<i>In situ</i>TEM observations of growth mechanisms of PbO nanoparticles from a Sm-doped PMN-PT matrix

Zhang, Shuang; Tian, Xue Lei; Zheng, Ying; Zhang, Yongcheng; Ye, Wanneng

doi:10.1039/d2nr03809a

Cited by 4 publications

(4 citation statements)

References 48 publications

(43 reference statements)

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“…In the BiOCl region, the two crystal planes had lattice spacings of 0.251 and 0.273 nm, corresponding to the (003) and (110) planes, respectively. 28,29 Therefore, the SEM, TEM, and HRTEM results confirmed the successful synthesis of the Bi 5 Ti 3 FeO 15 / BiOCl heterostructure. Figure 2f were obtained at the applied voltage of ±8 V, indicating that Bi 5 Ti 3 FeO 15 /BiOCl (4 h) had good piezoelectricity.…”

Section: Resultsmentioning

confidence: 52%

“…In the Bi 5 Ti 3 FeO 15 region, the crystal plane with a lattice spacing of 0.262 nm belonged to the (024) plane. In the BiOCl region, the two crystal planes had lattice spacings of 0.251 and 0.273 nm, corresponding to the (003) and (110) planes, respectively. , Therefore, the SEM, TEM, and HRTEM results confirmed the successful synthesis of the Bi 5 Ti 3 FeO 15 /BiOCl heterostructure. Figure f displays the piezoelectric property of Bi 5 Ti 3 FeO 15 /BiOCl (4 h) measured with piezoresponse force microscopy (PFM).…”

Section: Resultsmentioning

confidence: 64%

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Boosting Piezocatalytic Activity of Bi₅Ti₃FeO₁₅/BiOCl Heterostructured Nanocomposites for Degrading Multiple Dyes and Antibiotics

Zhu,

Zheng,

et al. 2024

ACS Appl. Nano Mater.

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Constructing a heterostructure is an effective strategy for improving piezocatalytic performance. Here, Bi 5 Ti 3 FeO 15 /BiOCl heterostructured nanocomposites were synthesized to enhance the piezocatalytic performance by the synergy of oxygen vacancy and heterojunction. As expected, the optimized Bi 5 Ti 3 FeO 15 /BiOCl heterostructured nanocomposites exhibited superior piezocatalytic activity toward organic pollutant degradation compared to Bi 5 Ti 3 FeO 15 and BiOCl. Under ultrasound vibration, rhodamine B (RhB) was degraded by 96% in 20 min, and mixed dyes were degraded by 97% within 30 min by Bi 5 Ti 3 FeO 15 /BiOCl, and the degradation efficiencies were higher than numerous reported piezocatalysts. The Bi 5 Ti 3 FeO 15 / BiOCl catalyst also had efficient removal capability for bisphenol A, tetracycline hydrochloride, and phenol. In addition, RhB, bisphenol A, and tetracycline hydrochloride were also efficiently decomposed by Bi 5 Ti 3 FeO 15 /BiOCl under magnetic stirring, indicating that the catalyst had the capability of harvesting low-frequency mechanical energy. The construction of a heterostructure combined the merits of oxygen vacancy and band structure, which enhanced the absorption of dyes, oxygen, and OH − , improved the separation efficiency of carriers, promoted the formation of radicals, and improved the piezocatalytic activity. This study not only shed light on the design of heterostructure piezocatalyst but also demonstrated that by using mechanical energy, Bi 5 Ti 3 FeO 15 /BiOCl proved to be a promising piezocatalyst for degrading organic pollutants in wastewater.

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Section: Resultsmentioning

confidence: 52%

Section: Resultsmentioning

confidence: 64%

Boosting Piezocatalytic Activity of Bi₅Ti₃FeO₁₅/BiOCl Heterostructured Nanocomposites for Degrading Multiple Dyes and Antibiotics

Zhu,

Zheng,

et al. 2024

ACS Appl. Nano Mater.

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“…Sharp diffraction spots indicate that these nanoparticles are single crystalline and well crystallized. Figure f shows the corresponding high-resolution TEM (HRTEM) image, confirming that Fe 2 O 3 nanoparticles are well crystallized. , The lattice spacings of the marked two crystal planes are 0.285 and 0.287 nm, corresponding to (21̅0) and (110) of Fe 2 O 3 , respectively.…”

Section: Results and Discussionmentioning

confidence: 71%

“…Figure 2f shows the corresponding high-resolution TEM (HRTEM) image, confirming that Fe 2 O 3 nanoparticles are well crystallized. 41,42 The lattice spacings of the marked two crystal planes 43,44 In Figure 3c, it is shown that the two peaks at 530.15 and 531.4 eV are lattice oxygen and chemisorbed oxygen, respectively. 45 The tribocatalytic activity of Fe 2 O 3 was first evaluated by the degradation of RhB using magnetic stirring with different speeds using a polytetrafluoroethylene (PTFE) magnetic stirring rod (A-type).…”

Section: Resultsmentioning

confidence: 99%

Tribocatalytic Degradation of Organic Pollutants Using Fe₂O₃ Nanoparticles

Zhu

et al. 2023

ACS Appl. Nano Mater.

