CHEMOSPHERE
·
2022
·
IF 8.943
Danping Wu,Quan Chen,Min Wu,Peng Zhang,Liping He,Yihui Chen,Bo Pan
The reactivity of pyrogenic carbon has attracted a great deal of research attentions recently. The oxygen-containing structures are rich on the surface of biochars, and involved in accepting and donating electrons during the interactions between biochar and organic contaminants . In this work, the species and content of oxygen-containing functional groups on biochar surface were regulated through chemical modification, and batch sorption/degradation experiments were carried out for rhodamine B (RhB). Based on the comparison of surface functional groups, biochars produced below 200 °C mediated RhB degradation through phenol hydroxyl group, while semiquinone and carboxylic acid groups were the main reaction active sites for biochars produced at higher than 500 °C. Considering that various biochar properties play roles in mediating organics degradation , the strategies in manipulating biochar properties should be carefully considered.
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高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2020
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IF 3.232
Jiwen Hu,Xili Yu,Xin Zhang,Changcheng Jing,Tingting Liu,Xiaochun Hu,Senlin Lu,Kajsa Uvdal,Hong-Wen Gao,Zhangjun Hu
A rhodamine B-based sensor ( RS ) was designed and synthesized by a combination of the spirolacton rhodamine B (fluorophore) and multidentate chelates (ionophore) with high affinity towards Hg 2+ . In the presence of Hg 2+ , the resulting red-orange fluorescence (under UV light) and naked eye red color of RS are supposed to be used for quantitative and qualitative measurement of Hg 2+ . Further fluorescent titration and analysis demonstrate that RS can selectively detect Hg 2+ within 1 s with a low limit of detection (LOD) of 16 nM in acetonitrile media, meanwhile, the association constant (K a ) was calculated to be 0.32 × 10 5 M −1 . More importantly, the resultant complex ( RSHg ) of RS and Hg 2+ has also been successfully applied to detect limited water content in acetonitrile solution.
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高影响因子
Journal of Inorganic and Organometallic Polymers and Materials
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2021
·Vol. 31
·期 5
·2129-2139
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IF 3.543
Li Xiansong,Liu Shiquan
Iron oxide-silica hybrid xerogels were repeatedly synthesized using the liquid recovered during the drying of wet gels obtained in the previous run. The hybrid xerogels were characterized by SEM, FT-IR, and N 2 -sorption, DR UV–Vis techniques. The results indicate that the hybrid xerogels possess high surface areas from 514 to 601 m 2 /g with highly dispersed Fe species. The synthesized iron oxide-silica hybrid xerogels showed high adsorption capacity and Fenton-like catalytic activity toward Rhodamine B in aqueous solution over a wide pH range of 3–11. It was demonstrated that the hybrid xerogels remained excellent recyclability and stability for 5 cycles, with above 99% of the degradation efficiency being achieved and low iorn-leaching per cycle.
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高影响因子
JOURNAL OF MATERIALS SCIENCE
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2020
·Vol. 55
·期 34
·16171-16183
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IF 3.553
Liu Shengjun,Zou Qichao,Ma Yan,Sun Wen,Li Yu,Zhang Jian,Zhang Cheng,He Lifang,Sun Yudie,Chen Qian,Liu Bo,Zhang Hexin,Zhang Kui
Metal–organic frameworks (MOFs) are a new type of porous crystal materials that have been widely used in various fields. Owing to their adjustable porous structure, MOF photocatalysts with high catalytic activity have become a research hotspot. In this study, NH 2 -MIL-125/CoS x samples were investigated as a novel visible light-responsive catalyst for the removal of organic dye. The NH 2 -MIL-125/CoS x -20 composites showed the best photodegradation efficiency, where photodegradation of the rhodamine B reached 95.4% in 45 min. CoS x was able to effectively extend the wavelength absorption range of NH 2 -MIL-125 and effectively separate the photogenerated electrons and holes and that could lead to the improved photocatalytic performance of the composites. The reactive superoxide radical ( · O 2− ) was identified as the main active species using reactive species capture experiments, and a reasonable photocatalytic mechanism was proposed. This paper is intended to guide the development of organic–inorganic hybrid materials for environmental remediation.
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高影响因子
JOURNAL OF POWER SOURCES
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2016
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IF 6.333
Lingchao Pan,Yonggao Xia,Bao Qiu,Hu Zhao,Haocheng Guo,Kai Jia,Qingwen Gu,Zhaoping Liu
Migration of transition metal (TM) ions to tetrahedral sites plays a crucial role on structural transformation and electrochemical behaviors for Li-rich layered oxides . Here, incorporating small B 3+ in the tetrahedral interstice is employed to block the migration channel of TM ions and stabilize the crystal structure. Benefiting from their good structural stability, Li-rich layered materials with B-doped Li 1.198 Ni 0.129 Co 0.129 Mn 0.535 B 0.01 O 2 and Li 1.196 Ni 0.127 Co 0.127 Mn 0.529 B 0.02 O 2 , exhibit excellent cycling performance and voltage stability. After 51 cycles at 0.2 C, 1 mol.% boron incorporated sample can deliver 211 mAh g −1 with capacity retention of 89.9%, which is much higher than that of the undoped sample of 177 mAh g −1 with the retention of 79.2%. Moreover, the declined voltage per cycle decreases from 3.6885 mV to 2.7530 mV after 2 mol.% boron doping. XRD patterns after extended cycling verified the suppression of the structural transformation by the incorporation of boron.
