DYES AND PIGMENTS
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2022
·
IF 5.122
Yingying Xiang,Yujiao Tu,Lei Jiang,Lin Yuan,Ze Liu,Qiang Xie,Xuequan Xiong,Fei Song
As one of the most widely used azo synthetic dyes, long-term consumption of excessive amaranthcan cause a threat to health. It is very urgent to establish high selective and sensitive method for amaranth detection. Orange fluorescent carbon dots utilizing l -methionine and o-phenylenediamine as raw materials, namely S,N-CDs, were prepared via one-step hydrothermal method . Dialysis, thin layer chromatography and chromatographic column were employed for further purification. The purified dual-mode nanoprobe based on fluorescent and UV absorption was successfully established. For fluorescent, excellent linear ranges of 5–70 μM and 110–195 μM were obtained, and low detection limit was 345.22 nM. For UV absorption, excellent linear ranges of 0–155 μM with low detection limit 12.70 nM. It revealed that inner filter effect and static quenching dominated in amaranth quenching the fluorescent of S,N-CDs. Furthermore, the dual-mode nanoprobe could be efficiently applied to determine amaranth in fruit juice, carbonated drink, and strawberry jam samples. It provided a new insight on the purification of carbon dots and detection of amaranth by dual-mode nanoprobe.
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高影响因子
Journal of Materials Research and Technology-JMR&T
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2022
·
IF 6.267
Zhuang Fu,Jia-Ling Jiang,Song-Tao Dong,Miao-Cheng Yu,Lijun Zhao,Lei Wang,Shu-Hua Yao
In this study, the facile synthesis method of Bi 2 − x Zr x O 2 Se ( x = 0, 0.02, 0.04, and 0.06) ceramics using a combining the high-energy ball milling and cold pressing was reported. The effects of zirconium (Zr) doping on the microstructure and thermoelectric properties of Bi 2 O 2 Se were systematically investigated. The results indicate that the powder samples were synthesized as a single phase with no impurities. With increasing Zr content, conductivity increased from 13.49 S to 34.91 S cm −1 at 773 K. The thermal conductivity of Bi 1.98 Zr 0.02 O 2 Se was also reduced to 0.51 W m −1 K −1 . The maximum power factor (PF) value of the Bi 1.96 Zr 0.04 O 2 Se sample was 186 μW m −1 K −2 at 773 K. A peak ZT of around 0.27 was achieved for the Bi 1.96 Zr 0.04 O 2 Se sample, which is approximately 2.4 times greater than that of un-doped one (∼0.11). The results indicate that Zr-doping significantly improves the thermoelectric properties of the Bi 2 O 2 Se system.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2022
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IF 6.371
Jie Chen,Wenhao Fan,Yachao Wang,Yu Jiang,Saneyuki Ohno,Zuhair A. Munir,Marhoun Ferhat,Shaoping Chen
In this study we investigated the nature and stability of the interfaces between Mg 2.05 Si 0.98 Bi 0.02 as the TE material and Ni and Mg 50 Si 15 Ni 50 as barriers. Single-leg devices of Ni/TE/Ni and Mg 50 Si 15 Ni 50 /TE/Mg 50 Si 15 Ni 50 were prepared by the SPS process in one step and were then subjected to different aging conditions. Using Mg 50 Si 15 Ni 50 as barrier provided a more stable interface with no evidence of an interaction layer. This contrasted with the case when Ni was used as a barrier. The efficiency, η , and the power output, P out , were higher when Mg 50 Si 15 Ni 50 was used as a barrier. The Ni/TE/Ni and Mg 50 Si 15 Ni 50 /TE/Mg 50 Si 15 Ni 50 devices were aged at 673 K for up to 480 h under vacuum and an Mg vapor. For the Mg 50 Si 15 Ni 50 /TE/Mg 50 Si 15 Ni 50 device, the Seebeck coefficient, the efficiency, and power output showed no change with aging time when aging was carried out under in an Mg vapor. The present observations showed that a stable interface can be attained when Mg 50 Si 15 Ni 50 is used as a barrier for the Mg 2.05 Si 0.98 Bi 0.02 TE material .
