Effect of pH values on the structural, optical and electrical properties of SnO2 nanostructures

Sukriti,; Chand, Prakash

doi:10.1016/j.ijleo.2018.10.203

Cited by 35 publications

(12 citation statements)

References 26 publications

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“…Pertumbuhan SnO 2 dipengaruhi oleh kondisi eksternal seperti reaksi temperatur, konsentrasi reaksi serta pH larutan [16]. Berbagai literatur menunjukkan bahwa pengaruh pH merupakan faktor penting untuk menentukan morfologi SnO 2 .…”

Section: Pendahuluanunclassified

“…Periathai dkk [20] melakukan penelitian mengenai pengaruh pH pada sifat listrik dan mekanisme konduksi nanopartikel SnO 2 . Demikian juga, Sukriti dkk [16] mempelajari pengaruh pH pada sifat struktural, optik dan elektrikal struktur nano SnO 2 dengan menggunakan metode kopresipitasi pada nilai pH 3, 7 dan 11.…”

Section: Pendahuluanunclassified

“…Ratchaga,dkk [24] melaporkan bahwa ukuran partikel mengecil ketika pH larutan meningkat. Demikian juga dengan penelitian Sukriti, dkk [16] yang menyimpulkan bahwa ukuran kristal berbanding terbalik dengan nilai pH untuk struktur nano SnO 2 .…”

Section: Hasil Dan Diskusiunclassified

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Struktur Kristal Dan Morfologi Permukaan – Sintesis Sno2 Menggunakan Metode Sol-Gel

Arini¹,

Lalasari²,

Setiawan³

et al. 2022

JRM

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SnO2 oxide powder was synthesized using the sol-gel method. SnO2 oxide powder was produced using a solution of tin(IV) chloride (SnCl4) and 25% ammonia (NH4(OH)) by annealing the final product for 4 hours at 900 °C. The pH variation was carried out at pH 7 and 9. XRD analysis showed that the structure of SnO2 formed was polycrystalline with a tetragonal crystal structure with crystal planes (110), (101); (200), (111), (210), (211), (220), (002), (310), (112), (301), (202), (321), (400), (222 ), (330) wherein the crystal plane (110) has the predominant structure. The crystal size using the Scherrer formula, varied from 56,204 and 54,936 nm for pH values 7 and 9. The size using HSP analysis, in the (110) plane the values obtained were 561,594 and 543,901Å for pH 7 and 9. The crystal size decreased with increasing pH. Surface morphology was carried out by SEM analysis, obtained grain sizes of 71.5 and 62.32 nm at pH 7 and 9, respectively. The variation in pH mostly affected the size, shape, and morphology of SnO2.

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Section: Pendahuluanunclassified

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Struktur Kristal Dan Morfologi Permukaan – Sintesis Sno2 Menggunakan Metode Sol-Gel

Arini¹,

Lalasari²,

Setiawan³

et al. 2022

JRM

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“…The control of the optical band gap (BG) and the nature and the rate of defects in a transparent oxide semiconductor and transition-metal-doped semiconducting materials are of high interest in optoelectronics, spintronic devices, sensors, transistors, electrode materials, and solar cells . Titanium (TiO 2 ), zinc (ZnO), indium (In 2 O 3 ), and tin (SnO 2 ) binary oxides as n-type oxide semiconductors with a wide band gap have been largely explored as suitable candidates for this vast field of applications.…”

Section: Introductionmentioning

confidence: 99%

“…Among these four oxides, stannic oxide SnO 2 exhibits the highest direct band gap around 3.6 eV, with a refractive index around n = 2 in the visible range . The synthesis route followed by annealing at high temperatures and the average crystallite size of tin dioxide that adopts a rutile-type structure strongly affects the optical band gap. , The occurrence of defects within the crystals, including interstitial tin atoms, oxygen vacancies, or hydroxyl groups, contributes to create various impurity energy levels. Stannic oxides doped with low rates (<5 at.…”

