APPLIED SURFACE SCIENCE
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2018
·
IF 4.439
Gangqiang Zhu,Mirabbos Hojamberdiev,Shaolin Zhang,Syed Taj Ud Din,Woochul Yang
In order to further improve its photocatalytic activity , the BiOI microspheres were activated by a synchronous coupling of Bi metal and graphene under solvothermal conditions. The effects of the synthesis temperature (160–200 °C) on crystallinity, morphology, and photocatalytic activity were studied in particular. As expected, the ternary Bi-BiOI/graphene photocatalyst synthesized at 180 °C exhibited higher photocatalytic activity for NO oxidation removal under visible light irradiation than individual BiOI, and binary Bi-BiOI and BiOI/graphene composites. The photocatalytic efficiency for the NO removal of the ternary Bi-BiOI/graphene photocatalyst synthesized at 180 °C reached 51.8% within 30 min of visible light irradiation. The enhanced photocatalytic activity of the ternary Bi-BiOI/graphene photocatalyst is attributed to (I) the efficient transfer of photo-generated electrons from BiOI and Bi to graphene, leading to the effective separation of the photo-generated electron-hole pairs and (II) the surface plasmon resonance effect of Bi nanoparticles in the composite photocatalyst. Furthermore, the results of the scavenger experiments and DMPO-ESR spin-trapping measurements reveal that O 2 − radical species play the most critical role and holes serve as a secondary active species in the oxidative removal process of NO by 180BOI/GR composite under visible light irradiation.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2019
·
IF 5.107
Dafeng Zhang,Hao Liu,Changhua Su,Hong Li,Yanling Geng
Bi/BiOBr composites with oxygen vacancies were synthesized by a simple combustion method. The as-synthesized catalysts were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, electron paramagnetic resonance spectroscopy, UV–Vis diffuse reflectance spectroscopy, and photoluminescence spectroscopy. Along with the formation of BiOBr, the reduction of partial Bi 3+ cations was achieved, and thus Bi/BiOBr composites were one-pot obtained. Moreover, the formation of oxygen vacancies was confirmed. Compared with pure BiOBr, Bi/BiOBr composites exhibit significantly improved photodegradation performances under visible light irradiation, which can be attributed to the surface plasma resonance effect, electron sink effect of metallic Bi nanoparticles, and the narrowed band gap caused by the formed oxygen vacancies. Moreover, the main active species and photocatalytic mechanism of Bi/BiOBr under visible light irradiation were discussed in detail.
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JOURNAL OF HAZARDOUS MATERIALS
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2019
·
IF 7.65
Ningyuan Zhu,Chunquan Li,Lingjun Bu,Cilai Tang,Sichu Wang,Pengfei Duan,Lunguang Yao,Jun Tang,Dionysios D. Dionysiou,Yonghong Wu
An innovative advanced oxidation process was successfully developed to photocatalytic-degradation of estrone through the synergistic effect of biochar and Bi/Bi 2 O 3 in bismuth-containing photocatalytic biochar (BiPB). The highest reaction rate constant ( k obs ) of estrone degradation by BiPB was 0.045 min −1 under the conditions of initial concentration of estrone =10.4 μmol L −1 , [BiPB] =1 g L −1 , pH = 7.0. The k obs was almost tenfold and more than 20 times than that of biochar without bismuth impregnation and pristine Bi/Bi 2 O 3 , respectively. The best photocatalytic performance of BiPB composites for the degradation of estrone was primarily attributed to generation of OH radicals. Impregnation of bismuth helped control the concentration of persistent free radicals (PFRs) and develop a hierarchical porous structure of biochar. The presence of biochar facilitated pre-concentration estrone on BiPB and improved the separation and transfer efficiency of charge carriers. The synergistic effect between biochar and Bi/Bi 2 O 3 contributed to the generation of OH radicals for estrone degradation under neutral pH conditions. The transformation pathway of estrone was also proposed based on the measured transformation products in the presence of BiPB. The high efficiency of BiPB composites indicated that this easily-obtained material was promising for estrone-wastewater treatment applications as a low-cost composite photocatalyst.