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ACS Applied Energy Materials
·
2021
·
IF 6.024
Shuyao Li,Junhua Jiang,Zheng Ma,Yanqun Chen,Lanwei Li,Jianli Wang,Chao Wang
As we all know, the introduction of porous structure into the matrix is a very effective method to enhance the material’s thermoelectric performance. Herein, Er-doped Bi0.46Sb1.54Te3 bulk materials were successfully synthesized by high-energy ball milling and spark plasma sintering. The carrier mobility is enhanced and the carrier concentration is optimized by Er doping, thereby improving the electrical transport properties. Furthermore, the dispersed secondary phase nanoparticles and pores introduced by Er doping provide additional phonon scattering, which leads to the decreased lattice thermal conductivity. Finally, the Erx(Bi0.23Sb0.77)2–xTe3 (x = 0.02) sample shows a maximum ZT value of 1.21 at 350 K, and the average ZT value of 1.17 between 300–400 K is achieved.
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高影响因子
Journal of Environmental Chemical Engineering
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2021
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IF 5.909
Haibo Li,Haojun Li,Zhennan Zhou,Hua Tong,Bei Long,Wei Liu,Weihua Li
The improvements of light absorption , charge separation and conductivity are the most common methods to enhance the degradation performance of photocatalysts. But the enhancement of hydrophily of photocatalyst is equally important and the designed approach is rarely reported. Here, a simple method to introduce hydrophilic hydroxyl (-OH) on BiOI is proposed by adding citric acid into the reactive system. Further, the conductive metal Bi is grown on BiOI by in-situ reduction. Benefiting from the elevated hydrophily, specific surface area, conductivity and photoinduced carrier separation efficiency, the optimized catalyst shows the outstanding photodegradation of methyl blue and tetracycline hydrochloride (both >90% removal ratio in 15 min). This work opens up a new way to design the high-performance photocatalyst.
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高影响因子
JOURNAL OF POWER SOURCES
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2021
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IF 9.127
Jiwu Zhao,Lan Xue,Zhenjie Niu,Liang Huang,Yidong Hou,Zizhong Zhang,Rusheng Yuan,Zhengxin Ding,Xianzhi Fu,Xu Lu,Jinlin Long
Sunlight-driven valorization of CO 2 into fuels is a promising solution to renewable energy storage , but the design of an integrated and efficient solar-to-chemical conversion system remains challenging. Herein, an all-solar-driven artificial photosynthetic system (APS) by tailoring photovoltaic-photoelectrochemical cell which can efficiently produce formic acid fuel from CO 2 and H 2 O with bias-free illumination is demonstrated. Guided by density functional theory (DFT) calculations, a BiOI–Bi (BOI–Bi) cathode catalyst is synthesized, which is highly selective for CO 2 to HCOOH conversion, and coupled with a single crystalline argon-treated TiO 2 (TiO 2 -Ar) photoanode, whose valence band edge is beneficial for the oxidation of H 2 O to O 2 . The APS exhibits high product selectivity, robust activity and good durability. A solar-to-HCOOH selectivity of 96.5% is obtained with a HCOOH yield of 108.2 mmol g −1 h −1 under bias-free illumination of AM1.5G. The device can operate stably for at least 12 h. In particular, an apparent photon quantum efficiency of 7.5% and a solar-to-chemical conversion efficiency (η SCC ) of 8.3% are recorded, rivaling all the incumbent precious-metal-free all-solar-driven components for CO 2 -to-HCOOH conversion. This study highlights the potential of BOI-Bi for CO 2 to HCOOH conversion with high selectivity and its integration into APS system to realize carbon-negative solar-to-chemical conversion with industrial relevance.
