INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2022
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IF 7.139
Haixia Qian,Lihong Cao,Shunde Liao,Shenghui Xie,Xinbo Xiong,Jizhao Zou
Designing cost-effective photocatalysts with remarkable performance is a foresighted strategy to foster the evolution of H 2 in water splitting. In this study, a p-n heterojunction FeWO 4 /Mn 0.5 Cd 0.5 S photocatalyst modified by low-cost and non-toxic FeWO 4 was synthesized using hydrothermal and calcination methods. The hydrogen evolution activity of Mn 0.5 Cd 0.5 S was strengthened by varying the amount of FeWO 4 loading. The hydrogen production rate of FeWO 4 /Mn 0.5 Cd 0.5 S photocatalyst loaded with 10% FeWO 4 can reach 9.63 mmol g −1 h −1 , which is equivalent to 2.16 times of pure Mn 0.5 Cd 0.5 S. The enhancement of the H 2 evolution activity was primarily contributed to a p-n heterojunction formed at the interface of FeWO 4 and Mn 0.5 Cd 0.5 S. It provides a fast pathway for the migration and separation of photogenerated charges and effectively inhibits the photo-corrosion of Mn 0.5 Cd 0.5 S.
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
WATER AIR AND SOIL POLLUTION
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2019
·Vol. 230
·期 4
·1-13
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IF 1.774
Liu Yong,Wang Gui,Yang Wenning,Yang Jie,Li Jia
Biotemplating method is a promising way to obtain hierarchical materials with unique morphology and property. In the current work, a novel hierarchically porous ZnAl-CLDH (calcined layered double hydroxides)/FeWO 4 had been successfully synthesized by a facile biotemplated method. The obtained samples were characterized in detail via FESEM-EDX, TEM, XRD, IR, TGA, and BET techniques. The as-synthesized ZnAl-CLDH/FeWO 4 hierarchical microspheres were composed of ZnAl-CLDH nanosheets and FeWO 4 nanoparticles. The obtained sample exhibited both high adsorption and visible-light photocatalytic activity toward Congo Red (CR) in water. It was found that the adsorption process was well described by the pseudo-second-order kinetic model and the Langmuir isotherm model, while the photocatalytic degradation process was well fitted to the first-order kinetics model. The enhanced photocatalytic performance was mainly due to the hierarchically porous structure that could offer more exposed active sites, as well as the unique energy band structure of heterostructures, that facilitated the efficient separation and transfer of photoinduced carriers and enhanced light harvesting. In addition, the as-prepared sample had quickly magnetic response and could be easily separated from water under an external magnetic field after wastewater treatment.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
Journal of Cleaner Production
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2023
·
IF 11.1
Yajuan Li,Qiongfang Wang,Xin Zhang,Lei Dong,Min Zhang,Pinhua Rao,Naiyun Gao,Yangang Sun,Jing Deng
This work successfully synthesized magnetic FeWO 4 /Cu 2 S through a facile method with efficient peroxymonosulfate (PMS) activation to eliminate sulfachloropyridazine (SCP) in water, in which 97.56% of SCP was removed in 30 min with activating only 0.2 mM PMS . Factors such as calcination temperature, the addition amount of WS 2 in FeWO 4 /Cu 2 S, molar ratio of Cu/Fe in FeWO 4 /Cu 2 S, catalyst dosage, solution pH, inorganic anions and natural organic matters（NOM）were investigated. It was found that in FeWO 4 /Cu 2 S at 1:2 possessed the best catalytic performance for PMS. FeWO 4 /Cu 2 S performed well in a wide pH range (3–9) and the effect was better under acidic conditions. A high catalyst dosage could supply more catalytic active sites for PMS activation and encourage the production of reactive oxygen species . Anions (HCO 3 − and HPO 4 2− ) and NOM significantly inhibited SCP degradation, whereas Cl − had only a tiny inhibitory impact. In addition, H 2 PO 4 − and NO 3 − demonstrated duality in the degradation of SCP. The oxidation process was dominated by non free radical oxidation by 1 O 2 rather than free radicals oxidation by HO⋅ and SO 4 •− . Three SCP degradation pathways—SO 2 extrusion, S-N bond cleavage and hydroxylation were proposed according to intermediate products analysis. The mechanism was found that the introduction of W improved the dual metals cycles of Fe 3+ /Fe 2+ and Cu + /Cu 2+ which could efficiently promote PMS activation. In addition, the magnetic FeWO 4 /Cu 2 S was easy to separate after reaction, which had great application potential in the water treatment .
