CHEMICAL ENGINEERING JOURNAL
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2018
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IF 6.735
Meijie Ren,Ping Ning,Jie Xu,Guangfei Qu,Ruosong Xie
Ceric ammonium nitrate manufacture generated a large number of acidic wastewater, which contained a certain amount of ceric. To treatment this wastewater and recovery the ceric resource and waste acid, an electrodialysis-vacuum membrane distillation (ED-VMD) hybrid system was introduced. To establish a stable and efficient system, a series of membrane materials, performance parameters and solution properties were investigated. It was found that NO 3 − could be separated from Ce 4+ and recovered efficiently in ED system. pH value of Cerium wastewater decreased in the ED process which ensured a stable and reliable operation of the following concentration technology. The high resistance of Ce 4+ and high NO 3 − recovery efficiency in ED anode compartment supplied an opportunity for industry waste acid recycling as well. The VMD process provided more than 99.9% rejection of Ce 4+ and concentrated it maximally. Furthermore, membrane cleaning procedures were discussed in order to keep the high efficiency of VMD system. The results implied that vapor condensation inside the pores was the main reason caused membrane fouling and flux decreasing. And the drying procedure was the most efficient cleaning method. This work provided a potential treatment process for rare earth metals wastewater treatment, which decreased the wastewater discharge and recycled the resource in some field.
研究领域:
环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
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2020
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IF 2.87
Pakapa Thiangpak,Aphichart Rodchanarowan
The shape-memory epoxy (SME) mixed with 10 wt % polycaprolactone (PCL) microspheres containing 5% cerium(III) nitrate (Ce(NO3)3) (PCL5Ce) was coated on an aluminum plate 2024-T3 to investigate the self-healing property. The coating was scratched and heated at 80 °C for 30 min to activate the self-healing mechanism and compare with a nonscratched coating. Surface morphology was investigated by scanning electron microscopy. The scratch was completely healed by the PCL5Ce via a thermally assisted self-healing process. Based on electrochemical impedance spectroscopy, the postheated scratched coating had shown impedance values close to the nonscratched coating, which indicated that corrosion resistivity was restored. Ce(NO3)3 content at the scratched area was analyzed by focused ion beam–scanning electron microscopy. The scratch width was healed and filled with Ce(NO3)3. Therefore, PCL5Ce is capable of being used as an enhancing additive for the self-healing performance in SME coating.
研究领域:
材料科学
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腐蚀与防护
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表面工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
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2013
·Vol. 66
·期 1
·133-138
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IF 1.66
Peng Shusen,Zhao Wenjie,Zeng Zhixiang,Li He,Xue Qunji,Wu Xuedong
In this report, hybrid silica sol–gel coating was prepared using Ce(NO 3 ) 3 (Sol-Ce) as catalyst. Structure, surface morphology and anticorrosion ability of Sol-Ce solution/coating were studied by infrared spectroscopy (IR), scanning electron microscopy, energy dispersive spectrometer (EDS), potentiodynamic scan (PDS) and electrochemical impedance spectroscopy (EIS). IR results showed that Ce(NO 3 ) 3 had a stronger influence on reactivity of alkoxysilane. EDS results revealed that the fraction of Fe in Sol-Ce coating was significantly lower than regular acid-catalyzed hybrid silica sol–gel coating (Sol-Ac) and Sol-Ac with Ce(NO 3 ) 3 -doped coating (Sol-Ac/Ce). The results of PDS and EIS demonstrated that Sol-Ce coating had better anticorrosion ability than Sol-Ac and Sol-Ac/Ce on carbon steel. The enhanced anticorrosion performance of the Sol-Ce coating might result from the following two reasons: (a) Ce(NO 3 ) 3 as a catalyst could alleviate the negative effects of low pH with using acid catalyst (dissolution of carbon steel) and (b) Ce(NO 3 ) 3 could impede corrosion of carbon steel as corrosion inhibitor.
研究领域:
材料科学
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表面工程
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腐蚀与防护
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无机化学
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电化学
✓ 已验证
DOI
高影响因子
ACS Omega
·
2021
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IF 3.512
Longfei Gao,Huiyuan Luo,Qian Wang,Guirong Hu,Yuzhu Xiong
The hydrogel prepared by graft copolymerization of starch (ST) and acrylamide (AM) is a commonly used absorbent material; however, due to their irregular network structure and a limited number of hydrophilic groups, starch-based hydrogels have poor water absorption and water retention. To overcome this, here, we provide a new preparation method for starch-based hydrogels. Using cerium ammonium nitrate (CAN) as an initiator, the starch–acrylamide–cellulose (CMC)/poly(ethylene glycol) (S-A-M/PEG) superabsorbent hydrogel was prepared by graft copolymerization. The starch–acrylamide–cellulose/poly(ethylene glycol) hydrogel network is constructed through the synergistic effect of hydrogen bonds and chemical bonds. The experimental results showed that the starch–acrylamide–cellulose/poly(ethylene glycol) superabsorbent hydrogel has a complete network structure that does not easily collapse due to its superior mechanical properties. The water swelling rate reached 80.24 times, and it reached 50.61% water retention after 16 days. This hydrogel has excellent water-absorbing and water-retaining properties, biocompatibility, and degradability, making it useful for further studies in medical, agricultural, and other fields.
