CATALYSIS TODAY
·
2023
·
IF 5.3
Yue Hua,Jingsen Zhang,Tengda Zhang,Aimin Zhu,Guangqing Xia,Xiuling Zhang,Lanbo Di
Catalytic removal of 4-nitrophenol (4-NP) in wastewater remains a significant challenge due to the poor activity and stability of the catalysts. Herein, low-cost graphite oxide (GO) supported Pd and Ni NPs (PdNi/GO) with enhanced catalytic activity and stability for 4-NP reduction were synthesized by a plasma method in the aqueous solution of Pd(NO 3 ) 2 , Ni(NO 3 ) 2 , and GO. The normalized rate constant k nor over the PdNi/GO with Pd/Ni= 1.8:0.2 for 4-NP reduction was as high as 5480 min −1 ·g −1 ·L, which was comparable with that of Pd/GO, and it was about 50.7 times higher than that of Pd/rGO-H prepared by traditional thermal reduction method. Importantly, after six reaction cycles, it only decreased to 74.8% of the initial value, which was much higher than that of the Pd/GO catalyst (59.8%). The characterization results indicated that plasma synthesized Pd/GO catalyst can keep the oxygen-containing groups (OCGs) on the GO surface , generate abundant defects, and facilitate the adsorption of the 4-NP. Interestingly, the addition of Ni could keep these merits, and the formed PdNi alloyed structure may facilitate the electron transfer between PdNi NPs and GO, contribute to the strong adsorption of 4-NP and the rapid generation of active hydrogen. Consequently, the PdNi/GO catalyst exhibited outstanding catalytic activity and stability for 4-NP reduction. This work provided a fast, facile, environmentally friendly, and easy to scale up plasma method for synthesizing high performance Pd-based catalysts.
研究领域:
环境催化
·
纳米材料
·
物理化学
·
水处理
·
能源与环境科学
✓ 已验证
DOI
高影响因子
SCIENTIA HORTICULTURAE
·
2024
·
IF 3.9
Qiong Wu,Xiaoya Tao,Chunxiao Cui,Yanan He,Dongdong Zhang,Yurong Zhang,Li Li
Phytohormones are vital for tomato ripening, and abscisic acid (ABA) is speculated to induce ethylene biosynthesis at the initiate of tomato fruit ripening; however, its interaction sites remain unclear. In the present study, Constans-like 4 (SlCOL4), a CO/COL transcription factor, was cloned from tomato fruit. Amino acid sequence and subcellular location analysis proved that SlCOL4 was a typical transcription factor of the COL family. Gene expression analysis showed SlCOL4 expressed in different tissues of tomato plants and its transcription abundance declined at the onset of fruit ripening, coincidentally it was found to be down-regulated in ABA-treated tomato fruit and responded to exogenous ABA within 6 h after treatment. Meanwhile, yeast one-hybrid and dual-luciferase analysis showed that the ABA response factor SlAREB1 inhibited the transcription of SlCOL4 , indicating it was directly regulated by ABA at the mature green stage of tomato fruit . In addition, the pericarp color turned red faster than that of control fruit, and the key ethylene biosynthesis genes, ACS2, ACS4, and ACO1 , were up-regulated in SlCOL4 silenced tomato fruit, suggesting that SlCOL4 may be a negative regulator of ripening. Furthermore, several genes associated with the ethylene signaling pathway were identified downstream of SlCOL4 by chromatin immunoprecipitation sequencing (ChIP-Seq) analysis. Overall, the transcription factor SlCOL4 may interact with ABA and ethylene signals and negatively regulate tomato fruit ripening. The results in this study provide new insights for elucidating the molecular mechanism of ABA-ethylene interaction in regulating tomato fruit ripening, and provide references for further research on the role of COLs transcription factors in tomato fruit ripening as well.
