Nature Communications
·
2013
·Vol. 4
·期 1
·1-7
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IF 10.015
Tang Xinjun,Zhu Can,Cao Tao,Kuang Jingqiang,Lin Weilong,Ni Shengjun,Zhang Jiasheng,Ma Shengming
Allenes are important building blocks in organic synthesis and have attracted much attention from researchers worldwide. So far, mono- and 1,3-disubstituted allenes can be prepared easily by applying the allenylation of terminal alkynes reaction of aldehydes. However, trisubstituted allenes have never been reported using this reaction due to the extremely low reactivity of ketones. Here, we report the one-pot synthesis of trisubstituted allenes from terminal alkynes and ketones utilizing cadmium iodide as the mediator. With this protocol, a series of different allenes, including 1,5-bisallenes and optically active allenols, which are especially important in synthetic chemistry, have been successfully prepared.
研究领域:
有机化学
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合成化学
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DOI
PubMed
高影响因子
Materials Chemistry Frontiers
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2025
·
IF 6.4
Lijie Qi,Yu Fu,borui ji,Bauyrzhan Sarsenbekuky,Wanli Kang,Hongbin Yang,Shujun Liu
Electrochemical synthesis of ammonia (NH₃) through cathodic nitrate reduction presents an effective alternative to the Haber-Bosch process, enabling efficient ammonia production without significant environmental pollution. Electrocatalytic degradation strategy is an efficient and environmentally friendly tool for the treatment of oily wastewater containing partially hydrolized polyacrylamide (HPAM). Thus, coupling cathodic nitrate reduction with anodic HPAM oxidation can further enhance ammonia synthesis efficiency and HPAM degradation efficiency. Here, we reported an N-doped carbon nanotube loaded with CuNi-x (X = 0.5, 1, 2) as an electrocatalyst for cathodic nitrate reduction coupled with anodic HPAM oxidative degradation. Notably, the CuNi-1 variant achieved the highest ammonia yield of 4962.76 ± 40.22 μg h-1 mgcat-1 and a Faradaic efficiency of 85.91 ± 0.42%. Furthermore, the oxidative degradation rate of HPAM reached a maximum of 81.91 ± 0.36% within 2 h. Anodic HPAM oxidation not only promotes cathodic nitrate reduction but also enables the acquisition of valuable anodic products. Using in-situ ATR-SEIRAS, in-situ DEMS, and DFT calculations, we thoroughly analyzed reaction intermediates and the critical role of the CuNi bimetallic system in electrocatalytic nitrate reduction. The coupled reaction system was established to achieve both efficient ammonia synthesis and HPAM degradation.
研究领域:
环境科学
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材料科学
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电化学
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DOI
高影响因子
MICROCHEMICAL JOURNAL
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2024
·
IF 4.9
Linghui Tang,Yue Wang,Wenwen Yu,Yan Dong,Yasushi Hasebe
Heavy metal ions have significant risks to both environment and human health, and their detrimental effects are irreversible. Therefore, a sensor capable of simultaneous detecting heavy metal ions with high accuracy presents a significant challenge. In this work, a conductive hydrogel was synthesized using 2-acrylamido-2-methyl-1-propanesulfonic acid (AMPS), methacrylamide (MAM), and hydroxyethyl methacrylate (HEMA) as monomers, N, N’-methylenebis(acrylamide) as the crosslinker, through physically doping with silver nanoparticles. The prepared hydrogel has the characteristics of good conductivity, excellent swelling ability and high adsorption capacity for enrichment of heavy metal ions (HIMs). The three-dimensional network hydrogel was directly used for simultaneous detection of HIMs in multiplex system, with superior separation ability, good linear ranges, excellent reproducibility and good long-time stability. Additionally, this sensor can accurately detect Cu 2+ in river sample, demonstrating high precision and applicability. The fabrication of the hydrogel electrochemical sensor is simple and mild, allowing for the electrochemical capture of various HIMs and holds practical application prospect.
