Critical minerals, especially rare earth elements (REEs), are indispensable to modern technologies, including renewable energy systems, electronics, and the defence sector. However, due to their chemical similarities, the separation of individual REEs remains a significant challenge. Conventional extractants often lack the required selectivity, resulting in inefficient and energy-intensive separation processes. CSIRO is a scientific partner in the project and the selected candidate may conduct the hydrometallurgy-related research components of the project at their facilities.
Aim
Phosphorus-based extractants (e.g., phosphine oxides, phosphonates, phosphoramides) and diglycolamides (DGAs) have demonstrated strong affinity for REE ions and offer rich structural flexibility. By strategically introducing steric hindrance and electronic modifications, these ligands can be fine-tuned to enhance selectivity and extraction efficiency. This project aims to explore and develop novel phosphorus- and DGA-based ligands through rational molecular design, synthesis, and evaluation.
Objectives
- Design novel phosphorus- and DGA-based extractants with tailored steric and electronic characteristics.
- Synthesize and characterize these extractants.
- Assess extraction efficiency and selectivity for individual REEs in mixed aqueous systems.
- Investigate synergistic effects and stripping behaviour.
- Establish structure–activity relationships to guide future extractant design.
Significance
This project contributes to the development of next-generation extractants for REE separation—critical for sustainable, energy-efficient resource recovery. The dual approach combining phosphorus and DGA chemistry broadens the chemical design space and strengthens the potential impact on industrial hydrometallurgical processes.
Ideal Candidate
We are looking for a PhD applicant who can work in a multidisciplinary environment and has a background in synthetic chemistry. The applicant must be eligible to enrol in the PhD programs at Curtin University.
This project is open to domestic applicants only.
Internship
Through this project you will also have an internship opportunity. Internships are available through Curtin, or external providers such as APR Intern and iPREP.
Scholarship
If you are identified as the preferred candidate for this project, you may be considered for an RTP scholarship.
Enquires and How to Apply
For enquires about this opportunity contact Dr Alan Payne at Alan.Payne@curtin.edu.au
To formally apply submit an Expression of Interest to Dr Alan Payne during the Central Scholarship round (July 1st – July 31st 2026)