A facile vapor deposition synthesis of g-C3N4/SiO2 nanocomposite with large specific surface area and enhanced photocatalytic activity

2020 ◽  
Vol 196 ◽  
pp. 247-255
Author(s):  
Fang-yan Chen ◽  
Min-keng He ◽  
Yu-bin Tang ◽  
Cheng-yi He ◽  
Ke-ke Shu ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Vapor Deposition ◽  
Large Specific Surface Area

Enhanced photocatalytic activity of a hollow TiO2–Au–TiO2 sandwich structured nanocomposite

RSC Advances ◽  
2016 ◽  
Vol 6 (23) ◽  
pp. 18958-18964 ◽  
Author(s):  
Qianqian Ding ◽  
Yunxia Zhang ◽  
Guozhong Wang ◽  
Hongjian Zhou ◽  
Haimin Zhang
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Large Specific Surface Area

The hollow mesoporous TiO2–Au–TiO2 nanospheres with stability, large specific surface area can enhance visible-light-induced photocatalytic activity.

scholarly journals Construction of SnO2/graphene-like g-C3N4 with enhanced visible light photocatalytic activity

RSC Advances ◽  
2017 ◽  
Vol 7 (57) ◽  
pp. 36101-36111 ◽  
Author(s):  
Haiyan Ji ◽  
Yamin Fan ◽  
Jia Yan ◽  
Yuanguo Xu ◽  
Xiaojie She ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Specific Surface ◽  
Hydrothermal Method ◽  
Surface Area ◽  
Specific Surface Area ◽  
Photocatalytic Performance ◽  
Large Specific Surface Area ◽  
Environmental Friendly ◽  
Visible Light Photocatalytic

2D/2D SnO2/GL-C3N4 photocatalysts with large specific surface area and high coupling heterointerface extent were synthesized by an environmental friendly hydrothermal method, showing excellent photocatalytic performance on RhB degradation.

scholarly journals Nanocomposite Materials Based on Electrochemically Synthesized Graphene Polymers: Molecular Architecture Strategies for Sensor Applications

Chemosensors ◽  
2021 ◽  
Vol 9 (6) ◽  
pp. 149
Author(s):  
André Olean-Oliveira ◽  
Gilberto A. Oliveira Brito ◽  
Celso Xavier Cardoso ◽  
Marcos F. S. Teixeira
Keyword(s):  
Conducting Polymers ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Electrochemical Sensors ◽  
Structural Characteristics ◽  
Low Cost ◽  
Large Specific Surface Area ◽  
Molecular Architecture ◽  
Sensor Applications

The use of graphene and its derivatives in the development of electrochemical sensors has been growing in recent decades. Part of this success is due to the excellent characteristics of such materials, such as good electrical and mechanical properties and a large specific surface area. The formation of composites and nanocomposites with these two materials leads to better sensing performance compared to pure graphene and conductive polymers. The increased large specific surface area of the nanocomposites and the synergistic effect between graphene and conducting polymers is responsible for this interesting result. The most widely used methodologies for the synthesis of these materials are still based on chemical routes. However, electrochemical routes have emerged and are gaining space, affording advantages such as low cost and the promising possibility of modulation of the structural characteristics of composites. As a result, application in sensor devices can lead to increased sensitivity and decreased analysis cost. Thus, this review presents the main aspects for the construction of nanomaterials based on graphene oxide and conducting polymers, as well as the recent efforts made to apply this methodology in the development of sensors and biosensors.

Three-dimensional graphene encapsulated hollow CoSe2-SnSe2 nanoboxes for high performance asymmetric supercapacitors

2022 ◽  
Author(s):  
Kainan Li ◽  
Ke Zheng ◽  
Zhifang Zhang ◽  
Kuan Li ◽  
Ziyao Bian ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Active Sites ◽  
Specific Capacity ◽  
Three Dimensional ◽  
Hollow Structure ◽  
Large Specific Surface Area ◽  
Composite Aerogel

Abstract Construction of metal selenides with a large specific surface area and a hollow structure is one of the effective methods to improve the electrochemical performance of supercapacitors. However, the nano-material easily agglomerates due to the lack of support, resulting in the loss of electrochemical performance. Herein, we successfully design a three-dimensional graphene (3DG) encapsulation-protected hollow nanoboxes (CoSe2-SnSe2) composite aerogel (3DG/CoSe2-SnSe2) via a co-precipitation method coupled with self-assembly route, followed by a high temperature selenidation strategy. The obtained aerogel possesses porous 3DG conductive network, large specific surface area and plenty of reactive active sites. It could be used as a flexible and binder-free electrode after a facile mechanical compression process, which provided a high specific capacitance of 460 F g-1 at 0.5 A g-1, good rate capability of 212.7 F g-1 at 10 A g-1, and excellent cycle stability due to the fast electron/ion transfer and electrolyte diffusion. With the as-prepared 3DG/CoSe2-SnSe2 as positive electrodes and the AC (activated carbon) as negative electrodes, an asymmetric supercapacitor (3DG/CoSe2-SnSe2//AC) was fabricated, which delivered a high specific capacity of 38 F g-1 at 1A g-1 and an energy density of 11.89 W h kg-1 at 749.9 W kg-1, as well as a capacitance retention of 91.1% after 3000 cycles. This work provides a new method for preparing electrode material.

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