CRYSTAL GROWTH & DESIGN
·
2023
·
IF 3.8
Muhammad Younis,Hao Wu,Li Yang,Luji Li,Hongda Li,Wenfeng Zhang,Haixin Chang
Most of topological crystalline insulators show no presence of intrinsic ferromagnetism at and above room temperature. Here, we report the Cr0.03Pb0.02Sn0.05Te0.1 ferromagnetic crystal prepared through the modified Bridgman route that possesses intrinsic above room-temperature ferromagnetism with Tc ∼335 K and magnetic moments ∼8.85 emu/g. The presence of the anomalous Hall effect in Cr0.03Pb0.02Sn0.05Te0.1 crystals verifies above room-temperature intrinsic ferromagnetism, indicating a great potential of the Cr0.03Pb0.02Sn0.05Te0.1 crystal for many spintronic and topological devices.
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高影响因子
Nanomaterials
·
2023
·Vol. 13
·期 11
·1767
·
IF 5.3
Wenqin Lai,Yating Liu,Mingming Zeng,Dongmei Han,Min Xiao,Shuanjin Wang,Shan Ren,Yuezhong Meng
The rapid development of electrochemical CO2reduction offers a promising route to convert intermittent renewable energy into products of high value-added fuels or chemical feedstocks. However, low faradaic efficiency, low current density, and a narrow potential range still limit the large-scale application of CO2RR electrocatalysts. Herein, monolith 3D bi-continuous nanoporous bismuth (np-Bi) electrodes are fabricated via a simple one-step electrochemical dealloying strategy from Pb-Bi binary alloy. The unique bi-continuous porous structure ensures highly effective charge transfer; meanwhile, the controllable millimeter-sized geometric porous structure enables easy catalyst adjustment to expose highly suitable surface curvatures with abundant reactive sites. This results in a high selectivity of 92.6% and superior potential window (400 mV, selectivity > 88%) for the electrochemical reduction of carbon dioxide to formate. Our scalable strategy provides a feasible pathway for mass-producing high-performance and versatile CO2electrocatalysts.
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高影响因子
TALANTA
·
2023
·
IF 6.1
Jinpeng Liu,Yanhui Bi,Wenjun Tai,Yong Wei,Qiang Zhang,Anna Liu,Qiongzheng Hu,Li Yu
Due to the serious risks of lead pollution to human health, it plays a great role in constructing a simple, inexpensive, portable, and user-friendly strategy for Pb 2+ detection in environmental samples. Herein, a paper-based distance sensor is developed to detect Pb 2+ assisted with the target-responsive DNA hydrogel. Pb 2+ can activate DNAzyme to cleave its substrate strand, which results in the hydrolysis of the DNA hydrogel. The released water molecules trapped in the hydrogel can flow along the patterned pH paper due to the capillary force. The water flow distance (WFD) is significantly influenced by the amount of water released from the collapsed DNA hydrogel triggered by the addition of various Pb 2+ concentrations. In this way, Pb 2+ can be quantitatively detected without using specialized instruments and labeled molecules, and the limit of detection (LOD) of Pb 2+ is 3.0 nM. Additionally, the Pb 2+ sensor works well in lake water and tap water. Overall, this simple, inexpensive, portable, and user-friendly method is very promising for quantitative and in-field detection of Pb 2+ with excellent sensitivity and selectivity .
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 47
·期 3
·1247-1255
·
IF 3.925
Kun-Lang Lu,Xian-Yong Wei,Fa-Zhan Mao,Zhi-Juan Zhu,Zhuang Li,Fan Yin,Jia-Hao Li,Zhi-Min Zong
Nitrogen and sulfur co-doped porous carbon (NSCDPC) was prepared using a one-step method using a purple-leaf plum kernel shell, potassium benzoate, and N,N′-diphenylthiourea (DPTU) as the carbon precursor, the activator and the nitrogen and sulfur source, respectively. The use of potassium benzoate with weak alkalinity and causticity facilitates obtaining abundant microporous structures and heteroatoms. Meanwhile, the dopant N,N′-diphenylthiourea plays a synergic activation role. The optimal layer-stacked NSCDPC750-1 exhibits abundant ultramicropores and defect sites, developed interconnected channels, a large specific surface area, and rich nitrogen and sulfur contents, resulting in excellent electrochemical performance. As expected, NSCDPC750-1 exhibits a high specific capacitance of 338 F g−1 at 0.5 A g−1 in 6 M KOH electrolyte, an outstanding rate performance with 280 F g−1 at 20 A g−1, and remarkable durability with 92.3% retention after 10 000 cycles. In addition, a symmetric supercapacitor assembled with NSCDPC750-1 as the electrode and 6 M KOH as the electrolyte possesses an outstanding specific capacitance of 111 F g−1 at 0.5 A g−1, an excellent rate capability, and a high energy density of 30.22 W h kg−1. The impressive electrochemical performance makes NSCDPC750-1 a promising supercapacitor electrode material.
