ACS Applied Materials & Interfaces
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2018
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IF 8.097
Ling Chen,Shujie Wang,Dongdong Li,Yan Fang,Huaibin Shen,Linsong Li,Zuliang Du
Even though chemically stable metal oxides (MOs), as substitutes for poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS), have been successfully adopted for improving device stability in solution-processed quantum dot light-emitting diodes (QLEDs), the efficiencies of QLEDs are at a relatively low level. In this work, a novel architecture of QLEDs has been introduced, in which inorganic/organic bilayer hole injection layers (HILs) were delicately designed by inserting an amorphous WO3 interlayer between PEDOT:PSS and the indium tin oxide anode. As a result, the efficiency and operational lifetime of QLEDs were improved simultaneously. The results show that the novel architecture QLEDs relative to conventional PEDOT:PSS-based QLEDs have an enhanced external quantum efficiency by a factor of 50%, increasing from 8.31 to 12.47%, meanwhile exhibit a relatively long operational lifetime (12 551 h) and high maximum brightness (>40 000 cd m–2) resulting from a better pathway for hole injection with staircase energy-level alignment of the HILs and reduction of surface roughness. Our results demonstrate that the novel architecture QLEDs using bilayer MO/PEDOT:PSS HILs can achieve long operational lifetime without sacrificing efficiency.
研究领域:
光电子学
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材料科学
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纳米技术
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半导体器件
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2023
·
IF 15.1
Yuying Yang,Mengmeng Sun,Zhuoyuan Chen,Hengyue Xu,Xiaohui Wang,Jizhou Duan,Baorong Hou
Solar energy-driven photoinduced cathodic protection (PICP) technology utilizes solar energy to protect marine metallic structures against severe marine corrosion. To enhance the solar energy utilization and strengthen dark-state application for realizing long-term protection, herein, a 3D nanothorn cluster-like WO 3 /ZnO/Zn-Bi 2 S 3 multijunction with electron-storage characteristic and adjustable energy band was constructed. It exhibited an enhanced continuous release of photogenerated electron and sustained cathodic protection in dark conditions. Exposed to only 100 s of simulated sunlight irradiation, the WO 3 /ZnO/Zn-Bi 2 S 3 could store 5.27×10 −2 C electrons and provide up to 5460 s of sustained CP for the coupled metal after light stops, which was 10.8 and 3.5 times higher than those of WO 3 /ZnO (4.89×10 −3 C) and WO 3 /Zn-Bi 2 S 3 (1.51×10 −2 C), respectively. The WO 3 nanothorn cluster-like substrate with reversible valence transformation of W 6+ /W 5+ together with the large surface area and one-dimensional transmission path can store photogenerated electrons under illumination and release photogenerated electrons after light stops efficiently. Notably, the tri-phase heterojunction with introduction of intermediate “Carrier Springboard” ZnO between WO 3 and Zn-Bi 2 S 3 contributed to the building of well-matched energy band gradient to strengthen the directional backward transfer of photogenerated electrons and holes. The energy band of Bi 2 S 3 sensitizer was adjusted towards negative direction by doping with zinc element to boost PICP application performance. The reversible valence transformation of Bi 3+ /Bi 5+ could promote the consumption of photogenerated holes. These synergistically enhanced the sustained PICP performance of the WO 3 /ZnO/Zn-Bi 2 S 3 photoelectrode both in dark and light conditions. This design shed light on energy-storage photoelectrodes for long-term PICP of metallic materials.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
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IF 5.518
Yongkun Lun,Shuting Hu,Fuming Chen,Qinyu He,Yinzhen Wang,Wei Li,Guannan He
In this work, an S-scheme heterojunction-structured composite, g-C 3 N 4 /Mo-doped WO 3 (mass ratio 100:5, labeled 5M15WOCN) together with pure WO 3 , g-C 3 N 4 , and Mo-doped WO 3 (labeled M15WO) was prepared. The as-prepared samples were characterized by XRD , UV–Vis DRS, SEM, TEM, ESR , EIS , PL and XPS . The photocatalytic properties were investigated by photodegrading methyl orange (MO). The following findings were obtained. The dopant Mo increased the amount of O v -s and produced W 5+ , along with prolonging the lifetime of photogenerated carriers, improving the transfer ability of carriers. The S-scheme heterojunction g-C 3 N 4 /M15WO drastically improved the photocatalytic properties, dominantly due to the synergetic effect of the O v -s, S-scheme mechanism and very negative CB potential. A new phenomenon is found in which W 6+ can combine with the net electrons coming from the side with a higher Fermi level in the heterojunction and form W 5+ , suggesting a good method for stabilizing the high valence state for the material by combining one with a lower Fermi level. This work also implies that, compared to the S-scheme, a more negative CB is much more beneficial for MO photodegradation .
