SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Tianjian Dang,Guanghua Lu,Runren Jiang,Min Wang,Xiqiang Zheng
Constructing stable, efficient, and affordable visible-light-driven catalysts is a promising technique to remediate water pollution from released antibiotics. In this research, etched Bi@MIL-125 composites were manufactured using a simple hydrothermal method, and their photocatalytic efficacy was tested using tetracycline (TC) as the target contaminant. Morphological analyses indicated that Bi nanoparticles (NPs) were consistently wrapped around the MIL-125 surface, introducing mesoporous structures in MIL-125 by Bi etching. Among different mass ratios (Bi: MIL-125), the Bi@MIL-125 sample with a 1:1 mass ratio (BM100) showed the greatest photodegradation rate (98.6 %) of TC upon visible light illumination. The BM100 exhibited the greatest apparent deterioration rate constant for TC (0.036 min −1 ), 74 times higher than that of pristine MIL-125. The absorption enhancement of Bi@MIL-125 in the visible range was ascribed to the surface plasmon resonance effect of Bi NPs. The mesoporous structure of Bi@MIL-125 provided channels through which TC entered the composite's interior, and the confined space enabled more opportunities for the interaction of •O 2 – and h + active species and TC pollutant molecules. In addition, liquid chromatography-tandem mass spectrometry was used to determine potential intermediates of the photodegradation reaction of TC and BM100, and two distinct degradation routes were hypothesized. Ultimately, combining ECOSAR predictions with zebrafish behavioral tests to assess the toxicity changes in degradation processes and the acute and chronic toxic effects on aquatic animals, the inhibition of the locomotive behavior of zebrafish was significantly decreased after 120 min of photocatalytic degradation, suggesting that the BM100 sample can effectively degrade TC and detoxify the aquatic environment.
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高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2022
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IF 10.319
Qiang Peng,Meng Ma,Si Chen,Yanqin Shi,Huiwen He,Xu Wang
Developing excellent absorption-dominant electromagnetic interference (EMI) shielding composites is an urgent demand for the rapid development of 5 G technology and electronic equipment. Herein, a simple strategy is employed to fabricate carbon nanotubes-polypropylene fibers (CP) /polypropylene-glass fibers felt (PGFF)/Fe 3 O 4 composites with superior EMI shielding effectiveness and low reflection due to the magnetic-conductive bi-gradient structure which is naturally formed by deposition during the vacuum-assisted filtration process. The difference in dimensionality between one-dimensional CNT with outstanding electrical conductivity and zero-dimensional magnetic Fe 3 O 4 nanoparticles is the theoretical basis for the successful construction of the magnetic-conductive bi-gradient structure in a gap-rich PGFF matrix that endows the composites with “absorb-reflect-reabsorb” EMI shielding mechanism. When the electromagnetic waves are incident from the magnetic layer, the EMI shielding effectiveness (SE) reaches 48.9 dB as the weight percentage of the conductive layer increases, more importantly, the reflection coefficients are reduced by more than 0.32 compared with that of another incident pattern. What's more, the resultant composites exhibit an outstanding signal shielding function in the application. This work paves a convenient pathway for designing a magnetic-conductive bi-gradient structure and efficient absorbing EMI shielding composites applied in the next-generated electronic information and communication field.
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高影响因子
SOLID STATE SCIENCES
·
2022
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IF 3.752
Peijie Weng,Qing Cai,Linfeng Zhang,Huadong Wu,Kun Wu,Jia Guo
In this study, the Mo -doped hollow hierarchical Bi/BiOBr microspheres are prepared by the solvothermal method with the Sn 2+ as reductant. The prepared composites show a good degradation effect for ciprofloxacin (CIP) under visible light. Especially, the BSM-22 composite show the best photocatalytic activity, with the apparent rate constant k as high as 0.03014 min −1 , which is 26.9 times that of the pure BiOBr. It is assumed that the introduction of Sn 2+ facilitate the formation of hollow hierarchical microspheres structure of BiOBr microspheres and the appearance of metallic Bi on the surfaces. Therefore, the transfer and separation efficiency of photogenerated charges is increased in the composites. Impressive, benefit from the microtopography of the hollow structure, the specific surface area of the BSM-22 (53.476 m 2 /g) is 21.76 times than that of the BiOBr (2.458 m 2 /g). The doping of Mo reduces the band gap of BiOBr (exactly from 2.61 to 1.96 eV) and broaden the photoabsorption region. Therefore, the photocatalytic activity of the Mo -doped Bi/BiOBr microspheres are heavily improved in dealing with different kinds of antibiotic molecules. More importantly, these results show that the design strategies of heteroatom doping, metal bismuth production, and morphology control of the bismuth oxybromide composite can greatly improve the visible-light catalytic activity.
