CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Yanyan Zhao,Huanxian Shi,Xiaoyun Hu,Enzhou Liu,Jun Fan
Fabrication of CsPbX 3 (X = Cl, Br)/graphitic carbon nitride (CN) composite has proved to be an efficient way to improve the stability of CsPbX 3 nanocrystals (NCs) and improve their photocatalytic activities. Here, the CsPbBr 3 /CN and CsPbCl 3 /CN heterostructures were successfully prepared, based on the band structure, the CsPbBr 3 /CN is indexed as a type I heterostructure, and CsPbCl 3 /CN is indexed as a type II heterostructure. Both CsPbX 3 /CN heterostructure could facilitate the electron-hole pairs (e − -h + ) separation and exhibit the outstanding photocatalytic activity for penicillins 6-aminopenicillanic acid (6-APA) degradation under visible light, the degradation rates of 6-APA with CsPbCl 3 /CN and CsPbBr 3 /CN composite were about 78.11 and 83.31% in 120 min, respectively. The improved photocatalytic activity of the CsPbX 3 /CN heterostructures could be attributed to the favourable adsorbability, the enhanced light-harvesting ability, the efficient charge separation ability, as well as the synergistic effects of CsPbX 3 NCs and CN . This work may not only open up a new insight for design of CsPbX 3 -based heterostructure as novel photocatalyst but also provide a new possibility for photocatalytic applications of perovskites-based NCs.
研究领域:
材料科学
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环境科学
·
化学
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2018
·
IF 2.829
Yanjun Liu,Ping Na,Jitao Chen,Yulong Xie
K 2 Zn 3 [Fe(CN) 6 ] 2 @ Ni-P (KNiP) composites with high cesium selectivity were synthesized for the first time. Nickel phosphorus (NiP) was used as a solid base for the adsorption of K 2 Zn 3 [Fe(CN) 6 ] 2 (KZnHCF). The synthesized KNiP composites were characterized by SEM, TEM, XRD , VSM and BET. The characteristic results demonstrated that the composites possess a ball-shape structure, a large surface area of 305.031 m 2 /g and high saturation magnetization of 2.95 emu/g. The ICP-OES analyser was used to determine the concentration of ions in this study. KNiP showed good cesium adsorption performance over a wide pH range and high selectivity for cesium over coexistent competing ions. Analysis of dynamics showed that KNiP has good adsorption performance toward cesium, with an adsorption capacity of 54.95 mg/g. Equilibrium was achieved within only two hours and the experimental data fit the Pseudo second-order model, indicating that the adsorption process was chemisorption . The adsorption process followed the Freundlich isotherm model, indicating that it mainly occured on a heterogeneous surface.
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
Surfaces and Interfaces
·
2024
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IF 5.7
Xiaoxu Xu,Yuxin Sun,Kexin Lv,Yao Liu,Zhangpei Chen,Yifan Ouyang,Jianshe Hu,Qifan Chen
Palladium-based non-homogeneous catalysts have attracted considerable attention due to their high catalytic efficiency and adaptability. However, they still face the challenges of long reaction routes and poor cycling stability. An economical, efficient, stable and environmentally friendly catalyst PdNi@CN was prepared by loading nickel-palladium nanoparticles onto nitrogen-doped carbon functionalized carrier material. The catalyst was thoroughly characterized using XRD, XPS , SEM, TEM , VSM, and ICP . PdNi@CN could efficiently catalyze the Suzuki coupling reaction (Iodobenzene and phenylboronic acid , 97 % yield, TON (Turnover Number)=1.62 × 10 2 , TOF (Turnover Frequency)=2.43 × 10 2 h -1 ). Furthermore, PdNi@CN exhibited high activity in the reduction of 4-nitrophenol (4-NP, K app =8.01 × 10 –2 s -1 ). After five cycles of catalysis, the conversion of 4-NP still reached 95 %, demonstrating the excellent structural stability and high catalytic performance of PdNi@CN.
