Green Chemistry is proud to present the Green Chemistry Emerging Investigators Series, showcasing work being conducted by Emerging Investigators. This collection aims to highlight the excellent research being carried out by researchers in the early stages of their independent career from across the breadth of green chemistry. For more information about this series, click here
Among the contributions to this series is a Tutorial Review entitled Fundamental, technical and environmental overviews of plastic chemical recycling (DOI: 10.1039/D4GC03127J).
Read our interview with the corresponding author Dr Hui Luo below.
How would you set this article in a wider context?
Plastic pollution, resource depletion and climate change are tightly connected challenges. While mechanical recycling remains essential, it cannot deal with all plastic waste streams or maintain material quality indefinitely. Chemical recycling is increasingly seen as a complementary solution, and our article helps position these technologies realistically within broader waste management systems, industrial infrastructure and net-zero ambitions.
What is the motivation behind this work?
As a material scientist and chemical engineer, I got into the research of plastic chemical recycling about 3-4 years ago when developing my own independent research. There was a lot to learn and I noticed different technologies often discussed in isolation or without sufficient sustainability assessment. Through talking with the other co-authors working on different aspects of plastic recycling, we were motivated to bring together fundamental chemistry, process engineering and life-cycle perspectives to provide a balanced, evidence-based guide. Ultimately, the aim was to help researchers, policymakers and industry identify which technologies make sense for which plastics, and under what conditions.
What aspects of this work are you most excited about at the moment, and what do you find most challenging about it?
I’m particularly excited by emerging technologies or processes that can handle mixed or contaminated waste streams more effectively. The biggest challenge chemical recycling faces in regards to mechanical recycling, is how to reduce energy consumption, especially at scale, to allow the process to be profitable and attractive. I think a lot of efforts are putting into addressing this challenge in both academia and industry as we speak.
What is the next step? What work is planned?
The next step is to take all the learnings on board to develop recycling processes that are lower-energy, more contaminant-tolerable, and validating them at larger scales. In my group, we develop a mechanocatalytic process, which utilises mechanical forces and catalysts to depolymerise different plastics into monomers or other value-added chemicals. We aim to develop it into a technology that operates with low temperature at ambient temperature, to minimise energy consumption and maximise the product yields.
Please describe your journey to becoming an independent researcher
I obtained my PhD in 2019 from Queen Mary University of London, working on waste-derived carbon materials for solar hydrogen conversion in Prof. Magda Titirici’s group. I then followed an academic path to work as a postdoctoral research associate at Imperial College London, where I initiated and led the sub-group on electrochemical biomass conversion. In 2022, I decided to see how research can make real-life impact by taking the senior test engineer role in Ceres Power and learned from this short industrial experience about technology translation and scaling-up. Inspired by how innovative technology can reshape industrial sectors, In 2023, I returned academia and started at University of Surrey as a Future Fellow to work on my original and independent research of combining mechanocatalysis and electrocatalysis for plastic recycling, and later been awarded the Royal Academy of Engineering Research Fellow in 2024.
Can you share one piece of career-related advice or wisdom with other early-career scientists?
Try to build both depth and perspective: develop strong technical expertise, but also understand how your work fits into bigger societal and industrial contexts. Also, personal development is equally important to research development, make sure to build your own research vision and the necessary technical/soft skill sets to transit into independence.
Why did you choose to publish in Green Chemistry?
Green Chemistry is always a place to look for sustainable and novel chemical processes ever since I was doing my PhD. Over the years I have also published and peer-reviewed for Green Chemistry, so I am certain the journal’s emphasis on environmental performance, systems thinking and responsible innovation aligns perfectly with the goals of this review and with the broader direction of our research
Meet the author
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Dr Hui Luo received her Ph.D. in Materials Science from the Queen Mary University of London in 2019, before moving to Imperial College London as a Research Associate. She then worked in the green hydrogen industry for a year before taking an independent Surrey Future Fellowship at the University of Surrey in 2023. Her research focuses on developing and up-scaling efficient chemical recycling and electrolysis technologies to convert biomass and plastic wastes into green hydrogen and high-value commodity chemicals, with low energy consumption and minimal carbon footprints. |































Angelo Scopano



