INORGANIC CHEMISTRY
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2024
·
IF 4.3
Qinxuan Cao,Jianning Feng,Jinzhong Zhang,Jie Xue,Kang Wang,Ye Yang,Haipeng Lu
Direct utilization of solar energy by semiconductor nanocrystals for chemical transformations via photocatalysis has recently drawn a great deal of attention. While most photocatalytic reactions are mediated through photoredox events, the ultimate reaction scalability relies on the use of sacrificial agents. The imbalanced population of photogenerated electrons and holes often leads to catalyst degradation through photocorrosion. To circumvent this, we designed Ni2+-doped CsPbBr3 nanoplatelets (NPls) as a “redox-neutral” photocatalyst, where both oxidative and reductive cycles occur in one photocatalyst. We showed that surface Ni2+ ions can act as an “electron shuttle” to reduce protons, generating clean-energy H2 gas, while the photogenerated holes can be used to oxidize diaryl hydrazines to afford valuable azobenzenes and derivatives. Compared with previous photocatalytic demonstrations, our catalysts show excellent reaction yields with a wide substrate scope, unity atomic efficiency, and enhanced stability and recyclability.
研究领域:
材料科学
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化学工程
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光化学
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催化
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产品关联
DOI
PubMed
高影响因子
Advanced Materials Technologies
·
2022
·Vol. 8
·期 4
·2201181
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IF 8.856
Bo-Mei Liu,Xiao-Xuan Guo,Lin Huang,Rong-Fu Zhou,Rui Zou,Chong-Geng Ma,Jing Wang
Near-infrared (NIR) phosphor-converted light-emitting diodes (pc-LEDs) have sparked tremendous interest in NIR spectroscopy. However, conventional NIR pc-LEDs with a narrow full-width at half-maximum (FWHM) and single-emission block the detection scope and detection accuracy for NIR spectroscopy analysis. Herein, a multicenter strategy is developed for the preparation of blue-light-excitable Mg 2 SnO 4 :Cr 3+ ,Ni 2+ phosphors with NIR dual-emission (λ em = 830/1480 nm, total FWHM = 532 nm). Benefiting from the unique NIR dual-emission, a ratiometric measurement system with a self-calibration function is established for highly precise and nondestructive detection. For the first time, a good linear relationship with a detection limit of 0.22 wt.% is achieved for quantitative, non-invasive detection of water/ethanol mixtures in the field of NIR spectroscopy applications. Additionally, a super-broadband pc-LED with a NIR output power of 16.1mW@300 mA is fabricated, demonstrating its applications in high-penetration imaging and anticounterfeiting. These results provide an approach to achieving NIR dual-emission phosphor, thereby opening a new avenue for exploring ratiometric NIR spectroscopy techniques.
研究领域:
材料科学
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光学工程
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分析化学
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产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2021
·
IF 19.503
Lingsong Wang,Huanshun Yin,Suo Wang,Jun Wang,Shiyun Ai
Bi/BiOCl/Bi 2 O 2 CO 3 heterojunction was prepared via one-step hydrothermal process under the synergistic catalysis of Ni 2+ , where Bi(NO 3 ) 3 was employed as Bi source, DMF was used as carbon source and reductant, NiCl 2 was adopted as Cl source and co-catalyst. The content of Bi, BiOCl and Bi 2 O 2 CO 3 can be adjusted by changing the reaction time, temperature, content of DMF and NiCl 2 . The doping of Bi enhanced the photocatalytic activity of BiOCl/Bi 2 O 2 CO 3 under visible-light. Bi/BiOCl/Bi 2 O 2 CO 3 presented photo-degradation activity for environmental pollutants of rhodamine B, sunset yellow and tetracycline, which were 13.01, 9.40, 1.50 times and 168.38, 10.90, 4.75 times higher than BiOCl and Bi 2 O 2 CO 3 , respectively. The improved photocatalytic activity was ascribed to the sensitized effect of Bi and BiOCl, the surface plasmon resonance effect and the heterojunction structure, which inhibited the recombination of photogenerated electron-hole pairs. The degradation mechanism for rhodamine B was discussed, and the decreased toxicity of the degradation products was demonstrated.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2024
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IF 4.1
Yuxiang Jiao,Yifei Li,Huaijun Tang,Shanglan Xian,Yonghui He,Long Wang,Jinghao Zhang
