MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
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2024
·
IF 4.2
Dechong Ma,Jiawei Tang,Guowen He,Yun Xue,Sai Pan,Fengjiao Liu,Jingzhe Zhao
This study utilized X-diffraction, BET, photoluminescence , UV–vis DRS, FTIR , SEM, XPS , TOC analysis, EPR , electrochemical measurements, and LC-MS to characterize the structural characteristics, morphology, optical properties , photocatalytic activity , surface electronic states, active compounds, and potential photodegradation pathways of rhodamine B (RhB) over as-prepared Bi 2 O 3. The as-prepared Bi 2 O 3 photocatalyst exhibited a narrow bandgap, which enabled efficient absorption of visible light, thereby contributing to its enhanced photocatalytic activity. Additionally, Bi 2 O 3 exhibited a high degradation efficiency for RhB. with up to 96.8 % of RhB removed within 120 min at pH 3.0. The excellent photocatalytic performance of Bi 2 O 3 can be attributed to the formation of the heterogeneous Bi 2 O 3 /BiOCl structure on the Bi 2 O 3 surface in the presence of HCl. Moreover, the TOC analysis revealed that over 58.1 % of the carbon in the RhB solution was mineralized into CO 2 after 120 min of irradiation. The effect of catalyst content, RhB concentration, initial pH, and inorganic anions on the photocatalytic degradation of RhB over Bi 2 O 3 was examined. Furthermore, the active compounds and potential photocatalytic mechanism of the Bi 2 O 3 /BiOCl heterogeneous structure toward RhB were evaluated. The intermediates formed during RhB degradation were identified, and the corresponding degradation pathway was deduced via LC-MS.
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
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Shenying Xu,Wenpo Li,Xiuli Zuo,Dongdong Zheng,Xingwen Zheng,Shengtao Zhang
The inhibition effect of 2-(2-Hydroxyphenyl)benzothiazole (HBT), a newly synthesized benzothiazole derivative, on mild steel in 1 M HCl medium has been investigated by utilizing weight loss measurements, electrochemical methods and morphology characterization. The results indicate that HBT exhibited a superior corrosion inhibition efficiency, which reached approximately 95% with the addition of 0.07 mM HBT. Electrochemical tests illustrate that HBT is a mixed-type inhibitor. According to the Langmuir adsorption isotherm, the thermodynamic and kinetic parameters of the adsorption process complied with a physical-adsorption mechanism. Furthermore, computational calculations based on density functional theory reveal the relation between the electronic properties and the inhibition efficiency. In combination with the value of pKa , the protonic form of HBT in corrosive medium was predicted.
研究领域:
材料科学
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电化学
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计算化学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
·
IF 16.744
Xin Xu,Huijun Li,Zhouqing Xu
The development of multifunctional luminescent switch for the detection of different targets is highly desirable because of the complexity of the environment. In this paper, novel porous fluorescent Metal–Organic Framework (HPU-23), which can visually detect gaseous hydrogen chloride (HCl) and trace water from organic solvents through the fluorescence quenching phenomena, are designed. Besides, after the fluorescence of HPU-23 quenching by HCl, HPU-23 can be reopened by gaseous triethylamine (TEA) treatment. HPU-23 also could detect trace water from organic solvents. Although the quenching of fluorescence is also observed, the sensor after sensing H 2 O cannot be regenerated by any treatment. Besides, another Pb 2+ sensor is obtained when a new luminophore, i.e., tris(2,2′-bipyridine) dichlororuthenium(II) hexahydrate (Ru(bpy) 3 2+ ), is added into an aqueous system containing HPU-23. Therefore, our strategy is a promising broadcast for the development of multifunctional sensors.
