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solvothermal method synthesized SnS nanoplates composites for electrochemical sensing of toxic ions Hg²⁺ and Pb²⁺

JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2025年第1期22卷 231-242页

作者： Talapatadur, Vijaya Hegde, S. S. Basavaraju, N. Ramesh, K. CMR Inst Technol Dept Phys Bengaluru 560037 Karnataka India Visvesvaraya Technol Univ Belagavi 590018 India Gopalan Coll Engn & Management Dept Phys Bengaluru 560048 Karnataka India East West Inst Technol Dept Phys Bengaluru 560091 Karnataka India Indian Inst Sci Dept Phys Bengaluru 560012 India

Tin sulfide (SnS) semiconductors have become emerging sensor materials for the electrochemical sensing of heavy metals in trace amounts due to their supportive electrochemical properties. This study reports the synthesis, characterization of SnS/rGO composites and sensing of mercury and lead ions in an aqueous solution. SnS/rGO composites with the proper loading of rGO concentration were synthesized using simple solvothermal method and applied for sensing the heavy metals of mercury and lead ions. The synthesized samples were characterized by XRD, FE-SEM, TEM, FTIR and Raman spectroscopy to study the structure and morphology of the samples. Cyclic voltammetry and AC impedance were used to characterize the samples for electrochemical detection of toxic metals Hg and Pb ions. The XRD analysis reveals that the average crystallite of SnS/rGO nanoplates is in the range of 56-67 nm and was confirmed by TEM. FE-SEM analysis reveals the formation of nanoplates on rGO sheets. Raman spectroscopy and FTIR analysis confirm the presence of rGO and the composition of the prepared sample. The electrochemical sensing of SnS and SnS/rGO nanoplates with graphite powder in 0.1 M KOH solution showed good reversibility and was applied for sensing of HgCl2 and PbCl2 with a quick response time of 2 s. The LOD for Hg and Pb ions was found to be 47.3-65.3 ppm, respectively. All the prepared electrodes of SnS and SnS/rGO composites could be effectively supported by the electrochemical sensing response to HM ions in alkali medium.

关键词： SnS nanoplates solvothermal method Cyclic voltammetry AC impedance Electrochemical sensing

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Facile Preparation and Special Optical Properties of Novel Vanadium Oxide Quantum Dots via solvothermal method

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JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE 2025年第10期34卷 8934-8940页

作者： Cheng, Youliang Liao, Yiwen Fang, Changqing Li, Mengyao Cao, Changxue Xian Univ Technol Fac Printing Packaging Engn & Digital Media Techno Xian 710048 Peoples R China

Vanadium oxide quantum dots (VOxQDs) with varying compositions exhibit unique optical properties that can be utilized in fluorescence sensing, bio-imaging, catalyzing, and other applications. It is necessary to regulate optical properties of VOxQDs by exploring proper synthesis route. Herein, a solvothermal method was employed to synthesize VOxQDs with the particle size of 4.3 +/- 0.8 nm, quantum yield of 4.97% and lattice spacing of about 0.184 nm, using vanadium trioxide (V2O3) as the precursor in this work. In addition, as-prepared VOxQDs exhibited extensive UV absorption at 301 nm and contained V3+, V4+and V5+. This mixed valence system resulted in the presence of multiple fluorophores with distinct chemical structures, which generated excitation peaks at both 321 and 341 nm, along with fluorescence emission at both 399 and 423 nm when excited at 341 nm. This special characteristic can be leveraged for the development of multiple fluorescence probes. Therefore, this work provided additional options for the synthesis of VOxQDs with special photoluminescence (PL) properties, which may have potential applications in anti-counterfeiting packaging. Furthermore, specialized excitation wavelengths could activate the emission peaks, and enable rapid identification of product authenticity.

关键词： optical property quantum dots solvothermal method vanadium oxide

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Efficient Preparation and Electrochemical Properties of BiOCl/Graphite by One-step solvothermal method

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Journal of Wuhan University of Technology(Materials Science) 2024年第3期39卷 651-657页

作者：门丽娟 FEI Chi LIU An 陈春钰 ZHOU Jiankang JU Dianchun School of Metallurgy Engineering Jiangsu University of Science and TechnologyZhangjiagang 215600China