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PubMed
高影响因子
ChemCatChem
·
2019
·Vol. 12
·期 5
·1376-1384
·
IF 4.495
Wen-Di Guo,Lei Liu,Shu-Qing Yang,Xiao-Chao Chen,Yong Lu,Giang VO-Thanh,Ye Liu
Graphical Synergetic catalysis : The one-pot tandem bis-alkoxycarbonylation of alkynes was accomplished over the bi-functional catalytic system containing Xantphos-modified Pd-complex and Lewis super-acid of Al(OTf) 3 . Via the synergetic catalysis, the involved Xantphos-modified Pd-complex was responsible for the activation of CO and the alkynes through coordination to Pd-center while Al(OTf) 3 was in charge of the activation of the alcohol to facilitate the formation of [Pd−H] + active species. Tandem bis-alkoxycarbonylation of alkynes allows for the preparation of 2-substituted succinates from alkynes and nucleophile alcohol via two successive alkoxycarbonylation with advantages of 100 % atomic economy and simplified one-pot operation. Herein, the one-pot tandem bis-alkoxycarbonylation of alkynes was accomplished over the bi-functional catalytic system containing Xantphos-modified Pd-complex and Lewis super-acid of Al(OTf) 3 . It was found that, via the synergetic catalysis, the involved Xantphos-modified Pd-complex was responsible for the activation of CO and the alkynes through coordination to Pd-center while Al(OTf) 3 was in charge of the activation of the alcohol to facilitate the formation of [Pd−H] + active species. The in situ high-pressure FT-IR analysis, coupled with 1 H/ 13 C NMR spectral characterizations, confirmed that the introduced Al(OTf) 3 with intensive oxophilicity (via acid-base pair interaction) was able to activate nucleophilic MeOH to be a reliable proton-donor ( i. e . hydride-source) to warrant the formation and stability of [Pd−H] + species upon the oxidation of Pd 0 by H + (Pd 0 +H + →[Pd II −H] + ). Over the developed bi-functional catalytic system, the yields of the target diesters were obtained in the range of 36∼86 % in this sequence with the wide substrate scope.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2023
·
IF 15.1
Jialiang Jiang,Jinju Zheng,Hui Fu,Hao Zhang,Deliu Ou,Qiaochu Chen,Kai Wang,Sheng Cao,Jialong Zhao,Zhentao Du,Weiyou Yang
Vacancy-ordered double perovskites (DPs) are promising candidates for modern white light-emitting-diodes (WLEDs) due to their low toxicity and unique optical properties. However, the grand challenge is that DPs synthesized at room temperature (RT) typically have a low photoluminescence quantum yield (PLQY), most of which reported below 51 %, making them impractical for applications. Here, we present a facile strategy for the mass production of Bi 3+ and Te 4+ co-doped Cs 2 HfCl 6 (CHC) DPs at RT, to realize single-component dual-band emission with a high color rendering index. It is witnessed that the rationally designed ligand [Hmim]Cl facilitates a strong chemical interaction between the ligand and DPs. This interaction allows [Hmim]Cl to coordinate with undercoordinated Hf 4+ ions and provide excess chloride ions to the surface of the DPs. Consequently, it effectively controls the crystallization of DPs, protects them against moisture, reduces surface defects, and increases the migration barrier of halogen ions. As a result, the DPs exhibit excellent overall performance with robust photostability and a superior PLQY of 96.4 %, which is ∼ 2 times the highest reported value for similar DPs synthesized at RT. Current work presents a potential pathway for the mass production of high-quality DPs under mild conditions, leading to the development of signal-component WLEDs.
研究领域:
材料科学
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光电技术
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纳米技术
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高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Xiaofan Sun,Cuiping Xu,Peiqi Ji,Zheng Tang,Shulin Jiao,Yanzhou Lu,Min Zhao,Hong-Ling Cai,X.S. Wu
Dielectric capacitors are used in pulsed power devices due to their high-power density. The energy storage density and efficiency need to be further improved to widen their applications. This work investigates the energy storage of high entropy ceramic (Pb 0.25 Ba 0.25 Ca 0.25 Sr 0.25 )TiO 3 synthesized by the solid-state method. The Bi(Mg 2/3 Nb 1/3 )O 3 (BMN) is introduced to enhance its energy storage performance. The introduction of BMN from x = 0 to 0.15 reduces the grain size from 5.9 μm to 245 nm, increases the band gap from 2.98 to 3.05 eV, and improves the differences between saturation and remnant polarization from 11.85 to 14.60 μC/cm 2 . The phase diagram of this system was constructed by dielectric properties analysis to understand the effect of Bi(Mg 2/3 Nb 1/3 )O 3 in the energy storage performance. The optimal energy density of 5.58 J/cm 3 and efficiency of 89.4% was achieved in 0.9PBCST-0.1BMN which can be promising candidates for application in dielectric energy storage.