研究领域:
材料科学
·
催化化学
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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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2020
·
IF 3.306
Xiaoye Wen,Li Yan,Zhefeng Fan
A novel and simple probe (denoted LN-1) with AIE property based on malononitrile and 4-diethylaminobenzaldehyde was designed and synthesized. The use of two different mechanisms for the independent detection of Fe 3+ and CN − is more convenient and efficient than the continuous detection of anions and cations. The detection mechanism was verified by mass spectrometry (MS), nuclear magnetic resonance (NMR) spectrum, and particle size distribution. Under optimized experimental conditions, excellent calibration curves were obtained for the LN-1-Fe 3+ and the LN-1-CN − with detection limits of 0.17 and 0.39 μM, respectively. This method was successfully applied to detect the content of Fe 3+ and total inorganic iron in actual samples. Owing to its low cytotoxicity, good biocompatibility, and enhanced orange emission in aqueous solution, the LN-1 was successfully applied for CN − imaging in live cells. In addition, Fe 3+ and EDTA incorporation into the LN-1 changed the fluorescent intensity, which is beneficial in constructing ultrasensitive INHIBIT logic gate.
研究领域:
分析化学
·
生物医学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2024
·
IF 11.2
Guorong Zhang,Jiaxi Liu,Sheng Wei,Fen Xu,Lixian Sun,Yongpeng Xia,Hehui Wang,Jinfan Wu,Yuan Gao,Qiwei Shao,Yiting Bu,Yanxun Guan,Lumin Liao,Taigen Liang,Lina Qin
Herein, a novel TiO 2 /CN heterojunction material has been prepared by one-step bubble template-assisted calcination to enhance the hydrogen storage capability of LiAlH 4 . The TEM, XPS and UPS analysis confirm that a heterostructure is formed between TiO 2 and g-C 3 N 4 successfully. The experimental findings indicate that the TiO 2 /CN significantly enhances the dehydrogenation performance of LiAlH 4 . For instance, the LiAlH 4 -7 wt% TiO 2 /CN starts to dehydrogenize at 76 °C (94 °C less than pure LiAlH 4 ) and releases 6.5 wt% H 2 at 200 °C. Meanwhile, LiAlH 4 -7 wt% TiO 2 /CN releases 4.9 wt% H 2 at 120 °C within 50 min. The mechanism analysis illustrates that AlTi 3 N is formed in situ during ball-milling. And density functional theory (DFT) calculation results reveal that the AlTi 3 N can weaken the Al-H bonds in LiAlH 4 through interfacial charge transfer. Furthermore, the TiO 2 /CN heterostructure creates an internal electric field that generates an electron-rich layer. As a result, the negative electron layer at one end of the TiO 2 /CN heterojunction has an increased affinity for H, which enhances the dehydrogenation reaction of LiAlH 4 . Clearly, both the TiO 2 /CN heterostructure and AlTi 3 N contribute to the improvement of the dehydrogenation properties of LiAlH 4 .
研究领域:
材料科学
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能源化学
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产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2019
·
IF 14.229
Yanyan Zhao,Yongbo Wang,Xuhua Liang,Huanxian Shi,Cunjin Wang,Jun Fan,Xiaoyun Hu,Enzhou Liu
A visible-light-induced antibiotics degradation system based on a nano-Ag, CsPbBr 3 quantum dot (QDs) and bulk g-C 3 N 4 (CN) ternary assembly (Ag-CsPbBr 3 /CN) has been firstly constructed under an organic phase environment, oleylamine (OLA) and oleic acid (OA) were used as surfactants to stabilize the CsPbBr 3 , l -cysteine was used to facilitate the interaction between nano-Ag, CsPbBr 3 and CN. The new ternary assembly of Ag-CsPbBr 3 /CN composite was used to degrade 7-aminocephalosporanic acid (7-ACA) under visible light irradiation, and the 7%-Ag-CsPbBr 3 /CN composite displayed the superior photocatalytic activity, approximately 92.79% of 7-ACA has been degraded to CO 2 , H 2 O and other small molecules at 140 min, which was approximately 1.49-folds, 1.56-folds, 3.01-folds and 11.43-folds higher than 9%-CsPbBr 3 /CN, 7%-Ag/CN, pure CN and pure CsPbBr 3 , respectively. A possible mechanism for 7-ACA degradation over Ag-CsPbBr 3 /CN composite were proposed according to detailed measurements of adsorption test, Brunauer-Emmett-Teller (BET) measurement, UV–vis diffuse reflectance spectra (DRS), photoluminescence spectra (PL), transient photocurrent response and electrochemical impedance spectroscopy (EIS) measurement, and the enhanced photocatalytic activity of Ag-CsPbBr 3 /CN composite could be attributed to the excellent adsorbability, the enhanced light-harvesting and reduced charge recombination, as well as the synergistic effects of nano-Ag and CsPbBr 3 co-loaded with CN. In addition, Holes (h + ) and hydroxyl radicals ( OH) played major roles, electronic (e − ) and superoxide radical ( O 2 -) played minor roles based on the reactive-species-trapping experiments, the NBT transformation and the 7-hydroxycoumarin fluorescent experiments. Furthermore, a possible 7-ACA degradation pathway was investigated based on the Liquid Chromatography-Mass spectroscopy (LC-MS) experiment to better understand the degradation process. The present opens up a new insight for using CsPbBr 3 as photocatalyst to degrade antibiotics.