研究领域:
环境科学
·
催化化学
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2024
·
IF 8
Li Chen,Jing Geng,Renhui Gao,Qianqian Xu,Zheng Guo
Metal oxide-based gas sensors encounter challenges in effectively detecting hazardous benzenes due to their stability and structural similarities. Here we report an innovative in situ growth method for synthesizing Fe 2 O 3 /Si-FeWO 4 heterostructure nanotubes (NTs) using highly negatively charged multivacant lacunary TBA 4 H 6 [SiW 9 O 34 ]·2H 2 O ( α -SiW 9 ) and Fe 3+ as precursors. A two-step process involving electrospinning followed by a thermal oxidation method was employed to synthesize a series of the uniform Si-FeWO 4 decorated Fe 2 O 3 heterostructure NTs. Considering the rich Fe 2 O 3 /Si-FeWO 4 active interfaces, rapid electron transfer, and high specific surface area, the optimal Fe 2 O 3 /Si-FeWO 4 based sensors demonstrate significantly higher sensitivity (S = 27.5) towards 50 ppm m-xylene in comparison to pristine Fe 2 O 3 (S = 1.8). Furthermore, the Fe 2 O 3 /Si-FeWO 4 exhibits excellent stability, humidity resistance, and high selectivity for m-xylene. This work offers an efficient, cost-effective strategy to synthesize Fe 2 O 3 /Si-FeWO 4 heterostructure NTs, with prospects for synthesizing other advanced sensing heterostructure nanomaterials with lacunary polyoxometalates as precursors.
研究领域:
材料科学
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传感器技术
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环境监测
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DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
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2024
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IF 4
Hanlu Zeng,Yunlan Xu,Dengjie Zhong,Qingmei Qiao,Yuqin Yang
The performance of a photocatalytic fuel cell (PFC) depends on its photoelectrode. In this work, a novel three-dimensional flower-like hierarchical photoanode Zn Zr MOF/FeWO 4 /BiOBr/Ti was synthesized, characterized and applied in PFC to degrade rhodamine B and generate electricity simultaneously. The characterization results of XRD, SEM, EDS, FI-IR, DRS, and XPS show that the photoanode was successfully prepared. The loading of FeWO 4 and Zn Zr MOF widened the nanosheet spacing of BiOBr, which enhanced the light absorption intensity, broadened the light absorption band edge from 467.6 nm to 490.2 nm, and increased the photocurrent density from 0.0149 mA/cm 2 to 0.156 mA/cm 2 . The maximum photocurrent density, maximum power density, degradation rate , and FF of the PFC with the prepared photoanode were respectively 0.256 mA·cm −2 , 22.65 μW·cm −2 90.48 % (1 h), and 0.216, which were far higher than those of PFCs with mono and binary photoanodes. The strong photocatalytic performance of the photoanode is attributed to the type II heterojunction formed between BiOBr and FeWO 4 , which helps to separate electron-hole pairs. The main reactive materials responsible for degrading rhodamine B are h + and ·O 2 - . This research provides a new idea for developing an efficient visible light response photoanode.
