截至目前為止，所有對活性碳的研究主要都是在探討濾毒罐，並沒有任何關於附加活性碳拋棄式防塵口罩的數據。因此，本研究主要目的在於探討市售附加活性碳拋棄式防塵口罩的性能。此外，在文獻中指出，將光觸媒TiO2與吸附劑結合使用時，在適當的使用環境下能夠提高其對有機蒸氣的吸附效率。所以，本研究也測試活性碳與TiO2結合使用的效果，並進一步探討以TiO2對吸附飽和的活性碳進行再生利用的可行性。本研究中，根據CNS 14756 Z2126的標準進行附加活性碳拋棄式防塵口罩之性能測試，測試氣體為環己烷，濃度為50ppm，測試流率、溫度及相對濕度條件分別為30±1 L/min、25±5℃與70±5%。量測儀器是利用光離子偵測器(PID)連續偵測口罩上、下游之環己烷濃度，藉以計算出口罩之吸附效率曲線，此外，也以斜臂式壓力計同時量測口罩的空氣阻抗。結果顯示，8款附加活性碳拋棄式防塵口罩5ppm破出時間為0.12~2.25分鐘，均無法達到CNS國家標準15分鐘的要求。而光觸媒雖然能增加活性碳的吸附能力，但微粒的負載卻會使活性碳吸附能力降低，兩者相互競爭的結果，雖然使活性碳對環己烷的總吸附量增加，但卻縮短其5%破出時間，對於利用光觸媒對活性碳進行回收的效果，則是相當不理想。

Study of activated carbon respirators thus far has primarily been concerned with cartridges; there is little data that specifically addresses the performance of carbon-based filtering facemasks. Therefore, the objective of this study is to investigate the performance of commercial carbon-based disposable respirators. Since studies have shown that combining photocatalyst TiO2 with adsorbents appears to increase adsorption, the effect of TiO2 on the adsorption efficiency of carbon-based disposable respirators was also investigated. In addition, the feasibility of recovering the activated carbon by loading it with TiO2 is considered in this study. The respirator performance was tested as specified by CNS 14756 Z2126. The flow rate, temperature, and relative humidity were controlled at 30±1 L/min, 25±5℃, and 70±5%, respectively. Cyclohexane vapor in the air flow was regulated precisely at a concentration of 50ppm. A photoionization detector was used to monitor the concentrations of cyclohexane upstream and downstream of the filters, and the adsorption efficiency curves of the respirators were calculated accordingly. The pressure drop across the respirators was measured using an inclined manometer. A UV light was used to activate the TiO2 and to recover the saturated carbon filters. The 5-ppm breakthrough times of eight types of carbon-based filtering facemasks ranged from 0.12 to 2.25 minutes. None met the standard specified by CNS. Although the combination of TiO2 with activated carbon enhanced its adsorption, particle loading would reduce the adsorption of activated carbon. The results also suggest that using TiO2 to recover activated carbon is not feasible.