研究领域:
材料科学
·
电气工程
·
能源存储
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高影响因子
MATERIALS CHEMISTRY AND PHYSICS
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2018
·
IF 2.21
Wei Zhang,Zhiyuan Wang,Keyu Chen,Lang Li,Li Tao,Jun Zhang,Hao Wang
Two types of bi-component supramolecular gel electrolytes were prepared. It is interesting that the single molecular N,N ′-1,3-propanediylbis-dodecanamide cannot form gel electrolyte. However, when 1,6-diaminohexane and adipic acid as co-gelators were added to the liquid electrolyte containing N,N ′-1,3-propanediylbis-dodecanamide, the corresponding supramolecular gel electrolytes, Gel 1 and Gel 2 were formed. And these two gel electrolytes exhibit significantly different morphology of 3D network. The influences of different morphology and electrolyte component on the dynamic process and photovoltaic performances of quasi-solid-state dye-sensitized solar cells (QS-DSSCs) were investigated by the controlled intensity modulated photocurrent/photovoltage spectroscopy (IMPS/IMVS) measurements and electrochemical impedance spectroscopy (EIS) measurements. It is found that Gel 2 presents a sparser network structure compared with Gel 1. Moreover, Gel 2 based QS-DSSC shows a dramatic enhancement in short circuit photocurrent density ( J sc ) and while a slightly decrease in open circuit voltage ( V oc ) than those of Gel 1 based QS-DSSC. And more remarkable, the power conversion efficiency of Gel 2 based QS-DSSC (5.89%) is higher than that of Gel 1 based QS-DSSC (5.05%), which even slightly exceeds that of the DSSC based on the liquid electrolyte (5.82%).
研究领域:
材料科学
·
物理化学
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高影响因子
MATERIALS RESEARCH BULLETIN
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2023
·
IF 5.4
Xuewen Peng,Bin Yang,Danjiang Deng,Zhiwei Cai,Xi Kong,Letao Yang,Jinming Guo
The application of lead-free dielectric ceramics for energy storage has received extensive attention because of their remarkable potential as pulse capacitors in power electronic devices. The current study developed a strategy for improving the energy storage performance of (K 0.5 Na 0.5 )NbO 3 (KNN)-based ceramics by incorporating Bi(Zn 2/3 Nb 1/3 )O 3 to reduce grain size, increase dielectric breakdown strength, and enhance ferroelectric relaxation degree. The resulting 0.87KNN–0.13BZN ceramics exhibited a high energy density (7.4 J/cm 3 ) and moderate energy efficiency (74%) at an ultrahigh electric field (750 kV/cm) as well as excellent optical properties. Therefore, the 0.87KNN–0.13BZN ceramic is a promising candidate for pulse capacitors, providing a feasible approach for the development of new lead-free energy storage materials.
研究领域:
材料科学
·
电子工程
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高影响因子
CHEMOSPHERE
·
2018
·
IF 4.427
Yingying Chen,Weiying Xu,Hongjian Zhu,Dong Wei,Ning Wang,Mengting Li
Natural organic matter (NOM) in aquatic environments have a significant impact on NOM-organic compound interactions, which could strongly affect the distribution and transformation of organic compounds during water treatment . This study focused on the removals of NOM (humic acid, HA) and synthetic organic matter (ibuprofen, IBP) through enhanced coagulation and magnetic ion exchange (MIEX) resin adsorption in single and bi-component systems. Two coagulants, traditional aluminum sulfate (AS) and lab-prepared polyaluminum chloride (PACl), were employed. The charge properties, particle size distribution , and fractal dimension ( D f ) during organic matter removal were studied in both the single and bi-component systems to explore the purification behaviors and mechanistic effects of interactions between coagulants, MIEX, and organic matters. The experimental results indicated that the Al-based coagulants could remove over 80% of HA in both the single and IBP-HA combined systems, while the presence of HA could considerably improve the IBP removal rate. The aggregates formed during single-component coagulation were larger, but weaker and more loosely structured than those formed in the bi-component system under the same coagulation conditions. In the single-component system, the maximum removal efficiencies of IBP and HA by MIEX adsorption were 65% and 72%, respectively, at a resin dosage of 20.0 mL/L and mixing time of 60 min. Under the same conditions, the removals of these components in the bi-component system were improved to 68% and 98%, respectively. The reaction rate between IBP and MIEX resin was found faster than that between HA and MIEX resin.
