Tin Oxide Nanoparticles Research Articles

Polymer stabilized cholesteric liquid crystals enhanced by functional nanofibers loaded with CuS NPs and ATO NPs for efficient smart windows and advanced infrared camouflage/anti-counterfeiting technologies

The development of multifunctional smart windows with infrared anti-counterfeiting capabilities is a key research priority. However, achieving both high visible light (VIS) transparency and effective near-infrared (NIR) blocking remains a significant challenge. In this study, a multi-field responsive polymer stabilized cholesteric liquid crystal (PSCLC) smart window was successfully prepared. By adjusting the electric field, the smart window enables controlled adjustment of incident VIS and NIR light for temperature control. Optimization of polymerization conditions and nanofiber loading enhanced the bandwidth reflectance from 256 to 507 nm. The smart window employs an optimized drive scheme for coordinated IR modulation via direct current (DC). The copper sulfide (CuS) and antimony tin oxide (ATO) nanoparticles were loaded in the PSCLC system using electrostatic spinning technique. The loading of nanoparticles using nanofibers greatly increased the number of nanoparticles compared to direct doping of nanoparticles. Therefore, the nanofibers loaded with nanoparticles greatly enhanced the infrared shielding ability and electrical response of the system. In addition, the enhancement of nanofibers also improves the thermal and electrical durability of the PSCLC smart window, and the controlled distribution of nanofibers results in a highly flexible and reliable infrared anti-counterfeiting smart window. This research provides the development of multifunctional liquid crystal smart windows with infrared light modulation, camouflage and anti-counterfeiting functions.

Characterization of tin oxide nanoparticles synthesized by discharging the non-thermal plasma jet in liquid and their application as an antibacterial agent

This study reports the synthesis of tin oxide nanoparticles using a non-thermal plasma jet technique. Spectroscopic analysis (OES) of plasma was carried out at atmospheric pressure to measure the plasma parameters used in the synthesis of nanoparticles. SnO2 NPs were synthesized at different durations (3 and 5 min) using a DC-high-voltage power source with a voltage of 13 kV.X-ray diffraction (XRD) showed that SnO2 NPs, prepared in 3 min, are rutile tetragonal polycrystalline and have an average crystallite size of 12.45 nm. Field emission scanning electron (FE-SEM) images also show that the nanoparticles are spherical and homogenous, with an average nanostructure diameter of 22 to 58 nm for both (3 and 5 min) preparation times. UV–Vis spectroscopy showed peaks of surface plasmon resonance around 255–260 nm. The ICP-mass technique was used to evaluate nanoparticle concentrations, which were between 90–100 μg/ml. Zeta potential (ZP) measurements revealed that the particles are relatively stable colloids. The study shows that synthesized nanoparticles have exceptional antibacterial efficacy against Escherichia coli and Staphylococcus aureus bacteria. These nanoparticles are low-cost, scalable, and can be synthesized using gas or liquid phases, enabling the synthesis of a wide range of nanoparticles suitable for various pathogenic bacterial types.

Metal-free heteroatom integrated defect engineering of flexible carbon networks on tin oxide nanoparticles to enhance lithium-ion battery performance

Metal-free heteroatom integrated defect engineering of flexible carbon networks on tin oxide nanoparticles to enhance lithium-ion battery performance

Physical and Mechanical Properties of Polymer Films with Tin Oxide Nanoparticles Obtained in Plasma Discharge under the Effect of Ultrasound

Physical and Mechanical Properties of Polymer Films with Tin Oxide Nanoparticles Obtained in Plasma Discharge under the Effect of Ultrasound

Thermoelectric power factor optimization in hydrothermally synthesized SnO2 nanoparticles by Cu doping

This paper investigates the effect of copper (Cu) doping on the thermoelectric properties of Tin Oxide (SnO2) nanoparticles. The Cu doped samples were prepared with the help of hydrothermal method using different concentration of Cu atoms. Various characterization techniques including X-ray diffraction (XRD), scanning electron microscopy (SEM), Raman spectroscopy, Hall effect and Seebeck measurements are performed to analyze the structural, morphological, electrical and thermoelectric of grown nanomaterials. Based upon the XRD and Raman measurements, it was concluded that the crystal quality of SnO2 samples degraded with increasing the doping concentration of Cu atoms. SEM images reveal that with the increase of Cu concentration, the porosity of the samples decreases, and the distribution of nanoparticle sizes becomes more uniform. The electrical conductivity of the Cu-doped SnO2 nanoparticles increases with increasing the Cu concentration because Cu atoms are supposed to act as donor defects in SnO2 crystal. However, the Seebeck coefficient decreases, indicating a reduced ability to generate a thermoelectric voltage in response to a temperature gradient. The power factor, initially increases with Cu doping, however, beyond an optimal value, the power factor starts to decrease, indicating a saturation or detrimental effect caused by excessive Cu doping.

