ENERGY & FUELS
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2021
·
IF 3.605
Jin-Long Yi,Xiang-Hui Yu,Ru-Liang Zhang,Lei Liu
Reasonable porous structure and proper heteroatom doping have great influences on electrode materials for supercapacitors. Herein, O, N, and P codoped hierarchical porous carbon (ONPC) was synthesized through a one-pot carbonization–activation strategy by using chitosan as the carbon precursor, phosphoric acid as the activator, and melamine foam as the skeleton. The use of melamine foam facilitated the formation of an interconnected carbon framework and introduced more nitrogen functional groups. Owing to the hierarchical pore structure, large surface area (1588 m2 g–1), and significant heteroatom contents of O (8.61%), N (7.95%), and P (1.34%) in the carbon matrix, the 700 °C carbonized sample ONPC-700 had a specific capacitance of 230 F g–1 at 0.2 A g–1. A high energy density of 7.5 Wh kg–1 at 100 W kg–1 was achieved for the supercapacitor fabricated with two identical ONPC-700 electrodes. Furthermore, the capacitance retention of the device was evaluated to be as high as 86.53% after 8000 cycles.
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Environmental Science-Nano
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2021
·Vol. 8
·期 12
·3629-3642
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IF 8.131
Jiaojiao Wang,Xiaoqing Jia,Denghui Shang,Liangbo Xie,Yi Li,He Zhang,Sihui Zhan,Wenping Hu
The long-term overuse of ciprofloxacin has resulted in its ubiquitous release into aquatic environments, seriously threatening public and ecological security. Herein, a photo-assisted-electro-Fenton-like (PAEF-like) system using p–n type Cu2O/Bi2MoO6 (CBM) as photoelectric catalyst was designed for efficient ciprofloxacin removal. The realization of photo-assisted function benefited from the perfectly constructed p–n heterojunction, which effectively regulated the carrier migration behaviors and drove the directional delivery of photoinduced electrons with flexible reactivity. Furthermore, photoinduced electrons directly or indirectly promoted the activation of H2O2 to enhance the ability of the PAEF-like synergy system to form ˙OH, improving the photoelectric catalytic activity. As dominant active species, ˙OH cooperated with h+ and ˙O2−, leading to the efficient elimination of ciprofloxacin. Finally, the degradation rate within 120 min reached almost 100%, and the corresponding kinetic constant was 208 and 1.5 times that of the photocatalytic and EF-like system, separately. Importantly, CBM-25% still maintained superior removal effect after four consecutive runs, revealing the high stability and practical feasibility of the PAEF-like system.
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MICROCHIMICA ACTA
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2021
·Vol. 189
·期 1
·1-13
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IF 5.833
Xu Yeqing,Huang Ting,Meng Minjia,Yan Yongsheng
A highly effective fluorescent molecularly imprinted sensor (F-PDA-MIS) based on fluorescent polydopamine (F-PDA) was successfully synthesized for selective and ultrafast detection of p-nitrophenol (P-NP) in drinking water. F-PDA with abundant surface functional groups has been artfully modified to firstly serve as both fluorescent monomer and functional monomer in the synthesis of a uniform luminous F-PDA-MIS, which can greatly improve the detection efficiency. As expected, F-PDA-MIS had an obvious emission wavelength of 535 nm with the optimal excitation wavelength at 400 nm. Specially, F-PDA-MIS could detect P-NP in the range 100 to 1100 nM with much lower detection limit of 24.2 nM within 120 s compared with other conventional imprinted fluorescent sensors based on pure quantum dots (QDs) or dyes. This excellent test phenomenon is mainly ascribed to the rapid electron transfer between F-PDA and P-NP. Satisfactory recovery of 98.0–104% for mineral water and 98.6–106% for boiling water were obtained with relative standard deviations (RSDs) of 2.7–3.4% and 2.6–3.5% respectively. The detection reliability of F-PDA-MIS was verified by the comparison with high-performance liquid chromatography (HPLC–UV). Consequently, F-PDA as a fluorescence functional monomer has been shown to be a possible strategy to effectively improve the detection limit and shorten response time of the target determination in water.. Graphical abstract
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PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2021
·
IF 5.316
Liang Li,Yongwei Lu,Xiaowei Liu,Xinran Wang,Siyue Zhou
Petal-like ultra-evenly Rh-doped Co 2 Fe-P composite was fabricated by a solvothermal and in-situ phosphorization strategy. Through doping a small amount of Rh within the Co 2 Fe-P structure, the catalytic activities of the composite for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) could be highly improved, and an excellent electrochemical bifunctional catalyst could be achieved. Under acidic reaction conditions, it only required an overpotential of 76 mV for HER to achieve a current density of 10 mA·cm −2 . Meanwhile, excellent electrochemical performance could also be obtained in alkaline electrolytes . The overpotential was 48 mV for HER and 303 mV for OER at 10 mA·cm −2 in 1 M KOH, respectively. Impressively, as a bifunctional electrode, the Rh doped Co 2 Fe-P composite can release a current density of 10 mA·cm −2 at a low cell voltage of 1.54 V in 1 M KOH for overall water splitting, which could be compared with that using commercial noble metal catalysts.
