COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Wei Gao,Yuyan Wang,Ming Zhong,Huichun Kang,Bitao Su,Ziqiang Lei
Currently, the majority of photocatalytic materials primarily consist of insoluble semiconductors, whereas soluble semiconductor materials have limited applications in photocatalysis. In this study, it is proposed for the first time to use the soluble semiconductor sodium molybdate (Na 2 MoO 4 ) as a sacrificial agent to fabricate a polyacrylic acid/sodium molybdate-Fe 3+ hydrogel photocatalyst (PAA/Na 2 MoO 4 -Fe 3+ ) through polymerization with Fe 3+ ions and acrylic acid (AA) monomer. The hydrogel photocatalyst was thoroughly characterized and the results revealed that the presence of Na 2 MoO 4 in ionic form within the hydrogel significantly enhanced its adsorption capacity for pollutant molecules. Additionally, Fe 3+ ions coordinated with -COOH ( L ) groups on PAA to form [Fe( L ) 6 ] 3+ ions, which acted as active sites of photocatalytic. Moreover, the PAA/Na 2 MoO 4 -Fe 3+ hydrogel exhibited promising potential as a photocatalyst for the remove of dye pollutants (e.g. MB, MG, RhB and MO) from wastewater. Finally, we also explored and analyzed the photocatalytic mechanism of the hydrogel. It is noteworthy to conclude that the hydrogel possesses immense potential for the practical application of photocatalytic techniques in the treatment of dyes wastewater.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
APPLIED CLAY SCIENCE
·
2020
·
IF 4.605
Xuteng Xing,Dan Zhou,Erjun Tang,Shaojie Liu,Xiaomeng Chu,Xiaodong Xu,Yongquan Xu
The natural halloysite nanotubes were used as the nanocontainer to load Na 2 MoO 4 corrosion inhibitor , and the release rate of Na 2 MoO 4 was further controlled by wrapped with the CaMoO 4 end stopper through adding with Ca 2+ . The variable release rates were fulfilled by the formation of CaMoO 4 end stopper with different strength, and the release time can be adjusted from one to dozens of hours. Moreover, the prepared complex corrosion inhibitor is also an acid-responsive smart material, which can quickly release the large amount of corrosion inhibitors under acidic conditions through the decomposition of insoluble CaMoO 4 complex on the surface or end of halloysite. In addition, the epoxy coating mixed with 10 wt% Ca 2+ treated Na 2 MoO 4 loaded halloysite can provide the highest corrosion resistance and sustained release of the corrosion inhibitor to achieve corrosion healing in the coating defects.
研究领域:
材料科学
·
腐蚀与防护
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2018
·
IF 2.829
Xuteng Xing,Jihui Wang,Wenbin Hu,Qiushi Li,Jing Yuan
Halloysite nanotubes (HNTs) are the natural clay mineral with a tubular structure, which can be used as the nanocontainer for loading corrosion inhibitor . In this work, Na 2 MoO 4 was loaded into HNTs (defined as “Na 2 MoO 4 -HNTs”) through vacuum negative pressure method. In order to control the release rate of Na 2 MoO 4 from Na 2 MoO 4 -HNTs, the insoluble CaMoO 4 complex was introduced at the end of tubes through the interaction between Na 2 MoO 4 and Ca 2+ to obtain Ca-Na 2 MoO 4 -HNTs. The surface morphology was investigated by transmission electron microscope (TEM), and the release behavior was determined by UV–vis spectrophotometer . The inhibition behavior of Ca-Na 2 MoO 4 -HNTs for Q235 steel in 3.5% NaCl solution was investigated by electrochemical impedance spectrum techniques. The results show that Ca-Na 2 MoO 4 -HNTs owns insoluble CaMoO 4 complex capping the end of HNTs, and the total loading capacity of Na 2 MoO 4 is about 14.6%. Moreover, the tunable release of Na 2 MoO 4 can be achieved by controlling the strength of the CaMoO 4 complex stoppers at the end of HNTs, and the release time of Na 2 MoO 4 can be prolonged to more than 600 min. Importantly, the release rate of Na 2 MoO 4 will increase sharply in acid solution, owing to the decomposition of CaMoO 4 complex. In addition, Q235 steel in 3.5% NaCl solution + 1.0 g/L Ca-Na 2 MoO 4 -HNTs exhibits higher inhibition efficiency (60.62% at 24 h) than Q235 steel in 3.5% NaCl solution.
研究领域:
材料科学
·
电化学
·
腐蚀与防护
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2023
·Vol. 170
·期 5
·053503
·
IF 3.9
Tao Wu,Jintao Zhang,Yunfei Chen,Yongzheng Jia,Jialiang An,Jianbang Ge,Mingyong Wang
Molybdenum carbides are the promising ceramic materials and catalysts. A new and green method for the controllable preparation of molybdenum carbides was proposed by one-step co-electrolysis of Na2MoO4 and CO2 greenhouse gas in carbonate molten salts. The solubility and decomposition thermodynamics of Na2MoO4 were analyzed. The structure, composition, current efficiency, energy consumption and extraction ratio of molybdenum carbide were effectively regulated by changing the molten salt composition, electrolytic voltage, temperature, and electrolytic time. It was confirmed that MoC, Mo2C or dual-phase MoC-Mo2C can be controllably prepared. Molybdenum carbides may be mainly obtained by the thermal reaction between C from CO2 and Mo from Na2MoO4. Molybdenum carbides prepared at 850 °C and 4.5 V in Na2CO3-K2CO3−32 wt% Li2CO3−15 wt% Na2MoO4 molten salts showed the best electrocatalytic activity for hydrogen evolution reaction. The work provides an innovative and sustainable strategy to prepare molybdenum carbides and utilize CO2.
研究领域:
材料科学
·
催化化学
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Miaoyan Song,Lin Xu,Kemeng Wang,Guohu Chen,Zhaohong Tang,Kaiwen Zhou,Wenwei Wu,Xuehang Wu
O3-type NaNi 1/3 Fe 1/3 Mn 1/3 O 2 (NFM) is considered as a promising cathode material for sodium-ion batteries (SIBs) due to its high theoretical energy density and low production cost. However, the applications of NFM are restricted owing to detrimental interfacial side reactions and phase evolution during cycling. Herein, a three-in-one modification strategy, including Na 2 MoO 4 coating, surface reconstruction from layered to spinel phase, and Mo 6+ doping, is proposed to design NFM. A uniform and tight Na 2 MoO 4 coating layer formed via reactive wetting mechanism can effectively inhibit the unfavorable side reactions between cathode and electrolyte. The formation of nanoscale spinel layer can anchor the interior layered structure, leading to a decrease in volume change during the sodiation/desodiation process. The incorporation of Mo 6+ with a high valence state and strong Mo O bonds into the O3 phase promotes the expansion of transition-metal layer spacing and enhances the structural stability. As a result, tri-modified NFM exhibits superior cycling stability with a capacity retention of 85.20 % after 300 cycles at 100 mA g −1 and rate performance with a discharge capacity of 56.9 mAh/g at 2000 mA g −1 , outperforming those of pristine NFM (61.76 % and 39.4 mAh/g). This synergistic modification approach provides a new avenue to improve the performance of layered-oxide cathode materials for SIBs.
研究领域:
材料科学
·
电化学
·
储能
·
电池技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）