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Jones BM, Hu H, Alexsandrov A, Smith W, Clark AE, Li X, Orlando TM. Efficient Intermolecular Energy Exchange and Soft Ionization of Water at Nanoplatelet Interfaces. J Phys Chem Lett 2020; 11:10088-10093. [PMID: 33179936 DOI: 10.1021/acs.jpclett.0c02911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
X-ray, energetic photon, and electron irradiation can ionize and electronically excite target atoms and molecules. These excitations undergo complicated relaxation and energy-transfer processes that ultimately determine the manifold system responses to the deposited excess energy. In weakly bound gas- and solution-phase samples, intermolecular Coulomb decay (ICD) and electron-transfer-mediated decay (ETMD) can occur with neighboring atoms or molecules, leading to efficient transfer of the excess energy to the surroundings. In ionic solids such as metal oxides, intra- and interatomic Auger decay produces localized final states that lead to lattice damage and typically the removal of cations from the substrate. The relative importance of Auger-stimulated damage (ASD) versus ICD and ETMD in microsolvated nanoparticle interfaces is not known. Though ASD is generally expected, essentially no lattice damage resulting from the ionization and electronic excitation of microsolvated boehmite (AlOOH) nanoplatelets has been detected. Rather efficient energy transfer and soft ionization of interfacial water molecules has been observed. This is likely a general phenomenon at gas-oxyhydroxide nanoparticle interfaces where the density of states of the ionized chemisorbed species significantly overlaps with the core hole states of the solid.
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Affiliation(s)
| | - Hang Hu
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | | | - William Smith
- Department of Chemistry, Washington State University, Pullman, Washington 99164, United States
| | - Aurora E Clark
- Department of Chemistry, Washington State University, Pullman, Washington 99164, United States
- Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Xiaosong Li
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
- Pacific Northwest National Laboratory, Richland, Washington 99354, United States
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Cui W, Zhang X, Pearce CI, Chen Y, Zhang S, Liu W, Engelhard MH, Kovarik L, Zong M, Zhang H, Walter ED, Zhu Z, Heald SM, Prange MP, De Yoreo JJ, Zheng S, Zhang Y, Clark SB, Li P, Wang Z, Rosso KM. Cr(III) Adsorption by Cluster Formation on Boehmite Nanoplates in Highly Alkaline Solution. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:11043-11055. [PMID: 31442378 DOI: 10.1021/acs.est.9b02693] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The development of advanced functional nanomaterials for selective adsorption in complex chemical environments requires partner studies of binding mechanisms. Motivated by observations of selective Cr(III) adsorption on boehmite nanoplates (γ-AlOOH) in highly caustic multicomponent solutions of nuclear tank waste, here we unravel the adsorption mechanism in molecular detail. We examined Cr(III) adsorption to synthetic boehmite nanoplates in sodium hydroxide solutions up to 3 M, using a combination of X-ray diffraction (XRD), Raman, X-ray photoelectron spectroscopy (XPS), scanning/transmission electron microscopy (S/TEM), electron energy loss spectroscopy (EELS), high-resolution atomic force microscopy (HR-AFM), time-of-fight secondary ion mass spectrometry (ToF-SIMS), Cr K-edge X-ray absorption near edge structure (XANES)/extended X-ray absorption fine structure (EXAFS), and electron paramagnetic resonance (EPR). Adsorption isotherms and kinetics were successfully fit to Langmuir and pseudo-second-order kinetic models, respectively, consistent with monotonic uptake of Cr(OH)4- monomers until saturation coverage of approximately half the aluminum surface site density. High resolution AFM revealed monolayer cluster self-assembly on the (010) basal surfaces with increasing Cr(III) loading, possessing a structural motif similar to guyanaite (β-CrOOH), stabilized by corner-sharing Cr-O-Cr bonds and attached to the surface with edge-sharing Cr-O-Al bonds. The selective uptake appears related to short-range surface templating effects, with bridging metal connections likely enabled by hydroxyl anion ligand exchange reactions at the surface. Such a cluster formation mechanism, which stops short of more laterally extensive heteroepitaxy, could be a metal uptake discrimination mechanism more prevalent than currently recognized.