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CHEMICAL ENGINEERING JOURNAL
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2020
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IF 10.652
Xi Tao,Poyueh Pan,Taobo Huang,Long Chen,Haodong Ji,Juanjuan Qi,Fengbin Sun,Wen Liu
Sulfachloropyridazine (SCP) was commonly used as a broad-spectrum sulfonamide antibiotic and hard to be removed through traditional sewage treatment process. In this study, we developed a simple and controllable strategy to realize in-situ construction of Co(OH) 2 nanoparticles decorated urchin-like WO 3 (Co(OH) 2 /WO 3 ), which could efficiently remove SCP through peroxymonosulfate (PMS) activation. Some tiny nanoparticles of Co(OH) 2 decorated on the spines/nanorods or surfaces of urchin-like WO 3 by transmission electron microscopy (TEM) analysis. The obtained 10 wt% Co(OH) 2 /WO 3 realized completely removal of SCP (degradation efficiency 100%) with a high reaction rate constant ( k 1 ) of 0.88 min −1 within 3 min at optimal pH 7. That was because the urchin-like WO 3 with numerous adsorption functional groups on its surface ( e.g. , W = O and –OH bonds) could adsorb the Co 2+ easily to form CoOH + , which was perceived the rate-limiting step for PMS activation and generating radicals. Radical quenching experiments indicated that SO 4 •− played a more significant role than HO • radicals. Density functional theory (DFT) calculation revealed that the atoms of SCP with high Fukui index ( f − ) were active sites, which preferred to be attacked by the electrophilic SO 4 •− and HO • radicals. The toxicity of the intermediates by SCP degradation was evaluated by quantitative structure–activity relationship (QSAR) prediction through Toxicity Estimation Software Tool (T.E.S.T.). The possible degradation pathway and catalytic mechanism for SCP removal were proposed. Considering the good catalytic properties of Co(OH) 2 /WO 3 -PMS, the material will show great application potential in the removal of emerging contaminants in water.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2016
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IF 8.328
Jing Ding,Lu Zhang,Qianqian Liu,Wei-Lin Dai,Guofeng Guan
Novel visible-light-driven plasmonic photocatalyst Ag/WO 3 -110 nanorods with the dominant {001} exposed facets were prepared via a two-step hydrothermal treatment and in-situ photoreduction reaction. The as-prepared samples were characterized by various analytical techniques, such as X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy, UV–vis diffuse reflectance spectroscopy, photoluminescence spectra and electrochemical impedance spectroscopy. The results illustrated that the intrinsic nature of charge separation on the {001} facets of WO 3 -110 nanorods as well as the surface plasmon resonance (SPR) effect of Ag nanoparticles (Ag NPs) can facilitate the charge transfer between Ag NPs and the {001} facets of WO 3 -110 nanorods. Moreover, the size of Ag NPs also plays an important role in the SPR effect and the photogenerated carrier separation. Those Ag NPs loaded on {001} facets of WO 3 nanorods exhibit size-dependent photocatalytic activity for the MO and RhB degradation. Additionally, the underlying photocatalytic reaction mechanism was further investigated by the photoelectrochemical experiment and the controlled experiments using radical scavengers.
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Catalysts
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2025
·Vol. 15
·期 3
·230
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IF 4
Zhao Wang,Jawad Ali,Ajmal Shahzad,Yanan Chen,Haiqing Ma,Qiao Huang,Lei Xie,Futang Xing
Fe-based heterogeneous catalytic advanced oxidation processes show great potential for treating wastewater. However, catalyst instability often hinders their practical use, mainly due to the slow regeneration of Fe2+sites. Herein, we developed a Fe3S4/WO3catalyst, where the electron-rich Wx and Sx sites promoted efficient electron transfer, enabling continuous regeneration of Fe2+active sites on the catalyst surface. The Fe3S4/WO3catalyst exhibited outstanding degradation efficiency for tetracycline (TC) in the peroxymonosulfate (PMS) system, achieving a 92.5% removal efficiency, significantly higher than its individual components of Fe3S4(52.8%), WO3(43.1%), and WS2(53.2%). Moreover, the Fe3S4/WO3/PMS system demonstrated a broad operational pH range (3.0–9.0), excellent degradation efficiency for various emerging pollutants, minimal interference from background electrolytes and organic matter, and strong stability in real water treatment. Chemical scavenger tests and electron paramagnetic resonance (EPR) analysis confirmed that the oxidative degradation of TC was driven by multiple reactive species, including SO4•−,•OH,•O2−, and1O2. This study provides a novel strategy for regulating active sites in Fe-based catalysts to ensure sustained performance, offering a pathway for the rational design of next-generation Fenton-like catalysts for efficient and sustainable micropollutant removal from wastewater.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2020