Herein, a cationic iridium(III) complex [(ppy) 2 Ir(IPP)]PF 6 (ppy: 2-phenylpyridine; IPP: 2-(1 H -imidazo[4,5- f ][1,10]phenanthrolin-2-yl)phenol) was synthesized. Under the excitation of 328 nm (λ ex = 328 nm) UV light, this complex emitted bright yellow orange light (500 ∼ 700 nm, λ em,max = 582 nm), the Stokes shift was up to 254 nm, mainly due to excited-state intramolecular proton transfer (ESIPT) occurring in its ancillary ligand IPP. [(ppy) 2 Ir(IPP)]PF 6 was very sensitive to Ni 2+ , which was caused by the ESIPT being hindered by the coordination of [(ppy) 2 Ir(IPP)]PF 6 with Ni 2+ . Its bright yellow orange light disappeared within 1 min when Ni 2+ (1.0 equiv.) was added in its solution (in DMSO/H 2 O, v/v = 999/1), therefore, it can be used for “turn-off” chemiluminescent detection of Ni 2+ . The recognition of [(ppy) 2 Ir(IPP)]PF 6 to Ni 2+ was not interfered by many common metal ions (such as Na + , K + , Li + , Mg 2+ , Al 3+ , Ca 2+ , Fe 3+ , Ag + , Zn 2+ , Hg 2+ , Co 2+ , Pb 2+ , Mn 2+ , Ba 2+ or Cr 3+ ), however, Cu 2+ was an interfering metal ion, but its interference can be completely masked by thiourea. The detection limit was as low as 3.31 × 10 −7 mol∙L -1 (0.331 μM). The Job’s plot analysis revealed that the stoichiometry of [(ppy) 2 Ir(IPP)]PF 6 with Ni 2+ was 1:1, its detecting mechanism based on ESIPT effect was demonstrated by 1 H NMR spectra and density functional theory (DFT) calculation.
研究领域:
化学
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分析化学
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材料科学
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
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IF 7.7
Mianxing Luo,Meng Zhang,Changbiao Chi,Guo Chen
It is of great significance to study the effect of multi-enzyme aggregation behavior at the interface on the formation of multi-enzyme complexes and their co-catalytic characteristics, which is helpful for us to design and construct immobilized multi-enzyme complex systems for in vitro synthetic biology. Here, a magnetic microsphere with chelated Ni 2+ , was prepared to explore the self-assembly characteristics of PduQ-SpyTag (P-T) and Nox-SpyCatcher (N C) on its surface, based on the mixed interaction mode consisting the affinity of His-tag/Ni 2+ and covalent binding of SpyTag/SpyCatcher. After studying the effect of saturated or unsaturated adsorption of P-T on the covalent binding between P-T and N C at the interface, a possible multienzyme interaction mechanism for the affinity-assisted covalent self-assembly on the Ni 2+ chelating surface was proposed. The time evolution of NADH showed that the immobilized P-T/N-C complex formed by this method and the free P-T/N-C complex exhibited similar synergistic catalytic properties, and presented higher catalytic efficiency than the simple mixing of P-T and N C. The optimal catalytic conditions, stability and reusability of the immobilized multi-enzyme complexes prepared in this study were also discussed by comparing them with free enzymes. In this study, we demonstrate a simple and effective strategy for self-assembling SpyTag/SpyCatcher fusion proteins on the surface of magnetic beads, which is inspiring for the construction of more cascade enzyme systems at the interface. It provides a new method for facilitating the rapid construction of immobilized multi-enzyme complexes in vitro from the crude cell lysis .
研究领域:
生物化学
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合成生物学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2013
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IF 3.473
Zhimin Zhu,Fengqiang Sun,Liting Yang,Kaiyuan Gu,Weishan Li
Photo-initiated dispersion polymerization, a photochemical method for preparing poly (styrene-co-maleic anhydride) microspheres, is introduced for the first time in this paper. Ultraviolet lamp, ethanol/water mixture, 2,2-azobisisobutyronitrile, and poly (vinylpyrrolidone) were respectively used as the light source, green solvent, initiator, and stabilizer in the preparation. After careful study of the influencing factors, formations, sizes and size distributions of the microspheres were found to systematically vary with light intensity and amount of reagents used. Under the optimal conditions, microspheres with the narrowest size distribution and sizes smaller than 1 μm were obtained. Based on the functional groups contributed by the MAH , an important application of the prepared microspheres in Ni 2+ adsorption was explored. Adsorption capacities were controlled by the MAH amount added in the microsphere preparation.
研究领域:
材料科学
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环境科学
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化学工程
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产品关联
DOI
高影响因子
ANALYST
·
2012
·Vol. 137
·期 17
·4005-4009
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IF 4.23
Yu He,Xue Wang,Jingjing Zhu,Shuhua Zhong,Gongwu Song
In this work, Ni2+-modified gold nanoclusters were fabricated for fluorescence turn-on detection of histidine. The fluorescence of Au NCs was first quenched by Ni2+. Then, the addition of histidine can restore the fluorescence of Au NCs by binding with Ni2+ and removing it from the surface of the Au NCs. This architecture ensured non-toxic, cost-effective, label-free and sensitive detection of histidine. The developed Au NCs-based fluorescent sensor offered high selectivity for histidine over other amino acids. The relative standard deviation (RSD) for eleven replicate detections was 2.7%. The detection limit for histidine is 30 nM. The recovery of spiked histidine in human urine samples ranges from 95 to 104%.