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高影响因子
JOURNAL OF POWER SOURCES
·
2022
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IF 9.794
Yani Liu,Yu Wang,Haoqiang Wang,Shuming Dou,Junwei Wu,Wei Gan,Qunhui Yuan
Aiming to the repetitively large volume change and the inevitably loss of volumetric capacity of bismuth (Bi) based sodium-ion battery (SIB) during cycling, a binder-free Bi anode based on one-step electrochemical co-deposited three-dimensional Bi nanosheets and conductive carbon nanotube networks (Bi NS/CNTs) was developed. Compared with the sole Bi anode achieved via the same strategy, the co-deposition of 3D hierarchical Bi nanosheet/CNTs arrays manifests the strong interfacial adhesion and accommodates the volume change upon sodium alloying/dealloying. Such structural feature endows the Bi NS/CNTs anode a long-term cycling stability (383.72 mAh g −1 at 0.1 A g −1 after 200 cycles, 311.68 mAh g −1 at 1 A g −1 after 1000 cycles) and a good rate performance. A full SIB assembled with Bi NS/CNTs anode and Na 3 (VOPO 4 ) 2 F@rGO cathode shows a high operating voltage (above 4 V) and a high energy density of 221.99 Wh kg −1 , which outperforms many reported Bi-based analogues. This work may open a new opportunity for developing efficient SIB with high energy and good practicability.
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ACS Sustainable Chemistry & Engineering
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2022
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IF 9.224
Miao Wang,Shuai Liu,Bo Chen,Fengyu Tian,Chuang Peng
Electrochemical CO2 reduction to formate provides a prospective avenue to produce more valuable products. Compared to pure Bi and Cu, the Bi–Cu (2:1) bimetallic catalyst optimizes the interfacial electronic structure through the electronic interaction between Bi and Cu. The Bi–Cu (2:1) catalyst exhibits a high faradaic efficiency of 94.1% at −1.0 V vs RHE, high faradaic efficiency (>90%) toward formate in a wide potential window (500 mV), and long-term stability of 20 h. The electrocatalytic mechanism is identified by combining in situ FT-IR and DFT calculations, which demonstrates that formate prefers to be formed through the HCOO* pathway. High faradaic efficiency in a wide potential window can be ascribed to stable active sites and the decreased energy barrier in HCOO* and formate. This study further provides inspirations for promoting the electrocatalytic selectivity of bimetallic catalysts through effective interfacial electronic modulation.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
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IF 13.273
Haoyi Wang,Ye Zhou,Jinnan Wang,Aimin Li,Philippe François-Xavier Corvini
To remove endocrine disrupting chemicals (EDCs), visible-light response photocatalyst BiOBr/Bi 4 O 5 Br 2 /perylene diimide (PDI) with bi-heterojunction was constructed. Under visible-light irradiation, BiOBr/Bi 4 O 5 Br 2 /PDI could degrade 90% Bisphenol A (BPA) within 75 min, while degrade 100% 17α-ethynyl estradiol (EE2) and 17β-estradiol (E2) within 15 min. Radicals quenching experiment and EPR indicated both •O 2 – and holes were the main substances for EDCs degradation, and the possible degradation pathway of EDCs are proposed based on the LC-MS analysis results. In the composite of BiOBr/Bi 4 O 5 Br 2 /PDI, the matching energy band structure between Bi 4 O 5 Br 2 and BiOBr facilitated the formation of heterojunction for strengthening the space charge separation. Meanwhile, PDI with strong photosensitivity combined with BiOBr/Bi 4 O 5 Br 2 not only enhanced visible-light photocatalytic activity but also broadened the light-harvesting range. Owning to the unique one-dimensional conjugated structure and internal electric field effect, PDI could also promote the photo-carriers transfer and separation. With the bi-heterojunction effect, photo-generated electrons were transferred to BiOBr conduction band while holes were accumulated on PDI valence band. Simultaneously, holes could oxidize water with the production of oxygen following being reduced to •O 2 – by photo-generated electrons. Even under oxygen-poor conditions, the production of •O 2 – can reach 32.7 × 10 -5 mol•g −1 •h −1 , resulting in more than 85% BPA degradation within 75 min.