研究领域:
环境科学
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材料科学
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生物学
✓ 已验证
产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2017
·Vol. 5
·期 2
·438-445
·
IF 4.036
Qilong Gao,Jun Chen,Qiang Li,Ji Zhang,Zhao Zhai,Shantao Zhang,Ranbo Yu,Xianran Xing
Photo-Fenton catalysis with high-efficiency is required for the resolution of environmental pollution. Here, the Prussian blue analogue BiFe(CN)6·4H2O with a narrow bandgap (1.63 eV) shows excellent visible light catalysis to decompose organic dyes and tetracycline. The microrod and nanoplate morphologies were successfully synthesized by simple precipitation with different additives. The nanoplates of BiFe(CN)6·4H2O show excellent phono-Fenton catalytic activity meaning that RhB can be decomposed within 6 min in the presence of H2O2. BiFe(CN)6·4H2O exhibits a layered structure, which consists of FeC6 and BiN6 coordination polyhedra. The zero field cooling indicated that BiFe(CN)6·4H2O has an antiferromagnetic order at low temperatures. Furthermore, the stability of the BiFe(CN)6·4H2O catalyst is very good, which has been investigated by various characterizations. The mechanism of the excellent catalysis is related to the crucial role of H2O2, which inhibits the recombination of the electron–hole pair and drives the photo-Fenton reaction. Therefore, to treat the wastewater by photo-Fenton catalysis, the present component of BiFe(CN)6·4H2O is a promising catalyst candidate.
研究领域:
环境科学
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材料科学
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化学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2019
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IF 5.107
Ruixiang Yang,Shan Zhong,Lishan Zhang,Baojiang Liu
In the drive toward green and sustainable chemistry in wastewater treatment, it is necessary to explore more efficient and stable photocatalysts to achieve the degradation of antibiotic and reduction of heavy metal ions. To this end, an organic-inorganic hybrid PW 12 /CN@Bi 2 WO 6 composite photocatalyst was prepared: PW 12 /CN composite was prepared by heating H 3 PW 12 O 40 , melamine and phytic acid; PW 12 /CN@Bi 2 WO 6 was synthesized via PW 12 /CN and Bi 2 WO 6 by hydrothermal method. The photocatalytic activity of as-prepared photocatalyst was evaluated by degrading tetracycline hydrochloride (TC) and reducing hexavalent chromium (Cr(VI)) under the simulated xenon light source. The results show the PW 12 /CN@Bi 2 WO 6 composite always maintains high catalytic performance for TC and Cr 6+ and has well cycle stability. After irradiation for 90 and 100 min, the most effective 10%-PW 12 /CN@Bi 2 WO 6 achieved a removal rate of 98.7% for Cr(VI) and 97.5% for TC. Photoluminescence spectroscopy and photoelectrochemical results demonstrate that the charge separation is enhanced for the PW 12 /CN@Bi 2 WO 6 , attributed to the introduction of the organic-inorganic systems to enhance the absorbance of light energy, promote charge transfer and inhibit e − and h + pair recombination. In addition, the free radical scavenging test and electron spin resonance analysis (ESR) test indicate that the main species of action are h + and O 2 − in the photocatalytic oxidation reaction. Further, the mechanism of photocatalysis was proposed by Mott-Schottky. The strategy improving catalytic performance through organic-inorganic hybrid systems provides a new route for the development of photocatalysts.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Chuanyi Guo,Chaofa Chen,Jiaying Lu,Du Fu,Cheng-Zong Yuan,Xi-Lin Wu,Kwun Nam Hui,Jianrong Chen
Stable and recyclable catalysts are crucial to the peroxymonosulfate (PMS) based advanced oxidation process (AOPs) for wastewater treatment . Herein, nitrogen-rich carbon wrapped Fe 3 C (Fe 3 C@CN) on carbon felt (CF) substrate was synthesized by using Prussian blue (PB) loaded CF as the precursors. The obtained Fe 3 C@CN/CF catalyst was applied for degradation of bisphenol A (BPA) via the heterogeneous catalytic activation of PMS. Results showed that ~91.7%, 95.2%, 98.1% and 99.1% of BPA (20 mg/L) were eliminated in the Fe 3 C@CN/CF + PMS system within 4, 10, 20 and 30 min, respectively. The fast degradation kinetics is attributed to the production of abundant reactive species ( OH, SO 4 − and 1 O 2 ) in the Fe 3 C@CN/CF + PMS system, as demonstrated by the electron paramagnetic resonance spectroscopy and quench experiments. The Fe 3 C@CN/CF catalyst was stable and can be easily recycled by using an external magnet. The results indicated that the nanoconfined Fe 3 C endowed Fe 3 C@CN/CF with high stability and magnetic property and enabled the efficient electron transfer for PMS activation. This study provides a cost-effective approach for the fabrication of stable and recyclable Fe 3 C@CN/CF catalyst, and shed a new light on the rational design of multifunctional catalyst for advanced water remediation.