研究领域:
分析化学
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纳米技术
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生物化学
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产品关联
DOI
PubMed
高影响因子
NANOTECHNOLOGY
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2021
·Vol. 33
·期 9
·095601
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IF 3.874
Lulu Yu,Min Liu,Yanling Zhang,Yun Ni,Shaobo Wu,Ruijiang Liu
A magnetically induced self-assembly DNAzyme electrochemical biosensor based on gold-modified α-Fe2O3/Fe3O4 heterogeneous nanoparticles was successfully fabricated to detect Nickel(II) (Ni2+). The phase composition and magnetic properties of α-Fe2O3/Fe3O4 heterogeneous nanoparticles controllably prepared by the citric acid (CA) sol–gel method were investigated in detail. The α-Fe2O3/Fe3O4 heterogeneous nanoparticles were modified by using trisodium citrate as reducing agent, and the magnetically induced self-assembly α-Fe2O3/Fe3O4–Au nanocomposites were obtained. The designed Ni2+-dependent DNAzyme consisted of the catalytic chain modified with the thiol group (S1-SH) and the substrate chain modified with methylene blue (S2-MB). The MGCE/α-Fe2O3/Fe3O4–Au/S1/BSA/S2 electrochemical sensing platform was constructed and differential pulse voltammetry was applied for electrochemical detection. Under the optimum experimental parameters, the detection range of the biosensor was 100 pM–10 μM (R2 = 0.9978) with the limit of detection of 55 pM. The biosensor had high selectivity, acceptable stability, and reproducibility (RSD = 4.03%).
研究领域:
生物化学
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纳米技术
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环境科学
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产品关联
DOI
PubMed
高影响因子
Materials Today Energy
·
2023
·
IF 9.3
Taotao Hu,Hongming Hou,Jin Peng,Qiaofeng Wu,Jialong He,Hua Yu,Rui Liu,Tian Hou,Xiangqing Zhou,Meng Zhang,Xiaolong Zhang,Xinchun Yang,Yuanmiao Sun,Xuanhua Li,Yang Bai
NiO x plays a vital role in fabricating efficient and stable inverted perovskite solar cells (PSCs). However, the relatively low conductivity and inefficient hole extraction of NiO x hole transport layer (HTL) due to the low Ni 3+ /Ni 2+ ratio limit its use in high-efficiency PSCs. Here, we report a facile strategy to remarkably enhance the electrical conductivity and hole extraction capability of NiO x HTL by simply introducing the small molecule 4- tert -butylpyridine ( t BP) as additive in the NiO x precursor solution. It is revealed that the t BP efficient improves the charge selectivity of the NiO x interface, inducing the preferable p-type carrier concentration on the surface. Consequently, more oxygen is involved in the process of Ni 2+ to Ni 3+ conversion, and the resulting t BP: NiO x HTL exhibits significantly enhanced hole extraction and transport property. In addition, a thin layer of LiF is applied to passivate the surface of NiO x , which enables improved hole migration ability by the dipole effect of LiF and reduced trap state density of the surface. The inverted PSCs (0.16 cm 2 ) fabricated with t BP: NiO x HTL delivers an enhanced efficiency of 20.2% relative to the control devices (17.5%). t BP: NiO x devices with a large area of 1 cm 2 are also demonstrated, which achieve a decent efficiency of 16% with excellent long-term stability.
