HYDROMETALLURGY
·
2024
·
IF 4.8
Wensen Liu,Yahui Liu,Hui Su,Jian Zhang,Pengfei Shi,Jie Liang,Zhaowu Zhu
Base metal hydrometallurgy in a chloride medium has considerable advantages, as metals can be recovered by solvent extraction through a neutral complex mechanism without extra reagent addition , leading to ready lixiviant recycling and significantly reduced wastewater discharge. However, the recovery of Ni(II) using this hydrometallurgical method is challenging because of the unavailability of appropriate extraction reagents. In this study, a new reagent, N-2-ethylhexylpyridine-3-formamide (MEH3), was used to efficiently extract Ni(II) from weakly acidic (pH > 2.5) or neutral chloride solutions in the form of neutral complexes without pH adjustment. Some other metal ions can also be extracted; the selectivity of the reagent for each metal decreased in the following order: Cu(II) > Zn(II) > Ni(II) > Fe(III) > Co(II) > Mn(II). The reagent had weak ability to extract other metal ions such as Ca, Al, Cr(III), Mg, and Li. The extraction of Ni(II) was positively correlated with the Cl − concentration in the aqueous solution, indicating that Cl − is a driving force for Ni(II) extraction. The Ni(II) loaded organic phase was stripped with water, and approximately 50 g/L of Ni(II) in the loaded strip liquor was obtained at an O/A ratio of 15:1. The Ni(II) extraction mechanism was further studied using crystal structure analysis, FT-IR spectroscopy, and the maximum loading capacity. The results showed that a Ni(MEH3) 2 Cl 2 complex was formed via Ni(II) extraction. In conclusion, the MEH3 system can selectively extract Ni(II) from a chloride solution without consuming alkaline reagents, and no new substances are produced, which is beneficial for the realization of mother liquor recycling and has a positive impact on clean hydrometallurgy .
研究领域:
冶金学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Ang Gao,Yong Li,Yinjing He,Can Zheng,Lidan Liu,Zhike Liu,Dapeng Wang,Shengzhong Frank Liu
The quality of organic–inorganic hybrid perovskite films directly affects the application prospect of perovskite solar cells (PSCs), where organic and inorganic cations are the core elements that affect the quality of the perovskite. The additive strategy has been widely used to passivate cation-related defects in perovskite films. Here, the perovskite precursor solution introduced 5-bromopyridine-3-sulfonic acid (BOH) with a potential all-cation passivation function. The experimental results verified that the N atom on pyridine in the BOH molecular structure passivated the defects in perovskite by binding with undercoordination Pb2+, and the sulfonic acid group inhibited nonradiative recombination through their interactions with FA+ and Pb2+, improving perovskite grain size and crystallinity, and enhancing film quality. Thanks to the all-cationic targeted anchoring effect of BOH, the efficiency of the BOH-treated device upgraded from 22.32 to 24.33%. Importantly, PSCs with BOH showed excellent stability after exposure to 25% humidity for 1200 h at room temperature.