研究领域:
植物生理学
·
分子生物学
·
园艺学
✓ 已验证
DOI
高影响因子
BULLETIN OF THE KOREAN CHEMICAL SOCIETY
·
2018
·Vol. 39
·期 5
·611-617
·
IF 0.522
Qi Sun,Jianmei Li,Tao Le,Lei Zhang
Herein, a facile and enzyme-free CP sensor was fabricated by in situ electrochemical reduction strategy on the surface of glassy carbon electrode (GCE). Reduced graphene oxide (RGO) was chose as supporting materials for the distribution of platinum nanoparticles (Pt NPs) to obtain improved catalytic properties. The applicability and suitability of the obtained RGO-Pt/GCE for 4-CP detection were also evaluated. The results indicated that the RGO-Pt NPs modified electrode displayed much better catalysis and higher sensitivity for 4-CP oxidation. Under optimum conditions, the oxidation peak current was proportional to 4-CP concentration in the range from 0.1 to 500 μM with a detection limit of 51 nM. Meanwhile, it is demonstrated that the prepared sensor is also characterized by excellent feasibility, satisfactory reproducibility, good stability and high specificity. The results suggested that RGO-Pt/GCE could be a facile, cost-effective, and rapid tool for the prospect on-line evaluation of 4-CP in drinking water samples.
研究领域:
环境科学
·
分析化学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 28
·16955-16961
·
IF 3.361
Zeng-Feng Wei,Li-Jie Ni,Heng Quan,Jiang Duan
4-Substituted catechols with different CC bonds as urushiol analogues were synthesized through the a three-step route including reductive amination reaction of 3,4-dihydroxybenzaldehyde with N-Boc-piperazine, Boc deprotection, and amidation with various fatty acids. Electrochemical polymerization of these analogues on a copper surface afforded robust coatings with desirable adhesive force, hydrophobicity and thermal stability. Cyclic voltammetry and infrared spectroscopic characterizations revealed that the coating formation of urushiol analogues resulted from the electrooxidation-induced radical coupling of phenoxyl radicals with a phenyl ring and the side chain CC bond. The coating of the urushiol analogue bearing only one side chain CC bond exhibited the best performance in copper corrosion inhibition, with an inhibition efficiency of 99.99% and long-term effect (99.9% after 4 weeks of immersion in 3.5 wt% NaCl). The desired performance of these urushiol analogues suggests that they could be of practical applications as an alternative to the resource-limited natural urushiol.
研究领域:
有机化学
·
材料科学
·
腐蚀与防护
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2020
·Vol. 167
·期 13
·136513
·
IF 3.721
Nannan Dou,Jianying Qu
Herein, a hybrid nanomaterial of copper-nickel bimetal and reduced graphene (rGO) was simply and quickly synthesized by hydrothermal method, which was characterized by transmission electron microscope, field emission scanning electron microscopy, fourier transform infrared spectroscopy, electrochemical impedance and X-ray diffractometry. A new type of electrochemical sensor was constructed by fixing this hybrid on the glassy carbon electrode (GCE). Square wave voltammetry and cyclic voltammetry indicate that this Cu-Ni/rGO/GCE sensor has highly sensitive electrocatalytic activities to 4-aminophenol (4-AP) and acetaminophen (AC). The linear detection ranges were 0.10∼50.00 μM for AC and 0.10∼30.00 μM for 4-AP, with the detection limits of 2.13 nM for AC and 2.19 nM for 4-AP, respectively. The Cu-Ni/rGO/GCE was successfully used for the determination of 4-AP and AC simultaneously of paracetamol tablets, and satisfactory results were obtained.
研究领域:
材料科学
·
分析化学
·
生物医学
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2022
·
IF 9.221
Xin Xin,Huimin Liu,Nianbing Zhong,Mingfu Zhao,Dengjie Zhong,Haixing Chang,Bin Tang,Yuanyuan He,Cunling Peng,Xuefeng He
To realize the selective detection of 4-chlorophenol (4-CP) in water, a highly sensitive plastic optical fiber (POF) evanescent wave sensor was prepared using a D -shaped POF coated selective adsorption film of 4-CP. The film was composed of molecularly imprinted polymer (MIP) particles and PEBA2533 matrix. The MIP particles were employed to realize the selective adsorption and enrichment of 4-CP molecules, which lead to the changes in the refractive index of the MIP-PEBA2533 coating. These, in turn, resulted in changes in the light transmission in the D -shaped region and caused the attenuation of the evanescent field intensity on the surface of the sensing region. To illustrate the measurement principle, a theoretical model of the sensor was established. Furthermore, the performance parameters of the sensors, such as sensitivity, repeatability, selectivity and low limit of detection (LOD), were experimentally studied. The results highlighted that the proposed sensor exhibited a good sensitivity of -0.56 × 10 -6 (μg/L) -1 and LOD of 100 μg/L for the detection of 4-CP in water. Moreover, this optic-fiber sensor has high specific recognition ability for 4-CP. The results of this study could inform the development of methods for on-line and accurate detection of 4-CP.