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Affiliation(s)
- Wenwen Cui
- Physical & Computational Science Directorate , Pacific Northwest National Laboratory , Richland , Washington 99354 , United States
- National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Key Laboratory of Green Process and Engineering , Institute of Process Engineering, Chinese Academy of Sciences , Beijing , 100190 , P. R. China
- University of Chinese Academy of Sciences , Beijing , 100049 , P. R. China
| | - Xin Zhang
- Physical & Computational Science Directorate , Pacific Northwest National Laboratory , Richland , Washington 99354 , United States
| | - Carolyn I Pearce
- Energy & Environment Directorate , Pacific Northwest National Laboratory , Richland , Washington 99354 , United States
| | - Ying Chen
- Physical & Computational Science Directorate , Pacific Northwest National Laboratory , Richland , Washington 99354 , United States
| | - Shuai Zhang
- Physical & Computational Science Directorate , Pacific Northwest National Laboratory , Richland , Washington 99354 , United States
- Department of Materials Science and Engineering , University of Washington , Seattle , Washington 98195 , United States
| | - Wen Liu
- Environmental Molecular Sciences Laboratory , Pacific Northwest National Laboratory , Richland , Washington 99354 , United States
| | - Mark H Engelhard
- Environmental Molecular Sciences Laboratory , Pacific Northwest National Laboratory , Richland , Washington 99354 , United States
| | - Libor Kovarik
- Environmental Molecular Sciences Laboratory , Pacific Northwest National Laboratory , Richland , Washington 99354 , United States
| | - Meirong Zong
- Physical & Computational Science Directorate , Pacific Northwest National Laboratory , Richland , Washington 99354 , United States
- School of Earth Sciences and Engineering , Nanjing University , Nanjing , Jiangsu Province 210023 , P. R. China
| | - Hailin Zhang
- Physical & Computational Science Directorate , Pacific Northwest National Laboratory , Richland , Washington 99354 , United States
- National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Key Laboratory of Green Process and Engineering , Institute of Process Engineering, Chinese Academy of Sciences , Beijing , 100190 , P. R. China
- University of Chinese Academy of Sciences , Beijing , 100049 , P. R. China
| | - Eric D Walter
- Environmental Molecular Sciences Laboratory , Pacific Northwest National Laboratory , Richland , Washington 99354 , United States
| | - Zihua Zhu
- Environmental Molecular Sciences Laboratory , Pacific Northwest National Laboratory , Richland , Washington 99354 , United States
| | - Steve M Heald
- Advanced Photon Source , Argonne National Laboratory , Lemont , Illinois 60439 , United States
| | - Micah P Prange
- Physical & Computational Science Directorate , Pacific Northwest National Laboratory , Richland , Washington 99354 , United States
| | - James J De Yoreo
- Physical & Computational Science Directorate , Pacific Northwest National Laboratory , Richland , Washington 99354 , United States
- Department of Materials Science and Engineering , University of Washington , Seattle , Washington 98195 , United States
| | - Shili Zheng
- National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Key Laboratory of Green Process and Engineering , Institute of Process Engineering, Chinese Academy of Sciences , Beijing , 100190 , P. R. China
| | - Yi Zhang
- National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Key Laboratory of Green Process and Engineering , Institute of Process Engineering, Chinese Academy of Sciences , Beijing , 100190 , P. R. China
| | - Sue B Clark
- Physical & Computational Science Directorate , Pacific Northwest National Laboratory , Richland , Washington 99354 , United States
- Department of Chemistry , Washington State University , Pullman , Washington 99164 , United States
| | - Ping Li
- National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Key Laboratory of Green Process and Engineering , Institute of Process Engineering, Chinese Academy of Sciences , Beijing , 100190 , P. R. China
| | - Zheming Wang
- Physical & Computational Science Directorate , Pacific Northwest National Laboratory , Richland , Washington 99354 , United States
| | - Kevin M Rosso
- Physical & Computational Science Directorate , Pacific Northwest National Laboratory , Richland , Washington 99354 , United States
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