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 12
·e53638
·
IF 3
Yao-Shen Guo,Cheng Chen,Chun-Er Lin,Li-Ping Zhu,Hong-Xing Liu
Dichloroacetic acid (DCAA), one of the disinfection by-products in water, has showed critical harm to human health since it can cause cancer, teratogen and mutagen. Herein, a quaternized hollow fiber membrane was fabricated by ring-open reaction via a facile one-step immersion method, which could fast adsorb DCAA by flow-through adsorption. The obtained membrane with a sponge pore structure, which was quaternized at 60°C in an alkaline solution, exhibited excellent adsorption performance with removal percentage of 100%, life span up to 100 L and treating capacity of 24.8 mg m −2 . Meanwhile, the optimal membrane exhibited the exceptional performance in a neutral test solution compared with acid or alkaline test solution. It was concluded that electrostatic attraction between positively charged quaternary ammonium groups and negatively charged DCAA was responsible for the adsorption mechanism. Additionally, fitting results indicated that the adsorption of DCAA onto the membrane was mainly dominated by homogeneous monolayer adsorption. This work developed a facile approach to prepare a novel quaternized membrane with outstanding adsorption performance, which demonstrated huge potentials in the molecular separation and water purification fields.
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JOM
·
2022
·Vol. 75
·期 5
·1515-1529
·
IF 2.597
Ge Yang,Liu Zhihong,Yu Zhiqian,Wang Huanwen,Lu Xingwu,Zhang Leru,Xia Longgong
The present study focused on the Cu-Pb system and investigating the distribution behaviors of various minor elements through the equilibration-quenching-EPMA analysis experimental technique. Obtained results showed that: (1) An intermetallic compound consisting mainly of Cu-Pb-Se-Te formed below 956°C. (2) As, Sb and Sn had similar distribution behaviors, which mainly entered the solid Cu phase at the temperature range of 500–900°C, but became concentrated in the liquid alloy phase at temperature range of 900–1060°C, and their distribution ratios increased along with increasing temperature. (3) Bi was mainly found in the liquid alloy phase, and its distribution ratio ranged from 6.8 to 836.5 at the experimental conditions. (4) Se and Te formed an intermetallic alloy phase under 900°C, and they enriched in the liquid alloy phase between 960°C and 1060°C. (5) Au was mainly found in the solid Cu phase at the temperature range of 500–900°C, and its distribution ratio was about 1.5 at 900–1060°C. The distribution ratio of Ag decreased from 8.7 to 2.3 when increasing the temperature from 500°C to 1060°C. Distribution behavior of As, Sb, Bi and Sn is consistent with their interfacial enthalpies with Cu and Pb.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2022
·
IF 9.221
Kaiqi Liu,Luminita Marin,Xinjian Cheng
In this work, fluorescent β- cyclodextrin (β-CD) based probes containing naphthalimide group were synthesized to realize the specific recognition of Hg 2+ /Hg + in aqueous system. Firstly, three small fluorescent molecules (N1, N2 and N3) with -NH 2 groups were synthesized from 4-bromo-1, 8-naphthalene anhydride . Secondly, CH CCH 2 - group was introduced into β-CD by Williamson ether formation reaction. Finally, the target probes (β-CD-PI, β-CD-PY and β-CD-TP) were obtained by Amino-Yne click reaction. These probes can efficiently recognize Hg 2+ /Hg + . β-CD-PI emits bright yellow fluorescence after binding with Hg 2+ /Hg + , which is a turn-on fluorescent probe . When the Hg 2+ /Hg + concentration exceeds 26 μM, the fluorescence intensity amplifies sharply (20 folds). The hydrophobic parts of the probes aggregated together to form a micelle-like structure due to complexation with Hg 2+ /Hg + , resulting in special micelle-sensitizing properties. Meanwhile, the HOMO-LUMO energy levels of the probes were calculated by cyclic voltammetry (CV). The probe is expected to be used for the detection of Hg 2+ /Hg + in aqueous solutions without any organic solvents.
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Molecular Catalysis
·
2023
·
IF 4.6
Shuxing Zhang,Jiali Zheng,Zhihui Li,Xiaoshu Ding,Yanji Wang
Herein, we reported a green catalytic reaction system for the synthesis of 5-amino-1-pentanol with furfural and ionic liquid hydroxylamine salt as the initial raw material. In addition, the method can obtain 2-furonitrile and furfurylamine in high yields. The reaction system comprises three new reactions, including the reaction of furfural with ionic liquid hydroxylamine salt to synthesize 2-furonitrile, the hydrogenation of 2-furonitrile to prepare furfurylamine, and the hydrogenolysis of furfurylamine to prepare 5-amino-1-pentanol. For the synthesis of 2-furonitrile, ionic liquid hydroxylamine salt (NH 2 OH) 2 ·[HSO 3 - b - mim ]·HSO 4 was prepared. The ionic liquid as co-solvents, catalysts, and hydroxylamine stabilizer has recovery and reusability. For the hydrogenation of 2-furonitrile to furfurylamine, high-efficiency Ru/g-C 3 N 4 catalyst was prepared. For the hydrogenolysis of furfurylamine to 5-amino-1-pentanol, high-efficiency Pt/ZrO 2 catalyst was prepared. Finally, the yield of 5-amino-1-pentanol based on furfural was 48.7%. A potential pathway for preparing drugs from biomass has been identified in this work.
