Mesoporous titanosilicate/reduced graphene oxide composites: layered structure, high surface-to-volume ratio, doping effect and application in dye removal from water

2012 ◽  
Vol 22 (38) ◽  
pp. 20504 ◽  
Author(s):  
Thuy-Duong Nguyen-Phan ◽  
Eun Woo Shin ◽  
Viet Hung Pham ◽  
Hyukmin Kweon ◽  
Sunwook Kim ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Layered Structure ◽  
Dye Removal ◽  
High Surface ◽  
Volume Ratio ◽  
Doping Effect ◽  
Reduced Graphene ◽  
Oxide Composites

scholarly journals Improving the ammonia sensing of reduced graphene oxide film by using metal nano-materials

2015 ◽  
Vol 18 (3) ◽  
pp. 72-77
Author(s):  
Hoa Tran My Huynh ◽  
Thu Thi Hoang ◽  
Thanh Thi Phuong Nguyen ◽  
Tham Ngoc Nguyen ◽  
Nhung Thi Tuyet Bui ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Gas Adsorption ◽  
Gas Sensing ◽  
High Surface ◽  
Volume Ratio ◽  
Nano Materials ◽  
Gas Sensitivity ◽  
Ammonia Sensing ◽  
Reduced Graphene

Gas sensing is one of the most promising applications for reduced graphene oxide (rGO). High surface-to-volume ratio in conjunction with remaining reactive oxygen functional groups translates into sensitivity to molecular on the rGO surface. The response of the rGO based devices can be further improved by functionalizing its surface with metal nano-materials. In this paper, we report the ammonia (NH3) sensing behavior of rGO based sensors functionalized with nano-structured metal: silver (Ag) or platinum (Pt) or gold (Au) in air at room temperature and atmospheric pressure. The gas response is detected by the monitoring changes in electrical resistance of the rGO/metal hybrids due to NH3 gas adsorption. Compared to bare rGO, significantly improved NH3 sensitivity is observed with the addition of nano-structured metals. These materials are applied to play the small bridges role connecting many graphene islands together to improve electrical conduction of hybrids while maintaining the inherent advantage of rGO for NH3 gas sensitivity.

scholarly journals Synthesis of transition metal sulfide and reduced graphene oxide hybrids as efficient electrocatalysts for oxygen evolution reactions

2018 ◽  
Vol 5 (9) ◽  
pp. 180927 ◽  
Author(s):  
Yu-Rim Hong ◽  
Sungwook Mhin ◽  
Jiseok Kwon ◽  
Won-Sik Han ◽  
Taeseup Song ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Catalytic Activity ◽  
Transition Metal ◽  
Reduced Graphene Oxide ◽  
Oxygen Evolution ◽  
Chemical Interaction ◽  
High Surface ◽  
Metal Sulfide ◽  
Volume Ratio ◽  
Reduced Graphene

The development of electrochemical devices for renewable energy depends to a large extent on fundamental improvements in catalysts for oxygen evolution reactions (OERs). OER activity of transition metal sulfides (TMSs) can be improved by compositing with highly conductive supports possessing a high surface-to-volume ratio, such as reduced graphene oxide (rGO). Herein we report on the relationship between synthetic conditions and the OER catalytic properties of TMSs and rGO (TMS–rGO) hybrids. Starting materials, reaction temperature and reaction time were controlled to synergistically boost the OER catalytic activity of TMS–rGO hybrids. Our results showed that (i) compared with sulfides, hydroxides are favourable as starting materials to produce the desired TMS–rGO hybrid nanostructure and (ii) high reaction temperatures and longer reaction times can increase physico-chemical interaction between TMSs and rGO supports, resulting in highly efficient OER catalytic activity.

Polyacrylonitrile modified partially reduced graphene oxide composites for the extraction of Hg(II) ions from polluted water

2021 ◽  
Vol 56 (13) ◽  
pp. 7982-7999
Author(s):  
Fathi S. Awad ◽  
Khaled M. AbouZied ◽  
Ayyob M. Bakry ◽  
Weam M. Abou El-Maaty ◽  
Ahmad M. El-Wakil ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Polluted Water ◽  
Reduced Graphene ◽  
Partially Reduced Graphene Oxide ◽  
Oxide Composites

Nanodiamond particles/reduced graphene oxide composites as efficient supercapacitor electrodes

Carbon ◽  
2014 ◽  
Vol 68 ◽  
pp. 175-184 ◽  
Author(s):  
Qi Wang ◽  
Nareerat Plylahan ◽  
Manjusha V. Shelke ◽  
Rami Reddy Devarapalli ◽  
Musen Li ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Reduced Graphene ◽  
Oxide Composites

Unusual morphologies of reduced graphene oxide and polyaniline nanofibers-reduced graphene oxide composites for high performance supercapacitor applications

RSC Advances ◽  
2014 ◽  
Vol 4 (43) ◽  
pp. 22551-22560 ◽  
Author(s):  
Rahul S. Diggikar ◽  
Dattatray J. Late ◽  
Bharat B. Kale
Keyword(s):  
Graphene Oxide ◽  
Electrochemical Performance ◽  
Reduced Graphene Oxide ◽  
High Performance ◽  
Polyaniline Nanofibers ◽  
Pani Nanofibers ◽  
Reduced Graphene ◽  
Oxide Composites ◽  
Enhanced Electrochemical Performance ◽  
Supercapacitor Applications

The unique morphologies of reduced graphene oxide (RGO) and RGO–PANI nanofibers (NF) composites have been demonstrated. The enhanced electrochemical performance was observed for honeycomb like RGO–PANI NFs composites.

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