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高影响因子
CERAMICS INTERNATIONAL
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2021
·
IF 4.527
Shunhang Wei,Jian Gao,Pingru Wu,Bo Yao,Haitao Xu,Yongsheng Tan,Shiyan Liu,Rong Wu,Yawei Wang,Lei Wang,Zebo Fang,Qifeng Liang
Although TiO 2 is a wide band gap semiconductor , it demonstrates photodegradation activity under visible light irradiation after dye sensitization. Compared with esterification between the surface hydroxyl group of TiO 2 and the carboxylic group of dyes, electrostatic interaction between TiO 2 and dye shows better photosensitized performance. In this work, Bi/Al co-doping anatase titania (Ti 1-x Bi 2x/3 Al 2x/3 O 2 (0 ≤ x ≤ 0.3)) is designed to enhance the electrostatic interaction. The effect of Al ions is to enhance the solubility of Bi 3+ into titania nanocrystals . A new band gap is generated after high concentration of Bi element doping , which not only promotes the absorption of visible light, but also improves the utilization of photogenerated carriers. Based on the results of transmission electron microscopy , light absorption, photodegradation activity and density functional theory calculations, it is found that bismuth dopant is the electron capture site. It first accumulates electrons through photocatalytic degradation reaction to enhance electrostatic adsorption between the catalyst and the positively charged dye molecules, and finally realizes high-efficiency photosensitization degradation of Rhodamine B. In addition, the sensitized titania has excellent photodegradation recyclability.
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高影响因子
RSC Advances
·
2020
·Vol. 10
·期 19
·11210-11218
·
IF 3.119
Yan Zhang,Fengsong Qi,Yujian Liu
The high B-doped ordered mesoporous carbon (HPB-OMC) was prepared by using 4-hydroxyphenylboronic acid-modified phenolic resin (HPBPF) as a boron and carbon precursor via the evaporation-induced self-assembly (EISA) approach. The chemical composite, mesoporous structure, and electrochemical properties of the as-prepared HPB-OMC are investigated. The results show that both highly boron-doped and well-ordered mesoporous structure are achieved for HPB-OMCs, owing to the improvement of solubility of the resins in ethanol, and the enhancement of thermal stability of pore channels during carbonization. Moreover, the HPB-OMCs exhibit an ideal electric double-layer capacitor performance. With the increase of the B-doped content, the specific capacitance of the HPB-OMC electrode rises gradually, then drops off a little. The HPB-OMC with a high B content (3.96 wt%) shows a much high specific capacitance of 183 F g−1 at a current density of 1 A g−1, suggesting its promising application in the field of supercapacitors.
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高影响因子
CHEMICAL PHYSICS LETTERS
·
2023
·
IF 2.8
Yajie Wang,Xiaoyan Gan,Wei Zheng,Liling Guo,Hanxing Liu
Halide double perovskite Cs 2 AgBiBr 6 hinders its wide range of optoelectronic applications due to large band gap. This work focuses on Sb 3+ /In 3+ doping to tune the band gap of Cs 2 AgBiBr 6 thin films. The influences of annealing temperature and doping amount of Cs 2 Ag(B x Bi 1-x )Br 6 (B = Sb 3+ , In 3+ ) thin films were investigated. When annealed at the optimized temperature of 150 °C, the Cs 2 Ag(B x Bi 1-x )Br 6 (B = Sb 3+ , In 3+ ) thin films accommodate up to 100% Sb 3+ and 70% In 3+ , respectively, without showing any secondary phases. The band gap of Cs 2 Ag(B x Bi 1-x )Br 6 (B = Sb 3+ , In 3+ ) thin films decreases as the increase of Sb 3+ and increases as the increase of In 3+ amount. Therefore, the band gap regulation of 0.39 eV is realized, with the smallest value of 2.25 eV for Cs 2 AgSbBr 6 and highest value of 2.64 eV for Cs 2 Ag 0.3 In 0.7 Br 6 , respectively. Our work confirms an approach to realize band gap adjustment of Cs 2 AgBiBr 6 thin films.