Tin oxide nanoparticles anchored on ordered mesoporous carbon for efficient acetone sensing

Rationally designed combinations of semiconductor metal oxides (SMO) and carbon materials can lead to the development of sensing materials with excellent gas performance. Herein, SnO2 nanoparticles (NPs) decorated on ordered mesoporous carbon (CMK-3) nanorods were synthetized by solvothermal and high-temperature calcination methods. Various characterization and gas sensing tests indicated that the resulting one-dimensional (1D) self-assembled SnO2@CMK-3 composite had a large specific surface area (88.02 m2/g) and excellent gas sensing performance. Specifically, at optimal working temperature, the as-prepared SnO2@CMK-3 sensor had a high response (122.1), low limit of detection, good linear fitting (R2 = 0.9892), rapid response/recovery time (5/27 s) towards 50 ppm acetone. Meanwhile, by detecting six gases, including acetone, ammonia, formaldehyde, xylene, triethylamine, and ethanol, it was found that the SnO2@CMK-3 sensor showed good selectivity to acetone. The unique nanostructure, large specific surface area, high oxygen vacancy content, and the formation of heterojunctions accounted for the good performance to acetone. These results highlighted the potential application of the SnO2@CMK-3 composite for the detection of acetone gas and presented a promising approach to prepare SMO@carbon composites for VOCs detection.

Biofabrication and Characterisation of Ni‐Doped SnO2 Nanoparticles With Enhanced Cytotoxicity, Antioxidant, Antimicrobial and Photocatalytic Activities

ABSTRACTThe present work focuses on Annona muricata leaf extract–mediated green synthesis of pure and nickel‐doped tin oxide nanoparticles for 3%, 5% and 7% concentrations. The properties of the obtained nanoparticles were investigated through XRD, FTIR, XPS, HRTEM–SAED, SEM–EDX and UV–visible spectroscopy techniques. The XRD pattern reveals all samples have tetragonal structures with high crystallinity. The Sn–O stretching vibration has been confirmed through FTIR spectra. The XPS results demonstrate that Sn0.93Ni0.07O2 nanoparticles have Sn3d, Ni2p and O1s oxidation states. EDX spectra contain Ni, Sn and O elements, which indicate the purity of the samples. UV–visible absorption spectrum shows decreases in optical energy bandgap with increases in nickel dopant concentration. The samples exhibit notable antibacterial activity against P. aeruginosa and S. aureus. Also, Sn0.93Ni0.07O2 nanoparticle has higher antifungal activity against A. niger than against C. albicans. Moreover, SnO2 nanoparticles have considerable antioxidant activity in DPPH scavenging compared to Sn0.93Ni0.07O2 nanoparticles. Furthermore, SnO2 nanoparticles have a better cytotoxic effect for L929 normal fibroblast cell lines with an LD50 value of 146.42 μg/mL. Additionally, the photocatalytic activity of SnO2 and Sn0.93Ni0.07O2 nanoparticles was done against methylene blue dye under direct sunlight irradiation. Overall, environmentally friendly synthetic pure and Ni‐doped SnO2 nanoparticles can be used in wastewater filter technologies as well as in medical aids due to their better cytotoxic, antioxidant and antimicrobial effects.

Optimal Dispersion of Antimony-Doped Tin Oxide (ATO NPs) in Different NMP Solvent Ratios for Maximizing Photovoltaic Efficiency of Carbon-Based Perovskite Solar Cells

This study addresses interface defects in tin oxide (SnO₂) electron transport layers (ETLs) for perovskite solar cells (PSCs) by doping SnO₂ with antimony (12.9% Sb/Sn). Using a diffusion-precipitation method with varying ratios of N-Methyl-2-Pyrrolidone (NMP) and distilled water (DW) as solvents, antimony-doped tin oxide (ATO) nanoparticle layers were formed and deposited on FTO substrates. Structural and compositional analyses (XPS, EDX, and XRD) confirmed successful Sb incorporation, maintaining the SnO₂ lattice with reduced particle size. Higher NMP ratios improved conductivity to 12 S/cm, enhanced charge transport, and raised the bandgap from 3.67 eV to 3.84 eV. Optimal 100% NMP conditions yielded ATO-based ETLs achieving a power conversion efficiency (PCE) of 23.645%, with a fill factor (FF) of 43.681%, open-circuit voltage (VOC) of 1.202 V, and short-circuit current density (JSC) of 23.87 mA/cm2, underscoring the potential of ATO layers for high-performance PSCs.

