WO₃-based composites containing ZnWO₄/WO₃ heterojunction were prepared by a one-step thermal compensation decomposition process. The thermal compensation agent plays an important role in improving thermal decomposition efficiency, particle size and particle dispersion regulation. This process is very simple to mass produce spherical WO₃ nanoparticles with excellent short-range electron transport ability, while abandons the cumbersome synthesis of eye-catching fancy structures. Core-shell-shaped and mulberry-type configuration of nanoparticles are the mainstream morphology of this process. They are endowed with excellent gas sensitivity to H₂S, accompanied with strong selectivity and cycle stability, especially the low detection limit as low as 0.0783 ppm. A convincing gas-sensing mechanism with synergy of multiple structural effects have been proposed, including the temperature dependence of vacancy oxygen restricting the optimal working temperature of gas sensors, spherical nanostructures providing short distance of electron migration, and heterojunctions promoting electron migration. ZnWO₄/WO₃-heterojunction-based nanostructures prepared in situ by thermal decomposition will have broad prospects in the detection of trace H₂S.

采用一步热补偿分解法制备了含有ZnWO ₄ /WO ₃异质结的WO _{3基复合材料。}热补偿剂在提高热分解效率、粒径和颗粒分散调节方面起着重要作用。该工艺非常简单，可以大量生产具有优异短程电子传输能力的球形WO _{3纳米粒子，同时摒弃了繁琐的合成吸引眼球的花式结构。}纳米粒子的核壳型和桑葚型构型是该过程的主流形貌。_{它们对 H 2}具有出色的气体敏感性S，具有很强的选择性和循环稳定性，特别是检出限低至0.0783 ppm。已经提出了一种具有多种结构效应协同作用的令人信服的气体传感机制，包括限制气体传感器最佳工作温度的空位氧的温度依赖性，提供短距离电子迁移的球形纳米结构，以及促进电子迁移的异质结。原位热分解制备ZnWO ₄ /WO _{3异质结纳米结构在微量H 2} S的检测中具有广阔的应用前景。