ACS Applied Energy Materials
·
2022
·
IF 6.959
Youlin Wu,Pengfei Zhu,Youji Li,Lijun Zhang,Zhiliang Jin
Owing to the creation of a large number of surface active sites, surface modification is an efficient strategy for improving the catalytic performances of photocatalysts. Herein, zero-dimensional (0D) p-type NiS species were developed in situ on the large surface of NiAl-LDH by controlled vulcanization. Importantly, the development of the 0D p-type NiS species not only enriched the active sites but also triggered the in situ formation of a NiS/NiAl-LDH p–n heterojunction due to NiAl-LDH, which was utterly underdeveloped in the vulcanization modification procedure. This undoubtedly accelerated the faster separation and migration of charge carriers and yielded improved photocatalytic hydrogen evolution. The optimum hydrogen production rate of the NiS/NiAl-LDH photocatalyst could reach 3408 μmol·g–1·h–1 using a 5 W LED simulation visible light, which was 52-fold that of NiAl-LDH. The design and construction of the in situ p–n heterojunction may provide a perspective for the formation of p–n heterojunction photocatalysts with a closer contact interface and highly enhanced photocatalytic activity.
研究领域:
材料科学
·
化学工程
·
催化
·
纳米技术
✓ 已验证
DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2021
·
IF 6.064
Lezhu Su,Lizhou Ou,Yujiao Wen,Yifan Wang,Weilin Zhao,Zhi Zhou,Mei-e Zhong,Yongfa Zhu,Nan Zhou
Exploring catalyst materials which are advancing, recyclable and with high catalytic performances to remove persistent organic pollutants such as Quinclorac (QNC) is important. In this work, a novel N-doped carbon support CoFe 2 O 4 /Fe 0 hybrid catalyst (CFO/Fe@C) was in situ formed by a simple co-precipitation and calcination process. Fine intergrowth crystal CoFe 2 O 4 and Fe 0 were uniformly dispersed on the N-doped porous carbon that derived from the raw material Ethylene Diamine Tetraacetic Acid (EDTA), which also provided chelating effect to prevent the agglomeration of the metals. Interestingly, the Fe 0 could only be formed with the presence of cobalt, possibly due to the increased reduction property resulted from the particle refinement. The as-formed Fe 0 could not only activate the peroxymonosulfate (PMS) but also reduce the Co 3+ , resulting in a synergistic impact to remarkably enhance the degradation performance. Besides, the N-doped porous carbon can also benefit the degradation of pollutant by strengthening the electron transfer. A good degradation efficiency of QNC was obtained in CFO/Fe@C-PMS system and most of the QNC had been degraded to carbon dioxide , water and other small molecular organisms. The removal rate remained over 70% after four reuses and the material could be easily recovered from the solution due to the good magnetic properties. Therefore, the as-prepared CFO/Fe@C catalyst should be an ideal catalyst for the removal of organic pollutants .
研究领域:
环境科学
·
催化材料科学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2017
·
IF 3.359
Fan Hu,Chuanjie Fang,Zhanghui Wang,Cuijing Liu,Baoku Zhu,Liping Zhu
In this paper we demonstrate the fabrication and properties of a novel poly (N-vinyl imidazole) (PVI) gel composite porous membrane (GCM) used for rapid separation of dyes through permeating adsorption. The GCMs were fabricated by in situ crosslinking of PVI precursor on microporous support membranes with the aid of ammonium persulfate (APS). The characterizations of membrane morphology and surface chemistry showed the PVI gel was introduced not only onto membrane surface but also inside membrane pores. The obtained GCMs could nearly completely remove various anionic dyes from water with a high flux ranging from 40 to 120 L/m 2 h under a pressure of 8 cm water column. In an optimized case, the treating capacity of the composite membranes towards sunset yellow (SY) maintains about 79 mg/g with a high flux of 500 L/m 2 h under 0.2 bar. The permeation rates reported here is much higher than that of the conventional nanofiltration process for dye separation (about 10 L/m 2 h·bar). What's more, GCMs can also be used to deploy the separation of dye mixture effectively. It was found that the protonation of PVI in acidic environment is responsible for the rapid adsorption of anionic dyes by electrostatic attraction. GCMs are easily regenerated by a basic solution and the high separation performance can be kept well over at least five adsorption-regeneration cycles.