We used the surface-pretreated graphite paper(Gp)as a carrier and loaded BiOCl with high selectivity to Cl^(-)on its surface by solvothermal method to form BiOCl@Gp *** morphology,structure,and composition of the materials were characterized by scanning electron microscopy and nitrogen adsorption/desorption,and the results showed that the spherical BiOCl particles were uniformly dispersed on the surface of the Gp,forming a mesoporous BiOCl@Gp composite with a specific surface area of 22.82 m^(2)/g and a pore volume of 0.043 cm3/***,cyclic voltammetry and electrochemical impedance spectroscopy were used to test the electrochemical properties of the composites,and the stability of BiOCl and the high conductivity of Gp were synergistic,the BiOCl@Gp exhibited a specific capacitance of 30.2 F·g^(-1) at a current density of 0.5 A·g^(-1),and the selectivity of the BiOCl@Gp materials for Cl^(-)was significantly higher than that of SO_(4)^(2-),NO_(2)^(-),and HCO_(3)^(-).Therefore,BiOCl@Gp composite electrode materials can be used for the selective adsorption of Cl^(-)in wastewater,in order to achieve efficient wastewater recycling.

关键词： solvothermal method bismuth oxychloride electrochemistry electrode materials

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MXene-derived composite catalyst with micro-holes by a solvothermal method with tiny amount of solvent for high-efficiency catalytic hydrogen production

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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 2024年第PartA期51卷 1161-1169页

作者： Jin, Xinxin Zhang, Bo Dong, Limin Li, Xiao Liu, Dong Hou, Shaokai Zhang, Yingshuang Niu, Hao Zhang, Feng-Ming Harbin Univ Sci & Technol Sch Mat Sci & Chem Engn Harbin 150040 Peoples R China

A strategy is reported here to introduce micro-holes in the two-dimensional layered Ti3C2 by the tiny-solve-thermal method. TiO2 grows situ either in holes and between or on layers of Ti3C2 using this method meanwhile. The special micro-holes morphology on Ti3C2 enhances the specific surface area and increases the channels for oxygen, enabling full oxidation between layers and generating more TiO2 and more in-situ generated Ti3C2-TiO2 interfaces, which is conducive to TiO2 distribution and uniformity and provides more active sites. This hydrothermal method using tiny solvents can also produce porous morphology in other MXene materials (such as NbC), and photocatalysts with the special morphology will have a broader application prospect. Moreover, a fine interface connection between Ti3C2 and the in-situ grown TiO2 and the lower work function of Ti3C2 achieve an efficient electron-hole transfer. The hydrogen production performance of the Ti3C2-TiO2 photocatalyst prepared by this simple hydrothermal method has been greatly improved, which is up to 7.28 mmol/h/g with 3 wt% Pt and is 109 times and 7 times the Ti3C2-TiO2 catalyst with no holes and P25, respectively. (c) 2023 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

关键词： TiO2 solvothermal method Photocatalytic H 2 evolution NbC Micro-hole

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Temperature Effects on the Structural, Morphological, and Magnetic Properties of Iron Oxide Nanoclusters Using solvothermal method

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JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM 2024年第5-7期37卷 905-919页

作者： Rekha, K. Vizhi, R. Ezhil Vellore Inst Technol Ctr Funct Mat Mat Res Lab Vellore 632014 Tamil Nadu India Vellore Inst Technol Sch Adv Sci Dept Phys Vellore 632 014 Tamil Nadu India

The creation of iron oxide nanostructures with complementary functions has emerged as a requirement for more efficient preclinical nanoparticle-mediated biological research. The physical and magnetic properties of nanoparticles for certain applications are determined by the particle morphology and size, which are crucial factors. We present a method for producing magnetite (Fe3O4) nanoclusters of uniform size by a simple and cost-effective solvothermal process, utilising oleic acid (OA) as the coordinating ligand. The nanocluster sizes are altered by manipulating the temperature during the solvothermal process. Three separate sets of Fe3O4 nanoclusters are synthesised and characterised. The X-ray diffraction (XRD) spectrum exhibits a singular phase characterised by a cubic spinel structure. The particle sizes in the nano range were verified by FESEM, and the interplanar spacing measured by TEM is consistent with that determined by XRD. The confirmation of nanocluster formation was achieved through the utilisation of FESEM and AFM images. The rising temperature correlates with the creation of nanoclusters. The rise in reaction temperature resulted in an augmentation of the size of the crystallite, the shape of nanocrystals, and a rise in the value of saturation magnetization. A high Ms from the magnetic property study confirmed that all the synthesised materials are superparamagnetic. The favourable magnetic characteristics and biocompatibility of the synthesised nanoclusters allow them suitable for biomedical applications.