研究领域:
材料科学
·
能源技术
·
光伏器件
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NUCLEAR MEDICINE AND BIOLOGY
·
2022
·
IF 2.947
Hongliang Wang,Liu Yang,Keyi Lu,Xiaoshan Guo,Rui Xi,Weixuan Dong,Kaixin Qin,Haiyan Liu,Hua Wei,Yan Cheng,Zhifang Wu,Sijin Li
Objective Given the limitation of biomarkers to predict the renal function progression in diabetic nephropathy , N-(6-[ 18 F]Fluoropyridin-3-yl)glycine (6-[ 18 F]FPyGly) was used to evaluate renal function progression in a rat model of diabetic nephropathy. Methods Twenty male Sprague-Dawley rats were randomly divided into four groups, including the healthy control group (HC group), diabetic nephropathy group (DNM group), routine diet treated diabetic nephropathy group (RDNM group), and high fat/high sucrose -diet-fed diabetic nephropathy group (HDNM group). All renal function parameters were determined from animal PET renograms . P and T max represent the curve peak counts and the time to the curve peak counts of 6-[ 18 F]FPyGly in kidneys after injection, C 1/2 and the 15 min/Peak ratio represent the time from peak to 1/2 peak in the clearance phase, and the ratio of the curve counts at 15 min to the curve peak counts. Results P, T max , C 1/2 , and 15 min/peak ratio of each rat were significantly correlated with S-Cr, BUN . There were significant differences in T max , P, serum creatinine (S Cr), and blood urea nitrogen (BUN) levels between HC and DNM groups. P and the 15 min/Peak ratio were significantly different among DNM, RDNM, and HDNM groups, while T max and C 1/2 were only significantly different between DNM and RDNM or HDNM groups. There only was a significant difference in BUN between the DNM and HDNM groups. Conclusion The renal function parameters P, T max , C 1/2 and 15 min/peak value obtained by dynamic renal imaging based on 6-[ 18 F]FPyGly could reflect changes of renal function in rats, which had a good correlation with S Cr and BUN, and showed more efficient in the diagnosis of diabetic nephropathy and renal function classification than S Cr and BUN.
研究领域:
医学影像
·
核医学
·
糖尿病
·
肾脏生理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COORDINATION CHEMISTRY
·
2019
·
IF 1.685
Yafang Ge,Guoting Li,Dongxia Fu,Lina Liu,Benlai Wu
Two metal–organic frameworks based on a multifunctional ligand 2-(5-bromo-pyridin-3-yl)-1H-imidazole-4,5-dicarboxylic acid (H3L), [Mn(HL)(C2H5OH)]n (1) and {[Zn(HL)(H2O)2]·H2O}n (2), have been hydro/solvothermally synthesized and characterized by IR, elemental analyses, X-ray powder and single-crystal diffractions, and thermogravimetric analyses. In 1, (HL)2– ligands adopt the μ
3-kN,O:kN′,O′:kN′′ coordination mode and use their imidazoledicarboxylates to bis-chelate MnII into left- and right-handed helixes which are further bridged into a mesolayer structure with (4·82) topology through the coordination of their pyridyl groups. In 2, (HL)2– ligands only use their imidazoledicarboxylates to bis-chelate ZnII into linear chains which are further linked into a 2D supramolecular framework through interchain hydrogen–bonding interactions. Interestingly, the structures of 1 and 2 are mainly dominated by the bis-N,O-chelation of the imidazoledicarboxylate in (HL)2–. As for the formation of the imidazoledicarboxylate-bridged helical chains in 1 or straight chains in 2, it largely depends on the cis- or trans-chelation of two imidazoledicarboxylates around the same metal center. Magnetostructural analysis of 1 discloses that the bis-N,O-chelating imidazoledicarboxylate of (HL)2– transmits antiferromagnetic interactions along the imidazoledicarboxylate-bridged helical chain with the spin-coupling constant of –0.71 cm–1. Additionally, 2 emits greatly enhanced blue fluorescence mainly originating from the intraligand charge transition.
研究领域:
材料科学
·
化学
·
配位化学
·
晶体工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Long Tian,Xiaonan Song,Yi Liu,Churu Zhang,Lan Shi,Qinglin Chen,Yanyan Deng,Weigang Cui,Shaoyun Shan,Tianding Hu
Defect-engineered metal–organic frameworks (DEMOFs) are emerging advanced materials. The construction of DEMOFs is of great significance; however, DEMOF-based catalysis remains unexplored. (E)-vinylboronates, an important building block for asymmetric synthesis, can be synthesized via the hydroboration of alkynes. However, the lack of high-performance catalysts considerably hinders their synthesis. Herein, a series of DEHKUST-1 (HKUST = Hong Kong University of Science and Technology) (Da–f) catalysts with missing occupation of linkers at Cu nodes were designed by partially replacing benzene-1,3,5-tricarboxylate (H 3 BTC) with defective connectors of pyridine-3,5-dicarboxylate (PYDC) to efficiently promote the hydroboration of alkynes. Results showed that the Dd containing 0.8 doping ratio of PYDC exhibited remarkable catalytic activity than the defect-free HKUST-1. This originated from the improved accessibility for reactants towards the Lewis acid active Cu sites of DEHKUST-1 due to the presence of plenty of rooms next to the Cu sites and enhanced coordination ability in such ‘defective’ HKUST-1. Dd had high selectivity (>99 %) and yield (>96 %) for (E)-vinylboronates and extensive functional group compatibility for terminal alkynes. Density functional theory (DFT) calculations were performed to elucidate the mechanism of hydroboration. Compared with that of defect-free HKUST-1, the low energy barrier of DEHKUST-1 can be attributed to the lower coordination number of Cu sites and enhanced accessibility of Cu active sites towards reagents.