研究领域:
材料科学
·
环境工程
·
化学工程
✓ 已验证
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2017
·
IF 2.536
Yuan Guo,Xiaoqing Zeng,Haiyan Yuan,Yunmei Huang,Yanmei Zhao,Huan Wu,Jidong Yang
In this study, a novel method for chiral recognition of phenylglycinol (PG) enantiomers was proposed. Firstly, water-soluble N -acetyl- l -cysteine (NALC)-capped CdTe quantum dots (QDs) were synthesized and experiment showed that the fluorescence intensity of the reaction system slightly enhancement when added PG enantiomers to NALC-capped CdTe quantum dots (QDs), but the R-PG and S-PG could not be distinguished. Secondly, when there was Ag + presence in the reaction system, the experiment result was extremely interesting, the PG enantiomers cloud make NALC-capped CdTe QDs produce different fluorescence signal, in which the fluorescence of S-PG + Ag + + NALC-CdTe system was significantly enhanced, and the fluorescence of R-PG + Ag + + NALC-CdTe system was markedly decreased. Thirdly, all the enhanced and decreased of the fluorescence intensity were directly proportional to the concentration of R-PG and S-PG in the linearly range 10 − 5 –10 − 7 mol·L − 1 , respectively. So, the new method for simultaneous determination of the PG enantiomers was built too. The experiment result of the method was satisfactory with the detection limit of PG can reached 10 − 7 mol·L − 1 and the related coefficient of S-PG and R-PG are 0.995 and 0.980, respectively. The method was highly sensitive, selective and had wider detection range compared with other methods.
研究领域:
分析化学
·
生物化学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Pei Qiu,Jinyan Xiong,Mengjie Lu,Lijun Liu,Wei Li,Zhipan Wen,Weijie Li,Rong Chen,Gang Cheng
Solar-driven photocatalytic H 2 evolution could tackle the issue of fossil fuels-triggered greenhouse gas emission with sustainable clean energy. However, splitting water into hydrogen with high performance by a single semiconductor is challenging because of the poor charge separation efficiency. Herein, a novel ternary Cu@TiO 2 -Cu 2 O hybrid photocatalyst with multiple charge transfer channels has been designed for efficient solar-to-hydrogen evolution. Indeed, the ternary Cu@TiO 2 -Cu 2 O hybrid by coupling Cu@TiO 2 with Cu 2 O nanoparticles shows highly-efficient photocatalytic hydrogen generation with rate of 12000.6 μmol·g −1 ·h −1 , which is 4.4, 2.1, and 1.9 times higher than the pure TiO 2 (2728.8 μmol·g −1 ·h −1 ), binary Cu@TiO 2 (5595.5 μmol·g −1 ·h −1 ), and TiO 2 -Cu 2 O (6076.8 μmol·g −1 ·h −1 ) composite, respectively. In such a Cu@TiO 2 -Cu 2 O hybrid, the formed internal electric field in the TiO 2 -Cu 2 O p-n junction allows the electrons in Cu 2 O to migrate to TiO 2 , while the electrons in the CB of TiO 2 could flow into Cu via the Schottky junction at the Cu@TiO 2 interface. In this regard, a multiple charge transfer is achieved between the Cu@TiO 2 and Cu 2 O, which facilitates promoted charge separation and results in the construction of electron-accumulated center (Cu) and hole-enriched surface (Cu 2 O). This p-n/Schottky junctions with steered charge transfer assists the hydrogen production upon the Cu@TiO 2 -Cu 2 O ternary photocatalyst.