Section: Introductionmentioning

confidence: 99%

Tuning the Cr^IV/Cr^III Valence States in Purple Cr-Doped SnO₂ Nanopowders: The Key Role of Cr^IV Centers and Defects

et al. 2019

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A low content of chromium (≤5 mol %) has been incorporated into a SnO 2 cassiterite by a coprecipitation route in a basic medium, followed by an annealing step under an O 2 flow at T = 800°C and T = 1000°C. Accurate UV−vis and EPR spectroscopy investigations show the coexistence of isolated Cr 4+ and Cr 3+ ions as well as ferromagnetic Cr 4+ −Cr 3+ and antiferromagnetic Cr 3+ −Cr 3+ interactions. The strong purple hue is related to the isolated Cr 4+ ions stabilized in a distorted octahedral site. This is thanks to the second-order Jahn−Teller (SOJT) effect with a crystal field splitting 10Dq value around 2.4 eV, whereas the 10Dq value is around 2 eV for isotropic Cr 3+ ions, partially substituted for Sn 4+ ions in cassiterite. Just after the coprecipitation process, only Cr 3+ species are stabilized in this rutile network with a poor crystallinity. The isolated Cr 4+ content remains high after annealing at 800°C for 2 days especially for the highest Cr rate (2 and 5 mol %), leading to a darker purple color, but unfortunately the Cr 3+ content also increases for a higher Cr concentration. A lighter purple hue can be reached after calcination at a higher temperature (T = 1000°C) for a shorter time (4 h) but with a lower Cr content to avoid Cr clusters. This is due to stabilizing a high content of isolated Cr 4+ species and limiting the Cr 4+ −Cr 3+ ferromagnetic interactions, which are optimal for a 2% Cr content and also cause the color to darken. The key roles of the Cr 4+ rate and the Cr 4+ −Cr 3+ clusters create local defects whose concentration strongly varies with a total Cr content, which have then been demonstrated to strongly influence the optical and magnetic properties.

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Synergistic Performance Boosts of Dopamine‐Derived Carbon Shell Over Bi‐metallic Sulfide: A Promising Advancement for High‐Performance Lithium‐Ion Battery Anodes

Bhattarai,

Le,

Chhetri

et al. 2024

Advanced Science

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A CoMoS composite is synthesized to combine the benefits of cobalt and molybdenum sulfides as an anodic material for advanced lithium‐ion batteries (LIBs). The synthesis is accomplished using a simple two‐step hydrothermal method and the resulting CoMoS nanocomposites are subsequently encapsulated in a carbonized polydopamine shell. The synthesis procedure exploited the self‐polymerization ability of dopamine to create nitrogen‐doped carbon‐coated cobalt molybdenum sulfide, denoted as CoMoS@NC. Notably, the de‐lithiation capacity of CoMoS and CoMoS@NC is 420 and 709 mAh g⁻1, respectively, even after 100 lithiation/de‐lithiation cycles at a current density of 200 mA g⁻1. Furthermore, excellent capacity retention ability is observed for CoMoS@NC as it withstood 600 consecutive lithiation/de‐lithiation cycles with 94% capacity retention. Moreover, a LIB full‐cell assembly incorporating the CoMoS@NC anode and an NMC‐532 cathode is subjected to comprehensive electrochemical and practical tests to evaluate the performance of the anode. In addition, the density functional theory showcases the increased lithium adsorption for CoMoS@NC, supporting the experimental findings. Hence, the use of dopamine as a nitrogen‐doped carbon shell enhanced the performance of the CoMoS nanocomposites in experimental and theoretical tests, positioning the material as a strong candidate for LIB anode.

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Effect of pH values on the structural, optical and electrical properties of SnO2 nanostructures

Cited by 35 publications

References 26 publications

Struktur Kristal Dan Morfologi Permukaan – Sintesis Sno2 Menggunakan Metode Sol-Gel

Struktur Kristal Dan Morfologi Permukaan – Sintesis Sno2 Menggunakan Metode Sol-Gel

Tuning the Cr^IV/Cr^III Valence States in Purple Cr-Doped SnO₂ Nanopowders: The Key Role of Cr^IV Centers and Defects

Synergistic Performance Boosts of Dopamine‐Derived Carbon Shell Over Bi‐metallic Sulfide: A Promising Advancement for High‐Performance Lithium‐Ion Battery Anodes

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Effect of pH values on the structural, optical and electrical properties of SnO2 nanostructures

Cited by 35 publications

References 26 publications

Struktur Kristal Dan Morfologi Permukaan – Sintesis Sno2 Menggunakan Metode Sol-Gel

Struktur Kristal Dan Morfologi Permukaan – Sintesis Sno2 Menggunakan Metode Sol-Gel

Tuning the CrIV/CrIII Valence States in Purple Cr-Doped SnO2 Nanopowders: The Key Role of CrIV Centers and Defects

Synergistic Performance Boosts of Dopamine‐Derived Carbon Shell Over Bi‐metallic Sulfide: A Promising Advancement for High‐Performance Lithium‐Ion Battery Anodes

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Product

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Tuning the Cr^IV/Cr^III Valence States in Purple Cr-Doped SnO₂ Nanopowders: The Key Role of Cr^IV Centers and Defects