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IF 7.489
Yingying Qin,Jian Lu,Fanying Meng,Xinyu Lin,Yonghai Feng,Yongsheng Yan,Minjia Meng
Effectively separating photo-generated charge carriers is usually important but difficult for the high-activity photocatalysis. Fabricating 2D/2D Schottky-Ohmic junction is more beneficial to the spatial separation and transfer of photo-induced charges at the interface of different components due to the matching of distinct two-dimension structure and band alignment, but the manipulation and mastery of junction type (Schottky-Ohmic junction and Z-scheme junction) and electronic structure is an arduous task for preparing satisfactory photocatalysts and investigating the PHE mechanism. In this work, the 2D/2D WO 3 /Pt/ g -C 3 N 4 (WPC) Schottky-Ohmic junction composite photocatalysts is formed via facile hydrothermal and photo-induced deposition method for employing to produce H 2 . The optimized WPC Schottky-Ohmic junction photocatalyst exhibits remarkable photocatalytic H 2 -release performance with ability to produce the amount of H 2 reaches 1299.4 μmol upon exposure to visible light, which is about 1.2 and 11.5 times higher than that of WO 3 / g -C 3 N 4 /Pt (WCP) (1119.4 μmol) and pure CN (113.2 μmol)), respectively. This remarkable enhancement of photocatalytic performance is ascribed to: (i) Schottky-Ohmic junction can strikingly expedite spatial charge separation and elongate electron lifetime, (ii) the 2D/2D structure can shorten the charge transportation distance, (iii) Pt with rich electron density can stably adsorb H + . This work provides a successful paradigm for future fundamental research, and exquisitely designs ideal g -C 3 N 4 -based photocatalysts by simultaneously adjusting and optimizing material structure and electronic dynamics.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
·
IF 13.2
Guo-Li Chen,Hui-Ye Jiang,Yan Jiang,Zhao-Peng Deng,Ying-Ming Xu,Li-Hua Huo,Shan Gao
The efficient and synchronous monitoring of diverse harmful gases by one portable sensor has recently become a hot topic due to the vast majority of reports for only sensing a given gas. Herein, two types of hollow microspheres cross-linked through γ-WO 3 nanosheets were controllably prepared by simple pyrolysis of commercial ammonium metatungstate (AMT). Among, the orange product obtained by air calcination at 400 °C is trace (NH 4 ) 0.33 WO 3 doped γ-WO 3 composite, and has broad mesoporous structure, rich oxygen vacancies and the synergistic catalysis of surface W 6+ Lewis acid. These unique factors help to promote the diffusion of gas molecules, expose more active sites for chemical reaction, increase the conductivity of sensitive material and modulate the state of surface adsorbed oxygen species, which in turn effectively improve its sensitive capability toward diverse noxious gases. The (NH 4 ) 0.33 WO 3 /WO 3 sensor achieves response values of 234 for 5 ppm NO 2 at low 50 °C and 170 for 100 ppm diisopropylamine (DIPA) at 170 °C. Meanwhile, it also displays low detection concentrations, good reversibility and moisture resistance, as well as practical detection for vehicle exhaust and prometryn. This is also the first report of a WO 3 -based sensor that can simultaneously achieve dual-detection of trace NO 2 and DIPA. Moreover, the temperature-tuned dual-response mechanism has also been discussed in detail.
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高影响因子
APPLIED CATALYSIS A-GENERAL
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2021
·
IF 5.706
Zhiyu Liu,Liang Chen,Congcong Piao,Jianhe Tang,Yu Liu,Yitong Lin,Dawei Fang,Jun Wang
A novel Z-scheme WO 3 :Yb 3+ ,Er 3+ /Ag/Ag 3 VO 4 /Ag photocatalyst is prepared via hydrothermal and calcination methods. In this system, WO 3 :Yb 3+ ,Er 3+ is used as an excellent up-conversion luminescent agent and highly active photocatalyst to broaden the light response range. Ag with SPR effect is regarded as electronic channel and cocatalyst to accelerate electron transfer and increase hydrogen production. The photocatalytic performance of Z-scheme WO 3 :Yb 3+ ,Er 3+ /Ag/Ag 3 VO 4 /Ag photocatalyst is assessed by levofloxacin degradation with synchronous hydrogen production. Some influence factors, sunlight irradiation time, sacrificial agent concentration and catalyst cycle number, are discussed. The emission light spectrum and energy conversion mechanism of WO 3 :Yb 3+ ,Er 3+ are studied. The photocatalyst gives prominent degradation ratio (90.44 %) and hydrogen production amount (489.02 μmol/g) under sunlight irradiation for 180 min. It shows a high stability and reusability in levofloxacin degradation with synchronous hydrogen production within five cycles. The possible mechanism of levofloxacin degradation with synchronous hydrogen production caused by Z-scheme WO 3 :Yb 3+ ,Er 3+ /Ag/Ag 3 VO 4 /Ag photocatalyst is proposed.
