{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,13]],"date-time":"2026-02-13T08:19:57Z","timestamp":1770970797545,"version":"3.50.1"},"reference-count":35,"publisher":"MDPI AG","issue":"4","license":[{"start":{"date-parts":[[2019,2,21]],"date-time":"2019-02-21T00:00:00Z","timestamp":1550707200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["21804078"],"award-info":[{"award-number":["21804078"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100012579","name":"Natural Science Foundation of Qinghai Province","doi-asserted-by":"publisher","award":["2017-ZJ-924Q"],"award-info":[{"award-number":["2017-ZJ-924Q"]}],"id":[{"id":"10.13039\/501100012579","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>The homemade explosive, triacetone triperoxide (TATP), is easy to synthesize, sensitive to detonation but hard to detect directly. Vapor sensor arrays composed of a few sensor materials have the potential to discriminate TATP, but the stability of the sensor array is always a tricky problem since each sensor may encounter a device fault. Thus, a sensor array based on a single optoelectronic TiO2\/PW11 sensor was first constructed by regulating the excitation wavelength to discriminate TATP from other explosives. By in situ doping of Na3PW12O40, a Keggin structure of PW11 formed on the TiO2 to promote the photoinduced electron-hole separation, thus obviously improving the detection sensitivity of the sensor film and shortening the response time. The response of the TiO2\/PW11 sensor film to TATP under 365, 450 and 550 nm illumination is 81%, 42%, and 37%, respectively. The TiO2\/PW11 sensor features selectivity to TATP and is able to detect less than 50 ppb. The flexibility and stability of the flexible sensor film is also demonstrated with the extent of bending. Furthermore, the sensing response cannot be affected by ambient air below 60% relative humidity.<\/jats:p>","DOI":"10.3390\/s19040915","type":"journal-article","created":{"date-parts":[[2019,2,22]],"date-time":"2019-02-22T03:49:44Z","timestamp":1550807384000},"page":"915","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":21,"title":["A Sensor Array Realized by a Single Flexible TiO2\/POMs Film to Contactless Detection of Triacetone Triperoxide"],"prefix":"10.3390","volume":"19","author":[{"given":"Xiaorong","family":"L\u00fc","sequence":"first","affiliation":[{"name":"Qinghai Provincial Key Laboratory of New Light Alloys, Qinghai Provincial Engineering Research Center of High Performance Light Metal Alloys and Forming, Qinghai University, Xining 810016, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Puqi","family":"Hao","sequence":"additional","affiliation":[{"name":"Qinghai Provincial Key Laboratory of New Light Alloys, Qinghai Provincial Engineering Research Center of High Performance Light Metal Alloys and Forming, Qinghai University, Xining 810016, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Guanshun","family":"Xie","sequence":"additional","affiliation":[{"name":"Qinghai Provincial Key Laboratory of New Light Alloys, Qinghai Provincial Engineering Research Center of High Performance Light Metal Alloys and Forming, Qinghai University, Xining 810016, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Junyuan","family":"Duan","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Material Processing and Die &amp; Mould Technology, School of Material Sciences and Engineering, Huazhong University of Science and Technology (HUST), Wuhan 430074, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Li","family":"Gao","sequence":"additional","affiliation":[{"name":"Qinghai Provincial Key Laboratory of New Light Alloys, Qinghai Provincial Engineering Research Center of High Performance Light Metal Alloys and Forming, Qinghai University, Xining 810016, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2529-0123","authenticated-orcid":false,"given":"Bingxin","family":"Liu","sequence":"additional","affiliation":[{"name":"Qinghai Provincial Key Laboratory of New Light Alloys, Qinghai Provincial Engineering Research Center of High Performance Light Metal Alloys and Forming, Qinghai University, Xining 810016, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2019,2,21]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"4578","DOI":"10.1002\/adfm.201600592","article-title":"Contactless and Rapid Discrimination of Improvised Explosives Realized by Mn2+ Doping Tailored ZnS Nanocrystals","volume":"26","author":"Wu","year":"2016","journal-title":"Adv. Funct. Mater."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"304","DOI":"10.1016\/j.talanta.2013.09.057","article-title":"Theoretical and experimental study of sensing triacetone triperoxide (TATP) explosive through nanostructured TiO2 substrate","volume":"118","author":"Ray","year":"2014","journal-title":"Talanta"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"2881","DOI":"10.1002\/anie.201208885","article-title":"Highly Selective Detection of Nitro Explosives by a Luminescent Metal\u2013Organic Framework","volume":"52","author":"Nagarkar","year":"2013","journal-title":"Angew. Chem. Int. Ed."