ENVIRONMENTAL RESEARCH
·
2023
·
IF 8.3
Wenhui Chen,Tianxin Kang,Fenqi Du,Peipei Han,Meiling Gao,Peng Hu,Feng Teng,Haibo Fan
One-dimensional shaped ZnGa 2 O 4 , ZnO and ZnGa 2 O 4 /ZnO nanofibers were successfully prepared by electrostatic spinning technique and the photocatalytic degradation performance of tetracycline hydrochloride (TC-HCl) were studied. It was found that the S-scheme heterojunction formed in the ZnGa 2 O 4 /ZnO could greatly reduce the recombination of the photogenerated carriers and therefore improve the photocatalytic performance. By optimizing the ratio of the ZnGa 2 O 4 and ZnO, the largest degradation rate could reach 0.0573 min −1 , which was 20 times of the self-degradation rate of TC-HCl. It was verified that the h + played the key role in the reactive groups for the high performance decomposition of TC-HCl by capture experiments. This work provides a new method for the highly efficient photocatalytic degradation of TC-HCl.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2014
·Vol. 4
·期 54
·28683-28690
·
IF 3.708
Jie Feng,Zhifei Wang,Bin Shen,Liming Zhang,Xia Yang,Nongyue He
Mesoporous silica-coated Au nanorods (Aurod@SiO2) have recently attracted considerable interest in nanomedicine, and the template removal procedure is crucial for the preparation of such hybrid nanostructure. Herein, two kinds of typical extraction solvents, i.e., NH4NO3–CH3OH and HCl–CH3OH, were separately used to extract the surfactant cetyltrimethylammonium bromide (CTAB) from the obtained Aurod@SiO2. The results show that CTAB molecules could be completely removed from the pores of Aurod@SiO2 without damaging the internal Au nanorod by NH4NO3–CH3OH, while Aurod@SiO2 treated with HCl–CH3OH suffered from both poor extraction efficiency and the shape transformation of Au nanorod due to selective etching in the presence of oxygen. In addition, the consequent drug loading experiment shows that Aurod@SiO2 extracted by NH4NO3–CH3OH possesses a larger drug loading capacity with a loading efficiency of 82.5%. Furthermore, the in vitro photo-thermal therapy experiment shows that Aurod@SiO2 extracted by NH4NO3–CH3OH is more efficient in killing the YCC-2 gastric cancer cells as compared with that extracted by HCl–CH3OH.
研究领域:
纳米医学
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材料科学
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生物医学工程
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癌症研究
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产品关联
DOI
高影响因子
ACS ES&T Engineering
·
2021
·
IF 0
Lichun Li,Xiaoli Wei,Shenglan Zhou,Zhongsheng Jia,Chuanzhao Wang,Houlin Yu,Sen Wu,Ying Li,Wenfeng Han
Hydrochlorofluorocarbon (HCFC) has been widely applied as the third-generation refrigerant globally, however, the global warming potential of such gases is often 100 and 1000 times higher than that of CO2. Dehydrochlorination reaction offers an encouraging strategy to transform the high-global-warming-potential gases of hydrochlorofluorocarbons (HCFCs) to low-global-warming-potential gases of hydrofluoroolefins (HFOs). However, the handling of a large amount of byproduct HCl remains one of the major challenges blocking the industrialization of dehydrochlorination of HCFC-142a for the production of vinylidene fluoride (VDF). A one-pot cascade reaction combining dehydrochlorination of HCFC-142b and hydrochlorination of acetylene was first proposed to spontaneously produce valuable monomers of VDF and vinyl chloride monomer (VCM) while eliminating the tedious HCl treatment step. Both thermodynamic calculations and experimental results validate the feasibility of the cascade reaction. Five different heterogeneous catalysts were screened for the proposed cascade reaction, including monocomponent catalyst BaF2, NAC, bifunctional BaF2/NAC catalyst, and bicomponent BaF2-NAC-S and BaF2-NAC-M catalysts. Among them, the mixed BaF2-NAC-M catalyst demonstrated the best catalytic performance, with BaF2 mainly acting as the dehydrochlorination site and NAC mainly acting as the hydrochlorination site. The corresponding reaction mechanism was also proposed.
