A novel nanomaterial formed by a Cu₂ZnSnS₄ (CZTS)/CeO₂ heterojunction with excellent electrochemical sensing for ammonia nitrogen was prepared by a microwave irradiation method combined with a hydrothermal method. The properties of the CZTS/CeO₂ heterojunction were investigated by a series of characterizations such as Raman spectra, x-ray diffraction, scanning electron microscopy, thermogravimetric analysis, specific surface area (SSA), temperature-programmed desorption of ammonia and UV–vis spectroscopy. Nickel foam was used as a conductive frame electrode in order to enhance the sensitivity of the sensor along with the electrical conductivity, permeability and SSA. It is revealed by electrochemical measurements that the ammonia nitrogen oxidation reaction occurring in the sensing electrode of the CZTS/CeO₂ heterojunction demonstrated regulation of I _p (mA) = 6.4 10⁻³C (mM)+ 0.1527 (R ²= 0.9987) in a wide concentration range of 0–380.0 mM with a low detection of 6.0 μM according to the signal-to-noise ratio (S/N= 2). The CZTS/CeO₂ heterojunction is expected to become a new candidate semiconductor nanomaterial for the electrochemical detection of ammonia nitrogen in an aqueous solution.

通过微波辐照法结合水热法制备了一种由Cu ₂ ZnSnS ₄ (CZTS)/CeO ₂异质结形成的具有优异氨氮电化学传感的新型纳米材料。CZTS/CeO ₂的性质通过一系列表征研究了异质结，如拉曼光谱、X 射线衍射、扫描电子显微镜、热重分析、比表面积 (SSA)、氨的程序升温解吸和紫外-可见光谱。泡沫镍用作导电框架电极，以提高传感器的灵敏度以及导电性、渗透性和 SSA。电化学测量表明，在 CZTS/CeO ₂异质结的传感电极中发生的氨氮氧化反应表明对I _p (mA) = 6.4 10 ^-3 C (mM)+ 0.1527 ( R ²= 0.9987) 在 0–380.0 mM 的宽浓度范围内，根据信噪比 ( S / N = 2)，检测值低至 6.0 μ M。CZTS/CeO ₂异质结有望成为电化学检测水溶液中氨氮的新型候选半导体纳米材料。