研究领域:
环境科学
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催化材料
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废水处理
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2020
·Vol. 31
·期 24
·22028-22038
·
IF 2.22
Peng Qirui,Yang Lu,Zhao Qiuying,Ma Yizhou,Ji Hongli,Qiu Jinhao
The development of piezoelectric polymers with superior electromechanical performance is a demand in the areas of flexible sensors, actuators and tissue engineering, among others. In this work, we reported a novel sandwich-structured piezoelectric composites comprising of poly(vinylidene fluoride-hexafluoropropylene) [P(VDF-HFP)] and Prussian blue analogs Co 3 [Co(CN) 6 ] 2 with excellent electromechanical activities. The large specific surface area, unique three-dimensional porous nanostructure and redox behavior of Co 3 [Co(CN) 6 ] 2 appeared to significantly promote the interfacial coupling effect within P(VDF-HFP), resulting in enhanced electromechanical response. Moreover, the sandwich structure topological design would enlarge the interfacial coupling effect, strengthen the breakdown strength and consequently raise the electromechanical performance. For instance, a maximum piezoelectric coefficient d 33 of ~ 41 pC/N can be achieved in the sandwiched composites at a loading of 0.8 wt%, which is 1.78 times that of pure P(VDF-HFP). Furthermore, the sandwiched composites possess superior electromechanical coupling factor k 33 up to 0.215, while that of pure P(VDF-HFP) is only 0.134.
研究领域:
材料科学
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柔性电子
·
传感器技术
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产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2020
·
IF 9.038
Y.L. Zhao,G.G. Li,H.M. Hou,J.C. Shi,S.N. Luo
We investigate atomic and molecular emission of laser-ablated nitromethane in an Ar or N 2 buffer gas, with fs laser-induced breakdown spectroscopy. The electronic bands of CN, C 2 , and NH molecules and the atomic transition lines of C I, N I, and H α are identified. The time series of the emissions are obtained, and the formation mechanisms of CN and C 2 are deduced. The CN violet system, the B 2 Σ + -X 2 Σ + (0-0) band, is chosen to extract plasma temperature from the experimental spectra.
研究领域:
物理化学
·
光谱学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
TALANTA
·
2025
·
IF 6.1
Xinyu Zhang,Xuan Zhou,Quan Wan,Taolei Sun,Guanbin Gao
Prussian blue analogue nanozymes (PBANZs) have been widely employed in the colorimetric detection of various organic small molecules due to their peroxidase-like activity. However, the practical applications of PBANZ are limited by its narrow operating pH range, insufficient catalytic activity, and poor stability. In this study, we synthesized a novel Cu 2 Fe(CN) 6 @PVP PBA nanozyme (Cu-PBANZ) using polyvinylpyrrolidone (PVP) as a capping ligand. This novel Cu-PBANZ not only exhibited enhanced peroxidase-like activity and improved stability under near-neutral conditions but also demonstrated higher sensitivity and a broader linear range in the detection of hydrogen peroxide (20–4000 μM, LOD 5 μM) and ascorbic acid (10–2000 μM, LOD 3.9 μM). Besides, a smartphone-based platform was developed for detecting AA content in fruits, achieving a detection limit of 7.8 μM. Both UV–Vis spectrophotometry and smartphone-based colorimetry were validated with recovery rates of 95.1 %–106.7 % and 94.8 %–108.9 %, respectively. This study proposed a promising biosensor incorporating Cu-PBANZ for rapid colorimetric detection of AA in fruits using a smartphone.
研究领域:
生物化学
·
食品科学
·
分析化学
✓ 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）