Hybrid　bimodal　mesoporous　silica　grafted　1,8-naphthalic　anhydride　(NA)　as　a　luminescent　tracer　was　modified　by　Eu3+　ions,　whereas　the　influence　of　the　interaction　between　europium　salts　with　various　anions　(Cl-,　NO3-,　and　CH3COO-)　and　NA　molecules　grafted　onto　the　mesopores　on　their　thermal　decomposition　behaviors　and　kinetic　properties　were　studied　in　detail　in　accordance　with　the　thermogravimetric　analyzer　(TGA)　profiles　obtained　at　different　heating　rates　under　flowing　N-2　atmosphere.　Meanwhile,　Kissinger　and　Flynn-Wall-Ozawa　algorithms　were　used　to　calculate　the　apparent　activation　energies　of　Eu3+-modified　NA　existing　in　the　mesoporous　channels　and　therefore　the　thermal　decomposition　mechanism　was　discussed　on　the　basis　of　the　Coats-Redfern　method.　Moreover,　XRD,　TEM,　N-2　adsorption-desorption　isotherms　and　FT-IR　techniques　were　employed　to　analyze　the　structural　characteristics　and　textural　properties　of　the　resultant　samples.　(C)　2014　Elsevier　B.V.　All　rights　reserved.