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CHEMICAL ENGINEERING JOURNAL
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2023
·
IF 15.1
Guowei Wang,Hefa Cheng
In recent decades, the overuse and misuse of antibiotics have caused serious harm to aquatic ecosystems . This work successfully designed a unique recyclable WO 3 /NiFe 2 O 4 /BiOBr (WNB) composite with dual Z-scheme heterojunction to degrade levofloxacin (LEV) in aqueous solution. The results indicated that the as-prepared WNB composite displayed the greatest sonocatalytic activity for LEV degradation. In particular, WNB showed the highest LEV (at 10 mg/L) removal efficiency (97.97 %) within 75 min under ultrasonic irradiation. The significantly enhanced catalytic activity of WNB was attributed to the unique dual Z-scheme structure, which makes it easier for the transfer and the spatial separation of photo-generated electron-hole (e − -h + ) pairs, and dramatically increases the carrier lifespan. Furthermore, the ternary composite comprises three different semiconductors from narrow to broad bandgap, which are suitable for harvesting full-spectrum light. The recycle experiments demonstrated the catalyst's excellent sonocatalytic stability and easy recovery, which is attributed to its magnetic property. Furthermore, based on the intermediates identified during the degradation process, a potential mechanism and pathway for LEV degradation were presented. This work provides a unique perspective on designing efficient sonocatalysts for environmental remediation.
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高影响因子
Advanced Science
·
2021
·Vol. 9
·期 2
·2102530
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IF 16.806
Fazal Raziq,Amil Aligayev,Huahai Shen,Sharafat Ali,Rahim Shah,Sajjad Ali,Syedul H. Bakhtiar,Asad Ali,Naghat Zarshad,Amir Zada,Xiang Xia,Xiaotao Zu,Muslim Khan,Xiaoqiang Wu,Qingquan Kong,Chunming Liu,Liang Qiao
Artificial Z-scheme, a tandem structure with two-step excitation process, has gained significant attention in energy production and environmental remediation. By effectively connecting and matching the band-gaps of two different photosystems, it is significant to utilize more photons for excellent photoactivity. Herein, a novel one-photon (same energy-two-photon) Z-scheme system is constructed between rGO modified boron-nitrogen co-doped-WO 3 , and coupled CdSe quantum dots-(QDs). The coctalyst-0.5%Rh x Cr 2 O 3 (0.5RCr) modified amount-optimized sample 6%CdSe/1%rGO3%BN-WO 3 revealed an unprecedented visible-light driven overall-water-splitting to produce ≈51 µmol h −1 g −1 H 2 and 25.5 µmol h −1 g −1 O 2 , and it remained unchanged for 5 runs in 30 h. This superior performance is ascribed to the one-photon Z-scheme, which simultaneously stimulates a two photocatalysts system, and enhanced charge separation as revealed by various spectroscopy techniques. The density-functional theory is further utilized to understand the origin of this performance enhancement. This work provides a feasible strategy for constructing an efficient one-photon Z-scheme for practical applications.
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PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2021
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IF 8.128
Jiming Huang,Ping Xue,Sheng Wang,Shujun Han,Liguang Lin,Xuan Chen,Zhengbang Wang
Designing recyclable photocatalysts with high activity and stability has drawn considerable attention in the fields of sewage treatment. Herein, a series of heterojunctions constructed by zirconium-based metal–organic frameworks (UiO-66-NH 2 ) and tungsten trioxide (WO 3 ) is immobilized on carbon cloth via a facile solvothermal method , resulting in highly recyclable photocatalysts. Multiple characterization techniques, such as X-ray diffraction, scanning electron microscopy, transmission electron microscopy , X-ray photoelectron spectroscopy, and Fourier-transform infrared spectroscopy, verify the successful synthesis of UiO-66-NH 2 nanospheres on the surface of needlelike WO 3 modified carbon cloth. Results show that the optimal heterojunction photocatalyst exhibits excellent photocatalytic degradation efficiency for the removal of tetracycline (TC) from water, for which nearly 100% of TC is degraded within 60 min under visible light . Trapping experiments and electron spin resonance (ESR) spectra analyses demonstrate that the superoxide radicals O 2 – and photogenerated hole h + play a dominant role in the degradation process. Excellent photocatalytic activity is dominantly attributed to the effective separation of photoinduced carriers in this type-Ⅱ heterostructure system. Moreover, the possible photocatalytic oxidation degradation pathway is confirmed by analyzing intermediates using liquid chromatography mass spectrometry (LC-MS). This study offers a highly efficient strategy to design recyclable heterojunction photocatalysts for the degradation of refractory antibiotics in sewage.
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高影响因子
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