研究领域:
材料科学
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能源技术
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光伏器件
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2020
·
IF 3.99
Weihua Meng,Hongjuan Wu,Ruifang Wu,Tian Wang,Aiqing Wang,Jing Ma,Jianzhong Xu,Hongqiang Qu
A novel magnesium hydroxide-polyphosphazene-Ni 2+ (MH-PZPN-Ni) was synthesized by the layer-by-layer assembly strategy and Ni 2+ chelation method. Post modification, the composite was incorporated into ethylene-vinyl acetate (EVA). The morphology, composition and structure of the MH-PZPN-Ni composites were comprehensively characterized by scanning electron microscopy, transmission electron microscope, Fourier transform infrared, X-ray diffraction and X-ray photoelectron spectroscopy. MH-PZPN-Ni could efficiently increase the flame retardancy and smoke suppression of EVA. The MH-PZPN-Ni (60 wt %)-incorporated EVA composite showed a limiting oxygen index value of 30.4 % and was rated as a UL 94 V-0 material. Cone calorimeter test results showed that the peak heat release rate and total heat release of EVA/MH-PZPN-Ni were decreased by 85.8 % and 56.7 %, respectively when compared to pure EVA. The morphology, structure, and chemical composition of the char residue and the pyrolysis products formed during the decomposition of the EVA composites were analyzed to investigate the flame-retardant mechanism of the modified EVA matrix. The production of ammonia (during the process of PZPN-Ni decay) and the water vapor formed due to the combustion of the H· and OH· radicals were found to dilute the concentration of the generated combustible gases. The denser char layer effectively blocked the heat and mass transfer. At the same time, the use of the Ni catalyst resulted in a significantly low production of various volatile products (such as CO and aliphatic and aromatic compounds). Moreover, PZPN-Ni enhanced the mechanical properties of EVA. The elongation at break increased by 74.9 %.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2013
·
IF 5.008
Yuting Zhang,Yongkun Yang,Wanfu Ma,Jia Guo,Yao Lin,Changchun Wang
A facile approach has been developed to synthesize Fe3O4/PMG (poly (N,N′-methylenebisacrylamide-co-glycidyl methacrylate)) core/shell microspheres using distillation–precipitation polymerization. Treating PMG shell with iminodiacetic acid (IDA) and Ni2+ yields composite microspheres of Fe3O4/PMG/IDA–Ni2+. The Ni2+ ions loaded on the surface of microspheres provide abundant docking sites for immobilization of histidine-tagged proteins. The high saturation magnetization of Fe3O4/PMG (23 emu/g), determined by vibrating sample magnetometer (VSM), allows an easy separation of the microspheres from solution under an external magnetic field. The composite microspheres were used to purify two His-tagged cellulolytic enzymes (Cel48F and Cel9G) directly from crude cell lysates with high binding affinity, capacity, and specificity. The microspheres can be recycled for many times without significant loss of binding capacity to enzymes. The immobilized enzymes on the surface of microspheres well retain their biological activities in degradation of cellulose. These materials show great potential in the biomedical and biotechnological applications that require low-cost purification of recombinant proteins and instant enzyme immobilization at an industrial scale.
研究领域:
生物技术
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生物化学
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材料科学
·
酶学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Today Chemistry
·
2024
·
IF 6.7
Yuan Tang,Pengbo Lyu,Desheng Yin,Zhaoqi Liu,Nian Pan,Kai Li,Ying Ye,Changfu Xu,Lizhong Sun
Ultra-broadband near-infrared (NIR) lighting sources covering NIR Ⅰ to III regions are pivotal components for NIR spectroscopy devices. However, achieving ultra-broadband and efficient emission covering the entire NIR Ⅰ to III regions remains a significant challenge. To address this, we selected Mg 7 Ga 2 GeO 12 as host material to realize ultra-broadband NIR emission. Density functional theory calculations on formation energies confirmed the feasibility of doping both Ni 2+ and Cr 3+ within Mg 7 Ga 2 GeO 12 . Band structure calculations reveal a significantly reduced band gap upon the doping of Ni 2+ . Following that, we synthesized Mg 7 Ga 2 GeO 12 :Ni 2+ through conventional solid-state-reaction method. This phosphor exhibits broadband NIR emission with a full-width-at-half-maximum of 377 nm in the range of NIR II ∼ III (1100–2100 nm). To further enhance the emission efficiency, we co-doped Mg 7 Ga 2 GeO 12 :Ni 2+ phosphor with Cr 3+ . This co-doping strategy not only dramatically enhances the Ni 2+ emission intensity, but also extends the lower limit of emission band to 600 nm. However, a spectral gap around 1150 nm remains between Cr 3+ and Ni 2+ emission centers. To bridge this spectral gap, we employed LiScSiO 4 :Cr 3+ phosphor alongside Mg 7 Ga 2 GeO 12 :Ni 2+ ,Cr 3+ phosphor to fabricate a phosphor converted LED (pc-LED) with ultra-broadband NIR emission covering entire NIR Ⅰ to III regions. By utilizing this pc-LED as the lighting source for NIR spectral detection, multiple organic functional group signals can be identified simultaneously in NIR II and III bands from 1000 to 2100 nm. The performance of such an NIR pc-LED not only confirms the application potential of Mg 7 Ga 2 GeO 12 :Ni 2+ ,Cr 3+ phosphor in non-destructive spectral analysis but also underscores the feasibility of combining two phosphors to achieve ultra-broadband NIR pc-LEDs, rendering them suitable to be lighting sources for portable spectrometers.
研究领域:
材料科学
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光学
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光谱学
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光子学
·
化学
✓ 已验证
DOI
高影响因子
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