Solar-light responsive efficient H2 evolution using a novel ternary hierarchical SrTiO3/CdS/carbon nanospheres photocatalytic system

Manchala, Saikumar; Gandamalla, Ambedkar; Rao, Vempuluru Navakoteswara; Venkatakrishnan, Shankar Muthukonda; Shanker, Vishnu

doi:10.1007/s40097-021-00411-y

Cited by 15 publications

(6 citation statements)

References 59 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Full spectrum calibration was conducted using the peak at 284.8 eV from the C 1s spectrum. The high-resolution XPS spectra offer a more profound understanding of the chemical bonding within the prepared samples [35,36]. It can be seen from figure S3(c) that the peaks of Sr 3d shift to high energy, indicating that the binding energy of Sr 3d increases after Pd/Ni doping.…”

Section: Metal-induced Enhancement Of Activitymentioning

confidence: 99%

Pd/Ni bimetallic modification of SrTiO₃ for enhancement of photocatalytic water splitting

Bai,

Lei,

Xie

et al. 2023

Nanotechnology

View full text Add to dashboard Cite

This paper investigates the impact of Pd/Ni modification on the photocatalytic hydrogen production performance of SrTiO3 (STO). STO catalysts were synthesized using a hydrothermal method, and Pd/Ni modification was applied on the surface of STO through chemical deposition. Experimental results demonstrate that the hydrogen evolution rate of Pd/Ni-modified STO (Pd/Ni-STO) reaches 2232.14 μmol·g-1·h-1. X-ray absorption fine structure spectroscopy (XAFS) analysis reveals substitutional doping of Ni with Ti and coordination of Pd with surface O. XPS analysis indicates the introduction of oxygen vacancies due to Pd/Ni doping. Density functional theory (DFT) calculations suggest that Ni doping activates neighboring Ti atoms, leading to the formation of bimetallic catalytic sites composed of oxygen vacancies and Ti atoms, greatly enhancing the photocatalytic hydrogen evolution performance. This study not only provides an effective catalyst for photocatalytic applications but also offers insights into the underlying mechanism, which may stimulate the development of metal-doped catalytic materials and have implications for a range of other applications.

show abstract

Section: Metal-induced Enhancement Of Activitymentioning

confidence: 99%

Pd/Ni bimetallic modification of SrTiO₃ for enhancement of photocatalytic water splitting

Bai,

Lei,

Xie

et al. 2023

Nanotechnology

View full text Add to dashboard Cite

show abstract

“…Subsequently, the PTFE reactor was transferred to the oven, and the hydrothermal reaction was carried out at 120 • C for 2 h. After the hydrothermal reaction was over, the carbon fiber composite material was drawn out and rinsed with ethyl alcohol. The fiber samples were dried in the drying oven at 60 • C for 24 h, thus yielding the CF/SrTiO 3 /CdS double-layer core-shell structure heterojunctions [22]. In this process, the above samples with different proportions were respectively labeled as CF/SrTiO 3 /CdS-1, CF/SrTiO 3 /CdS-2, and CF/SrTiO 3 /CdS-3.…”

Section: Preparation Of Cf/srtio 3 /Cds Composite Fibermentioning

confidence: 99%

One-Dimensional CdS/SrTiO3/Carbon Fiber Core–Shell Photocatalysts for Enhanced Photocatalytic Hydrogen Evolution

