Photocatalytic water splitting to hydrogen production of reduced graphene oxide/SiC under visible light

Yang, Jingjing; Zeng, Xiaopeng; Chen, Lijuan; Yuan, Wenxia

doi:10.1063/1.4792695

Cited by 47 publications

(16 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 6(b) shows the high-resolution spectrum of Au 4 f with two pronounced peaks at 83.7 and 87.0 eV, associated with Au 4f 7/2 and Au 4f 5/2 , respectively. This observation is in good agreement with the widely reported XPS spectra of metallic Au° on RGO nanosheets 14,16 . This Au intense peaks indicates that the Au 3+ ions were completely reduced to Au° metallic nanodots on α-Fe 2 O 3 /RGO ternary nanocomposites under sunlight irradiation with chlorophyll.…”

Section: Resultssupporting

confidence: 92%

Sunlight-Induced photochemical synthesis of Au nanodots on α-Fe2O3@Reduced graphene oxide nanocomposite and their enhanced heterogeneous catalytic properties

Bharath

Anwer

Mangalaraja

et al. 2018

Sci Rep

112

View full text Add to dashboard Cite

In this present study, we report the synthesis of Au nanodots on α-Fe2O3@reduced graphene oxide (RGO) based hetero-photocatalytic nanohybrids through a chlorophyll mediated photochemical synthesis. In this process, chlorophyll induces a rapid reduction (30 min) of Au3+ ions to Au° metallic nanodots on α-Fe2O3@RGO surface under sunlight irradiation. The nucleation growth process, photo-induced electron-transfer mechanism and physico-chemical properties of the Au@α-Fe2O3@RGO ternary nanocomposites were systematically studied with various analytical techniques. This novel photochemical synthesis process is a cost-effective, convenient, surfactant-less, and scalable method. Moreover, the prepared ternary nanocomposites enhanced catalytic activity as compared to pure α-Fe2O3 and α-Fe2O3@RGO. The advantages and synergistic effect of Au@α-Fe2O3@RGO exhibit, (i) a broader range of visible-light absorption due to visible light band gap of α-Fe2O3, (ii) lower recombination possibility of photo-generated electrons and holes due to effect of Au and (iii) faster electron transfer due to higher conductivity of RGO. Therefore, the prepared Au@α-Fe2O3@RGO hetero-photocatalytic nanohybrids exhibited a remarkable photocatalytic activity, thus enabling potential active hetero-photocatalyst for industrial and environmental applications.

show abstract

Section: Resultssupporting

confidence: 92%

Sunlight-Induced photochemical synthesis of Au nanodots on α-Fe2O3@Reduced graphene oxide nanocomposite and their enhanced heterogeneous catalytic properties

Bharath

Anwer

Mangalaraja

et al. 2018

Sci Rep

112

View full text Add to dashboard Cite

show abstract

“…Xiang et al56 demonstrated that the photocatalytic H 2 ‐production rate of the RGO/g‐C 3 N 4 composite exceeded that of the pure g‐C 3 N 4 by more than 3.07 times owing to the efficient separation of the photogenerated electron‐hole pairs and the lengthened lifetime of the charge carriers by incorporation of RGO. Yang et al53 presented a RGO/3C‐SiC photocatalyst with a H 2 ‐production rate of 95 μL h −1 , which was 1.3 times larger than that of the pure 3C‐SiC nanoparticles. Lately, Mou et al57 prepared a novel TiSi 2 /RGO composite using RuO 2 as a cocatalyst to produce H 2 from overall splitting of pure water under visible light irradiation.…”

Section: Graphene As An Electron Acceptor and Transportermentioning

confidence: 99%

Graphene‐Based Materials for Hydrogen Generation from Light‐Driven Water Splitting

et al. 2013

View full text Add to dashboard Cite

Hydrogen production from solar water splitting has been considered as an ultimate solution to the energy and environmental issues. Over the past few years, graphene has made great contribution to improving the light-driven hydrogen generation performance. This article provides a comprehensive overview of the recent research progress on graphene-based materials for hydrogen evolution from light-driven water splitting. It begins with a brief introduction of the current status and basic principles of hydrogen generation from solar water splitting, and tailoring properties of graphene for application in this area. Then, the roles of graphene in hydrogen generation reaction, including an electron acceptor and transporter, a cocatalyst, a photocatalyst, and a photosensitizer, are elaborated respectively. After that, the comparison between graphene and other carbon materials in solar water splitting is made. Last, this review is concluded with remarks on some challenges and perspectives in this emerging field.

show abstract

“…To explore the composition of our SiC NSs more thoroughly, Raman spectroscopy was adopted to compare the change of specific peaks of rGO structure. As shown in Figure b, two peaks at 792 and 947 cm −1 can be found in the SiC NSs, which correspond to the formation of SiC . All the samples give peaks at 1337 and 1599 cm −1 , which belong to D band and G band of rGO, respectively.…”

Section: Resultsmentioning

confidence: 85%

A Novel Silicon Carbide Nanosheet for High‐Performance Humidity Sensor

Sun

Wang

2018

Adv Materials Inter

View full text Add to dashboard Cite

Two‐dimensional (2D) structure is a good candidate for fabricating humidity sensors due to its advantages including high surface/volume ratio, abundant active sites, and fast carrier motion rate. Here, an impedance‐type nonoxide humidity sensor based on silicon carbide nanosheets (SiC NSs) is prepared via carbothermal reduction between graphene oxide and silicon powder. The final product, with a high surface area of 90.1 m2 g−1, contains SiC with a thin oxide layer on the surface and some remained reduced graphene oxide. The synthesized SiC NSs exhibit excellent sensing properties such as a high sensitivity to water in ambient atmosphere (16991.1 at 95% relative humidity (RH)), a wide range of RH response (11–95%), short response time (3 s) and recovery time (3 s), and good linear response toward humidity, which are more excellent than the commercial SiC nanowires and most of the nanostructure humidity sensors in literature. The good humidity sensing performance of this sample can be contributed to the advantage of nanosheet structure, the fast electron transfer rate in the SiC semiconductor, and the donor effect of electrons. This report provides a technical guidance on the designing of novel 2D structure nonoxide humidity sensors.

show abstract

Photocatalytic water splitting to hydrogen production of reduced graphene oxide/SiC under visible light

Cited by 47 publications

References 19 publications

Sunlight-Induced photochemical synthesis of Au nanodots on α-Fe2O3@Reduced graphene oxide nanocomposite and their enhanced heterogeneous catalytic properties

Sunlight-Induced photochemical synthesis of Au nanodots on α-Fe2O3@Reduced graphene oxide nanocomposite and their enhanced heterogeneous catalytic properties

Graphene‐Based Materials for Hydrogen Generation from Light‐Driven Water Splitting

A Novel Silicon Carbide Nanosheet for High‐Performance Humidity Sensor

Contact Info

Product

Resources

About