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JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2022
·
IF 6.364
Qiqiang Zhang,Bo Wen,Jia Luo,Yanchun Zhou,Xingyuan San,Yiwang Bao,Qingguo Feng,Salvatore Grasso,Chunfeng Hu
In this paper, we combine rare earth element Sc and lead-containing MAX to predict a new ternary layered MAX phase Sc 2 PbC. Sc 2 PbC with a purity of 87.40 wt% was successfully synthesized by spark plasma sintering , and its crystal structure and atomic positions were obtained by X-ray diffraction (XRD). The Rietveld refinement results show that Sc 2 PbC belongs to a typical MAX phase P6 3 /mmc (No.194) space group with lattice parameters of a = 3.4003(7) Å and c = 14.7475(3) Å, where Sc atom is located at (1/3, 2/3, 0.57958), Pb atom is located at (1/3, 2/3, 1/4), and C atom is located at (0, 0, 0). At the same time, we observed the typical MAX phase layered microstructure in Sc 2 PbC bulk using a scanning electron microscope (SEM). In addition, the proportion of elements measured by energy dispersive spectroscopy (EDS) is within the allowable error range, which confirms that Sc 2 PbC is a new MAX phase compound.
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高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Kejia Kang,Bo Yu,Guanyu Deng,Pei Wang,Jian Yin,Hongbo Zhang,Guoqiang Luo,Hao Song
Copper impregnated carbon/carbon composite (Cu-C/C composite) was fabricated for novel sliding collector material by weaving carbon fiber, heat treatment and Cu alloy impregnation. The effects of counterpart materials (Fe ball and Cu ball) on friction and wear behaviors were investigated and compared with the result of carbon contact strip used in high-speed railway. Morphology, chemical composition, phase and structure of wear surface and tribolayer were characterized to clarify tribological mechanisms. The results show that friction coefficient follows the order: Cu-C/C composite/Cu ball > carbon contact strip/Fe ball > Cu-C/C composite/Fe ball > carbon contact strip/Cu ball. The carbon crystalline of wear surface appears preferred orientation along the sliding orientation, which is benefit for boundary lubrication . When the counterpart material is Fe ball, Cu-C/C composite is superior to pure carbon strip in mechanical strength , electrical conductivity , wear resistance and friction performance.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2023
·
IF 4.4
Boxu Wang,Zheng Liu,Zhihong Li,Ningyi Xu,Xuejiao Zhang,Ruifang Su,Junyang Wang,Rui Jin,Chunyan Sun
Hg 2+ is highly toxic to human health and ecosystem. In this work, based on the unique fluorescent property of 2-Aminopurine (2-AP), the formation of T-Hg 2+ -T mismatch structure and the signal amplification of exonuclease III (Exo III) assisted target cycle, a fluorescent probe for facile and sensitive detection of Hg 2+ is constructed. The hairpin-looped DNA probe is rationally designed with 2-AP embedded in the stem and thymine-rich recognition overhangs extended at the termini. The cleavage of the double stranded DNA stem with stable T-Hg 2+ -T pairs catalyzed by Exo III is prompted to happen upon recognition of trace Hg 2+ . Under the optimal reaction conditions, there is an excellent linear relationship between Hg 2+ concentration and fluorescence intensity in the range of 7.5–200 nM with a detection limit of 0.38 nM. In addition, the detection results of Hg 2+ in Songhua River water and fish samples are satisfactory. The fluorescent probe avoids labeling additional quenchers or quenching materials and has strong anti-interference ability. Thus, the fluorescent probe has a broad prospect in practical application.
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高影响因子
ADVANCED MATERIALS
·
2023
·Vol. 35
·期 39
·2303674
·
IF 29.4
Wenxiao Zhang,Haobo Yuan,Xiaodong Li,Xuemin Guo,Chunyan Lu,Acan Liu,Hui Yang,Lin Xu,Xueliang Shi,Zhiwei Fang,Haibo Yang,Ya Cheng,Junfeng Fang
Tin-lead (Sn-Pb) perovskite solar cells (PSCs) with near-ideal bandgap still lag behind the pure lead PSCs. Disordered heterojunctions caused by inhomogeneous Sn/Pb ratio in the binary perovskite film induce large recombination loss. Here, an Sn-Pb perovskite film is reported with homogeneous component and energy distribution by introducing hydrazine sulfate (HS) in Sn perovskite precursor. HS can form hydrogen bond network and coordinate with FASnI 3 thus no longer bond with Pb 2+ , which reduces the crystallization rate of tin perovskite to the level of lead analog. The strong bonding between SO 4 2− and Sn 2+ can also suppress its oxidation. As a result, the Sn-Pb PSCs with HS exhibit a significantly improved V OC of 0.91 V along with a high efficiency of 23.17%. Meanwhile, the hydrogen bond interaction network, strong bonding between Sn 2+ and sulfate ion also improve the thermal, storage, and air stability of resulting devices.
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