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"6631","DOI":"10.1038\/srep06631","article-title":"On-site Rapid Detection of Trace Non-volatile Inorganic Explosives by Stand-alone Ion Mobility Spectrometry via Acid-enhanced Evaporization","volume":"4","author":"Peng","year":"2014","journal-title":"Sci. Rep."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"23269","DOI":"10.3390\/s141223269","article-title":"Development of a Molecularly Imprinted Polymer-Based Sensor for the Electrochemical Determination of Triacetone Triperoxide (TATP)","volume":"14","author":"Mamo","year":"2014","journal-title":"Sensors"},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"56","DOI":"10.1016\/j.aca.2007.12.003","article-title":"Electrochemical detection of triacetone triperoxide employing the electrocatalytic reaction of iron(II\/III)-ethylenediaminetetraacetate and hydrogen peroxide","volume":"608","author":"Laine","year":"2008","journal-title":"Anal. Chim. Acta"},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"9589","DOI":"10.1021\/acs.analchem.5b01775","article-title":"Determination of Triacetone Triperoxide with a N,N-Dimethyl-p-phenylenediamine Sensor on Nafion Using Fe3O4 Magnetic Nanoparticles","volume":"87","author":"Can","year":"2015","journal-title":"Anal. Chem."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"98","DOI":"10.1016\/j.snb.2017.03.012","article-title":"Determination of hydrogen peroxide and triacetone triperoxide (TATP) with a silver nanoparticles-based turn-on colorimetric sensor","volume":"247","author":"Durmazel","year":"2017","journal-title":"Sens. Actuators B Chem."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"1289","DOI":"10.1002\/pssa.201431882","article-title":"Detection of triacetone triperoxide using temperature cycled metal-oxide semiconductor gas sensors","volume":"212","author":"Warmer","year":"2015","journal-title":"Phys. Status Solidi"},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"4039","DOI":"10.1002\/adfm.201501120","article-title":"A High-Performance Nitro-Explosives Schottky Sensor Boosted by Interface Modulation","volume":"25","author":"Yang","year":"2015","journal-title":"Adv. Funct. Mater."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"5285","DOI":"10.1002\/adfm.201300131","article-title":"Sensory Arrays of Covalently Functionalized Single-Walled Carbon Nanotubes for Explosive Detection","volume":"23","author":"Schnorr","year":"2013","journal-title":"Adv. Funct. Mater."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"224","DOI":"10.1016\/j.snb.2007.02.017","article-title":"Catalytic combustion type hydrogen gas sensor using TiO2 and UV-LED","volume":"125","author":"Han","year":"2007","journal-title":"Sens. Actuators B Chem."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"2011","DOI":"10.1016\/j.solmat.2006.04.007","article-title":"A review on highly ordered, vertically oriented TiO2 nanotube arrays: Fabrication, material properties, and solar energy applications","volume":"90","author":"Mor","year":"2006","journal-title":"Sol. Energy Mater. Sol. Cells"},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"9562","DOI":"10.1021\/acs.jpcc.8b02259","article-title":"Correlation between Photocatalytic Activity and Carrier Lifetime: Acetic Acid on Single-Crystal Surfaces of Anatase and Rutile TiO2","volume":"122","author":"Ozawa","year":"2018","journal-title":"J. Phys. Chem. C"},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"6784","DOI":"10.1021\/cm802282t","article-title":"Synthesis of Coupled Semiconductor by Filling 1D TiO2 Nanotubes with CdS","volume":"20","author":"Banerjee","year":"2008","journal-title":"Chem. Mater."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"8677","DOI":"10.1021\/jp071906v","article-title":"Design of a Highly Efficient Photoelectrolytic Cell for Hydrogen Generation by Water Splitting: Application of TiO2\u2212xCx Nanotubes as a Photoanode and Pt\/TiO2 Nanotubes as a Cathode","volume":"111","author":"Mohapatra","year":"2007","journal-title":"J. Phys. Chem. C"},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"75502","DOI":"10.1088\/0957-4484\/20\/7\/075502","article-title":"The detection of improvised nonmilitary peroxide based explosives using a titania nanotube array sensor","volume":"20","author":"Banerjee","year":"2009","journal-title":"Nanotechnology"},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"1449","DOI":"10.1364\/OL.35.001449","article-title":"Modified optical properties in a samarium doped titania inverse opal","volume":"35","author":"Wang","year":"2010","journal-title":"Opt. Lett."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"305","DOI":"10.1016\/j.apcatb.2017.10.009","article-title":"Operando SERS self-monitoring photocatalytic oxidation of aminophenol on TiO2 semiconductor","volume":"224","author":"Yan","year":"2018","journal-title":"Appl. Catal. B Environ."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"5142","DOI":"10.1039\/C7NJ04433J","article-title":"Vanadium-based polyoxometalate complex as a new and efficient catalyst for phenol hydroxylation under mild conditions","volume":"42","author":"Sharma","year":"2018","journal-title":"New J. Chem."