Niu

Zhang

et al. 2022

Coatings

View full text Add to dashboard Cite

The photocatalytic hydrogen production efficiency of a single SrTiO3 photocatalytic catalyst is often low, which is mainly due to the serious combination of electrons and holes produced by photocatalysis as well as the mismatch of the redox capacity and light absorption range. Construction of semiconductor heterojunctions can solve these problems. CdS has a narrow band gap, which can effectively utilize visible light, and it has a band structure matched with that of SrTiO3. Therefore, CdS is considered as an ideal candidate for constructing heterojunctions with SrTiO3. In this paper, bamboo pulp fibers were used as the substrate, and SrTiO3 was coated on the substrate through the solvothermal process. CF/SrTiO3 rich in oxygen vacancies was formed by high temperature carbonization, and heterojunctions were formed by loading CdS on the surface of the CF/SrTiO3 composite material through the hydrothermal method, thus obtaining one-dimensional CF/SrTiO3/CdS core–shell photocatalysts. The structure and photocatalytic hydrogen production performance of the CF/SrTiO3/CdS core–shell photocatalysts were mainly studied. The photocatalytic hydrogen production experiment showed that the hydrogen production rate of the CF/SrTiO3/CdS-2 sample under the optimized process was as high as 577.39 μmol/g·h, which was about 11 times that of the CF/SrTiO3 sample. In this composite photocatalytic material system, the loading of the CdS nanospheres could enhance the visible light absorption capacity of the composite catalyst, promote the rapid separation and high-speed migration of photocarriers, and significantly improve the photocatalytic activity.

show abstract

“…At present, the CdS in metal sulfide is a strong competitor in hydrogen evolution thanks to the suitable band gap (2.4 eV) and the easily controlled morphology [33][34][35][36]. However, a single CdS semiconductor still does not have a high photocatalytic hydrogen production performance, which is explained by the fast reorganization of electron-hole pairs as well as surface reactions that are too slow to consume charge efficiently [37][38][39]. The cocatalysts can effectively promote the transfer of photogenerated carriers to the surface active sites and increase the reaction rate while restraining the recombination [40,41].…”

Section: Introductionmentioning

confidence: 99%

Hollow Spherical Pd/CdS/NiS with Carrier Spatial Separation for Photocatalytic Hydrogen Generation

et al. 2023

View full text Add to dashboard Cite

Inspired by the unique properties of the three-dimensional hollow nanostructures in the field of photocatalysis, as well as the combination of co-catalyst, porous hollow spherical Pd/CdS/NiS photocatalysts are prepared by stepwise synthesis. The results show that the Schottky junction between Pd and CdS accelerates the transport of photogenerated electrons, while a p-n junction between NiS and CdS traps the photogenerated holes. As co-catalysts, the Pd nanoparticles and the NiS are loaded inside and outside the hollow CdS shell layer, respectively, which combines with the particular characteristic of the hollow structure, resulting in a spatial carrier separation effect. Under the synergy of the dual co-catalyst loading and hollow structure, the Pd/CdS/NiS has favorable stability. Its H2 production under visible light is significantly increased to 3804.6 μmol/g/h, representing 33.4 times more than that of pure CdS. The apparent quantum efficiency is 0.24% at 420 nm. A feasible bridge for the development of efficient photocatalysts is offered by this work.

show abstract

Solar-light responsive efficient H2 evolution using a novel ternary hierarchical SrTiO3/CdS/carbon nanospheres photocatalytic system

Cited by 15 publications

References 59 publications

Pd/Ni bimetallic modification of SrTiO₃ for enhancement of photocatalytic water splitting

Pd/Ni bimetallic modification of SrTiO₃ for enhancement of photocatalytic water splitting

One-Dimensional CdS/SrTiO3/Carbon Fiber Core–Shell Photocatalysts for Enhanced Photocatalytic Hydrogen Evolution

Hollow Spherical Pd/CdS/NiS with Carrier Spatial Separation for Photocatalytic Hydrogen Generation

Contact Info

Product

Resources

About

Solar-light responsive efficient H2 evolution using a novel ternary hierarchical SrTiO3/CdS/carbon nanospheres photocatalytic system

Cited by 15 publications

References 59 publications

Pd/Ni bimetallic modification of SrTiO3 for enhancement of photocatalytic water splitting

Pd/Ni bimetallic modification of SrTiO3 for enhancement of photocatalytic water splitting

One-Dimensional CdS/SrTiO3/Carbon Fiber Core–Shell Photocatalysts for Enhanced Photocatalytic Hydrogen Evolution

Hollow Spherical Pd/CdS/NiS with Carrier Spatial Separation for Photocatalytic Hydrogen Generation

Contact Info

Product

Resources

About

Pd/Ni bimetallic modification of SrTiO₃ for enhancement of photocatalytic water splitting

Pd/Ni bimetallic modification of SrTiO₃ for enhancement of photocatalytic water splitting