研究领域:
环境科学
·
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2015
·Vol. 39
·期 6
·4519-4525
·
IF 3.086
Yansheng Liu,Xinlin Li,Xuanduong Le,Wei Zhang,Hao Gu,Ruiwen Xue,Jiantai Ma
MCM-48 mesoporous microspheres (M48N) with a pore size of 3.77 nm, an ultra-high surface area of 1250.77 m2 g−1 and a super-large pore volume of 1.52 cm3 g−1 were synthesized. The M48N microspheres were then modified with Pd, Pt and Ru nanoparticles using an incipient wetness impregnation technique. The modified M48N microspheres were investigated to determine their catalytic effect in the aqueous phase hydro-dechlorination (HDC) of 4-chlorophenol. The Pd–M48N, Pt–M48N and Ru–M48N catalysts were characterized by transmission electron microscopy, X-ray diffraction, nitrogen adsorption–desorption and X-ray photoelectron spectroscopy. The HDC experiments were performed using the fairly mild conditions of room temperature and an atmospheric pressure of H2. Pd–M48N showed a higher catalytic performance than Pt–M48N and Ru–M48N and various other Pd-based catalysts. The high catalytic performance of Pd–M48N resulted from the ultra-high surface area, super-large pore volume and unique pore structure of the M48N, which improved the mass transfer and increased the rate of adsorption–desorption of the compounds. This method has potential applications in the treatment of industrial wastewaters contaminated with chlorinated organic compounds.
研究领域:
环境科学
·
催化化学
✓ 已验证
DOI
高影响因子
MICROCHIMICA ACTA
·
2020
·Vol. 187
·期 3
·1-9
·
IF 6.232
Wang Hai-Bo,Bai Hong-Yu,Wang Ya-Shu,Gan Tian,Liu Yan-Ming
A highly stable copper nanoclusters (CuNC) carrying 4-chlorothiophenol as a protective ligand is described. They display self-assembly-induced emission with excitation/emission maxima at 330/605 nm even in neutral or alkaline aqueous environment. The fluorescence of these CuNC is quenched by Hg(II). Quenching is mainly ascribed to the formation of a complex formed via Hg-S bonding between the Hg(II) ions and the ligand. This destroys the ordered architectures of the assembled CuNC. The assay enables Hg(II) to be determined with good sensitivity and a linear response ranging from 1 to 500 nM Hg(II) with a 0.3 nM limit of detection. In addition, the method was implemented in a test strip (which undergoes a color change from red to blue) that can be used for visual determination of Hg(II) in complex environmental water samples.
Novel and highly selective fluorimetric and colorimetric methods have been designed for mercury(II) ions determination based on stable self-assembly-induced emission of copper nanoclusters.
研究领域:
分析化学
·
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
Journal of Cleaner Production
·
2022
·
IF 11.072
Tingjin Jiang,Yang Wang,Zichang Guo,Haopeng Luo,Chuanxiang Zhan,Yaojin Wang,Zhe Wang,Fang Jiang,Huan Chen
Piezoelectric catalysis based on the polarization of piezoelectric materials is a promising technology for environmental pollutant treatment. Developing effective piezoelectric catalysts and clarifying the reaction mechanism are crucial to the application of piezoelectric catalysis. Herein, a unique strategy of photochemical self-etching of Bi 25 FeO 40 was used to prepare a piezoelectric catalyst of Bi 25 FeO 40 /Bi 2 O 2 CO 3 . During the photochemical process, methanol was oxidized to formaldehyde, and then Bi species on the surface of Bi 25 FeO 40 reacted with formaldehyde to form Bi 2 O 2 CO 3 . As a lead-free piezoelectric catalyst, the Bi 25 FeO 40 /Bi 2 O 2 CO 3 composite possessed excellent activity for the degradation of 4-chlorophenol under ultrasonic vibration, and the degradation efficiency was more than 90% within 120 min. Introducing Bi 2 O 2 CO 3 onto the surface of Bi 25 FeO 40 can significantly promote the piezoelectric catalytic activity of Bi 25 FeO 40 via the effect of built-in electric fields. It was also found that ·OH and ·O 2 − are the main active species that are responsible for the degradation of 4-CP. The results that are presented here can extend the piezoelectric application of bismuth ferrate , and the strategy for building up the heterojunction is helpful for the preparation of other Bi-containing piezoelectric catalysts.