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APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Wenhua Shi,Shan Lu,Ming Chao,Xiangjun Zheng,Hongyu Gong,Yuhang Qian,Fei Gao,Xingmei Guo,Yuanjun Liu,Junhao Zhang,Ruizhi Yang
Preparing metal-free and non-N-doped carbon-based electrocatalysts via pyrolysis encounters a significant challenge of low controllability for microstructure modulation and limited electrocatalytic activity. Herein, a bottom-up puzzle strategy is proposed to fabricate a series of phosphorus and boron co-doped carbon (P-BC) nanosheets. These P-BC nanosheets manifest diverse morphologies and distinct heteroatom doping levels, achieved through the innovative utilization of four similar P onium salts featuring varying benzene ring arrangements, coupled with a fixed B onium salt. Among them, the flat 4P-BC nanosheets with abundant P/B heteroatoms exhibit the optimal oxygen reduction reaction (ORR) performance (E 1/2 = 0.79 V, j L = 5.77 mA cm −2 ), and the assembled zinc-air battery displays a large power density (163 mW cm −2 ) and excellent long-term durability (450 cycles), which is attributed to the high specific surface area, enhanced defects or disorder, and ample P/B-doping induced active sites for electrochemical reaction. The assembly mechanism of functional units in solution and their intricate evolution at high temperature are elucidated for various P-BC nanosheets. This work elaborates the influence of precursors functional units on the resulting microstructure attributes and active sites properties, providing a novel avenue for the rational design and optimization of metal-free and heteroatom-doped carbon electrocatalysts.
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ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Tan Dang,Lei Wang,Donghai Wei,Guiqing Zhang,Qinggang Li,Xiaojia Zhang,Zuoying Cao,Guanhua Zhang,Huigao Duan
Low-cost and resourceful transition metal phosphides (TMPs), as a new kind of pseudocapacitive materials, have received considerable interest for electrochemical energy storage/conversion. Combination of TMPs and carbon nanostructures is supposed to greatly improve the charge storage capability due to the synergistic effect. In this work, nickel cobalt phosphides nanosheets supported by P doped C spheres (P-CSs@Ni-Co-P NSs) composites with different Ni/Co molar ratios (1:0, 1:1, 1:2, 1:4 and 0:1) were prepared by in-situ bifunctional phosphorization of the as-synthesized CSs@Ni-Co-OH NSs precursor. The optimized 3D networked mesoporous P-CSs@Ni 1 -Co 2 -P NSs electrode exhibits a remarkable specific capacitance of 1040.3 F g −1 at 1 A g −1 and excellent rate capability with a capacitance retention of 49.2% even at 30 A g −1 , which are much higher than those of A-CSs@Ni 1 -Co 2 -O NSs (870.5 F g −1 at 1 A g −1 , 37.4% at 30 A g −1 ) and Ni 1 -Co 2 -P NSs (500.5 F g −1 at 1 A g −1 , 40.0% at 30 A g −1 ). The improved supercapacitive performances are attributed to the 3D mesoporous nanosheets network and bifunctional phosphorization treatment which lead to enhancement of conductivity. Meanwhile, Ni-Co bimetallic phosphide with abundant oxidation states facilitates redox charge transfer efficiently. Furthermore, P-CSs@Ni 1 -Co 2 -P NSs assembled asymmetric supercapacitors (ASC) achieve outstanding cycling stability with no decay of capacitance after 20000 cycles. Additionally, the charge storage kinetic of the device is further investigated, indicating that fast surface-control capacitive behavior is dominant at high current densities.
