Selected-control hydrothermal growths of α- and β-PbO crystals and orientated pressure-induced phase transition

Wang, Yonggang; Lin, Xiaohuan; Zhang, Hao; Wen, Ting; Huang, Fuqiang; Li, Guobao; Wang, Yingxia; Liao, Fuhui; Lin, Jianhua

doi:10.1039/c2ce26162f

Cited by 21 publications

(17 citation statements)

References 35 publications

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“…Pb atoms are shown as blue spheres and O atoms in red. The distances of adjacent Pb layers are drawn with lines for contrast [22].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization, Applications, and Toxicity of Lead Oxide Nanoparticles

Bratovčić¹

2020

Lead Chemistry

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Over the past few years, the interest of material scientists for metal and metal oxide nanoparticles (NPs) is increasing dramatically because of their unique physicochemical characteristics such as catalytic activity and optical, electronic, antibacterial, and magnetic properties which depend on their size, shape, and chemical surroundings. Recently, several new routes of synthesis of lead monoxide (PbO) nanoparticles have been used, such as chemical synthesis, calcination, sol-gel pyrolysis, anodic oxidation, solvothermal method, thermal decomposition, chemical deposition, laser ablation, and green methods. Essentially, for the structural characterization of lead oxide nanoparticles, several spectroscopic, microscopic, and thermogravimetric methods of analysis are used. Lead oxide has been widely utilized in batteries, gas sensors, pigments, ceramics, and glass industry. Furthermore, lead oxide nanoparticles are graded as toxic and dangerous for the human health and environment. Therefore, there is an urgent need to develop new approaches and standardized test procedures to study the potential hazardous effect of nanoparticles on the human health and environment. The aim of this chapter is to provide an overview of the recent trends in synthesis of lead oxide nanoparticles, their characterization, possible applications, and toxicity.

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“…Pb atoms are shown as blue spheres and O atoms in red. The distances of adjacent Pb layers are drawn with lines for contrast [22].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization, Applications, and Toxicity of Lead Oxide Nanoparticles

Bratovčić¹

2020

Lead Chemistry

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“…Based on the dimensionality of these materials, among them 2D IO hybrid materials ((R-NH 3 ) 2 MX 4 (where R is organic moiety) exhibit strong excitonic photoluminescence with narrow band width. 23 Among other fabrication techniques electrochemical deposition is a versatile, cost-effective technique which allows changing the properties by slight variation of the deposition parameters without any requirement of further processing or sophisticated environment. [15][16][17] Depending upon the oxidation states lead oxide adopts four forms (PbO, PbO 2 , Pb 2 O 3 and Pb 3 O 4 ).…”

Section: Introductionmentioning

confidence: 99%

“…15 For the fabrication of PbO several fabrication techniques have been used, namely, thermal deposition, 15 laser-assisted deposition, 20 solvothermal route, 21 sonochemical 22 and hydrothermal methods. 23 Among other fabrication techniques electrochemical deposition is a versatile, cost-effective technique which allows changing the properties by slight variation of the deposition parameters without any requirement of further processing or sophisticated environment. 24 Recently, our group has reported straight forward methodology to deposit ((R-NH 3 ) 2 MX 4 type hybrid thin lm from simple three step method).…”

Section: Introductionmentioning

confidence: 99%

Formation of PbO hexagonal nanosheets and their conversion into luminescent inorganic–organic perovskite nanosheets: growth and mechanism

Shakya

Prakash

2015

RSC Adv.

