Adv. Energy Mater. 2020, 2001575
Insufficient light absorption and low carrier separation/transfer efficiency constitute two key issues that hinder the development of efficient photocatalytic hydrogen production. Here, multishell ZnS/CoS2 bisulfide microspheres with gradient distribution of Zn based on the heat diffusion theory are designed. The Zn distribution can be adjusted by regulating the heating rate and manipulating the diffusion coefficients of the different elements conforming the multishell photocatalyst. Because of the unique structure, a gradient energy level is created from the core to the exterior of the multishell microspheres, which effectively facilitates the exciton separation and electron transfer. In addition, stronger light absorption and larger specific surface area have been achieved in the multishell ZnS/CoS2 photocatalysts. As a result, the multishell ZnS/CoS2 microspheres with gradient distribution of Zn exhibit a remarkable hydrogen production rate of 8001 µmol g−1 h−1, which is 3.5 times higher than that of the normal multishell ZnS/CoS2 particles with well‐distributed Zn and 11.3 times higher than that of the mixed nonshell ZnS and CoS2 particles. This work demonstrates for the first time that controlling the diffusion rate of the different elements in the semiconductor is an effective route to simultaneously regulate morphology and structure to design highly efficient photocatalysts.
Congratulations Carlos! Well done!
We had a great UK Redox Flow Battery Meeting yesterday, with lots of interesting talks and posters. Kathryn Toghill and the rest of the committee did an amazing job organising the event! I enjoyed listening to so much good research on flow batteries in the UK and abroad. Also, our Gengyu gave his first talk on Solar Flow Cells and got lots of interesting questions from the rest of participants. Well done Gengyu! Looking forward to the next meeting!
Pavel has been awarded a Best Presentation Award at the 2020 Russell Binions Research Symposium taken place online. Congratulations Pavel! Well done! 🙂
Qian has passed today her 30 month viva, which was done online. Well done Qian! Not much longer for your PhD thesis now!
Another Group Meeting held virtually. Nice to see everyone. I hope we can have these face-to-face soon!
Carbon Dots in Solar-to-Hydrogen Conversion
H. Luo, Q. Guo, P. Szilagyi, A. Belen Jorge, M. Titirici, Trends in Chemistry 2020.
Solar hydrogen production from catalytic water splitting is one of the many options available to help generate clean power and alleviate the threatening environmental concerns stemming from the use of fossil fuels. During the past decade, carbon dots (CDs) have shown great potential in their application for solar-driven hydrogen production owing to their exceptional photophysical and electrical properties derived from their sp2/sp3 hybridized core structure and rich surface functionality. In this review, we correlate the structural features of CDs with their optical and electronic properties and evaluate key properties for efficient solar energy-conversion applications with an emphasis on photocatalysis and photoelectrocatalysis, to shed some light on designing high performance CD-based photosystems.
Congratulations to Gengyu who has recently passes his 18 month viva! Well done!
It was great to catch up with some colleagues since maternity leave and lockdown.
Slowly getting back to work a bit after having Macs. Here a picture of our first virtual group meeting.