研究领域:
材料科学
·
催化
·
化学工程
·
理论化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2013
·
IF 3.535
Meng Li,Hongmei Yang,Chao Ma,Yan Zhang,Shenguang Ge,Jinghua Yu,Mei Yan
In this paper, a novel and sensitive signal-off electrochemiluminescence (ECL) aptasensor was proposed for the detection of adenosine triphosphate (ATP) on a nanoporous gold (NPG) modified glassy carbon electrode. The NPG was easily synthesized by a selective dissolution of silver from silver/gold alloy in nitric acid . The ECL aptasensor consisted of two main elements: an ECL substrate, made by modifying the amino group functionalized Ru(bpy) 3 2+ -doped silica (Ru-silica), and an ECL intensity switch, which contains two probes, split from one aptamer. The first probe (ssDNA1) was functionalized with a thiol group at one end and attached to Ru-silica through the linking agent of N-succinimidyl-4-(N-maleimidomethyl)cyclohexane-1-carboxylate. The other one (ssDNA2) is ferrocene-labeled probe, which was functionalized with ferrocene tag at the amino group functionalized end. We demonstrated that the ssDNA1/ATP/ssDNA2 sandwich composites layer could be formed in the presence of ATP, and lead to a quenching of Ru(bpy) 3 2+ . However, only a slight decrease could be observed in the absence of ATP. Under optimal conditions, the proposed biosensor provided a wide linear response range over 0.1 pmol L −1 –10.0 nmol L −1 with a detection limit of 0.03 pmol L −1 .
研究领域:
分析化学
·
生物化学
·
纳米技术
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
BIOELECTROCHEMISTRY
·
2022
·
IF 5.76
Cuiying Lin,Qingqing Huang,Xiang Hong,Shichai Hong,Xiaolong Shu,Enci Wang,Lixin Wang,Weiguo Fu,Zhenyu Lin
Vascular endothelial growth factor (VEGF 165 ) is a signal protein that plays a central role in the regulation of angiogenesis and can stimulate angiogenesis. The development of highly sensitive and selective detection method for VEGF 165 is very important for disease diagnosis and follow-up treatment monitoring. In this study, an electrochemiluminescence (ECL) aptasensor for VEGF 165 has been developed based on quench of H 2 O 2 toward Ru(bpy) 3 2+ /TPrA ECL system and RecJ f exonuclease induced target recovery and hybridization chain reaction (HCR) as amplification strategy. The presence of VEGF 165 makes a large number of glucose oxidase (GOD) fixed on the electrode surface through the double signal amplification strategies. The present of GOD cause the production of a large amount of H 2 O 2 near the electrode surface under excess amount of glucose, resulting in the inhibition of the ECL signal of Ru(bpy) 3 2+ /Au nanoparticles (Ru(bpy) 3 2+ /AuNPs) film fixed on the electrode surface. The ECL response of the designed biosensor has a good linear relationship with the logarithm of the concentration of VEGF 165 in the range of 0.5 pg/mL to 500 ng/mL with a detection limit of 0.2 fg/mL. The VEGF 165 in serum samples has been detected by the proposed aptasensor with satisfactory results.
研究领域:
生物传感器
·
分析化学
·
生物医学工程
·
分子生物学
·
临床诊断
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）