研究领域:
化学工程
·
催化
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环境化学
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绿色化学
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产品关联
DOI
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Xiaoxue Zhu,Kai Yang,Zhen Zhang,Siyuan He,Zihao Shen,Wei Jiang,Yiling Huang,Yan Xu,Qiutong Jiang,Limei Pan,Qian Li,Jian Yang
MXenes, represented by Ti3C2Tx, have been widely studied in the electrochemical energy storage fields, including lithium-ion batteries, for their unique two-dimensional structure, tunable surface chemistry, and excellent electrical conductivity. Recently, Nb2CTx, as a new type of MXene, has attracted more and more attention due to its high theoretical specific capacity of 542 mAh g–1. However, the preparation of few-layer Nb2CTx nanosheets with high-quality remains a challenge, which limits their research and application. In this work, high-quality few-layer Nb2CTx nanosheets with a large lateral size and a high conductivity of up to 500 S cm–1 were prepared by a simple HCl-LiF hydrothermal etching method, which is 2 orders of magnitude higher than that of previously reported Nb2CTx. Furthermore, from its aqueous ink, the viscosity-tunable organic few-layer Nb2CTx ink was prepared by HCl-induced flocculation and N-methyl-2-pyrrolidone treatment. When using the organic few-layer Nb2CTx ink as an additive-free anode of lithium-ion batteries, it showed excellent cycling performance with a reversible specific capacity of 524.0 mAh g–1 after 500 cycles at 0.5 A g–1 and 444.0 mAh g–1 after 5000 cycles at 1 A g–1. For rate performance, a specific capacity of 159.8 mAh g–1 was obtained at a high current density of 5 A g–1, and an excellent capacity retention rate of about 95.65% was achieved when the current density returned to 0.5 A g–1. This work presents a simple and scalable process for the preparation of high-quality Nb2CTx and its aqueous/organic ink, which demonstrates important application potential as electrodes for electrochemical energy storage devices.
研究领域:
材料科学
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电化学
·
能源存储
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2022
·
IF 6.633
Xiaohan Jin,Jingbao Wang,Siyuan Zheng,Jianan Li,Xuemei Ma,Li Feng,Hailin Zhu,Zhiyong Hu
Three triazine-based surfactants with different hydrophobic chain lengths were synthesized and characterized, namely, 2-(n-Hexylamino)-4,6-bis (3-N, N-dimethylaminopropyl) amino-1,3,5-triazine, 2-(n-Octylamino)-4,6-bis (3-N, N-dimethylaminopropyl) amino-1,3,5-triazine and 2-(n-n-Dodecylamino)-4,6-bis (3-N, N-dimethylaminopropyl) amino-1,3,5-triazine, labelled C 6 , C 8 and C 12 respectively. The chemical structure was confirmed by FTIR and 1 H NMR. The surface activity was evaluated by surface tension. C 12 had a lower critical micelle concentration (CMC) value (0.5 mM) than C 6 and C 8 , which suggested that a lower concentration was required to reach interfacial adsorption saturation, representing better inhibition performance. The corrosion inhibition of surfactants for 45 # carbon steel in 1.0 M HCl was studied by static weight loss measurement, electrochemical impedance spectroscopy (EIS), and potentiodynamic polarization. Inhibition results showed that C 12 was better than C 6 and C 8 with the maximum inhibition efficiency of 96% at 0.1 mM. The surface analysis had given a clear view of the mechanism of surfactants in inhibiting the corrosion process. Moreover, the Freundlich adsorption isotherm was the best description for the adsorption process of surfactants on 45 # carbon steel in 1.0 M HCl.