研究领域:
材料科学
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环境科学
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能源科学
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DOI
高影响因子
Science China-Chemistry
·
2023
·
IF 9.6
Tang Xianqing,Chen Jinghuang,Zhang Mengqian,Sun Jian,Yang Xiurong
Alkaline phosphatase (ALP) activity and pyrophosphate ion (PPi) levels are remarkable for the human body functions such as signal transduction pathways and metabolism. Current quantitative methods mainly focus on developing complicated organic substrates or employing unstable metal ions as signal-regulated medium. Herein, we have developed a facile hydrothermal method for preparing FeWO 4 nanomaterials with intrinsic peroxidase-like activity and further confirmed that such a catalytic activity could be significantly enhanced by adjusting the size and oxygen vacancy content. More encouragingly, PPi can easily inhibit the catalytic activity of FeWO 4 , whereas orthophosphate ions (Pi) cannot. Therefore, we constructed an FeWO 4 -based colorimetric assay for sensing PPi by means of the classical 3,3′,5,5′-tetramethylbenzidine-peroxidase chromogenic reaction. A facile and reliable ALP activity assay was also designed and developed because of the logical regulation of the peroxidase-like activity of FeWO 4 through the ALP-catalyzed hydrolysis of PPi into Pi. Based on the clear mechanism and mimetic-enzyme FeWO 4 -catalyzed amplification, the sensing system exhibited excellent performance and was able to evaluate ALP activity in real serum samples and screen for potential ALP inhibitors. The proposed mimetic enzyme-involved colorimetric assay provides an alternative pathway, and FeWO 4 nanomaterials with excellent performance have great potential for further biosensing and biomedical applications.
研究领域:
纳米技术
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生物化学
·
催化
·
分析化学
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DOI
高影响因子
Advanced Healthcare Materials
·
2023
·
IF 10
Zhuoran Yang,Chunyu Yang,Dan Yang,Ye Zhang,Qingzhu Yang,Fengyu Qu,Wei Guo
Ferroptosis has recently attracted much attention as an anti-tumor therapy. Evidence suggests that ferroptosis can induce oxidative stress and accumulation of lethal lipid peroxides in cancer cells, leading to cell damage. However, unsuitable pH, H 2 O 2 levels, and high glutathione (GSH) expression in the tumor microenvironment hinder the development of ferroptosis-mediated therapy. In this study, an l -arginine ( l -arg)-modified CoWO 4 /FeWO 4 (CFW) S-scheme heterojunction is strategically designed and constructed for ultrasound (US)-triggered sonodynamic- and gas therapy-induced ferroptosis. CFW not only has excellent Fenton-catalytic activity, outstanding GSH consumption capacity, and excellent ability to overcome tumor hypoxia, but its S-scheme heterostructure can also avoid the rapid combination of electron (e) and hole (h + ) pairs, thereby enhancing the sonodynamic effects. As a precursor of nitric oxide (NO), l -arg is modified on the surface of CFW (CFW@ l -arg) to achieve controlled NO release under US irradiation, thereby enhancing ferroptosis. In addition, poly(allylamine hydrochloride) is further modified on the surface of CFW@ l -arg to stabilize l -arg and achieve controllable NO release. Both in vitro and in vivo results demonstrate that such a multifunctional therapeutic nanoplatform can achieve high therapeutic efficacy through sonodynamic and gas therapy-enhanced ferroptosis. This designed oncotherapy nanoplatform provides new inspiration for ferroptosis-mediated therapy.