研究领域:
材料科学
·
电化学
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Ding Ling Gao,Yan Xue Xue,Fei Fei Dai,Yu Xiang Liu,Na Qin,Ya Yuan Zhang,Jian Hua Chen,Qian Yang
In this study, polyaniline-p-phenylenediamine (PAPD) was employed as an amino monomer to fabricate a polyaniline-p-phenylenediamine composite membrane (PAPD/PES) with a nanoparticle-like surface morphology. Additionally, we used interfacial polymerization of Tris(hydroxymethyl)aminomethane (THAM) to hydroxylate the PAPD/PES composite membrane, resulting in the formation of a TPAPD/PES composite membrane. THAM is an economical and environmentally friendly monomer, rarely used for surface modification of composite membranes through interfacial polymerization. Following the introduction of THAM, a significant abundance of hydroxyl groups appeared on the membrane’s surface, enhancing its hydrophilicity and electronegativity. This, in turn, improved both flux and rejection capabilities. Simultaneously, the introduction of THAM led to the formation of a hydration layer growing on the membrane’s surface, further enhancing its antifouling performance. The optimal polymerization concentration (0.5 mol/L) of THAM was used to synthesize the TPAPD/PES composite membrane, resulting in a flux of 84.18 L m −2 h −1 bar −1 , which was 1.46 times higher than that of the PAPD/PES composite membrane before polymerization. Additionally, the phosphate rejection rate was determined to be 92.14 % (with an initial phosphate concentration of 10 mg P/L). Long-time running and operating pressure tests results confirmed the remarkable stability of the TPAPD/PES composite membrane. Furthermore, the phosphate separation property of the TPAPD/PES composite membrane was evaluated using real wastewater samples (with an initial phosphate concentration of 1.03 mg P/L) as the research object. After separation, the permeate displayed a phosphate concentration of 0.28 mg P/L, meeting the first-class A standard for urban sewage treatment in China (0.5 mg P/L). This indicates that the prepared TPAPD/PES composite membrane has significant potential for practical application.
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Revista Brasileira de Farmacognosia-Brazilian Journal of Pharmacognosy
·
2023
·
IF 1.6
Huang Mingjun,Wu Fanchang,Zuo Xue,Liu Jinman,Yu Wenqian,Xie Ruiye,Liu Guoqing,Tan Qiwen,Wang Qi,Liang Yong
Plant-based medicines derived from traditional Chinese medicine have garnered widespread attention for their potential in the prevention and treatment of various diseases, offering superior oral bioavailability compared to the use of single drug formulations. Nonetheless, the precise biological mechanisms and interactions between compounds and enzymes remain inadequately understood. This study delves into the inhibitory interactions of quercetin with cytochrome P450 and P-glycoprotein, leading to a synergistic enhancement of osthole bioavailability in rat plasma. The results indicate that quercetin demonstrates concentration-dependent and uncompetitive inhibition of liver microsomal cytochrome P450 proteins 3A, with an observed IC 50 value of 34.17 μM. Additionally, quercetin notably suppresses the expression of P-glycoprotein in the small intestines of rats, resulting in a significant 52.9% reduction ( p < 0.001) and a corresponding downregulation of its associated mRNA Mdr1b level. The administration of quercetin alongside osthole in rats leads to a marked increase of over 80% ( p < 0.001) in osthole blood concentration, as determined by pharmacokinetic analysis, surpassing the effects of pure osthole usage. This multifunctional attribute of quercetin, along with the observed synergistic changes in pharmacokinetics, holds promise for shedding light on the interplay of drug–drug/enzyme interactions in the context of medicinal plants. Graphical abstract
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ANALYTICA CHIMICA ACTA
·
2023
·
IF 6.2
Minjie Peng,Yufeng Sun,Wen Zang,Changyong Gao,Lijing Miao,Aiguo Wu,Yujie Zhang
Background As a common industrial raw material and chemical intermediate, p-Aminophenol (pAP) is recognized as a serious pollutant that poses harm to both the environment and human health. The traditional detection methods for pAP have the advantages of good selectivity and high sensitivity, but their complex operation and time-consuming defects limit their application in on-site detection. Therefore, it is necessary to develop a simple, low-cost, rapid and high-sensitivity method for the detection of pAP. Results Noble metal nanoparticles have been widely used in colorimetric sensing because of their simplicity and practicality. Herein, we presented a simple, excellent sensitive and selective colorimetric method for high-performance detection of pAP based on Cu–Au nanoparticles (Cu–Au NPs) and KIO 3 . In the presence of pAP, KIO 3 was reduced to I 2 , which subsequently chemically adsorbed onto Cu–Au NPs surface and induced the dispersion and reorganization of Cu–Au NPs, along with prominent color change of the dispersion from gray-blue to pink and the transformation of Cu–Au NPs from chain-like aggregates to individual dispersed, irregular, subspherical nanoparticles. The mechanism was verified by TEM , DLS , Zeta potential , UV–vis and XPS . Meanwhile, Cu–Au NPs probe can rapidly detect pAP within 25 min, the limit of detection of pAP probe is 5 μM by the naked eyes and 0.03 μM by UV–vis absorption spectrum . Significance and novelty This is the first colorimetric assay for pAP based on Cu–Au NPs probe. The satisfactory linearity (R 2 = 0.9984) indicates that the colorimetric probe based on Cu–Au NPs and KIO 3 can be utilized for quantitative detection of pAP. The detection results of pAP in real environmental water samples, urine samples and paracetamol tables demonstrate the practicability of pAP colorimetric probe.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Shuaishuai Liu,Junhao Jiang,Chengzhao Jin,Ruixve Sun,Zengming Man,Pengxin Li,Kun Chang