研究领域:
材料科学
·
腐蚀与防护
·
表面化学
✓ 已验证
DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2026
·
IF 6.9
Yulin Zhou,Shuang Tan,Qiangqiang Liu,Xingwen Zheng,Bochuan Tan,Riadh Marzouki
Background Q235 steel is susceptible to severe corrosion during the pickling process, especially in hydrochloric acid media, which not only shortens the service life of the equipment, but also may cause safety hazards and environmental pollution. Methods : A bis-triazole Schiff base carboxylic acid (BTSCA) was synthesized, named the 5-((4-(4H-1,2,4-triazol-4-yl) benzylidene) amino)-1H-1,2,4-triazole-3-carboxylic acid. The present study investigates the inhibitory performance of Q235 steel in a 1 M HCl solution containing BTSCA. The experimental methods adopted were weight loss method and electrochemical method. Significant findings : The results show that BTSCA has a good inhibitory efficiency on Q235 steel in 1 M HCl solution, which can reach 98.98%. Kinetic and thermodynamic analyses explained inhibitory mechanism of the compound, and the results showed that the adsorption behavior was in accordance with the Langmuir isotherm. The surface morphology of Q235 steel was characterized by scanning electron microscope (SEM) and atomic force microscope (AFM). Density functional theory (DFT) was used to analyze the inhibitory mechanism of BTSCA. Combined with molecular dynamics simulation (MD), the most stable configuration, adsorption sites and adsorption energy of BTSCA on the steel surface were determined.
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Li Feng,Shengtao Zhang,Yao Lu,Bochuan Tan,Shijin Chen,Lei Guo
The synergistic corrosion inhibition performance of 3, 3′-Diethylthiadicarbocyanine iodide (DI) and Thioflavin T (TT) for copper in 0.1 M HCl solution was investigated by electrochemical methods , weight loss tests and SEM . Besides, through the thermodynamics and kinetics analysis , the effects of temperature and concentration were explored. The XPS was also applied to study synergistic inhibition mechanism between anions and cations of ionic liquid . The results indicated that the inhibitor molecules interacted with copper forming protective film to inhibit corrosion by physical and chemical adsorption , also the organic cations and halogen ions had synergistic corrosion inhibition. With theoretical calculation and molecular dynamics simulation, the experiment validity was further assessed.
研究领域:
腐蚀科学
·
材料化学
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电化学
·
表面科学
·
物理化学
✓ 已验证
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Le Ruan,Zhe Zhang,Xiaodong Huang,Yuzeng Lyu,Yuqing Wen,Wei Shang,Ling Wu
The corrosion behavior of aromatic aldehyde Schiff bases self-assembled (SA) films on carbon steel (CS) surface was measured by electrochemical impedance spectroscopy (EIS) and polarization curves with different immersion time. The results showed that after assembling in two Schiff base solutions for 12 h, the corrosion efficiency of the SA films on CS surface reached 92.80% and 93.66%, respectively. Scanning electron microscopy (SEM) micrographs showed that the SA films can prevent CS corrosion in HCl solution. The quantum chemical calculations and dynamic simulations were employed for investigation of the inhibition mechanism.
研究领域:
材料腐蚀与防护
·
表面科学
·
电化学
·
金属材料学
·
物理化学
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2019
·
IF 7.467
Hezhen Yang,Ying Liu,Lingbin Kong,Long Kang,Fen Ran
Gel polymer electrolyte for flexible energy storage devices such as supercapacitors and rechargeable batteries attracts widespread attentions. Herein, we fabricate a flexible, transparent, and eco-friendly gel polymer electrolyte film based on biodegradable polymer of the carboxylated chitosan via phase separation of carboxylated chitosan hydrogel in hydrochloric acid . HCl is the key chemical for crosslinking of film forming, and the process is simple, rapid and non-polluting. The obtained carboxylated chitosan hydrogel film with excellent flexibility exhibits a highest electrolyte uptake rate of 742.0 wt %, and a highest ionic conductivity of 8.69 × 10 −2 S cm −1 . A symmetric all-solid-state supercapacitors using carbon cloth as current collectors, activated carbon film as electrodes, and carboxylated chitosan hydrogel film as a gel polymer electrolyte shows a high specific capacitance of 45.9 F g −1 at 0.5 A g −1 , and the maximum energy density of 5.2 Wh kg −1 at a power density of 226.6 W kg −1 . To our knowledge, this is the first time that carboxylated chitosan hydrogel film being used as gel polymer electrolyte for supercapacitors electrolyte. The good results indicate that the carboxylated chitosan as a new gel polymer electrolyte material has great potential in practical applications of all-solid-state, flexible, and portable energy storage devices.