研究领域:
环境科学
·
催化材料科学
✓ 已验证
DOI
高影响因子
ZEITSCHRIFT FUR KRISTALLOGRAPHIE-NEW CRYSTAL STRUCTURES
·
2023
·Vol. 238
·期 6
·1069-1070
·
IF 0.3
Yan-Qing Wang,Wen-Qing Yan,Li-Xue Nie,Ping-Ping Luan,Chao-Qun Li
C 20 H 22 Cu 3 N 8 O 10 , monoclinic, C 2/ c (no. 15), a = 12.0766(11) Å, b = 16.2778(14) Å, c = 14.7605(13) Å, β = 97.8580(10) ∘ , V = 2874.4(4) Å 3 , Z = 4, R
gt ( F ) = 0.0420, wR
ref ( F
2 ) = 0.0988, T = 298.15 K.
研究领域:
无机化学
·
晶体学
✓ 已验证
DOI
高影响因子
CRYSTENGCOMM
·
2022
·Vol. 24
·期 30
·5519-5526
·
IF 3.756
Lu Zhang,Wen-Shuai Dong,Zu-Jia Lu,Ting-Wei Wang,Chao Zhang,Zun-Ning Zhou,Jian-Guo Zhang
Energetic metal organic frameworks (EMOFs) are increasingly developed and have proven to be candidates for novel high energy density materials (HEDM). Here, two energetic metal complexes based on 3,5-diaminopyrazolone-4-oxime (DAPO) ligands were synthesized by simple steps and fully characterized by NMR and IR spectroscopy, X-ray single-crystal diffraction, and DSC-TG. The detonation performance was calculated using the Kamlet–Jacobs formula. The crystal densities of these complexes (C6H14N12O10Co (2) and C6H14N12O10Cd (3) are as high as 1.945 g cm−3 at 163 K and 2.072 g cm−3 at 298 K, respectively. Thermal analysis by the DSC-TG test shows that they all have good thermal stability with the highest decomposition temperatures of 287 °C and 344 °C, respectively. These two as-synthesized complexes exhibit excellent detonation performance; 2 (D = 8682 m s−1, P = 34.98 GPa) and 3 (D = 8383 m s−1, P = 33.78 GPa) have good detonation velocity and detonation pressure that are superior to those of TNT, which is widely used today. Thus, they show great promise for potential applications as thermally stable energetic materials.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2015
·
IF 3.368
Pancras Ndokoye,Qidong Zhao,Xinyong Li,Tingting Li,Moses O. Tade,Shaobin Wang
In this study, we demonstrate for the first time that highly branched gold nanostars (AuNSs) and silica-coated AuNSs (AuNSs@mSiO 2 ) could potentially serve as efficient hydrogenation catalysts. The catalytic activity could be promoted by raising the number of tipped-branches of AuNSs, which reveals that the tips play an important role as active sites. The fabricated sharply-pointed AuNSs benefit the electron transfer from BH 4 anions to 4-nitrophenol. Coating AuNSs with mesoporous silica (AuNSs@mSiO 2 ) further enhanced the reduction rate and recyclability, and also contributed to reducing the induction period. The AuNSs@mSiO 2 (50–100 nm in diameter) are large enough to be catalytically inactive, but they consist of sharply-pointed tips with the radius of 2.6–3.6 nm, which are rich in coordinately unsaturated sites similar to those of nanoparticles and clusters. Such features in structure and activity would also extend their application range in heterogeneous catalysis .
研究领域:
纳米材料科学
·
催化化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）