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Journal of Materials Chemistry C
·
2021
·Vol. 10
·期 1
·337-345
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IF 7.393
Hongrui Jia,Zhigang Liang,Zhen Li,Fei Li,Linghang Wang
Ferroelectric ceramic materials with large and temperature-insensitive strain responses are highly desired for the practical application of actuators in harsh environmental conditions. In this work, novel xBi(Mg1/2Zr1/2)O3–(0.55 − x)PbZrO3–0.45PbTiO3 (xBMZ-PZ-0.45PT) ternary ferroelectric ceramics were successfully fabricated by a solid-state reaction process. The phase structure of xBMZ-PZ-0.45PT ceramics gradually evolves from rhombohedral-tetragonal coexistence phases to rhombohedral phase with an increase in the BMZ content and the diffuse phase transition behavior becomes increasingly evident. The relaxation behavior is strongest for x = 0.35 composition. Pmax and Pr values first gradually increased, and then gradually decreased with increasing BMZ content, while Ec values display an increasing trend. A large strain response of 0.33% at 5 kV mm−1 was obtained in this ternary ferroelectric ceramics with x = 0.35, which can be attributed to the electric field-induced reversible ergodic relaxation phase to the ferroelectric phase transition. The strain was simultaneously temperature-insensitive with a slight decrease from 0.33% at 30 °C to 0.32% at 150 °C. The results indicate that BMZ-PZ-PT ternary ferroelectric ceramics are promising candidate materials for actuator applications in harsh environmental conditions.
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Materials Today Nano
·
2023
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IF 10.3
Luchen Ai,Huanshun Yin,Suo Wang,Jun Wang,Xiaolong Gao,Xianqiang Yin,Kunpeng Dou,Peng Ju,Huimin Sun
To improve the photocatalytic activity of BiOF under simulated sunlight irradiation, a ternary Bi-based Z-scheme heterojunction of Bi/BiOF/Bi 2 O 2 CO 3 nanosheets were prepared using one-pot hydrothermal technique, where N, N-dimethylformamide was used as carbon source for Bi 2 O 2 CO 3 and reductant for metal Bi, bismuth nitrate was employed as Bi source and NaF was used as F source. The photocatalytic activity of Bi/BiOF/Bi 2 O 2 CO 3 was improved greatly towards ciprofloxacin degradation with the reaction kinetic constant of 0.0649 min −1 , which was 7 and 3.5 times to that of BiOF and Bi 2 O 2 CO 3 , respectively. The improved photocatalytic activity was ascribed to the surface plasmon resonance effect of metal Bi and the synergistic effects of BiOF/Bi 2 O 2 CO 3 Z-scheme heterojunction, which facilitated the migration of the photogenerated electron and inhibited the recombination of photogenerated e − /h + pairs. The degradation mechanism and charge transfer pathway were confirmed. This work expands the application of BiOF-based photoactive materials in environmental field.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
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IF 15.1
Jian Zhou,Ying Liu,Fengling Zhuo,Hui Chen,Huan Cao,YongQing Fu,Jianfei Xie,Huigao Duan
Hydrogel-based flexible strain sensors have great potentials for applications in wearable electronics, human–machine interfaces, and soft robotics. Although great efforts have been made on enhancing tensile strain sensing capability of hydrogels, their sensing capabilities under compressive deformation have seldom been explored. Herein, we report a liquid metal-based hybrid hydrogel which achieves high stretchability (2300 %), superior bi-directional responses to both compressive strains (with a gauge factor of 33.43) and tensile strains (with a gauge factor of 9.59), fast response time (190 ms), and excellent durability (>1500 cycles). This conductive hybrid hydrogel with multi-interpenetrating networks is constructed by incorporating liquid metal, graphene oxide, poly-dopamine, and potassium chloride into a polymer double-network of polyacrylamide and poly(3,4-ethylenedioxythiophene): poly (styrene sulfonate). By integrating machine-learning algorithm with the hybrid hydrogel sensors, an intelligent dual-mode handwriting recognition system is developed for perceiving finger touch signals (in compressive-strain mode) and finger bending signals (in tensile-strain mode), with high accuracy (>93 %) and fast recognition time (<1s) when recognizing numbers, letters, and signature signals. Furthermore, this handwriting recognition system demonstrates advanced performance for human–machine interactions (e.g., playing music) and virtual reality interactions. This study offers a promising strategy to develop hydrogel electronics with bidirectional sensing capabilities for diversified practical applications.