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"77","DOI":"10.1016\/j.inoche.2018.03.015","article-title":"Synthesis and characterization of two benzylarsonate functionalized polyoxomolybdates with catalytic activity for oxidation of benzyl alcohol to benzaldehyde","volume":"91","author":"Zhang","year":"2018","journal-title":"Inorg. Chem. Commun."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"49","DOI":"10.1016\/j.jcis.2017.12.019","article-title":"Heteropolytungstate-decorated core-shell magnetic nanoparticles: A covalent strategy for polyoxometalate-based hybrid nanomaterials","volume":"514","author":"Makrygenni","year":"2018","journal-title":"J. Colloid Interface Sci."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"4109","DOI":"10.1021\/acs.inorgchem.8b00282","article-title":"Polyoxometalate-Based Metal\u2013Organic Frameworks for Selective Oxidation of Aryl Alkenes to Aldehydes","volume":"57","author":"Ma","year":"2018","journal-title":"Inorg. Chem."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"18657","DOI":"10.1021\/acsami.8b03071","article-title":"3D-Structured Polyoxometalate Microcrystals with Enhanced Rate Capability and Cycle Stability for Lithium-Ion Storage","volume":"10","author":"Sun","year":"2018","journal-title":"ACS Appl. Mater. Interfaces"},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"13363","DOI":"10.1021\/ja201165c","article-title":"Polyoxometalate-Based Metal Organic Frameworks (POMOFs): Structural Trends, Energetics, and High Electrocatalytic Efficiency for Hydrogen Evolution Reaction","volume":"133","author":"Nohra","year":"2011","journal-title":"J. Am. Chem. Soc."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"122","DOI":"10.1016\/j.snb.2009.04.045","article-title":"Detection of triacetone triperoxide (TATP) with an array of sensors based on non-specific interactions","volume":"140","author":"Capua","year":"2009","journal-title":"Sens. Actuators B Chem."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"12593","DOI":"10.1002\/ange.201501941","article-title":"Polyoxometalate Complexes of Anatase-Titanium Dioxide Cores in Water","volume":"127","author":"Raula","year":"2015","journal-title":"Angew. Chem."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"1754","DOI":"10.1002\/ejic.201201290","article-title":"Monomer and Dimer of Mono-titanium(IV)-Containing \u03b1-Keggin Polyoxometalates: Synthesis, Molecular Structures, and pH-Dependent Monomer\u2013Dimer Interconversion in Solution","volume":"2013","author":"Yusuke","year":"2013","journal-title":"Eur. J. Inorg. Chem."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"2526","DOI":"10.1021\/acs.iecr.7b04480","article-title":"Influence of Nanoparticles Size on XRD Patterns for Small Monodisperse Nanoparticles of Cu0 and TiO2 Anatase","volume":"57","author":"Vorontsov","year":"2018","journal-title":"Ind. Eng. Chem. Res."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1016\/j.jhazmat.2011.08.070","article-title":"Design of polyoxometallate\u2013titania composite film (H3PW12O40\/TiO2) for the degradation of an aqueous dye Rhodamine B under the simulated sunlight irradiation","volume":"199\u2013200","author":"Lu","year":"2012","journal-title":"J. Hazard. Mater."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"11566","DOI":"10.1021\/ie501839q","article-title":"Adsorption of Human Serum Albumin (HSA) by SWNTs\/Py-PW11 Nanocomposite","volume":"53","author":"Ji","year":"2014","journal-title":"Ind. Eng. Chem. Res."},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"1704479","DOI":"10.1002\/adma.201704479","article-title":"An Unusual Strong Visible-Light Absorption Band in Red Anatase TiO2 Photocatalyst Induced by Atomic Hydrogen-Occupied Oxygen Vacancies","volume":"30","author":"Yang","year":"2018","journal-title":"Adv. Mater."},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"043106","DOI":"10.1063\/1.5017051","article-title":"Wavelength-dependent visible light response in vertically aligned nanohelical TiO2-based Schottky diodes","volume":"112","author":"Kwon","year":"2018","journal-title":"Appl. Phys. Lett."},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"7115","DOI":"10.1021\/ac2014299","article-title":"Determination of Inorganic Improvised Explosive Device Signatures Using Laser Electrospray Mass Spectrometry Detection with Offline Classification","volume":"83","author":"Flanigan","year":"2011","journal-title":"Anal. Chem."},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"7269","DOI":"10.1039\/c1jm10124b","article-title":"Sensitivity of titania(B) nanowires to nitroaromatic and nitroamino explosives at room temperature via surface hydroxyl groups","volume":"21","author":"Wang","year":"2011","journal-title":"J. Mater. Chem."}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/19\/4\/915\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T12:33:55Z","timestamp":1760186035000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/19\/4\/915"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2019,2,21]]},"references-count":35,"journal-issue":{"issue":"4","published-online":{"date-parts":[[2019,2]]}},"alternative-id":["s19040915"],"URL":"https:\/\/doi.org\/10.3390\/s19040915","relation":{},"ISSN":["1424-8220"],"issn-type":[{"value":"1424-8220","type":"electronic"}],"subject":[],"published":{"date-parts":[[2019,2,21]]}}}