An effective and green method to incorporate graphene oxide into quaternized hemicelluloses to form a hemicelluloses based film was introduced in this study. Tight, homogeneous, and smooth surfaces of the film were obtained from the SEM image. Data on the mechanical properties of the films indicated that the hybrid films prepared from QH and GO (component of GO was 4.8%) exhibited a high tensile strength of 43.83 MPa. This finding suggested that addition of GO contributed to the desirable mechanical properties of the hybrid film. The hybrid films exhibited high sensitivity to humidity; they could be bent spontaneously under wet conditions within seconds and stretched under dry conditions. In addition, the results of DMA indicated that the storage modulus of the hybrid films had an order of magnitude change in value at different humidities. These characteristics show that films can be potentially used in bio-medicine, packaging materials, and humidity sensors.
The rapid development of artificial intelligent and internet of things calls for high-performance multifunctional devices for synchronous detection of a wide variety of environmental signals, such as gas, light, and humidity. Herein, highly crystallized tin dioxide (SnO 2 ) microwires (MWs) with low density of point defects are synthesized by the chemical vapor deposition method and constructed into a multifunctional device for photo and humidity sensing. The device shows excellent photoelectric performances, for example, ultralow dark current of ≈10 −13 A, ultrahigh on–off ratio of >10 7 , UV/visible rejection ratio of R 300 nm / R 400 nm > 10 7 , specific detectivity ( D *) of 1.16 × 10 15 Jones, linear dynamic range (LDR) of 152 dB, high responsivity of 18 A W −1 , and fast photoresponse speed of t rise / t decay = 2.7 µs/2.5 ms at 5 V bias. Furthermore, the p-CuI/n-SnO 2 heterojunction shows outstanding self-powered properties, such as responsivity of 8.98 mA W −1 , specific detectivity of 1.98 × 10 12 Jones and LDR of 106 dB at 0 V bias. Additionally, the SnO 2 MWs also show high sensitivity to ambient humidity changes. Therefore, the SnO 2 MWs show high potential for multifunctional applications, such as UV photodetector and humidity sensor.
危险品化学品经营许可证（带存储）