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高影响因子
RARE METALS
·
2021
·Vol. 41
·期 3
·931-941
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IF 4.003
Guo Jun,Wang Zi-Yuan,Zhu Yu-Ke,Chen Lin,Feng Jing,Ge Zhen-Hua
Bi 2 S 3 is composed of inexpensive and environmental friendliness elements, which has received extensive interests and been investigated as a promising mid-temperature thermoelectric material for years. Even pure Bi 2 S 3 possesses a high Seebeck coefficient and low thermal conductivity, its low electrical conductivity leads to a low figure of merit (ZT) value. In this work, Bi 2 S 3 fabricated by solid-state melting combined with spark plasma sintering can significantly enhance the thermoelectric performance via introducing small amounts of Cu and BiCl 3 . Cu interstitial doping and Cl substitution on S site result in a large increase in electrical conductivity. Additionally, the enhanced phonon scattering is derived from the point defects caused by element doping, the grain boundaries, and the small amount of secondary phase, which leads to the low thermal conductivity. Finally, a high ZT value of 0.7 is obtained at 773 K and reaches a large average ZT of 0.36 in the temperature range from room temperature (RT) to 773 K for the Cu-interstitial-doped and BiCl 3 -alloyed (Cu 0.01 Bi 2 S 3 + 0.175 mol% BiCl 3 ) sample. Furthermore, the mechanical properties of the Cu 0.01 Bi 2 S 3 + 0.175 mol% BiCl 3 sample are lower than those of other Bi 2 S 3 samples, which stem from the weak chemical bonding strength. Graphic abstract
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ChemSusChem
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2021
·Vol. 14
·期 18
·3815-3820
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IF 8.928
Di Li,Wu Tang,Fan Tang,Jiaji Yan,Lvchuan Jing,Chuan Wang,Yichao Yan,Liang Xu,Cong Fan
Graphical One electrode fits all : The polyanionic organic compound 9,10-anthraquinone-2,6-disulfonate is used as a common cathode and metallic bismuth as a common anode to simultaneously assemble low-cost Na-ion and K-ion full cells. The Na-ion full cells deliver a peak discharge capacity of 139 mAh g −1 and the K-ion full cells can show a peak discharge capacity of 130 mAh g −1 at 0.5–3.0 V. Molecule-aggregation organic electrodes in principle have the capability for “single-molecule-energy-storage” in metal-ion rechargeable batteries, which indicates that the same organic electrode can be simultaneously applied to multiple metal-ion rechargeable batteries. In this study, the polyanionic organic compound 9,10-anthraquinone-2,6-disulfonate (Na 2 AQ26DS, 130 mAh g −1 ) is used as a common cathode and metal bismuth (Bi) as a common anode to simultaneously assemble low-cost Na-ion and K-ion full cells. The Na-ion full cells can deliver the peak discharge capacity of 139 mAh g −1 cathode at 0.5–3.0 V, and the K-ion full cells can show the peak discharge capacity of 130 mAh g −1 cathode at 0.5–3.0 V. These results are comparable to the best organic-based Na-ion and K-ion full cells reported to date.
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PubMed
高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
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2021
·Vol. 99
·期 1
·132-139
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IF 2.326
Duan Chenguang,Liu Huating,Huang Zongyu,Qiao Hui,Zhou Yang,Liao Gengcheng,Liu Yundan,Qi Xiang
Electrocatalytic hydrogen evolution is an exercisable way to achieve large-scale application of hydrogen energy. It is of great significance to develop an effect, stable, and cost-effective electrocatalyst. Here, we applied the two-dimensional (2D) bismuth (Bi) to the electrocatalytic hydrogen evolution, and proposed the strategies to enhance the catalytic performance of the catalyst. Due to more active sites located along the edges of 2D structure, Bi nanosheets revealed a higher electrocatalytic activity (overpotential of −958 mV vs RHE at 10 mA cm −2 , Tafel slope of 122 mV/dec) than the bulk counterpart. To further evaluate the electrocatalytic performance of Bi nanosheets, the typical parameters measured in different H + concentration (C[H + ]) are carried out. The improved catalytic activity obtained in 0.5 M H 2 SO 4 is attributed to enhancing the hydrogen adsorption and accelerating the charge transport on the surface of catalyst. Moreover, the durability of Bi nanosheets has been texted, where the current is not evident fluctuation during the 40,000 s electrolysis measurement indicating its excellent stability. The present work expands the application of Bi in the catalysis and provides the simple strategies to improve its hydrogen evolution performance.