Study the Effects of Pure Tin Oxide Nanoparticles Doped with Cu, Prepared by the Biosynthesis Method, on Bacterial Activity

في هذه الدراسة ، تم تشويب جسيمات SnO2 النانوية بنسبة 2٪ بالوزن من النحاس بطريقة التخليق الحيوي. تم استخدام المواد الحيوية SnCl2.2H2O و CuCl2.2H2O و ESM كأغشية قشر البيض كمواد خام. تم تلدين العينات عند 550 درجة مئوية لمدة 3 ساعات. تم الحصول على الفعالية البكتيرية ضد سلالات المكورات العنقودية الذهبية سالبة الجرام و S. aureus إيجابية الجرام وتثبيط أعلى لتركيزات المكورات العنقودية الذهبية من E- coli. تم استخدام طريقة MIC لأدنى تركيز مثبط. أظهرت نتائج XRD أن العينات تبلورت ضمن النوع رباعي الزوايا الروتيل وأن متوسط حجم البلورة ل SnO2 النقي و SnO2: Cu كان (24.2 ، 16.6 )نانومتر على التوالي ، كذلك تم اجراء اختبارات SEM و AFM.كشفت دراسات UV-vis التحليل الطيفي للانعكاس عند فجوة الطاقة لـ SnO2 ، و SnO2: Cu 2٪ هو (4.30،4.35) الكترون فولت على التوالي ، وأظهرت نتائج AFM معدل الخشونة للعينات المحضرة حيث كان(6.34،9.13) نانومتر على التوالي. كما تم أجراء فحص ال EDX للعينات المعدة. الهدف من العمل هو إنشاء جزيئات نانوية SnO2 نقية من خلال التخليق الحيوي النشط ودراسة تأثير تعاطي المنشطات ب Cu ودراسة تاثيرها على خواصها التركيبية والبصرية وايضا في كيفية استخدامها كمضاد بكتيري.

Operational energy savings in greenhouses by retrofitting covering plastics with photothermal antimony tin oxide nanocoating

Energy management in greenhouses is crucial as they demand high energy consumption to keep a desirable environment for products. In this study, a novel greenhouse covering coating is introduced based on photothermal plasmonic nanoparticles to reduce energy consumption in greenhouses. Antimony tin oxide nanoparticles were used as plasmonic nanoparticles and were deposited on polyethylene greenhouse coverings. Thermal and optical properties of the antimony tin oxide-coated covering were characterized, and a comprehensive seasonal greenhouse energy analysis was performed to investigate the energy performance of the developed greenhouse covering. The photosynthetically active radiation (PAR) transmittance of the developed covering is 0.746, and the PAR-to-Solar-Transmittance (PST) value increased about 75% by the new covering. Based on the results, developed greenhouse covering with photothermal plasmonic nanoparticles drops greenhouse heating load by 70% and reduces total greenhouse energy consumption up to 49% in very cold climates. Antimony Tin Oxide nanocoating itself increases greenhouse energy saving by 11.4% in comparison with uncoated-double-layer polyethylene covering. Greenhouse energy savings in this study were achieved without any compromise in photosynthetically active radiation (PAR) and crop growth. A greenhouse covering utilization guideline is provided for each climate zone based on the results of this study to optimize the energy use in the greenhouse. This study opens a new window to innovative material applications in greenhouses to make greenhouses more sustainable and energy-efficient.

