Progress 04/01/20 to 03/31/23
Outputs
Target Audience:The targeted audience reached during this reporting period are: (1) ethnic minorities students recruited for PhD to participate in this project; (2) the University of California Extension Center professionals who works in agricultural nutrient management via seminars and meetings; and (3) undergraduate students in chemistry and environmental engineering programs through curriculum development incorporating findings from this project. Changes/Problems:
Nothing Reported
What opportunities for training and professional development has the project provided?We have trained a total of three PhD students in Chemical and Environmental Engineering, and Chemistry, three undergraduate students, and two postdoc researchers during the course of the project. The trainees held weekly meetings with the PI and co-PI to discuss project progress, career development guidances and mentorship. How have the results been disseminated to communities of interest?We have discussed our research findings with the University of California Extension Centers, which have direct partnership with farms in California. Our team also attended the USDA Grantee Conference in August 2023 to report the project progress. What do you plan to do during the next reporting period to accomplish the goals?
Nothing Reported
Impacts
What was accomplished under these goals?
The project team has achieved all three research goals. Specifically, we have successfully designed a reductive titanium dioxide photocatalyst using different hole-scavenging ligands, including diethylene glycol, triethylene glycol, tetraethylene glycol and glycerol, and identified the best hole-scavenging ligand as diethylene glycol. We then optimized the synthetic procedure including ligand dosage, synthesis temperature to generate the best-performing titanium dioxide with respect to nitrate reductive treatment. Experimental data from the optimized catalyst shows that the majority of the final product is dominated by ammonium ion. This result is very promising in that the titanium dioxide photocatalyst can convert nitrate to ammonia that is better retained by agricultural irrigation. In addition, ammonium ion is a desirable product that can leads to nutrient recovery and better nitrogen management strategy for agricultural practices.
Publications
- Type:
Journal Articles
Status:
Accepted
Year Published:
2023
Citation:
Sanchez, A,; Ye, Z.; Yin, Y.; Liu, H. Photochemical Conversion of Nitrate to Ammonium Ion by a Newly Developed Photo-Reductive Titanium Dioxide Catalyst: Implications on Nitrogen Recovery. Environmental Sciences: Water Research & Technologies. 2023. Accepted.
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Progress 04/01/22 to 03/31/23
Outputs
Target Audience:The targeted audience reached during this reporting period are: (1) ethnic minorities students recruited for PhD to participate in this project; (2) the University of California Extension Center professionals who works in agricultural nutrient management via seminars and meetings; and (3) undergraduate students in chemistry and environmental engineering programs through curriculum development incorporating findings from this project. Changes/Problems:
Nothing Reported
What opportunities for training and professional development has the project provided?We have trained a total of three PhD students in Chemical and Environmental Engineering, and Chemistry. The trainees held weekly meetings with the PI and co-PI to discuss project progress, career development guidances and mentorship. How have the results been disseminated to communities of interest?We have discussed our research findings with the University of California Extension Centers, which have direct partnership with farms in California. Our team also submitted a confernece abstract presentation to the 2023 Ameican Chemical Socitety Fall Meeting. What do you plan to do during the next reporting period to accomplish the goals?The project completes in 2023 on time.
Impacts
What was accomplished under these goals?
During the reporting year of this seed project, the project team has achieved all three research goals. Specifically, we have successfully designed a reductive titanium dioxide photocatalyst using different hole-scavenging ligands, including diethylene glycol, triethylene glycol, tetraethylene glycol and glycerol, and identified the best hole-scavenging ligand as diethylene glycol. We then optimized the synthetic procedure including ligand dosage, synthesis temperature to generate the best-performing titanium dioxide with respect to nitrate reductive treatment. Experimental data from the optimized catalyst shows that the majority of the final product is dominated by ammonium ion. This result is very promising in that the titanium dioxide photocatalyst can convert nitrate to ammonia that is better retained by agricultural irrigation. In addition, ammonium ion is a desirable product that can leads to nutrient recovery and better nitrogen management strategy for agricultural practices.