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Tribocatalysts possessing advantages of high performance, eco-friendliness, and low cost also without causing secondary pollution are ideally and highly desirable for practical applications but remain challenging. Here, we demonstrate that eco-friendly and low-cost Fe2O3 nanoparticles exhibit superior tribocatalytic performance through harvesting low-frequency mechanical energy. Rhodamine B (RhB) is completely degraded by Fe2O3 nanoparticles within 15 h under low-frequency magnetic stirring, and the catalytic efficiencies are always maintained above 96% during five consecutive cycles. Systematical experimental explorations indicate that the tribocatalytic performance of Fe2O3 can be improved by increasing the stirring speed and friction area, and the tribocatalytic activity is significantly enhanced under ultrasonic vibration. The friction between Fe2O3 nanoparticles and the magnetic rod and Fe2O3 and the glass cup bottom plays key roles in the degradation of RhB, while the friction between Fe2O3 and water also makes a weak contribution. Catalytic mechanism investigations reveal that the friction-generated positive charges directly decompose dyes, but electrons first react with oxygen to generate superoxide (•O2 –) radicals, and then •O2 – participates in the degradation of dyes. This work expands the range of tribocatalysts and demonstrates that Fe2O3 is advantageous for its eco-friendliness, low cost, and high performance, which can act as a tribocatalyst for organic pollutant degradation through mechanical friction.

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High Tribocatalytic Performance of FeOOH Nanorods for Degrading Organic Dyes and Antibiotics

Sun,

Sui,

et al. 2024

Small Methods

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Tribocatalysis is vitally important for electrochemistry, energy conservation, and water treatment. Exploring eco‐friendly and low‐cost tribocatalysts with high performance is crucial for practical applications. Here, the highly efficient tribocatalytic performance of FeOOH nanorods is reported. The factors related to the tribocatalytic activity such as nanorod diameter, surface area, and surface roughness are investigated, and the diameter of the FeOOH nanorods is found to have a significant effect on their tribocatalytic performance. As a result, under ultrasonic excitation, the optimized FeOOH nanorods exhibit superior tribocatalytic degradation toward rhodamine B (RhB), acid orange 7, methylene blue, methyl orange dyes, and their mixture. The RhB and mixed dyes are effectively degraded within 20 min (k = 0.179 min−1) and 35 min (k = 0.089 min−1), respectively, with the FeOOH nanorods showing excellent reusability. Moreover, antibiotics, such as tetracycline hydrochloride, phenol, and bisphenol A are efficiently degraded. Investigation of the catalytic mechanism reveals that the friction‐generated h+ as well as these yielded •OH and •O2− active radicals participate in the catalytic reaction. This work not only shed light on the design of high‐performance tribocatalyst but also demonstrates that by harvesting mechanical energy, the FeOOH nanorods are promising materials for removing organic contaminants in wastewater.

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In situTEM observations of growth mechanisms of PbO nanoparticles from a Sm-doped PMN-PT matrix

Abstract: An excess PbO is usually added in the raw materials to compensate PbO volatilization during high-temperature sintering (1-x)Pb(Mg1/3Nb2/3)O3-xPbTiO3 (PMN-PT) piezoelectric material. However, the detailed growth mechanism of liquid phase and...

Cited by 4 publications

References 48 publications

Boosting Piezocatalytic Activity of Bi₅Ti₃FeO₁₅/BiOCl Heterostructured Nanocomposites for Degrading Multiple Dyes and Antibiotics

Boosting Piezocatalytic Activity of Bi₅Ti₃FeO₁₅/BiOCl Heterostructured Nanocomposites for Degrading Multiple Dyes and Antibiotics

Tribocatalytic Degradation of Organic Pollutants Using Fe₂O₃ Nanoparticles

High Tribocatalytic Performance of FeOOH Nanorods for Degrading Organic Dyes and Antibiotics

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In situTEM observations of growth mechanisms of PbO nanoparticles from a Sm-doped PMN-PT matrix

Abstract: An excess PbO is usually added in the raw materials to compensate PbO volatilization during high-temperature sintering (1-x)Pb(Mg1/3Nb2/3)O3-xPbTiO3 (PMN-PT) piezoelectric material. However, the detailed growth mechanism of liquid phase and...

Cited by 4 publications

References 48 publications

Boosting Piezocatalytic Activity of Bi5Ti3FeO15/BiOCl Heterostructured Nanocomposites for Degrading Multiple Dyes and Antibiotics

Boosting Piezocatalytic Activity of Bi5Ti3FeO15/BiOCl Heterostructured Nanocomposites for Degrading Multiple Dyes and Antibiotics

Tribocatalytic Degradation of Organic Pollutants Using Fe2O3 Nanoparticles

High Tribocatalytic Performance of FeOOH Nanorods for Degrading Organic Dyes and Antibiotics

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Boosting Piezocatalytic Activity of Bi₅Ti₃FeO₁₅/BiOCl Heterostructured Nanocomposites for Degrading Multiple Dyes and Antibiotics

Boosting Piezocatalytic Activity of Bi₅Ti₃FeO₁₅/BiOCl Heterostructured Nanocomposites for Degrading Multiple Dyes and Antibiotics

Tribocatalytic Degradation of Organic Pollutants Using Fe₂O₃ Nanoparticles