研究领域:
材料科学
·
能源科学
·
环境科学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2014
·
IF 5.9
Lingling Wang,Hui Huang,Songhua Xiao,Daoping Cai,Yuan Liu,Bin Liu,Dandan Wang,Chenxia Wang,Han Li,Yanrong Wang,Qiuhong Li,Taihong Wang
We report a room-temperature NH3 gas sensor with high response and great long-term stability, including CeO2 NPs conformally coated by cross-linked PANI hydrogel. Such core–shell nanocomposites were prepared by in situ polymerization with different weight ratios of CeO2 NPs and aniline. At room temperature, the nanohybrids showed enhanced response (6.5 to 50 ppm of NH3), which could be attributed to p–n junctions formed by the intimate contact between these two materials. Moreover, the stability was discussed in terms of phytic acid working as a gelator, which helped the PANI sheath accommodate itself and enhance the mechanical strength and chemical stability of the sensors by avoiding “swelling effect” in high relative humidity. The sensors maintained its sensing characteristic (response of ca. 6.5 to 50 ppm of NH3) in 15 days. Herein, the obtained results could help to accelerate the development of ammonia gas sensor.
研究领域:
材料科学
·
传感器技术
✓ 已验证
DOI
PubMed
高影响因子
DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY
·
2021
·
IF 3.636
Ling Zhang,Li-na Yao,Wei Liu,An-qi Chen,Shi-min He,Mei-li Wei,Zi-xuan Fan,Da-long Ren
N-acetylcholine receptors (AChRs) are mainly distributed in the postsynaptic membrane and have been widely studied for their control of muscle contraction by regulating neural action potentials. However, the influences of AChRs on immune responses and potential mechanisms remain unclear. Here, we used the advantages of live imaging of zebrafish to explore the regulation process of AChRs on inflammatory responses. Pharmacologically activating of the receptor, we found that the expression of pro-inflammatory cytokines il-1β, il-6, tnf-α and il-8 was significantly up-regulated and neutrophil migration to injury sites was also significantly increased. However, these phenomena were reversed under antagonism of the receptor activity. Results showed that interfering with nAChRs functions did not significantly affect zebrafish motion behavior. Results also showed that activation and antagonism of nAChRs function could regulate the phosphorylation of ERK protein respectively. We further demonstrated that ERK participated in the regulation of AChRs in cytokines expression and neutrophils migration in zebrafish. This study preliminarily revealed the roles of AChRs in inflammatory processes and their potential mechanism, providing additional evidence of peripheral immune regulation by cholinergic receptors.
研究领域:
免疫学
·
神经科学
·
斑马鱼生物学
✓ 已验证
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2015
·
IF 2.711
Zailin Gong,Shujin Li,Weifang Han,Jiaping Wang,Jun Ma,Xiangdong Zhang
The graphene oxide (GO) was synthesized with Brodie's method and grafted with poly ( N -isopropylacrylamide) (NIPAM) in aqueous solution at ambient temperature. Compared with the initial GO, the PNIPAM graft GO (GO-PNIPAM) has larger surface area, pore volume and self-flocculation effect with rapid response to temperature. Moreover, the GO-PNIPAM also has selective adsorptions with different phenol pollutants because of the different interactions of hydrogen bonds and the molecule structure of the adsorbates. Compared with phenol and bisphenol A, hydroquinone has better adsorption on GO-PNIPAM because of the ample phenolic hydroxyl group and the appropriate molecule structure. The adsorption performance of hydroquinone on GO-PNIPAM is also temperature sensitive because of the thermoresponsive transition of the hydrogen bond. The thermoresponsive adsorption and self-flocculation will make the GO-PNIPAM recyclable in the potential water remediation.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2022
·
IF 3.119
Yingmin Yu,Fangyu Zhang,Xiaocheng Zhang
The liquid–liquid equilibrium (LLE) data for the ternary systems of {n-octanol + ethylene glycol + solvents (water/n-heptane/n-hexane/1-hexene/1-chlorobutane)} at 298.2 K under 101.3 kPa were determined. The solute distribution constant and selectivity were used to analyze the solvent’s extraction ability. Meanwhile, the NRTL and UNIQUAC models were applied to correlate the experimental LLE data, and the binary interaction parameters were obtained. The root mean square deviation (RMSD) between the experimental data measured and the calculated by the NRTL and UNIQUAC models was less than 3%. The binary interaction parameters have been confirmed by GUI-MATLAB.