研究领域:
癌症治疗
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纳米技术
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材料科学
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肿瘤学
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
CHEMOSPHERE
·
2025
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IF 8.1
Qianying Zong,Xiaofei Niu,Xin Cheng,Yifan Liu,Cong Liu,Tingyue Shi,Jiapeng Liu,Xiaohong Yang,Wentao Wang,Zikuan Guo,Fengjuan Xiao
Nanoscale FeWO 4 /BiVO 4 heterojunctions were directly grown on the graphite fiber felt (GF) with good conductivity to construct a FeWO 4 /BiVO 4 @GF solar photo-Fenton like wastewater treatment system. The removal effect of COD from phenolic wastewater and the mechanism of synergistic improvement of wastewater treatment efficiency by this system were investigated. The FeWO 4 /BiVO 4 heterojunction prepared by hydrothermal method exhibited higher photoelectric conversion efficiency and solar light utilization rate, thus endowing FeWO 4 /BiVO 4 with excellent solar-Fenton like reaction activity.The photo-Fenton activity can be maintained well even within the pH range of 2–8. Loading FeWO 4 /BiVO 4 nano-heterojunction on GF helped to increase the contact area between Fenton reagents and wastewater, facilitate the electron transfer on the FeWO 4 /BiVO 4 heterojunction and enable the recovery and reuse of the Fenton reagents.Under solar light radiation, the COD removal efficiency of FeWO 4 /BiVO 4 @GF/H 2 O 2 system in phenolic wastewater was more than 92%. Even after five cycles, the system still exhibited excellent operation stability. FeWO 4 /BiVO 4 @GF promoted the conversion and cycling of Fe(III)/Fe(II) by accelerating the separation and transport of photogenerated electrons/holes and increasing the concentration of active species, thereby stimulating excellent solar photo-Fenton like activity.The results are significance to the development of green and efficient photo-Fenton process for advanced treatment of industrial wastewater.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Qingqing Chai,Jiahan Dong,Xiaofang Yu,Xiaoke Zhang,Jun Li,Sheng Guo,Yiling Yang
Photocatalytic oxalic acid (OA) activation for pharmaceutical wastewater degradation based on Fe-based catalysts are usually limited by the cycle of Fe 3+ /Fe 2+ and low conversion efficiency of OA. Herein, an effective OA activator, FeOOH loaded FeWO 4 /WO 3 (FFW) heterojunction photocatalyst, were fabricated by electrostatic self-assembly for tetracycline (TC) degradation. Experimental results revealed that the introduction of FeOOH can greatly enhance the optical absorption and separation efficiency of photogenerated carriers of the FeWO 4 /WO 3 (FW) composite. Moreover, optimized FFW heterojunction exhibited the excellent photocatalytic OA activation activity and the highest OA conversion rate for TC degradation, which exhibited 97.3% photocatalytic performance for TC within 30 min under 420 nm light irradiation. The FFW heterojunction still revealed high photocatalytic OA activation activity for TC degradation even after six cycles. The possible degradation pathway of TC and photocatalytic OA activation mechanism of FFW heterojunction were also presented by ESR spectroscopy results, quenching tests, and LC-MS analysis. This work not only provides a fresh perspective on the surface photo-Fenton chemistry of catalytic redox processes, but also presents a valid reference for designing highly efficient photocatalytic OA-activation systems for pharmaceutical wastewater treatment .
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
Nano Energy
·
2025
·
IF 17.1
Yuchen Pan,Qi Qi,Xinfei Wu,Yuwei Xiong,Huihua Min,Lei Li,Litao Sun,Feng Xu
Transition metal tungstates (TMTs) are gaining attraction in lithium-ion batteries (LIBs) anode research, primarily attributed to their superior volumetric capacity, good electronic transport property, and stable electrochemical cycling. However, the fundamental phase evolution pathways during lithiation of TMTs largely remain ambiguous owing to the lack of direct evidence. Herein, ferrous tungstate (FeWO 4 ) is strategically selected as a characteristic TMT anode material to investigate the time-resolved structural evolution and reaction kinetics during lithiation. Previously unexplored two-step conversion reaction mechanism during the lithiation of FeWO 4 is explicitly revealed by coupling in situ transmission electron microscopy (TEM) with synchronized electron diffraction (ED) observation. Impressively, the single-crystal Li 2 WO 4 is identified as the intermediate phase by in situ lattice-resolution imaging and density functional theory (DFT) calculation. Upon further Li + intercalation, the lattice spacing of Li 2 WO 4 progressively expands along with distortion and cracking of ordered lattice fringes, ultimately resulting in full conversion of Li 2 WO 4 into Fe, W and Li 2 O phases. The final delithiation products can be recovered to the FeWO 4 phase and therefore reversible phase conversion reactions can be maintained with cycling. The in situ TEM observations not only decipher the whole lithiation process of the FeWO 4 anode, but more importantly establishes a general mechanistic framework for understanding the Li storage mechanism of other TMT anodes.