研究领域:
环境科学
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分析化学
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DOI
高影响因子
MICROCHEMICAL JOURNAL
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2026
·
IF 5.2
Jiahui Liu,Xiaorui He,Yue Wang
One-step MXene/CNTs-COOH/CS/IL sensing interface was constructed. • CNTs-COOH alleviated MXene restacking and promoted electron transport. • CS and ionic liquid enhanced metal-ion enrichment and ionic transport. • The sensor simultaneously determined Cd 2+ , Pb 2+ , Cu 2+ , and Hg 2+ . • Real-water results agreed well with ICP-MS measurements. Rationally coordinating ion accessibility, electron transport, metal-ion enrichment, and film stability within a facile electrode architecture remains challenging for multiplex electrochemical analysis. Herein, an MXene-based multicomponent sensing interface was constructed through the one-step integration of carboxylated carbon nanotubes (CNTs-COOH), chitosan (CS), and an ionic liquid (IL) with Ti 3 C 2 T x nanosheets. CNTs-COOH act as conductive nano-spacers that alleviate MXene restacking and improve electronic connectivity, while CS provides coordination-active amino and hydroxyl groups for metal-ion enrichment and contributes to film stability. The incorporation of IL improves component dispersion and ionic transport and partially mitigates the interfacial transport limitation associated with the CS-containing layer. Structural and electrochemical characterization results collectively support complementary roles of the four components in regulating interfacial accessibility, analyte accumulation, and charge-transfer behavior. Under the optimized conditions, the resulting electrode enabled the simultaneous determination of Cd 2+ , Pb 2+ , Cu 2+ , and Hg 2+ by differential pulse anodic stripping voltammetry over linear ranges of 0.5–22.5, 0.5–60, 0.5–87, and 0.5–62 μM, respectively. The corresponding detection limits were 0.1539, 0.0746, 0.2279, and 0.0931 μM. The sensor also exhibited satisfactory selectivity, reproducibility, and long-term stability, retaining approximately 92–95% of its initial response after 30 days. Recoveries of 92.2–96.0% were obtained in spiked tap-water and river-water samples, and the measured concentrations were consistent with those obtained by ICP-MS. These results demonstrate a functionally coordinated interface-engineering strategy for the simultaneous electrochemical determination of multiple heavy metal ions. Download: Download high-res image (139KB) Download: Download full-size image
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2025
·
IF 4.1
Yu Fu,Lijie Qi,Wanli Kang,Saule B. Aidarova,Hongbin Yang,Shujun Liu
The construction of electrocatalytic cathodic nitrate reduction and anodic polyacrylamide (HPAM) oxidation reactions is a promising new electrocatalytic reaction system, which promises simultaneous ammonia synthesis and HPAM degradation. Here, we synthesised an N-doped C nanotube-encapsulated CoNi nano-alloy and used it for electrocatalytic NO 3 − reduction and HPAM oxidation reactions. Therein, CoNi-0.5 could achieve the maximum ammonia yield and Faraday efficiency of 5516.73 ± 66.07 μg h −1 mg cat −1 and 94.71 ± 1.21 %, respectively. Meanwhile, the maximum degradation rate of HPAM was 73.02 ± 1.16 % at 2 h. By In-situ ATR-SEIRAS, in-situ DEMS demonstrated that *NOH is an important reaction intermediate in the ammonia synthesis process, and the bimetallic CoNi alloy can effectively reduce the reaction energy barrier for NO 3 − reduction. This work presents a new strategy for constructing a coupled system for electrocatalytic NO 3 − reduction.
研究领域:
材料科学
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环境科学
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电化学
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DOI
高影响因子
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
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2025
·
IF 1.8
Pengcheng Li,Zhixu Liu,Yaxuan Liu,Xin Wen,Zijian Li,Wei Zhou,Shouyu Wang,Weifang Liu
With excellent optoelectronic behavior, organic-inorganic hybrid perovskites have become leading contenders in the development of future photovoltaic and optoelectronic devices. Herein, two new lead-free, quasi-0D OIHPs, (C 6 H 16 N) 2 ZnI 4 and (C 6 H 16 N) 2 CdI 4 , are synthesized, and both crystallize in the monoclinic system (P2 1 /n space group) as confirmed via single-crystal X-ray diffraction analysis. Optical bandgaps are measured to be 4.595 eV for (C 6 H 16 N) 2 ZnI 4 and 4.255 eV for (C 6 H 16 N) 2 CdI 4 , which align well with those from first-principles calculations. Photoluminescence studies on (C 6 H 16 N) 2 ZnI 4 and (C 6 H 16 N) 2 CdI 4 show peaks at 393 and 382 nm, respectively, which are attributed to self-trapped exciton (STE) transitions induced by lattice distortion. Notably, (C 6 H 16 N) 2 CdI 4 exhibits unusual blue emission (quantum yield: 1.41%, lifetimes: 168.5 ps), while (C 6 H 16 N) 2 ZnI 4 shows blue luminescence with enhanced efficiencies (quantum yields: 19.64%, lifetimes: 473.7 ps). These findings broaden the application prospects of 0D OIHP materials in renewable energy and photonics.
