{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,25]],"date-time":"2026-08-25T19:08:47Z","timestamp":1787684927855,"version":"build-2784847793"},"reference-count":57,"publisher":"MDPI AG","issue":"13","license":[{"start":{"date-parts":[[2026,6,27]],"date-time":"2026-06-27T00:00:00Z","timestamp":1782518400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Nanomaterials"],"abstract":"<jats:p>Mesoporous silica nanoparticles (MSNs) are promising nanomaterials for many applications, including water remediation, owing to their high surface area, tunable mesoporosity, and modifiable silanol-rich surfaces. However, their conventional synthesis often relies on costly tetraethyl orthosilicate (TEOS), cationic surfactants, organic solvents, and energy-intensive hydrothermal processing. Herein, a facile sustainable room-temperature sol\u2013gel route is reported using inexpensive sodium silicate as the silica source, L-ascorbic acid as a mild biodegradable acid catalyst, and a binary nonionic surfactant system, Triton X-100\/polysorbate 80, as the structure-directing template. The method replaces alkoxysilanes and hazardous cationic templates and eliminates external heating. It enables the production of uniform spherical MSNs with a locally ordered mesoporous structure, high specific surface area up to 551.5 m2 g\u22121, and large pore volume up to 1.98 cm3 g\u22121. The adsorption capability of the optimized MSNs as nano-adsorbents was demonstrated using amoxicillin (AMX) as a model pharmaceutical contaminant. The optimized sample showed maximum AMX uptake at pH 5.0, followed pseudo-second-order kinetics, and fitted the Langmuir isotherm with a monolayer capacity of 91.3 mg g\u22121. In spiked water matrices, the optimized MSNs recovered 88.5% and 84.4% of AMX from tap water spiked at 10 and 50 mg L\u22121, respectively, and 83.5% and 81.0% from synthetic municipal wastewater spiked at the same concentrations, with RSD values below 5%. The adsorbent further retained 94% of its initial capacity after five adsorption\u2013desorption cycles. This work establishes a scalable green route for producing high-quality MSNs and demonstrates the feasibility of the resulting silanol-rich mesoporous nano-adsorbents for pharmaceutical micropollutant removal, while also indicating their potential suitability as carrier platforms for drug-delivery applications.<\/jats:p>","DOI":"10.3390\/nano16130799","type":"journal-article","created":{"date-parts":[[2026,6,30]],"date-time":"2026-06-30T08:26:15Z","timestamp":1782807975000},"page":"799","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Sustainable Room-Temperature Sol\u2013Gel Synthesis of Mesoporous Silica Nanoparticles from Sodium Silicate Using Ascorbic Acid and Nonionic Surfactants for Amoxicillin Removal from Water"],"prefix":"10.3390","volume":"16","author":[{"ORCID":"https:\/\/orcid.org\/0009-0002-5734-4165","authenticated-orcid":false,"given":"Manal A.","family":"Almalki","sequence":"first","affiliation":[{"name":"Chemistry Department, Faculty of Science, Taibah University, Madinah Al-Munawarah 41321, Saudi Arabia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0309-4706","authenticated-orcid":false,"given":"Obaid A.","family":"Alharbi","sequence":"additional","affiliation":[{"name":"Water Management & Treatment Technologies Institute, Sustainability and Environment Sector, King Abdulaziz City for Science and Technology (KACST), Riyadh 12354, Saudi Arabia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8220-4327","authenticated-orcid":false,"given":"Sultan K.","family":"Alharbi","sequence":"additional","affiliation":[{"name":"Chemistry Department, Faculty of Science, Taibah University, Madinah Al-Munawarah 41321, Saudi Arabia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8648-6926","authenticated-orcid":false,"given":"Bandar R.","family":"Alsehli","sequence":"additional","affiliation":[{"name":"Chemistry Department, Faculty of Science, Taibah University, Madinah Al-Munawarah 41321, Saudi Arabia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9341-8080","authenticated-orcid":false,"given":"Khaled","family":"A. Thumayri","sequence":"additional","affiliation":[{"name":"Chemistry Department, Faculty of Science, Taibah University, Madinah Al-Munawarah 41321, Saudi Arabia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Khaled M.","family":"AlMohaimadi","sequence":"additional","affiliation":[{"name":"Ministry of Education, Directorate General of Education, Madinah Al-Munawarah 42314, Saudi Arabia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0007-2697-2608","authenticated-orcid":false,"given":"Yassin","family":"T. H. Mehdar","sequence":"additional","affiliation":[{"name":"Chemistry Department, Faculty of Science, Taibah University, Madinah Al-Munawarah 41321, Saudi Arabia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5319-0141","authenticated-orcid":false,"given":"Awadh O.","family":"AlSuhaimi","sequence":"additional","affiliation":[{"name":"Chemistry Department, Faculty of Science, Taibah University, Madinah Al-Munawarah 41321, Saudi Arabia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9466-1584","authenticated-orcid":false,"given":"Belal H. M.","family":"Hussein","sequence":"additional","affiliation":[{"name":"Chemistry Department, Faculty of Science, Suez Canal University, Ismailia 41522, Egypt"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,6,27]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"162","DOI":"10.1038\/s44160-025-00973-7","article-title":"Nanoemulsion modular assembly for the synthesis of functional mesoporous nanomaterials","volume":"5","author":"Peng","year":"2026","journal-title":"Nat. Synth."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"13706","DOI":"10.1039\/D2RA01587K","article-title":"Recent progress in the applications of silica-based nanoparticles","volume":"12","author":"Nayl","year":"2022","journal-title":"RSC Adv."},{"key":"ref_3","unstructured":"Iler, R.K. (1979). 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