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高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2021
·Vol. 168
·期 12
·123509
·
IF 4.316
Xianglin Liu,Yongsong Ma,Peng Li,Huayi Yin,Dihua Wang
MoB2 is synthesized by the electrochemical reduction of solid MoS2/B mixture in molten NaCl-KCl at 700 °C. Unlike the traditional methods, the electrolysis method employs the low-cost MoS2 feedstock and the boronization reaction happens at a low temperature of 700 °C. The electrochemically induced boronization involves two steps: the electrochemical desulfurization to generate Mo and the reaction of Mo with B to form MoB2. The S2− released from the reduction of MoS2 transfers to the carbon anode and is oxidized to sulfur gas, realizing a green synthetic process. In addition, the influences of molar ratio of MoS2 and amorphous boron and electrolysis cell voltage on the phase composition and morphology of electrolytic products were studied. The obtained MoB2 particles possess a uniform nodular morphology. Overall, this paper provides a straightforward and green process to prepare MoB2 nanoparticles using economically affordable raw materials at low temperature, and this method can be extended to prepare other borides.
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高影响因子
CORROSION SCIENCE
·
2020
·
IF 6.479
Tao Feng,Mingde Tong,Shuotian Yao,Hejun Li,Hongjiao Lin,Shifeng Wen,Peipei Wang
The B-modified SiC/HfC-SiC composites were prepared by the combination of precursor infiltration and pyrolysis (PIP) and chemical vapor deposition (CVD) methods. The microstructure, cyclic ablation and bending strength tests of the SiC/HfC-SiC composites with and without B were investigated. The results showed that the B-modified composites had a better cyclic ablation resistance than that of the composites without B. The effective residual thickness of the B-modified composites was also higher than that of the composites without B after cyclic ablation. The residual bending strength of the B-modified composites was slightly lower than that of the composites without B.
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高影响因子
TALANTA
·
2021
·
IF 6.057
Huazheng Yu,Yanhong Li,Aisheng Huang
Sialic acid (SA) is a crucial component of glycoproteins and glycolipids on the cellular membrane, which is essential for maintaining the function of cell membranes, such as cell recognition and communication. Simultaneously, sialic acid plays a significant role in many physiological and pathological processes. Hence, it is urgent to develop a simple and sensitive strategy for determining sialic acid. In this work, a new metal-organic framework called UiO-66-NH 2 @B(OH) 2 has been designed and synthesized for the recognition and detection of sialic acid. The boronic acid functional group in UiO-66-NH 2 @B(OH) 2 can bind to a diol moiety of the glycerol side chain of sialic acid, which will attenuate or even quench the fluorescence of UiO-66-NH 2 @B(OH) 2 , thus opening a new road to detect sialic acid. Based on the measurement results, sialic acid can be quantitatively measured in a linear range of 0.05–2.5 mmoL/L with the UiO-66-NH 2 @B(OH) 2 probe. The detection limit of sialic acid is as low as 0.025 mmol/L. Furthermore, the boronic-acid functionalized probe UiO-66-NH 2 @B(OH) 2 displays high sensitivity and high selectivity to recognize the sialic acid in mouse serum samples. Therefore, the developed UiO-66-NH 2 @B(OH) 2 can be used as a promising probe to identify and detect sialic acid in the practical application.
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高影响因子
OPTICAL MATERIALS
·
2022
·
IF 3.754
Hao Hu,Chengdong Xu,Jiacheng Jin,Mingchen Xu,Yue Cheng,Weiwei Ji,Zhencen Ding,Min Shao,Yushan Wan
In this paper, BiOIO 3 and Bi 2 O 4 nanosheet monomers were synthesized and used to prepare several BiOIO 3 /Bi 2 O 4 composites by an ultrasonic impregnation method. The resulting photocatalytic materials were characterized by XRD , SEM, TEM, XPS , FTIR, PL , UV–Visible diffuse reflectance spectroscopy (DRS), and BET. The photocatalytic activity of the BiOIO 3 /Bi 2 O 4 composites was evaluated by the degradation of rhodamine B (RhB) and ciprofloxacin (CIP) under simulated sunlight and compared to the activities of BiOIO 3 and Bi 2 O 4 operating alone. The results showed that Bi 2 O 4 was closely attached to the surface of BiOIO 3 , and the composite had a good degradation effect on RhB and CIP, with the best performing material being a 0.9-BiOIO 3 /Bi 2 O 4 composite, which achieved 97.6% degradation of RhB within 60 min and 85.6% degradation of CIP within 120 min. The observed degradation performance was considerably higher than that of other composite samples and monomers due to the good energy level matching of the BiOIO 3 /Bi 2 O 4 composite, which broadened the light response interval, improved the electron transfer rate and enhanced the photocatalytic activity. Free radical capture experiments showed that the ·O 2 - and h + free radicals significantly contributed to the degradation of pollutants. Cyclic tests showed that the composite also had good stability. The results of this study showed that bismuth-based photocatalysts might be used for environmental remediation.
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高影响因子
危险品化学品经营许可证（带存储）