关键词： Iron oxide Nanoclusters Superparamagnetic solvothermal method Biocompatibility

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Synthesis of ultrathin carbon layer-coated LiNiPO 4 nanoparticles by solvothermal method

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CERAMICS INTERNATIONAL 2024年第14期50卷 24995-25004页

作者： Li, Zhiyi Sun, Haili Wei, Wei Liu, Fengxia Xu, Xiaofei Liu, Zhijun Dalian Univ Technol R&D Inst Fluid & Powder Engn Dalian 116024 Peoples R China

The emerging market of high-power lithium -ion batteries (LIBs) highlights the importance of developing highvoltage cathodes. Lithium nickel phosphate (LiNiPO 4 ) with the highest theoretical discharge potential (-5.1V) has attracted increasing attention due to its stable olivine structure. In this study, ultrathin carbon layercoated LiNiPO 4 was synthesized using oleylamine-assisted solvothermal method under different solvothermal times, and the effect of solvothermal time (1h - 18h) on LiNiPO 4 samples is fully investigated. X-ray diffraction (XRD) shows that high-purity LiNiPO 4 materials can be prepared after calcination of the solvothermal product under N 2 , but adding part of H 2 to the calcination atmosphere will lead to the generation of impurities in the target product. As the solvothermal time increases, the product will agglomerate and grow, the particle size will increase, and the morphology will change from nanoparticle to rodlike structure. After the high-temperature calcination step, the oleylamine is completely carbonized, and a conductive carbon layer is successfully coated on the LiNiPO 4 with the thickness of 2 nm. As the solvothermal time increases, the graphitization degree of oleylamine increases after carbonization. The existence of the carbon layer and the increase in the degree of graphitization are beneficial to improving the electrical conductivity and Li -ion diffusion rate of LiNiPO 4 . The initial discharge capacity of LNP@C-12h product prepared with 12 h solvothermal time is 35 mA h g -1 at 0.1 C. Rietveld analysis shows that the anti-site defect concentration of the LNP@C material is 1.07 %, and the proportion increases to 2.83 % after several cycles. This work provides a positive contribution to the synthesis and modification of high-voltage LiNiPO 4 materials and explains the electrochemical performance degradation of LiNiPO 4 from the perspective of increasing the concentration of anti-site defects.

关键词： Lithium-ion batteries Carbon coating Nanoparticles solvothermal method High-voltage

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One-pot synthesis of NiO-MnCo2O4 heterostructure hollow spheres via template-free solvothermal method for high-performance supercapacitors

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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS 2023年第1期669卷

作者： Cheng, Yinfeng Xia, Kedong Li, Huabo Liu, Pengfei Zhao, Zifang Xu, Guangri Wahid, Fazli Wang, Huajie Henan Inst Sci & Technol Sch Chem & Chem Engn Xinxiang Key Lab Optoelect Funct Mat & Devices Xinxiang Key Lab Bioprinting & Precis Med 3D Xinxiang 453003 Peoples R China Hunan Univ Sci & Technol Sch Chem & Chem Engn Xiangtan 411201 Peoples R China Pak Austria Fachhochschule Inst Appl Sci & Technol Sch Biomed Sci & Biotechnol Haripur 22620 Pakistan

Supercapacitors employ transitional metal oxides as pseudocapacitive materials have drawn great attention owing to their prominent energy storage performances, but most of them are concentrate on simplex metal oxides. In this work, we reported a novel electrode material for supercapacitors composed of NiO-MnCo2O4 heterostructure hollow spheres via a facile and one-pot route. The resulting hybrid electrode material demonstrates a high specific capacity of 660 C g- 1 at 1 A g-1. An assembled hybrid supercapacitor based on this unique heterostructure hollow spheres as positive electrode and nitrogen doped hierarchically porous carbon as negative electrode indicates a favorable energy density of 40 Wh kg- 1 at 750 W kg- 1 and long cycling lifespan of nearly 90% capacity retention rate after 5000 cycles. This work not only produces a competitive electrode material for energy storage devices but also offers a feasible strategy for producing complex transitional metal oxides materials with high capacitive performance.