Constructing Z-scheme heterojunctions by establishing a unique charge transfer pathway at the interface has garnered growing attention in photocatalytic technology. In this study, a p-n heterojunction of Z-scheme was developed by employing an in-situ annealing strategy following the electrostatic self-assembled chemistry, with n-type ZnO and p-type Bi 2 O 3 as the constituent materials. Upon AM 1.5 G irradiation, the optimal ZnO/Bi 2 O 3 (Zn/BO) photocatalysts achieved a remarkable H 2 -evolution reaction (HER) rate of 458.3 μmol∙h −1 , which was 10.5 times higher than that of the original ZnO and 5 times higher than that of Bi 2 O 3 , respectively. Moreover, its efficiency in degrading 100 mg∙L −1 rhodamine B (RhB) reached 100% within a 60-minute period. Its rate constant was 24.70 and 11.71 times higher compared to ZnO and Bi 2 O 3 , respectively. The proposed Z-scheme mechanism of electron transfer was put forward to explain the observed enhancement in photocatalytic performance, as determined by in-situ XPS experiments. Furthermore, the Zn/BO photocatalyst exhibited exceptional catalytic activity when exposed to visible light (λ > 420 nm). The remarkable cycle stability of the hollow Z-scheme catalyst further suggests its potential for facilitating the industrialization of photocatalytic technology.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
·
IF 5.2
Minjie Bi,Xiaohang Wei,Qirui Lou,Duolong Di,Dong Pei,Baoqian Liu
Due to the low adsorption capacity and poor adsorption selectivity of the resins, the separation of flavonoids was still a challenge in the separation field. In this work, a novel polymer microspheres Polystyrene-divinylbenzene-poly(Glycidyl methacylate- p -phenylenediamine(PS-DVB-PGMA-PPD) containing PGMA polymer brushes was synthesized by combining surface-initiated atom-transfer radical polymerization (SI-ATRP) and p-phenylenediamine (PPD) modification.The physical and chemical properties of materials were characterized by different analytical methods. It was found that the adsorption process conformed to the pseudo–second–order kinetic model and Freundlich isotherm model. The thermodynamic parameters of quercetin adsorption process indicated that the adsorption was spontaneous and endothermic. The adsorption experiments showed that the polymer PS-DVB-PGMA-PPD had the best adsorption capacity onto quercetin , and the maximum adsorption capacity was 72.68 mg/g at 318.15 K. Compared with other flavonoids and alkaloids (such as theophylline , berberine and rutin), PS-DVB-PGMA-PPD had higher adsorption capacity and better selectivity for quercetin. Hydrogen bond interaction and π - π interaction may drive the adsorption process of quercetin. In addition, When the ethanol content was 95%, the desorption rate can reach 80.9%. PS-DVB-PGMA-PPD still had good adsorption performances for quercetin after five cycles, which indicated that the material had good renewable performances. In general, the results showed that its adsorption capacity for flavonoids from complex biological systems was excellent.
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JOURNAL OF MEMBRANE SCIENCE
·
2023
·
IF 9.5
Jiancong Lu,Biye Yang,Dan Lu,Yukun Qian,Tianzhuang Ye,Ge Li,Jing Wang,Zhikan Yao,Lei Jiao,Lin Zhang
Developing polyamide (PA) reverse osmosis (RO) membrane with chlorine resistance is of great significance for simplifying pretreatment processes and saving operating costs. Herein, we constructed an active layer capable of highly chlorine stability and regenerative chlorine resistance by introducing p-amino diphenylamine (p-ADA) with redox activity via a facile secondary interfacial reaction (s-IR) on PA membrane surface. The calculation of resistance-in-series model indicated that the introduction of p-ADA facilitated the increase of NaCl transmembrane resistance without sacrificing membrane permeance. Chlorination experiments under acid conditions proved the protection effect of p-ADA grafted layer due to its oxidation resistance, avoiding the direct attack by free chlorine to amide bonds of polyamide membrane. By virtue of the convertible modality of the p-ADA molecule between the quinone and benzene structures during redox process , modified membranes presented the capability of regenerative chlorine resistance. After the “chlorination-reduction” cycle experiments, the normalized flux of modified membranes remained 0.522 while contrasted PA membranes showed a flux of 0.278; and the corresponding normalized NaCl rejection of modified membranes maintained at 0.998 significantly higher than that of PA membranes (0.963). This study presents a straightforward and efficient approach to enhance the chlorine resistance of PA RO membranes.
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危险品化学品经营许可证（带存储）