We present the measurements of the ϕ-meson production and elliptic flow (v_2) at mid-rapidity in Au + Au collisions at √(s_NN) = 7.7 - 200 GeV. The data are collected using the STAR detector in the years 2010 and 2011. The energy dependence of nuclear modification factor (R_CP) of ϕ meson is presented. The ϕ-meson R_CP has a value ≥ 1.0 for √(s_NN) ≤ 39 GeV. The Ω/ϕ ratios are also presented and show a different trend at the intermediate transverse momentum (p_T) for √(s_NN) = 11.5 GeV compared

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... to higher beam energies. The number-of-constituent quark (NCQ) scaling of v_2 has been studied at various beam energies. The NCQ scaling holds for particles and anti-particles separately including the ϕ meson for √(s_NN) ≥ 19.6 GeV, which can be considered as an evidence of partonic collectivity. We observe at √(s_NN) = 7.7 and 11.5 GeV, the ϕ-meson v_2 falls off the trend from the other hadrons at highest measured p_T values by 1.8σ and 2.3σ, respectively.