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2023
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IF 8.4
Ruhui Hu,Suyun Zhong,Hezhen Liu,Yawen Liu,Hongxia Chen,Xiaojun Hu
A dual-ligand Cu-MOFs (Cu-F/Hs) based on phenylalanine (Phe) and histidine (His) was innovatively constructed with enhanced catalytic property. Among them, Phe can interact with the dopamine (DA) to enhance the substrate affinity. Meanwhile, the coordination of His with copper ions was inspired by the active site structure of natural laccase to improve the catalytic activity. The K m value of Cu-F/Hs was 0.14 times of laccase, indicating a high affinity for the catalytic substrate DA. Accordingly, a sensitive sensor for PD-L1 detection was designed by using Cu-F/Hs, which can catalyze DA to form redox-active polymeric conjugates deposited on the electrode surface with good electrical conductivity, thereby contributing a “signal-down” electrochemical response with a double signal enhancement. The detection limit was 0.12 ng/mL in the detection range of 0.5 – 200 ng/mL. This work provided a new and simple way to synthesize MOFs with high substrate affinity and efficient activity, and a general signal amplification strategy induced by the catalytic deposition.
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ACS Sustainable Chemistry & Engineering
·
2023
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IF 8.4
Sitong Liu,Guangmin Ren,Xiangchao Meng
A BrO3–-modified Bi2O3/Bi(OH)3 heterojunction photocatalyst was in situ fabricated by a facile one-pot method and applied in photocatalytic nitrogen fixation. In comparison with Bi(OH)3, the Bi2O3/Bi(OH)3 heterojunction has a larger specific surface area from the nanoflower-like morphology and an extended visible light absorption range. Of special importance, the proper band gap match between Bi(OH)3 and Bi2O3, the multiple charge transfer channels via the BrO3– bridge, and the oriented electron migration in the type-II heterojunction mechanism make a stronger charge separation efficiency. Therefore, the BiO/BiHO-3 sample presented the highest photocatalytic nitrogen reduction performance with an ammonia production rate of 45.28 μmol g–1 h–1, which was 10 times higher than that of Bi(OH)3. Photogenerated cavities are consumed during H2O oxidation to produce O2 and H2O2. However, the O2 production was small, and the H2O2 yield was about 78.5 μmol g–1 h–1. For CO2 reduction, the CO production rate was 52.86 μmol g–1 h–1, which was 1.6 and 1.9 times those of Bi(OH)3 and Bi2O3. This work provides useful guidance for the design and synthesis of efficient catalysts for photocatalytic N2 fixation.
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Jianrong Chen,Dengfeng Yang,Yunkai Zhang,Liyan Yang,Qingyan Wang,Mingguo Jiang,Lixia Pan
In order to better utilize chitinolytic enzymes to produce high-value N -acetyl-D-glucosamine (GlcNAc) from chitinous waste, there is an urgent need to explore bi-functional chitinases with exceptional properties of temperature, pH and metal tolerance. In this study, we cloned and characterized a novel bi-functional cold-adaptive chitinase called Ca Chi18A from a newly isolated strain, Chitinilyticum aquatile CSC-1, in Bama longevity village of Guangxi Province, China. The activity of Ca Chi18A at 50 °C was 4.07 U/mg. However, it exhibited significant catalytic activity even at 5 °C. Its truncated variant Ca Chi18A_ΔChBDs, containing only catalytic domain, demonstrated significant activity levels, exceeding 40 %, over a temperature range of 5–60 °C and a pH range of 3 to 10. It was noteworthy that it displayed tolerance towards most metal ions at a final concentration of 0.1 mM, including Fe 3+ and Cu 2+ ions, retaining 122.52 ± 0.17 % and 116.42 ± 1.52 % activity, respectively. Additionally, it exhibited favorable tolerance towards organic solvents with the exception of formic acid. Interestedly, Ca Chi18A and Ca Chi18A_ΔChBDs had a low K m value towards colloidal chitin (CC), 0.94 mg mL −1 and 2.13 mg mL −1 , respectively. Both enzymes exhibited chitobiosidase and N -acetyl-D-glucosaminidase activities, producing GlcNAc as the primary product when hydrolyzing CC. The high activities across a broader temperature and pH range, strong environmental adaptability, and hydrolytic properties of Ca Chi18A_ΔChBDs suggested that it could be a promising candidate for GlcNAc production.
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PubMed
高影响因子
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