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JOURNAL OF NANOPARTICLE RESEARCH
·
2017
·Vol. 19
·期 12
·1-9
·
IF 2.02
Huang Shan,Pang Guangming,Li Xiangkui,Li Jianping,Pan Hongcheng
Metal-hydroxyquinoline-halogen (MqX, M = Cd, Cu; q = 8-hydroxyquinoline; X = Cl, Br, I) nanowires are synthesized via a sonochemical-assisted method. The elemental analysis (EA), inductively coupled plasma-optical emission spectroscopy (ICP-AES), and X-ray photoelectron spectroscopy (XPS) support an M/q/X ratio of 1:1:1. The electron microscope images reveal a typical CdqX and CuqX nanowire diameter of 30–50 nm and a nanowire length of 400–600 nm. In addition, the synthesis of the MqX nanowires is only observed when there is an excess of halide ions (X/q molar ratio of 3 or greater). This halide deficiency results in the formation of micrometer-sized Mq 2 sheets. We demonstrated the conversion of the MqX nanowires to Mq 2 micro-sheets in an ultrasonic bath of 1 M 8-Hq ethanol solutions (50%, w / w ) at 50 °C for 2 h, but not vice versa. The MqX nanowires exhibited excellent properties for photoluminescence, electrochemiluminescence (ECL), and photoelectrochemistry (PEC). The CdqBr and CdqI nanowires were coated onto a glass carbon and a fluorine-doped tin oxide glass electrode to develop the above ECL and PEC methods for the detection of H 2 O 2 and Cu 2+ , respectively. In the range of 2 to 14 μM, the ECL intensity of the CdqBr nanowires was inversely proportional to the concentration of H 2 O 2 with a detection limit of 0.26 μM. For Cu 2+ sensing, the photocurrent of the CdqI nanowires exhibited a linear response to Cu 2+ over the range of 2 to 16 μM of which a detection limit of 0.2 μM was observed.
研究领域:
材料科学
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分析化学
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DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2018
·Vol. 28
·期 14
·1703369
·
IF 13.325
Youchen Gu,Heping Shen,Chen Ye,Xuezeng Dai,Qian Cui,Jianbao Li,Feng Hao,Xiaojing Hao,Hong Lin
The thin-film photovoltaic material Cu 2 ZnSnS 4 (CZTS) has drawn worldwide attention in recent years due to its earth-abundant, nontoxic element constitution, and remarkable photovoltaic performance. Although state-of-the-art power conversion efficiency is achieved by hydrazine-based methods, effort to fabricate such devices in a high throughput, environmental-friendly way is still highlydesired. Here a hydrazine-free all-solution-processed CZTS solar cell with Na 2 S self-depleted back contact modification layer for the first time is demonstrated, using a ball-milled CZTS as light absorber, low-temperature solution-processed ZnO electron-transport layer as well as silver-nanowire transparent electrode. The inserting of Na 2 S self-depleted layer is proven to effectively stabilize the CZTS/Mo interface by eliminating a detrimental phase segregation reaction between CZTS and Mo-coated soda lime glass, thus leading to a better crystallinity of CZTS light absorbing layer, enhanced carrier transportation at CZTS/Mo interface as well as a smaller series resistance. Furthermore, the self-depletion feature of the Na 2 S modification layer also averts hole-transportation barrier within the devices. The results show the vital importance of interfacial engineering for these CZST devices and the Na 2 S interface layer can be extended to other optoelectronic devices using Mo contact.
研究领域:
材料科学
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光伏技术
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 45
·期 20
·9243-9250
·
IF 3.591
Rufeng Wang,Haiming Zhang,Siqi Han,Yizhi Wu,Zhanning Hu,Guixiang Zhang,Haoxuan Liu,Qingchen He,Xianjing Zhang
The all-inorganic perovskite CsPbIBr2 is a promising material in the photovoltaic (PV) field due to its acceptable optical bandgap and favorable air-stable phase stability. However, the conventional solution-processed poor-coverage thin films make it a challenging task to prepare high-performance solar cells. In this work, we introduce cadmium ions (Cd2+) into CsPbIBr2 perovskite and investigate how this doping treatment would affect the PV performance of the carbon-based CsPbIBr2 all-inorganic perovskite solar cells (FTO/SnO2/CsPbIBr2/carbon). We found that the crystallinity and morphology of CsPbIBr2 thin films are significantly improved after Cd2+ doping, leading to improved light absorption and carrier transportation with reduced carrier recombination in perovskites. The optimized device achieved the highest efficiency of 6.79% in comparison with 4.36% for the device without Cd2+ doping, an increase of 56% in efficiency. Meanwhile, the optimized device with Cd2+ doping exhibited enhanced stability (76% of initial efficiency after 10 hours) in ambient atmosphere. Furthermore, the whole fabrication process of these devices is performed at low temperatures, not more than 160 °C. The present work provides a simple and economical strategy for the fabrication of low-temperature-processed CsPbIBr2 solar cells and the improvement in their performance.