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We report the formation of inorganic-organic (IO) hybrid perovskite (C 6 H 9 C 2 H 4 NH 3 ) 2 PbI 4 hexagonal nanosheets, using anisotropically grown PbO hexagonal nanosheets as a parent material. In place of the conventional chemical synthesis route, the PbO hexagonal nanosheets have been synthesized by the bottom-up electrochemical deposition technique. Conversion of PbO into the desired hybrid material has been achieved by the intercalation of organic moieties into the alternate layers of inorganic networks. These hybrid structures have shown strong room-temperature excitonic emission at 518 nm.An extensive study has been performed to observe the deposition parameters responsible for the growth of a well-defined hexagonal nanosheet. High-resolution transmission electron microscope results confirmed the growth of single crystalline hexagonal nanosheets in (110) plane orientation. Investigation of the surface morphology, further verified the formation of nanosheets with a smooth surface having an average roughness of 2 nm. The study revealed that the anisotropic growth of nanosheets is a result of different growth rates of crystal faces associated with the crystal lattice. ; Tel: +91 11 26591326 † Electronic supplementary information (ESI) available: Fig. S1: cyclic voltammogram of electrolyte solution used for deposition and X-ray diffraction pattern of as-deposited PbO lm. Table S1 shows the percentage of elemental composition of PbO nanosheets given by EDX result. Fig. S2 shows the effect of pH and concentration of precursors in the deposition bath. Fig. S3 shows the growth of hexagonal nanosheets as a result of secondary nucleation on the substrate. Fig. S4 shows the white light confocal microscopic images of PbO hexagonal nanosheets and photoluminescence images of converted inorganic-organic perovskite nanosheets. See

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“…Further, the core level spectrum of 3d, 4f, and 5d have been represented in Figure d–f, respectively. XPS peaks for Pb‐5d 3/2 , Pb‐4f 5/2 , and Pb‐4f 7/2 orbitals have exactly matched with the literature for PbO in contrast to other possible oxides, such as PbO 2 and Pb 3 O 4 . Most often, due to the environmental exposure (e.g., adsorption of O 2 or H 2 O, etc.…”

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confidence: 99%

Alpha Lead Oxide (α‐PbO): A New 2D Material with Visible Light Sensitivity

Kumar

Liu

Ranjan

et al. 2018

Small

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Even though transition metal dichalcogenides (TMDCs) are deemed to be novel photonic and optoelectronic 2D materials, the visible band gap being often limited to monolayer, hampers their potential in niche applications due to fabrication challenges. Uncontrollable defects and degraded functionalities at elevated temperature and under extreme environments further restrict their prospects. To address such limitations, the discovery of a new 2D material, α-PbO is reported. Micromechanical as well as sonochemical exfoliation of 2D atomic sheets of α-PbO are demonstrated and its optical behavior is investigated. Spectroscopic investigations indicate layer dependent band gaps. In particular, even multilayered PbO sheets exhibit visible band gap > 2 eV (direct) which is rare among semiconducting 2D materials. The emission lifetime of multilayer PbO atomic sheets is 7 ns (dim light) as compared to the monolayer which gives 2.5 ns lifetime and an intense light. Density functional theory calculations of layer dependent band structure of α-PbO matches well with experimental results. Experimental findings suggest that PbO atomic sheets exhibit hydrophobic nature, thermal robustness, microwave stability, anti-corrosive behaviour and acid resistance. This new low-cost, abundant and robust 2D material is expected to find many applications in the fields of electronics, optoelectronics, sensors, photocatalysis and energy storage.

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Selected-control hydrothermal growths of α- and β-PbO crystals and orientated pressure-induced phase transition

Abstract: Bulk crystals of a-and b-PbO have been grown selectively by using transition metal ions as additives. The role of orientated pressure in the unexpected b to a phase transition related to the layered structure has been proposed for the first time.CrystEngComm COMMUNICATION

Cited by 21 publications

References 35 publications

Synthesis, Characterization, Applications, and Toxicity of Lead Oxide Nanoparticles

Synthesis, Characterization, Applications, and Toxicity of Lead Oxide Nanoparticles

Formation of PbO hexagonal nanosheets and their conversion into luminescent inorganic–organic perovskite nanosheets: growth and mechanism

Alpha Lead Oxide (α‐PbO): A New 2D Material with Visible Light Sensitivity

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