研究领域:
材料科学
·
能源存储
·
生物材料
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产品关联
DOI
高影响因子
Materials
·
2019
·Vol. 12
·期 8
·1339
·
IF 2.972
Shenying Xu,Shengtao Zhang,Lei Guo,Li Feng,Bochuan Tan
In this work, two indazole derivatives, namely 5-aminoindazole (AIA) and 5-nitroindazole (NIA), were investigated as corrosion inhibitors for carbon steel in 1 M HCl solution by experimental and density functional theory (DFT) methods. The electrochemical results indicate that the inhibition ability follows the order of AIA > NIA, which is due to the stronger electron-donating effect of –NH2of the AIA group than the –NO2group of NIA. Besides, the frontier orbital theory shows that the AIA exhibits higher reaction activity than NIA, and a more negative adsorption energy for AIA was also obtained, which is consistent with the analysis of the electrochemical measurements. We draw the conclusion that the electron-donating effect makes it easier for AIA to donate electrons to iron atoms to form a stronger protective layer than NIA.Keywords:corrosion inhibitor;carbon steel;indazole derivatives;electrochemistry;DFT
研究领域:
材料科学
·
化学工程
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DOI
PubMed
高影响因子
CURRENT APPLIED PHYSICS
·
2022
·
IF 2.856
Xiaoxue Lian,Yan Li,Yunling Zou,Dongmin An,Qiong Wang,Qingjun Zhou,Xueqi Li
The g-C 3 N 4 nanosheets were synthesized by a multistage program calcination with different heating rate, which was an easy, low-cost, and quick method. The morphology and structure of samples were characterized by various techniques. The performance evaluation of the samples was tested by degrading Rhodamine B, Methylene Blue, Tetracycline Hydrochloride and P-Nitrophenol in visible light . The results show that the photodegradation properties of TP-g-C 3 N 4 prepared by multistage program calcination are the best than others. In particular, the degradation rate of TP-g-C 3 N 4 to Rhodamine B reached 99.6% in just 4 min. TP-g-C 3 N 4 catalyst has excellent stability and recycling performance. According to free radical capture experiments, •O 2 − may be the main active species for pollutant degradation. The possible photocatalytic degradation mechanism was also discussed. Due to the high specific surface area and a narrow band gap, the TP-g-C 3 N 4 becomes a promising photocatalyst.
研究领域:
材料科学
·
环境科学
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Yin Yang,Renling Lu,Wu Chen,Ping Mei,Lu Lai
Three amphiphilic carbon dots (CDs, C 6 -CDs, C 8 -CDs, and C 12 -CDs) were synthesized and first adopted as a corrosion inhibitor for mild steel. The inhibition behavior of amphiphilic CDs for N80 steel in hydrochloric acid solution was studied via weight loss tests, surface characterization , and electrochemical measurements. Results confirmed that they could protect N80 steel effectively; the longer the carbon chain was, the better the inhibition effect was. Specifically, the inhibition efficiency of C 12 -CDs reached 92.9 % at 150 mg/L. Moreover, due to the fluorescence characteristics of CDs, the changes in adsorption film during corrosion could be directly observed under UV light . A dense adsorption film was formed through the electrostatic interaction with CDs and the metal surface . Long carbon chains formed a hydrophobic layer on the surface of N80 to isolate the corrosive medium.
研究领域:
材料科学
·
腐蚀与防护
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）