研究领域:
材料科学
·
电化学
·
纳米科技
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能源存储
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固态物理
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计算材料学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
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IF 12.5
Kaiyue Cai,Rongfu Huang,Dazhen Li,Baicang Liu,Igor Ying Zhang
Efficient and sustainable degradation of antibiotic pollutants remains a major challenge in electrochemical advanced oxidation processes. Here, we report a tungstate-assisted electro-Fenton strategy that enables rapid removal of sulfamethoxazole (SMX) at near-neutral pH, in which the oxidant is generated in situ from dissolve oxygen to drive the electro-Fenton process without the need for external oxidants. Sodium tungstate (Na 2 WO 4 ), serving as both electrolyte and redox co-catalyst, facilitates homogeneous Fe 2+ /Fe 3+ cycling and in situ hydrogen peroxide generation, while also inducing the formation of a conformal FeWO 4 interfacial layer on the iron anode. Kinetic studies show a pseudo-first-order rate constant of 0.1560 min −1 , representing more than a 14-fold enhancement over conventional Na 2 SO 4 electrolyte. Comprehensive characterization using scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), and Nyquist plots have indicated the dynamic nucleation of the FeWO 4 layer. Results of electron paramagnetic resonance (EPR) spectroscopy combined with radical scavenging tests revealed that the layer promotes surface-bound hydroxyl radical (•OH) generation, while suppressing iron dissolution and sludge formation. Additionally, UPLC-QTOF-MS/MS analysis identified key SMX degradation intermediates, confirming both homogeneous and interfacial oxidation pathways. Notably, Raman spectroscopy analysis detected the formation of peroxotungstate species (e.g., WO 2 (O 2 ) 2 2− ), indicating tungstate's participation in redox-mediated radical generation. Therefore, the co-designed electrolyte-electrode system integrates bulk-phase catalysis and interface-directed activation, achieving high degradation efficiency while reducing pollutant toxicity. This work offers a modular strategy for electrolyte-guided interfacial engineering and presents a practical design paradigm for electrochemical removal of sulfonamide antibiotics and similar micropollutants.
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
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IF 15.1
Xueying Wang,Qian Ma,Yi Wang,Dongheng Zhao,Lingyu Li,Huayushuo Zhang,Bolong Li
This study originally reports the in-situ construction of porous WO 3 /FeWO 4 ribbon-like hierarchical composites with unique and intense heterojunction interface behavior and the enhanced adsorption and carrier transport capability for effectively detecting n-butanol at room temperature. The introduction of different adding amounts of MIL-101 plays the key role of the morphological evolution of WO 3 -based microstructures with the well-distributed nanoparticles in situ growth on the surface by a facile electrospinning and subsequent calcination process. Compared with pristine WO 3 , a sharp and useful reduction of the optimal operating temperature from 220 to 25 °C can be observed as the Fe component increasing, mainly owing to the inverted p-type gas sensitive response caused by the controllable variable of FeWO 4 phase in the multiple effective WO 3 -FeWO 4 heterojunctions . The optimal WO 3 /FeWO 4 composites can display the highest response of 12.3 and a relatively short response/recovery times of 110/140 s to 100 ppm n-butanol at 25 °C, together with the superior gas selectivity, repeatability, humidity and long-term stability. Density functional theory (DFT) simulation is employed for verifying the significant adsorption interaction and charge transfer between n-butanol molecule and WO 3 /FeWO 4 . Regular distribution of WO 3 -FeWO 4 heterojunction interfaces can not only determine the collaborative modulation of electronic structures, but also provide the efficient surface/interface transport mechanism for MIL-101 induced one-dimensional (1D) hierarchical ribbons. Actually, the integrated gas-sensitive components based on WO 3 /FeWO 4 composites exhibit the rapid response characteristic under room temperature condition and provide a friendly strategy of optimizing the practical detection of ppm-level n-butanol for other inorganic heterogeneous sensors.
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DOI
高影响因子
危险品化学品经营许可证（带存储）