研究领域:
材料科学
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分析化学
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DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2023
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IF 7.4
Min Li,Jiaqi Tang,Yan Luo,Jinglun Yang,Jianfei Liu,Junxia Peng,Yu Fang
A new kind of imine bond-based fluorescent nanofilm was developed as multifunctional materials for high-performance detection and efficient removal of hydrogen chloride (HCl) and ammonia (NH3). The flexible, uniform, and photochemically stable nanofilms as prepared showed fast (<1 and <0.5 s), sensitive (<150 ppb and <1.5 ppm), and selective response to HCl and NH3, respectively, and the removal efficiencies to HCl and NH3 are 187.5 and 37.5% (w/w), respectively. A reversible earthy-red to green fluorescence color change upon adsorption of NH3 or HCl enabled visualized monitoring of the two gases in the air. Mechanism studies revealed that the adsorption of HCl is a result of hydrogen bond formation between the analyte and the imine groups. Adsorption of NH3, however, is a result of chemical reaction with the pre-adsorbed HCl. The applicability of the detection and removal strategies as developed was further verified by conducting the tests on real-life or simulated scenarios.
研究领域:
材料科学
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环境科学
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化学
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DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2025
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IF 4.7
Zengfeng Wei,Yumeng Zhang,Hu Xia,Lijie Ni,Wenhai Wu,Xiaoning Wang,Heng Quan
A novel bio-based corrosion inhibitor, hexadecyl amine-modified catechol (CA16), was synthesized, and its molecular structure was characterized. The ability of CA16 to inhibit the corrosion of carbon steel in 1 M HCl was evaluated by potentiodynamic polarization, electrochemical impedance spectroscopy and weight loss. The highest inhibition efficiency reached 96.87% at 10 −3 M. CA16 is a mixed-type corrosion inhibitor that can adsorb on the Fe surface spontaneously through chemical adsorption following the Langmuir adsorption model. The adsorption of CA16 and carbon steel occurred between catechol groups and the Fe surface, as confirmed by quantum chemical calculations and molecular dynamic simulations. This novel bio-derived high-performance inhibitor offers a sustainable alternative to conventional petrochemical-based counterparts, demonstrating significant potential for industrial-scale applications while aligning with green chemistry principles.
研究领域:
材料科学
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绿色化学
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电化学
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产品关联
DOI
高影响因子
APPLIED GEOCHEMISTRY
·
2021
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IF 3.524
Yong Liu,Jingfu Wang,Haiquan Yang,Shihao Jiang,Zuxue Jin,Jingan Chen
The oxygen isotope ratio in phosphate (δ 18 O P ) is an effective tool for tracing the sources of phosphorus (P) and their biogeochemical cycles . The HCl-extractable inorganic phosphate (HCl-P TI ) is the primary component of P and plays a key role in the dynamic transformation of P in sediment and soil. However, it has always been difficult to purity sample for analyzing the δ 18 O P composition of HCl-P TI due to the significantly interference of large amounts of Fe 2+/3+ , Ca 2+ , Cl − and other impurities in the HCl-P TI extracts. In this study, we developed a simple and promising purification method for δ 18 O P analysis of HCl-P TI in sediments and soils based on the superior selective enrichment and elution abilities of phosphate (PO 4 ) and efficient synchronous removal of impurities by Zr-Oxide gel in highly acidic HCl-P TI extract. The enrichment rate and elution rate of PO 4 in the HCl-P TI extract by the Zr-Oxide gel could achieve 100% respectively, and the synchronous removal rates of most anions, dissolved organic carbon (DOC), metals, and trace elements could be above 96% respectively, reducing the tedious operation of conventional methods and the difficulties in removal of impurities, such as Cl − in HCl-P TI extract. It's indicated that the purity of the Ag 3 PO 4 solid for δ 18 O P composition analysis of HCl-P TI could reach 99.9%. The above results show that the new method is very simple, efficient and reliable for the δ 18 O P analysis of HCl-P TI in sediments and soils. This study provides new methodological support for identifying the sources of P and tracing their biogeochemical cycles in sediment or soil environment.
