Abstract N‐graphene quantum dots (N‐GQDs) are prepared using graphite as a carbon source and ammonia as a nitrogen source by a top‐down approach, and further combined with SnO 2 to obtain SnO 2 /N‐GQDs composites by a hydrothermal method. SnO 2 /N‐GQDs composites are analyzed by morphology and structure characterization, and the composites with different N‐GQDs content are further investigated by instantaneous photocurrent response (I‐t), electrochemical impedance (EIS), linear scanning voltammetry (LSV), and Mott‐Schottky curves (MS). SnO 2 /N‐GQDs composites exhibit an obvious increment in photocurrent and a decrement in interface charge transfer impedance. When the addition of N‐GQDs is 1.5wt.%, the I‐t value of SnO 2 /N‐GQDs reaches the optimum of 3.84 × 10 −5 A cm −2 , which is 2.3 times as large as that of SnO 2 . Meantime, the carrier density of SnO 2 /N‐GQDs reaches 2.67 × 10 21 cm −3 , which is 1.5 times as high as that of SnO 2 . The improvement is attributed to the combination of SnO 2 and N‐GQDs, which promotes more charge carriers to be generated and transported under UV irradiation.

Cuiru Zhang

Tao Feng

Yongqin Wang

Yun Lei

Kaiwei Liu

Tianqi Wang

Particle & Particle Systems Characterization

Particle & Particle Systems Characterization is an international, peer-reviewed, interdisciplinary journal focusing on all aspects of particle research. The journal joined the Advanced Materials family of journals in 2013. Particle has an impact factor of 4.194 (2018 Journal Impact Factor, Journal Citation Reports (Clarivate Analytics, 2019)).

Topics covered include the synthesis, characterization, and application of particles in a variety of systems and devices.

Particle covers nanotubes, fullerenes, micelles and alloy clusters, organic and inorganic materials, polymers, quantum dots, 2D materials, proteins, and other molecular biological systems.
Particle Systems include those in biomedicine, catalysis, energy-storage materials, environmental science, micro/nano-electromechanical systems, micro/nano-fluidics, molecular electronics, photonics, sensing, and others.
Characterization methods include microscopy, spectroscopy, electrochemical, diffraction, magnetic, and scattering techniques.

Particle and Particle Systems Characterization is an international, peer-reviewed, interdisciplinary journal that focuses on all aspects of particle research. The journal became part of the Advanced Materials family in 2013. It has an impact factor of 4.194 according to the 2018 Journal Impact Factor (Journal Citation Reports, Clarivate Analytics, 2019).

The topics covered include the synthesis, characterization, and application of particles in various systems and devices.

The journal addresses nanotubes, fullerenes, micelles, alloy clusters, organic and inorganic materials, polymers, quantum dots, 2D materials, proteins, and other molecular biological systems. Particle systems are applied in fields such as biomedicine, catalysis, energy storage materials, environmental science, micro/nano-electromechanical systems, micro/nano-fluidics, molecular electronics, photonics, sensing, and more.

Characterization methods include microscopy, spectroscopy, electrochemical techniques, diffraction, magnetic methods, and scattering techniques.

《Particle and Particle Systems Characterization》是一本国际性、同行评审的跨学科期刊，专注于粒子研究的各个方面。该期刊于2013年加入先进材料系列期刊。根据2018年期刊影响因子（Clarivate Analytics, 2019），其影响因子为4.194。

期刊涵盖的主题包括粒子的合成、表征及其在各种系统和设备中的应用。

《Particle and Particle Systems Characterization》涉及的内容包括纳米管、富勒烯、胶束和合金簇、有机和无机材料、高分子、量子点、二维材料、蛋白质及其他分子生物系统。粒子系统的应用领域包括生物医学、催化、储能材料、环境科学、微/纳米机电系统、微/纳米流体学、分子电子学、光子学、传感等。

表征方法包括显微镜、光谱、 electrochemical、衍射、磁性和散射技术。

Category	Quartile
材料科学	4
材料科学, 物理化学	4
材料科学, 材料科学综合	4
材料科学, 纳米科技	4

Top‐Down Fabrication of N‐GQDs Modified SnO₂ with Improved Photoelectric Characteristics

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Journal Info

Category	Quartile
NANOSCIENCE & NANOTECHNOLOGY	3

Top‐Down Fabrication of N‐GQDs Modified SnO2 with Improved Photoelectric Characteristics

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Journal Info

Top‐Down Fabrication of N‐GQDs Modified SnO₂ with Improved Photoelectric Characteristics