关键词： Supercapacitors solvothermal method NiO-MnCo 2 O 4 Heterostructure Hollow spheres

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Effect of copper precursors on CO oxidation catalyzed by CuO-CeO_(2) prepared by solvothermal method

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Journal of Rare Earths 2023年第12期41卷 1953-1962,I0005页

作者： Wen Jin Yanmin Liu Jun Yu Xiaoming Guo Dongsen Mao School of Chemical and Environmental Engineering Shanghai Institute of TechnologyShanghai201418China

In this paper,the CuO-CeO_(2) catalyst was prepared by a direct solvothermal *** effects of different copper salt precursors(copper nitrate,copper acetate,copper sulfate) on the catalytic performa nce of the prepared catalyst fo r CO oxidation were *** physical and chemical properties of the prepared catalysts were characterized by X-ray diffraction(XRD),Raman spectroscopy,N_(2)physical adsorption,inductively coupled plasma-atomic emission spectrometry(ICP-AES),X-ray photoelectron spectroscopy(XPS),temperature-programmed desorption analysis of CO(CO-TPD),in-situ diffuse reflectance infrared Fourier transform spectroscopy(DRIFTs),and temperature-programmed reduction with H_(2)(H_(2)-TPR).The results show that the CuO-CeO_(2)catalyst prepared with copper acetate as precursor(CC-A) exhibits the best catalytic activity for CO oxidation at low temperatures,with T50and T90values of 62 and 78℃ respectively,which is mainly attributed to its large specific surface area,pore volume,CO adsorption capacity,and large amount and strong reactivity of surface ***,the CuO-CeO_(2) catalyst prepared with copper nitrate as precursor(CC-N) displays better stability and resistance to water or CO_(2) poisoning than CC-A.

关键词： Cuo-CeO_(2) solvothermal method Copper precursor CO oxidation Rare earths

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Study of the Electronic Structure for Te-Doped FeSe Superconductor Prepared by solvothermal method

ACTA PHYSICA POLONICA A

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ACTA PHYSICA POLONICA A 2023年第4期144卷 247-254页

作者： Zhao, H. -H. Jia, X. -Y. Shen, J. -D. Lai, Y. -J. Feng, L. -S. Li, Q. Southeast Univ Sch Phys Nanjing 211189 Peoples R China

The samples of FeSe1-xTex (x = 0, 0.1, 0.2) were successfully prepared by solvothermal method. The results of X-ray diffraction show that the purity of the samples prepared by the solvothermal method is higher than that of the samples prepared by the solid-state reaction and flux method. The superconducting transition temperature (Tc) of FeSe1-xTex for x = 0, 0.1, 0.2 samples is near 9.3 K, 12.4 K, and 13.9 K, respectively, which is a bit higher than that of bulk samples. The electronic structures of these samples are investigated by X-ray photoemission spectroscopy and X-ray absorption spectroscopy. The Fe 2p X-ray photoemission spectroscopy spectra shift to higher binding energy by Te doping due to the increase in hole densities. X-ray photoemission spectroscopy spectra of Se 3d and Te 3d shift to higher binding energy and lower binding energy, respectively, resulting from the charge transfer between Se and Te. It is suggested that the hybridization between Fe 3d and Se 4p is strengthened. Our results imply that the hybridization between Fe 3d and Se 4p probably plays an important role in superconductivity.

关键词： Te-doped FeSe solvothermal method X-ray photoemission spectroscopy (XPS)

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The structure evolution of hollow SiOC ceramic microspheres prepared with solvothermal method

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CERAMICS INTERNATIONAL 2023年第3期49卷 4082-4090页

作者： Xia, Kedong Li, Chuangchuang Zhang, Hui Zhao, Siyu Li, Weichen Han, Fang Li, Yuwei Liu, Xiao Henan Inst Sci & Technol Sch Chem & Chem Engn Xinxiang 453000 Peoples R China

Hollow silicon oxycarbide (SiOC) ceramic microspheres were synthesized through solvothermal process of vinyltriethoxysilane in NaOH solution with subsequent pyrolysis at high temperature. Increasing the synthesis temperature not only reduces the Si-C bond and C content in SiOC ceramics, but also transforms the amorphous SiOC ceramics into cristobalite SiO2 after carbonization. The rearrangement reaction of oxygen-enriched structural units results in the increase of SiO2C2 unit. No phase separation occurs at 1400 degrees C, and SiC nano-crystals are mainly come from the carbothermal reduction reaction of SiO2 with free C. The size change of SiO2 nanograins were further investigated by HF etching. The porous carbon is obtained after removal of SiO2, while HF etching has no effect on the structure of free C. The C content affects the structure evolution of SiOC ceramics significantly. Although the size of SiO2 grows as increase of pyrolysis temperature, the high C content inhibits the crystallization and growth of SiO2 during the pyrolysis process.

关键词： Hollow SiOC ceramics solvothermal method Structure evolution Porous structure HF etching

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