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高影响因子
NEW CARBON MATERIALS
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2020
·
IF 1.761
Chi Song,Lin-jie Wang,Si-miao Sun,Ying Wu,Li-jie XU,Lu Gan
A series of ternary composite photocatalysts of Bi 2 O 3 /Bi embedded in porous carbon (Bi 2 O 3 /Bi/PC) was prepared by the high-temperature pyrolysis of a bismuth-based metal organic framework (CAU-17(Bi)). They were used as photocatalysts for the degradation of organic Rhodamine B dye (RhB) in water under visible light. Results showed that the Bi 2 O 3 /Bi/PC composites with different Bi 2 O 3 /Bi ratios could be obtained through changing the extent of the carbothermal reduction of Bi 2 O 3 during pyrolysis. The photocatalystpyrolyzed at 800 o C showed the highest photocatalytic performance and had a wide applicable pH value range and excellent recyclability and stability.The components in the ternary composites exhibited a synergetic effect in the removal of RhB, where Bi 2 O 3 acted as a low-band gap semiconductor, metallic Bi transferred electrons generated by visible light excitation to the graphitic structure in porous carbon to inhibit the recombination of electrons with holes. The holes and peroxide radicals were the main active species. This study provides a new way for the design and preparation of visible-light active and high-performance photocatalysts for organic contaminant degradation in aqueous media by using metal organic frameworks as a multicomponent precursor.
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Journal of Materials Chemistry A
·
2020
·Vol. 8
·期 48
·25746-25755
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IF 11.301
Jianhua Zhu,Jianwen Wang,Guanwu Li,Lu Huang,Mengyang Cao,Yingpeng Wu
The optimized design of size effects and interface effects can enhance the electron/Na-ion migration kinetics for energy-storage materials. Herein, small-size pomegranate-like Bi@C nanospheres (PBCNSs) are synthesized via a simple method and used as the anode of sodium-ion batteries. The composite has a hierarchical structure with ultra-small Bi nanoparticles embedded within carbon spheres which enable fast kinetics and efficient alleviation of stress/strain from the electrodes, and the conductive carbon matrix provides an interconnected electron transportation pathway. Moreover, the hierarchical structure can efficiently prevent the aggregation and pulverization of Bi nanoparticles. The PBCNSs anode delivers excellent sodium-storage performance with an outstanding rate performance (400.3 mA h g−1 at 0.2 A g−1, 372.8 mA h g−1 at 25 A g−1) and long-term cycle stability (340 mA h g−1 after 16 000 cycles at a high current density of 20 A g−1). More importantly, even at a high mass loading of 11.33 mg cm−2, a stable reversible capacity of 327.2 mA h g−1 can be obtained. The mechanism of the high performance was studied by electrochemical measurement and computer simulation.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2020
·
IF 5.774
Junjun Chang,Yuping Li,Feng Duan,Chunlei Su,Yujiao Li,Hongbin Cao
Common methods in capacitive deionization (CDI) for selective removal are derived from membrane separation mechanism or size-based intercalation mechanism. In this study, based on the electrochemical activity of bismuth (Bi) material to chloride ions (Cl − ) and inertness to sulfate ions (SO 4 2− ), Bi electrode is used as anode in CDI to selectively remove Cl − ions from mixed NaCl and Na 2 SO 4 solution. Through the reaction with Bi, Cl − ions are stored in bismuth oxychloride (BiOCl). Results show that Bi electrode exhibits selectivity for Cl − over SO 4 2− with a selectivity coefficient of more than 1.5 in solutions with mole ratio of Cl − to SO 4 2− larger than 1. The selectivity coefficient is greatly dependent on the mole ratio of Cl − to SO 4 2− and increases when the ratio rises. In solution with a fixed Cl − /SO 4 2− mole ratio, higher applied voltage and prolonged time result in higher Cl − ion removal capacity, but not necessarily better selectivity. The highest selectivity coefficient of 4.5 is achieved in 8.5 mM NaCl and 1.1 mM Na 2 SO 4 mixed solution at voltage of 1.6 and 2.0 V after charging for 1 h. These results demonstrate that Bi electrode can selectively remove Cl − ions from mixed solution with a relatively lower concentration of SO 4 2− ions, which provides new insights into ion separation and selective removal by CDI.
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高影响因子
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