Biodegradable photocatalytic film based on chia seed mucilage (xylose, glucose, and methyl glucuronic acid polysaccharides) containing barberry extract and SnO2 nanoparticles

In this study, chia seed mucilage (CSM) was extracted and used to prepare biodegradable film. The prepared film was modified with barberry extract (Ex) and tin oxide (SnO2) nanoparticles (NPs). According to the obtained results, barberry extract significantly increased the thickness of the film, while tin oxide nanoparticles affected the thickness very little. Adding nanoparticles to the film decreased both the tensile strength and flexibility of the film. Barberry extract increased the tensile strength and flexibility of the film. Barberry extract and tin oxide nanoparticles decreased the permeability to water vapor in the films. Barberry extract and tin oxide nanoparticles both increased the antioxidant property of the film. The addition of barberry extract and tin oxide nanoparticles significantly increased the antibacterial properties of the film against both Staphylococcus aureus and Escherichia coli bacteria. Physical connections and electrostatic interactions between composite components were confirmed by Fourier transform infrared (FTIR) spectra. The X-ray diffraction (XRD) results showed the positive effect of tin oxide nanoparticles in the formation of the crystal structure of the composite film. Additives of extract and nanoparticle increased the thermal stability of the film. The mucilage film with the highest percentage of tin oxide nanoparticles up to 50 % caused the photocatalytic degradation of methylene blue.

Bio-fabrication of tin oxide (SnO2) nanoparticles Capped with rosmarinic acid in Argument with antimicrobial activity and photocatalytic degradation

This investigation emphasizes the green synthesis and economical method of SnO2-NPs using crude rosmarinic extract via ultrasonic-assisted extraction methodology. The leaf extract acts as an excellent reducing, capping, and stabilizing agent for SnO2 preparation. The morphology, elemental conformation, crystallinity, size and functional groups responsible for surface stabilization and capping of as-synthesized SnO2 nanoparticles, were characterized. UV absorption showed absorption peak of 200 nm with energy band gap of 2.23 eV and the functional groups recorded in the range of 400 to 4000 cm−1 defined SnO2 formation. The crystalline nature was confirmed via XRD, and both the element peaks (Sn and O) are observed through EDX analysis. The irregular spherical shapes of 6–18 nm are evaluated via TEM and SEM. SAED confirmed the nanocrystalline nature. The green synthesized SnO2 nanocomposite demonstrated excellent methylene blue photocatalytic efficiency, and the subsequent potential mechanism was proposed. Utilizing this nanocomposite, nearly 89.79 % of Methylene Blue was removed in 80 mins under direct sunlight, documenting it as an efficient photocatalyst. Furthermore, the nanocomposite demonstrated comparable antimicrobial activity towards Escherichia coli and Klebsiella pneumoniae, illustrating the effectiveness of the nanocomposite. Consequently, the current work explains the significant synthesis of SnO2 nanoparticles and demonstrates their potential photocatalytic and antibacterial properties.

Preparation of interconnected tin oxide nanoparticles on multi-layered MXene for lithium storage anodes

MXenes, a novel class of two-dimensional (2D) materials known for their excellent electronic conductivity and hydrophilicity, have emerged as promising candidates for lithium-ion battery anodes. This study presents a simple wet-chemical method for depositing interconnected SnO2 nanoparticles (NPs) onto MXene sheets. The SnO2 NPs act as both a high-capacity energy source and a spacer to prevent MXene sheets from restacking. The highly conductive MXene facilitates rapid electron and lithium-ion transport and mitigates the volume changes of SnO₂ during the lithiation/delithiation process by confining the SnO₂ NPs between the MXene layers. This composite anode, SnO2@MXene, leverages the high capacity of SnO2 and the structural and mechanical stability MXene provides. The SnO2@MXene anode exhibits superior electrochemical performance, with a high specific capacity of 678 mAh g− 1 at a current rate of 2.0 A g− 1 over 500 cycles, outperforming pristine MXenes and SnO2 nanoparticles.

Photoluminescence properties of SnO2 nanoparticles doped with group VI elements (Cr, Mo, W) synthesized by pulsed laser ablation in liquid

Tin oxide nanoparticles (SnO2 NPs), both pure and doped with Group VI (G6) metal ions (Cr+3, Mo+5, and W+6), were synthesized using pulsed laser ablation in liquid. This study aimed to investigate the effect of G6 doping on the electronic properties of SnO2 NPs, with an emphasis on enhancing their photoluminescence for optoelectronic applications. Transmission electron microscopy revealed well-crystallized samples with diameters of 3–6 nm, indicating quantum-confinement effects. The optical band gap, determined by UV–Vis spectroscopy, was reduced from 5.1 eV (undoped) to 4.9 eV (Cr-doped) due to defect states, while increasing to 5.3 eV and 5.7 eV for Mo- and W-doped SnO2, respectively, due to the Moss-Burstein effect. The photoluminescence spectra exhibited a redshift, with strong red emission around 700 nm, which was up to 90 % more intense than that of the undoped SnO2. This enhancement was attributed to the 2E→4A2 transition and increased defect states.

