimental results with the theoretical DFT calculations, the crystal structure of WO 3 ·H 2 O and the electronic structures of DBT vs. DBTO 2 are considered to be the key roles in this synchronized adsorption-catalytic oxidation-extraction process. In addition, the as-synthesized WO 3 ·H 2 O is structural stable during the reaction and can be also used to remove 4,6-dimethyldibenzo-thiophene (DMDBT), benzothiophene (BT), and thiophene (Th) in fuel oils, suggesting its potential for practical applications.
研究领域:
化学工程
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催化材料科学
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
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2017
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IF 3.387
Tao Xu,Yun Wang,Xiaofang Zhou,Xiaoli Zheng,Qun Xu,Zhimin Chen,Yumei Ren,Bo Yan
The recombination of photo-induced charges is one of the main issues to limit the large-scale applications in photocatalysis and photoelectrocatalysis. To improve the charge separation, we fabricate a novel type II 2D ultrathin TiO 2 /WO 3 ·H 2 O heterostructures with the assistance of supercritical CO 2 (SC CO 2 ) in this work. The as-fabricated heterostructures possess high photocatalytic activity for the degradation of methyl orange(MO) and high photocurrent response under simulated solar light (AM 1.5). For the TiO 2 /WO 3 ·H 2 O heterostructures, the MO solution could be degraded by 95.5% in 150 min, and the photocurrent density reaches to 6.5 μA cm −2 , exhibiting a significant enhancement compared with pure TiO 2 and WO 3 ·H 2 O nanosheets .
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
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2021
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IF 4.094
Cao Cheng,Hongyan Zhang,Fan Li,Shuguo Yu,Yan Chen
In this study, a gas sensor based on TiO 2 /WO 3 ·H 2 O (TW) heterojunction with high sensitivity, excellent selectivity and long-term stability for ammonia (NH 3 ) detection was successfully prepared by hydrothermal method . Compared with WO 3 ·H 2 O and TiO 2 , TW heterojunction shows excellent selective to NH 3 and the response varies by 3 orders of magnitude to 500 ppm NH 3 at room temperature (RT, 25 ± 3 °C). The lowest response limit of TW is 0.5 ppm and the response/recovery time is 2.35 s/1.95 s. The main reason for improving the performance of TW heterojunction to NH 3 detection is that TiO 2 nanoparticles cause more oxygen free radicals on the surface of TW heterojunction, which can react with more NH 3 molecules to release more electrons. Therefore, heterojunction structure increases the electrons and reduces the width of electron depletion layer in TW gas sensor. In addition, TW heterojunction has small and uniform particle size which can provide more active sites for the reaction between NH 3 and oxygen free radicals to release more electrons. This work provides a heterojunction structure composed of TiO 2 and WO 3 ·H 2 O to effectively improve the performance of sensor for NH 3 detection at RT, which is beneficial to the development of high-performance gas sensors.
研究领域:
材料科学
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化学工程
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传感技术
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
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2022
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IF 7.968
Longfei Zhao,Xin Chen,Yuan Zhang,Zhupeng Ye,Yanwei Zeng
In this paper, controllable nucleation and growth of CdS nanodots on the (020)-featured WO 3 ·H 2 O nanoplates has been successfully accomplished to prepare CdS-WO 3 ·H 2 O heterojunction with high-quality interfacial contact through a slow release of Cd 2+ and S 2- from the gradual self-loop hydrolysis of cadmium acetate and thioacetamide. The chemical and structural characteristics of as-prepared samples before and after heat treatment are detailedly investigated by TG-DSC, XRD, Raman, XPS, FESEM and HRTEM, as well as their light absorption performance from UV-Vis DRS. The maximum average hydrogen production rate for CdS-WO 3 ·H 2 O reaches 2.15 mmol·g −1 ·h −1 under 300 W Xe lamp irradiation (λ > 420 nm) using lactic acid as sacrificial reagent, which is 8.27 and 2.72 times as much as CdS and CdS-WO 3 , respectively. According to band alignment, CdS-WO 3 ·H 2 O exhibits greater energy difference of Fermi level than CdS-WO 3 , and augmented photocatalytic performance should arise from efficient Z-scheme charge transfer mechanism under stronger built-in electric field, in which the conduction band electrons of WO 3 ·H 2 O and valence band holes of CdS are expected to effectively recombine at their interfacial zones, while the conduction band electrons of CdS and valence band holes of WO 3 ·H 2 O contribute to the reduction of H + and oxidation of lactic acid.