研究领域:
环境科学
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土壤学
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产品关联
DOI
高影响因子
ACS Omega
·
2018
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IF 0
Tingting Cheng,Jian Chen,Aofei Cai,Jian Wang,Haiyan Liu,Yuandong Hu,Xiaojun Bao,Pei Yuan
A series of silica supported Pd (Pd/SiO2) catalysts were prepared in various HCl concentrations (CHCl) of the impregnation solution with different electrostatic interactions between Pd precursor and support, and their catalytic properties were evaluated by the selective hydrogenation of nitrile butadiene rubber (NBR). The results show that with the CHCl increasing from 0.1 to 5 M, the particle size of Pd nanoparticles dramatically decreases from 24.2 to 5.1 nm and stabilizes at ∼5 nm when CHCl is higher than 2 M. Using the catalysts prepared with a high CHCl (>2 M), an excellent hydrogenation degree (HD) of ∼94% with 100% selectivity to C═C can be acquired under mild conditions. Interestingly, the HD could be remarkably increased from 65 to 92% by increasing only CCl– from 0.1 to 2 M with the addition of NaCl while keeping CH+ at 0.1 M. This is because PdCl42– is the predominant existing form of precursor at high CCl–, which has a strong electrostatic attraction with the positively charged support favorable for the formation of small-sized Pd nanoparticles over silica. Notably, Pd leaching behavior during the hydrogenation reaction is closely related to CH+, and the higher the CH+, the less Pd residues are detected in the hydrogenated NBR. Our contribution is to provide a facile strategy to synthesize effective and stable Pd/SiO2 catalysts via adjusting the electrostatic interaction, which exhibits a high activity and selectivity for NBR hydrogenation.
研究领域:
催化化学
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材料科学
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产品关联
DOI
PubMed
RSC Advances
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2019
·Vol. 9
·期 52
·30249-30258
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IF 3.049
Feng Yang,Yu Liu,Tong Liu,Shuan Liu,Haichao Zhao
In this work, a water-soluble host–guest complex containing carboxymethylated beta-cyclodextrin (CM-β-CD) and an aniline trimer (AT) was synthesized. The application of AT–CM-β-CD as an inhibitor for alleviating the corrosion of Q235 carbon steel in 1 M HCl solution was investigated by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). Results showed that the inhibition efficiency was significantly increased in the presence of AT–CM-β-CD, and the inhibition efficiency was up to 99.2% when the concentration of AT–CM-β-CD was 250 mg L−1. Field emission scanning electron microscopy (SEM) and laser scanning confocal microscopy (LSCM) confirmed that the corrosion inhibitor had excellent corrosion inhibition effects due to the formation of an adsorption film on the surface of Q235 carbon steel. According to the data extracted from the Langmuir adsorption model, AT–CM-β-CD absorption involves both physisorption and chemisorption.
研究领域:
材料科学
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电化学
·
腐蚀与防护
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产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 35
·21607-21621
·
IF 3.361
Mingjun Cui,Xia Li
Novel nitrogen and sulfur co-doped carbon dots (N,S-CDs) were synthesized via a hydrothermal procedure using citric acid (CA) and thiourea (TU) as precursors, and the corresponding corrosion protection performance was first investigated for Q235 carbon steel in 1 M HCl solution. Experimental results indicated that N,S-CDs as mixed-type corrosion inhibitors could effectively prevent Q235 carbon steel from corrosion in 1 M HCl solution, and the corrosion inhibition efficiency was improved with the increase in N,S-CD concentration. The maximum value was achieved at 400 ppm of N,S-CDs at 25 °C, which was approximately 96.6%, 94.6% and 90.55%, according to the potentiodynamic polarization curves, EIS results and weight loss measurement, respectively. Additionally, with the temperature ranging from 25 to 55 °C, the inhibition efficiency obtained from the weight loss measurement was enhanced from 90.55% to 94.04%. Such superior inhibition effect was assigned to the physisorption and chemisorption of N,S-CDs on the Q235 carbon steel surface, which was also be confirmed by XPS analysis. The adsorption of N,S-CDs onto a steel substrate conformed to the Langmuir adsorption isotherm.