研究领域:
环境科学
·
水处理工程
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
He Zhao,Chu Xu,Caobin Zhou,Ling Zhang,Chunzhong Li
Existing triboelectric nanogenerators (TENGs) for wearable sweat sensors are plagued by low power density, which restricts their practical application. This study focuses on boosting TENGs output power via a fluorinated bi-layer electronic textile (e-textile) fabricated by electrospinning rotary collection, enabling self-powered dual functionality: real-time electrochemical sweat sensing and human motion detection. The key design includes a PCLU-HFDD negative triboelectric layer (molecularly incorporated with hexadecafluorodecanediol to enhance electron affinity) and a poly(lactic- co -glycolic acid) (PLGA) positive layer. Rotary collection creates vein-like nanostructures on PCLU-HFDD yarns (6.2 μm roughness, 114.8° water contact angle), increasing contact area. The PCLU-HFDD TENG achieves a high power density of 0.66 W m −2 , an open-circuit voltage (Voc) of 117.08 V, and excellent stability over 35,000 contact-separation cycles. Critically, integrated with both sweat-sensing and motion-detection capabilities, the e-textile enables 180-min continuous glucose monitoring (under sedentary conditions) and recognition of human motions. This work confirms that the power enhancement not only overcomes the bottleneck of TENGs for wearable sensors but also facilitates dual-modal health monitoring, advancing the development of practical wearable bioelectronics.
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产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2026
·
IF 7.7
Shikun Li,Qin Zhou,Junru An,Silong Qiang,Weihao Hu,Zhixiu Sun,Jianjun Liao,Shiwei Lin
Traditional electrochemical methods often face challenges in accurately detecting heavy metal ions in seawater due to high salinity and complex organic matrices. Herein, a porous, defect-rich graphitic carbon nitride/bismuth–bismuth oxide (pdr-g-C 3 N 4 /Bi@Bi 2 O 3 ) composite was fabricated via two-step calcination and hydrothermal assembly, and applied for simultaneous Cd(II) and Pb(II) detection by SWASV. The unique porous structure and abundant defect sites facilitate efficient ion preconcentration and electron transfer, leading to high sensitivity and selectivity. Under optimized conditions in sodium acetate–acetic acid buffer (pH 6.0), the sensor exhibits linear detection ranges of 5–200 ppb for both Cd(II) and Pb(II), with limits of detection (LOD) of 0.513 ppb and 0.313 ppb, respectively. Remarkably, the sensor demonstrates excellent stability and accuracy even in unprocessed seawater samples, achieving LODs of 0.32 ppb for Cd(II) and 10.13 ppb for Pb(II). These results confirm the feasibility of direct, on-site detection of trace heavy metals in complex marine environments, offering a practical strategy for rapid environmental monitoring.
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产品关联
DOI
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Baoyang Liu,Wang Yao,Peng Qin,Jun Qian,Xuli Ding
To cope with the charging-time and driving-range issues of the power batteries, a composite and phase modification tactics is manifested to increase the cycling stability and rate capability of the Sb 2 SnO 5 (SSO) anode for sodium-ion batteries (SIBs). The as-fabricated Bi/SSO@PCFs composite with Bi nanocrystals homogeneously dispersed on and around the SSO surface is prepared by an electrospinning method . The excellently dispersed Bi nanocrystals realize an effective contact with SSO, which effectively lowers the electron conduction barriers and promotes the sodium ion release as well as the transport upon the desodiation/sodiation process, increasing the rate capacity and cycle stability of the SSO anode. Importantly, a high-speed ion channel is constructed through the special layered Bi, and SbBi phase. The prepared Bi/SSO@PCFs anodes deliver a high rate capacity up to 25 A g −1 and long cycle life of 5000 cycles with 83 % capacity retention rate, sustaining an average capacity loss of 0.0034 % for each cycle. Particularly, the intercalation of Na + between layer-structure Bi and SbBi galleries provides a good basis for excellent cycle performance due to small volume change and unobstructed ion channels. This finding provides an effective strategy to establish ion transport highways, which essentially increase the rate-capacity and cycle-life of the SSO-based anodes for SIBs.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
电池技术
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高影响因子
危险品化学品经营许可证（带存储）