Fabrication of MnSnO2 intercalated TA-rGO modified sensor for selective electrochemical detection of chloramphenicol in real samples

Chloramphenicol (CAP), a potent antibiotic capable of inhibiting protein synthesis, presents significant challenges related to long-term dosing and its persistent leaching into the environment, raising concerns about environmental contamination and resistance development. To address this issue, we developed a reliable, low-cost, and biocompatible nanocomposite material comprising tannic acid (TA)-reduced graphene oxide (rGO) intercalated into manganese-doped tin oxide nanoparticles (MnSnO₂ NPs). The structural formation and catalytic activity of the MnSnO₂ NPs/TA-rGO nanocomposite were characterized using field emission-scanning electron microscopy (FE-SEM), high-resolution transmission electron microscopy (HR-TEM), X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), and electrochemical techniques. This material exhibits robust interfacial interactions and synergistic effects, resulting in an admirable electrocatalytic reduction response for CAP sensing. The presence of co-interference molecules improved the selectivity performance of the MnSnO2 NPs/TA-rGO-modified glassy carbon electrode. The fabricated exhibited a two linear determination range (0.011–103.43 μmol L−1 and 103.43–1924.16 μmol L−1), with a detection limit (LOD) is 6.7 nmol L−1 and limit of quantification (LOQ) is 12.3 nmol L−1. Furthermore, this sensor demonstrated good sensitivity, admirable reproducibility, repeatability, and storage stability. Finally, the practicability of the fabricated MnSnO2 NPs/TA-rGO glassy carbon electrode sensor was evaluated by analyzing the CAP content in milk, honey, eye drops, biofluids (human serum and urine), and river water, and satisfactory recovery rates of 95.4 %–100.3 % were noted.

Phase-changing NIPAM-AM/ATO hydrogels for thermochromic smart windows with highly adaptive solar modulation

Improving the solar regulation and reducing the response temperature of thermochromic smart windows are pivotal importance for energy-saving buildings. However, these two strategies are challenging to be integrated into one window. Herein, a novel composite hydrogel based on N-isopropylacrylamide (NIPAM) doped with antimony-doped tin oxide (ATO) nanoparticles and acrylamide (AM) was developed for producing a high-performance smart window, which successfully achieved enhanced solar energy regulation and reduced response temperature. This smart window was fabricated by combining a reversible thermoresponsive hydrogel (TAH) that acted as a thermochromic material with a ATO multilayer film that performed as a transparent heater. The as-prepared smart window could modulate solar light over a range from ultraviolet (UV) to infrared (IR) radiation and achieved active responses to high-temperature weather. The smart window showed high luminous transmittance (Tlum, 82.92 %) together with an excellent solar modulation performance (ΔTlum = 73.31 %, ΔTIR = 38.26 %, and ΔTsol = 60.74 %), and a lower critical solution temperature of 32 °C. Even after 120 high- and low-temperature cyclic durability tests, the smart windows still exhibited a high solar modulation capability. In outdoor demonstrations, the as-prepared smart window exhibited a promising temperature regulation ability under strong solar irradiation. Therefore, the present universal modification framework provided some insights for the future design of energy-saving windows.

A Janus Platinum/Tin Oxide Heterostructure for Durable Oxygen Reduction Reaction.

Designing efficient and durable electrocatalysts for oxygen reduction reaction (ORR) is essential for proton exchange membrane fuel cells (PEMFCs). Platinum-based catalysts are considered efficient ORR catalysts due to their high activity. However, the degradation of Pt species leads to poor durability of catalysts, limiting their applications in PEMFCs. Herein, a Janus heterostructure is designed for high durability ORR in acidic media. The Janus heterostructure composes of crystalline platinum and cassiterite tin oxide nanoparticles with carbon support (J-Pt@SnO2/C). Based on the synchrotron fine structure analysis and electrochemical investigation, the crystalline reconstruction and charge redistribution at the interface of Janus structure are revealed. The tightly coupled interface could optimize the valance states of Pt and the adsorption/desorption of oxygenated intermediates. As a result, the J-Pt@SnO2/C catalyst possesses distinguishing long-term stability during the accelerated durability test without obvious degradation after 40000 cycles and keeps the majority of activity after 70000 cycles. Meanwhile, the catalyst exhibits outstanding activity with half-wave potential at 0.905V and a mass activity of 0.355AmgPt -1 (2.7 times higher than Pt/C). The approach of the Janus catalyst paves an avenue for designing highly efficient and stable Pt-based ORR catalyst in the future implementation.

