Supratm55

An Agilent 7890A GC system (Agilent Technologies, Palo Alto, California, USA) equipped with a flame ionization detector (FID) and a split/splitless inlet was used. All chromatographic separations were performed under the following conditions: ultrapure nitrogen (>99.999%) as a carrier gas and make-up gas, injection port at 200 °C, split injection mode at a ratio of 100:1, and FID detector at 300 °C. A field-emission scanning electron microscope (SEM, SUPRATM55, Carl Zeiss, AG, Heidenheim, Germany) and an energy-dispersive X-ray spectrometer (EDS, Oxford INCA X-Act, High Wycombe, England) were used for the characterization.

X-ray diffraction (XRD, D/max-2500B2+/PCX, Rigaku, Tokyo, Japan) was used to characterize the crystal structure of the as-prepared FR-MoS₂/PPy, while X-ray photoelectron spectroscopy (XPS, ESCALAB 250, ThermoFisher Scientific, Waltham, MA, USA) was used for element valence analysis. A Fourier transform infrared spectrometer (FTIR, Nicolet iS50, Thermo Nicolet, Ramsey, MN, USA) was used to determine the functional groups of the conductive polymers. The content of MoS₂ in the composite was tested by a thermogravimetric test (TGA, TGA/DSC 1/1100 SF, METTLER, Greifensee, Switzerland) at a temperature range of 25–800 °C. The morphology and element distribution of the composite material were tested by a scanning electron microscope (SEM, Supratm55, ZEISS, Oberkochen, Germany), its internal structure was observed by a transmission electron microscope (TEM, Tecnai G2 F30, FEI, Hillsboro, OR, USA), and the crystal structure of the material was further analyzed by a high-resolution transmission electron microscope (HRTEM, Tecnai G2 F30, FEI, Hillsboro, OR, USA) and a selected-area electron diffraction pattern (SEAD, Tecnai G2 F30, FEI, Hillsboro, OR, USA).

An Agilent 1260 HPLC system (Santa Clara, CA, USA) equipped with a 20 μL sample loop, a Zorbax C₁₈ column (250 × 4.6 mm i.d., 5 μm) and a diode array detector (DAD) was used for the detection of estrogens. HPLC conditions included 25 °C of column temperature, 1.00 mL/min of acetonitrile:water (50:50, v/v) as mobile phase and the detection wavelength at 202 nm. A P600 pump from Beijing Laibo Taike Instrument Co., Ltd. (Beijing, China) was used to transport the sample solution through the extraction tube. Bare BFs and COPs-BFs were characterized by a field-emission scanning electron microscope (SEM, SUPRATM55, Carl Zeiss, AG, Germany). COPs were detected by a Fourier transform infrared spectrometer (FT-IR, NICOLET AVATAR 330, Thermo Electron Corporation, Waltham, MA, USA).