研究领域:
材料科学
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化学工程
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生物技术
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SURFACE & COATINGS TECHNOLOGY
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2023
·
IF 5.4
Adeel Moid Butt,Yunpeng Wang,Haitao Ma,Hongjie Li
The current research focus is to design a robust micro/nano-structured superhydrophobic epoxy coating to improve the wetting and anti-corrosion behavior of Q355 mild steel in harsh environment and obtain desired properties of self-healing and self-cleaning. Modified attapulgite (APT) and cerium nitrate based high-performance corrosion inhibitor ODA/PDA/APT-Ce 3+ (OPA Ce 3+ ) coatings were synthesized by the addition of dopamine (DA) and octadecylamine (ODA) which resulted in excellent corrosion inhibition by enhancing the corrosion protection performance of metal alloy and improving the water contact angle of the synthesized epoxy based OPA Ce 3+ coating to more than 160°. While wettability and corrosion protection were strongly associated with cerium nitrate and DA content, the surface microstructure of coated steel samples were relevant to attapulgite quantity. Moreover, the OPA Ce 3+ surface coating demonstrated good self-healing properties to counter chemical deterioration in harsh environment after being exposed for several hours to 3.5 wt% sodium chloride, acidic and alkaline solution. It was able to regain its superhydrophobic properties following hot air flow over the coating surface. The OPA Ce 3+ epoxy coatings displayed long-lasting and outstanding self-healing performance in terms of its wettability and electrochemical stability.
研究领域:
材料科学
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腐蚀工程
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表面化学
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涂层技术
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
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2022
·
IF 6.206
Shuaiya Xue,Bingfeng Li,Peng Mu,Jian Li
Magnesium (Mg) and its alloys are susceptible to corrosion, which affects their large-scale applications. The traditional superhydrophobic coatings for corrosion protection of Mg substrates are particularly fragile and easily damaged after prolonged exposure to harsh conditions. Herein, a superhydrophobic ODA/PDA/APT-Ce 3+ (OPA-Ce 3+ ) coating with corrosion inhibition and self-healing properties was proposed to prevent corrosion of Mg alloy via combining the cerium nitrate loaded attapulgite (APT), polydopamine (PDA) and octadecylamine (ODA). Once the OPA-Ce 3+ coating was corroded, the Ce 3+ adsorbed by the APT were released to form insoluble cerium oxide and hydroxides, thereby inhibiting the penetration of the corrosive substance and preventing further occurrence of corrosion. Furthermore, the OPA-Ce 3+ coating exhibited favorable self-healing ability against chemical damage, which could recover its superhydrophobicity under solar exposure after O 2 plasma etching . The impedance modulus (|Z| 0.01 Hz ) of OPA-Ce 3+ coating was about 3 orders of magnitude higher than that of Mg substrate after being exposed to 3.5 wt% NaCl solution for 15 days, showing outstanding long-lasting anticorrosion performance. Moreover, the abrasion resistance and chemical stability of the as-fabricated coating were also excellent. This work is expected to provide a new perspective for preparing cost-effective and durable anticorrosion coating on metal substrates.
研究领域:
材料科学
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腐蚀工程
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表面化学
✓ 已验证
DOI
高影响因子
ACS Applied Optical Materials
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2024
·
IF 0
Jiahao Wu,Jingying Huang,Tonglin Liu,Bareera Raza,Ni Li,Yang Hu,Youkun Tao,Jing Shao
High-temperature reactions serve as the basis of various modern chemical industries. Surface-enhanced Raman spectroscopy (SERS) has demonstrated significant advantages in operando characterization, particularly in the trace analysis of surface species, which is pivotal for functionality. However, its application in high-temperature processes has revealed a notable decline in sensitivity, primarily attributed to the inadequate thermal stability of the SERS amplifier. The simultaneous achievement of high SERS activity, thermal robustness, and substrate adaptability in Raman signal amplifiers stands as a pressing necessity for broadening the scope of SERS to high-temperature operando studies. This study reports a hybrid nanostructure of Au-embedded core–shell nanospheres (Au-ECSNs), which not only achieve a SERS enhancement factor higher than 104 but also exhibit thermal stability up to 600 °C, along with unrestricted substrate generality. Utilizing three-dimensional finite-difference time-domain (3D-FDTD) simulation, the optimal structural parameters of the Au-ECSNs are identified and experimentally verified by Rhodamine 6G analysis, pyridine adsorption, and thermal robustness tests. Furthermore, the feasibility of Au-ECSNs for high-temperature applications is demonstrated by the trace analysis of carbon species and dynamic monitoring of ceria nitrate decomposition under operando conditions. This work presents a potential strategy for in situ SERS analysis of high-temperature processes, particularly focusing on trace detection of surface species or dynamic monitoring of phase transformations, which is of critical importance in surface chemistry, heterogeneous catalysis, and electrochemical energy advancements.
研究领域:
分析化学
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材料科学
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表面化学
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多相催化
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纳米技术
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光谱学
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化学工程
✓ 已验证
DOI
危险品化学品经营许可证（带存储）