Bottom Contact Engineering for Ambient Fabrication of >25% Durable Perovskite Solar Cells.

The bottom contact in perovskite solar cells (PSCs) is easy to cause deep trap states and severe instability issues, especially under maximum power point tracking (MPPT). In this study, sodium gluconate (SG) is employed to disperse tin oxide (SnO2) nanoparticles (NPs) and regulate the interface contact at the buried interface. The SG-SnO2 electron transfer layer (ETL) enabled the deposition of pinhole-free perovskite films in ambient air and improved interface contact by bridging effect. SG-SnO2 PSCs achieved an impressive power conversion efficiency (PCE) of 25.34% (certified as 25.17%) with a high open-circuit voltage (VOC) exceeding 1.19V. The VOC loss is less than 0.34V relative to the 1.53eV bandgap, and the fill factor (FF) loss is only 2.02% due to the improved contact. The SG-SnO2 PSCs retained around 90% of their initial PCEs after 1000h operation (T90 = 1000h), higher than T80 = 1000h for the control SnO2 PSC. Microstructure analysis revealed that light-induced degradation primarily occurred at the buried holes and grain boundaries and highlighted the importance of bottom-contact engineering.

The Effect of Indium Tin Oxide Nanoparticles (ITO NPs) Incorporated with ZnO NPs based on Structural, Optical and Flexible Dye Sensitized Solar Cells (FDSSCs) Application.

This study aimed to investigate the impact of zinc oxide nanoparticles (ZnO NPs) doped with indium tin oxide nanoparticles (ITO NPs) on polymer-based dye-sensitized solar cells (DSSCs). The ZnO NPs and ITO NPs were synthesized using the sol-gel and co-precipitation methods, respectively. They were then characterized and applied for dye-sensitized solar cells of a polymer-based substrate. Transmission electron microscopic (TEM) analysis revealed the presence of hexagonal structures and small spherical nanoparticles. The mean diameter of the ZnO NPs was found to be 15.22 ± 0.11 nm, while the ZnO NPs doped with ITO NPs (ZnO NPs/ITO NPs) had a mean diameter of 14.54 ± 0.16 nm. The effects of the ITO NPs on the ZnO NPs were evaluated, and it was found that these ITO NPs enhanced the performance of the flexible electrode DSSCs. After the addition of ITO NPs, the power conversion efficiency (PCE) of the ZnO NPs was boosted to be three times higher than that of the ZnO NPs DSSCs without ITO NPs. Similarly, the ultraviolet (UV) band exhibited a red shift, resulting in a lower band gap and reduced charge transfer resistance, which can enhance the PCE of the DSSCs. The polyethylene terephthalate (PET)/indium tin oxide (ITO) (PET/ITO) substrate conductive polymer showed positive outcomes for DSSCs. The PCE value for ZnO NPs was 2.198 ± 0.14%, while for ZnO NPs/ITO NPs, it was 6.680 ± 0.12%. This work achieved remarkable and competitive performance when compared to a solid (indium tin oxides/glass)-based substrate.

Continuous Microreactor‐Based Synthesis of SnO2 Nanoparticles for Sensor Applications

Tin oxide nanoparticles are well‐established materials with a wide range of applications, including optoelectronic devices and solid‐state gas sensors. Conventional synthesis methods of these systems are often based on batch processes. In this study, we compare batch and continuous synthesis methods for tin dioxide nanoparticles using precipitation and sol‐gel processes. For the continuous processes we applied the so called microjet reactor method. The nanoparticles were characterized by TEM, elemental analysis and XRD and exhibited particle sizes of 1.7‐3.0 nm and crystallite sizes of 1.7‐2.3 nm, consisting of tetragonal (P42/mnm) and orthorhombic (Pbcn) phases. We have evaluated different post‐synthesis purification methods to remove impurities such as chlorides and carbon‐hydrogen species. Each purification method exhibited unique advantages and side effects, providing insight into selecting the most appropriate method for specific applications. We also demonstrated the potential of these SnO2 nanoparticles as ethanol gas sensing materials and compared their performance with a commercial sensor.