研究领域:
材料科学
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光伏技术
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DOI
高影响因子
Journal of Materials Chemistry C
·
2020
·Vol. 8
·期 45
·16083-16091
·
IF 7.059
Wenzhen Lv,Mingchuan Xu,Lei Ge,Xun Zhu,Junxian Hong,Wei Huang,Runfeng Chen
In recent years, substantial progress has been made in the synthesis of colloidal CsPbX3 (X = Cl, Br, and I) nanocrystals (NCs). However, the anion exchange reaction always synthesizes CsPbCl3 NCs with low efficiency and poor stability. Here, first, through separating the halide precursors, mainly metal halide salts as CdCl2 in water, we propose a two-phase anion exchange method, successfully preparing CsPbCl3 NCs with a well-maintained cubic morphology and high photoluminescence quantum yields of about 95%. A controllable Cl-to-Br exchange rate is readily achieved by controlling the reaction time or the Cl− ion concentration. Benefiting from the good solubility of CdCl2 in water, Cl− ions are provided continuously, guaranteeing an adequate Cl-to-Br exchange at a high concentration of the original substrate. Rich Cl− ions, water and even the Cd2+ ions perform effective passivation of the nonradiative recombination centers likely stemming from Cl vacancies or other impurities, which has been confirmed by the transient optical spectroscopy measurements and elemental characterization. Also, the CsPbCl3 NCs reveal improved air stability and excellent photostability. We believe that the two-phase anion exchange method offers a new way to obtain high-efficiency CsPbCl3 NCs through a postsynthetic chemical transformation route, and helps to promote further corresponding applications in optoelectronic devices.
研究领域:
材料科学
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光学
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Jinbiao Shi,Jianling Zhang,Tongling Liang,Dongxing Tan,Xiuniang Tan,Qiang Wan,Xiuyan Cheng,Bingxing Zhang,Buxing Han,Lifei Liu,Fanyu Zhang,Gang Chen
Metal–organic frameworks (MOFs) have attracted increased research attention in photocatalysis due to their great potential in light harvest and conversion. However, the organic transformations as photocatalyzed by MOFs under mild conditions yet remain a challenge. Herein, three bipyridyl-containing cadmium–organic frameworks Cd(dcbpy) (dcbpy = 2,2′-bipyridine-5,5′-dicarboxylate), Cd(bdc)(bpy) (bdc = 1,4-benzenedicarboxylate; bpy = 2,2′-bipyridyl), and Cd(bdc)(2Me-bpy) (2Me-bpy = 4,4′-dimethyl-2,2′-bipyridyl) were synthesized for the first time. The bpy-containing Cd-MOFs have strong light harvest abilities and suitable photocatalysis energy potentials, making them highly active and selective for the photo-oxidation of benzylamine to N-benzylbenzaldimine under mild conditions, i.e., using atmospheric air as oxidant, at room temperature, and in the absence of any photosensitizer or cocatalyst. It provides an efficient, economical, and green way for the direct oxidation of amines to produce imines.
研究领域:
材料科学
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化学
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DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2016
·
IF 3.014
Zixuan Wang,Haitao Guo,Xusheng Xiao,Yantao Xu,Xiaoxia Cui,Min Lu,Bo Peng,Anping Yang,Zhiyong Yang,Shaoxuan Gu
0.2%–3% weight of Dy 3+ ions doped 64GeS 2 ·16Ga 2 S 3 ·20CdI 2 glasses were synthesized, and their spectroscopic properties were investigated. It was shown that the host glass could dissolve as much as 3% Dy 3+ ions without deteriorating the glass transparency. The mid-infrared (MIR) emissions of the glasses did not present remarkable concentration quenching when the Dy 3+ ions concentration was less than 0.6%. It was also shown that the MIR emission properties could be significantly improved by reducing S H/O H impurities in the glasses. The spectral analyses indicated that the 2.9 and 4.3 μm emissions of Dy 3+ ions in the glass showed relatively large stimulated emission cross sections. The glass doped with as high as 0.4% Dy 3+ ions was successfully drawn into fibers, indicating good potential of the doped glass for MIR lasers.
研究领域:
材料科学
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光学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）