Publications
- Type:
Journal Articles
Status:
Submitted
Year Published:
2023
Citation:
Andrew Sanchez, Zuyang Ye, Yadong Yin and Haizhou Liu. Photochemical Conversion of Nitrate to Ammonium Ion by a Newly Developed Photo-Reductive Titanium Dioxide Catalyst: Implications on Nitrogen Recovery. Submitted to Environmental Science: Water Research & Technology. 2023
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Progress 04/01/21 to 03/31/22
Outputs
Target Audience:The targeted audience reached during this reporting period are: (1) ethnic minorities students recruited for PhD to participate in this project; (2) the University of California Extension Center professionals who works in agricultural nutrient management via seminars and meetings; and (3) undergraduate students in chemistry and environmental engineering programs through curriculum development incorporating findings from this project. Changes/Problems:Due to COVID-19 effect and limited lab access in the preious year,we request ano-cost extension of one year to finish the second and third research goals. We are making good progress and the extension will allow us to get the mansucripts published and remaining workcompletely. What opportunities for training and professional development has the project provided?We have trained a total of three PhD students in Chemical and Environmental Engineering, and Chemistry, and one postdoc researcher during year two of the project. The trainees held weekly meetings with the PI and co-PI to discuss project progress, career development guidances and mentorship. How have the results been disseminated to communities of interest?We have discussed our research findings with the University of California Extension Centers, which have direct partnership with farms in California. Our team also attended the USDA Grantee Conference in September 2021 to report the project progress. What do you plan to do during the next reporting period to accomplish the goals?We plan to continue the progress to complete the second and third research goals of the project.
Impacts
What was accomplished under these goals?
During the second year of this seed project, the project team has made significant progress towards all three research goals. Specifically, we have successfully designed a reductive titanium dioxide photocatalyst using different hole-scavenging ligands, including diethylene glycol, triethylene glycol, tetraethylene glycol and glycerol, and identified the best hole-scavenging ligand as diethylene glycol. We then optimized the synthetic procedure including ligand dosage, synthesis temperature to generate the best-performing titanium dioxide with respect to nitrate reductive treatment. Our initial plan was to target the final product of nitrate treatment as nitrogen gas. Experimental data from the optimized catalyst shows that the a large fraction of the final product is dominated by ammonium ion. This result is very promising in that the titanium dioxide photocatalyst can convert nitrate to ammonia that is better retained by agricultural irrigation. In addition, ammonium ion is a desirable product that can leads to nutrient recovery and better nitrogen management strategy for agricultural practices. Currently we are applying the catalyst to realistic agricultural drainage water for real-world demonstration. We are preparing a manuscript to be submitted very soon.
Publications
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Progress 04/01/20 to 03/31/21
Outputs
Target Audience:The targeted audience reached during this reporting period are: (1) ethnic minorities students recruited for PhD to participate in this project; (2) the University of California Extension Center professionals who works in agricultural nutrient management via seminars and meetings; and (3) undergraduate students in chemistry and environmental engineering programs through curriculum development incorporating findings from this project. Changes/Problems:
Nothing Reported
What opportunities for training and professional development has the project provided?We have trained a lot of four PhD students in Chemical and Environmental Engineering, and Chemistry, and one postdoc researcher during year one of the project. The trainees held weekly meetings with the PI and co-PI to discuss project progress, career development guidances and mentorship. How have the results been disseminated to communities of interest?We have discussed our research findings with the University of California Extension Centers, which have direct partnership with farms in California. What do you plan to do during the next reporting period to accomplish the goals?We plan to continue the progress to complete the second and third research goal of the project.
Impacts
What was accomplished under these goals?
During the first year of this seed project, the project team has mainly worked on and made significant progress towards the first two research goals. Specifically, we have successfully designed a reductive titanium dioxide photocatalyst using different hole-scavenging ligands, including diethylene glycol, triethylene glycol, tetraethylene glycol and glycerol. We examined the reductive reactivities of different titanium dioxide photocatalysts, and identified diethylene glycol as the optimal hole-scavenging ligand. In addition, we investigated the optimization strategy of additional dopant on the reductive reactivity of the photocatalyst and end product of nitrogen. We examined dopants of lithium, fluoride and barium. Results so far indicated that lithium-doped photocatalyst exhibited the most desirable reactivity towards nitrate removal, and generated ammonia as the major final product, a desirable product that can leads to nutrient recovery and better nitrogen management strategy for agricultural practices.
Publications
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