研究领域:
材料科学
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腐蚀与防护
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表面化学
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产品关联
DOI
PubMed
高影响因子
Catalysts
·
2019
·Vol. 9
·期 2
·108
·
IF 3.444
Jian Shi,Feng Hui,Jun Yuan,Qinwei Yu,Suning Mei,Qian Zhang,Jialin Li,Weiqiang Wang,Jianming Yang,Jian Lu
Several Ru-Ti oxide-based catalysts were investigated for the catalytic oxidation of HCl to Cl2in this work. The active component RuO2was loaded on different titanium-containing supports by a facile wetness impregnation method. The Ru-Ti oxide based catalysts were characterized by XRD, N2sorption, SEM, TEM, H2-TPR, XPS, and Raman, which is correlated with the catalytic tests. Rutile TiO2was confirmed as the optimal support even though it has a low specific surface area. In addition to the interfacial epitaxial lattice matching and epitaxy, the extraordinary performance of Ru-Ti rutile oxide could also be attributed to the favorable oxygen species on Ru sites and specific active phase-support interactions. On the other hand, the influence of additive Ce on the RuO2/TiO2-rutile was studied. The incorporation of Ce by varied methods resulted in further oxidation of RuO2into RuO2δ+and a modification of the support structure. The amount of favorable oxygen species on the surface was decreased. As a result, the Deacon activity was lowered. It was demonstrated that the surface oxygen species and specific interactions of the Ru-Ti rutile oxide were critical to HCl oxidation.
研究领域:
催化化学
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材料科学
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环境化学
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无机化学
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化学工程
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Jian Shi,Jialin Li,Hui Ma,Donghuai Tu,Qian Zhang,Wei Mao,Jianming Yang,Jian Lu
RuO 2 supported on rutile TiO 2 or SnO 2 has been proved extremely effective for catalyzing the oxidation of HCl into Cl 2 . The supports play a crucial role in the catalyst systems. In this work, Ti-Sn oxides with different Sn/(Sn + Ti) molar ratios (0–0.2) were synthesized by a facile co-precipitation method as supports. The corresponding Ru/Ti-Sn oxide catalysts were investigated in HCl catalytic oxidation and systematically characterized to elucidate the role of Ti-Sn oxide supports on the process. The diffraction, spectroscopy and microscopy results reveal the crystal and surface structures of supports and catalysts. Among all the RuO 2 /Ti 1-x Sn x O 2 catalysts, RuO 2 /Ti 0.97 Sn 0.03 O 2 exhibits the best catalytic activity of 2.6 g Cl 2 ·g cat -1 ·h −1 with only 0.5% Ru loading and excellent stability on stream. Differed from the previous understanding, Ti 0.8 Sn 0.2 O 2 support containing the most rutile phase shows unsatisfying performance. The excessive Sn content renders more crystal disorder and volatile substrate, inevitably lowering the dispersion and stabilization of RuO 2 active phase. However, moderate Sn addition induces well-dispersed SnO 2 and rutile TiO 2 film, facilitating the dispersion of RuO 2 phase on the support surface with more active oxygen species. A large number of oxygen vacancies on Ti 0.97 Sn 0.03 O 2 can act as an active oxygen reservoir and boost catalytic performance.
研究领域:
化学工程
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催化科学
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材料科学
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DOI
高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2024
·Vol. 110
·期 2
·333-345
·
IF 2.3
Peng Jia,Wu Hongdan,Zhou Zhihui,Li Rongxue
Boron-doped silica membrane (B-SiO 2 membrane) was prepared using the sol-gel method, with 1, 2-bis(triethoxysiliconyl) ethane (BTESE) and boric acid as raw materials and ethanol as the solvent. The effects of the B/BTESE molar composition and feed liquid temperature on the structure and dewatering properties of the B-SiO 2 membranes were investigated. The results show that boron is successfully doped into the SiO 2 skeleton, Si-C-C-Si bond condensation forms lots of hydrothermal stable Si-O-B bonds and Si-O-Si bonds, resulting in an increase in surface hydrophilicity, a decrease in pore size and an improvement in pervaporation and dehydration performance. The B-SiO 2 membrane was subjected to HCl post-treatment to evaluate its long-term stability. Following boron acid modification and HCl post-treatment, all the SiO 2 membranes exhibited microporous characteristics with a decrease in the specific surface area and pore size. Although membranes’ thickness showed minimal variation, the pervaporation dehydration performance was substantially enhanced. After a 216 h long-term stability test, the membranes exhibited excellent performance, with a stable flux of 2.61 kg·m −2 ·h −1 and a separation factor above 552. Graphical
研究领域:
膜科学
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化学工程
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材料科学
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分离技术
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DOI
高影响因子
危险品化学品经营许可证（带存储）