研究领域:
材料科学
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化学工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2022
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IF 6.371
Yongxin Jiao,Shu Wang,Yupu Liu,Xin Li,Wenlong Yang,Shuang Han,Hui Zhang,Jiuxing Jiang
The artificial-photosynthetic semiconductor composites have attracted tremendous attention with respect to their enhanced photocatalytic properties. Herein, we reported the facile synthesis of Zn 0.5 Cd 0.5 S/WO 3 ·H 2 O S-scheme photocatalyst via one-pot in situ hydrothermal strategy. Density Functional Theory (DFT) calculation was employed to reveal the S-scheme photogenerated electron transfer mechanism, and the subsequent experimental characterization further illustrated the path for electron-hole transfer and separation under the effect of S-scheme heterojunction. The mass of WO 3 ·H 2 O accounted for Zn 0.5 Cd 0.5 S/WO 3 ·H 2 O 48 wt% (ZCSW48) was the best high-efficiency S-scheme photocatalyst displayed significant photocatalytic properties on pollution degradation, in detail, with the Cr (VI) photoreduction rate of 2.27 μmol·s −1 ·g −1 cat. and the Rhodamine B (RhB) photooxidation rate of 0.38 μmol·min −1 ·g −1 cat. , respectively. The designed Zn 0.5 Cd 0.5 S/WO 3 ·H 2 O photocatalysts have integrated with the three aspects of photocatalytic efficiencies including the visible light response, prolonged photogenerated carrier lifetime and the sufficient surface active sites due to amount of surface defects , therefore, this work provides more insights into the utilization of green energy for environmental treatment by artificial structured semiconductors.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
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2021
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IF 2.495
Jianke Tang,Rongqian Meng,Yanfeng Xue,Shengjian Zhang,Qiaoling Li
A novel Ag 3 PO 4 /WO 3 ·H 2 O composite was prepared by loading Ag 3 PO 4 on WO 3 ·H 2 O substrate via a two-step hydrothermal method and characterized by various analytical techniques. The photocatalytic performance was evaluated by the degradation of methylene blue (MB) and oxytetracycline (OTC) under visible light irradiation. Within 30 min, 98.9 % MB can be degraded by the Ag 3 PO 4 /WO 3 ·H 2 O composite with a molar ratio of 3:1 (3Ag/1W), which is higher than that of individual Ag 3 PO 4 and WO 3 ·H 2 O. The 3Ag/1W photocatalyst also exhibits improved photocatalytic activity for OTC degradation than pure WO 3 ·H 2 O and Ag 3 PO 4 . The improvement of photocatalytic activity would be mainly ascribed to the highly efficient separation of photo-induced electron-hole pairs due to matched band structure, as confirmed by photoluminescence spectra (PL) and photocurrent responses test. According to the experimental results of radical trapping and electron spin resonance (ESR), a possible photocatalytic mechanism of the Ag 3 PO 4 /WO 3 ·H 2 O composite was proposed.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CATALYSIS
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2019
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IF 7.723
Renshan Wang,Ganhua Qiu,Yi Xiao,Xueqin Tao,Wen Peng,Benxia Li
In this work, an all-solid-state Z-scheme photocatalyst of WO 3 ·H 2 O/Pd/CdS ternary heterostructures was constructed by introducing a small amount of Pd into the optimized WO 3 ·H 2 O/CdS binary system, where Pd nanoparticles (NPs) were sandwiched between WO 3 ·H 2 O nanosheets and CdS NPs. The WO 3 ·H 2 O/Pd/CdS ternary heterostructures exhibited remarkably enhanced photocatalysis towards the oxidative coupling of benzylamines to imines, compared with the other photocatalysts of WO 3 ·H 2 O, CdS, WO 3 ·H 2 O/CdS, WO 3 ·H 2 O/Pd, and WO 3 ·H 2 O/CdS/Pd. The wavelength-dependent photocatalysis of WO 3 ·H 2 O/Pd/CdS is in good agreement with its light-harvesting intensity at the corresponding wavelengths. The photoelectrochemical results reflected the enhanced charge carrier separation in WO 3 ·H 2 O/Pd/CdS, and the photocatalytic H 2 evolution confirmed the highly efficient Z-scheme charge transfer in this ternary photocatalyst. Therefore, the WO 3 ·H 2 O/Pd/CdS ternary heterostructures possess distinct advantages of extended light harvesting region, spatial separation of electron and holes, and elevated redox power, which synergistically contribute to the superior photocatalysis. The Pd NPs sandwiched between WO 3 ·H 2 O and CdS acted as not only an electron mediator to facilitate the interfacial charge separation but also a cocatalyst to accelerate the selective oxidation of benzylamine. This work demonstrates a rational design of highly efficient Z-scheme photocatalysts and presents some revelations about the photocatalytic mechanism for selective organic transformations.
研究领域:
光催化
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材料科学
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化学工程
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有机化学
✓ 已验证
产品关联
DOI
高影响因子
Surfaces and Interfaces
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2022
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IF 6.137
Rumin Ma,Jingpeng Li,Shenjie Han,Zaixing Wu,Yongjie Bao,Sheng He,Yuhe Chen
In this study, different morphologies of WO 3 ⋅H 2 O/TiO 2 (WT) heterojunction films were successfully synthesized on bamboo biotemplate via facile two-step hydrothermal deposition methods. The WO 3 ·H 2 O self-assembled by nanosheets or nanoplates on anatase TiO 2 -coated bamboo (TiO 2 -B) exhibited a distinctive surface color. The addition of WO 3 ·H 2 O could significantly extend the optical responses of TiO 2 -B in the ultraviolet to the visible region. Based on the various analysis techniques, the formation mechanisms of the WO 3 ·H 2 O hierarchical architectures with different crystal structures were also proposed. In addition, the photoactivity and post illumination activity of WT films were examined by constructing ·O 2 ˉ and ·OH in light and in light-off, respectively. The results showed that WT films with different crystal structures exhibited different photoactivity and energy storage abilities, and the photoactivity of WT films was negatively correlated with their energy storage ability. The presence of an anatase TiO 2 thin film on the bamboo surface provided abundant active sites for WO 3 ·H 2 O growth, which formed direct S-scheme heterojunctions for solar energy conversion and storage. Therefore, we anticipate that solar-driven energy storage heterojunctions with accessible and rich crystal morphologies will provide new insights for various applications, such as efficient wastewater treatment , self-cleaning coating, and air purification.
研究领域:
材料科学
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环境科学
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纳米技术
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能量存储
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光化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）