研究领域:
化学工程
·
物理化学
✓ 已验证
DOI
高影响因子
Catalysts
·
2024
·Vol. 14
·期 11
·797
·
IF 3.8
Hanyang Zhang,Wen Liu,Jiale Hu,Qian Zhang,Zeguo Fang,Dong Li
An efficient method involving copper-catalyzed trifluoromethylthiolation and radical cyclization ofN-phenylpent-4-enamides using readily available and stable AgSCF3as the trifluoromethylthiolating reagent is described. The method enables the synthesis of a series of potential medicinally valuable trifluoromethylthio-substitutedγ-lactams and relative 2-oxazolidinone derivatives with broad functional group compatibility. Mechanistic investigations indicated that this reaction involved amidyl radical-initiated cascade5-exo-trigcyclization followed by trifluoromethylthiolation, resulting in the formation of new C-N and C-S bonds.
研究领域:
有机化学
·
药物化学
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2024
·Vol. 31
·期 17
·25952-25963
·
IF 0
Di Hongcheng,Jiang Zhuwu,Sun Fengyi,Yang Jiahan,Cheng Wei,Lu Jiahui,Zhang Hongyu,Bai Xue
Nitrogen-containing disinfection by-products (N-DBPs) produced in the process of drinking water disinfection are widely concerning due to the high cytotoxicity and genotoxicity. It is due to the difficulty of natural degradation of N-DBPs in water and the fact that conventional treatment systems do not effectively treat N-DBPs in drinking water. In this study, N-nitrosopyrrolidine (NPYR) in water was electrocatalytically degraded by a three-dimensional electrode reactor (3DER). This system applied graphite plates as anode and cathode. The granular activated carbon (GAC) was used as third electrode. The degradation of NPYR using a continuous flow three-dimensional electrode reactor was investigated by examining the effects of flow rate, current density, electrolyte concentration, and pollutant concentration on the degradation efficiency, energy consumption, and reaction kinetics of GAC particle electrodes. The results showed that the optimal operating conditions were flow rate = 0.45 mL/min, current density = 6 mA/cm 2 , Na 2 SO 4 concentration = 0.28 mol/L, and NPYR concentration = 20 mg/L. Under optimal conditions, the degradation of NPYR exceeded 58.84%. The main contributor of indirect oxidation was deduced from free radical quenching experiments. NPYR concentration was measured by GC–MS with DB-5 capillary column, operating in full scan monitoring mode for appropriate quantification of NPYR and intermediates. Based on the identification of reaction intermediates, a possible pathway for the electrochemical oxidation of NPYR on GAC particle electrodes was proposed.
研究领域:
环境科学
·
化学工程
·
饮用水处理
✓ 已验证
DOI
PubMed
Nature Communications
·
2024
·Vol. 15
·期 1
·1-13
·
IF 14.7
Xu Chenyang,Wang Hongxin,Guo Hongying,Liang Ke,Zhang Yuanming,Li Weicong,Chen Junze,Lee Jae Sung,Zhang Hemin
Developing transparent and efficient photoanodes is a challenging but essential task in tandem photoelectrochemical cell for unassisted solar water splitting without an external bias. Here we report construction of p–n homojunction hematite photoanodes by hybrid microwave annealing-induced single antimony doping, which results in the gradually-increased valence states from the surface to the inside by the unique features of hybrid microwave annealing. The Sb-doped p–n homojunction hematite photoanode exhibits improved performance and displays a good transparency, achieving a stable photocurrent density of ~4.21 mA cm −2 at 1.23 V RHE under 100 mW cm −2 solar irradiation, which is comparable to the reported state-of-the-art hematite photoanodes. More importantly, a parallel-connected stack of six photoanodes of transparent p–n homojunction records a near-theoretical photocurrent density of ~10 mA cm –2 at 1.23 V RHE under standard photoelectrochemical water splitting conditions, which serves as a useful reference for hematite photoanodes and promises its practical application for unbiased photoelectrochemical water splitting.
研究领域:
材料科学
·
能源科学
·
光电化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）